html,
body {
    margin: 0;
    padding: 0;
    background: transparent;
    color: #ffffff;
    font-family: Inter, Arial, sans-serif;
}

.battery-widget {
    min-height: 100vh;
    box-sizing: border-box;
    padding: 24px;
    background:
        radial-gradient(circle at top left, rgba(125,211,252,0.10), transparent 420px),
        #0f1724;
}

.battery-header {
    margin-bottom: 24px;
}

.widget-kicker {
    color: #7dd3fc;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 12px;
    margin-bottom: 6px;
}

.battery-header h1 {
    margin: 0;
    font-size: 28px;
}

.battery-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 22px;
}

.hv-stack {
    display: grid;
    gap: 22px;
}

.battery-card {
    background: rgba(255,255,255,0.045);
    border: 1px solid rgba(125,211,252,0.14);
    border-radius: 26px;
    padding: 24px;
    box-sizing: border-box;
}

.battery-card h2 {
    margin: 0 0 22px;
    font-size: 22px;
}

.battery-card h3 {
    margin: 26px 0 14px;
    font-size: 16px;
    color: #cdd7e0;
}

.metric-main {
    margin-bottom: 20px;
}

.metric-main span,
.metric-row span {
    display: block;
    color: #94a3b8;
    font-size: 13px;
    margin-bottom: 4px;
}

.metric-main strong {
    font-size: 44px;
    line-height: 1;
}

.metric-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 0;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.metric-row strong {
    font-size: 16px;
}

.history-chart {
    height: 230px;
    position: relative;
}

@media (max-width: 900px) {
    .battery-grid {
        grid-template-columns: 1fr;
    }

    .metric-main strong {
        font-size: 36px;
    }
}