/* ============================================
   datatelomere.com — Skeuomorphic Reading Room
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --library-cream: #F5EDE0;
    --aged-parchment: #EDE2D0;
    --sunset-amber: #D4883A;
    --dusk-rose: #C4726C;
    --gilded-bronze: #B8860B;
    --espresso: #3D2B1F;
    --warm-sepia: #5C4A3A;
    --umber-dark: #2A1F14;
    --lamplight-gold: #F0C674;
    --wax-deep: #9E4A48;
    --wax-darker: #7A3030;
    --parchment-mid: #E8D5BC;
    --parchment-end: #E0C8A8;
    --faded-ink: #8B7355;
    --scroll-pct: 0;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Quicksand', sans-serif;
    font-weight: 400;
    font-size: clamp(16px, 1.8vw, 20px);
    line-height: 1.7;
    letter-spacing: 0.01em;
    color: var(--warm-sepia);
    background: linear-gradient(175deg, var(--library-cream) 0%, var(--aged-parchment) 40%, var(--parchment-mid) 70%, var(--parchment-end) 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Hidden SVG defs */
.svg-defs {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* --- Typography --- */
h1, h2, h3 {
    font-family: 'Nunito', sans-serif;
    color: var(--espresso);
    letter-spacing: -0.01em;
    line-height: 1.1;
}

h2 {
    font-weight: 700;
    font-size: clamp(36px, 6vw, 80px);
    margin-bottom: 0.4em;
}

h3 {
    font-weight: 700;
    font-size: clamp(24px, 4vw, 48px);
    margin-bottom: 0.4em;
}

.marginalia {
    font-family: 'Caveat', cursive;
    font-weight: 400;
    font-size: clamp(14px, 1.5vw, 18px);
    color: var(--faded-ink);
    transform: rotate(-2deg);
    line-height: 1.5;
}

/* --- Bookmark Ribbon Scroll Indicator --- */
#bookmark-ribbon {
    position: fixed;
    top: 0;
    right: 12px;
    width: 16px;
    height: calc(var(--scroll-pct) * 1%);
    max-height: 100vh;
    background-color: var(--dusk-rose);
    z-index: 100;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), 50% 100%, 0 calc(100% - 8px));
    box-shadow: -2px 0 4px rgba(0, 0, 0, 0.1);
    transition: height 0.1s linear;
    pointer-events: none;
}

/* --- Desk Scene (Full Viewport Sections) --- */
.desk-scene {
    position: relative;
    min-height: 100vh;
    padding: 80px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- Page Turn Sections --- */
.page-turn-section {
    clip-path: polygon(100% 0, 100% 0, 100% 100%, 100% 100%);
    transition: clip-path 0.8s ease-in-out, filter 0.8s ease-in-out;
}

.page-turn-section.revealed {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.desk-scene.dimmed {
    filter: brightness(0.92);
    transition: filter 0.8s ease-in-out;
}

/* --- Reading Room (Section 1) --- */
#reading-room {
    flex-direction: column;
    background-color: var(--library-cream);
    overflow: hidden;
}

#reading-room .desk-scene-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 50% 50%, rgba(212, 136, 58, 0.08) 0%, transparent 70%),
        radial-gradient(ellipse at 30% 70%, rgba(139, 115, 85, 0.05) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 1.2s ease-in;
}

#reading-room .desk-scene-bg.visible {
    opacity: 0.3;
}

.reading-room-content {
    text-align: center;
    z-index: 10;
    position: relative;
}

.site-title {
    font-family: 'Nunito', sans-serif;
    font-weight: 800;
    font-size: clamp(48px, 8vw, 112px);
    color: var(--espresso);
    letter-spacing: -0.01em;
    line-height: 1.1;
    min-height: 1.2em;
}

.site-title .title-char {
    display: inline-block;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.2s ease-out, transform 0.2s ease-out;
}

.site-title .title-char.visible {
    opacity: 1;
    transform: translateY(0);
}

.site-subtitle {
    font-family: 'Quicksand', sans-serif;
    font-weight: 400;
    font-size: clamp(16px, 2.5vw, 24px);
    color: var(--warm-sepia);
    margin-top: 24px;
    opacity: 0;
    transition: opacity 0.8s ease-in;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.site-subtitle.visible {
    opacity: 1;
}

/* --- Broken Grid Layout --- */
.desk-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

/* --- Content Cards Base --- */
.content-card {
    position: relative;
    padding: 32px;
    transition: transform 0.15s ease-out, box-shadow 0.3s ease;
    will-change: transform;
}

/* Ambient hover glow — Lamplight Gold */
.content-card:hover {
    box-shadow: 0 0 40px 8px rgba(240, 198, 116, 0.15);
}

/* --- Parchment Card --- */
.parchment-card {
    background-color: var(--aged-parchment);
    border-radius: 2px;
    box-shadow: 0 4px 12px rgba(42, 31, 20, 0.15);
    z-index: 10;
}

/* Page-edge texture on right side */
.parchment-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 12px;
    height: 100%;
    background-image: repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 3px,
        rgba(180, 160, 130, 0.15) 3px,
        rgba(180, 160, 130, 0.15) 4px
    );
    border-radius: 0 2px 2px 0;
    pointer-events: none;
}

/* --- Annotation Card --- */
.annotation-card {
    z-index: 20;
    padding: 20px 24px;
    opacity: 0;
    transform: translateX(20px) rotate(-2deg);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out, box-shadow 0.3s ease;
}

.annotation-card.visible {
    opacity: 1;
    transform: translateX(0) rotate(-2deg);
}

/* --- Brass Plate Card --- */
.brass-plate {
    background-color: var(--aged-parchment);
    border: 2px solid var(--gilded-bronze);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3), 0 4px 12px rgba(0, 0, 0, 0.25);
    border-radius: 2px;
    z-index: 10;
}

.plate-heading {
    color: var(--sunset-amber);
    font-size: clamp(20px, 3vw, 36px);
}

/* --- Leather Card --- */
.leather-card {
    background-color: var(--aged-parchment);
    border-radius: 2px;
    box-shadow: 0 4px 12px rgba(42, 31, 20, 0.2);
    z-index: 10;
    padding-left: 48px;
}

.leather-heading {
    color: var(--sunset-amber);
    font-size: clamp(20px, 3vw, 36px);
}

/* Stitched edge on leather cards */
.stitched-edge {
    position: absolute;
    top: 0;
    left: 0;
    width: 16px;
    height: 100%;
    background-image: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 4px,
        #8B6914 4px,
        #8B6914 5px
    );
}

/* --- Brass Corner Brackets --- */
.brass-corners {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.brass-corners::before,
.brass-corners::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--gilded-bronze);
    border-style: solid;
}

.brass-corners::before {
    top: 8px;
    left: 8px;
    border-width: 2px 0 0 2px;
}

.brass-corners::after {
    bottom: 8px;
    right: 8px;
    border-width: 0 2px 2px 0;
}

/* --- Card Placements (Broken Grid) --- */

/* Section 2: The Concept */
.card-1 {
    grid-column: 1 / 8;
    grid-row: 1 / 4;
    transform: rotate(-1deg);
}

.card-2 {
    grid-column: 7 / 12;
    grid-row: 2 / 4;
    z-index: 20;
}

.card-3 {
    grid-column: 3 / 10;
    grid-row: 4 / 6;
    transform: rotate(0.5deg);
}

/* Section 3: The Architecture */
.card-4 {
    grid-column: 2 / 9;
    grid-row: 1 / 4;
    transform: rotate(0.8deg);
}

.card-5 {
    grid-column: 6 / 12;
    grid-row: 3 / 6;
    transform: rotate(-0.5deg);
}

.card-6 {
    grid-column: 1 / 5;
    grid-row: 4 / 6;
}

/* Section 4: The Practice */
.card-7 {
    grid-column: 1 / 5;
    grid-row: 1 / 3;
}

.card-8 {
    grid-column: 4 / 11;
    grid-row: 1 / 4;
    transform: rotate(-0.7deg);
}

.card-9 {
    grid-column: 2 / 8;
    grid-row: 4 / 6;
    transform: rotate(1deg);
}

/* Section 5: The Future */
.card-10 {
    grid-column: 1 / 8;
    grid-row: 1 / 4;
    transform: rotate(0.5deg);
}

.card-11 {
    grid-column: 6 / 13;
    grid-row: 2 / 5;
    transform: rotate(-1deg);
}

.card-12 {
    grid-column: 2 / 6;
    grid-row: 4 / 6;
}

/* --- Card Content Styles --- */
.card-heading {
    color: var(--sunset-amber);
}

.card-body {
    margin-top: 16px;
    color: var(--warm-sepia);
}

.card-list {
    list-style: none;
    margin-top: 16px;
}

.card-list li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(184, 134, 11, 0.2);
    color: var(--warm-sepia);
}

.card-list li:last-child {
    border-bottom: none;
}

.card-list li strong {
    color: var(--espresso);
    font-weight: 500;
}

/* --- Foil Dividers --- */
.foil-divider {
    text-align: center;
    padding: 40px 0;
    position: relative;
}

.foil-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gilded-bronze), transparent);
}

.fleuron {
    position: relative;
    z-index: 1;
    display: inline-block;
    font-size: 24px;
    color: var(--gilded-bronze);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
    background: linear-gradient(175deg, var(--library-cream) 0%, var(--aged-parchment) 100%);
    padding: 0 16px;
}

/* --- The Seal (Final Section) --- */
#the-seal {
    flex-direction: column;
    text-align: center;
}

.seal-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.closing-text {
    font-family: 'Quicksand', sans-serif;
    font-weight: 500;
    font-size: clamp(18px, 2.5vw, 28px);
    color: var(--espresso);
    line-height: 1.6;
    max-width: 600px;
}

#wax-seal {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: radial-gradient(circle at 40% 35%, var(--dusk-rose) 0%, var(--wax-deep) 60%, var(--wax-darker) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(42, 31, 20, 0.3), inset 0 1px 2px rgba(255, 255, 255, 0.15);
}

.seal-monogram {
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    font-size: 20px;
    color: rgba(255, 255, 255, 0.85);
    text-shadow: 0 -1px 1px rgba(0, 0, 0, 0.3);
}

.closing-marginalia {
    font-size: clamp(14px, 1.5vw, 18px);
    color: var(--warm-sepia);
}

/* --- Responsive: Mobile --- */
@media (max-width: 768px) {
    .desk-grid {
        display: flex;
        flex-direction: column;
        gap: 0;
    }

    .content-card {
        width: 100%;
        margin-bottom: 16px;
    }

    .content-card:nth-child(even) {
        margin-top: -32px;
    }

    .card-1, .card-3, .card-4, .card-5,
    .card-8, .card-9, .card-10, .card-11 {
        transform: rotate(-1deg);
    }

    .card-2, .card-6, .card-7, .card-12 {
        transform: rotate(1deg);
    }

    .desk-scene {
        padding: 60px 16px;
    }

    .leather-card {
        padding-left: 40px;
    }
}

/* --- Responsive: Large Screens --- */
@media (min-width: 1440px) {
    .desk-grid {
        max-width: 1400px;
        gap: 32px;
    }

    .content-card {
        padding: 40px;
    }

    .desk-scene {
        padding: 120px 48px;
    }
}