/* The Speed of Code - Styles */

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

:root {
    --bg-dark: #0a0a0f;
    --bg-card: #1a1a2e;
    --bg-card-light: #252540;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --accent-cyan: #00d4ff;
    --accent-cyan-dim: #0099cc;
    --accent-purple: #8b5cf6;
    --accent-yellow: #ffd700;
    --accent-green: #00ff88;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Screens */
.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.screen.active {
    display: flex;
    opacity: 1;
}

/* Start Screen */
#start-screen {
    background: radial-gradient(ellipse at center, #1a1a2e 0%, #0a0a0f 100%);
    align-items: center;
    justify-content: center;
    text-align: center;
}

.start-content {
    max-width: 600px;
    padding: 2rem;
}

/* Clock Icon Animation */
.clock-icon {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.clock-face {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 4px solid var(--accent-cyan);
    position: relative;
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.clock-hand {
    position: absolute;
    background: var(--accent-cyan);
    transform-origin: bottom center;
    left: 50%;
    bottom: 50%;
    border-radius: 2px;
}

.clock-hand.seconds {
    width: 2px;
    height: 30px;
    margin-left: -1px;
    animation: rotateSecond 1s linear infinite;
}

.clock-center {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

@keyframes rotateSecond {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.start-content h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.start-content .subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.primary-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-cyan-dim) 100%);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.4);
}

.primary-btn svg {
    transition: transform 0.2s;
}

.primary-btn:hover svg {
    transform: translateX(4px);
}

.hint {
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Experience Screen */
#experience-screen {
    background: linear-gradient(180deg, #0a0a1a 0%, #0f0f2a 100%);
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#time-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Particles Canvas */
#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.8;
}

/* Timeline */
#timeline {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 600px;
}

.timeline-bar {
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.timeline-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    border-radius: 4px;
    transform-origin: left;
    transition: transform 0.3s ease;
}

.timeline-marker {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--accent-cyan);
    z-index: 10;
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Time Display */
#time-display {
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
}

.time-value {
    font-size: clamp(4rem, 15vw, 10rem);
    font-weight: 800;
    font-family: 'Monaco', 'Consolas', monospace;
    background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    text-shadow: 0 0 60px rgba(0, 212, 255, 0.5);
}

.time-unit {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--accent-cyan);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-top: 0.5rem;
}

.time-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 1rem;
    opacity: 0.8;
}

/* Operations Display */
#operations-display {
    position: absolute;
    bottom: 25%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 10;
}

.ops-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.ops-counter {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
}

#ops-value {
    font-size: clamp(2rem, 8vw, 4rem);
    font-weight: 700;
    font-family: 'Monaco', 'Consolas', monospace;
    color: var(--accent-green);
    text-shadow: 0 0 30px rgba(0, 255, 136, 0.5);
}

.ops-suffix {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Operations Context - What can you do with these ops? */
#ops-context {
    margin-top: 0.75rem;
    padding-top: 0.5rem;
}

.ops-context-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#ops-examples {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    transition: opacity 0.3s ease;
}

.ops-example {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.6rem;
    background: rgba(0, 212, 255, 0.08);
    border-radius: 6px;
    border-left: 2px solid var(--accent-cyan);
    animation: slideInLeft 0.3s ease;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.ops-example-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.ops-example-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.2;
}

/* Milestone Display - positioned at top to avoid overlap */
#milestone-display {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--accent-cyan);
    text-align: center;
    z-index: 200;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
    white-space: nowrap;
}

#milestone-display.show {
    opacity: 1;
    animation: milestoneFadeIn 0.4s ease;
}

@keyframes milestoneFadeIn {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Scale Indicator */
#scale-indicator {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 100;
    background: rgba(0,0,0,0.7);
    padding: 15px 25px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.scale-bar {
    position: relative;
    width: 280px;
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: visible;
}

.scale-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    border-radius: 3px;
    transition: width 0.1s ease-out;
}

.scale-markers {
    position: absolute;
    top: -22px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.scale-markers span {
    opacity: 0.5;
    transition: opacity 0.3s, color 0.3s, transform 0.3s;
}

.scale-markers span.active {
    opacity: 1;
    color: var(--accent-cyan);
    transform: scale(1.1);
}

.scale-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'Monaco', 'Consolas', monospace;
}

/* Info Cards */
#info-cards {
    position: fixed;
    top: 30px;
    left: 30px;
    max-width: 320px;
    z-index: 100;
}

.info-card {
    background: var(--bg-card);
    padding: 1.25rem;
    border-radius: 16px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
    display: none;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.info-card.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.info-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.info-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.info-card p:last-child {
    margin-bottom: 0;
}

.card-note {
    font-size: 0.8rem !important;
    opacity: 0.7;
    font-style: italic;
}

.info-card strong {
    color: var(--accent-cyan);
}

/* Comparison Panel */
#comparison-panel {
    position: fixed;
    top: 30px;
    right: 30px;
    background: var(--bg-card);
    padding: 1.25rem;
    border-radius: 16px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    z-index: 100;
    max-width: 280px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

#comparison-panel h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.comparison-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.comparison-item {
    display: none;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.comparison-item.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateX(10px); }
    to { opacity: 1; transform: translateX(0); }
}

.comparison-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.comparison-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Historical Computing Panel */
#history-panel {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 220px;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid rgba(255, 200, 50, 0.2);
    padding: 1rem;
    z-index: 100;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.history-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-yellow);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 200, 50, 0.2);
}

.history-icon {
    font-size: 1rem;
}

.history-comparison {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    min-height: 2.5em;
    line-height: 1.4;
}

.history-comparison strong {
    color: var(--accent-yellow);
}

.history-timeline {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.timeline-item {
    display: grid;
    grid-template-columns: 40px 1fr auto;
    gap: 0.5rem;
    align-items: center;
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.5;
    transition: all 0.3s ease;
}

.timeline-item.active {
    background: rgba(255, 200, 50, 0.1);
    opacity: 1;
}

.timeline-item.highlight {
    background: rgba(255, 200, 50, 0.15);
    opacity: 0.9;
}

.timeline-item .year {
    font-weight: 600;
    color: var(--accent-yellow);
}

.timeline-item .name {
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.timeline-item .speed {
    font-family: 'Monaco', monospace;
    color: var(--accent-cyan);
    font-size: 0.65rem;
}

/* Fun Fact Container */
#fun-fact-container {
    position: fixed;
    bottom: 100px;
    left: 30px;
    right: auto;
    max-width: 350px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--bg-card);
    padding: 1rem 1.25rem;
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    z-index: 100;
}

.fun-fact-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

#fun-fact {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    transition: opacity 0.2s ease;
}

/* Navigation Hint */
#nav-hint {
    position: fixed;
    bottom: 170px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    opacity: 0.8;
    animation: bounce 2s infinite;
    z-index: 100;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-5px); }
}

#nav-hint.hidden {
    opacity: 0;
    pointer-events: none;
}

.scroll-icon svg {
    animation: scrollPulse 1.5s infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* Continue Button */
.continue-btn {
    position: fixed;
    bottom: 110px;
    left: 50%;
    transform: translateX(-50%);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.8rem;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-cyan-dim) 100%);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 150;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

.continue-btn:hover {
    transform: translateX(-50%) translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5);
}

.continue-btn.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(20px);
}

.continue-btn svg {
    transition: transform 0.2s;
}

.continue-btn:hover svg {
    transform: translateX(4px);
}

/* End Screen */
#end-screen {
    background: radial-gradient(ellipse at center, #1a1a2e 0%, #0a0a0f 100%);
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    overflow-y: auto;
}

.end-content {
    max-width: 800px;
    padding: 1rem;
}

.end-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.end-content h2 {
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.end-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat {
    background: var(--bg-card);
    padding: 1.25rem 1rem;
    border-radius: 16px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 0.25rem;
    font-family: 'Monaco', 'Consolas', monospace;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Perspective Section */
.perspective-section {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(0, 212, 255, 0.2);
    text-align: left;
}

.perspective-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-align: center;
}

.perspective-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.perspective-item {
    background: rgba(0,0,0,0.3);
    padding: 1rem;
    border-radius: 12px;
}

.perspective-compare {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.human-time {
    font-size: 1rem;
    color: var(--accent-yellow);
    font-weight: 600;
}

.vs {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.computer-time {
    font-size: 1rem;
    color: var(--accent-green);
    font-weight: 600;
    font-family: 'Monaco', monospace;
}

.perspective-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

/* History Section on End Screen */
.history-section {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 200, 50, 0.2);
    text-align: left;
}

.history-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--accent-yellow);
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.history-era {
    background: rgba(0,0,0,0.3);
    padding: 1rem;
    border-radius: 12px;
    border-left: 3px solid var(--text-secondary);
    transition: all 0.3s ease;
}

.history-era.highlight {
    border-left-color: var(--accent-yellow);
    background: rgba(255, 200, 50, 0.1);
}

.era-year {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-yellow);
    margin-bottom: 0.25rem;
}

.era-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.era-speed {
    font-size: 0.85rem;
    font-family: 'Monaco', monospace;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
}

.era-fact {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Code Section */
.code-section {
    margin-bottom: 2rem;
}

.code-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.code-examples {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.code-example {
    background: var(--bg-card);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.code-icon {
    font-size: 2rem;
}

.code-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

/* CTA Section */
.cta-section {
    margin-top: 1.5rem;
}

.cta-section h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.cta-section > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-btn.primary {
    color: white;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-cyan-dim) 100%);
}

.cta-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.4);
}

.cta-btn.secondary {
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.2);
}

.cta-btn.secondary:hover {
    transform: translateY(-2px);
    background: rgba(255,255,255,0.1);
}

.text-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.2s;
}

.text-btn:hover {
    color: var(--text-primary);
}

/* Back Link */
.back-link {
    position: fixed;
    top: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    background: rgba(0,0,0,0.5);
    border-radius: 20px;
    transition: all 0.2s;
    z-index: 1000;
}

.back-link:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.1);
}

/* Responsive */
@media (max-width: 768px) {
    #info-cards {
        top: auto;
        bottom: 220px;
        left: 15px;
        right: 15px;
        max-width: none;
    }

    #comparison-panel {
        display: none;
    }

    #history-panel {
        display: none;
    }

    #fun-fact-container {
        bottom: 120px;
        left: 15px;
        right: 15px;
        max-width: none;
    }

    #scale-indicator {
        bottom: 20px;
        padding: 12px 20px;
    }

    .scale-bar {
        width: 220px;
    }

    .scale-markers {
        font-size: 0.6rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .stat {
        padding: 1rem;
    }

    .stat-value {
        font-size: 1.2rem;
    }

    .code-examples {
        grid-template-columns: 1fr;
    }

    .history-grid {
        grid-template-columns: 1fr;
    }

    .history-era {
        padding: 0.75rem;
    }

    .end-content {
        padding: 0.5rem;
    }

    #nav-hint {
        bottom: 200px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-btn {
        width: 100%;
        justify-content: center;
    }

    #time-display {
        top: 20%;
    }

    .time-value {
        font-size: clamp(3rem, 12vw, 6rem);
    }

    #operations-display {
        bottom: 30%;
    }

    #ops-context {
        margin-top: 0.75rem;
        padding-top: 0.75rem;
    }

    .ops-example {
        padding: 0.4rem 0.6rem;
    }

    .ops-example-icon {
        font-size: 1rem;
    }

    .ops-example-text {
        font-size: 0.75rem;
    }

    #milestone-display {
        top: 60px;
        font-size: 0.8rem;
        padding: 0.5rem 1rem;
        white-space: normal;
        max-width: 90%;
    }
}

@media (max-width: 480px) {
    .start-content h1 {
        font-size: 2rem;
    }

    .clock-face {
        width: 60px;
        height: 60px;
    }

    .clock-hand.seconds {
        height: 22px;
    }

    .end-icon {
        font-size: 3rem;
    }
}