/* daitoua.com - Sepia Toned History */
/* Palette: #f0e6d3, #2c2419, #c4a97d, #8b4513, #7a6b54, #faf3e6, #d4a843 */

:root {
    --sepia: #f0e6d3;
    --text: #2c2419;
    --border: #c4a97d;
    --accent: #8b4513;
    --caption: #7a6b54;
    --panel: #faf3e6;
    --gold: #d4a843;
}

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

body {
    background: var(--sepia);
    color: var(--text);
    font-family: 'Lora', serif;
    font-weight: 400;
    font-size: 18px;
    line-height: 1.8;
    position: relative;
    overflow-x: hidden;
}

/* Aged Paper Grain Texture Overlay */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' 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)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* Archive Column */
.archive-column {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}

/* ================================ */
/* Hero Frame                       */
/* ================================ */
.hero-frame {
    padding: 100px 0 50px;
    text-align: center;
}

.frame-inner {
    border: 1px solid var(--border);
    outline: 1px solid var(--border);
    outline-offset: 3px;
    padding: 3.5rem 2.5rem;
    position: relative;
    opacity: 0;
    animation: heroReveal 1.2s ease-out 0.3s forwards;
}

@keyframes heroReveal {
    0% {
        opacity: 0;
        outline-offset: 20px;
    }
    50% {
        opacity: 0.6;
        outline-offset: 6px;
    }
    100% {
        opacity: 1;
        outline-offset: 3px;
    }
}

.compass-rose {
    margin: 0 auto 1.5rem;
    opacity: 0;
    animation: compassFadeIn 1s ease-out 1s forwards;
}

@keyframes compassFadeIn {
    0% {
        opacity: 0;
        transform: rotate(-90deg) scale(0.5);
    }
    100% {
        opacity: 0.6;
        transform: rotate(0deg) scale(1);
    }
}

.archive-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--text);
    letter-spacing: 0.02em;
    opacity: 0;
    animation: titleReveal 0.8s ease-out 0.8s forwards;
}

@keyframes titleReveal {
    0% {
        opacity: 0;
        transform: translateY(12px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.date-range {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--caption);
    margin-top: 0.75rem;
    opacity: 0;
    animation: dateReveal 0.8s ease-out 1.4s forwards;
}

@keyframes dateReveal {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

/* ================================ */
/* Timeline                         */
/* ================================ */
.timeline-track {
    position: relative;
    padding-left: 48px;
    margin-top: 4rem;
}

.timeline-track::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
}

.timeline-node {
    position: relative;
    padding: 1.25rem 0 0.5rem;
}

.year-marker {
    position: absolute;
    left: -48px;
    top: 1.25rem;
    width: 40px;
    text-align: center;
    font-family: 'Inter', sans-serif;
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.05em;
}

.year-marker::after {
    content: '';
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1.5px solid var(--border);
    background: var(--sepia);
    transition: background 0.3s ease, border-color 0.3s ease;
}

/* Active year marker when panel is visible */
.timeline-node.active .year-marker::after {
    background: var(--gold);
    border-color: var(--accent);
}

.timeline-node.active .year-marker {
    color: var(--gold);
}

/* ================================ */
/* Exhibit Panel                    */
/* ================================ */
.exhibit-panel {
    background: var(--panel);
    border: 1px solid var(--border);
    outline: 1px solid var(--border);
    outline-offset: 3px;
    padding: 28px 24px;
    margin-bottom: 2.5rem;
    position: relative;
}

/* Ornamental L-shaped Corners */
.corner {
    position: absolute;
    width: 14px;
    height: 14px;
    pointer-events: none;
}

.corner-tl {
    top: -6px;
    left: -6px;
    border-top: 1.5px solid var(--accent);
    border-left: 1.5px solid var(--accent);
}

.corner-tr {
    top: -6px;
    right: -6px;
    border-top: 1.5px solid var(--accent);
    border-right: 1.5px solid var(--accent);
}

.corner-bl {
    bottom: -6px;
    left: -6px;
    border-bottom: 1.5px solid var(--accent);
    border-left: 1.5px solid var(--accent);
}

.corner-br {
    bottom: -6px;
    right: -6px;
    border-bottom: 1.5px solid var(--accent);
    border-right: 1.5px solid var(--accent);
}

.section-label {
    font-family: 'Inter', sans-serif;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    display: block;
    margin-bottom: 0.75rem;
}

.exhibit-heading {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.exhibit-body {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.exhibit-caption {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    color: var(--caption);
    font-style: italic;
    line-height: 1.5;
}

/* ================================ */
/* Stamp Label                      */
/* ================================ */
.stamp-label {
    display: inline-block;
    margin: 3rem 0 2rem 48px;
    position: relative;
}

.stamp-text {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--accent);
    border: 2px solid var(--accent);
    display: inline-block;
    padding: 0.35rem 1.2rem;
    transform: rotate(-2deg);
    opacity: 0.7;
    position: relative;
}

.stamp-text::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    right: -2px;
    bottom: -2px;
    border: 1px solid var(--accent);
    opacity: 0.3;
}

/* ================================ */
/* Source Panel                     */
/* ================================ */
.source-panel {
    margin-left: 48px;
    margin-bottom: 2.5rem;
}

.source-quote {
    border-left: 3px solid var(--gold);
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.quote-text {
    font-family: 'Lora', serif;
    font-style: italic;
    font-size: 1.15rem;
    color: var(--text);
    line-height: 1.75;
}

.source-attribution {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    color: var(--caption);
    margin-left: 1.5rem;
}

/* ================================ */
/* Credits                          */
/* ================================ */
.credits-panel {
    text-align: center;
    padding: 2rem 0 5rem;
    margin-top: 1rem;
}

.thin-rule {
    border: none;
    border-top: 1px solid var(--border);
    margin-bottom: 2rem;
}

.credit-heading {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.25rem;
}

.credit-text {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    color: var(--caption);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.credit-divider {
    width: 40px;
    height: 1px;
    background: var(--border);
    margin: 1.5rem auto;
}

.credit-colophon {
    font-family: 'Inter', sans-serif;
    font-size: 0.7rem;
    color: var(--caption);
    letter-spacing: 0.1em;
    opacity: 0.6;
    margin-bottom: 0.25rem;
}

/* ================================ */
/* Reveal Animation (Scroll)        */
/* ================================ */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Staggered delay for sequential panels */
.exhibit-panel.visible {
    transition-delay: 0.1s;
}

/* ================================ */
/* Responsive                       */
/* ================================ */
@media (max-width: 768px) {
    .hero-frame {
        padding: 60px 0 30px;
    }

    .frame-inner {
        padding: 2.5rem 1.5rem;
    }

    .timeline-track {
        padding-left: 0;
    }

    .timeline-track::before {
        display: none;
    }

    .timeline-node {
        padding: 0.75rem 0 0.25rem;
    }

    .year-marker {
        position: static;
        display: block;
        text-align: left;
        margin-bottom: 0.25rem;
    }

    .year-marker::after {
        display: none;
    }

    .stamp-label,
    .source-panel {
        margin-left: 0;
    }

    .exhibit-panel {
        margin-bottom: 2rem;
        padding: 20px 16px;
    }

    .corner {
        display: none;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 16px;
    }

    .archive-column {
        padding: 0 16px;
    }

    .frame-inner {
        padding: 2rem 1rem;
    }

    .quote-text {
        font-size: 1rem;
    }
}