/* ===== 全局样式 / 游戏中心外壳 ===== */
:root{
  --bg-1:#0f1226;
  --bg-2:#1a1f3a;
  --panel:rgba(255,255,255,0.06);
  --panel-solid:#1e2440;
  --border:rgba(255,255,255,0.10);
  --text:#e8ecf5;
  --text-dim:#9aa3c0;
  --accent:#6c8cff;
  --accent-2:#a06cff;
  --gold:#ffce5c;
  --ok:#5cd6a8;
  --danger:#ff6b8b;
  --radius:14px;
  --shadow:0 10px 40px rgba(0,0,0,0.4);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;height:100%;}
body{
  font-family:"Segoe UI","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  color:var(--text);
  background:radial-gradient(1200px 800px at 80% -10%,#2a1f5a 0%,transparent 60%),
             radial-gradient(1000px 700px at -10% 110%,#143a5e 0%,transparent 55%),
             linear-gradient(160deg,var(--bg-1),var(--bg-2));
  background-attachment:fixed;
  min-height:100vh;
  overflow:hidden;
}
button{font-family:inherit;cursor:pointer;color:inherit;}

#app{display:flex;flex-direction:column;height:100vh;}

/* 顶部栏 */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 20px;
  background:rgba(15,18,38,0.7);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
  z-index:20;
}
.brand{font-size:20px;font-weight:800;letter-spacing:1px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.topbar-right{display:flex;align-items:center;gap:10px;}
.points-display{
  background:linear-gradient(90deg,#3a2f12,#5a4516);
  border:1px solid #6b5320;
  padding:8px 14px;border-radius:30px;font-weight:700;color:var(--gold);
  box-shadow:0 4px 14px rgba(255,206,92,0.15);
}
#pointsValue{margin-left:4px;}
.topbar-btn{
  background:var(--panel);border:1px solid var(--border);
  padding:8px 14px;border-radius:10px;font-size:14px;
  transition:.18s;
}
.topbar-btn:hover{background:rgba(255,255,255,0.12);border-color:var(--accent);}

/* 布局 */
.layout{flex:1;display:flex;min-height:0;}

/* 侧边栏 */
.sidebar{
  width:230px;flex-shrink:0;
  background:rgba(15,18,38,0.55);
  backdrop-filter:blur(10px);
  border-right:1px solid var(--border);
  padding:16px 12px;display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;
}
.nav-group{margin-bottom:10px;}
.nav-group-title{
  font-size:11px;letter-spacing:1.5px;text-transform:uppercase;
  color:var(--text-dim);padding:8px 10px 4px;
}
.nav-item{
  width:100%;text-align:left;
  background:transparent;border:1px solid transparent;
  padding:11px 12px;border-radius:10px;font-size:15px;
  display:flex;align-items:center;gap:10px;
  transition:.15s;
}
.nav-item:hover{background:var(--panel);}
.nav-item.active{
  background:linear-gradient(90deg,rgba(108,140,255,0.25),rgba(160,108,255,0.15));
  border-color:rgba(108,140,255,0.4);
  box-shadow:inset 0 0 0 1px rgba(108,140,255,0.2);
}
.sidebar-footer{margin-top:auto;padding:12px 10px;font-size:12px;color:var(--text-dim);
  border-top:1px solid var(--border);}
.sidebar-footer span{color:var(--text);font-weight:600;}

/* 游戏区域 */
.game-area{
  flex:1;min-width:0;overflow:auto;
  display:flex;align-items:flex-start;justify-content:center;
  padding:24px;
}
.game-area::-webkit-scrollbar{width:10px;}
.game-area::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.15);border-radius:6px;}

/* 通用面板 */
.panel{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
  backdrop-filter:blur(8px);
}
.btn{
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  border:none;color:#fff;padding:10px 20px;border-radius:10px;font-size:14px;font-weight:600;
  box-shadow:0 6px 18px rgba(108,140,255,0.3);transition:.15s;
}
.btn:hover{filter:brightness(1.1);transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn.ghost{background:var(--panel);border:1px solid var(--border);box-shadow:none;}
.btn.danger{background:linear-gradient(90deg,#ff6b8b,#ff8e5c);}

/* 模态框 */
.modal{
  position:fixed;inset:0;background:rgba(5,7,18,0.65);
  backdrop-filter:blur(6px);
  display:none;align-items:center;justify-content:center;z-index:100;padding:20px;
}
.modal.open{display:flex;}
.modal-content{
  background:linear-gradient(180deg,#20264a,#181d36);
  border:1px solid var(--border);
  border-radius:18px;width:min(640px,94vw);max-height:88vh;overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column;
  animation:pop .2s ease;
}
@keyframes pop{from{transform:scale(.94);opacity:0;}to{transform:scale(1);opacity:1;}}
.modal-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;border-bottom:1px solid var(--border);
}
.modal-header h2{margin:0;font-size:18px;}
.modal-close{
  background:var(--panel);border:1px solid var(--border);
  width:34px;height:34px;border-radius:8px;font-size:16px;
}
.modal-close:hover{background:rgba(255,107,139,0.2);}
.modal-body{padding:18px 20px;overflow-y:auto;}
.modal-tip{color:var(--text-dim);margin-top:0;font-size:14px;}

/* 皮肤商店 */
.shop-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;}
.shop-card{
  background:var(--panel);border:1px solid var(--border);border-radius:12px;
  padding:12px;text-align:center;transition:.15s;
}
.shop-card.selected{border-color:var(--ok);box-shadow:0 0 0 1px var(--ok);}
.shop-card.locked{opacity:.92;}
.shop-preview{
  height:70px;width:100%;border-radius:8px;margin-bottom:10px;
  display:block;background:rgba(0,0,0,0.25);
}
.shop-card .name{font-weight:700;font-size:14px;margin-bottom:4px;}
.shop-card .price{color:var(--gold);font-weight:700;font-size:13px;margin-bottom:8px;}
.shop-card .price.free{color:var(--ok);}
.shop-card .badge{font-size:12px;color:var(--ok);margin-bottom:8px;}
.shop-card .actions{display:flex;gap:6px;justify-content:center;}
.shop-card .btn{padding:7px 14px;font-size:13px;}

/* 音乐 */
.music-controls{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin-bottom:14px;
  padding:12px;background:var(--panel);border-radius:10px;border:1px solid var(--border);}
.switch{display:flex;align-items:center;gap:8px;cursor:pointer;}
.switch input{width:18px;height:18px;}
.volume-label{display:flex;align-items:center;gap:8px;font-size:14px;}
.volume-label input{width:140px;}
.music-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;}
.music-item{
  background:var(--panel);border:1px solid var(--border);border-radius:10px;
  padding:12px;text-align:center;transition:.15s;cursor:pointer;
}
.music-item:hover{background:rgba(255,255,255,0.1);}
.music-item.selected{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent);}
.music-item .icon{font-size:26px;}
.music-item .label{font-size:13px;margin-top:4px;font-weight:600;}
.music-item .playing{font-size:11px;color:var(--ok);margin-top:2px;}

/* Toast */
.toast{
  position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(20px);
  background:rgba(20,24,48,0.95);border:1px solid var(--border);
  padding:12px 22px;border-radius:30px;font-size:14px;font-weight:600;
  box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.3s;z-index:200;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* 响应式 */
@media (max-width:760px){
  .sidebar{width:64px;padding:10px 6px;}
  .nav-item span,.nav-group-title,.sidebar-footer{display:none;}
  .nav-item{justify-content:center;font-size:20px;padding:12px 0;}
  .brand{font-size:16px;}
  .topbar-btn span{display:none;}
  .points-display{font-size:13px;padding:6px 10px;}
}