@import url("/fonts/fonts.css");

/* ============================================================
   ASTRONOMIA - "Orrery Console" design system
   Deep-space instrument panel: indigo void, per-planet accent,
   observation ports, mono telemetry. OKLCH throughout.
   ============================================================ */

:root {
  /* --- color: tinted neutrals toward the void hue, never pure black/white --- */
  --bg:          oklch(0.13 0.028 270);
  --bg-deep:     oklch(0.10 0.025 272);
  --surface:     oklch(0.17 0.030 270);
  --surface-2:   oklch(0.21 0.032 268);
  --surface-3:   oklch(0.25 0.034 266);
  --fg:          oklch(0.95 0.008 90);
  --fg-muted:    oklch(0.74 0.018 268);
  --fg-dim:      oklch(0.58 0.020 268);
  --line:        oklch(0.34 0.022 268 / 0.55);
  --line-soft:   oklch(0.34 0.022 268 / 0.3);
  --error:       oklch(0.64 0.19 25);

  /* default accent; overridden per planet via inline --accent */
  --accent:      oklch(0.80 0.09 200);

  /* --- type --- */
  --font-display: "Unbounded", "Golos Text", system-ui, sans-serif;
  --font-body:    "Golos Text", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --fs-hero: clamp(3rem, 9vw, 7rem);
  --fs-900:  clamp(2.4rem, 6vw, 4.2rem);
  --fs-800:  clamp(1.9rem, 4vw, 2.85rem);
  --fs-700:  clamp(1.55rem, 3vw, 2rem);
  --fs-600:  1.5rem;
  --fs-500:  1.22rem;
  --fs-400:  1.06rem;
  --fs-300:  0.95rem;
  --fs-200:  0.8rem;
  --fs-100:  0.7rem;

  /* --- spacing (0.25rem base) --- */
  --sp-1: 0.25rem;  --sp-2: 0.5rem;  --sp-3: 0.75rem; --sp-4: 1rem;
  --sp-5: 1.5rem;   --sp-6: 2rem;    --sp-8: 3rem;    --sp-10: 4rem;
  --sp-12: 6rem;    --sp-16: 8rem;

  --radius:    14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow: 0 18px 50px -20px oklch(0.04 0.02 270 / 0.9);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);   /* ease-out-expo */
  --dur:  0.5s;

  --maxw: 1240px;
}

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

* { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

html, body { max-width: 100%; overflow-x: hidden; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-400);
  line-height: 1.6;
  color: var(--fg);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  min-height: 100vh;
}

/* the void: layered gradients + sparse starfield, 0 KB */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 80% at 50% -10%,
      color-mix(in oklch, var(--accent) 14%, transparent), transparent 55%),
    radial-gradient(100% 120% at 50% 50%, var(--bg), var(--bg-deep));
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    radial-gradient(1.4px 1.4px at 12% 22%, oklch(0.96 0.02 250 / 0.9), transparent 60%),
    radial-gradient(1.2px 1.2px at 78% 14%, oklch(0.92 0.02 250 / 0.7), transparent 60%),
    radial-gradient(1px 1px at 33% 67%, oklch(0.9 0.02 250 / 0.6), transparent 60%),
    radial-gradient(1.3px 1.3px at 64% 48%, oklch(0.95 0.02 250 / 0.7), transparent 60%),
    radial-gradient(1px 1px at 90% 80%, oklch(0.88 0.02 250 / 0.5), transparent 60%),
    radial-gradient(1.1px 1.1px at 47% 90%, oklch(0.9 0.02 250 / 0.6), transparent 60%);
  background-size: 320px 320px;
}

img, model-viewer { display: block; }

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

::selection { background: color-mix(in oklch, var(--accent) 40%, transparent); color: var(--fg); }

/* ---------- utilities ---------- */
.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.02em;
  font-feature-settings: "tnum" 1;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-200);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: color-mix(in oklch, var(--accent) 72%, var(--fg));
}

.skip-link {
  position: fixed;
  top: var(--sp-3);
  left: var(--sp-3);
  z-index: 200;
  transform: translateY(-160%);
  background: var(--surface-2);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--fs-300);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: 2.5px solid color-mix(in oklch, var(--accent) 80%, white);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  min-height: 48px;
  padding: 0 var(--sp-5);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-300);
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.btn--primary {
  background: color-mix(in oklch, var(--accent) 90%, white 6%);
  color: oklch(0.16 0.03 270);
  font-weight: 600;
}
.btn--primary:hover { transform: translateY(-2px); }
.btn--ghost {
  border-color: var(--line);
  color: var(--fg);
  background: color-mix(in oklch, var(--surface) 40%, transparent);
}
.btn--ghost:hover {
  border-color: color-mix(in oklch, var(--accent) 60%, var(--line));
  color: color-mix(in oklch, var(--accent) 65%, var(--fg));
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklch, var(--bg-deep) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.site-header__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: var(--sp-3) clamp(1rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
  color: var(--fg);
}
.wordmark__mark { color: var(--accent); display: inline-flex; }
.wordmark__mark svg { animation: orbit 16s linear infinite; transform-origin: 50% 50%; }
.wordmark__text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

@keyframes orbit { to { transform: rotate(360deg); } }

.switcher {
  margin-left: auto;
  min-width: 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
}
.switcher__list {
  display: flex;
  gap: var(--sp-2);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  padding: var(--sp-1) var(--sp-3);
  scroll-snap-type: x proximity;
}
.switcher__list::-webkit-scrollbar { display: none; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-soft);
  background: color-mix(in oklch, var(--surface) 35%, transparent);
  white-space: nowrap;
  scroll-snap-align: center;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.chip__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px color-mix(in oklch, var(--accent) 70%, transparent);
}
.chip__idx { font-family: var(--font-mono); font-size: var(--fs-100); color: var(--fg-dim); }
.chip__name { font-size: var(--fs-300); color: var(--fg-muted); }
.chip:hover { border-color: color-mix(in oklch, var(--accent) 50%, var(--line)); background: color-mix(in oklch, var(--surface-2) 60%, transparent); }
.chip:hover .chip__name { color: var(--fg); }
.chip--active {
  border-color: color-mix(in oklch, var(--accent) 70%, transparent);
  background: color-mix(in oklch, var(--accent) 14%, var(--surface));
}
.chip--active .chip__name { color: var(--fg); }
.chip--active .chip__idx { color: color-mix(in oklch, var(--accent) 70%, var(--fg)); }

/* ---------- layout shell ---------- */
main { display: block; }

.hero,
.index-section,
.planet-hero,
.planet-body,
.pager--wide {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

/* ---------- hero ---------- */
.hero {
  min-height: min(86svh, 760px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(3rem, 10vh, 7rem);
  position: relative;
}
.hero__grid { max-width: 56rem; }
.hero__title {
  font-size: var(--fs-hero);
  font-weight: 800;
  margin-block: var(--sp-3) var(--sp-4);
  letter-spacing: -0.02em;
  background: none;
}
.hero__lede {
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  color: var(--fg-muted);
  max-width: 46ch;
  line-height: 1.55;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}
.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-8);
  margin-top: var(--sp-10);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line-soft);
}
.hero__stats dt {
  font-size: var(--fs-200);
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.hero__stats dd {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  color: var(--fg);
  margin-top: var(--sp-1);
}
.hero__scroll {
  position: absolute;
  right: clamp(1rem, 4vw, 2.5rem);
  bottom: var(--sp-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  color: var(--fg-dim);
  font-size: var(--fs-100);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 1px; height: 46px;
  background: linear-gradient(var(--accent), transparent);
}
@media (max-width: 760px) { .hero__scroll { display: none; } }

/* ---------- section head ---------- */
.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  max-width: 50rem;
  margin-bottom: var(--sp-8);
}
.section-head h2 { font-size: var(--fs-900); }
.section-head__sub { color: var(--fg-muted); max-width: 52ch; }

.index-section { padding-block: var(--sp-12) var(--sp-16); }

/* ============================================================
   SIGNATURE ELEMENT - the Observation Port
   ============================================================ */
.obs-port {
  position: relative;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(125% 120% at 50% 38%,
      color-mix(in oklch, var(--accent) 16%, oklch(0.2 0.05 270)) 0%,
      oklch(0.11 0.03 272) 72%);
  border: 1px solid color-mix(in oklch, var(--accent) 34%, transparent);
  box-shadow:
    inset 0 0 60px oklch(0.05 0.02 272 / 0.85),
    0 0 0 1px var(--line-soft),
    var(--shadow);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  isolation: isolate;
}
/* viewfinder corner brackets */
.obs-port::before,
.obs-port::after {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  border: 1.5px solid color-mix(in oklch, var(--accent) 70%, transparent);
  opacity: 0.6;
  pointer-events: none;
  z-index: 3;
}
.obs-port::before { top: 12px; left: 12px; border-right: 0; border-bottom: 0; border-top-left-radius: 4px; }
.obs-port::after  { bottom: 30px; right: 12px; border-left: 0; border-top: 0; border-bottom-right-radius: 4px; }

.obs-port__model { width: 100%; height: 100%; --poster-color: transparent; }

.obs-port__skeleton {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(40% 40% at 50% 45%,
      color-mix(in oklch, var(--accent) 22%, transparent), transparent 70%);
  opacity: 1;
  transition: opacity 0.8s var(--ease);
}
.obs-port__skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 35%,
    color-mix(in oklch, var(--accent) 18%, transparent) 50%, transparent 65%);
  background-size: 250% 100%;
  animation: shimmer 1.8s var(--ease) infinite;
}
.obs-port.is-loaded .obs-port__skeleton { opacity: 0; }
.obs-port.is-error .obs-port__skeleton { opacity: 1; animation: none; }
.obs-port.is-error .obs-port__skeleton::after { animation: none; opacity: 0; }
@keyframes shimmer { from { background-position: 120% 0; } to { background-position: -120% 0; } }

.obs-port.is-error::before, .obs-port.is-error::after { opacity: 0; }
.obs-port.is-error .obs-port__model { opacity: 0; }
.obs-port__fallback {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  text-align: center;
  padding: var(--sp-4);
  color: var(--fg-muted);
  z-index: 2;
}
.obs-port.is-error .obs-port__fallback { display: flex; }
.obs-port__fallback span:first-child { font-size: 1.8rem; }
.obs-port__fallback span:last-child { font-size: var(--fs-200); font-family: var(--font-mono); }

.obs-port__caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-100);
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  background: linear-gradient(transparent, oklch(0.08 0.02 272 / 0.7));
  border-top: 1px solid var(--line-soft);
}

.badge {
  position: absolute;
  top: var(--sp-3);
  right: var(--sp-3);
  z-index: 4;
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.04em;
  background: oklch(0.30 0.07 322);
  color: oklch(0.93 0.03 322);
  border: 1px solid oklch(0.70 0.06 322 / 0.5);
}

/* ---------- planet grid ---------- */
.planet-grid {
  list-style: none;
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.4rem);
  grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
}
.planet-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  height: 100%;
  transition: transform var(--dur) var(--ease);
}
.planet-card .obs-port {
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.planet-card:hover { transform: translateY(-6px); }
.planet-card:hover .obs-port,
.planet-card:focus-visible .obs-port {
  border-color: color-mix(in oklch, var(--accent) 75%, transparent);
  box-shadow:
    inset 0 0 60px oklch(0.05 0.02 272 / 0.7),
    0 18px 50px -18px color-mix(in oklch, var(--accent) 45%, transparent);
}
.planet-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  position: relative;
  padding-left: var(--sp-5);
}
.planet-card__idx {
  position: absolute;
  left: 0; top: 4px;
  font-size: var(--fs-100);
  color: color-mix(in oklch, var(--accent) 60%, var(--fg-dim));
}
.planet-card__name { font-size: var(--fs-600); }
.planet-card__tagline { color: var(--fg-muted); font-size: var(--fs-300); line-height: 1.45; }
.planet-card__group {
  margin-top: var(--sp-1);
  font-size: var(--fs-100);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
}

/* ---------- planet hero ---------- */
.planet-hero { padding-block: var(--sp-8) var(--sp-6); }
.planet-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3.5rem);
  align-items: center;
}
.planet-hero__port { width: 100%; }
.obs-port--large { aspect-ratio: 4 / 5; }
.obs-port--large .obs-port__model { cursor: grab; }
.obs-port--large .obs-port__model:active { cursor: grabbing; }

.breadcrumb {
  display: flex;
  gap: var(--sp-2);
  font-size: var(--fs-200);
  color: var(--fg-dim);
  margin-bottom: var(--sp-4);
}
.breadcrumb a:hover { color: color-mix(in oklch, var(--accent) 65%, var(--fg)); }

.planet-hero__title {
  font-size: var(--fs-hero);
  font-weight: 800;
  margin-block: var(--sp-2) var(--sp-3);
}
.planet-hero__tagline {
  font-size: clamp(1.1rem, 2.4vw, 1.45rem);
  color: var(--fg-muted);
  max-width: 34ch;
}

/* ---------- pager ---------- */
.pager {
  display: flex;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}
.pager__btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in oklch, var(--surface) 40%, transparent);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.pager__btn--next { text-align: right; align-items: flex-end; }
.pager__btn:hover {
  border-color: color-mix(in oklch, var(--accent) 60%, var(--line));
  background: color-mix(in oklch, var(--accent) 10%, var(--surface));
  transform: translateY(-2px);
}
.pager__dir { font-size: var(--fs-100); color: var(--fg-dim); letter-spacing: 0.1em; }
.pager__name { font-size: var(--fs-500); font-weight: 600; font-family: var(--font-display); }

.pager--wide { margin-block: var(--sp-8) var(--sp-12); }
.pager--wide .pager__btn { padding: var(--sp-5); }
.pager--wide .pager__name { font-size: var(--fs-700); }

/* ---------- planet body: readout + prose ---------- */
.planet-body {
  display: grid;
  grid-template-columns: minmax(0, 22rem) minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3.5rem);
  padding-block: var(--sp-8);
  align-items: start;
}
.readout {
  position: sticky;
  top: 92px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: color-mix(in oklch, var(--surface) 55%, transparent);
  padding: var(--sp-5);
}
.readout__heading {
  font-size: var(--fs-100);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: color-mix(in oklch, var(--accent) 65%, var(--fg-muted));
  padding-bottom: var(--sp-3);
  margin-bottom: var(--sp-3);
  border-bottom: 1px solid var(--line-soft);
}
.readout__grid { display: flex; flex-direction: column; }
.readout__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: var(--sp-3);
  border-bottom: 1px dashed var(--line-soft);
}
.readout__row:last-child { border-bottom: 0; padding-bottom: 0; }
.readout__row dt { color: var(--fg-dim); font-size: var(--fs-200); }
.readout__row dd {
  font-size: var(--fs-300);
  color: var(--fg);
  text-align: right;
  font-weight: 500;
}

.prose { max-width: 68ch; }
.prose p { margin-bottom: var(--sp-4); color: var(--fg-muted); line-height: 1.75; }
.prose__lead {
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  color: var(--fg);
  line-height: 1.6;
}
.prose__lead::first-letter {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3.1em;
  float: left;
  line-height: 0.8;
  padding: 6px 10px 0 0;
  color: var(--accent);
}

.facts {
  margin-top: var(--sp-6);
  border-top: 1px solid var(--line-soft);
  padding-top: var(--sp-5);
}
.facts__heading {
  font-size: var(--fs-100);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  margin-bottom: var(--sp-4);
}
.facts__list { list-style: none; display: flex; flex-direction: column; gap: var(--sp-3); }
.facts__list li {
  position: relative;
  padding-left: var(--sp-6);
  color: var(--fg-muted);
}
.facts__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px color-mix(in oklch, var(--accent) 70%, transparent);
}

/* ---------- footer ---------- */
.site-footer {
  margin-top: var(--sp-12);
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
}
.site-footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: var(--sp-8) clamp(1rem, 4vw, 2.5rem) var(--sp-6);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--sp-8);
}
.site-footer__brand .wordmark__text { font-size: 1.4rem; display: inline-block; margin-bottom: var(--sp-3); }
.site-footer__brand p { color: var(--fg-muted); max-width: 38ch; }
.site-footer__heading {
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
  margin-bottom: var(--sp-4);
  font-weight: 500;
}
.site-footer__sources ul { list-style: none; display: flex; flex-direction: column; gap: var(--sp-4); }
.site-footer__sources li { display: flex; flex-direction: column; gap: 2px; }
.site-footer__sources span { font-size: var(--fs-200); color: var(--fg-dim); }
.site-footer__sources a { color: color-mix(in oklch, var(--accent) 60%, var(--fg)); width: fit-content; }
.site-footer__sources a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.site-footer__base {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: var(--sp-4) clamp(1rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-2);
  font-size: var(--fs-200);
  color: var(--fg-dim);
}

/* ---------- error page ---------- */
.error-page {
  max-width: 46rem;
  margin-inline: auto;
  min-height: 72svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--sp-4);
  padding: var(--sp-12) clamp(1rem, 4vw, 2.5rem);
  text-align: center;
  align-items: center;
}
.error-page__code {
  font-size: clamp(4rem, 18vw, 9rem);
  font-weight: 700;
  color: color-mix(in oklch, var(--accent) 55%, var(--fg-dim));
  line-height: 1;
}
.error-page__title { font-size: var(--fs-900); }
.error-page__lede { color: var(--fg-muted); max-width: 44ch; }
.error-page .btn { margin-top: var(--sp-3); }

/* ---------- scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .planet-hero__inner { grid-template-columns: 1fr; }
  .obs-port--large { aspect-ratio: 1 / 1; max-width: 30rem; margin-inline: auto; width: 100%; }
  .planet-body { grid-template-columns: 1fr; }
  .readout { position: static; }
}

@media (max-width: 640px) {
  .site-header__inner { gap: var(--sp-3); padding-inline: 1rem; }
  .wordmark__text { font-size: 1rem; }
  .hero__stats { gap: var(--sp-6); }
  .site-footer__inner { grid-template-columns: 1fr; gap: var(--sp-6); }
  .pager { flex-direction: column; }
  .pager__btn--next { text-align: left; align-items: flex-start; }
  .prose__lead::first-letter { font-size: 2.6em; }
}

/* ---------- motion / a11y ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .obs-port__skeleton::after { animation: none; }
  .wordmark__mark svg { animation: none; }
}