:root {
  --bg: #0b0f1a;
  --panel: #131a2b;
  --panel-2: #1a2340;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --text: #e6ecff;
  --muted: #8b93b0;
  --danger: #ef4444;
  --success: #22c55e;
  --border: rgba(255,255,255,0.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: 'Inter', system-ui, -apple-system, sans-serif; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11,15,26,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; max-width: 1200px; margin: 0 auto; }
.logo { font-weight: 800; font-size: 22px; letter-spacing: -0.02em; }
.logo span { background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a { color: var(--text); opacity: 0.9; font-size: 14px; }
.btn {
  display: inline-block; padding: 8px 16px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white;
  border: none; font-weight: 600; cursor: pointer; font-size: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(124,92,255,0.35); text-decoration: none; }
.btn-ghost { background: transparent; border: 1px solid var(--border); }

/* Hero */
.hero { padding: 60px 20px 40px; text-align: center; }
.hero h1 { font-size: clamp(32px, 6vw, 56px); margin: 0 0 12px; letter-spacing: -0.03em; line-height: 1.05; }
.hero h1 span { background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--muted); font-size: 18px; max-width: 620px; margin: 0 auto; }

/* Game grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; padding: 20px 0 60px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  overflow: hidden; transition: transform 0.18s ease, border-color 0.18s ease;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.thumb { height: 140px; display: flex; align-items: center; justify-content: center; font-size: 56px; }
.thumb-2048 { background: linear-gradient(135deg, #f6b73c 0%, #ee7752 100%); }
.thumb-snake { background: linear-gradient(135deg, #22c55e 0%, #0ea5e9 100%); }
.thumb-memory { background: linear-gradient(135deg, #a855f7 0%, #ec4899 100%); }
.thumb-tictactoe { background: linear-gradient(135deg, #06b6d4 0%, #7c3aed 100%); }
.thumb-minesweeper { background: linear-gradient(135deg, #64748b 0%, #0f172a 100%); }
.thumb-breakout { background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%); }
.card-body { padding: 14px 16px 18px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 13px; }

/* Game page layout */
.game-page { padding: 24px 0 60px; }
.game-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; flex-wrap: wrap; gap: 12px; }
.game-header h1 { margin: 0; font-size: 26px; }
.game-stage { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 20px; display: flex; flex-direction: column; align-items: center; }
.hud { display: flex; gap: 16px; margin-bottom: 14px; flex-wrap: wrap; justify-content: center; }
.hud .box { background: var(--panel-2); padding: 8px 14px; border-radius: 10px; text-align: center; min-width: 80px; }
.hud .box small { display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; }
.hud .box b { font-size: 20px; }
canvas { background: #0f1424; border-radius: 10px; display: block; touch-action: none; }
.controls { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.controls button { padding: 8px 14px; border-radius: 8px; background: var(--panel-2); color: var(--text); border: 1px solid var(--border); cursor: pointer; }
.controls button:hover { border-color: var(--accent); }

/* Ad slots */
.ad-slot {
  min-height: 90px; margin: 24px auto;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,0.02), rgba(255,255,255,0.02) 10px, rgba(255,255,255,0.04) 10px, rgba(255,255,255,0.04) 20px);
  border: 1px dashed var(--border); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 12px;
}

/* Auth / Admin */
.form { max-width: 400px; margin: 60px auto; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 28px; }
.form h2 { margin: 0 0 18px; }
.form input {
  width: 100%; padding: 12px 14px; margin-bottom: 12px; border-radius: 8px;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text); font-size: 14px;
}
.form input:focus { outline: none; border-color: var(--accent); }
.form .btn { width: 100%; padding: 12px; }
.form .msg { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 18px; }
.form .switch { margin-top: 14px; text-align: center; font-size: 13px; color: var(--muted); }

/* Admin dashboard */
.dash { padding: 30px 0 60px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat small { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.stat b { display: block; font-size: 28px; margin-top: 6px; }
.tbl-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 20px; overflow-x: auto; }
.tbl-wrap h3 { margin: 0 0 12px; font-size: 16px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; }
th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 30px 20px; text-align: center; color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); margin: 0 10px; }

@media (max-width: 600px) {
  .hero { padding: 40px 20px 20px; }
  .nav-links a:not(.btn) { display: none; }
}