:root {
  --bg-black: #000000;
  --panel-bg: #0d0d0d;
  --panel-border: #222222;
  --cell-open-bg: #070707;
  --cell-border: #161616;
  --accent-green: #94EA2A;
  --accent-pink: #E851D9;
  --accent-red: #ff385c;
  --text-main: #ffffff;
  --text-muted: #777777;
  --cell-size: 38px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

body {
  background-color: var(--bg-black);
  color: var(--text-main);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 28px 16px;
  overflow-x: hidden;
}

.app-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  max-width: 100%;
}

.header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.title {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--text-main);
  text-transform: uppercase;
  text-shadow: 0 0 18px rgba(148, 234, 42, 0.25);
}

.difficulty-selector {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  background: var(--panel-bg);
  padding: 6px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
}

.diff-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: all 0.15s ease;
}

.diff-btn span {
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.75;
}

.diff-btn:hover {
  color: var(--text-main);
  background: #151515;
}

.diff-btn.active {
  color: #000000;
  background: var(--accent-green);
  box-shadow: 0 0 14px rgba(148, 234, 42, 0.35);
}

.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: 560px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 10px 18px;
  border-radius: 12px;
}

.stat-box {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Courier New", Courier, monospace;
  font-size: 1.5rem;
  font-weight: 800;
  min-width: 90px;
}

.stat-box:last-child {
  justify-content: flex-end;
}

.stat-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.timer-label {
  font-size: 1.2rem;
  color: var(--accent-green);
}

.controls-center {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-btn,
.restart-btn {
  background: #161616;
  color: var(--text-main);
  border: 1px solid #2b2b2b;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.15s ease;
}

.tool-btn img {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

.tool-btn.flag-mode {
  border-color: var(--accent-pink);
  box-shadow: 0 0 10px rgba(232, 81, 217, 0.25);
  color: var(--accent-pink);
}

.tool-btn:hover,
.restart-btn:hover {
  background: #222222;
  border-color: #444444;
}

.restart-btn:active,
.tool-btn:active {
  transform: scale(0.96);
}

.status-banner {
  padding: 10px 22px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-align: center;
  transition: all 0.2s ease;
}

.status-banner.hidden {
  display: none;
}

.status-banner.win {
  background: rgba(148, 234, 42, 0.15);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
}

.status-banner.lose {
  background: rgba(255, 56, 92, 0.15);
  border: 1px solid var(--accent-red);
  color: var(--accent-red);
}

.board-wrapper {
  max-width: 100%;
  overflow: auto;
  padding: 10px;
  background: #050505;
  border: 1px solid #1c1c1c;
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.8);
}

.board {
  display: grid;
  gap: 3px;
  background-color: var(--bg-black);
  margin: 0 auto;
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background-color: var(--cell-open-bg);
  border: 1px solid var(--cell-border);
  border-radius: 4px;
  transition: transform 0.08s ease, background-color 0.12s ease;
}

.cell.closed {
  border-color: transparent;
  background-color: transparent;
}

.cell.closed:hover {
  transform: scale(1.06);
  z-index: 2;
  filter: brightness(1.08);
}

.cell.revealed {
  cursor: default;
  background-color: #050505;
  border: 1px solid #141414;
}

.cell.revealed.chord-ready {
  cursor: pointer;
}

.cell.mine-hit {
  background-color: rgba(255, 56, 92, 0.28);
  border-color: var(--accent-red);
}

.cell.false-flag {
  background-color: rgba(232, 81, 217, 0.2);
  border-color: var(--accent-pink);
}

/* Трава на закрытой клетке */
.cell-grass {
  width: 100%;
  height: 100%;
  object-fit: fill;
  pointer-events: none;
  display: block;
}

/* Иконка внутри клетки (флаг, мина или цифра) */
.cell-icon {
  width: 68%;
  height: 68%;
  object-fit: contain;
  pointer-events: none;
  position: absolute;
  z-index: 1;
}

.cell-flag {
  width: 66%;
  height: 66%;
  object-fit: contain;
  pointer-events: none;
  position: absolute;
  z-index: 2;
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.65));
  animation: popIn 0.14s ease-out;
}

@keyframes popIn {
  0% {
    transform: scale(0.4);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.footer-hint {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 768px) {
  :root {
    --cell-size: 32px;
  }
  .hud {
    padding: 8px 12px;
  }
  .stat-box {
    font-size: 1.25rem;
    min-width: 70px;
  }
}