:root {
  --bg: #0b1224;
  --panel: #0f172a;
  --panel-2: #111827;
  --accent: #38bdf8;
  --accent-2: #06b6d4;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --danger: #f43f5e;
  --shadow: rgba(0, 0, 0, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(circle at 20% 20%, #1f2937, #0b1224 55%);
  color: var(--text);
  font-family: "Segoe UI", "Trebuchet MS", Arial, sans-serif;
}

.shell {
  width: min(960px, 96vw);
  background: linear-gradient(145deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 16px 50px var(--shadow);
}

.top h1 {
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.top p {
  margin: 0;
  color: var(--muted);
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 10px 30px var(--shadow);
}

.label {
  margin: 0;
  color: var(--muted);
}

.value {
  margin: 6px 0 0;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.cta {
  margin-top: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.leaderboard {
  margin-top: 18px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.lb-row {
  display: grid;
  grid-template-columns: 80px 1fr 90px;
  gap: 12px;
  padding: 12px 16px;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.lb-row:last-child {
  border-bottom: none;
}

.lb-rank {
  font-weight: 700;
  color: var(--accent);
}

.lb-name {
  font-weight: 600;
}

.lb-score {
  text-align: right;
  font-weight: 700;
}

.hud {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: space-between;
  flex-wrap: wrap;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 14px;
}

.stat {
  font-weight: 600;
  color: var(--text);
}

.stat span {
  margin-left: 8px;
  color: var(--accent);
  font-size: 1.2rem;
}

.spacer {
  flex: 1;
}

button,
.button-link,
.play-button {
  border: none;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #0b1224;
  font-weight: 700;
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.2s ease;
  box-shadow: 0 8px 20px rgba(56, 189, 248, 0.3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
}

button:hover,
.button-link:hover,
.play-button:hover {
  transform: translateY(-1px);
}

button:active,
.button-link:active,
.play-button:active {
  transform: translateY(0);
  box-shadow: 0 6px 14px rgba(56, 189, 248, 0.25);
}

.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.button-link {
  color: inherit;
}

.play-button {
  padding: 12px 18px;
  font-size: 1.05rem;
}

.message {
  margin: 14px 0 18px;
  color: var(--muted);
}

.arena {
  position: relative;
  height: 60vh;
  min-height: 320px;
  background: radial-gradient(circle at 30% 40%, rgba(56, 189, 248, 0.07), transparent 40%),
    radial-gradient(circle at 70% 20%, rgba(6, 182, 212, 0.07), transparent 38%),
    radial-gradient(circle at 50% 60%, rgba(255, 255, 255, 0.04), transparent 55%),
    #0c1529;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.circle {
  position: absolute;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #e0f2fe, var(--accent));
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.45);
  display: none;
  opacity: 0;
  transform: scale(0.95);
  cursor: pointer;
  will-change: transform;
}

.circle.visible {
  display: block;
  opacity: 1;
  animation: pop 0.18s ease;
  transform: scale(1);
}

@keyframes pop {
  0% {
    transform: scale(0.7);
  }
  100% {
    transform: scale(1);
  }
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.overlay.hidden {
  display: none;
}

.overlay-card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 14px;
  padding: 22px 24px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: 0 12px 32px var(--shadow);
  text-align: center;
  min-width: 220px;
}

.overlay-title {
  margin: 0 0 8px;
  font-size: 1.3rem;
  color: var(--danger);
}

.overlay-sub {
  margin: 4px 0 12px;
  color: var(--muted);
}

.overlay-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  body {
    padding: 14px;
  }

  .shell {
    padding: 20px;
    width: 100%;
  }

  .top h1 {
    font-size: 1.5rem;
  }

  .top p {
    font-size: 0.95rem;
  }

  .hud {
    gap: 10px;
  }

  .message {
    margin: 10px 0 14px;
  }

  .arena {
    height: clamp(260px, 56vh, 420px);
  }

  .lb-row {
    grid-template-columns: 60px 1fr 70px;
  }
}

@media (max-height: 520px) {
  body {
    padding: 10px;
  }

  .shell {
    padding: 16px;
  }

  .top h1 {
    font-size: 1.35rem;
  }

  .top p,
  .message,
  .stat {
    font-size: 0.95rem;
  }

  button {
    padding: 8px 12px;
  }

  .arena {
    height: clamp(200px, 62vh, 320px);
    min-height: 200px;
  }

  .overlay-card {
    padding: 18px;
  }
}