/* ============================================================
   Tubature — Game (reconnect the circuit)
   ============================================================ */

:root {
  --color-bg: #eef1f4;
  --color-cell: #f8fafc;
  --color-cell-line: #e2e8f0;
  --color-border: #cbd5e1;
  --color-divider: #e2e8f0;

  --color-text: #1e2937;
  --color-text-muted: #64748b;

  --color-primary: #0ea5e9;

  --color-largest: #f59e0b;
  --color-success: #16a34a;

  --comp-0: #fefce8;
  --comp-1: #f1f5f9;
  --comp-2: #f3e8ff;
  --comp-3: #e0f2fe;
  --comp-4: #ecfdf5;
  --comp-5: #fee2e2;
  --comp-6: #fce7f3;
  --comp-7: #ffedd5;
  --comp-8: #f5f5f4;
  --comp-9: #cffafe;
  --comp-10: #ede9fe;
  --comp-11: #dcfce7;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;

  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  --transition: 160ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================================
   Base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100dvh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.4;
}

h1 {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.15rem;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 0.375rem;
}

/* ============================================================
   Layout
   ============================================================ */
.app-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: white;
  border-bottom: 1px solid var(--color-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: brightness(0.85) contrast(1.1);
}

.app-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-2);
  max-width: 900px;
  margin: 0 auto;
}

/* ============================================================
   Status bar (above the board)
   ============================================================ */
.status-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding: var(--space-2) var(--space-3);
  background: white;
  border-radius: var(--radius-md);
}

.status-text {
  min-width: 0;
}

.status-text p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.win-message {
  font-weight: 700;
  color: var(--color-success) !important;
}

.stats-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.stats-inline > div {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.stats-inline dt {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.stats-inline dd {
  font-family: ui-monospace, monospace;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

@media (max-width: 480px) {
  .stats-inline {
    gap: var(--space-1) var(--space-2);
  }

  .stats-inline dt {
    font-size: 0.6rem;
  }

  .stats-inline dd {
    font-size: 0.8rem;
  }

  .status-text p {
    font-size: 0.75rem;
  }
}

/* ============================================================
   Toolbar
   ============================================================ */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: white;
  border-radius: var(--radius-md);
}

.btn {
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #f8fafc;
  color: var(--color-text);
  font-size: 0.85rem;
  font-weight: 500;
}

.btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn.is-active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

.btn.has-moves {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

.tool-sep {
  width: 1px;
  height: 20px;
  background: var(--color-divider);
}

.legend-inline {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.legend-inline li {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.sw-row {
  display: flex;
  gap: 0.2rem;
}

.sw {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.sw.largest { background: #fef3c7; border-color: #f6a417; }
.sw.comp-0  { background: var(--comp-0); }
.sw.comp-1  { background: var(--comp-1); }
.sw.comp-2  { background: var(--comp-2); }
.sw.comp-3  { background: var(--comp-3); }
.sw.comp-4  { background: var(--comp-4); }
.sw.comp-5  { background: var(--comp-5); }
.sw.comp-6  { background: var(--comp-6); }
.sw.comp-7  { background: var(--comp-7); }
.sw.comp-8  { background: var(--comp-8); }
.sw.comp-9  { background: var(--comp-9); }
.sw.comp-10 { background: var(--comp-10); }
.sw.comp-11 { background: var(--comp-11); }

/* ============================================================
   Board
   ============================================================ */
.board-wrap {
  line-height: 0;
}

.grid-svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  background: white;
  user-select: none;
}

.grid-svg .cell {
  fill: var(--color-cell);
  stroke: var(--color-cell-line);
  stroke-width: 1;
  cursor: pointer;
  transition: fill 0.1s;
}

.grid-svg .cell:hover {
  filter: brightness(1.12) saturate(1.15) !important;
}

.grid-svg .cell.comp-0  { fill: var(--comp-0); }
.grid-svg .cell.comp-1  { fill: var(--comp-1); }
.grid-svg .cell.comp-2  { fill: var(--comp-2); }
.grid-svg .cell.comp-3  { fill: var(--comp-3); }
.grid-svg .cell.comp-4  { fill: var(--comp-4); }
.grid-svg .cell.comp-5  { fill: var(--comp-5); }
.grid-svg .cell.comp-6  { fill: var(--comp-6); }
.grid-svg .cell.comp-7  { fill: var(--comp-7); }
.grid-svg .cell.comp-8  { fill: var(--comp-8); }
.grid-svg .cell.comp-9  { fill: var(--comp-9); }
.grid-svg .cell.comp-10 { fill: var(--comp-10); }
.grid-svg .cell.comp-11 { fill: var(--comp-11); }

.grid-svg .cell.is-largest {
  fill: #fef3c7 !important;
}

.grid-svg .largest-border {
  stroke: #f6a417;
  stroke-width: 4;
  stroke-linecap: square;
}

.grid-svg image {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  pointer-events: none;
}

.hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  font-family: monospace;
  padding: var(--space-1) 0;
}