:root {
  --bg: oklch(98% 0.004 90);
  --surface: oklch(100% 0.002 90);
  --fg: oklch(20% 0.018 70);
  --muted: oklch(48% 0.012 70);
  --border: oklch(88% 0.008 90);
  --accent: oklch(48% 0.11 35);
  --accent-2: oklch(55% 0.1 190);
  --success: oklch(48% 0.12 145);
  --warn: oklch(58% 0.13 75);
  --danger: oklch(52% 0.13 25);
  --group-a: oklch(92% 0.032 60);
  --group-b: oklch(92% 0.036 145);
  --group-c: oklch(92% 0.032 230);
  --group-d: oklch(93% 0.04 315);
  --font-display: "Iowan Old Style", Charter, Georgia, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", ui-monospace, Menlo, monospace;
  --radius: 6px;
  --tile-radius: 4px;
  --shadow: none;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); color: var(--fg); }
body {
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 var(--font-body);
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
button, input, textarea { font: inherit; }

.launcher {
  --bg: oklch(98% 0.004 240);
  --surface: oklch(100% 0 0);
  --fg: oklch(18% 0.012 250);
  --muted: oklch(50% 0.012 250);
  --border: oklch(90% 0.006 250);
  --accent: oklch(50% 0.12 210);
  --font-display: "Iowan Old Style", Charter, Georgia, serif;
}
.launch-wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 56px 0; }
.launch-header { max-width: 760px; margin-bottom: 28px; }
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font: 700 12px/1 var(--font-mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.launch-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(38px, 7vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.025em;
}
.launch-copy { max-width: 62ch; color: var(--muted); font-size: 18px; }
.direction-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.direction-card {
  min-height: 280px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.direction-card:hover { border-color: color-mix(in oklch, var(--accent), var(--border) 35%); }
.direction-label {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: var(--accent);
  font-family: var(--font-mono);
}
.direction-card h2 { margin: auto 0 8px; font: 600 28px/1.1 var(--font-display); letter-spacing: -0.015em; }
.direction-card p { margin: 0; color: var(--muted); max-width: 34ch; }

.newspaper {
  --bg: oklch(97% 0.008 92);
  --surface: oklch(99% 0.004 92);
  --fg: oklch(19% 0.018 70);
  --muted: oklch(43% 0.012 70);
  --border: oklch(76% 0.012 85);
  --accent: oklch(43% 0.11 28);
  --accent-2: oklch(45% 0.07 210);
  --group-a: oklch(91% 0.035 55);
  --group-b: oklch(90% 0.028 140);
  --group-c: oklch(90% 0.025 235);
  --group-d: oklch(91% 0.03 315);
  --font-display: "Iowan Old Style", "Times New Roman", Georgia, serif;
  --font-body: "Avenir Next", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 3px;
  --tile-radius: 2px;
}
.lab {
  --bg: oklch(98.5% 0.006 215);
  --surface: oklch(100% 0 0);
  --fg: oklch(18% 0.016 245);
  --muted: oklch(48% 0.018 235);
  --border: oklch(88% 0.012 230);
  --accent: oklch(50% 0.12 198);
  --accent-2: oklch(53% 0.1 150);
  --group-a: oklch(92% 0.04 205);
  --group-b: oklch(92% 0.036 150);
  --group-c: oklch(93% 0.034 265);
  --group-d: oklch(93% 0.038 75);
  --font-display: "Avenir Next", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --radius: 12px;
  --tile-radius: 10px;
  --shadow: 0 18px 45px oklch(60% 0.04 230 / 0.12);
}
.friendly {
  --bg: oklch(98% 0.012 160);
  --surface: oklch(100% 0 0);
  --fg: oklch(20% 0.02 180);
  --muted: oklch(47% 0.022 180);
  --border: oklch(88% 0.018 165);
  --accent: oklch(50% 0.13 165);
  --accent-2: oklch(58% 0.11 65);
  --group-a: oklch(92% 0.048 165);
  --group-b: oklch(93% 0.05 80);
  --group-c: oklch(92% 0.04 240);
  --group-d: oklch(93% 0.045 330);
  --font-display: "Avenir Next", "Trebuchet MS", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --radius: 16px;
  --tile-radius: 14px;
  --shadow: 0 20px 50px oklch(55% 0.05 170 / 0.13);
}

.site-shell { width: min(1180px, calc(100% - 28px)); margin: 0 auto; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 18px 0 10px;
  border-bottom: 1px solid var(--border);
}
.brand-lockup { display: flex; flex-direction: column; gap: 2px; }
.brand-name { font: 700 18px/1.1 var(--font-display); letter-spacing: -0.01em; }
.date-stamp { color: var(--muted); font: 600 11px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; }
.nav-links { display: flex; gap: 16px; color: var(--muted); font-size: 14px; font-weight: 540; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--fg); }

.game-hero {
  min-height: calc(100vh - 72px);
  padding: 20px 0 36px;
  display: grid;
  align-items: start;
}
.game-layout { display: grid; gap: 18px; }
.game-panel, .result-panel, .content-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.game-panel { padding: 16px; }
.puzzle-kicker { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-bottom: 12px; }
.puzzle-kicker .eyebrow { margin: 0; }
.mistakes-pill {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--muted);
  font: 650 12px/1 var(--font-mono);
}
.puzzle-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(30px, 8.5vw, 54px);
  line-height: 1.02;
  letter-spacing: -0.024em;
}
.puzzle-intro { margin: 0 0 16px; max-width: 60ch; color: var(--muted); }
.board-meta { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.selected-count { font-weight: 700; letter-spacing: 0.01em; }
.status-line { color: var(--muted); font-size: 14px; text-align: right; }
.status-line[data-tone="success"] { color: var(--success); }
.status-line[data-tone="warn"] { color: var(--warn); }
.status-line[data-tone="danger"] { color: var(--danger); }
.number-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}
.number-tile {
  min-height: 58px;
  border: 1px solid var(--border);
  border-radius: var(--tile-radius);
  background: color-mix(in oklch, var(--surface), var(--bg) 30%);
  color: var(--fg);
  font: 720 clamp(20px, 6vw, 30px)/1 var(--font-display);
  letter-spacing: -0.02em;
  cursor: pointer;
  transition: transform 140ms cubic-bezier(0.23, 1, 0.32, 1), background 140ms, border-color 140ms;
  touch-action: manipulation;
}
.number-tile:active { transform: translateY(1px); }
.number-tile.selected {
  background: color-mix(in oklch, var(--accent), var(--surface) 80%);
  border-color: color-mix(in oklch, var(--accent), var(--border) 35%);
}
.number-tile.locked {
  background: color-mix(in oklch, var(--success), var(--surface) 86%);
  color: color-mix(in oklch, var(--fg), var(--success) 12%);
}
.actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.btn {
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: calc(var(--tile-radius) + 2px);
  background: var(--surface);
  color: var(--fg);
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: oklch(99% 0.003 90);
}
.btn.secondary { color: var(--accent-2); }
.btn:disabled { opacity: 0.42; cursor: not-allowed; }
.result-panel { padding: 14px; }
.panel-heading {
  margin: 0 0 10px;
  font: 700 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.found-groups { display: grid; gap: 8px; }
.found-group {
  padding: 12px;
  border-radius: calc(var(--tile-radius) + 2px);
  border: 1px solid var(--border);
  display: grid;
  gap: 2px;
}
.found-group strong { font-size: 15px; }
.found-group span { color: var(--muted); font-family: var(--font-mono); font-size: 13px; }
.group-a { background: var(--group-a); }
.group-b { background: var(--group-b); }
.group-c { background: var(--group-c); }
.group-d { background: var(--group-d); }
.empty-note { margin: 0; color: var(--muted); }
.share-result {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed var(--border);
  border-radius: var(--tile-radius);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}
.design-note {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}
.content-stack { display: grid; gap: 16px; padding: 22px 0 56px; }
.content-section { padding: 18px; }
.content-section h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.12;
  letter-spacing: -0.016em;
}
.content-section p, .content-section li { color: var(--muted); }
.content-section p { margin: 0 0 10px; max-width: 70ch; }
.steps, .faq-list, .related-list { margin: 0; padding-left: 20px; }
.daily-card {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
}
.mini-stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.mini-stat {
  border: 1px solid var(--border);
  border-radius: var(--tile-radius);
  padding: 10px;
}
.mini-stat strong { display: block; font-family: var(--font-mono); }
.mini-stat span { color: var(--muted); font-size: 13px; }

.newspaper .game-panel, .newspaper .result-panel, .newspaper .content-section { border-radius: 0; }
.newspaper .topbar { border-top: 3px double var(--border); }
.newspaper .brand-name { font-size: 22px; }
.newspaper .game-panel { border-width: 1.5px; }
.newspaper .number-tile { box-shadow: inset 0 -1px 0 var(--border); }

.lab .topbar { border-bottom-style: dashed; }
.lab .game-layout { align-items: start; }
.lab .game-panel { position: relative; }
.lab .game-panel::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid color-mix(in oklch, var(--border), transparent 45%);
  border-radius: calc(var(--radius) - 4px);
  pointer-events: none;
}
.lab .number-grid { gap: 10px; }
.lab .number-tile { font-family: var(--font-body); }

.friendly .brand-name { font-family: var(--font-display); }
.friendly .game-panel, .friendly .result-panel, .friendly .content-section { border-width: 1.2px; }
.friendly .number-tile { min-height: 62px; }
.friendly .btn { border-radius: 999px; }

@media (min-width: 860px) {
  .game-layout {
    grid-template-columns: minmax(0, 1.1fr) 360px;
    align-items: start;
  }
  .game-panel { padding: 22px; }
  .number-grid { gap: 10px; }
  .number-tile { min-height: 82px; }
  .result-panel { position: sticky; top: 18px; padding: 18px; }
  .content-stack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .content-section.featured { grid-column: span 2; }
  .daily-card { grid-template-columns: 1fr 1fr; align-items: start; }
}

@media (max-width: 720px) {
  .direction-grid { grid-template-columns: 1fr; }
  .launch-wrap { padding: 36px 0; }
  .topbar { align-items: flex-start; }
  .nav-links { display: none; }
  .game-hero { min-height: auto; padding-top: 14px; }
  .actions { grid-template-columns: repeat(2, 1fr); }
  .status-line { font-size: 13px; }
}