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

:root {
  --bg: #0a0a1a;
  --surface: #151530;
  --text: #e8e8f0;
  --text-dim: #8888aa;
  --accent: #c8a030;
  --group-0: #7b2d8e;
  --group-1: #1a8a7a;
  --group-2: #b8860b;
  --group-3: #2e6eb5;
  --selected: #3a3a5a;
  --wrong: #8b2020;
  --tile: #1e1e3a;
  --tile-hover: #2a2a4a;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

#app {
  width: 100%;
  max-width: 720px;
  padding: 20px;
}

header {
  text-align: center;
  padding: 20px 0;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 0.05em;
}

.accent {
  color: var(--accent);
  font-weight: 700;
}

/* Screens */
.screen {
  display: none;
}

.screen.active {
  display: block;
}

/* Menu */
.menu-card {
  background: var(--surface);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
}

.menu-card h2 {
  margin-bottom: 20px;
  font-weight: 400;
}

/* Stats bar */
.stats-bar {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 16px;
  padding: 8px 0;
  border-bottom: 1px solid #1e1e3a;
}

/* Episode list */
#episode-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
  max-height: 60vh;
  overflow-y: auto;
  text-align: left;
}

/* Series collapsible blocks */
.series-header {
  background: var(--tile);
  border: none;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  width: 100%;
  text-align: left;
  transition: background 0.15s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.series-header:hover {
  background: var(--tile-hover);
}

.series-stats {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-dim);
}

.series-stats.complete {
  color: var(--accent);
}

.series-body {
  display: none;
  flex-direction: column;
  gap: 3px;
  padding: 4px 0 4px 12px;
}

.series-block.open .series-body {
  display: flex;
}

.episode-btn {
  background: transparent;
  border: none;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: default;
  font-size: 0.85rem;
  text-align: left;
  transition: background 0.15s;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.episode-btn:hover {
  background: var(--tile);
}

.episode-title-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.episode-btn .wall-labels {
  display: flex;
  gap: 5px;
  flex-shrink: 0;
}

.wall-label {
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.wall-label:hover {
  opacity: 0.8;
}

.wall-label-done {
  background: var(--text-dim);
  color: var(--bg);
}

.wall-label-perfect {
  background: var(--group-1);
  color: #fff;
}

/* Buttons */
.btn {
  background: var(--tile);
  border: none;
  color: var(--text);
  padding: 12px 28px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.15s;
}

.btn:hover {
  background: var(--tile-hover);
}

.btn-accent {
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
}

.btn-accent:hover {
  background: #d4ad3a;
}

.quit-btn {
  padding: 6px 16px;
  font-size: 0.8rem;
}

/* Game Header */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.game-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.wall-badge {
  background: var(--accent);
  color: var(--bg);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 600;
}

/* Wall Footer — timer bar + guess pips */
.wall-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  height: 28px;
}

.guess-pips {
  display: flex;
  gap: 5px;
  min-width: 70px;
  align-items: center;
}

.pip {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2.5px solid #4a9edd;
  background: transparent;
  transition: opacity 0.3s, transform 0.3s;
}

.pip.used {
  opacity: 0.15;
  transform: scale(0.7);
}

.timer-bar-track {
  flex: 1;
  height: 10px;
  background: #1a1a35;
  border-radius: 5px;
  overflow: hidden;
}

.timer-bar-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #2a5a9a, #4a9edd);
  border-radius: 5px;
  transition: width 1s linear;
}

.timer-bar-fill.warning {
  background: linear-gradient(90deg, #8b2020, #cc4444);
}

.timer-text {
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  min-width: 36px;
  text-align: right;
}

/* Wall Grid */
.wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

/* Solved group row */
.solved-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  animation: solveIn 0.4s ease-out;
}

.solved-row .tile {
  cursor: default;
}

.solved-row .connection-label {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 2px 0 4px;
  color: rgba(255, 255, 255, 0.9);
}

.solved-row-static {
  animation: none;
}

@keyframes solveIn {
  from { transform: scale(0.95); opacity: 0.5; }
  to { transform: scale(1); opacity: 1; }
}

/* Tiles */
.tile {
  aspect-ratio: 2.2 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8px 6px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.2;
  transition: background 0.12s, transform 0.1s;
  user-select: none;
  background: var(--tile);
  word-break: break-word;
}

.tile:hover:not(.solved):not(.tile-disabled) {
  background: var(--tile-hover);
  transform: scale(1.02);
}

.tile.selected {
  background: var(--selected);
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  transform: scale(1.03);
}

.tile.wrong {
  animation: shake 0.4s ease-out;
  background: var(--wrong);
}

.tile.solved {
  cursor: default;
  color: #fff;
}

.tile.group-0 { background: var(--group-0); }
.tile.group-1 { background: var(--group-1); }
.tile.group-2 { background: var(--group-2); }
.tile.group-3 { background: var(--group-3); }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* Toast */
.toast {
  text-align: center;
  margin-top: 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  opacity: 0;
  transform: translateY(4px);
  pointer-events: none;
  transition: none;
}

.toast.visible {
  animation: toastFade 2s ease-out forwards;
}

@keyframes toastFade {
  0% { opacity: 0; transform: translateY(4px); }
  12% { opacity: 1; transform: translateY(0); }
  70% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-4px); }
}

/* Message */
.message {
  text-align: center;
  margin-top: 16px;
  font-size: 1rem;
  min-height: 1.5em;
  color: var(--text-dim);
}

.message.success {
  color: var(--accent);
}

.message.fail {
  color: var(--wrong);
}

/* Results */
#results-screen {
  text-align: center;
}

#results-screen h2 {
  margin-bottom: 24px;
  font-weight: 400;
}

#results-groups {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.result-group {
  border-radius: 10px;
  padding: 14px;
  color: #fff;
}

.result-group .connection {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.result-group .clues {
  font-size: 0.85rem;
  opacity: 0.9;
}

.result-group.found {
  opacity: 1;
}

.result-group.missed {
  opacity: 0.75;
}

.results-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.results-actions .btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.reveal-btn {
  display: inline-block;
  margin-top: 8px;
  padding: 6px 18px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.15s;
}

.reveal-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.knew-prompt {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 0.82rem;
}

.knew-btn {
  padding: 4px 14px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.15s;
}

.knew-btn:hover {
  background: rgba(255, 255, 255, 0.25);
}

.knew-answer {
  margin-top: 8px;
  font-size: 0.78rem;
  opacity: 0.8;
}

/* Menu buttons row */
.menu-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* Stats page */
#stats-content {
  text-align: left;
  margin-bottom: 24px;
}

.stat-section {
  margin-bottom: 20px;
}

.stat-section h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
  padding-bottom: 4px;
  border-bottom: 1px solid #1e1e3a;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat-item {
  background: var(--tile);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 2px;
}

/* Score distribution bar chart */
.score-dist {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 80px;
  padding-top: 8px;
}

.score-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
}

.score-bar {
  width: 100%;
  border-radius: 3px 3px 0 0;
  background: var(--accent);
  min-height: 0;
  transition: height 0.3s;
}

.score-bar-label {
  font-size: 0.6rem;
  color: var(--text-dim);
  margin-top: 3px;
}

.score-bar-count {
  font-size: 0.6rem;
  color: var(--text-dim);
  margin-bottom: 2px;
}

/* Series completion bars */
.series-bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
  font-size: 0.78rem;
}

.series-bar-label {
  min-width: 28px;
  text-align: right;
  color: var(--text-dim);
}

.series-bar-track {
  flex: 1;
  height: 14px;
  background: var(--tile);
  border-radius: 4px;
  overflow: hidden;
}

.series-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s;
}

.series-bar-pct {
  min-width: 34px;
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* Stats footer */
.stats-footer {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Danger button */
.btn-danger {
  background: var(--wrong);
  color: #fff;
  font-weight: 600;
}

.btn-danger:hover {
  background: #a52a2a;
}

/* Reset confirmation overlay */
.reset-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.reset-dialog {
  background: var(--surface);
  border-radius: 12px;
  padding: 28px;
  max-width: 360px;
  text-align: center;
}

.reset-dialog p {
  margin-bottom: 20px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.reset-dialog-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* Disclaimer footer */
.disclaimer {
  margin-top: 32px;
  padding: 16px 0;
  font-size: 0.7rem;
  line-height: 1.5;
  color: var(--text-dim);
  text-align: center;
  border-top: 1px solid #1e1e3a;
}

.disclaimer a {
  color: var(--text-dim);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 500px) {
  .tile {
    font-size: 0.7rem;
    padding: 6px 4px;
    aspect-ratio: 2 / 1;
  }

  header h1 {
    font-size: 1.4rem;
  }
}