:root {
  color-scheme: dark;
  --ink: #ebe8e4;
  --paper: #312e2b;
  --card: #262421;
  --muted: #b7b4b0;
  --felt: #1d4d38;
  --felt-2: #2f6b4a;
  --brass: #d7a441;
  --arrow: #81b64c;
  --line: rgba(255, 255, 255, 0.14);
  --light: #e7f2df;
  --dark: #1f6b45;
  --input: #3c3b39;
  --on-felt: #f3f7f1;
  --danger: #f0b4b0;
  --danger-bg: #3a2422;
  --saved: #243028;
}

html[data-theme="light"] {
  color-scheme: light;
  --ink: #17211c;
  --paper: #f4efe4;
  --card: #fffdf8;
  --muted: #5c6b62;
  --felt: #14372a;
  --felt-2: #1d4d38;
  --brass: #d7a441;
  --arrow: #1f9d45;
  --line: rgba(23, 33, 28, 0.14);
  --light: #e7f2df;
  --dark: #1f6b45;
  --input: #fff;
  --on-felt: #f3f7f1;
  --danger: #8a2e2e;
  --danger-bg: #fdecec;
  --saved: #e7f2df;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(215, 164, 65, 0.18), transparent 60%),
    var(--paper);
  font: 18px/1.5 Georgia, "Iowan Old Style", "Palatino Linotype", serif;
}

a { color: inherit; }

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 0 8px;
}

.mark {
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  font-size: 16px;
}

.nav a { text-underline-offset: 3px; }

.top-rest {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
}

.theme {
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  cursor: pointer;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
  padding: 28px 0 18px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.lede {
  margin: 0 0 22px;
  max-width: 38rem;
  font-size: 21px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 240px;
  min-height: 64px;
  padding: 14px 22px;
  border-radius: 14px;
  text-decoration: none;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.cta.chrome { background: var(--ink); color: var(--paper); }
.cta.firefox { background: var(--arrow); color: #f7fff8; }
.cta.test {
  background: transparent;
  color: var(--ink);
  border: 2px solid var(--ink);
}

.poster {
  background: var(--felt);
  color: #f3f7f1;
  border-radius: 22px;
  min-height: 280px;
  padding: 22px;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
  box-shadow: 0 18px 40px rgba(20, 55, 42, 0.18);
}

.poster i {
  aspect-ratio: 1;
  border-radius: 4px;
  background: rgba(231, 242, 223, 0.16);
}

.poster i:nth-child(odd) { background: rgba(231, 242, 223, 0.28); }
.poster i.on { background: var(--brass); }

.note, .panel, .install, .privacy {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.note {
  margin: 8px 0 28px;
  padding: 14px 16px;
  color: var(--muted);
}

.play {
  display: grid;
  grid-template-columns: auto 280px;
  gap: 28px;
  align-items: start;
  padding-bottom: 48px;
}

.board-wrap {
  position: relative;
  width: min(78vw, 560px);
}

.board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 16px 36px rgba(20, 55, 42, 0.16);
}

.sq {
  position: relative;
  display: grid;
  place-items: center;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer;
  background: var(--light);
  color: var(--ink);
}

.sq.dark { background: var(--dark); color: #f4efe4; }
.sq.selected { box-shadow: inset 0 0 0 4px var(--brass); }
.sq.moved { box-shadow: inset 0 0 0 4px rgba(215, 164, 65, 0.7); }
.sq.target::after {
  content: "";
  width: 28%;
  height: 28%;
  border-radius: 50%;
  background: rgba(23, 33, 28, 0.35);
}
.sq.dark.target::after { background: rgba(244, 239, 228, 0.55); }

.piece {
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1;
  pointer-events: none;
}

.arrow {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.panel {
  padding: 18px;
}

.panel h2 { margin: 0 0 8px; font-size: 28px; }
.panel p { margin: 0 0 14px; }

.side-buttons, .restart { display: grid; gap: 8px; }

button.choice, button.restart {
  min-height: 46px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--input);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}

button.choice.active {
  background: var(--felt);
  color: var(--on-felt);
  border-color: var(--felt);
}

.fine { color: var(--muted); font-size: 15px; }

.foot {
  padding: 10px 0 36px;
  color: var(--muted);
  font-size: 15px;
}

.install, .privacy, .sheet { padding: 22px; margin: 18px 0 40px; }
.install h1, .privacy h1, .sheet h1 { font-size: 42px; margin-top: 0; }

.sheet {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.release, .pay { border-top: 1px solid var(--line); margin-top: 18px; padding-top: 8px; }

.release-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.release-head h2, .pay h2 { margin-bottom: 8px; }

.release time, .fine, .missing { color: var(--muted); }

.file-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 16px 0; }

.file-row .cta { min-width: 220px; }

label.stack { display: grid; gap: 6px; margin: 0 0 14px; font-weight: 700; }

label.stack input,
label.stack textarea,
label.stack select {
  font: inherit;
  font-weight: 400;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--input);
  color: var(--ink);
}

label.stack textarea { min-height: 150px; resize: vertical; }

.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

.errors { color: var(--danger); }

.saved { background: var(--saved); color: var(--ink); }

button.send {
  min-height: 52px;
  padding: 0 22px;
  border: 0;
  border-radius: 12px;
  background: var(--felt);
  color: var(--on-felt);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.cta.revolut { background: var(--ink); color: var(--paper); }

.coin {
  display: grid;
  gap: 6px;
  justify-items: start;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.coin code { font-size: 16px; word-break: break-all; }

.example {
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--brass);
  color: #1a1408;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.inbox { width: 100%; border-collapse: collapse; }

.inbox th, .inbox td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px 8px 0;
  border-bottom: 1px solid var(--line);
}

.foot .nav { margin-bottom: 8px; }

.bug-board { margin-top: 28px; }

.bug {
  margin: 0 0 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--input);
}

.bug summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.bug summary::-webkit-details-marker { display: none; }

.bug-title { flex: 1; }

.state, .meta { color: var(--muted); font-weight: 400; font-size: 15px; }

.bug-body { padding: 0 16px 14px 44px; white-space: pre-wrap; }

.tick {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #1f9d45;
  color: #fff;
  font-size: 12px;
  line-height: 1;
}

.spin {
  width: 16px;
  height: 16px;
  flex: none;
  border: 2px solid var(--line);
  border-top-color: var(--arrow);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.disclaimer {
  margin: 16px 0;
  padding: 14px 16px;
  border: 2px solid var(--danger);
  border-radius: 12px;
  background: var(--danger-bg);
  color: var(--danger);
}

.disclaimer p:last-child { margin-bottom: 0; }

.task { border-top: 1px solid var(--line); padding: 14px 0; }

button.choice.on { background: var(--felt); color: var(--on-felt); border-color: var(--felt); }

@media (max-width: 860px) {
  .hero, .play { grid-template-columns: 1fr; }
  .poster { display: none; }
  .cta { width: 100%; }
}