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

body {
  font-family: 'Nunito', sans-serif;
  background: #1a1a2e;
  background-image: radial-gradient(circle at 30% 70%, #16213e 0%, #1a1a2e 60%);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  color: #fff;
  user-select: none;
  overflow-x: hidden;
}

/* ===== TOP BAR ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: linear-gradient(135deg, #ff6b35, #e85d2a);
  color: #fff;
  font-family: 'Nunito', sans-serif;
  flex-shrink: 0;
}

.btn-back {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  background: rgba(255,255,255,0.2);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  transition: background 0.2s;
  white-space: nowrap;
}
.btn-back:hover { background: rgba(255,255,255,0.35); }

.game-title {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.stats {
  display: flex;
  gap: 0.8rem;
  font-size: 0.9rem;
  font-weight: 700;
  opacity: 0.95;
  white-space: nowrap;
}

/* ===== CONTROLS BAR ===== */
.controls-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0.5rem 1rem;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(4px);
  flex-wrap: wrap;
  flex-shrink: 0;
}

.difficulty-selector {
  display: flex;
  gap: 0.3rem;
}

.diff-btn {
  padding: 0.3rem 0.8rem;
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  background: transparent;
  color: #fff;
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}
.diff-btn:hover { background: rgba(255,255,255,0.15); }
.diff-btn.active {
  background: #e94560;
  border-color: #e94560;
}

.control-buttons {
  display: flex;
  gap: 0.4rem;
}

/* ===== BUTTONS ===== */
.btn {
  padding: 0.35rem 1rem;
  border: none;
  border-radius: 999px;
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:active { transform: scale(0.96); }

.btn-new {
  background: #e94560;
  color: #fff;
}
.btn-new:hover { opacity: 0.88; }

.btn-flag {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 2px solid rgba(255,255,255,0.25);
}
.btn-flag.active {
  background: #f0a500;
  border-color: #f0a500;
  color: #1a1a2e;
}

.btn-orange { background: #e94560; color: #fff; padding: 0.5rem 1.5rem; font-size: 1rem; }
.btn-orange:hover { opacity: 0.88; }

/* ===== GAME CONTAINER ===== */
.game-container {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 0.8rem;
  overflow: auto;
}

.board-wrapper {
  display: inline-block;
}

/* ===== BOARD ===== */
.board {
  display: grid;
  gap: 1px;
  background: #999;
  border: 3px solid #888;
  border-radius: 4px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

/* ===== CELLS ===== */
.cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  cursor: pointer;
  transition: background 0.1s;
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.cell.unrevealed {
  background: #c0c0c0;
  border-top: 2px solid #fff;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #808080;
  border-right: 2px solid #808080;
}
.cell.unrevealed:hover {
  background: #d0d0d0;
}
.cell.unrevealed:active {
  background: #b0b0b0;
  border: 1px solid #999;
}

.cell.revealed {
  background: #e0e0e0;
  border: 1px solid #bbb;
}

.cell.flagged {
  background: #c0c0c0;
  border-top: 2px solid #fff;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #808080;
  border-right: 2px solid #808080;
}

.cell.mine-hit {
  background: #ff3333;
  border: 1px solid #cc0000;
}

.cell.mine-shown {
  background: #e0e0e0;
  border: 1px solid #bbb;
}

.cell.wrong-flag {
  background: #ffcccc;
  border: 1px solid #cc0000;
}

/* Number colors */
.cell[data-num="1"] { color: #0000ff; }
.cell[data-num="2"] { color: #008000; }
.cell[data-num="3"] { color: #ff0000; }
.cell[data-num="4"] { color: #000080; }
.cell[data-num="5"] { color: #800000; }
.cell[data-num="6"] { color: #008080; }
.cell[data-num="7"] { color: #000000; }
.cell[data-num="8"] { color: #808080; }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}
.modal-overlay.hidden { display: none; }

.modal-content {
  background: #1e1e3a;
  border-radius: 16px;
  padding: 2rem 2.5rem;
  text-align: center;
  animation: popIn 0.3s ease;
  border: 2px solid rgba(255,255,255,0.1);
  max-width: 90vw;
}

@keyframes popIn {
  from { transform: scale(0.7); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.modal-icon { font-size: 3.5rem; margin-bottom: 0.5rem; }
.modal-content h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.3rem;
}
.modal-content p {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.3rem;
}
.modal-stats {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}
.modal-content .btn {
  margin-top: 1rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
  .topbar { padding: 0.4rem 0.6rem; }
  .game-title { font-size: 0.9rem; }
  .stats { font-size: 0.8rem; gap: 0.5rem; }
  .controls-bar { padding: 0.4rem 0.5rem; gap: 0.5rem; }
  .diff-btn { padding: 0.25rem 0.6rem; font-size: 0.7rem; }
  .btn { padding: 0.3rem 0.7rem; font-size: 0.75rem; }
  .game-container { padding: 0.4rem; }
}

@media (max-height: 500px) and (orientation: landscape) {
  .topbar { padding: 0.25rem 0.5rem; }
  .game-title { font-size: 0.85rem; }
  .controls-bar { padding: 0.25rem 0.5rem; }
  .game-container { padding: 0.3rem; }
}

/* ===== SEO GAME INFO SECTION ===== */
.game-info {
  max-width: 780px;
  margin: 1rem auto;
  padding: 1rem 1.2rem;
  background: rgba(0,0,0,0.15);
  border-radius: 12px;
  color: rgba(255,255,255,0.85);
  font-size: 0.88rem;
  line-height: 1.6;
}
.game-info h2 { font-size: 1.1rem; font-weight: 800; margin-bottom: 0.5rem; }
.game-info h3 { font-size: 0.95rem; font-weight: 700; margin: 0.8rem 0 0.3rem; }
.game-info ul { padding-left: 1.2rem; }
.game-info li { margin-bottom: 0.2rem; }