/* ==============================================
   archaic.works — Stratigraphic Excavation
   Archaeological workshop meets deep time
   ============================================== */

:root {
    --kiln-smoke: #1E1B18;
    --fired-clay: #6B4226;
    --oxidized-bronze: #C4956A;
    --parchment-dust: #E8DCC8;
    --calcium-white: #F5F0E8;
    --iron-gall: #3B2F2F;
    --sediment-gray: #8B7355;
    --verdigris: #5B8C6A;
    --charcoal-trace: #2A2520;

    --font-display: 'Cormorant Garamond', serif;
    --font-body: 'Source Serif 4', serif;
    --font-annotation: 'Alegreya Sans', sans-serif;
    --font-glyph: 'Noto Serif Display', serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--parchment-dust);
    color: var(--iron-gall);
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    line-height: 1.72;
    overflow-x: hidden;
}

/* --- Timeline Spine --- */
.timeline-spine {
    position: fixed;
    left: 120px;
    top: 0;
    bottom: 0;
    width: 24px;
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
}

.spine-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--sediment-gray);
    left: 50%;
    transform: translateX(-50%);
}

.spine-marker {
    position: relative;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--oxidized-bronze);
    border: 2px solid var(--fired-clay);
    z-index: 2;
    margin-top: 20vh;
    flex-shrink: 0;
    transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1), background 0.6s ease;
    pointer-events: auto;
    cursor: pointer;
}

.spine-marker.active {
    transform: scale(1.3);
    background: var(--verdigris);
    border-color: var(--oxidized-bronze);
}

.marker-date {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-annotation);
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--sediment-gray);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.spine-marker.active .marker-date {
    opacity: 1;
}

/* --- Site Label --- */
.site-label {
    position: fixed;
    top: 24px;
    left: 24px;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 1rem;
    letter-spacing: 0.15em;
    color: var(--iron-gall);
    z-index: 100;
    opacity: 0;
    animation: fadeIn 0.5s ease 0.5s forwards;
}

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

/* --- Strata (Sections) --- */
.stratum {
    min-height: 100vh;
    position: relative;
    padding: 12vh 120px 12vh 200px;
}

/* Surface */
.stratum-surface {
    background: var(--parchment-dust);
}

/* First Stratum */
.stratum-first {
    background: #E0D4BF;
}

/* Excavation Grid */
.stratum-grid {
    background: var(--parchment-dust);
    padding-bottom: 15vh;
}

/* Deep Stratum */
.stratum-deep {
    background: var(--fired-clay);
    color: var(--calcium-white);
}

/* Workshop Floor */
.stratum-floor {
    background: var(--kiln-smoke);
    color: var(--oxidized-bronze);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
}

/* --- Catalog Labels --- */
.catalog-label {
    position: absolute;
    top: 16px;
    right: 24px;
    font-family: var(--font-annotation);
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    color: var(--sediment-gray);
    text-transform: uppercase;
}

.catalog-light {
    color: var(--oxidized-bronze);
    opacity: 0.6;
}

/* --- Surface Glyph --- */
.surface-glyph {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 200px;
    opacity: 0;
    animation: fadeIn 1s ease 0.3s forwards;
}

/* --- Editorial Layout --- */
.editorial {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
}

.annotation-col {
    flex: 0 0 200px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.annotation {
    font-family: var(--font-annotation);
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--sediment-gray);
}

.main-col {
    flex: 1;
    max-width: 680px;
}

.section-heading {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4.5rem);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--iron-gall);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.stratum-deep .section-heading {
    color: var(--calcium-white);
}

.body-text {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.8vw, 1.2rem);
    line-height: 1.72;
    color: inherit;
    margin-bottom: 1.5rem;
}

/* --- Kiln Diagram SVG --- */
.kiln-diagram {
    width: 100px;
    height: 80px;
    margin-top: 0.5rem;
}

/* --- Potsherd --- */
.potsherd {
    position: absolute;
    right: 80px;
    bottom: 20vh;
    width: 60px;
    height: 50px;
    animation: gentleRotate 20s ease-in-out infinite alternate;
    opacity: 0.7;
}

@keyframes gentleRotate {
    0% { transform: rotate(-1deg); }
    100% { transform: rotate(3deg); }
}

/* --- Stratigraphy Bands --- */
.strat-band {
    height: 10px;
    position: relative;
    z-index: 10;
}

.band-sand {
    background: repeating-linear-gradient(
        0deg,
        var(--sediment-gray) 0px,
        transparent 1px,
        transparent 3px
    ),
    repeating-linear-gradient(
        90deg,
        var(--sediment-gray) 0px,
        transparent 1px,
        transparent 5px
    );
    background-color: var(--parchment-dust);
    opacity: 0.5;
}

.band-stipple {
    background-image: radial-gradient(circle 1px, var(--sediment-gray) 100%, transparent 100%);
    background-size: 6px 6px;
    background-color: var(--parchment-dust);
    opacity: 0.4;
}

.band-wave {
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 2px,
        var(--sediment-gray) 2px,
        var(--sediment-gray) 3px,
        transparent 3px,
        transparent 5px
    );
    background-color: var(--parchment-dust);
    opacity: 0.3;
}

.band-brick {
    background:
        repeating-linear-gradient(
            0deg,
            var(--sediment-gray) 0px,
            var(--sediment-gray) 1px,
            transparent 1px,
            transparent 5px
        ),
        repeating-linear-gradient(
            90deg,
            var(--sediment-gray) 0px,
            var(--sediment-gray) 1px,
            transparent 1px,
            transparent 10px
        );
    background-color: var(--parchment-dust);
    opacity: 0.35;
}

/* --- Excavation Grid --- */
.grid-heading {
    text-align: center;
    margin-bottom: 4rem;
}

.excavation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1px;
    max-width: 900px;
    margin: 0 auto;
    border: 1px dashed rgba(139, 115, 85, 0.3);
}

.grid-cell {
    aspect-ratio: 1;
    border: 1px dashed rgba(139, 115, 85, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: transform 0.15s ease;
    perspective: 600px;
    overflow: hidden;
}

.grid-cell svg {
    width: 40px;
    height: 40px;
    transition: opacity 0.3s ease;
}

.cell-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--charcoal-trace);
    color: var(--calcium-white);
    padding: 10px;
    transform: translateY(100%);
    transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cell-overlay span {
    font-family: var(--font-annotation);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}

.cell-date {
    color: var(--oxidized-bronze);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.grid-cell:hover .cell-overlay {
    transform: translateY(0);
}

.grid-cell:hover svg {
    opacity: 0.4;
}

/* --- Deep Stratum --- */
.deep-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.deep-text {
    font-family: var(--font-body);
    font-size: 1.3rem;
    line-height: 1.85;
    color: var(--calcium-white);
    margin-bottom: 2rem;
}

.deep-glyph {
    width: 40px;
    height: 40px;
    display: block;
    margin: 2rem auto;
}

/* --- Workshop Floor Mandala --- */
.workshop-mandala {
    width: 400px;
    height: 400px;
    margin-bottom: 3rem;
}

.mandala-svg {
    width: 100%;
    height: 100%;
}

.mandala-path {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    transition: stroke-dashoffset 4s ease-out;
}

.mandala-path.drawn {
    stroke-dashoffset: 0;
}

.floor-wordmark {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(1.5rem, 4vw, 3rem);
    letter-spacing: 0.15em;
    color: var(--oxidized-bronze);
    opacity: 0;
    transition: opacity 1.5s ease;
}

.floor-wordmark.visible {
    opacity: 1;
}

/* --- Slide Reveal Animation --- */
.slide-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1), transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.slide-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .timeline-spine {
        display: none;
    }

    .stratum {
        padding: 8vh 1.5rem;
    }

    .editorial {
        flex-direction: column;
        gap: 1.5rem;
    }

    .annotation-col {
        flex: none;
    }

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

    .workshop-mandala {
        width: 280px;
        height: 280px;
    }

    .site-label {
        top: 12px;
        left: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .potsherd {
        animation: none;
    }

    .slide-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .mandala-path {
        stroke-dashoffset: 0;
        transition: none;
    }

    .surface-glyph {
        animation: none;
        opacity: 0.6;
    }
}