/* Сапёр в космосе — стили */
:root {
  --bg: #050814;
  --panel: rgba(13, 20, 40, .72);
  --line: rgba(120, 160, 255, .18);
  --text: #e8eeff;
  --muted: #8ea0c9;
  --accent: #38bdf8;
  --danger: #f43f5e;
  --cell: 36px;
  --cols: 9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 600px at 18% -10%, rgba(59, 91, 219, .28), transparent 60%),
    radial-gradient(900px 600px at 85% 110%, rgba(126, 58, 242, .22), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  display: flex;
  justify-content: center;
  padding: 26px 12px 46px;
}

/* Звёздное небо */
.stars {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 22%, rgba(255, 255, 255, .9), transparent),
    radial-gradient(1px 1px at 34% 68%, rgba(255, 255, 255, .7), transparent),
    radial-gradient(1.5px 1.5px at 56% 12%, rgba(190, 220, 255, .9), transparent),
    radial-gradient(1px 1px at 71% 44%, rgba(255, 255, 255, .65), transparent),
    radial-gradient(1.5px 1.5px at 83% 76%, rgba(255, 235, 200, .85), transparent),
    radial-gradient(1px 1px at 93% 28%, rgba(255, 255, 255, .7), transparent),
    radial-gradient(1px 1px at 22% 88%, rgba(190, 220, 255, .6), transparent),
    radial-gradient(1px 1px at 48% 92%, rgba(255, 255, 255, .6), transparent);
  background-size: 640px 640px;
  background-repeat: repeat;
  animation: twinkle 5s ease-in-out infinite alternate;
}

@keyframes twinkle {
  from { opacity: .5; }
  to   { opacity: 1; }
}

.wrap { width: 100%; max-width: 1060px; }

.head { text-align: center; }

h1 {
  margin: 0 0 6px;
  font-size: clamp(26px, 5vw, 40px);
  letter-spacing: .5px;
  background: linear-gradient(90deg, #7dd3fc, #c4b5fd 55%, #f0abfc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sub { margin: 0 0 20px; color: var(--muted); }

/* Панель управления */
.panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  backdrop-filter: blur(4px);
}

.seg { display: flex; gap: 6px; flex-wrap: wrap; }

.seg-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 9px 14px;
  border-radius: 10px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.seg-btn:hover { color: var(--text); border-color: rgba(120, 160, 255, .4); }
.seg-btn.active {
  background: rgba(56, 189, 248, .14);
  color: var(--accent);
  border-color: rgba(56, 189, 248, .45);
}

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

.hud-box {
  background: #0a1128;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 14px;
  min-width: 76px;
  text-align: center;
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.face {
  width: 50px;
  height: 50px;
  font-size: 26px;
  line-height: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: linear-gradient(160deg, #1c2a52, #131d3c);
  cursor: pointer;
  transition: transform .15s;
}
.face:hover { transform: scale(1.1) rotate(-8deg); }

.hud-btn {
  background: #0a1128;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 11px;
  font-size: 17px;
  cursor: pointer;
}

.best {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  min-height: 22px;
  margin: 10px 0;
}

/* Игровое поле */
.board {
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell));
  gap: 3px;
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
  padding: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 14px 44px rgba(0, 0, 0, .5), inset 0 0 70px rgba(59, 91, 219, .12);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: manipulation;
}

.cell {
  width: var(--cell);
  height: var(--cell);
  padding: 0;
  border: 1px solid #2a3a6a;
  border-radius: 6px;
  background: linear-gradient(160deg, #1d2b55, #131d3c);
  color: #fff;
  font-family: inherit;
  font-size: calc(var(--cell) * .5);
  font-weight: 800;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  transition: transform .07s, border-color .12s, background .12s;
}
.cell:hover { transform: scale(1.07); border-color: var(--accent); }

.cell.revealed {
  background: #0a1128;
  border-color: #1b2647;
  cursor: default;
  animation: pop .16s ease;
}
.cell.revealed:hover { transform: none; border-color: #1b2647; }

.cell.flagged {
  background: linear-gradient(160deg, #243769, #18254c);
  animation: pop .15s ease;
}

.cell.mine { background: #2a1230; border-color: #7f1d3a; }

.cell.boom {
  background: #6b1220;
  border-color: #fb7185;
  box-shadow: 0 0 20px rgba(244, 63, 94, .8);
  animation: shake .4s ease;
}

.cell.wrong { opacity: .55; }

.cell[data-n="1"] { color: #38bdf8; text-shadow: 0 0 8px rgba(56, 189, 248, .5); }
.cell[data-n="2"] { color: #4ade80; text-shadow: 0 0 8px rgba(74, 222, 128, .45); }
.cell[data-n="3"] { color: #fbbf24; text-shadow: 0 0 8px rgba(251, 191, 36, .45); }
.cell[data-n="4"] { color: #f472b6; text-shadow: 0 0 8px rgba(244, 114, 182, .45); }
.cell[data-n="5"] { color: #f87171; text-shadow: 0 0 8px rgba(248, 113, 113, .45); }
.cell[data-n="6"] { color: #2dd4bf; text-shadow: 0 0 8px rgba(45, 212, 191, .45); }
.cell[data-n="7"] { color: #e2e8f0; text-shadow: 0 0 8px rgba(226, 232, 240, .4); }
.cell[data-n="8"] { color: #94a3b8; }

@keyframes pop {
  from { transform: scale(.6); opacity: .4; }
  to   { transform: scale(1); opacity: 1; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  50% { transform: translateX(3px); }
  75% { transform: translateX(-2px); }
}

/* Подсказки */
.help {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
}

/* Модальное окно */
.modal {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(3, 6, 15, .85);
}
.modal.hidden { display: none; }

.modal-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 30px 34px;
  max-width: 400px;
  text-align: center;
  box-shadow: 0 0 70px rgba(56, 189, 248, .18);
  animation: rise .25s ease;
}
.modal-card h2 { margin: 0 0 10px; font-size: 24px; }
.modal-card p { margin: 0 0 20px; color: var(--muted); line-height: 1.5; }

.btn {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 12px 26px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .12s, box-shadow .12s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14, 165, 233, .35); }

@keyframes rise {
  from { transform: translateY(14px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

@media (max-width: 560px) {
  .panel { justify-content: center; }
  .hud { width: 100%; justify-content: center; }
}