:root {
    --bg: #0f172a;
    --panel: #111827;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --border: #1f2937;
    --up: #22c55e;
    --degraded: #f59e0b;
    --down: #ef4444;
    --accent: #3b82f6;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", system-ui, sans-serif;
    background: linear-gradient(180deg, #0b1220 0%, #111827 100%);
    color: var(--text);
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    background: rgba(17, 24, 39, 0.9);
}

.topbar h1 { margin: 0 0 .25rem; font-size: 1.5rem; }
.topbar p { margin: 0; color: var(--muted); }

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--muted);
    font-size: .9rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.25rem;
    border-top: 4px solid var(--muted);
}

.card.status-up { border-top-color: var(--up); }
.card.status-degraded { border-top-color: var(--degraded); }
.card.status-down { border-top-color: var(--down); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: .75rem;
}

.card h2 { margin: 0; font-size: 1.1rem; }
.target-url { color: var(--muted); font-size: .9rem; word-break: break-all; }

.badge {
    display: inline-block;
    padding: .25rem .6rem;
    border-radius: 999px;
    background: #1e293b;
    font-size: .75rem;
    font-weight: 600;
}

.badge-small { font-size: .7rem; }

.metrics {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
    display: grid;
    gap: .5rem;
}

.metrics li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: .9rem;
}

.metrics span { color: var(--muted); }

.message {
    margin: .75rem 0;
    font-size: .85rem;
    color: var(--muted);
}

.uptime-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .75rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.uptime-row small {
    display: block;
    color: var(--muted);
    margin-bottom: .25rem;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.panel h2 { margin-top: 0; font-size: 1.1rem; }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: .85rem;
}

th, td {
    padding: .65rem .5rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th { color: var(--muted); font-weight: 600; }

.empty { color: var(--muted); }

.btn-secondary {
    display: inline-block;
    padding: .5rem .85rem;
    border-radius: 8px;
    background: #1e293b;
    color: var(--text);
    border: 0;
    font: inherit;
    cursor: pointer;
    text-decoration: none;
}

.topbar-actions .btn-secondary {
    width: auto;
}

.btn-secondary:disabled {
    opacity: .6;
    cursor: wait;
}

.alert-feedback {
    max-width: 1200px;
    margin: 1rem auto 0;
    padding: .85rem 1.25rem;
    border-radius: 8px;
    font-size: .9rem;
}

.alert-feedback.alert-success {
    background: rgba(34, 197, 94, 0.15);
    color: #bbf7d0;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.alert-feedback.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: #fecaca;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.login-page {
    display: grid;
    place-items: center;
    padding: 2rem;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 2rem;
}

.login-card h1 { margin-top: 0; }
.subtitle { color: var(--muted); margin-top: -.5rem; }

label {
    display: block;
    margin-bottom: 1rem;
    font-size: .9rem;
}

input {
    width: 100%;
    margin-top: .35rem;
    padding: .7rem .8rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #0b1220;
    color: var(--text);
}

button {
    width: 100%;
    padding: .75rem;
    border: 0;
    border-radius: 8px;
    background: var(--accent);
    color: white;
    font-weight: 600;
    cursor: pointer;
}

.alert {
    padding: .75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: .9rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: #fecaca;
}

.refresh-countdown {
    font-size: .85rem;
    color: var(--muted);
}

@media (max-width: 640px) {
    .topbar { flex-direction: column; align-items: flex-start; }
    .container { padding: 1rem; }
}