/* ===== 奥特曼光之战士主题 · 淡蓝风格 ===== */
:root{
  --bg:#eaf4ff; --bg2:#d6ecff;
  --primary:#2c7be9; --primary-d:#1565c0;
  --accent:#ffb703; --accent-d:#fb8500;
  --danger:#e53935; --ok:#2fae4f;
  --card:#ffffff; --text:#1f3a55; --muted:#6b7d8f;
  --line:#cfe3ff; --shadow:0 8px 24px rgba(40,90,170,.18);
  --radius:16px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);font-size:16px;}
body{background:linear-gradient(160deg,var(--bg) 0%,var(--bg2) 100%);min-height:100vh;}
a{text-decoration:none;color:inherit;}
button{font-family:inherit;}

/* ===== 布局 ===== */
#app{display:flex;min-height:100vh;}
.sidebar{width:210px;flex-shrink:0;background:linear-gradient(180deg,#1e3a5f 0%,#2c7be9 100%);color:#eaf3ff;padding:14px 12px;position:fixed;top:0;left:0;bottom:0;overflow-y:auto;z-index:40;box-shadow:4px 0 18px rgba(30,58,95,.25);}
.brand{font-size:22px;font-weight:900;text-align:center;padding:14px 0 18px;border-bottom:1px solid rgba(255,255,255,.18);margin-bottom:10px;text-shadow:0 0 12px rgba(255,221,87,.6);}
.nav-item{display:block;width:100%;text-align:left;padding:12px 14px;border-radius:12px;font-size:16px;font-weight:700;color:#dceeff;margin-bottom:6px;cursor:pointer;border:none;background:transparent;transition:.18s;}
.nav-item:hover{background:rgba(255,255,255,.14);}
.nav-item.active{background:linear-gradient(90deg,#ffb703,#fb8500);color:#fff;box-shadow:0 4px 12px rgba(251,133,0,.4);}
.nav-item.game-link{border:1px dashed rgba(255,221,87,.5);}
.nav-item.shop-link{border:1px dashed rgba(255,255,255,.3);}
.nav-item.logout{margin-top:18px;background:rgba(229,57,53,.18);color:#ffd7d5;}
.main{flex:1;margin-left:210px;display:flex;flex-direction:column;min-width:0;}
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:12px 22px;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(40,90,170,.08);}
.page-title{font-size:20px;font-weight:900;color:var(--primary-d);}
.topbar-right{display:flex;align-items:center;gap:18px;}
.stat{display:flex;align-items:center;gap:6px;font-weight:800;font-size:15px;}
.stat-ico{font-size:18px;}
.progress-mini{position:relative;width:84px;height:18px;background:#e2eeff;border-radius:9px;overflow:hidden;}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,#ffb703,#fb8500);transition:width .4s;}
.progress-mini span{position:absolute;left:0;right:0;text-align:center;font-size:11px;line-height:18px;color:#1f3a55;font-weight:700;}
.content{padding:22px;max-width:1100px;width:100%;margin:0 auto;}

/* ===== 通用组件 ===== */
.back-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;border-radius:10px;background:#fff;color:var(--primary-d);font-weight:800;cursor:pointer;box-shadow:var(--shadow);margin-bottom:16px;border:2px solid var(--line);}
.back-btn:hover{background:var(--line);}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:18px;}
.card h2{margin:0 0 6px;font-size:20px;color:var(--primary-d);}
.card p.desc{color:var(--muted);margin:0 0 14px;font-size:14px;}
.grid{display:grid;gap:16px;}
.btn{display:inline-block;padding:10px 20px;border:none;border-radius:12px;font-weight:800;font-size:15px;cursor:pointer;transition:.18s;background:linear-gradient(90deg,#4fa0ff,#2c7be9);color:#fff;box-shadow:0 4px 12px rgba(44,123,233,.3);}
.btn:active{transform:translateY(1px);}
.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;}
.btn.accent{background:linear-gradient(90deg,#ffb703,#fb8500);box-shadow:0 4px 12px rgba(251,133,0,.4);}
.btn.ghost{background:#fff;color:var(--primary-d);border:2px solid var(--line);box-shadow:none;}
.btn.danger{background:linear-gradient(90deg,#ff6b6b,#e53935);}
.tag{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:800;background:#fff3d6;color:#b26a00;}
.tag.done{background:#e2f5e8;color:var(--ok);}
.task-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px;border-radius:12px;background:#f7fbff;border:1px solid var(--line);margin-bottom:10px;}
.task-row .t-info h3{margin:0;font-size:16px;color:var(--primary-d);}
.task-row .t-info p{margin:3px 0 0;font-size:13px;color:var(--muted);}
.task-row .t-actions{display:flex;gap:8px;flex-shrink:0;}
.banner{background:linear-gradient(90deg,#2c7be9,#4fa0ff);color:#fff;border-radius:var(--radius);padding:22px;margin-bottom:18px;box-shadow:var(--shadow);}
.banner h1{margin:0;font-size:24px;}
.banner p{margin:8px 0 0;opacity:.92;}

/* ===== 弹窗 ===== */
.modal{position:fixed;inset:0;background:rgba(20,40,70,.55);display:flex;align-items:center;justify-content:center;z-index:100;padding:18px;}
.modal.hidden{display:none;}
.modal-box{background:#fff;border-radius:20px;padding:26px;max-width:520px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.3);text-align:center;max-height:90vh;overflow-y:auto;}
.modal-box h2{color:var(--accent-d);margin-top:0;}
.modal-close{margin-top:18px;}

/* ===== 输入 / 练习 ===== */
textarea,input[type=text],input[type=number],select{width:100%;padding:10px 12px;border:2px solid var(--line);border-radius:10px;font-size:16px;outline:none;font-family:inherit;}
textarea{min-height:90px;resize:vertical;}
.q-card{padding:14px;border-radius:12px;background:#f7fbff;border:1px solid var(--line);margin-bottom:12px;}
.q-card .q{font-weight:700;margin-bottom:8px;}
.opt{display:block;padding:10px 12px;margin-bottom:6px;border:2px solid var(--line);border-radius:10px;cursor:pointer;}
.opt:hover{background:#eaf3ff;}
.opt.correct{background:#e2f5e8;border-color:var(--ok);}
.opt.wrong{background:#fde2e2;border-color:var(--danger);}
.opt.sel{border-color:var(--primary);background:#eaf3ff;}

/* ===== 商店卡片大图 ===== */
.shop-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px;}
.shop-card{background:#fff;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);border:3px solid var(--line);position:relative;display:flex;flex-direction:column;}
.shop-card.owned{border-color:var(--ok);}
.shop-card.locked .u-img-wrap{filter:grayscale(.6) brightness(.7);}
.shop-card.locked::after{content:'🔒';position:absolute;top:10px;right:12px;font-size:22px;z-index:5;}
.u-img-wrap{position:relative;width:100%;aspect-ratio:3/4;background:linear-gradient(180deg,#dbeeff,#9fc6ff);display:flex;align-items:center;justify-content:center;overflow:hidden;}
.u-img-wrap img{width:100%;height:100%;object-fit:contain;}
.u-svg{width:80%;height:80%;}
.shop-body{padding:12px 14px 16px;text-align:center;}
.shop-body h3{margin:0;font-size:17px;color:var(--primary-d);}
.shop-body .skill{font-size:12px;color:var(--muted);margin:4px 0 10px;min-height:32px;}
.shop-body .shop-desc{font-size:12px;color:#5a6b7a;line-height:1.5;margin:0 0 10px;text-align:left;background:#f4f8ff;border-radius:8px;padding:6px 8px;min-height:20px;}
.price{font-size:15px;font-weight:900;color:var(--accent-d);margin-bottom:8px;}

/* ===== 游戏画布 ===== */
.game-wrap{background:#0a1a2f;border-radius:16px;padding:12px;box-shadow:var(--shadow);}
#gameCanvas{display:block;width:100%;height:auto;background:#0a1a2f;border-radius:10px;touch-action:none;}
.game-hud{display:flex;flex-wrap:wrap;align-items:center;gap:10px;color:#fff;margin-bottom:10px;font-weight:800;}
.game-hud .pill{background:rgba(255,255,255,.12);padding:6px 12px;border-radius:20px;}
.seed-bar{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;}
.seed-slot{background:rgba(255,255,255,.1);border:2px solid rgba(255,255,255,.2);border-radius:12px;padding:8px;width:64px;text-align:center;cursor:pointer;position:relative;color:#fff;}
.seed-slot.sel{border-color:#ffd757;background:rgba(255,215,87,.18);}
.seed-slot .cost{font-size:11px;color:#ffd757;}
.seed-slot.disabled{opacity:.4;cursor:not-allowed;}

/* ===== 响应式 ===== */
.nav-toggle{display:none;position:fixed;top:12px;left:12px;z-index:50;background:#2c7be9;color:#fff;border:none;border-radius:10px;width:44px;height:44px;font-size:22px;box-shadow:var(--shadow);}
@media(max-width:900px){
  .sidebar{transform:translateX(-100%);transition:.25s;width:230px;}
  .sidebar.open{transform:translateX(0);}
  .nav-toggle{display:block;}
  .main{margin-left:0;}
  .content{padding:14px;padding-top:60px;}
  .topbar{padding:10px 14px;flex-wrap:wrap;gap:8px;left:0;}
  .topbar-right{gap:10px;font-size:13px;}
  .progress-mini{width:60px;}
  .shop-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));}
}
.hidden{display:none!important;}