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

:root {
  --primary: #ff6b35;
  --accent: #f7c948;
  --dark: #1a1a2e;
  --darker: #0f0f1a;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 107, 53, 0.15);
  --card-hover: rgba(255, 107, 53, 0.08);
  --light: #f0f0f0;
  --green: #4caf50;
  --red: #e74c3c;
  --purple: #9b59b6;
  --cyan: #00bcd4;
  --mine-border: rgba(155, 89, 182, 0.3);
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--darker);
  color: var(--light);
  overflow-x: hidden;
  min-height: 100vh;
  user-select: none;
  -webkit-user-select: none;
}

h2, h3, h4 { font-family: 'Bangers', cursive; letter-spacing: 1.5px; }

.hidden { display: none !important; }

/* ===== TOP BAR ===== */
.top-bar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 48px;
  background: rgba(15, 15, 26, 0.95);
  border-bottom: 1px solid var(--mine-border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1rem; z-index: 100;
  backdrop-filter: blur(10px);
}
.back-link {
  color: var(--purple); text-decoration: none;
  font-weight: 600; font-size: 0.85rem;
}
.back-link:hover { text-decoration: underline; }

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

.mines-display, .timer-display {
  font-size: 0.9rem; font-weight: 700;
  padding: 2px 12px; border-radius: 20px;
  font-family: 'JetBrains Mono', monospace;
}
.mines-display {
  background: rgba(231, 76, 60, 0.15);
  color: var(--red); border: 1px solid rgba(231, 76, 60, 0.3);
}
.timer-display {
  background: rgba(155, 89, 182, 0.15);
  color: var(--purple); border: 1px solid var(--mine-border);
}
.difficulty-label {
  color: var(--purple); font-weight: 700; font-size: 0.85rem;
}

/* ===== LAYOUT ===== */
.game-layout {
  display: grid;
  grid-template-columns: 220px 1fr 240px;
  min-height: 100vh;
  padding-top: 48px;
}

/* ===== SIDE PANELS ===== */
.side-panel {
  background: rgba(15, 15, 26, 0.92);
  display: flex; flex-direction: column;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 1rem;
}
.left-panel { border-right: 1px solid var(--mine-border); }
.right-panel { border-left: 1px solid var(--mine-border); }

.panel-title {
  font-size: 1rem; color: var(--purple);
  margin-bottom: 0.8rem;
}

.diff-buttons {
  display: flex; flex-direction: column; gap: 0.4rem;
  margin-bottom: 0.8rem;
}
.diff-btn {
  padding: 0.6rem 0.8rem;
  background: var(--card); border: 1px solid var(--mine-border);
  border-radius: 10px; cursor: pointer;
  transition: all 0.15s; text-align: left;
  color: var(--light);
}
.diff-btn:hover {
  background: var(--card-hover); border-color: var(--purple);
}
.diff-btn.active {
  background: rgba(155, 89, 182, 0.12);
  border-color: var(--purple);
  box-shadow: 0 0 10px rgba(155, 89, 182, 0.15);
}
.diff-name { font-weight: 700; font-size: 0.85rem; display: block; }
.diff-info { font-size: 0.7rem; color: #888; }

.new-game-btn {
  width: 100%; padding: 0.6rem;
  background: linear-gradient(135deg, var(--purple), #8e44ad);
  border: none; border-radius: 10px;
  color: white; font-family: 'Bangers', cursive;
  font-size: 1rem; letter-spacing: 1px;
  cursor: pointer; transition: all 0.15s;
  margin-bottom: 1rem;
}
.new-game-btn:hover { filter: brightness(1.15); transform: scale(1.02); }

.controls-info {
  margin-bottom: 1rem;
  font-size: 0.75rem; color: #888; line-height: 1.8;
}
.controls-info h4 { font-size: 0.85rem; color: var(--purple); margin-bottom: 0.3rem; }

.stats-box {
  background: var(--card); border: 1px solid var(--mine-border);
  border-radius: 10px; padding: 0.8rem;
}
.stats-box h4 { font-size: 0.85rem; color: var(--purple); margin-bottom: 0.5rem; }
.stat-row {
  display: flex; justify-content: space-between;
  padding: 0.2rem 0; font-size: 0.75rem;
}
.stat-row span { color: #888; }
.stat-row strong { color: var(--light); font-family: 'JetBrains Mono', monospace; }

/* ===== GAME AREA ===== */
.game-area {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: var(--darker);
  position: relative;
  min-height: calc(100vh - 48px);
  padding: 1rem;
}

.game-status {
  display: flex; align-items: center; gap: 0.5rem;
  margin-bottom: 0.8rem;
  font-size: 1rem; color: #888;
}
#statusEmoji { font-size: 1.5rem; }

.board-wrapper {
  display: flex; align-items: center; justify-content: center;
  overflow: auto;
  max-width: 100%;
}

.board {
  display: grid;
  gap: 1px;
  background: rgba(155, 89, 182, 0.1);
  border: 2px solid var(--mine-border);
  border-radius: 6px;
  padding: 2px;
}

/* ===== CELLS ===== */
.cell {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 900;
  border-radius: 3px;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
  font-family: 'JetBrains Mono', monospace;
}

.cell.unrevealed {
  background: linear-gradient(145deg, rgba(168, 100, 197, 0.42), rgba(115, 62, 146, 0.42));
  border: 1px solid rgba(187, 121, 214, 0.55);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 -1px 0 rgba(0, 0, 0, 0.3),
    0 1px 2px rgba(0, 0, 0, 0.25);
}
.cell.unrevealed:hover {
  background: linear-gradient(145deg, rgba(180, 112, 210, 0.5), rgba(127, 70, 162, 0.5));
  border-color: rgba(213, 145, 242, 0.72);
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    inset 0 -1px 0 rgba(0, 0, 0, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.35);
}

.cell.unrevealed:active {
  transform: translateY(0);
  background: linear-gradient(145deg, rgba(127, 70, 162, 0.48), rgba(103, 55, 133, 0.48));
  box-shadow:
    inset 0 2px 3px rgba(0, 0, 0, 0.35),
    0 0 0 rgba(0, 0, 0, 0);
}

.cell.revealed {
  background: linear-gradient(180deg, rgba(224, 227, 239, 0.18), rgba(190, 194, 209, 0.1));
  border: 1px solid rgba(216, 220, 236, 0.24);
  box-shadow:
    inset 0 1px 2px rgba(0, 0, 0, 0.35),
    inset 0 -1px 0 rgba(255, 255, 255, 0.04);
  cursor: default;
}

.cell.flagged {
  background: linear-gradient(180deg, rgba(231, 76, 60, 0.3), rgba(195, 57, 43, 0.26));
  border: 1px solid rgba(243, 120, 108, 0.75);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.cell.mine-hit {
  background: rgba(231, 76, 60, 0.3);
  border: 1px solid var(--red);
}

.cell.mine-show {
  background: rgba(231, 76, 60, 0.1);
}

/* Number colors */
.cell.n1 { color: #52beff; }
.cell.n2 { color: #6be87d; }
.cell.n3 { color: #ff6f61; }
.cell.n4 { color: #8fb3ff; }
.cell.n5 { color: #ff8a7a; }
.cell.n6 { color: #53e0f3; }
.cell.n7 { color: #e6e7f1; }
.cell.n8 { color: #cfd2e6; }

/* ===== OVERLAYS ===== */
.win-overlay, .lose-overlay {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(10, 10, 20, 0.7);
  z-index: 10;
  backdrop-filter: blur(3px);
}

.win-box, .lose-box {
  background: rgba(26, 26, 46, 0.95);
  border: 1px solid var(--mine-border);
  border-radius: 16px;
  padding: 2rem 2.5rem;
  text-align: center;
  max-width: 400px;
}
.win-box h2 { font-size: 1.8rem; color: var(--green); margin-bottom: 0.5rem; }
.lose-box h2 { font-size: 1.8rem; color: var(--red); margin-bottom: 0.5rem; }
.win-box p, .lose-box p { color: #aaa; font-size: 0.9rem; margin-bottom: 1rem; }

.win-stats { display: flex; gap: 1rem; justify-content: center; margin-bottom: 1rem; }
.win-stat {
  background: var(--card); border: 1px solid var(--mine-border);
  border-radius: 10px; padding: 0.5rem 1rem;
  text-align: center;
}
.win-stat span { display: block; font-size: 0.7rem; color: #888; }
.win-stat strong {
  display: block; font-family: 'Bangers', cursive;
  font-size: 1.3rem; color: var(--accent);
}

.win-submit { display: flex; gap: 0.5rem; margin-bottom: 0.8rem; }
.win-input {
  flex: 1; padding: 0.6rem 0.8rem;
  background: var(--card); border: 1px solid var(--mine-border);
  border-radius: 8px; color: var(--light);
  font-size: 0.85rem; outline: none;
}
.win-input:focus { border-color: var(--purple); }

.submit-btn {
  padding: 0.6rem 1.2rem;
  background: var(--purple); border: none;
  border-radius: 8px; color: white;
  font-weight: 700; font-size: 0.85rem;
  cursor: pointer; transition: all 0.15s;
}
.submit-btn:hover { filter: brightness(1.15); }

.submit-status {
  font-size: 0.8rem; padding: 0.4rem;
  border-radius: 6px; margin-bottom: 0.8rem;
}
.submit-status.success { background: rgba(76,175,80,0.15); color: var(--green); }
.submit-status.error { background: rgba(231,76,60,0.15); color: var(--red); }

.retry-btn {
  padding: 0.6rem 1.5rem;
  background: var(--card); border: 1px solid var(--mine-border);
  border-radius: 8px; color: var(--light);
  font-weight: 700; cursor: pointer; transition: all 0.15s;
}
.retry-btn:hover { background: var(--card-hover); border-color: var(--purple); }

/* ===== LEADERBOARD ===== */
.lb-diff-tabs {
  display: flex; gap: 0.3rem; margin-bottom: 0.8rem;
}
.lb-tab {
  flex: 1; padding: 0.4rem;
  background: var(--card); border: 1px solid var(--mine-border);
  color: #888; font-size: 0.75rem; font-weight: 700;
  border-radius: 6px; cursor: pointer; transition: all 0.15s;
}
.lb-tab.active {
  background: rgba(155, 89, 182, 0.15);
  color: var(--purple); border-color: var(--purple);
}
.lb-tab:hover { color: var(--light); }

.leaderboard-list { margin-bottom: 0.5rem; min-height: 60px; }
.lb-loading { color: #555; font-size: 0.8rem; text-align: center; padding: 1rem; }

.lb-entry {
  display: flex; align-items: center; gap: 0.4rem;
  padding: 0.35rem 0.4rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  font-size: 0.75rem;
}
.lb-rank {
  width: 22px; text-align: center; font-weight: 900;
  color: var(--accent); font-family: 'Bangers', cursive;
  font-size: 0.9rem;
}
.lb-rank.gold { color: #ffd700; }
.lb-rank.silver { color: #c0c0c0; }
.lb-rank.bronze { color: #cd7f32; }

.lb-name { flex: 1; font-weight: 700; color: var(--light); overflow: hidden; text-overflow: ellipsis; }
.lb-time {
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent); font-weight: 700; font-size: 0.72rem;
}

.refresh-btn {
  width: 100%; padding: 0.45rem;
  background: var(--card); border: 1px solid var(--mine-border);
  border-radius: 8px; color: #888;
  font-weight: 700; font-size: 0.75rem;
  cursor: pointer; transition: all 0.15s;
}
.refresh-btn:hover { background: var(--card-hover); color: var(--light); }

/* ===== MOBILE NAV ===== */
.mobile-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  background: rgba(15, 15, 26, 0.98);
  border-top: 1px solid var(--mine-border);
  z-index: 100; padding: 0.3rem;
  justify-content: center; gap: 0.5rem;
}
.mobile-nav-btn {
  flex: 1; max-width: 100px;
  padding: 0.5rem; background: none; border: none;
  color: #888; font-size: 1.2rem; cursor: pointer;
  border-radius: 8px; transition: all 0.15s;
}
.mobile-nav-btn.active {
  background: rgba(155, 89, 182, 0.1);
  color: var(--purple);
}

@media (max-width: 900px) {
  .game-layout { grid-template-columns: 1fr; }
  .side-panel {
    display: none;
    position: fixed; top: 48px; bottom: 44px;
    width: 100%; z-index: 50;
    max-height: none;
    background: rgba(15, 15, 26, 0.98);
  }
  .left-panel { left: 0; border-right: none; }
  .right-panel { right: 0; border-left: none; }

  .side-panel.mobile-show { display: flex; }
  .mobile-nav { display: flex; }

  .game-area { min-height: auto; padding-bottom: 44px; }
}

@media (max-width: 500px) {
  .cell { width: 26px; height: 26px; font-size: 0.72rem; }
  .top-bar { padding: 0 0.5rem; }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(155, 89, 182, 0.2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(155, 89, 182, 0.4); }