*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0d0f1a; --card: #151929; --border: #1e2540;
  --accent: #6c63ff; --accent2: #00d4ff; --text: #e8eaf6;
  --muted: #8892b0; --danger: #ff4d6d; --success: #43e97b;
}
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* AUTH PAGE */
.auth-page { display:flex; align-items:center; justify-content:center; min-height:100vh;
  background: radial-gradient(ellipse at 50% 0%, #1a1560 0%, var(--bg) 70%); }
.auth-box { background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 40px; width: 100%; max-width: 420px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.auth-logo { text-align:center; margin-bottom:32px; }
.auth-logo h1 { font-size:2.4rem; font-weight:800;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.auth-logo p { color:var(--muted); font-size:0.9rem; margin-top:4px; }
.tabs { display:flex; gap:0; margin-bottom:28px; border-radius:10px; overflow:hidden;
  border: 1px solid var(--border); }
.tab { flex:1; padding:12px; text-align:center; cursor:pointer; font-weight:600;
  font-size:0.9rem; color:var(--muted); background:transparent; border:none;
  transition: all 0.2s; }
.tab.active { background: var(--accent); color: white; }
.form-group { margin-bottom:18px; }
.form-group label { display:block; font-size:0.85rem; color:var(--muted); margin-bottom:6px; }
.form-group input { width:100%; padding:12px 16px; background:#1a1f36; border:1px solid var(--border);
  border-radius:10px; color:var(--text); font-size:1rem; outline:none; transition: border 0.2s; }
.form-group input:focus { border-color: var(--accent); }
.btn { width:100%; padding:14px; border:none; border-radius:10px; font-size:1rem; font-weight:700;
  cursor:pointer; transition: all 0.2s; margin-top:8px; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color:white; }
.btn-primary:hover { opacity:0.9; transform:translateY(-1px); }
.msg { padding:10px 14px; border-radius:8px; font-size:0.85rem; margin-bottom:14px; display:none; }
.msg.error { background:#ff4d6d22; border:1px solid var(--danger); color:var(--danger); }
.msg.success { background:#43e97b22; border:1px solid var(--success); color:var(--success); }

/* LOBBY */
.navbar { background:var(--card); border-bottom:1px solid var(--border);
  padding:0 32px; height:64px; display:flex; align-items:center; justify-content:space-between; }
.navbar-logo { font-size:1.4rem; font-weight:800;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.navbar-user { display:flex; align-items:center; gap:12px; }
.user-chip { background:#1a1f36; border:1px solid var(--border); border-radius:20px;
  padding:6px 16px; font-size:0.88rem; }
.coins-badge { background:linear-gradient(135deg,#f7971e,#ffd200); color:#111;
  border-radius:20px; padding:6px 14px; font-weight:700; font-size:0.88rem; }
.logout-btn { background:transparent; border:1px solid var(--border); color:var(--muted);
  border-radius:8px; padding:6px 14px; cursor:pointer; font-size:0.85rem; }
.lobby-main { max-width:1100px; margin:0 auto; padding:40px 20px; }
.lobby-header { margin-bottom:32px; }
.lobby-header h2 { font-size:1.8rem; font-weight:800; }
.lobby-header p  { color:var(--muted); margin-top:6px; }
.games-grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap:24px; }
.game-card { background:var(--card); border:1px solid var(--border); border-radius:16px;
  overflow:hidden; transition: transform 0.2s, box-shadow 0.2s; cursor:pointer; }
.game-card:hover { transform:translateY(-4px); box-shadow: 0 12px 40px rgba(108,99,255,0.25); }
.game-thumb { height:160px; background:linear-gradient(135deg,#1a1060,#0d1f4f);
  display:flex; align-items:center; justify-content:center; font-size:4rem; }
.game-info { padding:20px; }
.game-info h3 { font-size:1.1rem; font-weight:700; margin-bottom:6px; }
.game-info p  { color:var(--muted); font-size:0.85rem; margin-bottom:12px; }
.game-tags { display:flex; gap:6px; flex-wrap:wrap; margin-bottom:14px; }
.tag { background:#1a1f36; border:1px solid var(--border); border-radius:12px;
  padding:3px 10px; font-size:0.75rem; color:var(--muted); }
.play-btn { display:block; width:100%; padding:10px; text-align:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:white; border-radius:10px; font-weight:700; font-size:0.9rem; }
.leaderboard { background:var(--card); border:1px solid var(--border); border-radius:16px; padding:24px; }
.leaderboard h3 { font-size:1rem; font-weight:700; margin-bottom:16px; }
.lb-row { display:flex; align-items:center; gap:12px; padding:10px 0;
  border-bottom:1px solid var(--border); }
.lb-row:last-child { border-bottom:none; }
.lb-rank { width:28px; height:28px; border-radius:50%; display:flex; align-items:center;
  justify-content:center; font-weight:800; font-size:0.85rem;
  background:#1a1f36; color:var(--muted); flex-shrink:0; }
.lb-rank.gold   { background:#f7971e; color:#111; }
.lb-rank.silver { background:#aaa; color:#111; }
.lb-rank.bronze { background:#cd7f32; color:#111; }
.lb-name { flex:1; font-size:0.9rem; }
.lb-score { font-weight:700; color:var(--accent2); font-size:0.9rem; }