/*
 * Turbo8bit - Commodore 64 Learning Website
 * 
 * Authentic C64 Color Palette:
 * - Black: #000000
 * - White: #FFFFFF
 * - Red: #880000
 * - Cyan: #AAFFEE (light cyan - used for text)
 * - Purple: #CC44CC
 * - Green: #00CC55
 * - Blue: #0000AA (classic C64 background blue)
 * - Yellow: #EEEE77
 * - Orange: #DD8855
 * - Brown: #664400
 * - Light Red: #FF7777
 * - Dark Grey: #333333
 * - Grey: #777777
 * - Light Green: #AAFF66
 * - Light Blue: #6C5EB5 (authentic C64 light blue)
 * - Light Grey: #BBBBBB
 */

:root {
    /* Authentic C64 Color Palette */
    --c64-black: #000000;
    --c64-white: #FFFFFF;
    --c64-red: #9F4E44;
    --c64-cyan: #6ABFC6;
    --c64-purple: #A057A3;
    --c64-green: #5CAB5E;
    --c64-blue: #40318D;
    --c64-yellow: #C9D487;
    --c64-orange: #A1683C;
    --c64-brown: #6D5412;
    --c64-light-red: #CB7E75;
    --c64-dark-grey: #626262;
    --c64-grey: #898989;
    --c64-light-green: #9AE29B;
    --c64-light-blue: #887ECB;
    --c64-light-grey: #ADADAD;
    
    /* Theme variables - classic C64 boot screen colors */
    --bg-primary: var(--c64-blue);
    --bg-secondary: var(--c64-dark-grey);
    --text-primary: var(--c64-light-blue);
    --text-secondary: var(--c64-cyan);
    --accent-primary: var(--c64-light-blue);
    --accent-secondary: var(--c64-light-green);
    --border-color: var(--c64-light-blue);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    font-size: 1rem;
    line-height: 1.6;
}

/* Header */
.site-header {
    background-color: var(--c64-black);
    border-bottom: 4px solid var(--c64-light-blue);
    padding: 0rem 2rem;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

/* C64 Silver Label Badge */
.c64-badge {
    /* Dimensions - scaled for header */
    height: 44px;
    padding: 8px 20px;
    margin: 8px 0;
    
    /* Layout */
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    text-decoration: none;

    /* The Silver "Brushed Metal" Effect */
    background: linear-gradient(
        180deg, 
        #e6e6e6 0%, 
        #cccccc 15%, 
        #b3b3b3 40%, 
        #cccccc 85%, 
        #e6e6e6 100%
    );
    
    /* Border and Bevels */
    border: 1px solid #999;
    border-radius: 12px;
    box-shadow: 
        inset 0 1px 0 rgba(255,255,255,0.8),
        0 2px 5px rgba(0,0,0,0.5);
    
    /* Text Styling Default */
    font-family: 'Michroma', sans-serif;
    user-select: none;
}

.c64-badge:hover {
    background: linear-gradient(
        180deg, 
        #f0f0f0 0%, 
        #d6d6d6 15%, 
        #bdbdbd 40%, 
        #d6d6d6 85%, 
        #f0f0f0 100%
    );
}

/* "commodore" TEXT */
.c64-text-logo {
    font-size: 27px;
    color: #1a1a1a;
    letter-spacing: -0.5px;
    text-shadow: 0 1px 0 rgba(255,255,255,0.5);
    transform: scaleX(1.1);
}

/* THE RAINBOW STRIPES */
.c64-stripes {
    display: flex;
    width: 40px;
    height: 22px;
    border: 1px solid rgba(0,0,0,0.1);
}

.c64-stripes .stripe {
    flex: 1;
    height: 100%;
}

/* Commodore Rainbow Colors */
.c64-stripes .red    { background-color: #C62626; }
.c64-stripes .orange { background-color: #E6680D; }
.c64-stripes .yellow { background-color: #F2C822; }
.c64-stripes .green  { background-color: #3E942D; }
.c64-stripes .blue   { background-color: #26439C; }
.c64-stripes .violet { background-color: #6C2B8F; }

/* "64" TEXT */
.c64-model-number {
    font-size: 25px;
    color: #1a1a1a;
    font-weight: bold;
    text-shadow: 0 1px 0 rgba(255,255,255,0.5);
}

.main-nav {
    display: flex;
    align-items: center;
    margin-left: auto;
}

.main-nav a {
    color: var(--c64-yellow);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 2px solid transparent;
    transition: all 0.2s;
}

.main-nav a:hover {
    border-color: var(--c64-yellow);
}

/* User Authentication */
.user-auth {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-auth .user-name {
    color: var(--c64-light-blue);
    font-size: 0.75rem;
}

.user-auth .auth-btn {
    background: var(--c64-light-blue);
    color: var(--c64-blue);
    border: none;
    padding: 0.25rem 0.75rem;
    font-family: 'Press Start 2P', monospace;
    font-size: 0.6rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
}

.user-auth .auth-btn:hover {
    background: var(--c64-yellow);
}

/* Footer */
.site-footer {
    background-color: var(--c64-black);
    border-top: 4px solid var(--c64-light-blue);
    padding: 2rem 2rem 1.5rem;
    text-align: center;
}

.site-footer .ready-prompt {
    color: var(--c64-light-blue);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.site-footer .footer-text {
    color: var(--c64-grey);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.site-footer .footer-tagline {
    color: var(--c64-light-blue);
    font-size: 0.8125rem;
}

/* Hero Section */
.hero-section {
    background-color: var(--c64-blue);
    padding: 3rem 2rem 1.5rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.c64-boot-screen {
    background-color: var(--c64-blue);
    border: 3px solid var(--c64-light-blue);
    padding: 1.5rem;
    margin-bottom: 2rem;
    text-align: left;
    display: inline-block;
}

.boot-line {
    color: var(--c64-light-blue);
    font-size: 0.9375rem;
    margin-bottom: 0.25rem;
}

.boot-line.ready {
    margin-top: 1rem;
}

.boot-cursor {
    color: var(--c64-light-blue);
    font-size: 0.9375rem;
    animation: blink 1s infinite;
    display: inline;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-title {
    color: var(--c64-cyan);
    font-size: 2rem;
    margin-bottom: 1rem;
    text-shadow: 3px 3px 0 var(--c64-black);
}

.hero-subtitle {
    color: var(--c64-light-blue);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.hero-stats {
    color: var(--c64-grey);
    font-size: 1rem;
    margin-bottom: 0;
}

.hero-cta {
    display: inline-block;
    background-color: var(--c64-cyan);
    color: var(--c64-black);
    padding: 1rem 2rem;
    text-decoration: none;
    border: 3px solid var(--c64-black);
    font-size: 1rem;
    transition: all 0.2s;
}

.hero-cta:hover {
    background-color: var(--c64-light-green);
    transform: scale(1.05);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
}

/* Timeline Container */
.timeline-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem 2rem;
}

.timeline-header {
    text-align: center;
    margin-bottom: 2rem;
}

.timeline-header h1,
.timeline-header h2 {
    color: var(--c64-cyan);
    font-size: 1.75rem;
    margin-bottom: 1rem;
    text-shadow: 3px 3px 0 var(--c64-black);
}

.timeline-header .subtitle,
.timeline-header .timeline-intro {
    color: var(--c64-light-grey);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Timeline */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: calc(100% - 220px);
    background: linear-gradient(
        to bottom,
        var(--c64-light-blue) 0%,
        var(--c64-cyan) 50%,
        var(--c64-light-green) 100%
    );
    top: 0;
}

/* Year Marker */
.timeline-year-marker {
    position: relative;
    text-align: center;
    margin: 2rem 0;
    z-index: 10;
}

.year-label {
    display: inline-block;
    background-color: var(--c64-black);
    color: var(--c64-yellow);
    padding: 0.75rem 1.5rem;
    border: 3px solid var(--c64-yellow);
    font-size: 1.25rem;
}

/* Timeline Item */
.timeline-item {
    position: relative;
    width: 50%;
    padding: 0.25rem 2rem;
    margin-bottom: 0;
}

.timeline-item.right {
    left: 50%;
    padding-left: 3rem;
}

.timeline-item.left {
    left: 0;
    padding-right: 3rem;
    text-align: right;
}

.timeline-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: var(--c64-cyan);
    border: 2px solid var(--c64-black);
    top: 50%;
    transform: translateY(-50%);
}

.timeline-item.right .timeline-dot {
    left: -6px;
}

.timeline-item.left .timeline-dot {
    right: -6px;
}

.timeline-content {
    background-color: var(--c64-black);
    border: 3px solid var(--c64-light-blue);
    padding: 1rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    text-decoration: none;
    cursor: pointer;
}

.timeline-item.right .timeline-content {
    border-left-width: 6px;
}

.timeline-item.left .timeline-content {
    border-right-width: 6px;
    flex-direction: row-reverse;
}

.timeline-item.right .timeline-content .computer-icon {
    margin-right: 1rem;
}

.timeline-item.left .timeline-content .computer-icon {
    margin-left: 1rem;
}

/* Timeline covers for games and other entities */
.timeline-cover {
    max-height: 65px;
    background-color: transparent;
    border: none;
    flex-shrink: 0;
    /* High-quality scaling for photographic images */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: smooth;
    image-rendering: high-quality;
}

.timeline-cover.has-cover {
    background-repeat: no-repeat;
}

.timeline-item.right .timeline-content .timeline-cover {
    margin-right: 1rem;
}

.timeline-item.left .timeline-content .timeline-cover {
    margin-left: 1rem;
}

.timeline-content:hover {
    border-color: var(--c64-cyan);
    transform: scale(1.02);
}

.timeline-text {
    display: block;
}

.timeline-text .item-name {
    display: block;
    color: var(--c64-cyan);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.timeline-text .item-subtitle {
    display: block;
    color: var(--c64-light-grey);
    font-size: 0.9375rem;
    font-style: italic;
    margin-bottom: 0.25rem;
}

.timeline-text .item-date {
    display: block;
    color: var(--c64-grey);
    font-size: 0.875rem;
}

.timeline-content:hover .item-name {
    color: var(--c64-light-green);
}

/* Expand icon */
.expand-icon {
    color: var(--c64-grey);
    font-size: 0.875rem;
    margin-left: auto;
    padding-left: 1rem;
    transition: transform 0.3s;
}

.timeline-item.expanded .expand-icon {
    transform: rotate(180deg);
}

/* Expanded timeline content - separate box below */
.timeline-expanded {
    display: none;
    background-color: var(--c64-black);
    border: 3px solid var(--c64-light-blue);
    padding: 1rem;
    margin-top: 0.5rem;
    text-align: left;
}

.timeline-item.expanded .timeline-expanded {
    display: block;
}

.timeline-item.expanded .timeline-content {
    border-color: var(--c64-cyan);
}

/* Non-expandable items */
.timeline-item.no-expand .timeline-content {
    cursor: default;
}

.timeline-item.no-expand .expand-icon {
    display: none;
}

.timeline-item.no-expand .timeline-content:hover {
    transform: none;
}

.expanded-summary {
    color: var(--c64-light-grey);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.expanded-summary:last-child {
    margin-bottom: 0;
}

.expanded-specs {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.25rem 1rem;
}

.expanded-specs dt {
    color: var(--c64-light-blue);
    font-size: 0.875rem;
}

.expanded-specs dd {
    color: var(--c64-light-grey);
    font-size: 0.875rem;
}

/* Different colors for item types */
.timeline-item[data-type="CPU"] .timeline-dot {
    background-color: var(--c64-purple);
}

.timeline-item[data-type="CPU Family"] .timeline-dot {
    background-color: var(--c64-orange);
}

.timeline-item[data-type="Computer"] .timeline-dot {
    background-color: var(--c64-cyan);
}

.timeline-item[data-type="Person"] .timeline-dot {
    background-color: var(--c64-light-green);
}

.timeline-item[data-type="Sound Chip"] .timeline-dot {
    background-color: var(--c64-light-red);
}

.timeline-item[data-type="Video Chip"] .timeline-dot {
    background-color: var(--c64-yellow);
}

.timeline-item[data-type="Programming Language"] .timeline-dot,
.timeline-item[data-type="Operating System"] .timeline-dot {
    background-color: var(--c64-light-blue);
}

.timeline-item[data-type="Game"] .timeline-dot {
    background-color: var(--c64-green);
}

/* Machine Detail Page */
.machine-detail {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.machine-header {
    margin-bottom: 2rem;
}

.back-link {
    display: inline-block;
    color: var(--c64-yellow);
    text-decoration: none;
    font-size: 0.9375rem;
    margin-bottom: 1.5rem;
    padding: 0.5rem 1rem;
    border: 2px solid var(--c64-yellow);
    transition: all 0.2s;
}

.back-link:hover {
    background-color: var(--c64-yellow);
    color: var(--c64-black);
}

.machine-header h1 {
    color: var(--c64-cyan);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 0 var(--c64-black);
}

.machine-year {
    color: var(--c64-light-green);
    font-size: 1.75rem;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
}

.info-card {
    background-color: var(--c64-black);
    border: 3px solid var(--c64-light-blue);
    padding: 1.5rem;
}

.info-card h3 {
    color: var(--c64-yellow);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--c64-dark-grey);
}

.info-card dl {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 0.75rem;
}

.info-card dt {
    color: var(--c64-grey);
    font-size: 0.875rem;
}

.info-card dd {
    color: var(--c64-cyan);
    font-size: 0.9375rem;
}

.machine-notes {
    color: var(--c64-light-grey);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.wiki-link {
    display: inline-block;
    color: var(--c64-light-blue);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border: 2px solid var(--c64-light-blue);
    transition: all 0.2s;
}

.wiki-link:hover {
    background-color: var(--c64-light-blue);
    color: var(--c64-black);
}

/* Related Section */
.related-section {
    background-color: var(--c64-black);
    border: 3px solid var(--c64-light-blue);
    padding: 1.5rem;
}

.related-section h3 {
    color: var(--c64-yellow);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.related-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.related-card {
    background-color: var(--c64-dark-grey);
    border: 2px solid var(--c64-grey);
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.related-card .thing-type {
    color: var(--c64-grey);
    font-size: 0.75rem;
    text-transform: uppercase;
}

.related-card .thing-name {
    color: var(--c64-cyan);
    font-size: 0.875rem;
}

/* Type-specific colors */
.related-card.cpu {
    border-color: var(--c64-purple);
}

.related-card.cpu .thing-name {
    color: var(--c64-purple);
}

.related-card.cpu-family {
    border-color: var(--c64-orange);
}

.related-card.cpu-family .thing-name {
    color: var(--c64-orange);
}

.related-card.company {
    border-color: var(--c64-green);
}

.related-card.company .thing-name {
    color: var(--c64-green);
}

.related-card.computer {
    border-color: var(--c64-light-blue);
}

.related-card.computer .thing-name {
    color: var(--c64-light-blue);
}

/* Responsive Timeline */
@media (max-width: 768px) {
    .site-header {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .logo-turbo,
    .logo-8bit {
        font-size: 1rem;
    }
    
    .main-nav a {
        padding: 0.4rem 0.6rem;
        font-size: 0.875rem;
    }
    
    .site-footer {
        padding: 1rem;
        font-size: 0.8125rem;
    }
    
    .timeline-container {
        padding: 1rem;
    }
    
    .timeline-line {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 50px !important;
        padding-right: 1rem !important;
        text-align: left !important;
    }
    
    .timeline-dot {
        left: 12px !important;
        right: auto !important;
    }
    
    .timeline-content {
        border-left-width: 6px !important;
        border-right-width: 3px !important;
    }
    
    .year-label {
        font-size: 1rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--c64-black);
}

::-webkit-scrollbar-thumb {
    background: var(--c64-light-blue);
    border: 2px solid var(--c64-black);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--c64-cyan);
}

/* Pixel effect animation */
@keyframes pixelate {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.logo:hover .logo-turbo,
.logo:hover .logo-8bit {
    animation: pixelate 0.3s ease-in-out infinite;
}

/* Thing Detail Page */
.thing-detail {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.thing-header {
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.thing-header .back-link {
    width: 100%;
    flex-shrink: 0;
}

.thing-header-text {
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.thing-icon-large {
    order: -1;
    padding: 0.5rem;
    background-color: #000000;
    border: 3px solid var(--c64-cyan);
    align-self: flex-start;
}

.thing-cover-large {
    order: -1;
    background-color: #000000;
    border: 3px solid var(--c64-cyan);
    box-shadow: 4px 4px 0 var(--c64-dark-grey);
    align-self: flex-start;
    flex-shrink: 0;
    max-height: 210px;
    /* High-quality scaling for photographic images */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: smooth;
    image-rendering: high-quality;
}

.thing-cover-large.has-cover {
    background-repeat: no-repeat;
}

/* Screenshots Section */
.screenshots-section {
    margin: 2rem 0;
    padding: 1rem;
    background-color: var(--c64-dark-grey);
    border: 2px solid var(--c64-grey);
}

.screenshots-grid {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.screenshot-thumb {
    display: block;
    max-width: 300px;
    border: 2px solid var(--c64-cyan);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.screenshot-thumb:hover {
    transform: scale(1.02);
    border-color: var(--c64-light-green);
}

.screenshot-thumb img {
    display: block;
    width: 100%;
    height: auto;
    image-rendering: auto;
}

/* Thing detail responsive styles */
@media (max-width: 600px) {
    .thing-detail {
        padding: 1rem;
    }
    
    .thing-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .thing-header .back-link {
        text-align: left;
        align-self: flex-start;
    }
    
    .thing-header h1 {
        font-size: 1rem;
    }
    
    .thing-cover-large,
    .thing-icon-large {
        order: 0;
        margin: 0 auto 1rem;
        max-width: 80%;
    }
    
    .thing-header-text {
        width: 100%;
    }
    
    .thing-type-badge {
        display: inline-block;
    }
    
    .thing-year {
        font-size: 1rem;
    }
    
    .info-grid {
        gap: 1rem;
    }
    
    .info-card {
        padding: 1rem;
    }
    
    .info-card dl {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .info-card dt {
        margin-top: 0.5rem;
    }
    
    .nostalgia-box {
        padding: 1rem;
    }
    
    .promo-content {
        flex-direction: column;
        text-align: center;
    }
    
    .promo-button {
        width: 100%;
        text-align: center;
    }
    
    .related-section {
        padding: 1rem;
    }
    
    .related-grid {
        flex-direction: column;
    }
    
    .related-card {
        width: 100%;
    }
    
    .screenshots-section {
        padding: 0.5rem;
    }
    
    .screenshot-thumb {
        max-width: 100%;
    }
}

.thing-type-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    margin-bottom: 1rem;
    border: 2px solid;
}

.thing-type-badge.computer {
    color: var(--c64-cyan);
    border-color: var(--c64-cyan);
}

.thing-type-badge.cpu {
    color: var(--c64-purple);
    border-color: var(--c64-purple);
}

.thing-type-badge.cpu-family {
    color: var(--c64-orange);
    border-color: var(--c64-orange);
}

.thing-type-badge.company {
    color: var(--c64-green);
    border-color: var(--c64-green);
}

.thing-type-badge.sound-chip {
    color: var(--c64-light-red);
    border-color: var(--c64-light-red);
}

.thing-type-badge.video-chip {
    color: var(--c64-yellow);
    border-color: var(--c64-yellow);
}

.thing-type-badge.person {
    color: var(--c64-light-green);
    border-color: var(--c64-light-green);
}

.thing-type-badge.operating-system,
.thing-type-badge.programming-language {
    color: var(--c64-light-blue);
    border-color: var(--c64-light-blue);
}

.thing-type-badge.game {
    color: var(--c64-light-red);
    border-color: var(--c64-light-red);
}

.thing-header h1 {
    color: var(--c64-cyan);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    margin-top: 0;
    text-shadow: 2px 2px 0 var(--c64-black);
    word-wrap: break-word;
}

.thing-year {
    color: var(--c64-light-green);
    font-size: 1.75rem;
}

.thing-achievement {
    color: var(--c64-yellow);
    font-size: 1rem;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--c64-dark-grey);
    border-left: 4px solid var(--c64-yellow);
    display: inline-block;
}

/* Nostalgia Box */
.nostalgia-box {
    background-color: var(--c64-dark-grey);
    border: 3px solid var(--c64-cyan);
    border-left-width: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.nostalgia-text {
    color: var(--c64-cyan);
    font-size: 1rem;
    font-style: italic;
    line-height: 1.8;
}

/* Thing Info Section */
.thing-info {
    margin-top: 2rem;
}

/* Promo Panel */
.promo-panel-link {
    text-decoration: none;
    display: block;
}

.promo-panel-link:hover .promo-panel {
    border-color: var(--c64-cyan);
    box-shadow: 0 0 30px rgba(170, 255, 102, 0.4);
}

.promo-panel-link:hover .promo-button {
    background-color: var(--c64-cyan);
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(170, 255, 238, 0.5);
}

.promo-panel {
    background: linear-gradient(135deg, var(--c64-dark-grey) 0%, #1a1a2e 100%);
    border: 3px solid var(--c64-light-green);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 0 20px rgba(170, 255, 102, 0.2);
    transition: all 0.2s ease;
}

.promo-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.promo-cover {
    width: 80px;
    height: 80px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    flex-shrink: 0;
}

.promo-text {
    flex: 1;
    min-width: 200px;
}

.promo-text strong {
    color: var(--c64-light-green);
    font-size: 1.0625rem;
    display: block;
    margin-bottom: 0.5rem;
}

.promo-text p {
    color: var(--c64-light-grey);
    font-size: 0.9375rem;
    margin: 0;
}

.promo-button {
    background-color: var(--c64-light-green);
    color: var(--c64-black);
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    font-size: 0.9375rem;
    border: none;
    transition: all 0.2s ease;
}

.promo-button:hover {
    background-color: var(--c64-cyan);
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(170, 255, 238, 0.5);
}

/* Thing Summary */
.thing-summary {
    color: var(--c64-light-grey);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* Trivia Section */
.trivia-section {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 2px solid var(--c64-dark-grey);
}

.trivia-section h4 {
    color: var(--c64-yellow);
    font-size: 0.9375rem;
    margin-bottom: 1rem;
}

.trivia-list {
    list-style: none;
    padding: 0;
}

.trivia-list li {
    color: var(--c64-light-grey);
    font-size: 0.875rem;
    line-height: 1.8;
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.trivia-list li::before {
    content: "►";
    color: var(--c64-light-green);
    position: absolute;
    left: 0;
}

/* Related card links */
.related-card {
    text-decoration: none;
    transition: all 0.2s;
}

.related-card:hover {
    transform: scale(1.05);
    border-width: 3px;
}

/* More thing type colors for related cards */
.related-card.sound-chip {
    border-color: var(--c64-light-red);
}

.related-card.sound-chip .thing-name {
    color: var(--c64-light-red);
}

.related-card.video-chip {
    border-color: var(--c64-yellow);
}

.related-card.video-chip .thing-name {
    color: var(--c64-yellow);
}

.related-card.person {
    border-color: var(--c64-light-green);
}

.related-card.person .thing-name {
    color: var(--c64-light-green);
}

.related-card.operating-system,
.related-card.programming-language {
    border-color: var(--c64-light-blue);
}

.related-card.operating-system .thing-name,
.related-card.programming-language .thing-name {
    color: var(--c64-light-blue);
}

/* Timeline item type in left column */
.timeline-link .item-type {
    display: block;
    color: var(--c64-grey);
    font-size: 0.75rem;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

/* ======================================
   PIXEL ART SPRITES (64x64 base size)
   ====================================== */

/* Timeline End Marker */
.timeline-end {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
    margin-top: 1rem;
}

.era-title {
    display: block;
    color: var(--c64-yellow);
    font-size: 1.25rem;
    margin-top: 1rem;
}

.era-year {
    display: block;
    color: var(--c64-grey);
    font-size: 0.9375rem;
}

/* Pixel Sprite Container - Base 64x64 grid */
.pixel-sprite {
    width: 128px;
    height: 128px;
    margin: 1rem 0;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.sprite-container {
    width: 100%;
    height: 100%;
    position: relative;
}

/* CPU Chip Sunrise Sprite - Pure CSS Pixel Art */
.cpu-chip .sprite-container {
    background: 
       
        /* Chip body */
        linear-gradient(var(--c64-dark-grey), var(--c64-dark-grey)) no-repeat 24px 64px / 80px 56px,
        /* Chip pins left */
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 16px 72px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 16px 80px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 16px 88px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 16px 96px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 16px 104px / 8px 4px,
        /* Chip pins right */
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 104px 72px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 104px 80px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 104px 88px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 104px 96px / 8px 4px,
        linear-gradient(var(--c64-light-grey), var(--c64-light-grey)) no-repeat 104px 104px / 8px 4px,
        /* Chip label/die */
        linear-gradient(var(--c64-blue), var(--c64-blue)) no-repeat 40px 72px / 48px 40px,
        /* 16 label */
        linear-gradient(var(--c64-cyan), var(--c64-cyan)) no-repeat 48px 80px / 4px 24px,
        linear-gradient(var(--c64-cyan), var(--c64-cyan)) no-repeat 56px 80px / 4px 4px,
        linear-gradient(var(--c64-cyan), var(--c64-cyan)) no-repeat 56px 92px / 4px 4px,
        linear-gradient(var(--c64-cyan), var(--c64-cyan)) no-repeat 56px 100px / 12px 4px,
        linear-gradient(var(--c64-cyan), var(--c64-cyan)) no-repeat 64px 80px / 4px 24px,
        linear-gradient(var(--c64-cyan), var(--c64-cyan)) no-repeat 72px 80px / 4px 24px;
}

/* Computer Icons from Sprite Sheet */
/* Sprite positioning handled by JavaScript (sprites.js) */
.computer-icon {
    width: 70px;
    height: 44px;
    background-image: url('/static/computers.png');
    background-repeat: no-repeat;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    flex-shrink: 0;
}

.computer-icon-large {
    /* Width and height set dynamically by JS to actual sprite size */
    background-image: url('/static/computers.png');
    background-repeat: no-repeat;
    background-color: #000000;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    padding: 20px;
    border-radius: 8px;
}

/* ======================================
   UNIFIED TWO-PANEL LAYOUT SYSTEM
   
   Design Philosophy:
   All screens follow a consistent two-panel layout:
   - Main workspace: Two equal 50% panels side-by-side
   - Full available vertical height
   - Information section below (multi-column for wide screens)
   - Responsive: stacks vertically on narrow screens
   ====================================== */

/* Main workspace container - fills available height */
.workspace {
    display: flex;
    gap: 20px;
    padding: 20px;
    min-height: calc(100vh - 140px);  /* Account for header + footer */
    box-sizing: border-box;
}

/* Left panel - 50% width */
.workspace-primary {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
}

/* Right panel - 50% width */
.workspace-secondary {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
}

/* Panel inner content wrapper */
.panel-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid var(--c64-light-blue);
    border-radius: 8px;
    padding: 15px;
    overflow: hidden;
}

/* Panel header with title and controls */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 12px;
    flex-shrink: 0;
}

.panel-header h2 {
    color: var(--c64-cyan);
    font-size: 1rem;
    margin: 0;
}

/* Panel body - fills remaining space */
.panel-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

/* Panel footer for controls below content */
.panel-footer {
    margin-top: 12px;
    flex-shrink: 0;
}

/* Control bar for buttons/selectors */
.control-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.control-bar .label {
    color: var(--c64-grey);
    font-size: 0.8rem;
}

/* Information section below workspace - multi-column layout */
.info-section-below {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
}

.info-section-below h2 {
    color: var(--c64-cyan);
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.info-section-below > p {
    color: var(--c64-light-grey);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 25px;
    line-height: 1.6;
}

/* Multi-column content within info section */
.info-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.info-column {
    background: rgba(26, 26, 46, 0.8);
    border-radius: 8px;
    padding: 20px;
}

.info-column h3 {
    color: var(--c64-yellow);
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.info-column p {
    color: var(--c64-light-grey);
    line-height: 1.6;
    margin-bottom: 10px;
}

.info-column ul {
    margin: 10px 0 10px 20px;
    color: var(--c64-light-grey);
}

.info-column li {
    margin-bottom: 8px;
}

.info-column code {
    background: #2a2a4a;
    padding: 2px 6px;
    border-radius: 3px;
    color: var(--c64-cyan);
    font-size: 0.9em;
}

/* Responsive: Stack panels vertically on narrow screens */
@media (max-width: 1024px) {
    .workspace {
        flex-direction: column;
        min-height: auto;
        padding: 15px;
    }
    
    .workspace-primary,
    .workspace-secondary {
        flex: none;
        width: 100%;
        min-height: 400px;
    }
    
    .info-columns {
        grid-template-columns: 1fr;
    }
}

/* ======================================
   C64 EMULATOR PAGE
   ====================================== */

.c64-page {
    display: flex;
    gap: 20px;
    padding: 20px 30px 20px 20px;
    height: calc(100vh - 80px);
    box-sizing: border-box;
}

/* Emulator column - left side (50%) */
.c64-emulator-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 0;
}

.c64-emulator-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.c64-title {
    color: #fff;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

#screen {
    background: #4040b0;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    /* Match emulator.js: 272 * 2 = 544px height, 4:3 aspect = 725px width */
    width: 725px;
    max-width: 725px;
    height: 544px;
    transition: box-shadow 0.2s, transform 0.2s;
}

#screen.drag-over {
    box-shadow: 0 0 30px rgba(116, 187, 252, 0.8), 0 0 10px rgba(116, 187, 252, 0.5) inset;
    transform: scale(1.01);
}

.c64-controls {
    margin-top: 15px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.c64-controls button {
    background: #444;
    color: #fff;
    border: 1px solid #666;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 3px;
    font-size: 0.875rem;
    transition: background 0.2s;
}

.c64-controls button:hover {
    background: #555;
}

.c64-controls button.reset-btn {
    background: #b71c1c;
    border-color: #d32f2f;
}

.c64-controls button.reset-btn:hover {
    background: #c62828;
}

.c64-controls button.mute-btn {
    background: #1b5e20;
    border-color: #2e7d32;
}

.c64-controls button.mute-btn:hover {
    background: #2e7d32;
}

.c64-controls button.mute-btn.muted {
    background: #555;
    border-color: #777;
}

.c64-controls button.mute-btn.muted:hover {
    background: #666;
}

.c64-joystick-controls {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.c64-joystick-controls .joystick-label {
    color: #aaa;
    font-size: 0.8rem;
    margin-right: 4px;
}

.c64-joystick-controls .joystick-hint {
    color: #888;
    font-size: 0.7rem;
    margin-left: 4px;
}

.c64-joystick-controls button {
    background: #2e4a2e;
    color: #9f9;
    border: 1px solid #4a7a4a;
    padding: 6px 16px;
    cursor: pointer;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: bold;
    transition: background 0.2s, box-shadow 0.2s;
}

.c64-joystick-controls button:hover {
    background: #3e5a3e;
}

.c64-joystick-controls button.active {
    background: #4a8a4a;
    box-shadow: 0 0 8px #6c6;
    border-color: #6c6;
}

.c64-cartridges {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.c64-cartridges .cartridge-label {
    color: #aaa;
    font-size: 0.8rem;
    margin-right: 4px;
}

.c64-cartridges button {
    background: #1a237e;
    color: #fff;
    border: 1px solid #3949ab;
    padding: 6px 12px;
    cursor: pointer;
    border-radius: 3px;
    font-size: 0.75rem;
    transition: background 0.2s;
}

.c64-cartridges button:hover {
    background: #283593;
}

.c64-info {
    margin-top: 15px;
    color: #ccc;
    font-size: 0.9375rem;
    text-align: center;
    max-width: 640px;
    line-height: 1.5;
}

.c64-info code {
    background: #333;
    padding: 2px 6px;
    border-radius: 3px;
    color: #4fc3f7;
}

/* Editor panel on right side (50%) */
.c64-editor-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: 100%;
    overflow: hidden;
    min-width: 0;
}

.c64-editor-panel h2 {
    color: var(--c64-cyan);
    font-size: 1.2rem;
    margin: 0 0 0.75rem 0;
}

/* Sample selector dropdown */
.sample-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.sample-selector .sample-label {
    color: #888;
    font-size: 0.875rem;
}

.sample-selector select {
    background: #252540;
    color: #fff;
    border: 1px solid #444;
    border-radius: 4px;
    padding: 8px 12px;
    font-size: 0.875rem;
    cursor: pointer;
    min-width: 200px;
}

.sample-selector select:hover {
    border-color: #666;
}

.sample-selector select:focus {
    outline: none;
    border-color: var(--c64-cyan);
}

.sample-selector select optgroup {
    background: #1a1a2e;
    color: #888;
    font-style: normal;
}

.sample-selector select option {
    background: #252540;
    color: #fff;
    padding: 4px;
}

.c64-editor-panel #basic-editor {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.c64-editor-panel .basic-editor {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.c64-editor-panel .editor-container {
    flex: 1;
    min-height: 300px;
    max-height: none;
}

/* BASIC Quick Start Guide */
.basic-quickstart,
.asm-quickstart {
    max-width: 1400px;
    margin: 40px auto;
    padding: 30px;
    background: #1a1a2e;
    border-radius: 10px;
    color: #ccc;
    line-height: 1.6;
}

.basic-quickstart h2,
.asm-quickstart h2 {
    color: #7b7bff;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.basic-quickstart h3,
.asm-quickstart h3 {
    color: #74bbfc;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.basic-quickstart h3:first-child,
.asm-quickstart h3:first-child {
    margin-top: 0;
}

.basic-quickstart p,
.asm-quickstart p {
    margin-bottom: 10px;
}

.basic-quickstart .intro-list,
.asm-quickstart .intro-list {
    margin: 10px 0 20px 20px;
}

.basic-quickstart ul,
.asm-quickstart ul {
    margin: 10px 0 10px 20px;
}

.basic-quickstart li,
.asm-quickstart li {
    margin-bottom: 8px;
}

/* Two-column layout */
.quickstart-columns {
    display: flex;
    gap: 40px;
    margin-top: 20px;
}

.quickstart-col {
    flex: 1;
    min-width: 0;
}

@media (max-width: 900px) {
    .quickstart-columns {
        flex-direction: column;
        gap: 20px;
    }
}

/* Syntax highlighted code */
.basic-quickstart code.basic-code,
.basic-quickstart pre.basic-code,
.asm-quickstart code.asm-code,
.asm-quickstart pre.asm-code {
    background: #2a2a4a;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'C64 Pro Mono', monospace;
    font-size: 0.9em;
    color: #ccc;
}

.basic-quickstart pre.basic-code,
.asm-quickstart pre.asm-code {
    padding: 12px 16px;
    margin: 10px 0;
    overflow-x: auto;
    display: block;
}

/* BASIC syntax colors */
.basic-code .keyword { color: #fff; font-weight: bold; }
.basic-code .string { color: #7fff7f; }
.basic-code .number { color: #74bbfc; }
.basic-code .variable { color: #ffff7f; }
.basic-code .line-num { color: #888; }

/* ASM syntax colors */
.asm-code .mnemonic { color: #fff; font-weight: bold; }
.asm-code .register { color: #ffff7f; }
.asm-code .number { color: #74bbfc; }
.asm-code .label { color: #7fff7f; }
.asm-code .directive { color: #ff7fff; }
.asm-code .comment { color: #888; font-style: italic; }

.basic-quickstart code,
.asm-quickstart code {
    background: #2a2a4a;
    padding: 2px 6px;
    border-radius: 3px;
    color: #74bbfc;
    font-family: 'C64 Pro Mono', monospace;
    font-size: 0.9em;
}

.basic-quickstart pre,
.asm-quickstart pre {
    background: #2a2a4a;
    padding: 12px 16px;
    border-radius: 5px;
    color: #74bbfc;
    font-family: 'C64 Pro Mono', monospace;
    font-size: 0.9em;
    overflow-x: auto;
    margin: 10px 0;
}

.basic-quickstart table.basic-commands,
.asm-quickstart table.asm-commands {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.basic-quickstart table.basic-commands th,
.basic-quickstart table.basic-commands td,
.asm-quickstart table.asm-commands th,
.asm-quickstart table.asm-commands td {
    padding: 8px 12px;
    text-align: left;
    border-bottom: 1px solid #333;
}

.basic-quickstart table.basic-commands th,
.asm-quickstart table.asm-commands th {
    background: #2a2a4a;
    color: #74bbfc;
}

.basic-quickstart table.basic-commands td:first-child,
.asm-quickstart table.asm-commands td:first-child {
    width: 140px;
}

.basic-quickstart em,
.asm-quickstart em {
    color: #888;
}

@media (max-width: 1200px) {
    .c64-page {
        flex-direction: column;
        height: auto;
    }
    
    .c64-emulator-column {
        flex: none;
        width: 100%;
    }
    
    .c64-emulator-panel {
        position: relative;
        top: 0;
    }
    
    #screen {
        width: 100%;
        max-width: 100%;
        height: auto;
        aspect-ratio: 4 / 3;
    }
    
    .c64-editor-panel {
        max-width: 100%;
        max-height: 500px;
    }
}

/* ======================================
   ASSEMBLY LAB STYLES
   ====================================== */

/* Tab navigation */
.examples-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    position: sticky;
    top: 0;
    background: linear-gradient(to bottom, #1a1a2e 0%, #1a1a2e 90%, transparent 100%);
    padding: 10px 0 15px 0;
    z-index: 11;
}

.tab-btn {
    background: #333;
    color: #aaa;
    border: 1px solid #444;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 6px 6px 0 0;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.2s;
}

.tab-btn:hover {
    background: #404040;
    color: #fff;
}

.tab-btn.active {
    background: #252540;
    color: #4fc3f7;
    border-color: #4fc3f7;
    border-bottom-color: #252540;
}

.tab-content {
    animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Register display */
.register-display {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 15px;
    background: #1a1a2e;
    border: 1px solid #444;
    border-radius: 6px;
    padding: 12px 16px;
    font-family: 'Courier New', monospace;
    max-width: 640px;
}

.register-row {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.reg-label {
    color: #888;
    font-size: 0.8125rem;
}

.reg-value {
    color: #4fc3f7;
    font-size: 0.9375rem;
    font-weight: 600;
    min-width: 50px;
}

.flags-row {
    border-top: 1px solid #333;
    padding-top: 8px;
    margin-top: 4px;
}

.flag-bit {
    display: inline-block;
    width: 20px;
    height: 20px;
    line-height: 20px;
    text-align: center;
    background: #333;
    color: #666;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
    transition: all 0.15s;
}

.flag-bit.set {
    background: #4fc3f7;
    color: #1a1a2e;
}

.flag-bit.dim {
    opacity: 0.3;
}

.status-text {
    margin-left: auto;
    color: #aaa;
    font-size: 0.8125rem;
}

/* Source line row in register display */
.source-row {
    border-top: 1px solid #333;
    padding-top: 8px;
    margin-top: 4px;
}

.source-line {
    color: #ffc832;
    font-size: 0.8125rem;
    font-family: 'Courier New', monospace;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Assembly controls */
.asm-controls {
    gap: 6px !important;
}

.asm-controls button {
    font-size: 0.8125rem !important;
    padding: 6px 12px !important;
}

.assemble-btn {
    background: #7b1fa2 !important;
    border-color: #9c27b0 !important;
}

.assemble-btn:hover {
    background: #9c27b0 !important;
}

.step-btn {
    background: #1565c0 !important;
    border-color: #1976d2 !important;
}

.step-btn:hover {
    background: #1976d2 !important;
}

.run-debug-btn {
    background: #1b5e20 !important;
    border-color: #2e7d32 !important;
}

.run-debug-btn:hover {
    background: #2e7d32 !important;
}

.pause-btn {
    background: #e65100 !important;
    border-color: #ef6c00 !important;
}

.pause-btn:hover {
    background: #ef6c00 !important;
}

/* Debugger controls row */
.debugger-controls {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
    max-width: 640px;
}

.debug-btn {
    flex: 1;
    min-width: 80px;
    padding: 8px 12px;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 4px;
    border: 2px solid;
    transition: all 0.15s;
}

.debug-btn.step-btn {
    background: #1565c0;
    border-color: #1976d2;
    color: #fff;
}

.debug-btn.step-btn:hover {
    background: #1976d2;
}

.debug-btn.run-btn {
    background: #1b5e20;
    border-color: #2e7d32;
    color: #fff;
}

.debug-btn.run-btn:hover {
    background: #2e7d32;
}

.debug-btn.pause-btn {
    background: #e65100;
    border-color: #ef6c00;
    color: #fff;
}

.debug-btn.pause-btn:hover {
    background: #ef6c00;
}

.debug-btn.reset-debug-btn {
    background: #333;
    border-color: #555;
    color: #aaa;
}

.debug-btn.reset-debug-btn:hover {
    background: #444;
    color: #fff;
}

/* Assembly intro text */
.asm-intro {
    color: #aaa;
    font-size: 0.9375rem;
    margin-bottom: 20px;
    line-height: 1.5;
}

/* Assembly editor */
.asm-editor-section {
    margin-bottom: 20px;
}

.asm-editor-section h3 {
    color: #4fc3f7;
    font-size: 0.9375rem;
    margin-bottom: 10px;
}

.asm-editor {
    width: 100%;
    height: 200px;
    background: #1a1a2e;
    border: 1px solid #444;
    border-radius: 6px;
    color: #6ab3f7;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    padding: 12px;
    resize: vertical;
    line-height: 1.5;
    box-sizing: border-box;
}

.asm-editor:focus {
    outline: none;
    border-color: #4fc3f7;
}

.asm-editor::placeholder {
    color: #555;
}

.asm-error {
    margin-top: 8px;
    padding: 8px 12px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.8125rem;
    white-space: pre-wrap;
    display: none;
}

.asm-error.error {
    display: block;
    background: #b71c1c;
    color: #fff;
    border: 1px solid #d32f2f;
}

.asm-error.success {
    display: block;
    background: #1b5e20;
    color: #fff;
    border: 1px solid #2e7d32;
}

/* Disassembly view */
.disasm-section {
    margin-bottom: 20px;
}

.disasm-section h3 {
    color: #4fc3f7;
    font-size: 0.9375rem;
    margin-bottom: 10px;
}

.disasm-view {
    background: #1a1a2e;
    border: 1px solid #444;
    border-radius: 6px;
    padding: 12px;
    font-family: 'Courier New', monospace;
    font-size: 0.8125rem;
    color: #888;
    max-height: 200px;
    overflow-y: auto;
    line-height: 1.6;
}

/* Load example button */
.load-btn {
    background: #7b1fa2;
    color: #fff;
    border: none;
    padding: 6px 14px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.8125rem;
    transition: background 0.2s;
}

.load-btn:hover {
    background: #9c27b0;
}

/* Reference cards */
.reference-card {
    background: #252540;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 12px;
    border: 1px solid #333;
}

.reference-card h4 {
    color: #fff;
    font-size: 0.9375rem;
    margin: 0 0 10px 0;
}

.instr-table,
.flags-table,
.addr-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.instr-table th,
.flags-table th,
.addr-table th {
    text-align: left;
    color: #4fc3f7;
    padding: 4px 8px;
    border-bottom: 1px solid #444;
    font-weight: 600;
    white-space: nowrap;
}

.instr-table td,
.flags-table td,
.addr-table td {
    color: #ccc;
    padding: 4px 8px;
    border-bottom: 1px solid #333;
}

.instr-table tr:last-child td,
.flags-table tr:last-child td,
.addr-table tr:last-child td {
    border-bottom: none;
}

/* ======================================
   HARDWARE SIMULATOR PAGE
   ====================================== */

/* Hardware page uses workspace layout */
.hardware-info {
    background: rgba(26, 26, 46, 0.6);
    padding: 30px;
    border-radius: 8px;
}

.hardware-info .chip-section-title {
    color: var(--c64-yellow);
    font-size: 1.3rem;
    text-align: center;
    margin: 30px 0 20px;
}

/* Canvas fills panel body */
.workspace #simCanvas {
    background-color: #352879;
    border: 4px solid #6c5eb5;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    border-radius: 8px;
    width: 100%;
    height: auto;
    flex: 1;
    min-height: 400px;
}

.bus-legend {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 15px;
    padding: 10px;
    background: rgba(0,0,0,0.3);
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--c64-light-grey);
}

.bus-legend .dot {
    width: 12px;
    height: 12px;
    display: inline-block;
    border-radius: 50%;
    margin-right: 6px;
    vertical-align: middle;
}

.bus-legend .address-dot {
    background: #ff5555;
    box-shadow: 0 0 8px #ff5555;
}

.bus-legend .data-dot {
    background: #ffff55;
    box-shadow: 0 0 8px #ffff55;
}

/* Log Panel in workspace */
.workspace .log-panel {
    background: #111;
    border: 2px solid #6c5eb5;
    border-radius: 8px;
    flex: 1;
    min-height: 200px;
    max-height: 300px;
    overflow-y: auto;
    padding: 12px;
    font-size: 0.875rem;
    color: #55ff55;
    font-family: 'VT323', 'Courier New', monospace;
    margin-bottom: 15px;
}

.log-entry {
    margin-bottom: 4px;
    line-height: 1.4;
}

.log-time {
    color: #888;
    font-size: 0.75rem;
    margin-right: 5px;
}

.scenario-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.scenario-btn {
    background: var(--c64-purple);
    color: white;
    border: 2px solid var(--c64-light-blue);
    padding: 12px 15px;
    font-family: 'VT323', 'Courier New', monospace;
    font-size: 1rem;
    cursor: pointer;
    text-align: left;
    border-radius: 4px;
    transition: all 0.2s;
}

.scenario-btn:hover {
    background: #8a7cdb;
    transform: translateX(3px);
}

.scenario-btn:active {
    transform: translateY(1px);
}

/* Info Section within workspace panel */
.workspace .info-section {
    background: var(--c64-black);
    border: 2px solid var(--c64-light-blue);
    border-radius: 8px;
    padding: 15px;
    margin-top: auto;
}

.workspace .info-section h2 {
    color: var(--c64-cyan);
    font-size: 0.875rem;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--c64-light-blue);
    padding-bottom: 8px;
}

.default-info {
    color: var(--c64-light-grey);
    font-size: 0.8125rem;
    line-height: 1.6;
}

.default-info p {
    margin-bottom: 10px;
}

.default-info strong {
    color: var(--c64-yellow);
}

/* Motherboard Section */
.motherboard-section {
    margin-bottom: 3rem;
}

.motherboard-section h2 {
    color: var(--c64-yellow);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--c64-dark-grey);
    padding-bottom: 0.5rem;
}

.motherboard-section .section-intro {
    color: var(--c64-light-grey);
    margin-bottom: 1.5rem;
}

.motherboard-image-container {
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid var(--c64-dark-grey);
    border-radius: 8px;
    padding: 1rem;
}

.motherboard-image {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* Hardware Details / Chip Reference */
.hardware-details {
    margin-top: 20px;
}

.hardware-details h2 {
    color: var(--c64-yellow);
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--c64-dark-grey);
    padding-bottom: 0.5rem;
}

.chip-section-title {
    color: var(--c64-cyan);
    font-size: 1.1rem;
    margin: 2rem 0 1rem 0;
    padding-left: 0.5rem;
    border-left: 4px solid var(--c64-light-blue);
}

.chip-section-title:first-of-type {
    margin-top: 0;
}

.chip-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.chip-card {
    background: var(--c64-black);
    border: 2px solid var(--c64-light-blue);
    border-radius: 8px;
    padding: 20px;
    transition: all 0.2s;
}

.chip-card:hover {
    border-color: var(--c64-cyan);
    transform: translateY(-2px);
}

.chip-card h3 {
    color: var(--c64-yellow);
    font-size: 1rem;
    margin-bottom: 10px;
}

.chip-card p {
    color: var(--c64-light-grey);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 12px;
}

.chip-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.chip-card li {
    color: var(--c64-light-grey);
    font-size: 0.8125rem;
    padding: 4px 0;
    border-bottom: 1px solid var(--c64-dark-grey);
}

.chip-card li:last-child {
    border-bottom: none;
}

.chip-card .label {
    color: var(--c64-cyan);
}

/* 3D Chip Container */
.chip-3d-container {
    width: 100%;
    height: 150px;
    margin-bottom: 15px;
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.1) 100%);
    cursor: grab;
}

/* Dual Chip Container (for 2 RAM chips side by side) */
.chip-3d-dual-container {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.chip-3d-dual-container .chip-3d-small {
    flex: 1;
    height: 120px;
    margin-bottom: 0;
}

.chip-3d-container:active {
    cursor: grabbing;
}

.chip-3d-container canvas {
    display: block;
    border-radius: 6px;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .simulator-container {
        flex-direction: column;
    }
    
    .controls-panel {
        width: 100%;
    }
    
    #simCanvas {
        max-width: 100%;
    }
}

/* ======================================
   MEMORY MAP PAGE
   ====================================== */

/* Memmap workspace adjustments */
.memmap-workspace .workspace-primary {
    flex: 0 0 350px;
    max-width: 350px;
}

.memmap-workspace .workspace-secondary {
    flex: 1;
}

.banking-controls-body {
    overflow-y: auto;
}

.memmap-table-panel {
    overflow: hidden;
}

.memmap-table-body {
    overflow-y: auto;
}

/* Region details panel in left column */
.region-details-panel {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 2px solid var(--c64-light-blue);
}

.region-details-panel h3 {
    color: var(--c64-cyan);
    font-size: 0.875rem;
    margin-bottom: 10px;
}

.region-details-panel .region-info h4 {
    color: var(--c64-yellow);
    font-size: 0.8rem;
    margin-bottom: 5px;
}

.region-details-panel .region-info .range {
    color: var(--c64-light-green);
    font-size: 0.75rem;
    margin-bottom: 8px;
}

.region-details-panel .region-info p {
    color: var(--c64-light-grey);
    font-size: 0.75rem;
    line-height: 1.5;
    margin-bottom: 8px;
}

.region-details-panel .current-config h4 {
    color: var(--c64-cyan);
    font-size: 0.75rem;
    margin-top: 10px;
}

.region-details-panel .config-value {
    background: rgba(0, 0, 0, 0.3);
    padding: 8px;
    border-radius: 4px;
    color: var(--c64-light-green);
    font-size: 0.75rem;
}

/* Control group styles */
.control-group {
    margin-bottom: 20px;
}

.control-group h3 {
    color: var(--c64-yellow);
    font-size: 0.8125rem;
    margin-bottom: 10px;
}

.bit-controls {
    display: flex;
    gap: 5px;
    margin-bottom: 10px;
}

.bit-btn {
    width: 40px;
    height: 40px;
    background: var(--c64-dark-grey);
    border: 2px solid var(--c64-grey);
    color: var(--c64-light-grey);
    font-size: 0.75rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.bit-btn:hover {
    border-color: var(--c64-cyan);
}

.bit-btn.active {
    background: var(--c64-green);
    border-color: var(--c64-light-green);
    color: var(--c64-black);
}

.bit-btn .bit-name {
    font-size: 0.625rem;
    margin-top: 2px;
}

.port-value {
    background: var(--c64-blue);
    padding: 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--c64-light-blue);
    margin-top: 10px;
}

.port-value code {
    color: var(--c64-yellow);
}

/* Quick presets */
.presets {
    display: grid;
    grid-template-columns: 1fr;
    gap: 5px;
}

.preset-btn {
    background: var(--c64-dark-grey);
    border: 2px solid var(--c64-grey);
    color: var(--c64-light-grey);
    padding: 10px;
    font-size: 0.75rem;
    cursor: pointer;
    border-radius: 4px;
    text-align: left;
    transition: all 0.2s;
}

.preset-btn:hover {
    background: var(--c64-grey);
    color: var(--c64-white);
}

.preset-btn.active {
    background: var(--c64-light-blue);
    border-color: var(--c64-cyan);
    color: var(--c64-black);
}

/* External signals */
.signal-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.signal-btn {
    flex: 1;
    min-width: 80px;
    padding: 10px;
    background: var(--c64-dark-grey);
    border: 2px solid var(--c64-grey);
    color: var(--c64-light-grey);
    font-size: 0.75rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.signal-btn:hover {
    border-color: var(--c64-cyan);
}

.signal-btn.active {
    background: var(--c64-red);
    border-color: var(--c64-light-red);
    color: var(--c64-white);
}

/* VIC Bank Controls */
.vic-bank-controls {
    display: flex;
    gap: 5px;
}

.vic-bank-btn {
    flex: 1;
    padding: 8px 6px;
    background: var(--c64-dark-grey);
    border: 2px solid var(--c64-grey);
    color: var(--c64-light-grey);
    font-size: 0.6875rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.vic-bank-btn:hover {
    border-color: var(--c64-cyan);
}

.vic-bank-btn.active {
    background: var(--c64-purple);
    border-color: #c080c3;
    color: var(--c64-white);
}

.vic-bank-btn .bank-num {
    font-size: 0.75rem;
}

.vic-bank-btn .bank-range {
    font-size: 0.5625rem;
    opacity: 0.7;
    margin-top: 2px;
}

/* Memory Map Display - 4KB Grid Table Layout */
.memmap-panel {
    flex: 1;
    background: var(--c64-black);
    border: 3px solid var(--c64-light-blue);
    border-radius: 8px;
    overflow: hidden;
}

.memory-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.memory-table thead th {
    background: var(--c64-dark-grey);
    color: var(--c64-cyan);
    font-size: 0.8125rem;
    padding: 10px 6px;
    text-align: center;
    border-bottom: 2px solid var(--c64-light-blue);
    font-weight: bold;
    letter-spacing: 1px;
}

.memory-table thead th.addr-header {
    width: 70px;
    border-right: 1px solid var(--c64-light-blue);
}

.memory-table thead th.cpu-header {
    width: auto;
    border-right: 1px solid var(--c64-light-blue);
}

.memory-table thead th.vic-header {
    width: 80px;
    background: #4a2d5a;
    border-right: 1px solid var(--c64-light-blue);
}

.memory-table thead th.details-header {
    width: 180px;
    background: var(--c64-dark-grey);
}

.memory-table tbody tr {
    border-bottom: 1px solid var(--c64-dark-grey);
    height: 1px;
    min-height: 60px;
}

.memory-table tbody tr:last-child {
    border-bottom: none;
}

.memory-table td {
    padding: 0;
    vertical-align: middle;
    height: 100%;
    position: relative;
}

.memory-table td.addr-cell {
    background: rgba(0,0,0,0.4);
    text-align: center;
    font-size: 0.875rem;
    color: var(--c64-light-grey);
    border-right: 1px solid var(--c64-light-blue);
    padding: 6px;
    vertical-align: middle;
}

.memory-table td.addr-cell .addr-start {
    display: block;
    color: var(--c64-cyan);
    font-size: 0.875rem;
    font-weight: bold;
}

.memory-table td.cpu-cell {
    border-right: 1px solid var(--c64-light-blue);
    border-bottom: 1px solid rgba(136, 126, 203, 0.5);
    padding: 0;
    position: relative;
}

.memory-table td.vic-cell {
    border-right: 1px solid var(--c64-light-blue);
    padding: 0;
    position: relative;
}

.memory-table td.details-cell {
    vertical-align: top;
    padding: 0;
    position: relative;
}

/* Details cells inherit region colors from CPU view */
.memory-table td.details-cell.region-ram { background: #2d5a27; }
.memory-table td.details-cell.region-basic { background: #5a2d5a; }
.memory-table td.details-cell.region-kernal { background: #5a5a2d; }
.memory-table td.details-cell.region-io { background: #5a2d2d; }
.memory-table td.details-cell.region-charrom { background: #2d5a5a; }
.memory-table td.details-cell.region-cart-lo { background: #5a4a2d; }
.memory-table td.details-cell.region-cart-hi { background: #4a5a2d; }

/* CPU cells inherit region colors */
.memory-table td.cpu-cell.region-ram { background: #2d5a27; }
.memory-table td.cpu-cell.region-basic { background: #5a2d5a; }
.memory-table td.cpu-cell.region-kernal { background: #5a5a2d; }
.memory-table td.cpu-cell.region-io { background: #5a2d2d; }
.memory-table td.cpu-cell.region-charrom { background: #2d5a5a; }
.memory-table td.cpu-cell.region-cart-lo { background: #5a4a2d; }
.memory-table td.cpu-cell.region-cart-hi { background: #4a5a2d; }

/* Memory region cells that fill table cells */
.memory-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 60px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #2d5a27;
    text-align: center;
    padding: 8px;
    box-sizing: border-box;
}

.memory-table td > .memory-cell {
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

/* CPU cells should not be absolute - let content determine row height */
.memory-table td.cpu-cell > .memory-cell {
    position: relative;
    min-height: 60px;
    height: auto;
}

.memory-cell:hover {
    filter: brightness(1.2);
}

.memory-cell .region-name {
    font-size: 0.875rem;
    font-weight: bold;
    line-height: 1.3;
    letter-spacing: 0.5px;
}

.memory-cell .region-size {
    font-size: 0.875rem;
    opacity: 0.8;
    letter-spacing: 0.3px;
}

/* CPU cells: horizontal text layout */
.memory-table td.cpu-cell .memory-cell > div {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.memory-table td.cpu-cell .memory-cell .region-size {
    margin-top: 0;
}

/* VIC empty regions */
.region-vic-empty {
    background: #1a1a1a;
}

.region-vic-empty:hover {
    filter: none;
    cursor: default;
}

.vic-inactive {
    color: var(--c64-grey);
    font-size: 0.875rem;
    font-style: normal;
}

/* VIC visible regions */
.vic-visible {
    border-left: 3px solid var(--c64-cyan);
}

/* Details column cells grid */
.details-cells {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    padding: 4px;
    align-items: flex-start;
    align-content: flex-start;
    min-height: 100%;
}

.mem-cell {
    min-width: 6px;
    min-height: 6px;
    width: 6px;
    height: 6px;
    background: rgba(255,255,255,0.15);
    border-radius: 1px;
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

/* Proportional sizing for ranges */
.mem-cell.size-small { width: 6px; height: 6px; }
.mem-cell.size-medium { width: 10px; height: 10px; }
.mem-cell.size-large { width: 14px; height: 14px; }
.mem-cell.size-xlarge { width: 20px; height: 20px; }

.mem-cell:hover {
    background: var(--c64-yellow);
    transform: scale(1.5);
    z-index: 10;
    position: relative;
}

.mem-cell.active {
    background: var(--c64-cyan);
}

/* Color coding for different entry types */
.mem-cell.type-register { background: rgba(255, 100, 100, 0.5); }
.mem-cell.type-vector { background: rgba(100, 255, 100, 0.5); }
.mem-cell.type-flag { background: rgba(100, 100, 255, 0.5); }
.mem-cell.type-buffer { background: rgba(255, 255, 100, 0.5); }
.mem-cell:hover.type-register { background: #ff6666; }
.mem-cell:hover.type-vector { background: #66ff66; }
.mem-cell:hover.type-flag { background: #6666ff; }
.mem-cell:hover.type-buffer { background: #ffff66; }

/* Region colors */
.region-ram { background: #2d5a27; color: #9ae29b; }
.region-basic { background: #5a2d5a; color: #d4a5d4; }
.region-kernal { background: #5a5a2d; color: #d4d4a5; }
.region-io { background: #5a2d2d; color: #d4a5a5; }
.region-charrom { background: #2d5a5a; color: #a5d4d4; }
.region-cart-lo { background: #5a4a2d; color: #d4c4a5; }
.region-cart-hi { background: #4a5a2d; color: #c4d4a5; }

/* VIC-specific region colors */
.region-vic-screen { background: #4a2d5a; color: #c4a5d4; }
.region-vic-chars { background: #2d4a5a; color: #a5c4d4; }
.region-vic-bitmap { background: #5a3d2d; color: #d4b4a5; }
.region-vic-sprites { background: #3d5a2d; color: #b4d4a5; }

/* Stack cell layout */
.stack-cell-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100%;
}

.stack-info {
    text-align: left;
}

/* Stack direction arrow */
.stack-arrow {
    display: flex;
    align-items: center;
    font-size: 0.625rem;
    color: var(--c64-yellow);
    font-weight: normal;
    white-space: nowrap;
}

.stack-arrow::before {
    content: '↓';
    margin-right: 4px;
    font-size: 1.4rem;
    font-weight: bold;
}

/* Memory Map Info Panel */
.memmap-page .info-panel {
    width: 300px;
    background: var(--c64-black);
    border: 3px solid var(--c64-light-blue);
    border-radius: 8px;
    padding: 15px;
    position: sticky;
    top: 80px;
    align-self: flex-start;
}

.memmap-page .info-panel h2 {
    color: var(--c64-cyan);
    font-size: 0.9375rem;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--c64-light-blue);
    padding-bottom: 8px;
}

.region-info {
    display: none;
}

.region-info.active {
    display: block;
}

.region-info h3 {
    color: var(--c64-yellow);
    font-size: 0.875rem;
    margin-bottom: 10px;
}

.region-info .range {
    color: var(--c64-light-grey);
    font-size: 0.8125rem;
    margin-bottom: 15px;
}

.region-info p {
    color: var(--c64-light-blue);
    font-size: 0.8125rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.region-info .details {
    background: var(--c64-blue);
    padding: 10px;
    border-radius: 4px;
}

.region-info .details h4 {
    color: var(--c64-cyan);
    font-size: 0.8125rem;
    margin-bottom: 8px;
}

.region-info .details ul {
    list-style: none;
    padding: 0;
}

.region-info .details li {
    color: var(--c64-light-grey);
    font-size: 0.75rem;
    padding: 4px 0;
    border-bottom: 1px solid var(--c64-dark-grey);
}

.region-info .details li:last-child {
    border-bottom: none;
}

.region-info .details .label {
    color: var(--c64-yellow);
}

/* Current config display */
.current-config {
    background: var(--c64-blue);
    padding: 10px;
    border-radius: 4px;
    margin-top: 15px;
}

.current-config h4 {
    color: var(--c64-cyan);
    font-size: 0.8125rem;
    margin-bottom: 8px;
}

.config-value {
    color: var(--c64-yellow);
    font-size: 0.75rem;
}

/* Animation for region changes */
@keyframes regionFlash {
    0% { 
        filter: brightness(2.5);
        transform: scale(1.02);
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    }
    50% {
        filter: brightness(1.8);
        transform: scale(1.01);
        box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    }
    100% { 
        filter: brightness(1);
        transform: scale(1);
        box-shadow: none;
    }
}

.memory-region.changed {
    animation: regionFlash 0.6s ease-out;
    position: relative;
    z-index: 10;
}

/* Memory Map Legend */
.memory-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
    padding: 10px;
    background: rgba(0,0,0,0.3);
    border-radius: 4px;
}

.memory-legend .legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.6875rem;
    color: var(--c64-light-grey);
}

.memory-legend .legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

/* ==========================================
   SID PAGE STYLES
   ========================================== */

/* SID workspace adjustments */
.sid-workspace .workspace-primary,
.sid-workspace .workspace-secondary {
    flex: 1;
}

.sid-workspace .panel-header {
    flex-wrap: wrap;
}

.sid-workspace .panel-header h2 {
    margin: 0;
}

/* SID intro row with text and 3D chip */
.sid-intro-row {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 1.5rem;
    max-width: 50%;
    margin-left: auto;
    margin-right: auto;
}

.sid-intro-text {
    flex: 1;
}

.sid-intro-text h2 {
    margin-top: 0;
}

#sid-3d-container-mini {
    width: 150px;
    height: 130px;
    flex-shrink: 0;
}

.sid-monitor-body {
    gap: 10px;
}

.sid-player-body {
    gap: 12px;
}

.page-header-with-chip .page-header {
    flex: 1;
    margin-bottom: 0;
}

#sid-3d-container {
    width: 400px;
    height: 350px;
    flex-shrink: 0;
}

#sid-3d-container canvas {
    cursor: grab;
}

#sid-3d-container canvas:active {
    cursor: grabbing;
}

@media (max-width: 768px) {
    .page-header-with-chip {
        flex-direction: column;
        text-align: center;
    }
    
    #sid-3d-container {
        width: 100%;
        max-width: 300px;
    }
}

.sid-overview {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.sid-intro h2 {
    color: var(--c64-yellow);
    margin-bottom: 1rem;
}

.sid-intro p {
    color: var(--c64-light-grey);
    line-height: 1.8;
}

.chip-visual .chip-package {
    background: var(--c64-black);
    border: 3px solid var(--c64-light-grey);
    padding: 2rem 3rem;
    text-align: center;
    position: relative;
}

.sid-architecture,
.sid-waveforms,
.sid-envelope,
.sid-filter,
.sid-registers,
.sid-versions,
.sid-legacy {
    margin-bottom: 3rem;
}

.sid-page h2 {
    color: var(--c64-yellow);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--c64-dark-grey);
    padding-bottom: 0.5rem;
}

.section-intro {
    color: var(--c64-light-grey);
    margin-bottom: 1.5rem;
}

.voice-grid,
.waveform-grid,
.adsr-grid,
.filter-grid,
.version-grid {
    display: grid;
    gap: 1.5rem;
}

.voice-grid {
    grid-template-columns: repeat(3, 1fr);
}

.waveform-grid {
    grid-template-columns: repeat(4, 1fr);
}

.adsr-grid {
    grid-template-columns: repeat(4, 1fr);
}

.filter-grid {
    grid-template-columns: repeat(4, 1fr);
}

.version-grid {
    grid-template-columns: repeat(2, 1fr);
}

.voice-card,
.waveform-card,
.adsr-card,
.filter-card,
.version-card {
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid var(--c64-dark-grey);
    padding: 1.5rem;
    border-radius: 4px;
}

.voice-card h3,
.waveform-card h3,
.adsr-card h3,
.filter-card h3,
.version-card h3 {
    color: var(--c64-cyan);
    margin-bottom: 0.5rem;
}

.voice-card p,
.waveform-card p,
.adsr-card p,
.filter-card p {
    color: var(--c64-light-grey);
    font-size: 0.9rem;
}

.voice-registers .register {
    display: inline-block;
    background: var(--c64-dark-grey);
    color: var(--c64-light-green);
    padding: 0.25rem 0.5rem;
    font-family: monospace;
    margin-bottom: 0.75rem;
    border-radius: 2px;
}

.wave-icon {
    width: 60px;
    height: 40px;
    margin-bottom: 1rem;
    border: 1px solid var(--c64-dark-grey);
    position: relative;
    overflow: hidden;
}

.wave-icon.triangle::before {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 5px;
    border-left: 25px solid transparent;
    border-right: 25px solid transparent;
    border-bottom: 30px solid var(--c64-light-green);
}

.wave-icon.sawtooth::before {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 5px;
    width: 0;
    height: 0;
    border-left: 50px solid var(--c64-light-green);
    border-top: 30px solid transparent;
}

.wave-icon.pulse::before {
    content: '';
    position: absolute;
    bottom: 10px;
    left: 10px;
    width: 20px;
    height: 20px;
    background: var(--c64-light-green);
}

.wave-icon.pulse::after {
    content: '';
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 10px;
    height: 20px;
    background: var(--c64-light-green);
}

.wave-icon.noise {
    background: repeating-linear-gradient(
        90deg,
        var(--c64-light-green) 0px,
        var(--c64-light-green) 2px,
        transparent 2px,
        transparent 4px
    ),
    repeating-linear-gradient(
        0deg,
        var(--c64-light-green) 0px,
        var(--c64-light-green) 2px,
        transparent 2px,
        transparent 6px
    );
    opacity: 0.7;
}

.adsr-diagram {
    background: rgba(0, 0, 0, 0.4);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
}

.adsr-visual {
    width: 100%;
    max-width: 500px;
    display: block;
    margin: 0 auto;
}

.filter-controls {
    margin-top: 1.5rem;
    display: flex;
    gap: 2rem;
}

.control-info {
    color: var(--c64-light-grey);
}

.control-info .label {
    color: var(--c64-cyan);
}

.control-info .value {
    color: var(--c64-light-green);
    font-family: monospace;
}

.register-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(0, 0, 0, 0.4);
}

.register-table th,
.register-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--c64-dark-grey);
}

.register-table th {
    background: var(--c64-dark-grey);
    color: var(--c64-yellow);
}

.register-table td:first-child {
    font-family: monospace;
    color: var(--c64-light-green);
}

.register-table td:nth-child(2) {
    color: var(--c64-cyan);
}

.register-table td:nth-child(3) {
    color: var(--c64-light-grey);
}

.register-table tr.spacer td {
    padding: 0.25rem;
    background: transparent;
}

.version-card .version-years {
    color: var(--c64-light-green);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.version-card ul {
    list-style: none;
    padding: 0;
}

.version-card li {
    color: var(--c64-light-grey);
    padding: 0.25rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.version-card li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--c64-cyan);
}

.sid-legacy p {
    color: var(--c64-light-grey);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.famous-composers {
    background: rgba(0, 0, 0, 0.4);
    padding: 1.5rem;
    border-radius: 4px;
}

.famous-composers h3 {
    color: var(--c64-cyan);
    margin-bottom: 1rem;
}

.composer-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.composer-list span {
    background: var(--c64-dark-grey);
    color: var(--c64-light-green);
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

/* ==========================================
   LIBRARY PAGE STYLES
   ========================================== */

.library-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.library-page .page-header {
    text-align: center;
    margin-bottom: 2rem;
}

.library-page .page-header h1 {
    color: var(--c64-light-green);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.library-page .page-header p {
    color: var(--c64-light-grey);
    font-size: 1.1rem;
}

.library-intro {
    text-align: center;
    color: var(--c64-light-grey);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.book-card {
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid var(--c64-dark-grey);
    padding: 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.2s ease;
    display: block;
}

.book-card:hover {
    border-color: var(--c64-light-blue);
    transform: translateY(-2px);
    background: rgba(0, 0, 0, 0.6);
}

.book-card .book-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.book-card h3 {
    color: var(--c64-cyan);
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.book-card .book-author {
    color: var(--c64-light-green);
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
}

.book-card .book-desc {
    color: var(--c64-light-grey);
    font-size: 0.85rem;
    line-height: 1.5;
}

.library-note {
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid var(--c64-dark-grey);
    padding: 2rem;
    border-radius: 4px;
    text-align: center;
}

.library-note h2 {
    color: var(--c64-yellow);
    margin-bottom: 1rem;
}

.library-note p {
    color: var(--c64-light-grey);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==========================================
   ABOUT PAGE STYLES
   ========================================== */

.about-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.about-page .page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.about-page .page-header h1 {
    color: var(--c64-light-green);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.about-page .page-header p {
    color: var(--c64-light-grey);
    font-size: 1.1rem;
}

.about-content {
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid var(--c64-dark-grey);
    border-radius: 4px;
    padding: 2rem;
}

.about-section {
    margin-bottom: 2.5rem;
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-section h2 {
    color: var(--c64-yellow);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--c64-dark-grey);
    padding-bottom: 0.5rem;
}

.about-section p {
    color: var(--c64-light-grey);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.about-section p:last-child {
    margin-bottom: 0;
}

.mission-points {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.mission-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.mission-icon {
    font-size: 2rem;
    line-height: 1;
}

.mission-item h3 {
    color: var(--c64-cyan);
    margin-bottom: 0.5rem;
}

.mission-item p {
    color: var(--c64-light-grey);
    margin: 0;
}

.author-section .author-card {
    background: rgba(0, 0, 0, 0.3);
    padding: 1.5rem;
    border-radius: 4px;
}

.author-info p {
    margin-bottom: 1rem;
}

.author-info strong {
    color: var(--c64-cyan);
}

.author-info blockquote {
    border-left: 3px solid var(--c64-light-green);
    padding-left: 1.5rem;
    margin: 1.5rem 0 0;
    font-style: italic;
}

.author-info blockquote p {
    color: var(--c64-light-blue);
    margin-bottom: 0.5rem;
}

.author-info blockquote cite {
    color: var(--c64-light-green);
    font-style: normal;
}

.tech-list {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.tech-list li {
    color: var(--c64-light-grey);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.tech-list li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--c64-cyan);
}

.tech-label {
    color: var(--c64-cyan);
}

.ready-message {
    color: var(--c64-light-blue);
    font-size: 1.25rem;
    margin-top: 1.5rem;
}

.cursor-blink {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ==========================================
   SID Player Styles
   ========================================== */

.sid-player-section {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.6));
    border: 2px solid var(--c64-light-blue);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 3rem;
}

.sid-player-section h2 {
    color: var(--c64-light-green);
    text-align: center;
    margin-bottom: 0.5rem;
}

.sid-player-section .section-intro {
    text-align: center;
    color: var(--c64-light-grey);
    margin-bottom: 1.5rem;
}

.sid-player-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Player Info & Controls */
.player-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--c64-black);
    padding: 1rem 1.5rem;
    border: 1px solid var(--c64-light-blue);
    border-radius: 4px;
}

.song-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.song-title {
    color: var(--c64-light-green);
    font-size: 1.25rem;
    font-weight: bold;
}

.song-author {
    color: var(--c64-cyan);
    font-size: 0.9rem;
}

.song-released {
    color: var(--c64-light-grey);
    font-size: 0.8rem;
}

.song-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.song-selector label {
    color: var(--c64-light-grey);
    font-size: 0.9rem;
}

.song-select {
    background: var(--c64-dark-grey);
    color: var(--c64-light-blue);
    border: 2px solid var(--c64-light-blue);
    padding: 0.4rem 0.75rem;
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    min-width: 180px;
}

.song-select:hover {
    background: var(--c64-blue);
}

.song-select:focus {
    outline: none;
    border-color: var(--c64-cyan);
}

.song-select option {
    background: var(--c64-dark-grey);
    color: var(--c64-light-blue);
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.player-btn {
    background: var(--c64-dark-grey);
    color: var(--c64-light-blue);
    border: 2px solid var(--c64-light-blue);
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.player-btn:hover {
    background: var(--c64-light-blue);
    color: var(--c64-black);
}

.player-btn.play-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1.25rem;
}

.player-btn.playing {
    background: var(--c64-light-green);
    border-color: var(--c64-light-green);
    color: var(--c64-black);
}

.track-info {
    color: var(--c64-yellow);
    font-size: 0.9rem;
    margin-left: 0.5rem;
}

.frame-counter {
    color: var(--c64-cyan);
    font-size: 0.85rem;
    margin-left: 1rem;
    padding: 0.25rem 0.5rem;
    background: var(--c64-black);
    border: 1px solid var(--c64-dark-grey);
    border-radius: 3px;
    font-family: 'Consolas', 'Monaco', monospace;
}

/* Voice Visualizer */
.voice-visualizer {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.voice-panel {
    background: var(--c64-black);
    border: 1px solid var(--c64-dark-grey);
    padding: 1rem;
    border-radius: 4px;
    position: relative;
}

.voice-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--c64-dark-grey);
}

.voice-label {
    color: var(--c64-light-blue);
    font-weight: bold;
}

.voice-waveform {
    background: var(--c64-purple);
    color: var(--c64-white);
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 2px;
}

.voice-meters {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.meter-row {
    display: grid;
    grid-template-columns: 40px 1fr 50px;
    align-items: center;
    gap: 0.5rem;
}

.meter-label {
    color: var(--c64-light-grey);
    font-size: 0.75rem;
}

.meter-bar {
    height: 12px;
    background: var(--c64-dark-grey);
    border-radius: 2px;
    overflow: hidden;
}

.meter-fill {
    height: 100%;
    width: 0%;
    transition: width 0.05s ease-out;
    border-radius: 2px;
}

.freq-fill {
    background: linear-gradient(90deg, var(--c64-cyan), var(--c64-light-blue));
}

.env-fill {
    background: linear-gradient(90deg, var(--c64-green), var(--c64-light-green));
}

.meter-value {
    color: var(--c64-yellow);
    font-size: 0.7rem;
    text-align: right;
    font-family: monospace;
}

.adsr-display {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.adsr-label {
    color: var(--c64-light-grey);
    font-size: 0.7rem;
}

.adsr-label span {
    color: var(--c64-cyan);
}

.gate-indicator {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--c64-dark-grey);
    color: var(--c64-grey);
    padding: 0.15rem 0.35rem;
    font-size: 0.6rem;
    border-radius: 2px;
    transition: all 0.1s ease;
}

.gate-indicator.active {
    background: var(--c64-light-green);
    color: var(--c64-black);
    box-shadow: 0 0 8px var(--c64-light-green);
}

/* Filter Display */
.filter-display {
    background: var(--c64-black);
    border: 1px solid var(--c64-dark-grey);
    padding: 1rem;
    border-radius: 4px;
}

.filter-header {
    color: var(--c64-yellow);
    font-weight: bold;
    margin-bottom: 0.75rem;
    text-align: center;
}

.filter-info {
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: 1.5rem;
    align-items: center;
}

.filter-param {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.filter-param .param-label {
    color: var(--c64-light-grey);
    font-size: 0.75rem;
}

.filter-bar {
    height: 10px;
}

.cutoff-fill {
    background: linear-gradient(90deg, var(--c64-orange), var(--c64-yellow));
}

.res-fill {
    background: linear-gradient(90deg, var(--c64-purple), var(--c64-light-red));
}

.param-value {
    color: var(--c64-yellow);
    font-size: 0.7rem;
    font-family: monospace;
}

.filter-modes, .filter-voices {
    display: flex;
    gap: 0.5rem;
}

.filter-mode, .filter-voice {
    background: var(--c64-dark-grey);
    color: var(--c64-grey);
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 2px;
    transition: all 0.1s ease;
}

.filter-mode.active, .filter-voice.active {
    background: var(--c64-cyan);
    color: var(--c64-black);
}

.volume-display {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--c64-dark-grey);
}

.volume-meter {
    display: flex;
    gap: 3px;
    flex: 1;
}

.volume-bar {
    flex: 1;
    height: 20px;
    background: var(--c64-dark-grey);
    border-radius: 2px;
    transition: background 0.1s ease;
}

.volume-bar.active:nth-child(-n+5) {
    background: var(--c64-green);
}

.volume-bar.active:nth-child(n+6):nth-child(-n+10) {
    background: var(--c64-yellow);
}

.volume-bar.active:nth-child(n+11) {
    background: var(--c64-light-red);
}

/* Register Activity */
.register-activity {
    background: var(--c64-black);
    border: 1px solid var(--c64-dark-grey);
    padding: 0.75rem;
    border-radius: 4px;
}

.register-header {
    color: var(--c64-yellow);
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-align: center;
    font-size: 0.85rem;
}

.register-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.3rem;
}

.register-cell {
    background: var(--c64-dark-grey);
    padding: 0.25rem;
    border-radius: 2px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    transition: background 0.1s ease;
}

.register-cell.updated {
    background: var(--c64-light-blue);
}

.reg-name {
    color: var(--c64-light-grey);
    font-size: 0.6rem;
}

.reg-value {
    color: var(--c64-light-green);
    font-family: monospace;
    font-size: 0.8rem;
}

/* Responsive adjustments for new pages */
@media (max-width: 768px) {
    .sid-overview {
        grid-template-columns: 1fr;
    }
    
    .voice-grid,
    .waveform-grid,
    .adsr-grid,
    .filter-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .version-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .book-grid {
        grid-template-columns: 1fr;
    }
    
    .mission-item {
        flex-direction: column;
        text-align: center;
    }
    
    /* SID Player responsive */
    .voice-visualizer {
        grid-template-columns: 1fr;
    }
    
    .filter-info {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .player-info {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .register-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .sid-selector {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .voice-grid,
    .waveform-grid,
    .adsr-grid,
    .filter-grid {
        grid-template-columns: 1fr;
    }
}

/* SID Song Selector - Horizontal */
.sid-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

/* SID Song Selector - Horizontal Grid */
.sid-selector-horizontal {
    margin-bottom: 1rem;
}

.sid-btn-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

/* SID Song Selector - Vertical */
.sid-selector-vertical {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.sid-selector-vertical .sid-btn {
    width: 100%;
    text-align: left;
    padding: 0.75rem 1rem;
}

.selector-label {
    color: var(--c64-light-grey);
    font-size: 0.8rem;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
    letter-spacing: 0.05em;
}

/* Song Info - Vertical */
.song-info-vertical {
    background: var(--c64-black);
    border: 1px solid var(--c64-light-blue);
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
}

.song-info-vertical .song-title {
    color: var(--c64-light-green);
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.song-info-vertical .song-author {
    color: var(--c64-cyan);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.song-info-vertical .song-released {
    color: var(--c64-light-grey);
    font-size: 0.8rem;
}

/* Track Section */
.track-section {
    margin-bottom: 1rem;
}

/* Player Controls - Horizontal */
.player-controls-horizontal {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.player-controls-horizontal .player-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    text-align: center;
}

.player-controls-horizontal .play-btn {
    background: var(--c64-light-green);
    border-color: var(--c64-light-green);
    color: var(--c64-black);
    font-weight: bold;
}

.player-controls-horizontal .play-btn:hover {
    background: var(--c64-cyan);
    border-color: var(--c64-cyan);
}

.player-controls-horizontal .play-btn.playing {
    background: var(--c64-orange);
    border-color: var(--c64-orange);
}

.sid-player-body > .frame-counter {
    color: var(--c64-cyan);
    font-size: 0.85rem;
    text-align: center;
    padding: 0.5rem;
    background: var(--c64-black);
    border: 1px solid var(--c64-dark-grey);
    border-radius: 4px;
}

/* Player Controls - Vertical */
.player-controls-vertical {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.player-controls-vertical .player-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    text-align: center;
}

.player-controls-vertical .play-btn {
    background: var(--c64-light-green);
    border-color: var(--c64-light-green);
    color: var(--c64-black);
    font-weight: bold;
    padding: 1rem;
    font-size: 1.1rem;
}

.player-controls-vertical .play-btn:hover {
    background: var(--c64-cyan);
    border-color: var(--c64-cyan);
}

.player-controls-vertical .play-btn.playing {
    background: var(--c64-orange);
    border-color: var(--c64-orange);
}

.player-controls-vertical .frame-counter {
    color: var(--c64-cyan);
    font-size: 0.85rem;
    text-align: center;
    padding: 0.5rem;
    background: var(--c64-black);
    border: 1px solid var(--c64-dark-grey);
    border-radius: 4px;
}

.sid-btn {
    background: var(--c64-dark-grey);
    color: var(--c64-light-blue);
    border: 2px solid var(--c64-light-blue);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.sid-btn:hover {
    background: var(--c64-light-blue);
    color: var(--c64-black);
}

.sid-btn.active {
    background: var(--c64-light-blue);
    color: var(--c64-black);
    font-weight: bold;
}

/* Track Selector */
.track-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin: 0.75rem 0;
    padding: 0.5rem;
    background: var(--c64-black);
    border: 1px solid var(--c64-dark-grey);
    border-radius: 4px;
}

.track-btn {
    background: var(--c64-dark-grey);
    color: var(--c64-cyan);
    border: 1px solid var(--c64-cyan);
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    min-width: 2rem;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

.track-btn:hover {
    background: var(--c64-cyan);
    color: var(--c64-black);
}

.track-btn.active {
    background: var(--c64-cyan);
    color: var(--c64-black);
    font-weight: bold;
}

/* ========================================
   BASIC Tutorial Styles
   ======================================== */

.tutorial-intro {
    background: linear-gradient(135deg, #1a1a2e, #2a2a4e);
    border: 1px solid var(--c64-cyan);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.tutorial-intro p {
    margin: 0;
    line-height: 1.6;
}

.tutorial-section {
    background: rgba(26, 26, 46, 0.8);
    border: 1px solid #333;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.lesson-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #444;
    padding-bottom: 1rem;
}

.lesson-number {
    background: var(--c64-cyan);
    color: var(--c64-black);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.lesson-header h2 {
    margin: 0;
    color: #fff;
    font-size: 1.3rem;
}

.concept-box {
    background: rgba(79, 195, 247, 0.1);
    border-left: 4px solid var(--c64-cyan);
    padding: 1rem 1.5rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}

.concept-box strong {
    color: var(--c64-cyan);
}

.try-yourself {
    background: rgba(155, 89, 182, 0.15);
    border: 1px solid #9b59b6;
    border-radius: 8px;
    padding: 1rem 1.5rem;
    margin: 1rem 0;
}

.try-yourself h4 {
    color: #9b59b6;
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
}

.try-yourself p, .try-yourself ul {
    margin: 0.5rem 0;
}

.try-yourself ul {
    padding-left: 1.5rem;
}

.try-yourself li {
    margin: 0.25rem 0;
}

/* Next Steps Navigation */
.next-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
}

.next-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, #1a1a2e, #2a2a4e);
    border: 1px solid var(--c64-cyan);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: #fff;
    transition: all 0.2s ease;
    flex: 1;
    min-width: 200px;
}

.next-link:hover {
    background: var(--c64-cyan);
    color: var(--c64-black);
    transform: translateY(-2px);
}

.next-icon {
    font-size: 1.5rem;
}

.next-text strong {
    display: block;
    font-size: 1rem;
}

.next-text span {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* Bonus Section */
.bonus-section {
    background: linear-gradient(135deg, rgba(155, 89, 182, 0.2), rgba(79, 195, 247, 0.1));
    border: 1px solid #9b59b6;
}

.bonus-section .lesson-header {
    border-bottom-color: #9b59b6;
}

.bonus-section .lesson-number {
    background: #9b59b6;
}

/* ============================================================================
   BASIC EDITOR STYLES
   ============================================================================ */

.basic-editor {
    display: flex;
    flex-direction: column;
    background: #1a1a2e;
    border: 2px solid var(--c64-light-blue);
    border-radius: 8px;
    overflow: hidden;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* Editor Toolbar */
.editor-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: linear-gradient(180deg, #2a2a4e, #1a1a2e);
    border-bottom: 1px solid var(--c64-light-blue);
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-select {
    background: transparent;
    color: #666;
    border: 1px solid #444;
    border-radius: 3px;
    padding: 0.1rem 0.3rem;
    font-family: inherit;
    font-size: 0.7rem;
    cursor: pointer;
    margin-left: 0.5rem;
}

.language-select:hover {
    color: #999;
    border-color: #666;
}

.language-select:focus {
    outline: none;
    border-color: #666;
}

.editor-btn {
    background: linear-gradient(180deg, #3a3a5e, #2a2a4e);
    color: var(--c64-light-blue);
    border: 1px solid var(--c64-light-blue);
    border-radius: 4px;
    padding: 0.35rem 0.75rem;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.editor-btn:hover {
    background: var(--c64-light-blue);
    color: var(--c64-black);
}

.editor-btn.load-btn {
    background: linear-gradient(180deg, #2d5a2d, #1a3a1a);
    border-color: var(--c64-light-green);
    color: var(--c64-light-green);
}

.editor-btn.load-btn:hover {
    background: var(--c64-light-green);
    color: var(--c64-black);
}

.btn-icon {
    font-size: 0.9rem;
}

/* Search Container */
.search-container {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.search-input {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid #444;
    border-radius: 3px;
    color: var(--c64-light-grey);
    padding: 0.25rem 0.5rem;
    font-family: inherit;
    font-size: 0.8rem;
    width: 120px;
    transition: border-color 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--c64-light-blue);
}

.search-input::placeholder {
    color: #666;
}

.search-btn {
    background: transparent;
    border: 1px solid #444;
    border-radius: 3px;
    color: #888;
    cursor: pointer;
    padding: 0.2rem 0.4rem;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.search-btn:hover {
    border-color: var(--c64-light-blue);
    color: var(--c64-light-blue);
}

/* Run/Step/Stop buttons for ASM mode */
.editor-btn.run-btn {
    background: linear-gradient(180deg, #2d5a2d, #1a3a1a);
    border-color: var(--c64-light-green);
    color: var(--c64-light-green);
}

.editor-btn.run-btn:hover {
    background: var(--c64-light-green);
    color: var(--c64-black);
}

.editor-btn.step-btn {
    background: linear-gradient(180deg, #5a5a2d, #3a3a1a);
    border-color: #ffc832;
    color: #ffc832;
}

.editor-btn.step-btn:hover {
    background: #ffc832;
    color: var(--c64-black);
}

.editor-btn.stop-btn {
    background: linear-gradient(180deg, #5a2d2d, #3a1a1a);
    border-color: #ff6b6b;
    color: #ff6b6b;
}

.editor-btn.stop-btn:hover {
    background: #ff6b6b;
    color: var(--c64-black);
}

/* Active state for Run/Step buttons */
.editor-btn.run-btn.active {
    background: var(--c64-light-green);
    color: var(--c64-black);
    box-shadow: 0 0 10px var(--c64-light-green);
}

.editor-btn.step-btn.active {
    background: #ffc832;
    color: var(--c64-black);
    box-shadow: 0 0 10px #ffc832;
}

/* Editor Container */
.editor-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 200px;
    max-height: 400px;
    border: 2px solid transparent;
    transition: border-color 0.2s ease;
}

/* Focus state - highlighted border when editor has focus */
.editor-container.focused {
    border-color: var(--c64-light-blue);
    box-shadow: 0 0 8px rgba(136, 126, 203, 0.4);
}

/* Line Numbers */
.line-numbers {
    background: #0d0d1a;
    color: #555;
    padding: 0.5rem 0;
    text-align: right;
    user-select: none;
    overflow: hidden;
    min-width: 40px;
    border-right: 1px solid #333;
}

.line-number {
    padding: 0 0.5rem;
    height: 1.4em;
    line-height: 1.4em;
}

.line-number.error {
    background: rgba(255, 0, 0, 0.2);
    color: #ff6b6b;
}

/* Debug highlight - current line being executed */
.line-number.debug-highlight {
    background: rgba(255, 200, 50, 0.3);
    color: #ffc832;
    font-weight: bold;
}

/* Editor Wrapper (contains both textarea and highlight overlay) */
.editor-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
}

/* Textarea (actual editable element) */
.editor-textarea {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 0.5rem;
    margin: 0;
    border: none;
    outline: none;
    background: transparent;
    color: transparent;
    caret-color: var(--c64-light-blue);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.4;
    resize: none;
    white-space: pre;
    overflow: auto;
    z-index: 2;
    tab-size: 2;
    -moz-tab-size: 2;
}

.editor-textarea::selection {
    background: rgba(136, 126, 203, 0.4);
}

/* Syntax Highlight Overlay */
.editor-highlight {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 0.5rem;
    margin: 0;
    background: #0a0a14;
    color: var(--c64-light-grey);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.4;
    white-space: pre;
    overflow: auto;
    pointer-events: none;
    z-index: 1;
    tab-size: 2;
    -moz-tab-size: 2;
}

/* Syntax Highlighting Token Colors */
.token-keyword {
    color: #ff79c6;
    font-weight: bold;
}

.token-string {
    color: #f1fa8c;
}

.token-number {
    color: #bd93f9;
}

.token-operator {
    color: #ff79c6;
}

.token-comment {
    color: #6272a4;
    font-style: italic;
}

.token-variable {
    color: #8be9fd;
}

.token-function {
    color: #50fa7b;
}

.token-linenumber {
    color: #ffb86c;
}

.token-punctuation {
    color: var(--c64-light-grey);
}

.token-error {
    color: #ff5555;
    text-decoration: wavy underline;
    text-decoration-color: #ff5555;
}

/* Editor Status Bar */
.editor-status {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.35rem 0.75rem;
    background: #0d0d1a;
    border-top: 1px solid #333;
    font-size: 0.8rem;
    color: #777;
}

.status-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.error-count {
    margin-left: 1rem;
}

.error-count.has-errors {
    color: #ff5555;
}

.error-count.has-warnings {
    color: #ffb86c;
}

/* Example Selector */
.example-selector {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
}

.example-selector label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--c64-light-blue);
    font-size: 0.9rem;
}

.example-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.example-btn {
    background: linear-gradient(180deg, #2a2a4e, #1a1a2e);
    color: var(--c64-light-blue);
    border: 1px solid var(--c64-light-blue);
    border-radius: 4px;
    padding: 0.25rem 0.6rem;
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.example-btn:hover {
    background: var(--c64-light-blue);
    color: var(--c64-black);
}

/* Editor Panel Layout */
.editor-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.editor-panel h2 {
    margin: 0;
    color: var(--c64-cyan);
    font-size: 1.3rem;
}

.editor-panel p {
    margin: 0.5rem 0;
    color: var(--c64-light-grey);
    font-size: 0.9rem;
}

/* Responsive adjustments for editor */
@media (max-width: 1200px) {
    .editor-container {
        min-height: 180px;
        max-height: 350px;
    }
}

@media (max-width: 900px) {
    .editor-container {
        min-height: 150px;
        max-height: 300px;
    }
    
    .editor-toolbar {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .toolbar-left, .toolbar-right {
        width: 100%;
        justify-content: center;
    }
}