/* =====================================================
   scientific.quest - A Cabinet of Natural Philosophy
   Aesthetic: Botanical | Tone: Luxurious
   Layout: Layered-depth | Palette: Navy-metallic
   ===================================================== */

:root {
    --navy-deep: #1B2A4A;
    --metallic-silver: #A0B0C0;
    --brass-gold: #C8A050;
    --specimen-cream: #F5ECD7;
    --botanical-green: #4A7B5A;
    --label-brown: #6B5A45;
    --ink-dark: #0A1428;

    --paper-grad-1: #F5ECD7;
    --paper-grad-2: #EADFC4;
    --paper-grad-3: #DDCFAE;

    --easing-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --easing-soft: cubic-bezier(0.4, 0, 0.2, 1);

    --font-display: "Playfair Display", "Lora", serif;
    --font-body: "Crimson Pro", "Lora", Georgia, serif;
    --font-mono: "Space Mono", "Courier New", monospace;

    --maxw: 1240px;
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--navy-deep);
    color: var(--specimen-cream);
    font-family: var(--font-body);
    font-size: clamp(16px, 1.5vw, 18px);
    line-height: 1.85;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Global noise texture (3% opacity) - generated via SVG fractal noise */
.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
    opacity: 0.04;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.6 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

/* =====================================================
   THE CABINET (Hero)
   ===================================================== */

.cabinet {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(160,176,192,0.08), transparent 55%),
        radial-gradient(ellipse at 70% 80%, rgba(200,160,80,0.05), transparent 60%),
        linear-gradient(135deg, #1B2A4A 0%, #15233E 35%, #1B2A4A 60%, #0F1A33 100%);
    padding: 4rem clamp(1.25rem, 4vw, 4rem);
    isolation: isolate;
}

.cabinet::before {
    /* metallic sheen */
    content: "";
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            115deg,
            transparent 0,
            transparent 80px,
            rgba(160,176,192,0.025) 80px,
            rgba(160,176,192,0.025) 82px
        );
    pointer-events: none;
    z-index: 1;
}

.cabinet::after {
    /* ornate frame inset */
    content: "";
    position: absolute;
    inset: 1.5rem;
    border: 1px solid rgba(160,176,192,0.18);
    box-shadow: inset 0 0 0 4px rgba(27,42,74,0.4), inset 0 0 0 5px rgba(200,160,80,0.18);
    pointer-events: none;
    z-index: 2;
}

.layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.layer-bg { z-index: 1; }
.layer-mid { z-index: 2; opacity: 0.55; }
.layer-fg {
    position: relative;
    z-index: 3;
    pointer-events: auto;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    min-height: calc(100vh - 8rem);
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 2rem 0 1rem;
    gap: 2rem;
}

.tech-grid { width: 100%; height: 100%; }

.botanical-fern {
    position: absolute;
    right: 4%;
    bottom: 0;
    height: 92%;
    width: auto;
    opacity: 0.65;
    filter: drop-shadow(0 0 10px rgba(74,123,90,0.18));
}

.draw-path {
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    transition: stroke-dashoffset 2.4s var(--easing-soft);
}

.is-drawn .draw-path {
    stroke-dashoffset: 0;
}

.cabinet-content { padding-top: 1rem; }

.cabinet-header {
    grid-row: 1;
    text-align: left;
    max-width: 760px;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 1.2s 0.6s var(--easing-soft), transform 1.2s 0.6s var(--easing-soft);
}

.is-loaded .cabinet-header { opacity: 1; transform: translateY(0); }

.taxon-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.32em;
    color: var(--brass-gold);
    border-top: 1px solid var(--brass-gold);
    border-bottom: 1px solid var(--brass-gold);
    padding: 0.4rem 0.9rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.wordmark {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(40px, 7.5vw, 92px);
    line-height: 1;
    letter-spacing: -0.01em;
    color: var(--specimen-cream);
    margin-bottom: 1.25rem;
    text-shadow: 0 2px 24px rgba(10,20,40,0.6);
}

.wordmark-prefix { font-style: italic; font-weight: 400; color: var(--specimen-cream); }
.wordmark-dot { color: var(--brass-gold); padding: 0 0.04em; }
.wordmark-suffix { font-weight: 700; color: var(--specimen-cream); }

.cabinet-subtitle {
    font-family: var(--font-body);
    font-size: clamp(16px, 1.4vw, 19px);
    line-height: 1.65;
    color: rgba(245,236,215,0.82);
    max-width: 540px;
    font-style: italic;
}

/* Floating specimen labels */
.specimen-labels {
    grid-row: 2;
    position: relative;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.6rem;
    align-self: center;
    align-items: start;
    padding: 1rem 0;
    perspective: 1200px;
    transform-style: preserve-3d;
    max-width: 720px;
    width: 100%;
}

.specimen-label {
    --depth-offset: 0px;
    position: relative;
    background:
        linear-gradient(135deg, var(--paper-grad-1) 0%, var(--paper-grad-2) 60%, var(--paper-grad-3) 100%);
    color: var(--label-brown);
    padding: 1rem 1.1rem 0.85rem;
    border-radius: 2px 14px 3px 12px;
    box-shadow:
        0 1px 0 rgba(255,255,255,0.5) inset,
        0 -1px 0 rgba(107,90,69,0.22) inset,
        0 8px 22px rgba(10,20,40,0.45),
        0 2px 4px rgba(10,20,40,0.3);
    transform: translateY(var(--depth-offset)) translateZ(0);
    transition:
        transform 0.42s var(--easing-spring),
        box-shadow 0.32s var(--easing-soft),
        opacity 0.6s var(--easing-soft);
    opacity: 0;
    transform-style: preserve-3d;
    will-change: transform;
}

.specimen-label::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 10%, rgba(255,255,255,0.4), transparent 50%),
        radial-gradient(ellipse at 80% 90%, rgba(107,90,69,0.18), transparent 55%);
    border-radius: inherit;
    pointer-events: none;
    mix-blend-mode: multiply;
    opacity: 0.7;
}

.specimen-label::after {
    /* corner curl */
    content: "";
    position: absolute;
    bottom: 0;
    right: 0;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, transparent 50%, rgba(107,90,69,0.22) 50%, rgba(107,90,69,0.32) 75%, var(--paper-grad-3) 100%);
    border-bottom-right-radius: 12px;
    pointer-events: none;
}

.is-loaded .specimen-label { opacity: 1; }

.specimen-label[data-depth="1"] { --depth-offset: 0px; transition-delay: 0.9s; }
.specimen-label[data-depth="2"] { --depth-offset: -10px; transition-delay: 1.1s; }
.specimen-label[data-depth="3"] { --depth-offset: -20px; transition-delay: 1.3s; }

.specimen-label:hover {
    transform: translateY(calc(var(--depth-offset) - 6px)) translateZ(20px) scale(1.02);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.5) inset,
        0 -1px 0 rgba(107,90,69,0.22) inset,
        0 18px 40px rgba(10,20,40,0.55),
        0 6px 10px rgba(10,20,40,0.35);
}

.specimen-label__head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 1px dashed rgba(107,90,69,0.45);
    padding-bottom: 0.35rem;
    margin-bottom: 0.5rem;
}

.specimen-label__no,
.specimen-label__class {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--label-brown);
    text-transform: uppercase;
}

.specimen-label__class { color: var(--brass-gold); font-weight: 700; }

.specimen-label__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-style: italic;
    font-size: 19px;
    color: var(--ink-dark);
    line-height: 1.2;
    margin: 0.1rem 0 0.3rem;
}

.specimen-label__binomial {
    font-family: var(--font-body);
    font-size: 12.5px;
    line-height: 1.45;
    color: var(--label-brown);
    margin-bottom: 0.6rem;
}

.specimen-label__binomial em {
    font-style: italic;
    color: var(--ink-dark);
}

.specimen-label__sketch {
    width: 70px;
    height: 50px;
    margin-left: auto;
    opacity: 0.85;
}

.cabinet-meta {
    grid-row: 3;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem 1.5rem;
    padding: 0.6rem 0;
    border-top: 1px solid rgba(160,176,192,0.22);
    border-bottom: 1px solid rgba(160,176,192,0.22);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.24em;
    color: var(--metallic-silver);
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 1s 1.6s var(--easing-soft), transform 1s 1.6s var(--easing-soft);
}

.is-loaded .cabinet-meta { opacity: 0.85; transform: translateY(0); }

.meta-divider { color: var(--brass-gold); opacity: 0.7; }

.cabinet-wires {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    filter: drop-shadow(0 0 2px rgba(160,176,192,0.3));
}

.wire {
    stroke-dasharray: 1500;
    stroke-dashoffset: 1500;
    transition: stroke-dashoffset 1.6s var(--easing-soft);
}

.is-drawn .wire { stroke-dashoffset: 0; }

.wire-node {
    opacity: 0;
    transition: opacity 0.6s 1.4s var(--easing-soft);
}

.is-drawn .wire-node { opacity: 1; }

.circuit-line {
    stroke-dasharray: 1700;
    stroke-dashoffset: 1700;
    transition: stroke-dashoffset 1.8s 0.2s var(--easing-soft);
}

.is-drawn .circuit-line { stroke-dashoffset: 0; }

.circuit-node {
    opacity: 0;
    transition: opacity 0.6s 1.6s var(--easing-soft);
}

.is-drawn .circuit-node { opacity: 1; }

/* =====================================================
   EXPEDITION CHAPTERS
   ===================================================== */

.chapters {
    position: relative;
    background: linear-gradient(180deg, #1B2A4A 0%, #182542 100%);
    padding: 6rem clamp(1.25rem, 4vw, 4rem) 8rem;
}

.chapter-rule {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 5rem;
    color: var(--brass-gold);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.4em;
    text-transform: uppercase;
}

.chapter-rule::before,
.chapter-rule::after {
    content: "";
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--metallic-silver), transparent);
    max-width: 360px;
}

.rule-mark {
    font-size: 18px;
    color: var(--brass-gold);
}

.chapter {
    position: relative;
    max-width: var(--maxw);
    margin: 0 auto 7rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
    align-items: center;
    gap: 3rem;
    min-height: 540px;
    isolation: isolate;
}

.chapter:last-child { margin-bottom: 0; }

.chapter--reverse .chapter__layer--mid { order: 2; }
.chapter--reverse .chapter__layer--fg { order: 1; grid-column: 1; }
.chapter--reverse .chapter__layer--mid { grid-column: 2; }

.chapter__layer {
    position: relative;
}

.chapter__layer--bg {
    position: absolute;
    inset: -2rem;
    z-index: 0;
    pointer-events: none;
}

.depth-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(160,176,192,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(160,176,192,0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.chapter__layer--mid {
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
    grid-column: 1;
    grid-row: 1;
}

.chapter-illus {
    width: 100%;
    max-width: 460px;
    height: auto;
    aspect-ratio: 1 / 1;
    filter: drop-shadow(0 0 8px rgba(74,123,90,0.18));
}

.chapter__layer--fg {
    z-index: 2;
    grid-column: 2;
    grid-row: 1;
}

/* Paper-aged card */
.paper-card {
    position: relative;
    background:
        linear-gradient(135deg, var(--paper-grad-1) 0%, var(--paper-grad-2) 55%, var(--paper-grad-3) 100%);
    color: var(--label-brown);
    padding: 2.4rem 2.4rem 2rem;
    border-radius: 4px 18px 6px 16px;
    box-shadow:
        0 1px 0 rgba(255,255,255,0.55) inset,
        0 -1px 0 rgba(107,90,69,0.22) inset,
        0 22px 50px rgba(10,20,40,0.5),
        0 6px 14px rgba(10,20,40,0.32);
    transform-style: preserve-3d;
    transition:
        transform 0.42s var(--easing-spring),
        box-shadow 0.32s var(--easing-soft);
    opacity: 0;
    transform: translateY(28px);
}

.paper-card.is-revealed {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.9s var(--easing-soft),
        transform 0.9s var(--easing-soft),
        box-shadow 0.32s var(--easing-soft);
}

.paper-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 18% 12%, rgba(255,255,255,0.45), transparent 50%),
        radial-gradient(ellipse at 84% 88%, rgba(107,90,69,0.16), transparent 60%),
        radial-gradient(circle at 50% 50%, transparent 65%, rgba(107,90,69,0.07) 100%);
    border-radius: inherit;
    pointer-events: none;
    mix-blend-mode: multiply;
    opacity: 0.85;
}

.paper-card::after {
    /* corner curl */
    content: "";
    position: absolute;
    bottom: 0;
    right: 0;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, transparent 50%, rgba(107,90,69,0.18) 50%, rgba(107,90,69,0.32) 78%, var(--paper-grad-3) 100%);
    border-bottom-right-radius: 16px;
    pointer-events: none;
}

.paper-card:hover {
    transform: translateY(-6px) translateZ(20px) scale(1.015);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.55) inset,
        0 -1px 0 rgba(107,90,69,0.22) inset,
        0 36px 64px rgba(10,20,40,0.6),
        0 12px 22px rgba(10,20,40,0.4);
}

.paper-card__taxon {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.3em;
    color: var(--brass-gold);
    border-top: 1px solid var(--brass-gold);
    border-bottom: 1px solid var(--brass-gold);
    padding: 0.3rem 0.7rem;
    margin-bottom: 1.2rem;
    text-transform: uppercase;
}

.chapter-card__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(26px, 3.4vw, 38px);
    color: var(--ink-dark);
    line-height: 1.15;
    margin-bottom: 1rem;
    letter-spacing: -0.005em;
}

.chapter-card__lede {
    font-family: var(--font-body);
    font-size: clamp(15.5px, 1.2vw, 17.5px);
    font-style: italic;
    color: var(--label-brown);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.chapter-card__body {
    font-family: var(--font-body);
    font-size: clamp(14.5px, 1.05vw, 16px);
    color: var(--label-brown);
    line-height: 1.75;
    margin-bottom: 1.6rem;
}

.chapter-data {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem 1rem;
    padding: 0.9rem 0;
    border-top: 1px dashed rgba(107,90,69,0.45);
    border-bottom: 1px dashed rgba(107,90,69,0.45);
    margin-bottom: 1rem;
}

.chapter-data > div {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.chapter-data dt {
    font-family: var(--font-mono);
    font-size: 9.5px;
    letter-spacing: 0.22em;
    color: var(--brass-gold);
    text-transform: uppercase;
    font-weight: 700;
}

.chapter-data dd {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--ink-dark);
    line-height: 1.3;
}

.paper-card__seal {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.32em;
    color: var(--label-brown);
    text-transform: uppercase;
    opacity: 0.7;
    padding-top: 0.25rem;
}

/* =====================================================
   THE LIBRARY (Specimens grid)
   ===================================================== */

.library {
    position: relative;
    background: linear-gradient(180deg, #182542 0%, #131F38 100%);
    padding: 6rem clamp(1.25rem, 4vw, 4rem) 7rem;
    overflow: hidden;
    isolation: isolate;
}

.library::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            115deg,
            transparent 0,
            transparent 80px,
            rgba(160,176,192,0.025) 80px,
            rgba(160,176,192,0.025) 82px
        );
    pointer-events: none;
}

.library__header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 4rem;
    position: relative;
    z-index: 2;
}

.library__taxon {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.32em;
    color: var(--brass-gold);
    border-top: 1px solid var(--brass-gold);
    border-bottom: 1px solid var(--brass-gold);
    padding: 0.3rem 0.7rem;
    margin-bottom: 1.4rem;
    text-transform: uppercase;
}

.library__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(28px, 4.5vw, 56px);
    color: var(--specimen-cream);
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: -0.005em;
}

.library__lede {
    font-family: var(--font-body);
    font-style: italic;
    font-size: clamp(15px, 1.2vw, 17.5px);
    color: rgba(245,236,215,0.78);
    line-height: 1.65;
}

.library__wires {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.45;
    pointer-events: none;
    filter: drop-shadow(0 0 2px rgba(160,176,192,0.3));
}

.library__grid {
    position: relative;
    z-index: 2;
    max-width: var(--maxw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.6rem;
    perspective: 1400px;
    transform-style: preserve-3d;
}

.specimen-card {
    position: relative;
    background:
        linear-gradient(135deg, var(--paper-grad-1) 0%, var(--paper-grad-2) 55%, var(--paper-grad-3) 100%);
    color: var(--label-brown);
    padding: 1.4rem 1.4rem 1.2rem;
    border-radius: 3px 16px 4px 14px;
    box-shadow:
        0 1px 0 rgba(255,255,255,0.5) inset,
        0 -1px 0 rgba(107,90,69,0.22) inset,
        0 14px 32px rgba(10,20,40,0.45),
        0 4px 8px rgba(10,20,40,0.28);
    transform-style: preserve-3d;
    transition:
        transform 0.42s var(--easing-spring),
        box-shadow 0.32s var(--easing-soft),
        opacity 0.7s var(--easing-soft);
    opacity: 0;
    transform: translateY(24px) rotateX(2deg);
    cursor: default;
    will-change: transform;
}

.specimen-card.is-revealed {
    opacity: 1;
    transform: translateY(0) rotateX(0);
}

.specimen-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 22% 14%, rgba(255,255,255,0.45), transparent 50%),
        radial-gradient(ellipse at 80% 86%, rgba(107,90,69,0.18), transparent 55%),
        radial-gradient(circle at 50% 50%, transparent 70%, rgba(107,90,69,0.07) 100%);
    border-radius: inherit;
    pointer-events: none;
    mix-blend-mode: multiply;
    opacity: 0.78;
}

.specimen-card::after {
    content: "";
    position: absolute;
    bottom: 0;
    right: 0;
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, transparent 50%, rgba(107,90,69,0.2) 50%, rgba(107,90,69,0.32) 78%, var(--paper-grad-3) 100%);
    border-bottom-right-radius: 14px;
    pointer-events: none;
}

.specimen-card:hover {
    transform: translateY(-6px) translateZ(24px) scale(1.025);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.5) inset,
        0 -1px 0 rgba(107,90,69,0.22) inset,
        0 28px 56px rgba(10,20,40,0.6),
        0 10px 18px rgba(10,20,40,0.4);
}

.specimen-card__head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 1px dashed rgba(107,90,69,0.45);
    padding-bottom: 0.45rem;
    margin-bottom: 0.7rem;
}

.specimen-card__no {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.22em;
    color: var(--label-brown);
    text-transform: uppercase;
}

.specimen-card__class {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.22em;
    color: var(--brass-gold);
    text-transform: uppercase;
}

.specimen-card__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-style: italic;
    font-size: 22px;
    color: var(--ink-dark);
    line-height: 1.18;
    margin-bottom: 0.35rem;
}

.specimen-card__binomial {
    font-family: var(--font-body);
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--label-brown);
    margin-bottom: 1rem;
}

.specimen-card__binomial em { font-style: italic; color: var(--ink-dark); }

.specimen-card__svg {
    width: 100%;
    height: 96px;
    margin-bottom: 0.7rem;
}

.specimen-card__svg path,
.specimen-card__svg circle,
.specimen-card__svg rect,
.specimen-card__svg line,
.specimen-card__svg ellipse {
    transition: stroke 0.3s var(--easing-soft);
}

.specimen-card__data {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem 0.8rem;
    padding-top: 0.6rem;
    border-top: 1px dashed rgba(107,90,69,0.45);
    margin-top: 0.4rem;
}

.specimen-card__data > div {
    display: flex;
    flex-direction: column;
}

.specimen-card__data dt {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.22em;
    color: var(--brass-gold);
    text-transform: uppercase;
    font-weight: 700;
}

.specimen-card__data dd {
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--ink-dark);
    line-height: 1.3;
}

.library__footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 5rem;
    position: relative;
    z-index: 2;
}

.library__rule {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--metallic-silver), transparent);
    max-width: 320px;
}

.library__legend {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.36em;
    color: var(--metallic-silver);
    text-transform: uppercase;
}

/* =====================================================
   OBSERVATORY FOOTER
   ===================================================== */

.observatory {
    position: relative;
    background: linear-gradient(180deg, #131F38 0%, #0A1428 100%);
    padding: 5rem clamp(1.25rem, 4vw, 4rem) 3rem;
    overflow: hidden;
    isolation: isolate;
}

.observatory__layer--bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(160,176,192,0.06), transparent 60%),
        radial-gradient(ellipse at 80% 80%, rgba(200,160,80,0.04), transparent 65%),
        repeating-linear-gradient(
            115deg,
            transparent 0,
            transparent 80px,
            rgba(160,176,192,0.02) 80px,
            rgba(160,176,192,0.02) 82px
        );
    pointer-events: none;
}

.observatory__layer--fg {
    position: relative;
    z-index: 2;
    max-width: var(--maxw);
    margin: 0 auto;
}

.observatory__columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.observatory__column {
    border-left: 1px solid rgba(160,176,192,0.18);
    padding-left: 1.5rem;
}

.observatory__taxon {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.32em;
    color: var(--brass-gold);
    margin-bottom: 0.9rem;
    text-transform: uppercase;
}

.observatory__heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(22px, 2.4vw, 28px);
    color: var(--specimen-cream);
    line-height: 1.2;
    margin-bottom: 0.7rem;
    letter-spacing: -0.005em;
}

.observatory__note {
    font-family: var(--font-body);
    font-size: 14.5px;
    color: rgba(245,236,215,0.7);
    line-height: 1.6;
}

.observatory__list {
    list-style: none;
    display: grid;
    gap: 0.45rem;
}

.observatory__list li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px dotted rgba(160,176,192,0.2);
    padding-bottom: 0.35rem;
}

.obs-key {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.22em;
    color: var(--brass-gold);
    text-transform: uppercase;
}

.obs-val {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--metallic-silver);
}

.observatory__dictum {
    font-family: var(--font-display);
    font-style: italic;
    font-size: clamp(20px, 2vw, 26px);
    color: var(--brass-gold);
    line-height: 1.3;
    margin-bottom: 0.7rem;
}

.observatory__rule {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--metallic-silver) 25%, var(--brass-gold) 50%, var(--metallic-silver) 75%, transparent);
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.observatory__base {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.2rem;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.32em;
    color: var(--metallic-silver);
    text-transform: uppercase;
    opacity: 0.75;
}

.observatory__base-mark {
    color: var(--brass-gold);
    font-size: 14px;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */

@media (max-width: 900px) {
    .chapter {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        min-height: auto;
    }
    .chapter__layer--mid,
    .chapter__layer--fg,
    .chapter--reverse .chapter__layer--mid,
    .chapter--reverse .chapter__layer--fg {
        grid-column: 1;
    }
    .chapter__layer--mid { order: 1; }
    .chapter__layer--fg { order: 2; }
    .chapter--reverse .chapter__layer--mid { order: 1; }
    .chapter--reverse .chapter__layer--fg { order: 2; }

    .botanical-fern { opacity: 0.35; right: -10%; }

    .layer-fg { padding: 1rem 0; }

    .specimen-labels { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .cabinet { padding: 3rem 1.25rem; }
    .cabinet::after { inset: 0.75rem; }
    .wordmark { font-size: clamp(36px, 11vw, 60px); }
    .cabinet-meta {
        font-size: 10px;
        gap: 0.4rem 0.8rem;
        justify-content: center;
        text-align: center;
    }
    .meta-divider { display: none; }
    .paper-card { padding: 1.8rem 1.6rem 1.5rem; }
    .chapter-data { grid-template-columns: repeat(3, minmax(0, 1fr)); font-size: 11px; }
    .observatory__column { padding-left: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
    .draw-path, .wire, .circuit-line { stroke-dashoffset: 0 !important; transition: none; }
    .specimen-label, .paper-card, .specimen-card {
        transition: none;
        opacity: 1 !important;
        transform: none !important;
    }
    .cabinet-header, .cabinet-meta { opacity: 1 !important; transform: none !important; }
}