:root {
    --app-blue: #255f85;
    --app-ink: #20323f;
    --app-muted: #6a7782;
    --app-bg: #f3f6f8;
    --app-border: #dde5ea;
    --app-success: #148f64;
    --app-danger: #c2413b;
    --app-warning: #b98512;
}

body {
    background: var(--app-bg);
    color: var(--app-ink);
    font-family: Inter, "Segoe UI", Tahoma, Arial, sans-serif;
}

.app-navbar {
    background: var(--app-blue);
}

.app-shell {
    padding: 24px;
}

.page-title {
    font-size: 1.45rem;
    font-weight: 750;
    margin: 0;
}

.page-subtitle {
    color: var(--app-muted);
    margin: 4px 0 0;
}

.panel {
    background: #fff;
    border: 1px solid var(--app-border);
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(32, 50, 63, 0.06);
}

.panel-header {
    align-items: center;
    border-bottom: 1px solid var(--app-border);
    display: flex;
    justify-content: space-between;
    padding: 16px 18px;
}

.panel-body {
    padding: 18px;
}

.metric {
    border: 1px solid var(--app-border);
    border-radius: 8px;
    padding: 14px;
    min-height: 112px;
}

.metric-label {
    color: var(--app-muted);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.metric-value {
    font-size: 1.45rem;
    font-weight: 750;
    margin-top: 8px;
}

.status-pill {
    border-radius: 999px;
    display: inline-flex;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 5px 10px;
}

.status-on,
.status-active {
    background: rgba(20, 143, 100, 0.12);
    color: var(--app-success);
}

.status-off,
.status-inactive {
    background: rgba(194, 65, 59, 0.12);
    color: var(--app-danger);
}

.table > :not(caption) > * > * {
    padding: 0.85rem;
}

.login-page {
    align-items: center;
    display: flex;
    min-height: 100vh;
    padding: 24px;
}

.login-box {
    margin: 0 auto;
    max-width: 420px;
    width: 100%;
}

.chart-frame {
    height: 58vh;
    min-height: 360px;
}

@media (max-width: 768px) {
    .app-shell {
        padding: 14px;
    }

    .panel-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .chart-frame {
        height: 420px;
        min-height: 320px;
    }
}