/* ============================================================
   historical.quest — Styles
   Antique book / Cabinet of Curiosities
   ============================================================ */

:root {
    --leather-umber: #3B2218;
    --parchment-cream: #F2E8D5;
    --venetian-gold: #C5A55A;
    --espresso-ink: #2C1810;
    --faded-sepia: #6B5744;
    --burgundy-seal: #4A1525;
    --aged-brass: #8B6F47;
    --foxed-ivory: #E8DACA;
    --crimson-ribbon: #8B1A1A;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--parchment-cream);
    color: var(--espresso-ink);
    font-family: 'Crimson Pro', serif;
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    line-height: 1.75;
    overflow-x: hidden;
}

.svg-defs {
    position: absolute;
    width: 0;
    height: 0;
}

.section {
    position: relative;
}

/* ---- Bookmark Ribbon Navigation ---- */
.bookmark-ribbon {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    align-items: flex-start;
}

.ribbon-tab {
    width: 8px;
    height: 60px;
    background: var(--crimson-ribbon);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 85%, 0 100%);
    cursor: pointer;
    transition: width 0.3s ease;
}

.ribbon-expanded {
    background: var(--leather-umber);
    width: 0;
    overflow: hidden;
    transition: width 0.3s ease-out;
    display: flex;
    flex-direction: column;
    padding: 0;
    border-left: 2px solid var(--venetian-gold);
}

.bookmark-ribbon:hover .ribbon-expanded,
.bookmark-ribbon.open .ribbon-expanded {
    width: 220px;
    padding: 16px;
}

.bookmark-ribbon:hover .ribbon-tab {
    width: 12px;
}

.ribbon-link {
    font-family: 'Cormorant SC', serif;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--foxed-ivory);
    text-decoration: none;
    display: block;
    padding: 6px 0;
    border-bottom: 1px solid rgba(197,165,90,0.2);
    transition: color 0.2s ease;
}

.ribbon-link:hover {
    color: var(--venetian-gold);
}

/* ---- Book Cover ---- */
.book-cover {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--leather-umber);
    background-image:
        radial-gradient(circle at 30% 40%, rgba(44,24,16,0.8) 0%, transparent 60%),
        radial-gradient(circle at 70% 60%, rgba(59,34,24,0.9) 0%, transparent 50%),
        repeating-radial-gradient(circle, rgba(44,24,16,0.1) 0px, transparent 2px, transparent 4px);
}

.cover-frame {
    position: absolute;
    top: 3vw;
    left: 3vw;
    right: 3vw;
    bottom: 3vw;
    border: 1px solid var(--venetian-gold);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.8s ease 0.5s;
}

.cover-frame.visible {
    opacity: 1;
}

.cover-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.cover-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    letter-spacing: 0.12em;
    color: var(--venetian-gold);
    text-shadow: 0 1px 0 rgba(0,0,0,0.4);
    opacity: 0;
    transition: opacity 1s ease 1.2s;
}

.cover-title.visible {
    opacity: 1;
}

.cover-epigraph {
    font-family: 'Crimson Pro', serif;
    font-style: italic;
    font-size: 1.15rem;
    color: var(--foxed-ivory);
    margin-top: 24px;
    opacity: 0;
    transition: opacity 1s ease 2s;
}

.cover-epigraph.visible {
    opacity: 1;
}

.cover-chevron {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: chevronPulse 2s ease-in-out infinite;
}

@keyframes chevronPulse {
    0%, 100% { opacity: 0.5; transform: translateX(-50%) translateY(0); }
    50% { opacity: 1; transform: translateX(-50%) translateY(8px); }
}

/* ---- Endpapers ---- */
.endpapers-section {
    min-height: 40vh;
    overflow: hidden;
    position: relative;
}

.marble-pattern {
    width: 100%;
    height: 100%;
    min-height: 40vh;
}

.marble-svg {
    width: 100%;
    height: 100%;
    min-height: 40vh;
    display: block;
}

.endpaper-rule {
    position: absolute;
    bottom: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: var(--venetian-gold);
}

/* ---- Chapter Sections ---- */
.chapter-section {
    padding: 80px 0;
    background: var(--parchment-cream);
    /* Ledger lines */
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent 0px,
            transparent calc(1.75rem - 1px),
            rgba(107,87,68,0.06) calc(1.75rem - 1px),
            rgba(107,87,68,0.06) 1.75rem
        );
}

.chapter-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
    padding: 0 24px;
}

.chapter-ornament {
    width: 100%;
    max-width: 400px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.chapter-number {
    font-family: 'Cormorant SC', serif;
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    color: var(--aged-brass);
    display: block;
    margin: 12px 0 4px;
}

.chapter-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--espresso-ink);
    margin-bottom: 12px;
}

/* ---- Folio Spread ---- */
.folio-spread {
    display: grid;
    grid-template-columns: 55% 40%;
    gap: 5%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 48px;
    position: relative;
}

.folio-spread[data-spread="verso"] {
    grid-template-columns: 40% 55%;
}

.folio-spread[data-spread="verso"] .plate-panel {
    order: -1;
}

/* Page-turn morph animation */
.folio-spread .text-block,
.folio-spread .plate-panel {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.folio-spread.spread-open .text-block,
.folio-spread.spread-open .plate-panel {
    opacity: 1;
}

/* ---- Text Block ---- */
.text-block p {
    margin-bottom: 1.5em;
}

/* Progressive reveal */
.reveal-zone p {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---- Plate Panel ---- */
.plate-panel {
    display: flex;
    align-items: flex-start;
    padding-top: 16px;
}

.artifact-plate {
    width: 100%;
    border: 3px solid transparent;
    border-image: linear-gradient(135deg, var(--venetian-gold), var(--aged-brass), var(--venetian-gold)) 1;
    position: relative;
    overflow: hidden;
}

/* Gold foil shimmer */
.artifact-plate::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(120deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
    transition: left 0.8s ease;
    pointer-events: none;
}

.artifact-plate:hover::after {
    left: 100%;
}

.plate-illustration {
    width: 100%;
    height: auto;
    display: block;
}

.plate-caption {
    font-family: 'Cormorant SC', serif;
    font-size: 10px;
    letter-spacing: 0.08em;
    fill: var(--faded-sepia);
}

/* ---- Marginalia Column ---- */
.marginalia-col {
    position: absolute;
    right: -140px;
    top: 0;
    width: 120px;
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.margin-note {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    color: var(--faded-sepia);
    opacity: 0.8;
    display: block;
    padding-left: 8px;
    border-left: 1px solid rgba(107,87,68,0.25);
}

/* ---- Foxing Layer ---- */
.foxing-layer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 1;
}

.foxing-layer::before,
.foxing-layer::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139,111,71,0.1) 0%, transparent 70%);
}

.foxing-layer::before {
    width: 12px;
    height: 12px;
    top: 15%;
    left: 22%;
}

.foxing-layer::after {
    width: 8px;
    height: 8px;
    top: 65%;
    right: 18%;
}

[data-section-seed="31"] .foxing-layer::before { top: 25%; left: 45%; width: 10px; height: 10px; }
[data-section-seed="31"] .foxing-layer::after { top: 70%; right: 30%; width: 15px; height: 15px; }
[data-section-seed="53"] .foxing-layer::before { top: 35%; left: 12%; width: 14px; height: 14px; }
[data-section-seed="53"] .foxing-layer::after { top: 55%; right: 8%; width: 9px; height: 9px; }
[data-section-seed="71"] .foxing-layer::before { top: 10%; left: 60%; width: 11px; height: 11px; }
[data-section-seed="71"] .foxing-layer::after { top: 80%; right: 40%; width: 7px; height: 7px; }

/* ---- Colophon ---- */
.colophon-section {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--leather-umber);
    background-image:
        radial-gradient(circle at 50% 50%, rgba(59,34,24,0.9) 0%, transparent 70%);
    padding: 64px 24px;
}

.colophon-content {
    text-align: center;
    max-width: 500px;
}

.colophon-fleuron {
    width: 48px;
    height: 48px;
    margin: 0 auto 24px;
    display: block;
}

.colophon-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: 1.8rem;
    letter-spacing: 0.08em;
    color: var(--venetian-gold);
    margin-bottom: 8px;
}

.colophon-date {
    font-family: 'Cormorant SC', serif;
    font-weight: 500;
    font-size: 1rem;
    letter-spacing: 0.15em;
    color: var(--aged-brass);
    margin-bottom: 24px;
}

.colophon-note {
    font-family: 'Crimson Pro', serif;
    font-size: 0.9rem;
    color: var(--foxed-ivory);
    line-height: 1.8;
    margin-bottom: 32px;
}

/* ---- Wax Seal ---- */
.wax-seal-colophon {
    width: 48px;
    height: 48px;
    border-radius: 47% 53% 49% 51% / 52% 48% 50% 50%;
    background: var(--crimson-ribbon);
    background-image: radial-gradient(circle at 40% 35%, rgba(255,255,255,0.2) 0%, transparent 50%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.wax-seal-colophon:hover {
    transform: scale(1.08);
    box-shadow: 0 0 20px rgba(197,165,90,0.2);
}

.wax-seal-colophon:active {
    transform: scale(0.95);
}

.seal-initial {
    font-family: 'Cormorant SC', serif;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--parchment-cream);
}

/* ---- Responsive ---- */
@media (max-width: 1400px) {
    .marginalia-col {
        display: none;
    }
}

@media (max-width: 960px) {
    .folio-spread {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 0 24px;
    }

    .folio-spread[data-spread="verso"] {
        grid-template-columns: 1fr;
    }

    .folio-spread[data-spread="verso"] .plate-panel {
        order: -1;
    }

    .bookmark-ribbon {
        display: none;
    }

    .chapter-section {
        padding: 48px 0;
    }
}

@media (max-width: 600px) {
    .cover-title {
        font-size: clamp(1.8rem, 8vw, 3rem);
        letter-spacing: 0.06em;
    }

    .chapter-title {
        font-size: clamp(1.5rem, 5vw, 2rem);
    }
}