:root {
  --bg: #0d0d0f;
  --bg-elevated: #16161a;
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --accent: #22d3ee;
  --accent-dim: #0891b2;
  --border: #27272a;
  --success: #34d399;
  --warning: #fbbf24;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Outfit', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13, 13, 15, 0.9);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.logo {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.05em;
}

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

nav {
  display: flex;
  gap: 2rem;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--accent);
}

main {
  flex: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
  width: 100%;
}

.hero {
  text-align: center;
  padding: 4rem 0 6rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 480px;
  margin: 0 auto 2.5rem;
}

.cta {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.2s, transform 0.15s;
}

.cta:hover {
  background: var(--accent-dim);
  transform: translateY(-2px);
}

.rules {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.rules h2 {
  font-size: 1.75rem;
  margin-bottom: 2rem;
  text-align: center;
}

.rules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.rule-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.rule-card:hover {
  border-color: var(--accent-dim);
}

.rule-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 0.75rem;
}

.rule-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.rule-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.scores {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.scores h2 {
  font-size: 1.75rem;
  margin-bottom: 2rem;
  text-align: center;
}

#scores-container {
  min-height: 4rem;
}

.scores-loading,
.scores-empty,
.scores-error {
  text-align: center;
  color: var(--text-muted);
}

.scores-error {
  color: var(--warning);
}

.scores-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.scores-table th,
.scores-table td {
  padding: 0.75rem 1rem;
  text-align: left;
}

.scores-table th {
  background: rgba(0, 0, 0, 0.2);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.scores-table tbody tr {
  border-top: 1px solid var(--border);
}

.scores-table tbody tr:hover {
  background: rgba(34, 211, 238, 0.04);
}

.scores-table .rank {
  font-family: "JetBrains Mono", monospace;
  color: var(--text-muted);
  width: 3rem;
}

.scores-table .score {
  font-family: "JetBrains Mono", monospace;
  font-weight: 600;
  color: var(--accent);
  text-align: right;
}

.download {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.download h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.download > p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.store-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.store-btn {
  padding: 0.75rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  transition: border-color 0.2s, background 0.2s;
}

.store-btn:hover {
  border-color: var(--accent);
  background: rgba(34, 211, 238, 0.08);
}

footer {
  padding: 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  header {
    padding: 1rem;
  }

  nav {
    gap: 1rem;
  }

  main {
    padding: 2rem 1rem;
  }

  .hero {
    padding: 2rem 0 4rem;
  }
}