:root {
  --bg: #0f1114;
  --bg-soft: #171a1f;
  --panel: rgba(15, 17, 20, 0.82);
  --line: rgba(255, 255, 255, 0.12);
  --text: #f4ecd9;
  --muted: #b2ab9b;
  --accent: #d4b36b;
  --accent-strong: #ebc978;
  --danger: #f36d6d;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(212, 179, 107, 0.08), transparent 32%),
    radial-gradient(circle at bottom right, rgba(87, 133, 206, 0.15), transparent 28%),
    linear-gradient(180deg, #111317 0%, #090b0d 100%);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei UI", sans-serif;
}

body {
  min-height: 100vh;
}

.shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.hud {
  display: flex;
  gap: 24px;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.hud h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.tagline {
  width: min(580px, 100%);
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(116px, 1fr));
  gap: 12px;
  margin: 0;
}

.stats div {
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.stats dt {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stats dd {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.stage-shell {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at center, rgba(255, 224, 154, 0.08), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
  box-shadow: var(--shadow);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 24px;
  background: rgba(6, 8, 11, 0.54);
  backdrop-filter: blur(5px);
}

.overlay[data-mode="win"] {
  background:
    radial-gradient(circle at top, rgba(244, 201, 120, 0.18), transparent 34%),
    rgba(6, 8, 11, 0.36);
}

.overlay.hidden {
  display: none;
}

.panel {
  position: relative;
  z-index: 1;
  width: min(420px, 100%);
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel.is-win {
  overflow: hidden;
  border-color: rgba(255, 232, 178, 0.38);
  background:
    radial-gradient(circle at top, rgba(255, 214, 122, 0.18), transparent 55%),
    rgba(17, 19, 23, 0.9);
  box-shadow:
    0 22px 80px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(255, 233, 182, 0.12) inset;
}

.overlay-effects {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.panel.is-win::before {
  content: "";
  position: absolute;
  inset: -60% -20% auto;
  height: 160px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.24), transparent);
  transform: rotate(8deg);
  animation: shine 2.8s ease-in-out infinite;
}

.panel-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.panel h2 {
  margin: 0;
  font-size: 30px;
  letter-spacing: -0.05em;
}

.panel.is-win h2 {
  font-size: 38px;
  letter-spacing: -0.06em;
}

.panel p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

#panel-copy[hidden] {
  display: none;
}

button {
  margin-top: 24px;
  border: 0;
  padding: 14px 18px;
  width: 100%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #241d12;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
  box-shadow: 0 12px 30px rgba(212, 179, 107, 0.32);
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

.panel-link {
  display: inline-flex;
  margin-top: 14px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-link:hover {
  color: var(--text);
}

.tips {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.tips p {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  line-height: 1.65;
}

.tips span {
  display: inline-block;
  margin-right: 8px;
  color: var(--text);
  font-weight: 700;
}

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

  .stats,
  .tips {
    grid-template-columns: 1fr;
  }

  .shell {
    width: min(100vw - 24px, 1120px);
    padding-top: 20px;
  }
}

@keyframes shine {
  0% {
    transform: translateX(-120%) rotate(8deg);
    opacity: 0;
  }

  24% {
    opacity: 1;
  }

  50% {
    transform: translateX(120%) rotate(8deg);
    opacity: 0;
  }

  100% {
    transform: translateX(120%) rotate(8deg);
    opacity: 0;
  }
}