/* ====== 全局 ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0f0f1a; --bg-card: #1a1a2e; --bg-card-hover: #242440;
  --primary: #6c5ce7; --primary-hover: #7d6ff0; --accent: #00d2ff;
  --text: #e0e0e0; --text-dim: #888; --danger: #e74c3c; --success: #2ecc71;
  --radius: 12px; --shadow: 0 4px 20px rgba(0,0,0,.3);
  --font: 'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
}
html, body { width:100%; height:100%; overflow:hidden; font-family:var(--font); background:var(--bg); color:var(--text); }
.page { position:absolute; inset:0; display:flex; flex-direction:column; overflow:auto; }
.hidden { display:none !important; }

.btn { display:inline-flex; align-items:center; justify-content:center; gap:6px; padding:8px 20px; border:none; border-radius:var(--radius); font-size:14px; font-family:inherit; cursor:pointer; transition:all .2s; }
.btn-sm { padding:6px 14px; font-size:13px; }
.btn-full { width:100%; }
.btn-primary { background:var(--primary); color:#fff; }
.btn-primary:hover { background:var(--primary-hover); transform:translateY(-1px); }
.btn-outline { background:transparent; color:var(--text); border:1px solid rgba(255,255,255,.2); }
.btn-outline:hover { border-color:var(--primary); color:var(--primary); }

/* 大厅头部 */
.hall-header { display:flex; align-items:center; justify-content:space-between; padding:16px 24px; background:var(--bg-card); border-bottom:1px solid rgba(255,255,255,.06); flex-shrink:0; }
.hall-header h1 { font-size:22px; font-weight:700; }
.user-bar { display:flex; gap:10px; align-items:center; }
.user-bar-guest, .user-bar-logged { display:flex; gap:8px; align-items:center; }
.user-name { font-weight:600; color:var(--accent); }

/* 速度栏 */
.speed-bar { display:flex; align-items:center; justify-content:center; gap:12px; padding:12px 24px 0; flex-shrink:0; }
.speed-label { font-size:14px; color:var(--accent); font-weight:600; white-space:nowrap; }
.speed-tracks { display:flex; align-items:center; gap:8px; }
.speed-track-label { font-size:11px; color:var(--text-dim); }
.speed-levels { display:flex; gap:2px; }
.speed-lvl { width:30px; height:28px; border:1px solid rgba(255,255,255,.15); border-radius:6px; background:rgba(255,255,255,.04); color:var(--text-dim); font-size:12px; font-family:inherit; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:all .15s; user-select:none; }
.speed-lvl:hover { border-color:var(--primary); color:var(--text); background:rgba(255,255,255,.08); }
.speed-lvl.active { background:var(--primary); border-color:var(--primary); color:#fff; font-weight:700; }
@media (max-width:600px) {
  .speed-bar { padding:8px 12px 0; gap:6px; }
  .speed-lvl { width:26px; height:24px; font-size:11px; }
}

/* 游戏卡片网格 */
.hall-grid { flex:1; overflow-y:auto; display:grid; grid-template-columns:repeat(auto-fill,minmax(170px,1fr)); gap:16px; padding:12px 24px 24px; align-content:start; }
.game-card { background:var(--bg-card); border-radius:var(--radius); padding:24px 16px; text-align:center; cursor:pointer; transition:all .25s; border:1px solid transparent; }
.game-card:hover { background:var(--bg-card-hover); border-color:var(--primary); transform:translateY(-4px); box-shadow:var(--shadow); }
.game-card-icon { font-size:44px; margin-bottom:10px; }
.game-card-name { font-size:16px; font-weight:600; margin-bottom:4px; }
.game-card-best { font-size:12px; color:var(--text-dim); }
.game-card-best span { color:var(--accent); }

/* 模态 */
.modal { position:fixed; inset:0; background:rgba(0,0,0,.7); display:flex; align-items:center; justify-content:center; z-index:1000; }
.modal-card { background:var(--bg-card); border-radius:var(--radius); padding:32px; width:100%; max-width:400px; box-shadow:var(--shadow); position:relative; }
.modal-close { position:absolute; top:10px; right:16px; background:none; border:none; font-size:24px; color:var(--text-dim); cursor:pointer; }
.modal-close:hover { color:var(--text); }
.modal-card h2 { margin-bottom:20px; text-align:center; font-size:20px; }

/* 表单 */
.form-group { margin-bottom:16px; }
.form-group label { display:block; margin-bottom:6px; font-size:13px; color:var(--text-dim); }
.form-group input { width:100%; padding:10px 14px; background:var(--bg); color:var(--text); border:1px solid rgba(255,255,255,.1); border-radius:8px; font-size:15px; outline:none; transition:border .2s; }
.form-group input:focus { border-color:var(--primary); }
.form-error { color:var(--danger); font-size:13px; text-align:center; margin-bottom:12px; }
.auth-switch { text-align:center; margin-top:16px; font-size:13px; color:var(--text-dim); }
.auth-switch a { color:var(--accent); text-decoration:none; }
.auth-switch a:hover { text-decoration:underline; }

/* 游戏结束 */
.game-over-score { font-size:32px; font-weight:700; text-align:center; color:var(--accent); margin-bottom:8px; }
.game-over-best { text-align:center; color:var(--text-dim); margin-bottom:8px; font-size:14px; }
.game-over-msg { text-align:center; color:var(--success); font-size:13px; margin-bottom:12px; }
.game-over-btns { display:flex; gap:12px; justify-content:center; margin-top:16px; }

/* 底部 */
.hall-footer { text-align:center; padding:12px; font-size:12px; color:var(--text-dim); flex-shrink:0; border-top:1px solid rgba(255,255,255,.06); display:flex; gap:20px; justify-content:center; }
.hall-footer a { color:var(--accent); text-decoration:none; cursor:pointer; }

@media (max-width:600px) {
  .hall-header { padding:12px 16px; }
  .hall-header h1 { font-size:17px; }
  .hall-grid { grid-template-columns:repeat(2,1fr); gap:10px; padding:12px; }
  .game-card { padding:16px 10px; }
  .game-card-icon { font-size:34px; }
  .modal-card { margin:16px; max-width:95vw; }
}