/* ---- Reset & base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #f5f5f0;
  --color-surface: #ffffff;
  --color-border: #d0d0c8;
  --color-text: #1a1a1a;
  --color-muted: #666;
  --color-primary: #2a6bb5;
  --color-primary-dark: #1e4f85;
  --color-invalid: #e53e3e;
  --color-invalid-bg: #fff5f5;
  --cell-region-border: 3px solid #555;
  --cell-thin-border: 1px solid rgba(0,0,0,0.15);

  /* Color region palette (14 colors) */
  --c0:  #f28b82; /* Red    */
  --c1:  #aecbfa; /* Blue   */
  --c2:  #ccff90; /* Green  */
  --c3:  #fbbc04; /* Orange */
  --c4:  #d7aefb; /* Purple */
  --c5:  #fff475; /* Yellow */
  --c6:  #a8dab5; /* Teal   */
  --c7:  #f6aea9; /* Pink   */
  --c8:  #e6c9a8; /* Brown  */
  --c9:  #b3f0c8; /* Lime   */
  --c10: #b0c4ef; /* Indigo */
  --c11: #f4b8c1; /* Coral  */
  --c12: #c8cdd4; /* Slate  */
  --c13: #ffe9a0; /* Gold   */
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

/* ---- Views ---- */
#view-list {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

#view-list h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--color-muted);
  margin-bottom: 2rem;
  line-height: 1.5;
}

/* ---- Puzzle grid ---- */
.puzzle-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 0.5rem;
}

.puzzle-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.4rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: box-shadow 0.15s, transform 0.1s;
  font-family: inherit;
}

.puzzle-card:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transform: translateY(-1px);
}

.puzzle-name {
  font-weight: 600;
  font-size: 0.85rem;
}

.puzzle-card-done {
  background: #e8f5e9;
  border-color: #a5d6a7;
}

.puzzle-star {
  color: #f59e0b;
  font-size: 0.75rem;
  margin-right: 0.2rem;
  line-height: 1;
}

.puzzle-size {
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ---- Game view ---- */
#view-game {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.game-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.game-nav {
  display: flex;
  gap: 0.25rem;
}

.btn-nav {
  background: var(--color-primary);
  border: none;
  border-radius: 6px;
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 500;
  color: #fff;
  line-height: 1;
  white-space: nowrap;
}

.btn-nav:hover:not(:disabled) { background: var(--color-primary-dark); }
.btn-nav:disabled { opacity: 0.25; cursor: default; }

.game-header h2 {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  margin-right: 0.5rem;
}

.timer {
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--color-muted);
}

#view-game main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

.board-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: min(90vw, 90vh, 520px);
}

.board-top-bar {
  width: min(90vw, 90vh, 520px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 6px;
}

/* ---- Completion panel ---- */
.completion-panel {
  width: min(90vw, 90vh, 520px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.completion-panel h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.completion-panel .completion-time {
  font-size: 1rem;
  color: var(--color-muted);
}

.completion-panel .completion-time strong {
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.completion-panel .completion-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.completion-panel input {
  flex: 1;
  min-width: 0;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
}

.completion-panel .form-error {
  color: var(--color-invalid);
  font-size: 0.85rem;
}

.btn-secondary {
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--color-primary);
  white-space: nowrap;
}
.btn-secondary:hover { background: rgba(42,107,181,0.08); }

/* ---- Board ---- */
.board {
  display: grid;
  grid-template-columns: repeat(var(--board-size), 1fr);
  grid-template-rows: repeat(var(--board-size), 1fr);
  gap: 0;
  border: var(--cell-region-border);
  border-radius: 4px;
  overflow: hidden;
  width: min(90vw, 90vh, 520px);
  height: min(90vw, 90vh, 520px);
  user-select: none;
  touch-action: none;
}

/* ---- Cell ---- */
.cell {
  display: flex;
  align-items: center;
  justify-content: center;
  border: var(--cell-thin-border);
  cursor: pointer;
  position: relative;
  font-size: calc(min(90vw, 90vh, 520px) / var(--board-size) * 0.55);
  line-height: 1;
  overflow: hidden;
  min-height: 0;
  min-width: 0;
  transition: filter 0.1s;
  -webkit-tap-highlight-color: transparent;
}

/* Region border overrides */
.cell.border-top    { border-top:    var(--cell-region-border); }
.cell.border-bottom { border-bottom: var(--cell-region-border); }
.cell.border-left   { border-left:   var(--cell-region-border); }
.cell.border-right  { border-right:  var(--cell-region-border); }

/* Color regions */
.cell.color-0  { background: var(--c0);  }
.cell.color-1  { background: var(--c1);  }
.cell.color-2  { background: var(--c2);  }
.cell.color-3  { background: var(--c3);  }
.cell.color-4  { background: var(--c4);  }
.cell.color-5  { background: var(--c5);  }
.cell.color-6  { background: var(--c6);  }
.cell.color-7  { background: var(--c7);  }
.cell.color-8  { background: var(--c8);  }
.cell.color-9  { background: var(--c9);  }
.cell.color-10 { background: var(--c10); }
.cell.color-11 { background: var(--c11); }
.cell.color-12 { background: var(--c12); }
.cell.color-13 { background: var(--c13); }

/* Cell states */
.cell.state-x {
  color: #555;
}

.cell.state-queen {
  color: #111;
}

.cell.state-invalid {
  color: var(--color-invalid);
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25%       { transform: translateX(-3px); }
  75%       { transform: translateX(3px); }
}

/* ---- Buttons ---- */
.btn-back {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary);
  font-size: 0.95rem;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  white-space: nowrap;
  font-family: inherit;
}

.btn-back:hover { background: rgba(42,107,181,0.08); }

.btn-icon {
  background: none;
  border: 1px solid var(--color-border);
  cursor: pointer;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--color-text);
}

.btn-icon:hover { background: rgba(0,0,0,0.05); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  font-family: inherit;
  font-weight: 500;
}

.btn-primary:hover   { background: var(--color-primary-dark); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-replay {
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--color-primary);
  white-space: nowrap;
  text-decoration: none;
}

.btn-replay:hover { background: rgba(42,107,181,0.08); }

.action-col { display: flex; gap: 0.35rem; align-items: center; }

.btn-copy {
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--color-primary);
  white-space: nowrap;
}

.btn-copy:hover { background: rgba(42,107,181,0.08); }

.btn-copy-done {
  background: #22c55e;
  color: #fff;
  border-color: #22c55e;
}

.btn-copy-done:hover { background: #16a34a; }

.attempt-tag {
  display: inline-block;
  font-size: 0.7rem;
  color: var(--color-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  margin-left: 0.4rem;
  vertical-align: middle;
  white-space: nowrap;
}

.btn-toggle-all {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-size: 0.8rem;
  font-family: inherit;
  color: var(--color-muted);
  text-decoration: underline;
  align-self: flex-start;
}

.btn-toggle-all:hover { color: var(--color-text); }

/* ---- Inline leaderboard table (inside completion panel) ---- */
.leaderboard-inline-table {
  width: 100%;
  border-collapse: collapse;
}

.leaderboard-inline-table th,
.leaderboard-inline-table td {
  text-align: left;
  padding: 0.5rem 0.4rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.leaderboard-inline-table th {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.leaderboard-inline-table .time-col {
  font-variant-numeric: tabular-nums;
}

.leaderboard-inline-table tr.highlight td {
  background: rgba(42,107,181,0.08);
  font-weight: 600;
}

/* ---- Leaderboard view ---- */
#view-leaderboard {
  max-width: 560px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

#view-leaderboard h2 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.your-time {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.submit-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.submit-form label {
  font-weight: 500;
}

.submit-form input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  width: 100%;
}

.form-error {
  color: var(--color-invalid);
  font-size: 0.9rem;
}

.leaderboard-entries table {
  width: 100%;
  border-collapse: collapse;
}

.leaderboard-entries th,
.leaderboard-entries td {
  text-align: left;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.leaderboard-entries th {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.leaderboard-entries .time-col {
  font-variant-numeric: tabular-nums;
}

.leaderboard-entries tr.highlight td {
  background: rgba(42,107,181,0.08);
  font-weight: 600;
}

.empty {
  color: var(--color-muted);
  margin-top: 1rem;
}

/* ---- Spoiler gate ---- */
.spoiler-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.spoiler-gate-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.spoiler-gate-box p {
  line-height: 1.5;
}

.spoiler-gate-buttons {
  display: flex;
  gap: 0.75rem;
}

/* ---- Replay view ---- */
.replay-viewer {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
  gap: 1rem;
  min-height: 100vh;
}

.replay-header {
  font-size: 1rem;
  color: var(--color-muted);
  text-align: center;
}

.replay-header strong {
  color: var(--color-text);
}

.replay-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.replay-controls label {
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.replay-controls select {
  font-size: 0.9rem;
  padding: 0.25rem 0.4rem;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  font-family: inherit;
}

.replay-progress-wrap {
  width: min(90vw, 520px);
  padding: 10px 0;
  cursor: pointer;
  touch-action: none;
}

.replay-progress {
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  position: relative;
}

.replay-progress-marker {
  position: absolute;
  top: -7px;
  width: 6px;
  height: 20px;
  border-radius: 3px;
  transform: translateX(-50%);
  border: 1.5px solid currentColor;
  cursor: default;
}

.replay-progress-marker::before {
  content: '♛';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 14px;
  line-height: 1;
  margin-bottom: 4px;
  color: inherit;
  pointer-events: none;
}

.replay-progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  width: 0%;
  pointer-events: none;
}

/* ---- Utility ---- */
.loading { color: var(--color-muted); padding: 2rem; text-align: center; }
.error   { color: var(--color-invalid); padding: 2rem; text-align: center; }

/* ---- Mobile tweaks ---- */
@media (max-width: 480px) {
  .game-header { gap: 0.5rem; }
  .game-header h2 { font-size: 0.95rem; }
}