/* historical.day - Split-Screen Chronicle */

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

:root {
    --black-deep: #040405;
    --teal: #2dd4bf;
    --brown-dark: #2c2a28;
    --cream: #e8e4dc;
    --gold: #d4a03c;
    --stone: #d4d0c8;
    --archive-bg: #0b0c10;
    --teal-light: #3cccd4;
    --red-alert: #c44040;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--black-deep);
    color: var(--cream);
    font-family: 'Source Serif 4', serif;
    overflow-x: hidden;
}

/* Split Screen Layout */
.split-screen {
    display: flex;
    min-height: 100vh;
}

/* Archive Panel - Left */
.archive-panel {
    width: 55vw;
    height: 100vh;
    position: sticky;
    top: 0;
    background: var(--archive-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.archive-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chapter-visual {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    pointer-events: none;
}

.chapter-visual.active {
    opacity: 1;
    pointer-events: auto;
}

/* Date Display */
.date-display {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(4rem, 12vw, 10rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--cream);
    opacity: 0.12;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 0;
    user-select: none;
}

/* SVG Compositions */
.geo-composition {
    width: 60%;
    max-width: 400px;
    height: auto;
    z-index: 1;
    opacity: 0.85;
}

/* Revolution - concentric circles */
.frag-circle {
    fill: none;
    stroke: var(--teal);
    stroke-width: 1.5;
    opacity: 0.7;
}

.revolution .c1 { stroke-dasharray: 20 10; animation: rotSlow 20s linear infinite; transform-origin: center; }
.revolution .c2 { stroke: var(--gold); stroke-dasharray: 15 8; animation: rotSlow 15s linear infinite reverse; transform-origin: center; }
.revolution .c3 { stroke-dasharray: 10 5; animation: rotSlow 25s linear infinite; transform-origin: center; }
.revolution .c4 { stroke: var(--teal-light); animation: rotSlow 10s linear infinite reverse; transform-origin: center; }

/* Conflict - triangles */
.frag-tri {
    fill: none;
    stroke: var(--gold);
    stroke-width: 1.5;
    opacity: 0.7;
}

.conflict .t1 { stroke: var(--red-alert); stroke-dasharray: 30 15; }
.conflict .t2 { stroke: var(--gold); stroke-dasharray: 20 10; }
.conflict .t3 { stroke: var(--teal-light); stroke-dasharray: 10 5; }

/* Discovery - lines */
.frag-line {
    stroke: var(--teal);
    stroke-width: 1;
    opacity: 0.6;
}

.discovery .l1 { stroke: var(--teal-light); }
.discovery .l2 { stroke: var(--gold); }
.discovery .l3 { stroke: var(--teal); opacity: 0.4; }
.discovery .l4 { stroke: var(--stone); opacity: 0.3; }
.discovery .c1 { fill: var(--teal); opacity: 0.15; stroke: var(--teal); }

/* Collapse - rectangles */
.frag-rect {
    fill: none;
    stroke: var(--stone);
    stroke-width: 1;
    opacity: 0.6;
}

.collapse .r1 { stroke: var(--cream); opacity: 0.4; }
.collapse .r2 { stroke: var(--cream); opacity: 0.4; }
.collapse .r3 { stroke: var(--gold); opacity: 0.3; }

/* Digital - scattered grid */
.digital .frag-rect {
    stroke: var(--teal);
    opacity: 0.5;
}

.digital .r2 { stroke: var(--gold); }
.digital .r4 { stroke: var(--teal-light); }

/* Scan Line Effect */
.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--teal);
    opacity: 0.15;
    animation: scanDown 8s linear infinite;
    pointer-events: none;
}

/* Noise Overlay */
.noise-overlay {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    opacity: 0.4;
}

/* Interpretation Panel - Right */
.interpretation-panel {
    width: 45vw;
    min-height: 100vh;
    background: var(--brown-dark);
    padding: 4rem 3rem;
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Header */
.site-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 4rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(232, 228, 220, 0.1);
}

.site-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--teal);
}

.site-subtitle {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.75rem;
    font-weight: 300;
    color: var(--stone);
    opacity: 0.6;
}

/* Chapters */
.chapter {
    padding: 4rem 0;
    border-bottom: 1px solid rgba(232, 228, 220, 0.06);
    opacity: 0.4;
    transition: opacity 0.6s ease;
}

.chapter.active {
    opacity: 1;
}

.chapter-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.chapter-tag {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--teal);
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--teal);
    opacity: 0.7;
}

.chapter-date {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.75rem;
    font-weight: 300;
    color: var(--gold);
    opacity: 0.8;
}

.chapter-title {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(1.5rem, 2.5vw, 2.2rem);
    font-weight: 600;
    color: var(--cream);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.chapter-body {
    font-family: 'Source Serif 4', serif;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--stone);
    margin-bottom: 1.2rem;
    max-width: 540px;
}

/* Footer */
.site-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(232, 228, 220, 0.1);
}

.footer-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: var(--stone);
    opacity: 0.4;
    font-style: italic;
}

/* Animations */
@keyframes scanDown {
    0% { top: 0; }
    100% { top: 100%; }
}

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

/* Glitch flicker on visuals */
@keyframes glitchFlicker {
    0%, 95%, 100% { opacity: 0.85; }
    96% { opacity: 0.4; transform: translateX(2px); }
    97% { opacity: 0.9; transform: translateX(-1px); }
    98% { opacity: 0.5; }
}

.chapter-visual.active .geo-composition {
    animation: glitchFlicker 6s infinite;
}

/* Responsive */
@media (max-width: 768px) {
    .split-screen {
        flex-direction: column;
    }

    .archive-panel {
        width: 100vw;
        height: 50vh;
        position: relative;
    }

    .interpretation-panel {
        width: 100vw;
        padding: 2rem 1.5rem;
    }
}