:root {
  --night: #12181c;
  --ink: #162026;
  --panel: #1c272d;
  --dust: #e8dfc8;
  --paper: #efe6d2;
  --lantern: #c9893a;
  --lantern-ink: #1a140c;
  --vein: #6e7b68;
  --rule: #8a7a5a;
  --mute: #9aa39a;
  --shadow: 0 16px 36px rgba(10, 14, 16, 0.28);
  --sans: "Source Sans 3", "Helvetica Neue", sans-serif;
  --serif: "Source Serif 4", "Iowan Old Style", serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 70% -10%, rgba(201, 137, 58, 0.08), transparent 50%),
    var(--night);
  color: var(--dust);
  font-family: var(--sans);
  line-height: 1.5;
}
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; color: inherit; }
a { color: inherit; }

.intro-pending body { overflow: hidden; }
.intro[hidden], [hidden] { display: none !important; }

.intro {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px 28px 28px;
  background: var(--ink);
  color: var(--dust);
}
.intro-bar, .intro-caption {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vein);
}
.intro-stage {
  display: grid;
  place-items: center;
  gap: 28px;
}
.intro-svg { width: min(440px, 78vw); }
.intro-ring, .intro-ring-inner {
  fill: none;
  stroke: #c9b896;
  stroke-width: 1.2;
  stroke-dasharray: 560;
  stroke-dashoffset: 560;
}
.intro-ring-inner { stroke-width: 0.7; opacity: 0.7; }
.intro-vein-l, .intro-vein-r {
  fill: none;
  stroke: var(--dust);
  stroke-width: 1.3;
  stroke-dasharray: 180;
  stroke-dashoffset: 180;
}
.intro-body { fill: var(--dust); opacity: 0; }
.intro-wick {
  stroke: var(--lantern);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 20;
  stroke-dashoffset: 20;
}
.intro-moth { transform-origin: 160px 118px; transform: rotate(-28deg); }
.intro-type { text-align: center; opacity: 0; }
.intro-kicker {
  margin: 0 0 8px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--vein);
}
.intro h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(42px, 8vw, 76px);
  font-weight: 600;
}
.intro-line { margin: 8px 0 0; color: var(--mute); }

.intro.is-playing .intro-wick { animation: draw 0.8s 0.2s ease forwards; }
.intro.is-playing .intro-vein-l,
.intro.is-playing .intro-vein-r { animation: draw 2.2s 1.6s ease forwards; }
.intro.is-playing .intro-body { animation: fade 0.6s 2.8s ease forwards; }
.intro.is-playing .intro-ring,
.intro.is-playing .intro-ring-inner { animation: draw 2.4s 3.2s ease forwards; }
.intro.is-playing .intro-moth { animation: turn 1.6s 5.2s ease forwards; }
.intro.is-playing .intro-type { animation: fade 0.9s 7.4s ease forwards; }

@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }
@keyframes turn { to { transform: rotate(42deg); } }

.nav {
  position: sticky;
  top: 14px;
  z-index: 20;
  margin: 14px auto 0;
  width: min(1180px, calc(100% - 28px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
  background: #1a2328;
  color: var(--dust);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 600;
}
.nav nav { display: flex; gap: 22px; font-size: 14px; }
.nav nav a { text-decoration: none; opacity: 0.86; }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.text-btn, #skip-intro {
  background: none;
  border: 0;
  color: inherit;
  cursor: pointer;
  padding: 0;
  opacity: 0.8;
}
.nav-cta, .lantern-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border: 0;
  border-radius: 999px;
  background: var(--lantern);
  color: var(--lantern-ink);
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}
.desk {
  width: min(1180px, calc(100% - 28px));
  margin: 28px auto 0;
}
.canvas {
  background: var(--paper);
  color: var(--ink);
  border-radius: 32px;
  padding: 18px 18px 22px;
  box-shadow: var(--shadow);
}
.canvas-tag, .eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vein);
}
.canvas-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: 18px;
  margin-top: 14px;
  align-items: stretch;
}
.ring-figure { margin: 0; }
.ring-art {
  width: 100%;
  height: auto;
  cursor: grab;
  touch-action: none;
}
.ring-art:active { cursor: grabbing; }
.night-field { fill: #141c21; }
.ring-outer, .ring-mid, .ring-inner {
  fill: none;
  stroke: #c9b896;
}
.ring-outer { stroke-width: 1.4; }
.ring-mid { stroke-width: 0.7; opacity: 0.7; }
.ring-inner { stroke-width: 0.8; }
.ticks line { stroke: #c9b896; stroke-linecap: round; }
.heading-ray {
  stroke: var(--lantern);
  stroke-width: 1.6;
  stroke-linecap: round;
  pointer-events: none;
}
.moth-layer { pointer-events: none; }
.moth { transform-origin: 260px 260px; }
.wing, .hind { fill: #d8cfb6; stroke: #e8dfc8; stroke-width: 0.6; }
.vein, .antenna {
  fill: none;
  stroke: #6e7b68;
  stroke-width: 0.9;
}
.thorax, .abdomen { fill: #e8dfc8; }
.wick-dot { fill: var(--lantern); }
.ring-figure figcaption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
  padding: 0 8px;
  font-family: var(--serif);
}
#heading-chip {
  font-family: var(--mono);
  background: var(--ink);
  color: var(--dust);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
}
.note-card {
  background: #f7f1e2;
  border-radius: 22px;
  padding: 20px 20px 18px;
  box-shadow: 0 8px 22px rgba(22, 32, 38, 0.08);
}
.note-card h2 {
  margin: 8px 0 8px;
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
}
.bearing-field, .note-field {
  display: block;
  margin: 14px 0;
}
.bearing-field span, .note-field span {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--vein);
}
.bearing-row {
  display: grid;
  grid-template-columns: 1fr 72px auto;
  gap: 8px;
  align-items: center;
}
#bearing-range { width: 100%; accent-color: var(--lantern); }
#bearing-num, #note-input {
  width: 100%;
  border: 1px solid #c8b896;
  border-radius: 10px;
  background: #fffaf0;
  color: var(--ink);
  padding: 8px 10px;
}
#note-input { resize: vertical; min-height: 84px; }
.deg { font-family: var(--mono); }
.lantern-btn { width: 100%; padding: 11px 14px; }
.demo-inline, .demo-note {
  margin: 10px 0 0;
  font-size: 13px;
  color: #5d6558;
}
.canvas-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.pill {
  border: 1px solid #c8b896;
  background: #fffaf0;
  color: var(--ink);
  border-radius: 999px;
  padding: 7px 12px;
  cursor: pointer;
}
.pill.active {
  background: var(--ink);
  color: var(--dust);
  border-color: var(--ink);
}
.ledger {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.ledger li {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  background: var(--panel);
  border-radius: 16px;
}
.ledger time, .ledger button {
  font-family: var(--mono);
  font-size: 13px;
}
.ledger strong { display: block; font-family: var(--serif); }
.ledger small { color: var(--mute); }
.ledger button {
  background: none;
  border: 0;
  color: var(--lantern);
  cursor: pointer;
  padding: 0;
}
.editorial {
  width: min(1180px, calc(100% - 28px));
  margin: 64px auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}
.editorial h2 {
  margin: 10px 0 14px;
  font-family: var(--serif);
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.05;
  font-weight: 600;
}
.editorial-object {
  margin: 0;
  background: var(--paper);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.editorial-object img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.editorial-object figcaption {
  padding: 12px 16px 16px;
  color: var(--ink);
  font-size: 13px;
}
.text-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--lantern);
}
.how {
  width: min(1180px, calc(100% - 28px));
  margin: 72px auto 0;
}
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 18px;
}
.how article {
  padding: 18px 18px 20px;
  border-top: 1px solid #314046;
}
.how span {
  font-family: var(--mono);
  color: var(--lantern);
  font-size: 13px;
}
.how h3 {
  margin: 8px 0;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
}
.slate-btn {
  margin-top: 22px;
  padding: 10px 16px;
  border: 1px solid var(--dust);
  background: transparent;
  color: var(--dust);
  border-radius: 999px;
  cursor: pointer;
}
.footer {
  width: min(1180px, calc(100% - 28px));
  margin: 72px auto 36px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding-top: 22px;
  border-top: 1px solid #314046;
  color: var(--mute);
}
.footer strong { color: var(--dust); font-family: var(--serif); font-size: 22px; }
.footer a { color: var(--lantern); }
.footer small { grid-column: 1 / -1; }

dialog {
  width: min(460px, calc(100% - 32px));
  border: 0;
  border-radius: 22px;
  padding: 28px 26px 24px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
}
dialog::backdrop { background: rgba(10, 14, 16, 0.62); }
dialog h2 {
  margin: 6px 0 10px;
  font-family: var(--serif);
  font-size: 42px;
}
dialog ul { padding-left: 18px; }
.dialog-close {
  position: absolute;
  top: 12px;
  right: 14px;
  border: 0;
  background: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--ink);
}

@media (max-width: 860px) {
  .nav { flex-wrap: wrap; }
  .nav nav { order: 3; width: 100%; justify-content: space-between; }
  .canvas-stage, .editorial, .how-grid, .footer { grid-template-columns: 1fr; }
  .ledger li { grid-template-columns: 1fr auto; }
  .ledger time { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}