/* ==========================================================================
   The Vanishing 100 — dark nature-luxe editorial design system
   Type: Playfair Display (display) / Inter (text)
   ========================================================================== */

:root {
  /* surfaces */
  --bg: #0a0f0c;
  --bg-deep: #070b09;
  --surface: #101712;
  --surface-2: #16201a;
  --border: rgba(236, 233, 226, 0.09);
  --border-strong: rgba(236, 233, 226, 0.18);

  /* ink */
  --ink: #ece9e2;
  --ink-dim: #a9b4aa;
  --ink-faint: #76837a;

  /* brand */
  --gold: #c9a35c;
  --gold-bright: #e3c285;
  --moss: #7fa08c;

  /* status */
  --cr: #e0654f;
  --ew: #9d8fd8;
  --en: #d9a440;
  --up: #7fc796;
  --down: #e0654f;

  /* type scale */
  --font-display: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-text: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1rem;
  --text-lg: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  --display: clamp(2.5rem, 1.6rem + 4.5vw, 5.2rem);
  --title: clamp(1.9rem, 1.4rem + 2.4vw, 3.2rem);
  --title-sm: clamp(1.25rem, 1.1rem + 0.8vw, 1.7rem);

  /* rhythm */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: clamp(4rem, 3rem + 6vw, 8rem);
  --radius: 14px;
  --radius-lg: 22px;
  --container: 76rem;

  /* motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 180ms;
  --t-med: 320ms;
  --t-slow: 560ms;

  color-scheme: dark;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background:
    radial-gradient(1100px 540px at 85% -8%, rgba(127, 160, 140, 0.07), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(201, 163, 92, 0.05), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.01em;
  min-height: 100dvh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select { font: inherit; }
::selection { background: rgba(201, 163, 92, 0.35); color: #fff; }

/* ---------- a11y ---------- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: -100%; left: 1rem; z-index: 200;
  background: var(--gold); color: #161108; padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius) var(--radius); font-weight: 500; text-decoration: none;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: 0; }
:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- progress ---------- */
.progress {
  position: fixed; inset: 0 0 auto 0; height: 2px; z-index: 150;
  background: transparent; pointer-events: none;
}
.progress span {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--moss), var(--gold));
  transition: width 80ms linear;
}

/* ---------- layout primitives ---------- */
.container { width: min(100% - 2.5rem, var(--container)); margin-inline: auto; }
.kicker {
  font-size: var(--text-xs); font-weight: 500; letter-spacing: 0.32em;
  text-transform: uppercase; color: var(--gold);
  display: flex; align-items: center; gap: 0.9rem;
}
.kicker::before { content: ""; width: 2.4rem; height: 1px; background: var(--gold); opacity: 0.6; }
.display {
  font-family: var(--font-display); font-weight: 500; font-size: var(--display);
  line-height: 1.04; letter-spacing: -0.015em; text-wrap: balance;
}
.display em, .title em { font-style: italic; color: var(--gold-bright); }
.title {
  font-family: var(--font-display); font-weight: 500; font-size: var(--title);
  line-height: 1.12; letter-spacing: -0.01em; text-wrap: balance;
}
.title-sm {
  font-family: var(--font-display); font-weight: 500; font-size: var(--title-sm);
  line-height: 1.2; display: flex; align-items: center; gap: 0.6rem;
}
.title-sm .icon { color: var(--gold); flex: none; }
.lede {
  font-size: var(--text-lg); color: var(--ink-dim); line-height: 1.7;
  max-width: 44rem; text-wrap: pretty;
}
.section-lede { color: var(--ink-dim); max-width: 40rem; margin-top: var(--space-2); }
.icon { width: 1.25rem; height: 1.25rem; }
.icon-sm { width: 1rem; height: 1rem; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.85rem 1.6rem; border-radius: 999px;
  font-weight: 500; font-size: var(--text-sm); letter-spacing: 0.04em;
  text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
  min-height: 44px;
}
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--gold); color: #181206; }
.btn--primary:hover { background: var(--gold-bright); transform: translateY(-2px); }
.btn--ghost { border-color: var(--border-strong); color: var(--ink); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold-bright); transform: translateY(-2px); }

/* ---------- nav ---------- */
.site-nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background var(--t-med) var(--ease), border-color var(--t-med) var(--ease),
    backdrop-filter var(--t-med) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-nav.scrolled {
  background: rgba(10, 15, 12, 0.78);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  backdrop-filter: blur(14px) saturate(1.3);
  border-bottom-color: var(--border);
}
.nav-inner {
  width: min(100% - 2.5rem, var(--container)); margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 0.9rem; gap: 1rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.7rem;
  font-family: var(--font-display); font-size: 1.65rem; letter-spacing: 0.02em;
  text-decoration: none; color: var(--ink);
}
.brand svg { width: 3.2rem; height: 3.2rem; color: var(--gold); }
@media (max-width: 600px) {
  .brand { font-size: 1.3rem; gap: 0.5rem; }
  .brand svg { width: 2.5rem; height: 2.5rem; }
}
.brand em { font-style: italic; color: var(--gold-bright); }
.nav-links { display: flex; gap: clamp(0.8rem, 2.5vw, 2rem); flex-wrap: wrap; }
.nav-links a {
  font-size: var(--text-sm); font-weight: 400; color: var(--ink-dim);
  text-decoration: none; padding: 0.55rem 0.2rem; position: relative;
  transition: color var(--t-fast) var(--ease);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0.2rem; right: 0.2rem; bottom: 0.3rem;
  height: 1px; background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-med) var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); }

/* ---------- hero (editorial register) ---------- */
.hero {
  position: relative; min-height: 84dvh;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: 8.5rem; padding-bottom: var(--space-4);
}
.hero-grid { display: grid; gap: var(--space-4); align-items: center; }
@media (min-width: 880px) {
  .hero-grid { grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: var(--space-6); }
}
.hero-col { display: grid; gap: 0; }
.hero-eyebrow {
  display: flex; align-items: center; gap: 0.9rem;
  font-size: var(--text-xs); letter-spacing: 0.26em; text-transform: uppercase; color: var(--gold);
}
.hero-rule { width: 3rem; height: 1px; background: var(--gold); opacity: 0.6; flex: none; }
.hero-head {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(2.7rem, 1.5rem + 4.6vw, 5rem); line-height: 1.03; letter-spacing: -0.015em;
  color: var(--ink); text-wrap: balance; margin-top: var(--space-3);
}
.hero-head span { display: block; font-style: italic; }
.hero-head span::after {
  content: ""; display: block; width: 4.5rem; height: 2px; background: var(--gold); margin-top: 1.1rem;
}
.hero-deck {
  font-size: var(--text-lg); color: var(--ink-dim); line-height: 1.7; max-width: 33rem;
  margin-top: var(--space-3); text-wrap: pretty;
}
.hero-actions { display: flex; align-items: center; gap: 1.6rem; flex-wrap: wrap; margin-top: var(--space-4); }
.hero-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  color: var(--ink); font-size: var(--text-sm); letter-spacing: 0.02em; text-decoration: none;
  border-bottom: 1px solid var(--border-strong); padding-bottom: 3px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.hero-link:hover { color: var(--gold-bright); border-color: var(--gold); }
.hero-link .icon-sm { transition: transform var(--t-fast) var(--ease); }
.hero-link:hover .icon-sm { transform: translateX(3px); }

/* specimen plate — one animal, catalogued */
.hero-plate { margin: 0 0 0 auto; max-width: 25rem; width: 100%; }
@media (max-width: 880px) { .hero-plate { margin: 0 auto; max-width: 22rem; } }
.plate-frame {
  display: block; position: relative; aspect-ratio: 4 / 5; overflow: hidden;
  border: 1px solid var(--border-strong); padding: 0.55rem; background: rgba(255, 255, 255, 0.018);
  transition: border-color var(--t-med) var(--ease);
}
.plate-frame::before {
  content: ""; position: absolute; inset: 0.55rem; border: 1px solid rgba(236, 233, 226, 0.14);
  z-index: 2; pointer-events: none;
}
.plate-frame:hover { border-color: rgba(201, 163, 92, 0.5); }
.plate-frame .art { width: 100%; height: 100%; object-fit: cover; display: block; }
.plate-folio {
  position: absolute; top: 1.05rem; left: 1.05rem; z-index: 3;
  font-family: var(--font-display); font-style: italic; font-size: 1.1rem; color: var(--ink);
  background: rgba(7, 11, 9, 0.5); padding: 0.1rem 0.6rem; letter-spacing: 0.04em;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.plate-cap { display: grid; gap: 0.25rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.plate-name { font-family: var(--font-display); font-size: 1.3rem; color: var(--ink); line-height: 1.2; }
.plate-sci { font-style: italic; font-size: var(--text-sm); color: var(--ink-faint); }
.plate-meta { font-size: var(--text-sm); color: var(--ink-dim); margin-top: 0.35rem; }
.plate-pop { color: var(--gold-bright); }

/* contents/index bar */
.hero-index {
  list-style: none; margin: var(--space-6) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--border);
}
.hero-index li {
  padding: 1.3rem 1.4rem 0; border-left: 1px solid var(--border);
  display: flex; align-items: baseline; gap: 0.7rem;
}
.hero-index li:first-child { border-left: 0; padding-left: 0; }
.hero-index b {
  font-family: var(--font-display); font-weight: 500; font-size: clamp(1.5rem, 1.2rem + 1vw, 2.1rem);
  color: var(--gold-bright); font-variant-numeric: tabular-nums; line-height: 1;
}
.hero-index span { font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); line-height: 1.35; }
@media (max-width: 720px) {
  .hero-index { grid-template-columns: 1fr 1fr; }
  .hero-index li { padding: 1.1rem 0.5rem 0; }
  .hero-index li:nth-child(odd) { border-left: 0; padding-left: 0; }
}

/* ---------- story ---------- */
.story { padding-block: var(--space-6); }
.story .title { margin-top: var(--space-2); max-width: 50rem; }
.story-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-3); margin-top: var(--space-5);
}
.story-block {
  position: relative; padding: var(--space-4) var(--space-3) var(--space-3);
  background: linear-gradient(160deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}
.story-block:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.story-num {
  font-family: var(--font-display); font-style: italic; font-size: 2.6rem;
  color: var(--gold); opacity: 0.35; line-height: 1;
}
.story-block h3 {
  font-family: var(--font-display); font-weight: 500; font-size: 1.3rem;
  margin: 0.8rem 0 0.6rem;
}
.story-block p { color: var(--ink-dim); font-size: var(--text-sm); line-height: 1.7; }

/* ---------- directory ---------- */
.directory { padding-block: var(--space-6); }
.directory .title { margin-top: var(--space-2); }

.toolbar {
  display: flex; flex-wrap: wrap; gap: 0.7rem; align-items: center;
  margin-top: var(--space-4); padding: 0.9rem;
  background: rgba(16, 23, 18, 0.85); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: sticky; top: 4.2rem; z-index: 50;
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.field { position: relative; display: flex; align-items: center; }
.field--search { flex: 1 1 220px; }
.field--search .icon-sm { position: absolute; left: 0.9rem; color: var(--ink-faint); pointer-events: none; }
.toolbar input[type="search"], .toolbar select {
  width: 100%; min-height: 44px; padding: 0.55rem 0.9rem;
  background: var(--bg-deep); color: var(--ink);
  border: 1px solid var(--border); border-radius: 10px;
  transition: border-color var(--t-fast) var(--ease);
  appearance: none; -webkit-appearance: none;
}
.toolbar input[type="search"] { padding-left: 2.5rem; }
.toolbar select {
  cursor: pointer; padding-right: 2.1rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5 6 6.5l5-5' stroke='%23a9b4aa' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.8rem center;
}
.toolbar input:hover, .toolbar select:hover { border-color: var(--border-strong); }
.toolbar input:focus, .toolbar select:focus { border-color: var(--gold); outline: none; }
.toolbar-count { font-size: var(--text-xs); color: var(--ink-faint); letter-spacing: 0.08em; text-transform: uppercase; margin-left: auto; padding-right: 0.4rem; }

.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(245px, 1fr));
  gap: var(--space-3); margin-top: var(--space-4);
}
.grid--3 { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.grid-empty { margin-top: var(--space-4); color: var(--ink-dim); text-align: center; padding: var(--space-5) 0; }

/* ---------- species card ---------- */
.species-card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; text-decoration: none;
  cursor: pointer;
  transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease);
}
.species-card:hover {
  transform: translateY(-6px); border-color: rgba(201, 163, 92, 0.45);
  box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.8);
}
.card-media { position: relative; aspect-ratio: 4 / 5; overflow: hidden; }
.card-media .art {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--t-slow) var(--ease);
}
.species-card:hover .card-media .art { transform: scale(1.045); }
.card-rank {
  position: absolute; top: 0.8rem; left: 0.8rem;
  font-family: var(--font-display); font-style: italic; font-size: var(--text-sm);
  color: rgba(236, 233, 226, 0.92); letter-spacing: 0.06em;
  background: rgba(7, 11, 9, 0.55); padding: 0.25rem 0.65rem; border-radius: 999px;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.card-status { position: absolute; top: 0.8rem; right: 0.8rem; }
.card-body { padding: 1.1rem 1.2rem 1.25rem; display: grid; gap: 0.3rem; }
.card-name { font-family: var(--font-display); font-weight: 500; font-size: 1.22rem; line-height: 1.22; }
.card-sci { font-style: italic; font-size: var(--text-xs); color: var(--ink-faint); }
.card-meta {
  display: flex; justify-content: space-between; align-items: baseline; gap: 0.8rem;
  margin-top: 0.55rem; padding-top: 0.7rem; border-top: 1px solid var(--border);
}
.card-pop { font-size: var(--text-sm); font-weight: 500; color: var(--gold-bright); font-variant-numeric: tabular-nums; }
.card-loc {
  display: inline-flex; align-items: center; gap: 0.3rem;
  font-size: var(--text-xs); color: var(--ink-faint); text-align: right;
}
.card-loc .icon-sm { width: 0.85rem; height: 0.85rem; flex: none; }

/* ---------- chips & tags ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-size: var(--text-xs); font-weight: 500; letter-spacing: 0.06em;
  padding: 0.32rem 0.75rem; border-radius: 999px;
  border: 1px solid; background: rgba(7, 11, 9, 0.6);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.chip-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.chip--cr { color: #f0907e; border-color: rgba(224, 101, 79, 0.5); }
.chip--ew { color: #b9aee8; border-color: rgba(157, 143, 216, 0.5); }
.chip--en { color: #e7bd66; border-color: rgba(217, 164, 64, 0.5); }
.chip--class { color: var(--ink-dim); border-color: var(--border-strong); }
.tag {
  display: inline-block; font-size: var(--text-xs); color: var(--ink-dim);
  border: 1px solid var(--border-strong); border-radius: 999px;
  padding: 0.18rem 0.65rem; margin: 0 0.3rem 0.3rem 0;
}
.trend { display: inline-flex; align-items: center; gap: 0.4rem; font-size: var(--text-sm); font-weight: 500; }
.trend svg { width: 1rem; height: 1rem; }
.trend--down { color: var(--down); }
.trend--up { color: var(--up); }
.trend--flat { color: var(--ink-dim); }

/* ---------- alliance ---------- */
.alliance { padding-block: var(--space-6); border-top: 1px solid var(--border); }
.alliance .title { margin-top: var(--space-2); }
.org-wall {
  list-style: none; padding: 0; margin: var(--space-4) 0 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(225px, 1fr)); gap: 0.9rem;
}
.org-card {
  display: grid; grid-template-columns: auto 1fr auto; grid-template-rows: auto auto;
  align-items: center; column-gap: 0.9rem; row-gap: 0.1rem;
  padding: 0.9rem 1rem; height: 100%;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  text-decoration: none; cursor: pointer;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.org-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.org-mark { grid-row: 1 / 3; flex: none; }
img.org-mark { border-radius: 13px; object-fit: contain; box-shadow: 0 2px 8px -3px rgba(0, 0, 0, 0.5); }
.org-name { font-weight: 500; font-size: var(--text-sm); line-height: 1.3; }
.org-full { font-size: var(--text-xs); color: var(--ink-faint); line-height: 1.35; grid-column: 2; }
.org-ext { grid-row: 1 / 3; color: var(--ink-faint); justify-self: end; }
.org-card:hover .org-ext { color: var(--gold); }
.org-disclaimer { margin-top: var(--space-3); font-size: var(--text-xs); color: var(--ink-faint); max-width: 46rem; }

/* ---------- CTA band ---------- */
.cta-band {
  padding-block: var(--space-6); text-align: center;
  background:
    radial-gradient(60% 100% at 50% 100%, rgba(201, 163, 92, 0.1), transparent 70%),
    var(--bg-deep);
  border-top: 1px solid var(--border);
}
.cta-band .section-lede { margin-inline: auto; }
.cta-band .btn { margin-top: var(--space-3); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding-block: var(--space-5); background: var(--bg-deep); }
.footer-grid { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }
.footer-brand { font-family: var(--font-display); font-size: 1.3rem; }
.footer-brand em { font-style: italic; color: var(--gold-bright); }
.footer-note { font-size: var(--text-sm); color: var(--ink-faint); max-width: 34rem; margin-top: 0.6rem; }
.footer-note a { color: var(--ink-dim); }
.footer-links { display: grid; gap: 0.55rem; align-content: start; }
.footer-links a { color: var(--ink-dim); font-size: var(--text-sm); text-decoration: none; width: fit-content; }
.footer-links a:hover { color: var(--gold-bright); }
.footer-meta { font-size: var(--text-xs); color: var(--ink-faint); display: grid; gap: 0.5rem; align-content: end; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1.4fr; } }

/* ---------- breadcrumb ---------- */
.breadcrumb {
  display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap;
  padding-top: 7.6rem; font-size: var(--text-xs); letter-spacing: 0.05em;
  color: var(--ink-faint);
}
.breadcrumb a { color: var(--ink-dim); text-decoration: none; }
.breadcrumb a:hover { color: var(--gold-bright); }
.breadcrumb [aria-current] { color: var(--ink); }

/* ---------- particle field (three.js, species pages) ---------- */
.particle-field {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none; opacity: 0.6;
}
.page-species #main, .page-home #main { position: relative; z-index: 1; }
.page-species .site-footer, .page-home .site-footer { position: relative; z-index: 1; }
@media (prefers-reduced-motion: reduce) { .particle-field { display: none; } }


/* ---------- species page ---------- */
.sp-hero {
  display: grid; gap: var(--space-4); margin-top: var(--space-3);
  align-items: start;
}
@media (min-width: 900px) { .sp-hero { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); } }
.sp-media {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 5; position: sticky; top: 5.5rem;
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.7);
}
.sp-media .art { width: 100%; height: 100%; object-fit: cover; }
.sp-head { display: grid; gap: var(--space-2); }
.sp-rank {
  font-family: var(--font-display); font-style: italic; font-size: 1.5rem; color: var(--gold);
}
.sp-rank span { font-size: 1rem; color: var(--ink-faint); }
.sp-chips { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.sp-sci { font-style: italic; font-size: var(--text-lg); color: var(--ink-faint); margin-top: -0.6rem; }
.sp-pop {
  display: grid; gap: 0.3rem; padding: var(--space-3);
  background: linear-gradient(150deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
}
.sp-pop-label { font-size: var(--text-xs); letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-faint); }
.sp-pop-value {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.7rem, 1.3rem + 2vw, 2.7rem); line-height: 1.15;
  color: var(--gold-bright); font-variant-numeric: tabular-nums; text-wrap: balance;
}
.sp-facts { display: grid; gap: 1rem; margin: 0; }
.sp-facts > div {
  display: grid; gap: 0.35rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border);
}
.sp-facts dt {
  display: flex; align-items: center; gap: 0.45rem;
  font-size: var(--text-xs); letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint);
}
.sp-facts dt .icon-sm { color: var(--gold); }
.sp-facts dd { margin: 0; color: var(--ink-dim); font-size: var(--text-sm); line-height: 1.6; }

.sp-cols {
  display: grid; gap: var(--space-4); margin-top: var(--space-6);
}
@media (min-width: 900px) {
  .sp-cols { grid-template-columns: repeat(2, 1fr); }
  .sp-story { grid-column: 1 / -1; max-width: 46rem; }
}
.sp-story .sp-body { margin-top: var(--space-2); color: var(--ink-dim); font-size: var(--text-lg); line-height: 1.75; }
.sp-threats ul { margin: var(--space-2) 0 0; padding: 0; list-style: none; display: grid; gap: 0.6rem; }
.sp-threats li {
  padding: 0.8rem 1rem 0.8rem 2.4rem; position: relative;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  font-size: var(--text-sm); color: var(--ink-dim);
}
.sp-threats li::before {
  content: ""; position: absolute; left: 1rem; top: 1.25rem;
  width: 7px; height: 7px; border-radius: 50%; background: var(--cr);
}
.sp-threats .title-sm .icon { color: var(--cr); }
.sp-orgs .sp-org-list { list-style: none; margin: var(--space-2) 0 0; padding: 0; display: grid; gap: 0.7rem; }
.sp-orgs .title-sm .icon { color: var(--moss); }
.sp-faq { grid-column: 1 / -1; max-width: 46rem; }
.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); margin-top: 0.7rem; overflow: hidden;
}
.faq-item summary {
  padding: 1rem 1.2rem; cursor: pointer; font-weight: 500; font-size: var(--text-sm);
  list-style: none; position: relative; padding-right: 3rem;
  transition: color var(--t-fast) var(--ease); min-height: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 1.2rem; top: 50%;
  transform: translateY(-50%); font-family: var(--font-display); font-size: 1.3rem;
  color: var(--gold); transition: transform var(--t-fast) var(--ease);
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item summary:hover { color: var(--gold-bright); }
.faq-item p { padding: 0 1.2rem 1.1rem; color: var(--ink-dim); font-size: var(--text-sm); }

.sp-related { margin-top: var(--space-6); }
.sp-related .grid { margin-top: var(--space-3); }

.sp-pager {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: stretch;
  margin-block: var(--space-6); padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}
.sp-pager a {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 1rem 1.2rem; border: 1px solid var(--border); border-radius: var(--radius);
  text-decoration: none; color: var(--ink-dim);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}
.sp-pager a:hover { border-color: var(--gold); color: var(--ink); transform: translateY(-2px); }
.sp-pager a span { display: grid; gap: 0.1rem; font-family: var(--font-display); font-size: 1.05rem; line-height: 1.25; }
.sp-pager a small { font-family: var(--font-text); font-size: var(--text-xs); color: var(--gold); font-style: italic; }
.sp-pager .pager-next { justify-content: flex-end; text-align: right; }
.sp-pager .pager-all { justify-content: center; align-items: center; font-size: var(--text-sm); letter-spacing: 0.1em; text-transform: uppercase; }

/* ---------- prose / about / 404 ---------- */
.prose { padding-block: 0 var(--space-6); max-width: 46rem; }
.prose .kicker { margin-top: var(--space-4); }
.prose .display { margin-top: var(--space-2); }
.prose .lede { margin-top: var(--space-2); }
.prose h2 {
  font-family: var(--font-display); font-weight: 500; font-size: var(--title-sm);
  margin-top: var(--space-5);
}
.prose p, .prose ul { color: var(--ink-dim); margin-top: var(--space-2); }
.prose a { color: var(--gold-bright); text-underline-offset: 3px; }
.prose code {
  font-size: 0.85em; background: var(--surface-2); border: 1px solid var(--border);
  padding: 0.1em 0.4em; border-radius: 6px;
}
.prose li { margin-top: 0.4rem; }
.prose [id] { scroll-margin-top: 7rem; }
.page-404 { padding-top: var(--space-5); min-height: 60dvh; }

/* ---------- why-extinction page ---------- */
.stat-strip {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px; margin: var(--space-4) 0; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden;
}
.stat { background: var(--surface); padding: 1.4rem 1.3rem; display: grid; gap: 0.45rem; }
.stat strong {
  font-family: var(--font-display); font-weight: 500; line-height: 1;
  font-size: clamp(1.9rem, 1.4rem + 1.6vw, 2.6rem);
  color: var(--gold-bright); font-variant-numeric: tabular-nums;
}
.stat span { font-size: var(--text-sm); color: var(--ink-dim); line-height: 1.45; }
.prose sup { font-size: 0.68em; line-height: 0; }
.prose sup a { color: var(--gold); text-decoration: none; padding: 0 0.12em; font-weight: 600; }
.prose sup a:hover { color: var(--gold-bright); text-decoration: underline; }
.refs-note { font-size: var(--text-sm); color: var(--ink-faint); }
.refs { margin-top: var(--space-2); padding-left: 1.5rem; display: grid; gap: 0.85rem; }
.refs li { color: var(--ink-dim); font-size: var(--text-sm); line-height: 1.6; }
.refs li::marker { color: var(--gold); }
.refs a { color: var(--gold-bright); word-break: break-word; }

/* ---------- designer credit ---------- */
.footer-credit { color: var(--ink-dim); font-size: var(--text-sm); }
.footer-credit a { color: var(--gold-bright); text-decoration: none; font-weight: 600; }
.footer-credit a:hover { text-decoration: underline; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.in {
  opacity: 1; transform: none;
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}
.no-observer .reveal, .reduced-motion .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- small screens ---------- */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.nav-open {
    display: grid; position: fixed; inset: 3.6rem 0 auto 0;
    background: rgba(7, 11, 9, 0.96); padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border); gap: 0.2rem;
    -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  }
  .hero { min-height: 88dvh; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .toolbar { position: static; }
  .toolbar-count { margin-left: 0; width: 100%; }
  .sp-pager { grid-template-columns: 1fr; }
  .sp-pager .pager-next { justify-content: flex-start; text-align: left; }
  .sp-media { position: static; }
}

/* mobile nav toggle button (injected by JS) */
.nav-toggle {
  display: none; background: none; border: 1px solid var(--border-strong);
  border-radius: 10px; color: var(--ink); padding: 0.5rem 0.8rem; cursor: pointer;
  min-height: 44px; min-width: 44px;
}
@media (max-width: 640px) { .nav-toggle { display: inline-flex; align-items: center; justify-content: center; } }