@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&family=IBM+Plex+Mono:wght@400;600&display=swap');

:root {
  --bg-1: #0b1c26;
  --bg-2: #16324a;
  --bg-3: #1c6b66;
  --surface: rgba(15, 24, 35, 0.75);
  --surface-strong: rgba(11, 17, 25, 0.92);
  --stroke: rgba(255, 255, 255, 0.14);
  --text: #f4f1ea;
  --muted: #c4cbd2;
  --accent: #f4b63f;
  --accent-2: #ff6f59;
  --good: #34d399;
  --bad: #fb7185;
  --cell: rgba(255, 255, 255, 0.08);
  --cell-open: rgba(255, 255, 255, 0.15);
  --cell-gap: 4px;
  --shadow: 0 20px 60px rgba(5, 15, 25, 0.45);
  --icon-flag: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0naHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmcnIHZpZXdCb3g9JzAgMCA2NCA2NCc+CiAgPHJlY3QgeD0nMTYnIHk9JzYnIHdpZHRoPSc2JyBoZWlnaHQ9JzUyJyByeD0nMycgZmlsbD0nI2Y0YjYzZicvPgogIDxwYXRoIGQ9J00yMiAxMGgyOGwtNSAxNCA1IDEySDIyeicgZmlsbD0nI2Y0YjYzZicvPgo8L3N2Zz4=");
  --icon-mine: url("data:image/svg+xml;base64,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");
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, var(--bg-1), var(--bg-2) 40%, var(--bg-3));
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 48px 20px 64px;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: absolute;
  inset: -20% 0 auto 0;
  height: 70vh;
  background: radial-gradient(circle at 20% 20%, rgba(244, 182, 63, 0.18), transparent 55%),
    radial-gradient(circle at 80% 30%, rgba(255, 111, 89, 0.2), transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(52, 211, 153, 0.2), transparent 55%);
  filter: blur(0px);
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}

body::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(120deg, rgba(255, 255, 255, 0.04) 0%, transparent 60%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 7px);
  opacity: 0.35;
  pointer-events: none;
}

.app {
  width: min(1100px, 100%);
  display: grid;
  gap: 28px;
  position: relative;
  z-index: 1;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 28px;
  border: 1px solid var(--stroke);
  border-radius: 18px;
  background: var(--surface);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  animation: rise 0.6s ease-out;
}

.kicker {
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-size: 0.7rem;
  color: var(--muted);
  margin: 0 0 12px;
}

.hero h1 {
  margin: 0 0 6px;
  font-size: clamp(2.5rem, 3vw, 3.4rem);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.stat {
  min-width: 140px;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 18, 28, 0.55);
}

.stat span {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
  margin-bottom: 8px;
}

.stat strong {
  font-family: 'IBM Plex Mono', 'Fira Mono', monospace;
  font-size: 1.4rem;
}

#status[data-tone='ready'] {
  color: var(--muted);
}

#status[data-tone='playing'] {
  color: var(--accent);
}

#status[data-tone='win'] {
  color: var(--good);
}

#status[data-tone='lose'] {
  color: var(--bad);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: var(--surface-strong);
  animation: rise 0.7s ease-out;
}

.control-group {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.nickname-group input {
  width: 140px;
}

.nickname-group input::placeholder {
  color: var(--muted);
}

.toggles {
  gap: 14px;
}

.control-group label {
  font-size: 0.85rem;
  color: var(--muted);
}

select,
input {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 0.95rem;
  font-family: 'Space Grotesk', sans-serif;
}

select option {
  background: #0b1c26;
  color: var(--text);
}

.custom-fields {
  gap: 8px;
}

.control-actions {
  margin-left: auto;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text);
  position: relative;
}

.toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-ui {
  width: 46px;
  height: 26px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.toggle-ui::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fdf2d0;
  transition: transform 0.2s ease;
}

.toggle input:checked + .toggle-ui {
  background: rgba(244, 182, 63, 0.35);
  border-color: rgba(244, 182, 63, 0.8);
}

.toggle input:checked + .toggle-ui::after {
  transform: translateX(18px);
  background: #f4b63f;
}

.hint-info {
  font-size: 0.85rem;
  color: var(--muted);
}

button {
  border: none;
  cursor: pointer;
  font-family: 'Space Grotesk', sans-serif;
}

.btn-primary {
  padding: 10px 18px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #f8d36c);
  color: #1a1408;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(244, 182, 63, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(244, 182, 63, 0.35);
}

.btn-ghost {
  padding: 10px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.arena {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 20px;
  align-items: start;
}

.board-panel {
  padding: 20px;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: rgba(8, 14, 20, 0.8);
  box-shadow: var(--shadow);
  overflow: auto;
  animation: rise 0.8s ease-out;
}

.leaderboard-panel {
  padding: 20px;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: rgba(10, 18, 28, 0.78);
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
  animation: rise 0.9s ease-out;
}

.panel-header h2 {
  margin: 0 0 6px;
  font-size: 1.2rem;
}

.panel-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.leaderboard-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
  font-family: 'IBM Plex Mono', 'Fira Mono', monospace;
  font-size: 0.95rem;
  color: var(--text);
}

.leaderboard-list li.empty {
  color: var(--muted);
  list-style: none;
  padding-left: 0;
}

.board {
  --cell-size: 32px;
  display: grid;
  gap: var(--cell-gap);
  justify-content: center;
  align-content: center;
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  background: var(--cell);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  display: grid;
  place-items: center;
  transition: transform 0.1s ease, background 0.2s ease, border-color 0.2s ease;
  user-select: none;
  -webkit-touch-callout: none;
  touch-action: manipulation;
}

.cell:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.3);
}

.cell.open {
  background: var(--cell-open);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(0);
}

.cell.open.mine {
  background-color: rgba(255, 111, 89, 0.25);
  border-color: rgba(255, 111, 89, 0.6);
  background-image: var(--icon-mine);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 70%;
}

.cell.flagged {
  color: var(--accent);
  background-image: var(--icon-flag);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 70%;
}

.cell.active {
  outline: 2px solid rgba(244, 182, 63, 0.7);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(244, 182, 63, 0.15);
}

.cell.hint {
  border-color: rgba(52, 211, 153, 0.8);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.18);
  animation: hintPulse 0.6s ease-in-out 2;
}

.cell.wrong {
  color: var(--bad);
  background: rgba(251, 113, 133, 0.12);
}

.cell[data-num='1'] {
  color: #38bdf8;
}

.cell[data-num='2'] {
  color: #34d399;
}

.cell[data-num='3'] {
  color: #f97316;
}

.cell[data-num='4'] {
  color: #f472b6;
}

.cell[data-num='5'] {
  color: #facc15;
}

.cell[data-num='6'] {
  color: #22c55e;
}

.cell[data-num='7'] {
  color: #a5b4fc;
}

.cell[data-num='8'] {
  color: #e2e8f0;
}

.tips {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.tips p {
  margin: 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: translateY(-20px);
  }
  to {
    transform: translateY(20px);
  }
}

@keyframes hintPulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }

  .control-actions {
    margin-left: 0;
    width: 100%;
  }

  .arena {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    padding: 28px 16px 48px;
  }

  .stat {
    min-width: 120px;
  }

  .board {
    --cell-size: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}