/* =============================================================
   MERIDIAN & CO. - Cartographers & Engravers (fictional)
   Design identity: "Expedition Ledger"
   Engraved-chart editorial system. Parchment, ink navy, oxblood
   seal wax, brass instruments. Serif display (Newsreader variable,
   optical sizing) against a surveyor's mono (IBM Plex Mono).
   Motion signature: scroll-drawn coastline paths, a slow compass
   rose, ruled survey-line entrances.
   No frameworks. Tokens first. WCAG 2.2 AA.
   ============================================================= */

/* ---------- Fonts (self-hosted, exact ranges) ---------- */
@font-face {
  font-family: "Newsreader";
  src: url("../fonts/newsreader-normal.woff2") format("woff2-variations");
  font-weight: 200 800;
  font-stretch: 100%;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("../fonts/newsreader-italic.woff2") format("woff2-variations");
  font-weight: 200 800;
  font-stretch: 100%;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("../fonts/plexmono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("../fonts/plexmono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("../fonts/plexmono-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ---------- Registered custom properties ---------- */
@property --heading-weight {
  syntax: "<number>";
  inherits: true;
  initial-value: 560;
}
@property --rule-progress {
  syntax: "<number>";
  inherits: false;
  initial-value: 0;
}

/* ---------- Design tokens ---------- */
:root {
  color-scheme: light;

  /* Surfaces: aged chart paper */
  --paper: oklch(0.945 0.022 84);
  --paper-deep: oklch(0.905 0.032 80);
  --paper-raised: oklch(0.965 0.014 86);
  --vellum: oklch(0.97 0.008 86);

  /* Inks */
  --ink: oklch(0.26 0.045 262);
  --ink-soft: oklch(0.40 0.038 260);
  --ink-faint: oklch(0.55 0.028 258);

  /* Accents: wax seal, brass fitting, open sea */
  --oxblood: oklch(0.45 0.125 28);
  --oxblood-deep: oklch(0.36 0.11 26);
  --brass: oklch(0.60 0.095 76);
  --brass-deep: oklch(0.48 0.088 72);
  --sea: oklch(0.42 0.075 226);
  --sea-deep: oklch(0.32 0.06 230);

  /* On-accent */
  --on-seal: oklch(0.96 0.02 60);

  /* Lines: engraved rules */
  --rule: oklch(0.26 0.045 262 / 0.22);
  --rule-soft: oklch(0.26 0.045 262 / 0.10);
  --rule-strong: oklch(0.26 0.045 262 / 0.45);

  /* Typography */
  --font-display: "Newsreader", "Iowan Old Style", Georgia, serif;
  --font-mono: "Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --text-xs: 0.72rem;
  --text-sm: 0.84rem;
  --text-base: 1.02rem;
  --text-md: 1.13rem;
  --text-lg: 1.3rem;
  --text-xl: clamp(1.55rem, 1.2rem + 1.7vw, 2.1rem);
  --text-2xl: clamp(2rem, 1.5rem + 2.6vw, 3rem);
  --text-3xl: clamp(2.6rem, 1.8rem + 4.4vw, 4.4rem);
  --text-hero: clamp(3rem, 2rem + 6vw, 6.5rem);

  --leading-tight: 1.08;
  --leading-snug: 1.28;
  --leading-body: 1.62;

  --track-wide: 0.16em;
  --track-wider: 0.28em;

  /* Spacing (4px base, engraved rhythm) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 9rem;

  /* Geometry */
  --radius-plate: 3px;
  --radius-pill: 999px;
  --rule-width: 1px;
  --rule-double: 3px;

  /* Elevation: paper on a drafting table, no glossy shadows */
  --shadow-plate: 0 1px 0 oklch(0.26 0.045 262 / 0.08), 0 10px 28px -18px oklch(0.26 0.045 262 / 0.35);
  --shadow-lift: 0 2px 0 oklch(0.26 0.045 262 / 0.10), 0 18px 44px -20px oklch(0.26 0.045 262 / 0.42);

  /* Motion */
  --ease-survey: cubic-bezier(0.22, 0.61, 0.21, 1);
  --ease-seal: cubic-bezier(0.34, 1.3, 0.42, 1);
  --dur-fast: 140ms;
  --dur-med: 280ms;
  --dur-slow: 640ms;
  --dur-drift: 14000ms;

  --container: 1180px;
  --gutter: clamp(1.1rem, 4vw, 2.4rem);
}

[data-theme="night"] {
  color-scheme: dark;

  /* Night passage: chart desk under a lamp */
  --paper: oklch(0.225 0.035 258);
  --paper-deep: oklch(0.19 0.032 258);
  --paper-raised: oklch(0.26 0.038 258);
  --vellum: oklch(0.30 0.04 256);

  --ink: oklch(0.90 0.035 84);
  --ink-soft: oklch(0.74 0.038 84);
  --ink-faint: oklch(0.58 0.03 84);

  --oxblood: oklch(0.64 0.13 30);
  --oxblood-deep: oklch(0.55 0.12 28);
  --brass: oklch(0.75 0.105 80);
  --brass-deep: oklch(0.62 0.095 74);
  --sea: oklch(0.70 0.08 224);
  --sea-deep: oklch(0.58 0.07 226);

  --on-seal: oklch(0.20 0.05 30);

  --rule: oklch(0.90 0.035 84 / 0.20);
  --rule-soft: oklch(0.90 0.035 84 / 0.09);
  --rule-strong: oklch(0.90 0.035 84 / 0.42);

  --shadow-plate: 0 1px 0 oklch(0 0 0 / 0.3), 0 12px 32px -20px oklch(0 0 0 / 0.6);
  --shadow-lift: 0 2px 0 oklch(0 0 0 / 0.34), 0 20px 48px -22px oklch(0 0 0 / 0.7);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: 420;
  min-height: 100dvh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img, svg, video, canvas { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; padding: 0; }
table { border-collapse: collapse; width: 100%; }
hr { border: none; border-top: var(--rule-width) solid var(--rule); }
::selection { background: oklch(0.45 0.125 28 / 0.25); }

/* ---------- Accessibility ---------- */
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-plate);
  transition: top var(--dur-fast) var(--ease-survey);
}
.skip-link:focus { top: var(--space-3); }

:focus-visible {
  outline: 2px solid var(--oxblood);
  outline-offset: 3px;
  border-radius: 2px;
}
[data-theme="night"] :focus-visible { outline-color: var(--brass); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- Type ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-variation-settings: "opsz" 48;
  font-weight: var(--heading-weight);
  line-height: var(--leading-tight);
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
p { text-wrap: pretty; max-width: 62ch; }
.lead {
  font-size: var(--text-md);
  line-height: var(--leading-snug);
  color: var(--ink-soft);
  font-weight: 380;
}
em { font-style: italic; font-variation-settings: "opsz" 20; }
small, .small { font-size: var(--text-sm); }

.mono {
  font-family: var(--font-mono);
  font-weight: 400;
  letter-spacing: 0.04em;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--track-wider);
  color: var(--oxblood);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.eyebrow::before {
  content: "";
  width: 1.6em;
  height: 1px;
  background: currentColor;
}
.plate-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-faint);
  letter-spacing: var(--track-wide);
}
.drop-cap::first-letter {
  font-size: 3.4em;
  float: left;
  line-height: 0.82;
  padding-right: 0.08em;
  padding-top: 0.04em;
  font-weight: 500;
  color: var(--oxblood);
  font-variation-settings: "opsz" 72;
}

/* ---------- Layout ---------- */
.container {
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin-inline: auto;
}
.section { padding-block: var(--space-8); }
.section-tight { padding-block: var(--space-6); }
.rule-top { border-top: var(--rule-double) solid var(--rule-strong); position: relative; }
.rule-top::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 2px;
  border-top: var(--rule-width) solid var(--rule);
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.two-col {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 3fr);
  gap: var(--space-7);
  align-items: start;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

/* ---------- Masthead ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px) saturate(1.1);
  border-bottom: var(--rule-width) solid var(--rule);
}
.masthead::after {
  content: "";
  display: block;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--rule) 0 14px,
    transparent 14px 20px
  );
  opacity: 0.7;
}
.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: var(--space-3);
}
.wordmark {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--ink);
}
.wordmark-name {
  font-size: 1.35rem;
  font-weight: 620;
  font-variation-settings: "opsz" 40;
  letter-spacing: -0.01em;
}
.wordmark-name .amp {
  font-style: italic;
  font-weight: 400;
  color: var(--oxblood);
}
.wordmark-est {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-faint);
  letter-spacing: var(--track-wide);
}
.primary-nav ul {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
}
.primary-nav a {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  color: var(--ink-soft);
  padding: var(--space-1) 2px;
  position: relative;
  transition: color var(--dur-fast) var(--ease-survey);
}
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 1.5px;
  background: var(--oxblood);
  transition: right var(--dur-med) var(--ease-survey);
}
.primary-nav a:hover, .primary-nav a:focus-visible { color: var(--ink); }
.primary-nav a:hover::after, .primary-nav a:focus-visible::after,
.primary-nav a[aria-current="page"]::after { right: 0; }
.primary-nav a[aria-current="page"] { color: var(--ink); }

.masthead-actions { display: flex; align-items: center; gap: var(--space-3); }
.theme-toggle {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: var(--rule-width) solid var(--rule);
  border-radius: var(--radius-plate);
  transition: border-color var(--dur-fast), color var(--dur-fast);
}
.theme-toggle:hover { border-color: var(--rule-strong); color: var(--ink); }
.theme-toggle .sun, .theme-toggle .moon { font-size: 0.9em; }
[data-theme="night"] .theme-toggle .sun { display: none; }
:root:not([data-theme="night"]) .theme-toggle .moon { display: none; }

/* Nav drawer (mobile) */
.nav-toggle {
  display: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--track-wide);
  padding: var(--space-2) var(--space-3);
  border: var(--rule-width) solid var(--rule);
  border-radius: var(--radius-plate);
  color: var(--ink-soft);
}
.nav-toggle[aria-expanded="true"] { color: var(--ink); border-color: var(--rule-strong); }

/* ---------- Buttons ---------- */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.72rem 1.35rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: var(--rule-width) solid var(--btn-bg);
  border-radius: var(--radius-plate);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-fast) var(--ease-survey),
              background var(--dur-fast), border-color var(--dur-fast),
              color var(--dur-fast), box-shadow var(--dur-med);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-plate); }
.btn:active { transform: translateY(0); }
.btn-seal { --btn-bg: var(--oxblood); --btn-fg: var(--on-seal); border-color: var(--oxblood-deep); }
.btn-seal:hover { background: var(--oxblood-deep); }
.btn-ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  border-color: var(--rule-strong);
}
.btn-ghost:hover { background: oklch(0.26 0.045 262 / 0.06); box-shadow: none; }
[data-theme="night"] .btn-ghost:hover { background: oklch(0.9 0.03 84 / 0.07); }
.btn[disabled], .btn[aria-busy="true"] { opacity: 0.6; pointer-events: none; }
.btn .spinner {
  width: 0.9em; height: 0.9em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  display: none;
  animation: spin 700ms linear infinite;
}
.btn[aria-busy="true"] .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(1turn); } }

/* Text link with chart-course underline */
.link-course {
  color: var(--ink);
  text-decoration: none;
  background-image: linear-gradient(var(--oxblood), var(--oxblood));
  background-size: 100% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  padding-bottom: 2px;
  transition: background-size var(--dur-med) var(--ease-survey), color var(--dur-fast);
}
.link-course:hover, .link-course:focus-visible {
  color: var(--oxblood);
  background-size: 100% 2px;
}
[data-theme="night"] .link-course:hover { color: var(--brass); }

/* ---------- Map plates (cards) ---------- */
.plate {
  background: var(--paper-raised);
  border: var(--rule-width) solid var(--rule);
  border-radius: var(--radius-plate);
  box-shadow: var(--shadow-plate);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: transform var(--dur-med) var(--ease-survey),
              box-shadow var(--dur-med), border-color var(--dur-med);
}
.plate::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: var(--rule-width) solid var(--rule-soft);
  border-radius: 2px;
  pointer-events: none;
}
.plate:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); border-color: var(--rule-strong); }
.plate-figure {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-bottom: var(--rule-width) solid var(--rule);
  background: var(--paper-deep);
  position: relative;
}
.plate-figure svg { width: 100%; height: 100%; }
.plate-body { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.plate-title {
  font-size: var(--text-lg);
  font-weight: 560;
  font-variation-settings: "opsz" 32;
}
.plate-meta {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-faint);
  letter-spacing: var(--track-wide);
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: var(--rule-width) solid var(--rule-soft);
}
.plate-stamp {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--oxblood);
  border: 1.5px solid var(--oxblood);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
  transform: rotate(6deg);
  background: color-mix(in oklab, var(--paper) 82%, transparent);
  z-index: 2;
}
.plate-stamp.sold { color: var(--ink-faint); border-color: var(--ink-faint); }

/* Engraved map SVG treatments */
.map-svg .land { fill: oklch(0.26 0.045 262 / 0.08); stroke: var(--ink); stroke-width: 1.1; }
.map-svg .coast { fill: none; stroke: var(--sea); stroke-width: 1.6; }
[data-theme="night"] .map-svg .coast { stroke: var(--brass); }
.map-svg .route { fill: none; stroke: var(--oxblood); stroke-width: 1.8; stroke-dasharray: 5 4; }
.map-svg .rhumb { stroke: var(--rule); stroke-width: 0.7; }
.map-svg .label { font-family: var(--font-mono); font-size: 9px; fill: var(--ink-soft); letter-spacing: 0.08em; }

/* ---------- Ledger tables ---------- */
.ledger {
  font-size: var(--text-sm);
}
.ledger caption {
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--track-wider);
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-bottom: var(--space-3);
}
.ledger th, .ledger td {
  text-align: left;
  padding: var(--space-3) var(--space-3);
  border-bottom: var(--rule-width) solid var(--rule-soft);
}
.ledger thead th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--track-wide);
  color: var(--ink-soft);
  border-bottom: var(--rule-double) solid var(--rule-strong);
}
.ledger tbody tr { transition: background var(--dur-fast); }
.ledger tbody tr:hover { background: oklch(0.26 0.045 262 / 0.035); }
.ledger td.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- Forms ---------- */
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--ink-soft);
}
.field .hint { font-size: var(--text-xs); color: var(--ink-faint); font-family: var(--font-mono); }
.input, .textarea, .select {
  background: var(--vellum);
  border: var(--rule-width) solid var(--rule-strong);
  border-radius: var(--radius-plate);
  padding: 0.7rem 0.9rem;
  font-size: var(--text-base);
  font-family: var(--font-display);
  color: var(--ink);
  width: 100%;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast), background var(--dur-fast);
}
.input:hover, .textarea:hover, .select:hover { border-color: var(--ink-faint); }
.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: var(--oxblood);
  box-shadow: 0 0 0 3px oklch(0.45 0.125 28 / 0.18);
}
.input[aria-invalid="true"], .textarea[aria-invalid="true"] {
  border-color: var(--oxblood);
  background: oklch(0.45 0.125 28 / 0.05);
  animation: field-shake 260ms var(--ease-survey);
}
@keyframes field-shake {
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}
.field-error {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--oxblood);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 1em;
}
.form-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-faint);
  border-left: 2px solid var(--brass);
  padding-left: var(--space-3);
  line-height: 1.5;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-grid .span-2 { grid-column: span 2; }

/* ---------- Toast ---------- */
.toast-region {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.toast {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-plate);
  box-shadow: var(--shadow-lift);
  border-left: 3px solid var(--brass);
  animation: toast-in var(--dur-med) var(--ease-seal);
  max-width: 34ch;
}
.toast.error { border-left-color: var(--oxblood); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
}

/* ---------- Skeleton loading ---------- */
.skeleton {
  background: linear-gradient(90deg, var(--rule-soft) 25%, var(--rule) 45%, var(--rule-soft) 65%);
  background-size: 200% 100%;
  animation: skeleton 1.4s ease-in-out infinite;
  border-radius: var(--radius-plate);
  color: transparent !important;
}
@keyframes skeleton { to { background-position: -200% 0; } }

/* ---------- Empty state ---------- */
.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-5);
  border: 1px dashed var(--rule-strong);
  border-radius: var(--radius-plate);
  color: var(--ink-soft);
}
.empty-state .empty-mark { font-size: 1.8rem; display: block; margin-bottom: var(--space-3); color: var(--brass-deep); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: clip;
  padding-block: var(--space-9) var(--space-8);
  border-bottom: var(--rule-width) solid var(--rule);
  background:
    radial-gradient(ellipse 70% 55% at 75% 10%, oklch(0.60 0.095 76 / 0.10), transparent 70%),
    radial-gradient(ellipse 60% 50% at 12% 90%, oklch(0.42 0.075 226 / 0.10), transparent 70%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: var(--space-7);
  align-items: center;
}
.hero-title {
  font-size: var(--text-hero);
  font-weight: 520;
  line-height: 0.98;
  letter-spacing: -0.025em;
}
.hero-title .swash {
  font-style: italic;
  font-weight: 340;
  color: var(--sea);
}
[data-theme="night"] .hero-title .swash { color: var(--brass); }
.hero-coords {
  position: absolute;
  bottom: var(--space-5);
  right: var(--gutter);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  display: flex;
  gap: var(--space-4);
  pointer-events: none;
}
.hero-coords .live { color: var(--oxblood); font-variant-numeric: tabular-nums; min-width: 14ch; }

/* Coastline drawing SVG */
.coast-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.coast-svg path {
  fill: none;
  stroke: var(--sea);
  stroke-width: 1.4;
  opacity: 0.55;
  stroke-dasharray: var(--path-length, 2000);
  stroke-dashoffset: var(--path-length, 2000);
}
.coast-svg path.drawn {
  animation: coast-draw var(--dur-slow, 3s) var(--ease-survey) forwards;
  animation-delay: calc(var(--i, 0) * 350ms);
}
@keyframes coast-draw { to { stroke-dashoffset: 0; } }

/* Compass rose */
.compass { width: clamp(140px, 18vw, 220px); }
.compass .rose {
  transform-origin: 50% 50%;
  animation: compass-turn var(--dur-drift) linear infinite;
}
@keyframes compass-turn { to { transform: rotate(360deg); } }
.compass .needle { fill: var(--oxblood); }
.compass .cardinal { font-family: var(--font-mono); font-size: 10px; fill: var(--ink-soft); }
.compass circle { fill: none; stroke: var(--rule-strong); }

/* ---------- Stamps, seals, plates ---------- */
.seal {
  width: 108px; height: 108px;
  border-radius: 50%;
  border: 2px solid var(--oxblood);
  display: grid;
  place-items: center;
  color: var(--oxblood);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: center;
  transform: rotate(-8deg);
  position: relative;
}
.seal::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--oxblood);
  border-radius: 50%;
  opacity: 0.6;
}

/* Survey line dividers */
.survey-rule {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--track-wider);
  text-transform: uppercase;
  margin-block: var(--space-6);
}
.survey-rule::before, .survey-rule::after {
  content: "";
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--rule) 0 10px, transparent 10px 16px);
}

/* ---------- Timeline (house history) ---------- */
.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 2px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.timeline li { position: relative; padding-left: var(--space-6); }
.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.45em;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 2px solid var(--oxblood);
  background: var(--paper);
}
.timeline .year {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--oxblood);
  letter-spacing: 0.08em;
}

/* ---------- Page transitions ---------- */
@view-transition { navigation: auto; }
html { view-transition-name: root; }
::view-transition-old(root) { animation: chart-out 220ms var(--ease-survey) both; }
::view-transition-new(root) { animation: chart-in 260ms var(--ease-survey) both; }
@keyframes chart-out { to { opacity: 0; transform: translateY(-6px); } }
@keyframes chart-in { from { opacity: 0; transform: translateY(8px); } }

/* ---------- Entrances ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-survey),
              transform var(--dur-slow) var(--ease-survey);
  transition-delay: calc(var(--i, 0) * 90ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Scroll-driven progressive reveals where supported */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .scroll-track {
      animation: scroll-reveal linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 38%;
    }
    @keyframes scroll-reveal {
      from { opacity: 0; transform: translateY(26px); }
    }
    .rule-fill {
      animation: rule-fill linear both;
      animation-timeline: view();
      animation-range: entry 0% cover 45%;
    }
    @keyframes rule-fill {
      from { --rule-progress: 0; }
      to { --rule-progress: 1; }
    }
  }
}

/* ---------- Footer ---------- */
.colophon {
  margin-top: var(--space-9);
  border-top: var(--rule-double) solid var(--rule-strong);
  background: var(--paper-deep);
  position: relative;
}
.colophon::before {
  content: "";
  display: block;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--rule) 0 14px, transparent 14px 20px);
}
.colophon-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-6);
  padding-block: var(--space-7);
}
.colophon h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--track-wider);
  color: var(--ink-faint);
  margin-bottom: var(--space-3);
}
.colophon ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.colophon a { color: var(--ink-soft); text-decoration: none; transition: color var(--dur-fast); }
.colophon a:hover, .colophon a:focus-visible { color: var(--oxblood); }
.colophon-bottom {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-top: var(--rule-width) solid var(--rule);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-faint);
  letter-spacing: var(--track-wide);
  flex-wrap: wrap;
}

/* ---------- Collection filters ---------- */
.filter-bar {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.chip {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  padding: var(--space-2) var(--space-4);
  border: var(--rule-width) solid var(--rule);
  border-radius: var(--radius-pill);
  color: var(--ink-soft);
  transition: all var(--dur-fast) var(--ease-survey);
}
.chip:hover { border-color: var(--rule-strong); color: var(--ink); }
.chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* ---------- Detail page ---------- */
.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: var(--space-7);
  align-items: start;
}
.detail-figure {
  border: var(--rule-width) solid var(--rule);
  background: var(--paper-raised);
  padding: var(--space-5);
  position: sticky;
  top: 90px;
}
.spec-list { display: flex; flex-direction: column; }
.spec-list > div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
  border-bottom: var(--rule-width) solid var(--rule-soft);
  font-size: var(--text-sm);
}
.spec-list dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--track-wide);
  color: var(--ink-faint);
}
.spec-list dd { margin: 0; text-align: right; }

.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--track-wide);
  color: var(--ink-faint);
  padding-block: var(--space-4);
}
.breadcrumb a { color: var(--ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--oxblood); }
.breadcrumb .sep { margin-inline: var(--space-2); }

/* ---------- Journal ---------- */
.journal-entry {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-6);
  padding-block: var(--space-6);
  border-bottom: var(--rule-width) solid var(--rule);
}
.journal-entry .entry-date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-faint);
  letter-spacing: var(--track-wide);
  line-height: 1.7;
}
.prose { max-width: 68ch; }
.prose p + p { margin-top: var(--space-4); }
.prose blockquote {
  border-left: 2px solid var(--brass);
  padding-left: var(--space-4);
  margin-block: var(--space-5);
  font-style: italic;
  color: var(--ink-soft);
  font-size: var(--text-md);
}

/* ---------- 404 ---------- */
.lost-page {
  min-height: 70dvh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--space-8) var(--gutter);
}
.lost-page .coords {
  font-family: var(--font-mono);
  color: var(--ink-faint);
  font-size: var(--text-sm);
  letter-spacing: var(--track-wide);
}

/* ---------- Availability banner ---------- */
.avail-banner {
  background: var(--sea-deep);
  color: oklch(0.96 0.02 84);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  padding: var(--space-2) 0;
  overflow: hidden;
  white-space: nowrap;
}
.avail-banner .ticker {
  display: inline-block;
  animation: ticker 26s linear infinite;
}
@keyframes ticker { to { transform: translateX(-50%); } }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .two-col, .detail-layout, .hero-grid { grid-template-columns: 1fr; }
  .detail-figure { position: static; }
  .colophon-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .primary-nav {
    display: none;
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: var(--paper);
    border-bottom: var(--rule-width) solid var(--rule);
    padding: var(--space-4) var(--gutter) var(--space-6);
  }
  .primary-nav.open { display: block; }
  .primary-nav ul { flex-direction: column; gap: var(--space-4); }
  .nav-toggle { display: inline-flex; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: auto; }
  .journal-entry { grid-template-columns: 1fr; gap: var(--space-2); }
  .colophon-inner { grid-template-columns: 1fr; }
  .hero-coords { position: static; margin-top: var(--space-5); justify-content: flex-start; }
  :root { --text-hero: clamp(2.6rem, 11vw, 4rem); }
}
@media (min-width: 721px) and (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
}

/* ---------- Reduced motion: full stop ---------- */
@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; }
  .coast-svg path { stroke-dashoffset: 0; }
  .avail-banner .ticker, .compass .rose { animation: none; }
  .scroll-track, .rule-fill { animation: none; opacity: 1; transform: none; }
}

/* ---------- Print: chart on paper ---------- */
@media print {
  .masthead, .colophon, .btn, .filter-bar, .toast-region { display: none !important; }
  body { background: white; color: black; }
  .plate, .detail-figure { box-shadow: none; }
}