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

:root {
  --bg: #070b14;
  --surface: #111827;
  --border: #1e3a5f;
  --text: #e8f0ff;
  --muted: #8ba3c7;
  --accent: #5eead4;
  --accent2: #818cf8;
  --gold: #fbbf24;
  --danger: #f87171;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.stars {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1px 1px at 10% 20%, #fff8, transparent),
    radial-gradient(1px 1px at 30% 60%, #fff6, transparent),
    radial-gradient(1.5px 1.5px at 70% 30%, #fff9, transparent),
    radial-gradient(1px 1px at 85% 75%, #fff5, transparent),
    radial-gradient(ellipse at 50% 0%, #1a2744 0%, transparent 55%),
    var(--bg);
  pointer-events: none;
  z-index: 0;
}

.nav, main, .footer { position: relative; z-index: 1; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  text-decoration: none;
}

.nav nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

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

.btn-primary, .btn-ghost {
  display: inline-block;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  color: #041018;
}

.btn-primary:hover { filter: brightness(1.08); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover { color: var(--text); border-color: var(--accent); }

.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn-block { width: 100%; text-align: center; margin-top: 0.5rem; }

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  text-decoration: underline;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
  align-items: center;
}

@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; }
  .nav nav a:not(.btn-primary) { display: none; }
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: #1e3a5f44;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-desc { color: var(--muted); max-width: 32rem; margin-bottom: 1.5rem; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1rem; }

.hero-note { font-size: 0.9rem; color: var(--muted); }

.game-preview {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 50px #0008;
}

.preview-bar {
  height: 28px;
  background: #0f172a;
  border-bottom: 1px solid var(--border);
}

.preview-scene {
  height: 200px;
  background: linear-gradient(180deg, #0d1f0d 0%, #1a3a1a 100%);
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  padding: 1.5rem;
  font-size: 3rem;
}

.preview-caption {
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
}

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

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
}

.feature-icon { font-size: 1.75rem; display: block; margin-bottom: 0.5rem; }

.feature-card h3 { margin-bottom: 0.35rem; font-size: 1.05rem; }

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

.auth-section {
  max-width: 420px;
  margin: 0 auto 4rem;
  padding: 0 2rem;
}

.auth-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.auth-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.auth-tab {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
}

.auth-tab.active {
  background: #1e3a5f;
  color: var(--text);
  border-color: var(--accent2);
}

.auth-form label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.75rem 0 0.25rem;
}

.auth-form label .hint { font-weight: normal; opacity: 0.8; }

.auth-form input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #0a1020;
  color: var(--text);
  font-size: 1rem;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.auth-form.hidden, .logged-in-box.hidden { display: none; }

.auth-error { color: var(--danger); font-size: 0.9rem; margin-top: 0.75rem; }
.auth-success { color: var(--accent); font-size: 0.9rem; margin-top: 0.75rem; }

.logged-in-box { text-align: center; }
.logged-in-box p { margin-bottom: 0.5rem; }
.logged-in-sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 1rem !important; }

.guest-link {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.guest-link a { color: var(--accent); }

.footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.footer a { color: var(--accent); }