/* ===== CSS VARIABLES — THEMES ===== */
:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --surface2: #0f3460;
  --accent: #e94560;
  --accent2: #f5a623;
  --text: #eaeaea;
  --text-muted: #8a8aaa;
  --cell-up: #c0c0c0;
  --cell-border-light: #ffffff;
  --cell-border-dark: #7b7b7b;
  --cell-revealed: #bdbdbd;
  --cell-highlight: #a0d4ff;
  --counter-bg: #000;
  --counter-color: #ff2222;
  --radius: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --font-display: 'Bebas Neue', cursive;
  --font-mono: 'Share Tech Mono', monospace;
  --font-body: 'Inter', sans-serif;
}

[data-theme="classic"] {
  --bg: #808080;
  --surface: #c0c0c0;
  --surface2: #a0a0a0;
  --accent: #000080;
  --accent2: #800000;
  --text: #000;
  --text-muted: #444;
  --cell-up: #c0c0c0;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}

[data-theme="dark"] {
  --bg: #0d0d0d;
  --surface: #1a1a1a;
  --surface2: #252525;
  --accent: #00ff88;
  --accent2: #ff6b35;
  --text: #e0e0e0;
  --text-muted: #666;
  --cell-up: #333;
  --cell-border-light: #555;
  --cell-border-dark: #111;
  --cell-revealed: #222;
  --counter-color: #00ff88;
}

[data-theme="retro"] {
  --bg: #000;
  --surface: #001100;
  --surface2: #002200;
  --accent: #00ff00;
  --accent2: #ffff00;
  --text: #00ff00;
  --text-muted: #009900;
  --cell-up: #003300;
  --cell-border-light: #00aa00;
  --cell-border-dark: #001100;
  --cell-revealed: #001a00;
  --counter-bg: #000;
  --counter-color: #00ff00;
}

[data-theme="nature"] {
  --bg: #2d5016;
  --surface: #3a6b1e;
  --surface2: #4a8a2a;
  --accent: #f4c842;
  --accent2: #e8633a;
  --text: #f0ead6;
  --text-muted: #a8c070;
  --cell-up: #8ab050;
  --cell-border-light: #b8d870;
  --cell-border-dark: #4a7020;
  --cell-revealed: #7a9840;
  --counter-bg: #1a3008;
  --counter-color: #f4c842;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: background 0.3s, color 0.3s;
}

#app {
  width: 100%;
  max-width: 1000px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-bottom: 40px;
}

/* ===== HEADER ===== */
#header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 2px solid var(--accent);
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

#logo {
  font-family: var(--font-display);
  font-size: 28px;
  letter-spacing: 2px;
  color: var(--accent);
  text-shadow: 0 0 12px var(--accent);
}

#header-nav {
  display: flex;
  gap: 8px;
}

.nav-btn {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--text-muted);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}

.nav-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255,255,255,0.05);
}

/* ===== GAME ===== */
#game {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 0 10px;
}

/* ===== TOOLBAR ===== */
#toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 8px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.tool-group {
  display: flex;
  gap: 4px;
}

.tool-btn {
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-body);
  padding: 5px 10px;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--text-muted);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.tool-btn:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateY(-1px);
}

.tool-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.tool-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ===== TOP BAR ===== */
#top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 10px 16px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hud-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.hud-label {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.counter {
  background: var(--counter-bg, #000);
  color: var(--counter-color, #ff2222);
  font-family: var(--font-mono);
  font-size: 32px;
  padding: 4px 10px;
  min-width: 80px;
  text-align: center;
  border-radius: 4px;
  border: 2px inset #333;
  text-shadow: 0 0 8px currentColor;
  letter-spacing: 4px;
}

#center-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

#smiley {
  font-size: 32px;
  width: 52px;
  height: 52px;
  border: 3px outset var(--cell-border-light);
  background: var(--cell-up);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

#smiley:hover { transform: scale(1.1); }
#smiley:active { border-style: inset; transform: scale(0.95); }

#presets {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
}

.preset-btn {
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 3px 8px;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--text-muted);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.preset-btn:hover {
  background: var(--accent2);
  color: #fff;
  border-color: var(--accent2);
}

.preset-btn.selected {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ===== BOARD ===== */
#board-container {
  max-width: 95vw;
  max-height: 65vh;
  overflow: auto;
  border: 3px inset #555;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

#board {
  display: grid;
  transform-origin: top left;
}

.cell {
  width: 28px;
  height: 28px;
  background: var(--cell-up);
  border: 2px solid;
  border-color: var(--cell-border-light) var(--cell-border-dark) var(--cell-border-dark) var(--cell-border-light);
  box-sizing: border-box;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  font-family: var(--font-mono);
  font-size: 13px;
  user-select: none;
  cursor: pointer;
  transition: background 0.05s;
}

.cell:hover:not(.revealed) {
  background: color-mix(in srgb, var(--cell-up) 80%, var(--accent) 20%);
}

.cell.revealed {
  background: var(--cell-revealed);
  border: 0.5px solid var(--cell-border-dark);
  cursor: default;
}

.cell.highlighted {
  background: var(--cell-highlight);
  animation: pulse 0.3s ease infinite alternate;
}

@keyframes pulse {
  from { background: var(--cell-highlight); }
  to { background: color-mix(in srgb, var(--cell-highlight) 60%, white); }
}

.cell.flagged {
  animation: flagPop 0.15s ease;
}

@keyframes flagPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

.cell.losing-mine {
  background: #ff3333 !important;
  animation: boom 0.3s ease;
}

@keyframes boom {
  0% { transform: scale(1); }
  50% { transform: scale(1.4); background: #ffff00; }
  100% { transform: scale(1); }
}

.cell.undo-ghost {
  opacity: 0.5;
  border: 2px dashed var(--accent2);
}

/* Number colors */
.n1 { color: #1565c0; }
.n2 { color: #2e7d32; }
.n3 { color: #c62828; }
.n4 { color: #283593; }
.n5 { color: #6a1b1a; }
.n6 { color: #00695c; }
.n7 { color: #4a148c; }
.n8 { color: #212121; }

[data-theme="dark"] .n1 { color: #64b5f6; }
[data-theme="dark"] .n2 { color: #81c784; }
[data-theme="dark"] .n3 { color: #e57373; }
[data-theme="dark"] .n4 { color: #7986cb; }
[data-theme="dark"] .n5 { color: #ff8a65; }
[data-theme="dark"] .n6 { color: #4dd0e1; }
[data-theme="dark"] .n7 { color: #ce93d8; }
[data-theme="dark"] .n8 { color: #aaa; }

[data-theme="retro"] .n1,
[data-theme="retro"] .n2,
[data-theme="retro"] .n3,
[data-theme="retro"] .n4,
[data-theme="retro"] .n5,
[data-theme="retro"] .n6,
[data-theme="retro"] .n7,
[data-theme="retro"] .n8 { color: #00ff00; font-family: var(--font-mono); }

/* ===== STATUS BAR ===== */
#status-bar {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background: var(--surface);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ===== MODALS ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(4px);
  animation: fadeIn 0.15s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.hidden { display: none !important; }

.modal-content {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 24px;
  width: min(480px, 95vw);
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 0 40px rgba(0,0,0,0.6);
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--text-muted);
  padding-bottom: 12px;
}

.modal-header h2 {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 1px;
  color: var(--accent);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color 0.2s;
}

.modal-close:hover { color: var(--accent); }

fieldset {
  border: 1px solid var(--text-muted);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 12px;
}

legend {
  font-weight: 600;
  font-size: 13px;
  padding: 0 6px;
  color: var(--accent2);
}

.toggle-row, .radio-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  cursor: pointer;
  font-size: 14px;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  margin-top: 8px;
}

.slider-row input[type=range] { flex: 1; accent-color: var(--accent); }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  gap: 4px;
}

.form-grid input[type=number] {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--text-muted);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 14px;
  font-family: var(--font-mono);
  width: 100%;
}

/* Buttons */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 10px 20px;
  font-weight: 700;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
}

.btn-primary:hover { filter: brightness(1.15); transform: translateY(-1px); }

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--text-muted);
  border-radius: var(--radius);
  padding: 8px 16px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 13px;
  margin-top: 8px;
  width: 100%;
}

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

.btn-danger {
  background: transparent;
  color: #e05555;
  border: 1px solid #e05555;
  border-radius: var(--radius);
  padding: 7px 14px;
  font-weight: 600;
  cursor: pointer;
  font-size: 12px;
  margin-top: 12px;
  transition: all 0.2s;
}

.btn-danger:hover { background: #e05555; color: #fff; }

/* ===== WIN / LOSE MODAL ===== */
.win-content, .lose-content {
  text-align: center;
}

.win-emoji, .lose-emoji {
  font-size: 64px;
  animation: bounceIn 0.5s cubic-bezier(0.36,0.07,0.19,0.97);
  display: block;
  margin-bottom: 8px;
}

@keyframes bounceIn {
  0% { transform: scale(0); }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.win-content h2 {
  font-family: var(--font-display);
  font-size: 36px;
  color: #44cc66;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.lose-content h2 {
  font-family: var(--font-display);
  font-size: 36px;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

#winDetails, #loseDetails {
  background: var(--surface2);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  text-align: left;
}

.win-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== STATS ===== */
.stats-content { max-width: 520px; }

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 16px;
}

.stat-card {
  background: var(--surface2);
  border-radius: var(--radius);
  padding: 12px;
  text-align: center;
  border: 1px solid var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 28px;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stats-chart {
  width: 100%;
  height: 80px;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  margin-top: 12px;
  padding: 8px;
  background: var(--surface2);
  border-radius: var(--radius);
}

.bar-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  height: 100%;
  justify-content: flex-end;
}

.bar {
  width: 100%;
  border-radius: 3px 3px 0 0;
  transition: height 0.4s ease;
}

.bar.win-bar { background: #44cc66; }
.bar.lose-bar { background: var(--accent); }

.bar-label {
  font-size: 9px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ===== LEADERBOARD ===== */
#leaderboardFilters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.filter-btn {
  font-size: 12px;
  padding: 4px 10px;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--text-muted);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-btn.active, .filter-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

#leaderboardBody table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-family: var(--font-mono);
}

#leaderboardBody th {
  text-align: left;
  padding: 8px;
  font-size: 11px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

#leaderboardBody td {
  padding: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

#leaderboardBody tr:nth-child(1) td { color: #ffd700; font-weight: 700; }
#leaderboardBody tr:nth-child(2) td { color: #c0c0c0; }
#leaderboardBody tr:nth-child(3) td { color: #cd7f32; }

.rank-medal { font-size: 16px; }

/* ===== THEME PICKER ===== */
.theme-picker {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.theme-btn {
  font-size: 22px;
  width: 44px;
  height: 44px;
  border: 2px solid var(--text-muted);
  border-radius: 50%;
  cursor: pointer;
  background: var(--surface2);
  transition: all 0.2s;
}

.theme-btn:hover, .theme-btn.active {
  border-color: var(--accent);
  transform: scale(1.15);
  box-shadow: 0 0 10px var(--accent);
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--accent);
  border-radius: 24px;
  padding: 10px 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  z-index: 200;
  animation: toastIn 0.2s ease;
  white-space: nowrap;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ===== SCROLLBAR ===== */
#board-container::-webkit-scrollbar { width: 6px; height: 6px; }
#board-container::-webkit-scrollbar-track { background: var(--surface); }
#board-container::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  #logo { font-size: 20px; }
  .nav-btn { font-size: 11px; padding: 4px 8px; }
  #toolbar { gap: 4px; }
  .tool-btn { font-size: 10px; padding: 4px 7px; }
  .counter { font-size: 22px; min-width: 60px; }
  #smiley { font-size: 24px; width: 42px; height: 42px; }
  .stats-grid { grid-template-columns: 1fr; }
}

/* Win animation on cells */
@keyframes winPulse {
  0% { filter: brightness(1); }
  50% { filter: brightness(1.4) hue-rotate(30deg); }
  100% { filter: brightness(1); }
}

.cell.win-animate {
  animation: winPulse 0.4s ease;
}