:root {
  --bg: #0f1117;
  --text: #f8fafc;
  --muted: #a1a1aa;
  --emerald: #10b981;
  --violet: #8b5cf6;
  --red: #fb7185;
  --yellow: #facc15;
  --border: rgba(255, 255, 255, 0.1);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background:
    radial-gradient(circle at top left, rgba(139, 92, 246, 0.22), transparent 34%),
    radial-gradient(circle at top right, rgba(16, 185, 129, 0.14), transparent 30%),
    var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

.app-header {
  padding: 2rem 0 1rem;
}

.back-link {
  display: inline-flex;
  margin-bottom: 1.2rem;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.back-link:hover {
  color: var(--emerald);
}

.hero {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 1rem;
  padding: 2rem;
  border-radius: 28px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.065), rgba(255, 255, 255, 0.025));
  box-shadow: var(--shadow);
}

.eyebrow,
.panel-kicker {
  display: inline-flex;
  color: var(--emerald);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.78rem;
  font-weight: 900;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 5.8rem);
  line-height: 0.9;
  letter-spacing: -3px;
  margin-bottom: 1rem;
}

.hero p,
.info-card p,
.panel-card li,
.site-footer p {
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.3rem;
}

.tags span {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.42rem 0.75rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.85rem;
}

.info-card,
.game-panel,
.panel-card {
  border: 1px solid var(--border);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
  box-shadow: var(--shadow);
}

.info-card {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

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

.info-card strong {
  font-size: 1.5rem;
  margin: 0.35rem 0;
}

.game-layout {
  display: grid;
  grid-template-columns: 1fr 330px;
  gap: 1rem;
  padding: 1rem 0 4rem;
  align-items: start;
}

.game-panel {
  position: relative;
  overflow: hidden;
}

.game-topbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.game-topbar div {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 0.85rem;
  background: rgba(255, 255, 255, 0.04);
}

.game-topbar span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

.game-topbar strong {
  font-size: 1.35rem;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    #12151f;
  background-size: 40px 40px;
}

.game-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(15, 17, 23, 0.78);
  backdrop-filter: blur(8px);
  padding: 1.2rem;
  text-align: center;
}

.game-overlay.hidden {
  display: none;
}

.game-overlay h2 {
  font-size: 2.4rem;
  margin-bottom: 0.7rem;
}

.game-overlay p {
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 1rem;
}

.game-overlay button {
  border: none;
  border-radius: 999px;
  padding: 0.95rem 1.3rem;
  color: white;
  font-weight: 900;
  cursor: pointer;
  background: linear-gradient(135deg, var(--violet), var(--emerald));
}

.side-panel {
  display: grid;
  gap: 1rem;
}

.panel-card {
  padding: 1.3rem;
}

.panel-card h2 {
  font-size: 1.35rem;
  margin-bottom: 0.8rem;
}

.panel-card ul {
  padding-left: 1.1rem;
}

.panel-card li {
  margin-bottom: 0.55rem;
}

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

@media (max-width: 980px) {
  .hero,
  .game-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 1.2rem;
  }

  h1 {
    letter-spacing: -2px;
  }

  .game-topbar {
    grid-template-columns: repeat(2, 1fr);
  }

  canvas {
    min-height: 420px;
  }
}