/* lab.css */
:root {
    --bg-dark: #0f172a;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --green: #10b981;
    --border-color: rgba(255, 255, 255, 0.1);
}

body {
    margin: 0;
    font-family: 'PingFang SC', sans-serif;
    background: var(--bg-dark) radial-gradient(circle at top right, #1e293b, transparent 40%);
    color: var(--text-main);
    min-height: 100vh;
}

/* 导航栏 */
.lab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo a { color: var(--text-dim); text-decoration: none; font-weight: bold; }
.logo a:hover { color: var(--text-main); }

.user-status { display: flex; align-items: center; gap: 20px; font-weight: 600; }
.text-green { color: var(--green); }
.text-blue { color: var(--primary); }
.avatar-box { font-size: 24px; background: #334155; border-radius: 50%; width: 40px; height: 40px; display: grid; place-items: center; border: 2px solid transparent; transition: 0.3s;}
.avatar-box.premium { border-color: #fbbf24; box-shadow: 0 0 10px rgba(251, 191, 36, 0.5); }

/* 核心网格布局 */
.dashboard-grid {
    display: grid;
    grid-template-columns: 300px 1fr 320px;
    gap: 20px;
    padding: 30px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(12px);
}

.panel-header {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 15px;
    color: var(--text-main);
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.mt-20 { margin-top: 20px; }
.sub-text { font-size: 13px; color: var(--text-dim); margin-bottom: 15px; }

/* 按钮通用样式 */
button { cursor: pointer; border: none; border-radius: 8px; font-weight: bold; transition: 0.2s; }
.btn-primary { background: var(--primary); color: white; padding: 10px; width: 100%; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: #475569; color: white; padding: 10px; width: 100%; }
.btn-trade { background: rgba(59, 130, 246, 0.2); color: var(--primary); padding: 8px; width: 100%; border: 1px solid rgba(59, 130, 246, 0.5); }
.btn-trade:hover { background: var(--primary); color: white; }
.btn-outline { background: transparent; border: 1px solid var(--text-dim); color: var(--text-dim); padding: 5px 15px; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* 左侧：市场行情 */
.coin-card { background: rgba(255,255,255,0.03); border-radius: 12px; padding: 15px; margin-bottom: 15px; text-align: center; }
.coin-name { font-size: 14px; color: var(--text-dim); }
.coin-price { font-size: 20px; font-weight: bold; margin: 10px 0; color: var(--text-main); }

/* 中间：视频与任务 */
.video-placeholder { background: #000; height: 180px; border-radius: 12px; display: flex; flex-direction: column; justify-content: center; align-items: center; cursor: pointer; border: 1px solid #334155; transition: 0.3s; }
.video-placeholder:hover { border-color: var(--primary); box-shadow: 0 0 15px rgba(59, 130, 246, 0.3); }

.task-list { display: flex; flex-direction: column; gap: 15px; }
.task-item { background: rgba(255,255,255,0.03); padding: 15px; border-radius: 12px; display: flex; justify-content: space-between; align-items: center; }
.task-item p { font-size: 12px; color: var(--text-dim); margin: 5px 0 0; }

/* 右侧：列表与商城 */
.holdings-list, .rank-list { list-style: none; padding: 0; margin: 0; }
.holdings-list li { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--border-color); color: var(--text-dim); }

.rank-list li { display: flex; align-items: center; justify-content: space-between; padding: 12px; background: rgba(255,255,255,0.02); border-radius: 8px; margin-bottom: 8px; font-size: 14px; }
.rank-list li .rank-num { font-weight: bold; width: 20px; color: var(--text-dim); }
.rank-list li:nth-child(1) .rank-num { color: #fbbf24; }
.rank-list li:nth-child(2) .rank-num { color: #94a3b8; }
.rank-list li:nth-child(3) .rank-num { color: #d97706; }

.store-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.store-item { background: rgba(255,255,255,0.05); padding: 15px 5px; border-radius: 10px; text-align: center; cursor: pointer; transition: 0.2s; border: 1px solid transparent; }
.store-item:hover { background: rgba(255,255,255,0.1); border-color: var(--primary); }
.store-item .icon { font-size: 24px; margin-bottom: 5px; }
.store-item .name { font-size: 12px; font-weight: bold; margin-bottom: 5px; }
.store-item .price { font-size: 12px; color: #fbbf24; }

/* 交易表单与弹窗 */
.trade-form input { width: 100%; padding: 12px; background: rgba(0,0,0,0.2); border: 1px solid var(--border-color); color: white; border-radius: 8px; margin-bottom: 10px; box-sizing: border-box; }
.trade-info { font-size: 14px; color: var(--text-dim); margin-bottom: 15px; }
.btn-group { display: flex; gap: 10px; }
.hidden { display: none; }

.tutorial-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.85); display: none; place-items: center; z-index: 1000; backdrop-filter: blur(5px); }
.tutorial-overlay.active { display: grid; }
.tutorial-box { background: var(--bg-dark); padding: 40px; border-radius: 16px; border: 1px solid var(--primary); text-align: center; max-width: 450px; }