:root {
  --bg: #040206;
  --panel: rgba(255, 24, 70, 0.07);
  --neon: #ff1846;
  --neon2: #ff4d6d;
  --neonBlue: #38b6ff;
  --neonBlue2: #7ad3ff;
  --grid: #1a0633;
  --text: #ffe6ec;
  --muted: rgba(255, 230, 236, 0.75);
  --cell: rgba(26, 6, 51, 0.78);
  --cellHover: rgba(38, 10, 74, 0.92);
  --border: rgba(255, 24, 70, 0.42);
}

@keyframes resetPop {
  0% {
    transform: translateY(0px) rotate(var(--tilt)) scale(1);
    opacity: 1;
    filter: saturate(1);
  }
  35% {
    transform: translateY(-6px) rotate(calc(var(--tilt) + 6deg)) scale(1.12);
    opacity: 1;
    filter: saturate(1.25);
  }
  100% {
    transform: translateY(-18px) rotate(calc(var(--tilt) + 18deg)) scale(0.6);
    opacity: 0;
    filter: saturate(1.6);
  }
}

@keyframes winCamera {
  0% {
    transform: perspective(900px) rotateX(0deg) rotateZ(0deg) scale(1);
  }
  25% {
    transform: perspective(900px) rotateX(6deg) rotateZ(-1.6deg) scale(1.06);
  }
  55% {
    transform: perspective(900px) rotateX(-5deg) rotateZ(1.2deg) scale(1.02);
  }
  100% {
    transform: perspective(900px) rotateX(0deg) rotateZ(0deg) scale(1);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 50% 15%, rgba(255, 24, 70, 0.22), transparent 60%),
    radial-gradient(900px 520px at 50% 100%, rgba(56, 182, 255, 0.12), transparent 60%),
    linear-gradient(0deg, rgba(0, 0, 0, 0.54), rgba(0, 0, 0, 0.54)),
    linear-gradient(90deg, rgba(0, 0, 0, 0.12) 0 2px, transparent 2px 100%),
    linear-gradient(0deg, rgba(0, 0, 0, 0.16) 0 2px, transparent 2px 100%),
    linear-gradient(90deg, rgba(120, 55, 55, 0.82), rgba(65, 24, 24, 0.82));
  background-size: auto, auto, auto, 120px 120px, 60px 60px, auto;
  background-position: center, center, center, 0 0, 0 0, center;
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.side-blur {
  position: fixed;
  top: 0;
  bottom: 0;
  width: min(18vw, 220px);
  opacity: 0;
  pointer-events: none;
  z-index: 5;
  backdrop-filter: blur(0px);
  transition: opacity 240ms ease, backdrop-filter 240ms ease;
}

.side-blur.left {
  left: 0;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0));
}

.side-blur.right {
  right: 0;
  background: linear-gradient(270deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0));
}

body.win-mode .side-blur {
  opacity: 1;
  backdrop-filter: blur(10px);
}

.app {
  max-width: 780px;
  margin: 0 auto;
  padding: 28px 18px 40px;
  display: grid;
  gap: 18px;
  position: relative;
  z-index: 10;
}

body.menu-open .app {
  max-width: none;
  min-height: 100vh;
  padding: 0;
}

body.game-open .app {
  max-width: none;
  min-height: 100vh;
  padding: 18px 18px 22px;
}

body.menu-open .header {
  padding: 24px 18px 0;
}

body.menu-open .menu {
  min-height: calc(100vh - 160px);
  padding: 18px;
}

body.game-open .header {
  display: none;
}

body.game-open .menu {
  display: none;
}

body.game-open .game {
  min-height: calc(100vh - 20px);
  display: grid;
  align-content: start;
  gap: 14px;
}

.hidden {
  display: none;
}

.menu {
  min-height: calc(100vh - 80px);
  display: grid;
  place-items: center;
}

.menu-card {
  width: min(820px, 100%);
  padding: 22px 18px;
  background: rgba(255, 24, 70, 0.06);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 0 22px rgba(255, 24, 70, 0.18), inset 0 0 22px rgba(255, 24, 70, 0.1);
}

.menu-title {
  margin: 4px 0 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 900;
  text-shadow: 0 0 12px rgba(255, 24, 70, 0.45), 0 0 26px rgba(255, 24, 70, 0.3);
}

.field {
  display: grid;
  gap: 6px;
  margin: 10px 0;
}

.field-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.select {
  width: 100%;
  padding: 14px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(14, 0, 28, 0.55);
  color: var(--text);
  outline: none;
  box-shadow: 0 0 18px rgba(255, 24, 70, 0.12);
  font-size: 18px;
}

.menu-actions {
  margin-top: 14px;
  display: flex;
  justify-content: flex-end;
}

body.menu-open .menu-actions {
  margin-top: 18px;
}

.menu-hint {
  margin: 14px 0 0;
  color: var(--muted);
}

.header {
  text-align: center;
}

.title {
  margin: 0;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  text-shadow: 0 0 12px rgba(255, 24, 70, 0.5), 0 0 28px rgba(255, 24, 70, 0.34),
    0 0 56px rgba(255, 24, 70, 0.24);
}

.subtitle {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.35;
}

.panel {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 0 22px rgba(255, 24, 70, 0.18), inset 0 0 22px rgba(255, 24, 70, 0.12);
}

@media (max-width: 640px) {
  .panel {
    grid-template-columns: 1fr 1fr;
    row-gap: 10px;
  }

  .panel-actions {
    grid-column: 1 / -1;
    justify-content: space-between;
  }
}

.panel-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.status {
  display: grid;
  gap: 4px;
}

.label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.value {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-shadow: 0 0 14px rgba(255, 24, 70, 0.55);
}

.btn {
  cursor: pointer;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 24, 70, 0.08);
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 0 18px rgba(255, 24, 70, 0.12);
  font-size: 16px;
}

body.menu-open .btn {
  width: 100%;
  padding: 18px 18px;
  font-size: 18px;
}

body.menu-open .menu-actions {
  justify-content: stretch;
}

.btn:hover {
  background: rgba(255, 24, 70, 0.14);
}

.board {
  width: min(640px, 92vw);
  aspect-ratio: 1;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(var(--n, 3), 1fr);
  grid-template-rows: repeat(var(--n, 3), 1fr);
  gap: 10px;
  padding: 10px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: rgba(14, 0, 28, 0.7);
  box-shadow: 0 0 34px rgba(255, 24, 70, 0.18), 0 0 26px rgba(56, 182, 255, 0.1),
    inset 0 0 30px rgba(255, 24, 70, 0.1);
  transform-origin: 50% 50%;
}

.boards {
  display: grid;
  justify-content: center;
  align-items: start;
  gap: 26px;
}

.game {
  position: relative;
}

.exit-btn {
  position: fixed;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255, 24, 70, 0.6);
  background: rgba(255, 24, 70, 0.12);
  color: var(--neon);
  font-weight: 900;
  letter-spacing: 0.08em;
  cursor: pointer;
  z-index: 50;
  box-shadow: 0 0 18px rgba(255, 24, 70, 0.18), inset 0 0 18px rgba(255, 24, 70, 0.1);
  text-shadow: 0 0 10px rgba(255, 24, 70, 0.65);
}

.exit-btn:hover {
  background: rgba(255, 24, 70, 0.18);
}

body.mode-ttt .boards {
  grid-template-columns: 1fr;
}

body.mode-ttt #board2 {
  display: none;
}

body.mode-bingo .boards {
  grid-template-columns: repeat(2, minmax(0, 360px));
  max-width: min(920px, 96vw);
  margin: 0 auto;
}

body.mode-bingo .board {
  width: 100%;
  max-width: 360px;
  margin: 0;
}

body.mode-bingo .board {
  gap: 6px;
  padding: 8px;
  box-shadow: 0 0 26px rgba(255, 24, 70, 0.14), 0 0 18px rgba(56, 182, 255, 0.08),
    inset 0 0 24px rgba(255, 24, 70, 0.08);
}

body.mode-bingo .cell {
  font-size: clamp(14px, calc(44px - (var(--n, 5) * 3px)), 28px);
  border-radius: 12px;
  text-shadow: 0 0 10px rgba(255, 24, 70, 0.42), 0 0 18px rgba(255, 24, 70, 0.28);
  box-shadow: 0 0 10px rgba(255, 24, 70, 0.12), inset 0 0 14px rgba(255, 24, 70, 0.06);
}

@media (max-width: 780px) {
  body.mode-bingo .boards {
    grid-template-columns: 1fr;
  }

  body.mode-bingo .board {
    width: min(520px, 92vw);
  }
}

body.win-mode .board.win-camera {
  animation: winCamera 1100ms ease-in-out 0ms 2;
}

.cell {
  cursor: pointer;
  border: 1px solid rgba(255, 24, 70, 0.32);
  border-radius: 16px;
  background: var(--cell);
  color: var(--text);
  font-size: clamp(34px, calc(80px - (var(--n, 3) * 4px)), 84px);
  font-weight: 900;
  line-height: 1;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  transition: transform 100ms ease, background 120ms ease, box-shadow 140ms ease;

  --tilt: 0deg;
  text-shadow: 0 0 14px rgba(255, 24, 70, 0.6), 0 0 30px rgba(255, 24, 70, 0.42),
    0 0 60px rgba(255, 24, 70, 0.3);
  box-shadow: 0 0 16px rgba(255, 24, 70, 0.16), inset 0 0 22px rgba(255, 24, 70, 0.08);
}

.cell:hover {
  background: var(--cellHover);
  transform: translateY(-1px) rotate(var(--tilt));
  box-shadow: 0 0 26px rgba(255, 24, 70, 0.22), 0 0 18px rgba(56, 182, 255, 0.12),
    inset 0 0 26px rgba(255, 24, 70, 0.1);
}

.cell:disabled {
  cursor: not-allowed;
  opacity: 0.92;
}

.cell.x {
  color: var(--neon);
  text-shadow: 0 0 14px rgba(255, 24, 70, 0.75), 0 0 34px rgba(255, 24, 70, 0.52),
    0 0 70px rgba(255, 24, 70, 0.35);
}

.cell.o {
  color: var(--neonBlue);
  text-shadow: 0 0 14px rgba(56, 182, 255, 0.75), 0 0 34px rgba(56, 182, 255, 0.52),
    0 0 70px rgba(56, 182, 255, 0.35);
}

.cell.win {
  border-color: rgba(255, 24, 70, 0.8);
  background: rgba(255, 24, 70, 0.18);
  box-shadow: 0 0 34px rgba(255, 24, 70, 0.36), inset 0 0 30px rgba(255, 24, 70, 0.14);
  animation: winPulse 700ms ease-in-out infinite;
}

.cell.reset-pop {
  animation: resetPop 420ms ease-out forwards;
}

.footer {
  text-align: center;
  color: var(--muted);
}

.particle-burst {
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.particle {
  position: absolute;
  left: 0;
  top: 0;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--pcolor, var(--neon));
  box-shadow: 0 0 12px rgba(255, 24, 70, 0.65), 0 0 26px rgba(255, 24, 70, 0.45);
  transform: translate(-50%, -50%);
  animation: burst 520ms ease-out forwards;
}

@keyframes burst {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--dx, 0px)), calc(-50% + var(--dy, 0px))) scale(0.2);
  }
}

@keyframes winPulse {
  0% {
    filter: brightness(1.05);
    box-shadow: 0 0 34px rgba(255, 24, 70, 0.36), 0 0 22px rgba(56, 182, 255, 0.14),
      inset 0 0 30px rgba(255, 24, 70, 0.14);
  }
  50% {
    filter: brightness(1.25);
    box-shadow: 0 0 54px rgba(255, 24, 70, 0.48), 0 0 38px rgba(56, 182, 255, 0.22),
      inset 0 0 42px rgba(255, 24, 70, 0.2);
  }
  100% {
    filter: brightness(1.05);
    box-shadow: 0 0 34px rgba(255, 24, 70, 0.36), 0 0 22px rgba(56, 182, 255, 0.14),
      inset 0 0 30px rgba(255, 24, 70, 0.14);
  }
}