:root {
  --bg: #fafaf7;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --line: #d6d6d0;
  --tile: #f1f0ec;
  --green: #5fa55a;
  --yellow: #d4b94a;
  --gray: #9a9a96;
  --accent: #2b2b2b;
  --radius: 6px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.4;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

header h1 {
  font-size: 1.5rem;
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.icon-btn {
  background: none;
  border: 1px solid var(--line);
  color: var(--fg);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
}
.icon-btn:hover { background: var(--tile); }

main {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}

.puzzle-meta {
  text-align: center;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-bottom: 12px;
}
.puzzle-meta .dot { margin: 0 6px; }

.outline-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}
.outline-box {
  width: 180px;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: var(--tile);
  border-radius: var(--radius);
  padding: 12px;
}
.outline-box svg {
  width: 100%;
  height: 100%;
  display: block;
}
.outline-placeholder {
  color: var(--muted);
  font-style: italic;
}

.grid-headers {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.2fr 1fr 0.7fr;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.05em;
  padding: 0 4px 4px;
}
.grid-headers span { text-align: center; }
.grid-headers span:first-child { text-align: left; padding-left: 8px; }

.guess-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
  min-height: 240px;
}

.row {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.2fr 1fr 0.7fr;
  gap: 4px;
}
.row.empty .cell {
  background: transparent;
  border: 1px dashed var(--line);
  color: transparent;
}
.cell {
  background: var(--tile);
  border-radius: var(--radius);
  padding: 10px 8px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 500;
  min-height: 38px;
  transition: background-color 200ms ease;
}
.cell.name {
  justify-content: flex-start;
  padding-left: 12px;
  font-weight: 600;
}
.cell.green  { background: var(--green);  color: white; }
.cell.yellow { background: var(--yellow); color: white; }
.cell.gray   { background: var(--gray);   color: white; }

.cell .dir-arrow {
  display: inline-block;
  font-size: 1.1rem;
  transform-origin: center;
}

#guess-form {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
#guess-input {
  flex: 1;
  padding: 10px 12px;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
}
#guess-input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
#guess-btn, button.primary {
  padding: 10px 16px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  font-size: 1rem;
}
#guess-btn:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary:hover { background: #000; }

.end-state {
  margin-top: 16px;
  text-align: center;
  padding: 14px;
  background: var(--tile);
  border-radius: var(--radius);
}
.end-state.hidden { display: none; }
.end-state p { margin: 0 0 10px; font-size: 1.05rem; font-weight: 500; }

.note {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  margin-top: 16px;
  min-height: 1.2em;
}

/* dialogs */
dialog {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px;
  max-width: 420px;
  width: calc(100% - 32px);
  background: var(--bg);
  color: var(--fg);
}
dialog::backdrop { background: rgba(0,0,0,0.4); }
dialog h2 { margin: 0 0 12px; }
dialog ul { padding-left: 20px; }
dialog li { margin-bottom: 6px; }
dialog .fine { color: var(--muted); font-size: 0.85rem; }
dialog button {
  margin-top: 10px;
  padding: 8px 16px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}
.legend {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 3px;
  color: white;
  font-size: 0.85em;
}
.legend.g { background: var(--green); }
.legend.y { background: var(--yellow); }

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 12px 0;
}
.stats-row div { text-align: center; }
.stats-row b { display: block; font-size: 1.5rem; }
.stats-row span { font-size: 0.75rem; color: var(--muted); }

.dist {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
}
.dist .bar {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
}
.dist .bar .label { width: 12px; font-family: var(--font-mono); }
.dist .bar .fill {
  background: var(--accent);
  color: white;
  text-align: right;
  padding: 2px 6px;
  border-radius: 3px;
  min-width: 24px;
  font-size: 0.8rem;
}

@media (max-width: 420px) {
  .cell { font-size: 0.78rem; padding: 8px 4px; }
  .cell.name { padding-left: 8px; }
  .grid-headers { font-size: 0.65rem; }
  .outline-box { width: 150px; height: 150px; }
}