* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #0f1419;
    --panel: #1a212b;
    --panel-2: #232c38;
    --text: #e6edf3;
    --muted: #8b98a5;
    --accent: #2ea043;
    --border: #2d3743;
    --inflow: #d62728;
    --outflow: #2ca02c;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---------- 顶部导航 ---------- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding: 14px 24px;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand .logo {
    font-size: 22px;
}

.brand h1 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.controls {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.type-switch {
    display: inline-flex;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.type-switch button {
    background: transparent;
    color: var(--muted);
    border: none;
    padding: 7px 16px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.15s, color 0.15s;
}

.type-switch button:hover {
    color: var(--text);
}

.type-switch button.active {
    background: var(--accent);
    color: #fff;
}

.date-label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    font-size: 14px;
}

#date-select {
    background: var(--panel-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 14px;
    cursor: pointer;
}

.status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--muted);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #888;
    display: inline-block;
}

.dot.live {
    background: var(--accent);
    box-shadow: 0 0 0 0 rgba(46, 160, 67, 0.6);
    animation: pulse 1.8s infinite;
}

.dot.offline {
    background: #d62728;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(46, 160, 67, 0.6); }
    70% { box-shadow: 0 0 0 8px rgba(46, 160, 67, 0); }
    100% { box-shadow: 0 0 0 0 rgba(46, 160, 67, 0); }
}

.update-time {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

/* ---------- 图表区 ---------- */
.charts {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 18px 24px;
}

.chart-block {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px 8px;
}

.chart-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
    padding-left: 4px;
}

.chart {
    width: 100%;
    height: 460px;
}

.chart-block.hidden {
    display: none;
}

/* ---------- 页脚 ---------- */
.footer {
    text-align: center;
    color: var(--muted);
    font-size: 12px;
    padding: 14px;
    border-top: 1px solid var(--border);
}

@media (max-width: 760px) {
    .topbar { padding: 12px 14px; }
    .charts { padding: 12px 10px; }
    .chart { height: 360px; }
    .brand h1 { font-size: 16px; }
}