/* ===== CSS Custom Properties ===== */
:root {
    --color-mahogany: #1A1209;
    --color-vellum: #FAF4E8;
    --color-parchment: #F2EBD9;
    --color-ink: #3B2B19;
    --color-foxed: #6B5B45;
    --color-wax: #9B2335;
    --color-brass: #8B7355;
    --color-gold: #C8A84E;
    --color-glow: #E8D5B5;
    --color-dark: #0D0A05;
    --color-dark-alt: #2C1810;
    --color-shadow: rgba(59, 43, 25, 0.12);
    --color-wax-dark: #7A1A28;
    --card-scale-hover: 1.035;
    --card-entrance-duration: 450ms;
    --card-entrance-easing: cubic-bezier(0.33, 0, 0.2, 1);
    --typewriter-speed: 80ms;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 17px;
}

body {
    font-family: 'Source Serif 4', 'Georgia', serif;
    font-weight: 400;
    color: var(--color-ink);
    background-color: var(--color-dark);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Film Grain Overlay ===== */
#film-grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.02;
    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='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
    background-size: 256px 256px;
    animation: grain 0.25s steps(3) infinite;
}

@keyframes grain {
    0% { background-position: 0 0; }
    33% { background-position: -64px -32px; }
    66% { background-position: 32px -64px; }
    100% { background-position: 0 0; }
}

/* ===== Vignette ===== */
#vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    background: radial-gradient(ellipse at center, transparent 50%, rgba(26, 18, 9, 0.15) 100%);
}

/* ===== ACT I: Title Sequence ===== */
#title-sequence {
    position: relative;
    width: 100%;
    height: 100vh;
    background-color: var(--color-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    overflow: hidden;
    will-change: opacity, filter;
}

/* Letterbox Bars */
.letterbox {
    position: absolute;
    left: 0;
    width: 100%;
    height: 16px;
    background-color: var(--color-dark);
    z-index: 20;
    transition: transform 0.8s cubic-bezier(0.33, 0, 0.2, 1);
}

.letterbox-top {
    top: 0;
}

.letterbox-bottom {
    bottom: 0;
}

.letterbox.hidden {
    transform: translateY(-100%);
}

.letterbox-bottom.hidden {
    transform: translateY(100%);
}

/* Title Content */
.title-content {
    text-align: center;
    position: relative;
    z-index: 15;
    padding: 0 24px;
}

.title-text {
    font-family: 'Playfair Display', 'Georgia', serif;
    font-weight: 700;
    font-size: clamp(36px, 6vw, 80px);
    color: var(--color-glow);
    letter-spacing: 0.03em;
    line-height: 1.15;
    display: inline;
    white-space: nowrap;
}

#typewriter-cursor {
    display: inline-block;
    width: 2px;
    height: clamp(36px, 6vw, 80px);
    background-color: var(--color-gold);
    vertical-align: text-bottom;
    margin-left: 2px;
    animation: blink 530ms step-end infinite;
    opacity: 0;
}

#typewriter-cursor.visible {
    opacity: 1;
}

#typewriter-cursor.fade-out {
    animation: cursorFadeOut 800ms ease forwards;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

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

.subtitle-text {
    font-family: 'Source Serif 4', 'Georgia', serif;
    font-style: italic;
    font-weight: 400;
    font-size: 18px;
    color: var(--color-glow);
    opacity: 0;
    margin-top: 40px;
    transition: opacity 800ms ease;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.65;
}

.subtitle-text.visible {
    opacity: 0.5;
}

/* ===== ACT II: The Archive ===== */
#archive {
    position: relative;
    background-color: var(--color-vellum);
    padding: 80px 0 120px;
    min-height: 100vh;
}

.archive-bg-texture {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 200%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='paper'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.04' numOctaves='5' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23paper)' opacity='0.8'/%3E%3C/svg%3E");
    background-size: 512px 512px;
    will-change: transform;
}

/* ===== Ornamental Rules ===== */
.ornamental-rule {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 300px;
    max-width: 80%;
    margin: 0 auto 60px;
    position: relative;
    z-index: 1;
}

.ornamental-rule-bottom {
    margin: 60px auto;
}

.ornamental-rule::before,
.ornamental-rule::after {
    content: '';
    flex: 1;
    display: block;
}

.ornamental-rule::before {
    border-top: 1px solid var(--color-brass);
    border-bottom: 2px solid var(--color-brass);
    height: 6px;
    margin-right: 16px;
}

.ornamental-rule::after {
    border-top: 1px solid var(--color-brass);
    border-bottom: 2px solid var(--color-brass);
    height: 6px;
    margin-left: 16px;
}

.rule-diamond {
    display: block;
    width: 10px;
    height: 10px;
    background-color: var(--color-brass);
    transform: rotate(45deg);
    flex-shrink: 0;
}

/* ===== Card Grid ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 32px 24px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    position: relative;
    z-index: 1;
}

/* ===== Card Base ===== */
.card {
    position: relative;
    border: 1px solid var(--color-brass);
    box-shadow: inset 0 0 0 2px var(--color-shadow);
    padding: 24px 20px 20px;
    border-top: 3px solid var(--color-wax);
    transform: scale(0.92);
    opacity: 0.3;
    transition: transform var(--card-entrance-duration) var(--card-entrance-easing),
                opacity var(--card-entrance-duration) var(--card-entrance-easing),
                box-shadow 280ms cubic-bezier(0.34, 1.56, 0.64, 1),
                border-top-color 280ms ease;
    overflow: hidden;
}

/* Paper grain on cards */
.card > .card-grain {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='cardgrain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.2' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23cardgrain)' fill='%238B7355'/%3E%3C/svg%3E");
    background-size: 200px 200px;
    transition: opacity 280ms ease;
    z-index: 0;
}

/* Using ::after for card grain */
.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='cardgrain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.2' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23cardgrain)' fill='%238B7355'/%3E%3C/svg%3E");
    background-size: 200px 200px;
    transition: opacity 280ms ease;
    z-index: 0;
}

.card.visible {
    transform: scale(1);
    opacity: 1;
}

/* Hover */
@media (hover: hover) {
    .card:hover {
        transform: scale(var(--card-scale-hover));
        box-shadow: 0 8px 24px rgba(59, 43, 25, 0.2);
        border-top-color: var(--color-gold);
        z-index: 5;
    }

    .card:hover::after {
        opacity: 0.06;
    }
}

/* ===== Card Sizes ===== */
.card-wide {
    grid-column: span 6;
}

.card-medium {
    grid-column: span 4;
}

.card-narrow {
    grid-column: span 3;
}

/* ===== Card Variants ===== */
.card-vellum {
    background-color: var(--color-vellum);
}

.card-parchment {
    background-color: var(--color-parchment);
}

.card-dark {
    background-color: var(--color-dark-alt);
}

.card-dark .card-title,
.card-dark .card-body {
    color: var(--color-glow);
}

.card-dark .card-classification {
    color: #D4C4A8;
}

.card-dark .card-date {
    color: #D4C4A8;
    opacity: 0.7;
}

/* ===== Foxing Spots (on parchment cards) ===== */
.card-parchment::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(circle 4px at var(--fox-x1, 20%) var(--fox-y1, 30%), rgba(200, 168, 78, 0.12) 0%, transparent 100%),
        radial-gradient(circle 6px at var(--fox-x2, 70%) var(--fox-y2, 60%), rgba(200, 168, 78, 0.08) 0%, transparent 100%),
        radial-gradient(circle 3px at var(--fox-x3, 45%) var(--fox-y3, 80%), rgba(200, 168, 78, 0.1) 0%, transparent 100%),
        radial-gradient(circle 5px at var(--fox-x4, 85%) var(--fox-y4, 15%), rgba(200, 168, 78, 0.09) 0%, transparent 100%);
}

/* ===== Card Classification ===== */
.card-classification {
    display: block;
    font-family: 'Libre Baskerville', 'Georgia', serif;
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-foxed);
    opacity: 0.8;
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
}

/* ===== Card Title ===== */
.card-title {
    font-family: 'Playfair Display', 'Georgia', serif;
    font-weight: 400;
    font-size: clamp(20px, 2.5vw, 28px);
    color: var(--color-mahogany);
    letter-spacing: 0.03em;
    line-height: 1.3;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

/* ===== Card Body ===== */
.card-body {
    font-family: 'Source Serif 4', 'Georgia', serif;
    font-weight: 400;
    font-size: 17px;
    line-height: 1.65;
    color: var(--color-ink);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

/* Paragraph spacing */
.card-body + .card-body {
    margin-top: 1.2em;
}

/* Typewriter impression on narrow cards */
.card-narrow .card-body {
    text-shadow: 0.5px 0.5px 0 rgba(59, 43, 25, 0.2);
}

/* ===== Card Date ===== */
.card-date {
    display: block;
    font-family: 'Libre Baskerville', 'Georgia', serif;
    font-style: italic;
    font-size: 13px;
    color: var(--color-foxed);
    opacity: 0.8;
    position: relative;
    z-index: 1;
}

/* ===== Card Footnote ===== */
.card-footnote {
    position: absolute;
    bottom: 16px;
    right: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: 1px solid var(--color-wax);
    border-radius: 50%;
    font-family: 'Libre Baskerville', 'Georgia', serif;
    font-size: 11px;
    color: var(--color-wax);
    z-index: 1;
}

/* ===== Marginalia ===== */
.marginalia {
    position: absolute;
    left: -8px;
    top: 20px;
    font-family: 'Libre Baskerville', 'Georgia', serif;
    font-style: italic;
    font-size: 18px;
    color: var(--color-wax);
    z-index: 1;
}

/* ===== Card Seal ===== */
.card-seal {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--color-wax);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Playfair Display', 'Georgia', serif;
    font-size: 20px;
    color: var(--color-wax);
    z-index: 2;
}

.card-seal::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    bottom: 2px;
    border: 1px solid var(--color-gold);
    border-radius: 50%;
}

.card-dark .card-seal {
    color: var(--color-gold);
    border-color: var(--color-gold);
}

.card-dark .card-seal::before {
    border-color: var(--color-wax);
}

/* ===== Ribbon Bookmark ===== */
.ribbon {
    position: absolute;
    top: 0;
    right: 72px;
    width: 24px;
    height: 60px;
    background-color: var(--color-wax);
    z-index: 2;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 80%, 0 100%);
}

.ribbon::after {
    content: '';
    position: absolute;
    top: 0;
    right: -4px;
    width: 4px;
    height: 12px;
    background-color: var(--color-wax-dark);
}

/* ===== Deckled Edge Mask ===== */
.card {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='400'%3E%3Cdefs%3E%3Cfilter id='rough'%3E%3CfeTurbulence type='turbulence' baseFrequency='0.04' numOctaves='4' seed='2'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='4'/%3E%3C/filter%3E%3C/defs%3E%3Crect x='2' y='2' width='596' height='396' fill='white' rx='1' filter='url(%23rough)'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='400'%3E%3Cdefs%3E%3Cfilter id='rough'%3E%3CfeTurbulence type='turbulence' baseFrequency='0.04' numOctaves='4' seed='2'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='4'/%3E%3C/filter%3E%3C/defs%3E%3Crect x='2' y='2' width='596' height='396' fill='white' rx='1' filter='url(%23rough)'/%3E%3C/svg%3E");
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
}

/* ===== Footnote Apparatus ===== */
.footnote-apparatus {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 40px 0;
    border-top: 1px solid var(--color-brass);
    position: relative;
    z-index: 1;
}

.footnote {
    font-family: 'Source Serif 4', 'Georgia', serif;
    font-weight: 300;
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-foxed);
    margin-bottom: 12px;
    padding-left: 28px;
    position: relative;
}

.footnote-number {
    position: absolute;
    left: 0;
    top: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: 1px solid var(--color-wax);
    border-radius: 50%;
    font-family: 'Libre Baskerville', 'Georgia', serif;
    font-size: 10px;
    color: var(--color-wax);
}

/* ===== Responsive: Tablet ===== */
@media screen and (max-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(6, 1fr);
        padding: 0 24px;
    }

    .card-wide {
        grid-column: span 6;
    }

    .card-medium {
        grid-column: span 3;
    }

    .card-narrow {
        grid-column: span 3;
    }
}

/* ===== Responsive: Mobile ===== */
@media screen and (max-width: 640px) {
    .card-grid {
        grid-template-columns: 1fr;
        padding: 0 16px;
        gap: 24px;
    }

    .card-wide,
    .card-medium,
    .card-narrow {
        grid-column: span 1;
    }

    .marginalia {
        left: 4px;
        top: 4px;
        font-size: 14px;
    }

    .footnote-apparatus {
        padding: 24px 16px 0;
    }

    #archive {
        padding: 60px 0 80px;
    }

    .ornamental-rule {
        margin-bottom: 40px;
    }

    .ornamental-rule-bottom {
        margin: 40px auto;
    }
}