:root {
    --comic-black: #1a1a2e;
    --comic-white: #f5f5f5;
    --comic-red: #e94560;
    --comic-blue: #0f3460;
    --comic-yellow: #ffd93d;
    --comic-green: #6bcb77;
    --panel-shadow: 4px 4px 0 rgba(0,0,0,0.8);
    --border-width: 3px;
    --gap: 1rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Comic Neue', cursive;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--comic-black);
    min-height: 100vh;
    overflow-x: hidden;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--comic-yellow);
    color: var(--comic-black);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
    border: var(--border-width) solid var(--comic-black);
}

.skip-link:focus {
    top: 0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* Loader */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--comic-black);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s;
}

.loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
    color: var(--comic-white);
}

.loader-content h1 {
    font-family: 'Bebas Neue', cursive;
    font-size: 4rem;
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.loader-bar {
    width: 200px;
    height: 8px;
    background: rgba(255,255,255,0.2);
    border-radius: 4px;
    overflow: hidden;
    margin: 0 auto 1rem;
}

.loader-bar::after {
    content: '';
    display: block;
    width: 50%;
    height: 100%;
    background: var(--comic-yellow);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(300%); }
}

/* Header */
.header {
    background: var(--comic-white);
    border-bottom: var(--border-width) solid var(--comic-black);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-family: 'Bebas Neue', cursive;
    font-size: 2.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: linear-gradient(45deg, var(--comic-red), var(--comic-blue));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-controls {
    display: flex;
    gap: 1rem;
}

.control-btn {
    position: relative;
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    padding: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 8px;
}

.control-btn:hover {
    background: var(--comic-yellow);
    transform: translateY(-2px);
    box-shadow: var(--panel-shadow);
}

.control-btn svg {
    width: 24px;
    height: 24px;
    stroke-width: 2;
}

.tooltip {
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--comic-black);
    color: var(--comic-white);
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.control-btn:hover .tooltip {
    opacity: 1;
}

/* Timeline Control */
.timeline-control {
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    margin: 2rem auto;
    padding: 2rem;
    max-width: 1400px;
    box-shadow: var(--panel-shadow);
}

.timeline-wrapper {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.timeline-btn {
    background: var(--comic-yellow);
    border: var(--border-width) solid var(--comic-black);
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 50%;
}

.timeline-btn:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: var(--panel-shadow);
}

.timeline-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.timeline-slider-container {
    flex: 1;
    position: relative;
}

.timeline-slider {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, var(--comic-red) 0%, var(--comic-green) 100%);
    border-radius: 4px;
    outline: none;
}

.timeline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    background: var(--comic-yellow);
    border: var(--border-width) solid var(--comic-black);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--panel-shadow);
}

.timeline-slider::-moz-range-thumb {
    width: 32px;
    height: 32px;
    background: var(--comic-yellow);
    border: var(--border-width) solid var(--comic-black);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--panel-shadow);
}

.timeline-markers {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
}

.marker {
    width: 16px;
    height: 16px;
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.marker.active {
    background: var(--comic-yellow);
    transform: scale(1.3);
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-weight: bold;
    font-size: 0.875rem;
}

.chapter-title {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    text-transform: uppercase;
}

#chapterNumber {
    color: var(--comic-red);
}

/* Parallel Worlds */
.worlds-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.world {
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    padding: 1.5rem;
    box-shadow: var(--panel-shadow);
    position: relative;
}

.world-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: var(--border-width) solid var(--comic-black);
}

.world-header h3 {
    font-family: 'Bebas Neue', cursive;
    font-size: 1.75rem;
    text-transform: uppercase;
}

.world-indicator {
    padding: 0.5rem 1rem;
    border: 2px solid;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: bold;
    text-transform: uppercase;
}

.world-indicator.negative {
    border-color: var(--comic-red);
    color: var(--comic-red);
}

.world-indicator.positive {
    border-color: var(--comic-green);
    color: var(--comic-green);
}

.panels-container {
    display: grid;
    gap: 1.5rem;
}

.comic-panel {
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    padding: 1rem;
    position: relative;
    min-height: 200px;
    transition: var(--transition);
}

.comic-panel:hover {
    transform: translateY(-4px);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.8);
}

.panel-content {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.panel-illustration {
    height: 150px;
    background: linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0),
                linear-gradient(45deg, #f0f0f0 25%, transparent 25%, transparent 75%, #f0f0f0 75%, #f0f0f0);
    background-size: 20px 20px;
    background-position: 0 0, 10px 10px;
    border: 2px solid var(--comic-black);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.speech-bubble {
    background: var(--comic-white);
    border: 2px solid var(--comic-black);
    padding: 1rem;
    position: relative;
    border-radius: 20px;
    font-size: 0.95rem;
    line-height: 1.4;
    margin-top: auto;
}

.speech-bubble::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 30px;
    width: 20px;
    height: 20px;
    background: var(--comic-white);
    border-right: 2px solid var(--comic-black);
    border-bottom: 2px solid var(--comic-black);
    transform: rotate(45deg);
}

.world-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.divider-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4px;
    background: repeating-linear-gradient(
        to bottom,
        var(--comic-black),
        var(--comic-black) 10px,
        transparent 10px,
        transparent 20px
    );
}

.compare-btn {
    background: var(--comic-yellow);
    border: var(--border-width) solid var(--comic-black);
    padding: 1rem;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
}

.compare-btn:hover {
    transform: rotate(180deg) scale(1.1);
    box-shadow: var(--panel-shadow);
}

/* Character Selector */
.character-selector {
    max-width: 1400px;
    margin: 4rem auto;
    padding: 2rem;
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    box-shadow: var(--panel-shadow);
}

.character-selector h2 {
    font-family: 'Bebas Neue', cursive;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
    text-transform: uppercase;
}

.characters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.character-card {
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.character-card:hover,
.character-card.active {
    background: var(--comic-yellow);
    transform: translateY(-4px);
    box-shadow: var(--panel-shadow);
}

.character-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border: var(--border-width) solid var(--comic-black);
    border-radius: 50%;
    background-size: cover;
    background-position: center;
}

.character-avatar.sarah {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.character-avatar.marcus {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.character-avatar.maria {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.character-avatar.james {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
}

.character-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.character-card p {
    color: #666;
    margin-bottom: 0.5rem;
}

.character-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--comic-blue);
    color: var(--comic-white);
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
}

/* Info Section */
.info-section {
    max-width: 1400px;
    margin: 4rem auto;
    padding: 2rem;
}

.info-section h2 {
    font-family: 'Bebas Neue', cursive;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
    text-transform: uppercase;
    color: var(--comic-white);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.info-card {
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    padding: 1.5rem;
    box-shadow: var(--panel-shadow);
    transition: var(--transition);
}

.info-card:hover {
    transform: translateY(-4px) rotate(-1deg);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.8);
}

.info-card h3 {
    font-family: 'Bebas Neue', cursive;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--comic-red);
}

.info-card p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.stat {
    background: var(--comic-yellow);
    border: 2px solid var(--comic-black);
    padding: 0.75rem;
    text-align: center;
    font-weight: bold;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: var(--comic-black);
    color: var(--comic-white);
    padding: 3rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-content p {
    margin-bottom: 1rem;
}

.share-btn {
    background: var(--comic-yellow);
    color: var(--comic-black);
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
}

.share-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--panel-shadow);
}

/* Modal */
.modal {
    padding: 0;
    border: none;
    border-radius: 0;
    max-width: 600px;
    width: 90%;
}

.modal::backdrop {
    background: rgba(0, 0, 0, 0.8);
}

.modal-content {
    background: var(--comic-white);
    border: var(--border-width) solid var(--comic-black);
    padding: 2rem;
    box-shadow: var(--panel-shadow);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--comic-red);
    color: var(--comic-white);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    transform: rotate(90deg);
}

.modal-body h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--comic-blue);
}

.modal-body ul {
    margin-left: 1.5rem;
    line-height: 1.8;
}

/* Responsive Design */
@media (max-width: 968px) {
    .worlds-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .world-divider {
        display: none;
    }

    .timeline-labels {
        font-size: 0.75rem;
    }

    .characters {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 640px) {
    .logo {
        font-size: 1.75rem;
    }

    .nav {
        padding: 1rem;
    }

    .timeline-wrapper {
        gap: 1rem;
    }

    .timeline-btn {
        padding: 0.75rem;
    }

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

    .character-selector h2,
    .info-section h2 {
        font-size: 2rem;
    }
}

/* Motion Preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print Styles */
@media print {
    .nav-controls,
    .timeline-control,
    .character-selector,
    .footer {
        display: none;
    }

    .worlds-container {
        grid-template-columns: 1fr;
    }

    .world {
        page-break-inside: avoid;
        margin-bottom: 2rem;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --comic-black: #000;
        --comic-white: #fff;
        --comic-red: #ff0000;
        --comic-blue: #0000ff;
        --comic-yellow: #ffff00;
        --comic-green: #00ff00;
    }

    * {
        border-width: 4px !important;
    }
}