:root {
  --bg: #050816;
  --bg-alt: #0b1021;
  --accent: #ffce48;
  --accent-soft: rgba(255, 206, 72, 0.12);
  --accent-strong: #ff9f1c;
  --text: #f8fafc;
  --muted: #9ca3af;
  --danger: #f97373;
  --success: #4ade80;
  --wall: #1f2937;
  --hazard: #dc2626;
  --bonus: #22c55e;
  --tile-border: rgba(148, 163, 184, 0.4);
  --radius-lg: 18px;
  --radius-md: 12px;
  --transition-fast: 150ms ease-out;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.9);
}

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

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #1e293b 0, #020617 40%);
  /* Prevent text selection during gameplay on mobile */
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

/* Allow text selection in modals and help text */
.modal,
.modal *,
.side-help {
  -webkit-user-select: text;
  user-select: text;
}

.app {
  width: 100%;
  max-width: 900px;
  min-height: 100vh;
  min-height: -webkit-fill-available; /* iOS Safari fix */
  margin: 0 auto;
  padding: 12px 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top));
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  padding-left: max(12px, env(safe-area-inset-left));
  padding-right: max(12px, env(safe-area-inset-right));
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 1.1rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #020617;
  box-shadow: 0 12px 30px rgba(248, 250, 252, 0.18);
}

.header-right {
  display: flex;
  gap: 8px;
}

.icon-button {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.85);
  color: var(--text);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast), border-color var(--transition-fast);
  /* Better touch feedback */
  -webkit-tap-highlight-color: rgba(255, 206, 72, 0.3);
  touch-action: manipulation;
}

.icon-button:hover {
  background: rgba(30, 64, 175, 0.9);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(30, 64, 175, 0.45);
}

.icon-button:active {
  transform: translateY(0);
  box-shadow: none;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: stretch;
  gap: 16px;
}

.stats-panel {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 16px;
  background: radial-gradient(circle at top left, #020617, #020617 55%, #020617);
  border: 1px solid rgba(30, 64, 175, 0.7);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.9);
}

.stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.stat-label {
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.stat-value {
  font-size: 0.9rem;
  font-weight: 600;
}

.mode-panel {
  margin-top: 6px;
  padding: 8px 10px 10px;
  border-radius: 16px;
  background: radial-gradient(circle at top left, #020617, #020617 55%, #020617);
  border: 1px solid rgba(30, 64, 175, 0.7);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.9);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mode-toggle {
  display: inline-flex;
  padding: 3px;
  border-radius: 999px;
  background: radial-gradient(circle at 20% 0, #020617, #020617);
  border: 1px solid rgba(148, 163, 184, 0.6);
}

.pill-button {
  border-radius: 999px;
  border: 0;
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast),
    box-shadow var(--transition-fast), transform var(--transition-fast);
}

.pill-button--active {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #020617;
  box-shadow: 0 8px 18px rgba(250, 204, 21, 0.35);
  transform: translateY(-1px);
}

.mode-extra {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}

.difficulty-label {
  font-size: 0.7rem;
  color: var(--muted);
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  line-height: 1.2;
}

.difficulty-label select {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  padding: 4px 8px;
  font-size: 0.78rem;
  outline: none;
  margin-top: 2px;
  min-width: 0;
  width: 100%;
}

.difficulty-label select:focus {
  border-color: var(--accent);
}

.secondary-button--compact {
  padding-inline: 10px;
  padding-block: 5px;
  font-size: 0.75rem;
  width: 100%;
}

.streak-pill {
  margin-top: 4px;
  padding: 5px 8px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.6);
}

.is-hidden {
  display: none !important;
}

.board-wrapper {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px 0;
}

.board {
  width: 100%;
  max-width: 560px;
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at top, #020617, #020617 40%, #000 85%);
  border-radius: var(--radius-lg);
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(6, 1fr);
  gap: 4px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.7);
  /* Prevent accidental scrolling on mobile */
  touch-action: pan-x pan-y;
}

.side-panel {
  width: 210px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: stretch;
  padding-top: 160px;
  box-sizing: border-box;
}

.cell {
  border-radius: 12px;
  background: radial-gradient(circle at 20% 0, #1e293b, #020617);
  border: 1px solid var(--tile-border);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--muted);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    border-color var(--transition-fast), background var(--transition-fast),
    opacity var(--transition-fast);
}

.cell-wall {
  background: radial-gradient(circle at top, #020617, #020617 55%, #0b1120);
  border-color: #000;
}

.cell-hazard {
  background: radial-gradient(circle at 30% 0, #dc2626, #991b1b);
  border-color: rgba(220, 38, 38, 0.85);
  color: #fef2f2;
  font-weight: 700;
}

.cell-bonus::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(34, 197, 94, 0.9), transparent);
  opacity: 0.6;
}

.cell-slow {
  background: radial-gradient(circle at 30% 0, #3b82f6, #1e40af);
  border-color: rgba(59, 130, 246, 0.85);
  color: #dbeafe;
  font-weight: 700;
}

.cell-teleport {
  background: radial-gradient(circle at 30% 0, #a855f7, #7e22ce);
  border-color: rgba(168, 85, 247, 0.85);
  color: #f3e8ff;
  font-weight: 700;
}

.cell-key {
  background: radial-gradient(circle at 30% 0, #fbbf24, #d97706);
  border-color: rgba(251, 191, 36, 0.85);
  color: #020617;
  font-weight: 700;
}

.cell-gate {
  background: radial-gradient(circle at top, #374151, #1f2937);
  border-color: rgba(107, 114, 128, 0.85);
  color: #d1d5db;
  font-weight: 700;
}

.cell-gate.locked {
  opacity: 0.5;
}

.cell-start,
.cell-goal {
  font-weight: 700;
  color: #020617;
}

.cell-start {
  background: radial-gradient(circle at 30% 0, #22c55e, #16a34a);
  border-color: rgba(34, 197, 94, 0.85);
}

.cell-goal {
  background: radial-gradient(circle at 30% 0, var(--accent), var(--accent-strong));
  border-color: rgba(250, 204, 21, 0.9);
}

.cell-bonus {
  position: relative;
}

.cell-bonus::before {
  content: "+";
  position: relative;
  z-index: 2;
  font-weight: 700;
  color: #022c22;
}

.player {
  width: 72%;
  height: 72%;
  border-radius: 40%;
  background: radial-gradient(circle at 20% 10%, #f9fafb, #38bdf8 60%, #0ea5e9);
  border: 2px solid rgba(15, 23, 42, 0.85);
  box-shadow: 0 6px 12px rgba(15, 23, 42, 0.9);
  transform: translate3d(0, 0, 0);
  transition: transform 110ms ease-out;
}

.player-trail {
  position: absolute;
  inset: 10%;
  border-radius: inherit;
  background: radial-gradient(circle at center, rgba(56, 189, 248, 0.85), transparent);
  opacity: 0.16;
}

.cell-visited:not(.cell-start):not(.cell-goal):not(.cell-wall) {
  opacity: 0.9;
  border-color: rgba(148, 163, 184, 0.9);
}

.cell.bump {
  animation: bump 160ms ease-out;
}

.cell.goal-flash {
  animation: goal-flash 600ms ease-out;
}

@keyframes bump {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
  100% {
    transform: translateY(0);
  }
}

@keyframes goal-flash {
  0% {
    box-shadow: 0 0 0 rgba(250, 204, 21, 0);
  }
  50% {
    box-shadow: 0 0 40px rgba(250, 204, 21, 0.8);
  }
  100% {
    box-shadow: 0 0 0 rgba(250, 204, 21, 0);
  }
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 2px;
  padding: 8px 10px 10px;
  border-radius: 16px;
  background: radial-gradient(circle at top left, #020617, #020617 55%, #020617);
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.7);
}

.status-message {
  min-height: 24px;
  font-size: 0.86rem;
  color: var(--muted);
}

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

.status-message--warning {
  color: var(--danger);
}

.recap-panel {
  padding: 8px 10px;
  border-radius: 12px;
  background: radial-gradient(circle at top left, #020617, #020617 55%, #020617);
  border: 1px solid rgba(148, 163, 184, 0.5);
  margin-bottom: 6px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

.recap-panel.recap-visible {
  opacity: 1;
  transform: translateY(0);
}

.recap-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.recap-rank {
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  padding: 4px 8px;
  border-radius: 8px;
  margin-bottom: 2px;
}

.recap-rank.rank-s {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #020617;
}

.recap-rank.rank-a {
  background: linear-gradient(135deg, #34d399, #10b981);
  color: #020617;
}

.recap-rank.rank-b {
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  color: #020617;
}

.recap-rank.rank-c {
  background: linear-gradient(135deg, #94a3b8, #64748b);
  color: #f8fafc;
}

.recap-stats {
  font-size: 0.75rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.primary-button,
.secondary-button {
  flex: 1 1 calc(50% - 4px);
  border-radius: 999px;
  border: 0;
  padding: 9px 12px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast), opacity var(--transition-fast);
  white-space: nowrap;
  /* Better touch feedback */
  -webkit-tap-highlight-color: rgba(255, 206, 72, 0.3);
  touch-action: manipulation;
}

#timeAttackButton {
  flex-basis: 100%;
}

#timeAttackButton.active {
  background: rgba(255, 206, 72, 0.2);
  border-color: var(--accent);
  color: var(--accent);
}

#timeAttackButton:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#timeAttackButton:disabled:hover {
  background: rgba(15, 23, 42, 0.85);
}

.primary-button {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #020617;
  box-shadow: 0 10px 22px rgba(250, 204, 21, 0.35);
}

.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(250, 204, 21, 0.4);
}

.primary-button:active {
  transform: translateY(0);
  box-shadow: none;
}

.secondary-button {
  background: rgba(15, 23, 42, 0.85);
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.7);
}

.secondary-button:hover {
  background: rgba(30, 64, 175, 0.9);
}

.secondary-button:active {
  opacity: 0.9;
}

.on-screen-controls {
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.on-screen-controls .row {
  display: flex;
  gap: 6px;
}

.dpad-button {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.65);
  background: radial-gradient(circle at 20% 0, #111827, #020617);
  color: var(--text);
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.9);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    border-color var(--transition-fast), background var(--transition-fast);
  /* Better touch feedback */
  -webkit-tap-highlight-color: rgba(255, 206, 72, 0.3);
  touch-action: manipulation;
}

.dpad-button:hover {
  border-color: var(--accent);
  background: radial-gradient(circle at 20% 0, #111827, #111827);
}

.dpad-button:active {
  transform: translateY(1px);
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.9);
}

.app-footer {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

.side-help {
  margin: 4px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.modal {
  border: 0;
  border-radius: var(--radius-lg);
  padding: 18px 18px 16px;
  max-width: 420px;
  width: calc(100% - 32px);
  background: radial-gradient(circle at top, #0b1120, #020617);
  color: var(--text);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.95);
}

.modal::backdrop {
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
}

.modal h2 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.modal ol {
  padding-left: 20px;
  font-size: 0.87rem;
  color: var(--muted);
}

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

.modal .primary-button {
  margin-top: 10px;
  width: 100%;
}

.tile-demo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 0.8rem;
  border-radius: 20%;
  font-weight: 700;
}

.tile-demo.start {
  background: radial-gradient(circle at 30% 0, #22c55e, #16a34a);
  color: #020617;
}

.tile-demo.goal {
  background: radial-gradient(circle at 30% 0, var(--accent), var(--accent-strong));
  color: #020617;
}

.tile-demo.bonus {
  background: radial-gradient(circle at 30% 0, #22c55e, #16a34a);
  color: #020617;
}

.tile-demo.hazard {
  background: radial-gradient(circle at 30% 0, #dc2626, #991b1b);
  color: #fef2f2;
}

.tile-demo.slow {
  background: radial-gradient(circle at 30% 0, #3b82f6, #1e40af);
  color: #dbeafe;
}

.tile-demo.teleport {
  background: radial-gradient(circle at 30% 0, #a855f7, #7e22ce);
  color: #f3e8ff;
}

.tile-demo.key {
  background: radial-gradient(circle at 30% 0, #fbbf24, #d97706);
  color: #020617;
}

.tile-demo.gate {
  background: radial-gradient(circle at top, #374151, #1f2937);
  color: #d1d5db;
}

/* Mobile-first responsive design */
@media (max-width: 768px) {
  .app-main {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .board-wrapper {
    order: 1;
    width: 100%;
    padding: 0;
  }

  .board {
    max-width: 100%;
    width: 100%;
    padding: 6px;
    gap: 2px;
  }

  .side-panel {
    order: 2;
    width: 100%;
    padding-top: 0;
    gap: 8px;
  }

  .stats-panel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 10px;
  }

  .stat {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 4px;
  }

  .stat-label {
    font-size: 0.7rem;
  }

  .stat-value {
    font-size: 1rem;
  }

  .controls {
    padding: 10px;
  }

  .button-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
    padding: 12px;
    font-size: 0.9rem;
    min-height: 44px; /* iOS touch target minimum */
  }

  #timeAttackButton {
    grid-column: 1 / -1;
  }

  .on-screen-controls {
    margin-top: 12px;
    padding: 8px 0;
  }

  /* Hide on-screen controls on larger mobile devices in landscape */
  @media (max-width: 768px) and (orientation: landscape) and (min-height: 400px) {
    .on-screen-controls {
      display: none;
    }
  }

  .dpad-button {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    min-height: 44px;
    min-width: 44px;
  }

  .icon-button {
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }

  .logo {
    font-size: 1rem;
    padding: 8px 12px;
  }

  .header-right {
    gap: 6px;
  }

  .modal {
    max-width: calc(100% - 24px);
    padding: 16px;
    margin: 12px;
  }

  .modal h2 {
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .app {
    padding: 6px 6px 12px;
    padding-top: max(6px, env(safe-area-inset-top));
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    padding-left: max(6px, env(safe-area-inset-left));
    padding-right: max(6px, env(safe-area-inset-right));
  }

  .app-header {
    margin-bottom: 8px;
  }

  .app-main {
    gap: 10px;
  }

  .board {
    padding: 4px;
    gap: 2px;
    border-radius: 12px;
  }

  .cell {
    border-radius: 8px;
    font-size: 0.85rem;
  }

  .stats-panel {
    grid-template-columns: repeat(2, 1fr);
    padding: 8px;
    gap: 6px;
  }

  .stat-label {
    font-size: 0.65rem;
  }

  .stat-value {
    font-size: 0.95rem;
  }

  .controls {
    padding: 8px;
  }

  .button-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .primary-button,
  .secondary-button {
    padding: 10px;
    font-size: 0.85rem;
  }

  .mode-selector {
    padding: 4px;
    gap: 6px;
  }

  .hint-button {
    padding: 6px 10px;
    font-size: 1.1rem;
    min-width: 44px;
    min-height: 44px;
  }

  .hint-count {
    font-size: 0.8rem;
  }

  .status-message {
    font-size: 0.8rem;
    min-height: 20px;
  }

  .side-help {
    font-size: 0.7rem;
    margin-top: 6px;
  }

  .dpad-button {
    width: 56px;
    height: 56px;
    font-size: 1.4rem;
  }

  .logo {
    font-size: 0.95rem;
    padding: 6px 10px;
  }

  .icon-button {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .recap-panel {
    padding: 6px 8px;
  }

  .recap-rank {
    font-size: 0.85rem;
    padding: 3px 6px;
  }

  .recap-stats {
    font-size: 0.7rem;
  }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
  .app-main {
    flex-direction: row;
    align-items: flex-start;
  }

  .board-wrapper {
    flex: 0 0 auto;
    width: 50%;
    max-width: 400px;
  }

  .side-panel {
    width: 50%;
    flex: 1 1 auto;
    padding-top: 0;
  }

  .stats-panel {
    grid-template-columns: repeat(3, 1fr);
  }

  .on-screen-controls {
    display: none;
  }
}

/* Very small screens (iPhone SE, etc.) */
@media (max-width: 375px) {
  .board {
    padding: 3px;
    gap: 1px;
  }

  .cell {
    border-radius: 6px;
    font-size: 0.75rem;
  }

  .stats-panel {
    grid-template-columns: repeat(2, 1fr);
    padding: 6px;
  }

  .stat-label {
    font-size: 0.6rem;
  }

  .stat-value {
    font-size: 0.85rem;
  }

  .dpad-button {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
  }

  .primary-button,
  .secondary-button {
    padding: 8px;
    font-size: 0.8rem;
  }
}

/* ========== NEW FEATURES STYLES ========== */

/* Mode Selector */
.mode-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  padding: 6px;
  background: rgba(15, 23, 42, 0.5);
  border-radius: 8px;
}

.hint-button {
  background: rgba(255, 206, 72, 0.2);
  border: 1px solid rgba(255, 206, 72, 0.4);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hint-button:hover {
  background: rgba(255, 206, 72, 0.3);
  transform: scale(1.05);
}

.hint-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.hint-count {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

/* Stats Dialog */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  background: rgba(15, 23, 42, 0.5);
  border-radius: 8px;
}

.stat-item .stat-label {
  font-size: 0.75rem;
  color: var(--muted);
}

.stat-item .stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

/* Achievements Dialog */
.achievements-list {
  max-height: 400px;
  overflow-y: auto;
  margin: 16px 0;
}

.achievement-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  margin-bottom: 8px;
  background: rgba(15, 23, 42, 0.5);
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: all var(--transition-fast);
}

.achievement-item.unlocked {
  border-color: var(--accent);
  background: rgba(255, 206, 72, 0.1);
}

.achievement-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.achievement-info {
  flex: 1;
}

.achievement-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.achievement-desc {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.achievement-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
}

.progress-bar {
  flex: 1;
  height: 4px;
  background: rgba(15, 23, 42, 0.8);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 0.3s ease;
}

/* Level Select Grid */
.level-select-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  gap: 8px;
  max-height: 400px;
  overflow-y: auto;
  margin: 16px 0;
  padding: 8px;
  background: rgba(15, 23, 42, 0.3);
  border-radius: 8px;
}

.level-select-item {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.level-select-item:hover {
  background: rgba(15, 23, 42, 0.8);
  transform: scale(1.05);
}

.level-select-item.completed {
  border-color: var(--success);
  background: rgba(34, 197, 94, 0.1);
}

.level-select-item.current {
  border-color: var(--accent);
  background: rgba(255, 206, 72, 0.2);
  box-shadow: 0 0 12px rgba(255, 206, 72, 0.4);
}

.level-number {
  font-weight: 700;
  font-size: 1.1rem;
}

.level-record {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  margin-top: 4px;
  font-size: 0.7rem;
}

.record-rank {
  font-weight: 600;
}

.record-moves {
  color: var(--muted);
  font-size: 0.65rem;
}

/* Achievement Notification */
.achievement-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: radial-gradient(circle at top, #0b1120, #020617);
  border: 2px solid var(--accent);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  z-index: 10000;
  transform: translateX(400px);
  opacity: 0;
  transition: all 0.3s ease;
}

.achievement-notification.show {
  transform: translateX(0);
  opacity: 1;
}

.achievement-badge {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 8px;
}

.achievement-text {
  text-align: center;
  font-size: 0.9rem;
}

/* Milestone Notification */
.milestone-notification {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: radial-gradient(circle at top, #0b1120, #020617);
  border: 3px solid var(--accent);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 12px 40px rgba(255, 206, 72, 0.4);
  z-index: 10001;
  opacity: 0;
  transition: all 0.3s ease;
}

.milestone-notification.show {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.milestone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.milestone-icon {
  font-size: 3rem;
}

.milestone-text {
  text-align: center;
  font-size: 1.1rem;
}

/* Particle Effects */
.particle {
  position: fixed;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
}

/* Hint Highlight */
.hint-highlight {
  animation: hint-pulse 2s ease-in-out;
  box-shadow: 0 0 20px rgba(255, 206, 72, 0.8) !important;
}

@keyframes hint-pulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(255, 206, 72, 0.8);
  }
  50% {
    box-shadow: 0 0 30px rgba(255, 206, 72, 1);
  }
}

/* Cell Bounce Animation */
.cell-bounce {
  animation: cell-bounce 0.3s ease;
}

@keyframes cell-bounce {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

/* Responsive adjustments for modals and dialogs */
@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .level-select-grid {
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 6px;
  }
  
  .level-select-item {
    min-height: 60px;
    padding: 6px;
  }
  
  .achievement-item {
    padding: 10px;
    gap: 10px;
  }
  
  .achievement-notification {
    right: 10px;
    top: 10px;
    padding: 12px;
    max-width: calc(100% - 20px);
  }
  
  .milestone-notification {
    padding: 16px;
    max-width: calc(100% - 40px);
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  
  .level-select-grid {
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    gap: 4px;
  }
  
  .level-select-item {
    min-height: 50px;
    padding: 4px;
  }
  
  .level-number {
    font-size: 0.95rem;
  }
  
  .achievement-item {
    padding: 8px;
    gap: 8px;
  }
  
  .achievement-icon {
    font-size: 1.2rem;
  }
  
  .achievement-name {
    font-size: 0.9rem;
  }
  
  .achievement-desc {
    font-size: 0.75rem;
  }
  
  .achievement-notification {
    right: 8px;
    top: 8px;
    padding: 10px;
    font-size: 0.85rem;
  }
  
  .milestone-notification {
    padding: 12px;
    font-size: 0.9rem;
  }
  
  .milestone-icon {
    font-size: 2rem;
  }
}