:root {
    color-scheme: dark;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #0b1220;
    color: #f8fafc;
    font-family: Arial, sans-serif;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 14px 28px 28px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 28px;
}

h1 {
    margin: 0;
    color: #4ade80;
    font-size: 44px;
}

.subtitle {
    margin-top: 6px;
    color: #94a3b8;
    font-size: 18px;
}

#system-status {
    color: #86efac;
    font-size: 15px;
    padding-top: 8px;
}

.owner-screen {
    padding: 24px;
    margin-bottom: 24px;
    background: #111827;
    border: 1px solid #253047;
    border-radius: 18px;
}

.owner-screen h2 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 28px;
}

.owner-screen p {
    margin: 0;
    color: #cbd5e1;
    font-size: 17px;
}

.dashboard {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.nav-card {
    padding: 24px;
    background: #111827;
    border: 1px solid #253047;
    border-radius: 18px;
    min-height: 180px;
}

.nav-card-active {
    grid-column: 1 / -1;
}

.nav-card h2 {
    margin: 0 0 10px;
    font-size: 24px;
}

.nav-card p {
    margin: 0;
    color: #cbd5e1;
    line-height: 1.45;
}

.subgrid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 20px;
}

.subcard {
    padding: 18px;
    background: #172033;
    border: 1px solid #2c3952;
    border-radius: 14px;
}

.subcard strong {
    display: block;
    margin-bottom: 10px;
    font-size: 17px;
}

.metric {
    font-size: 30px;
    font-weight: 700;
    color: #4ade80;
    margin-bottom: 6px;
}

.small {
    margin-top: 8px;
    color: #94a3b8;
    font-size: 14px;
    line-height: 1.4;
}

.muted {
    opacity: 0.68;
}

.badge {
    display: inline-block;
    margin-top: 16px;
    padding: 6px 10px;
    border-radius: 999px;
    background: #1e293b;
    color: #94a3b8;
    font-size: 13px;
}

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

    .nav-card-active {
        grid-column: auto;
    }

    .subgrid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .topbar {
        flex-direction: column;
    }
}

@media (max-width: 560px) {
    .container {
        padding: 16px;
    }

    h1 {
        font-size: 34px;
    }

    .subgrid {
        grid-template-columns: 1fr;
    }

    .nav-card,
    .owner-screen {
        padding: 18px;
    }
}