:root {
    --bg: #0f1418;
    --panel: #151d23;
    --panel-2: #1d2830;
    --text: #edf4f0;
    --muted: #9caeaa;
    --line: #2d3b44;
    --accent: #18aeea;
    --accent-dark: #0c82bd;
    --danger: #ef4444;
    --warning: #f59e0b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Segoe UI, Arial, sans-serif;
}

a { color: inherit; text-decoration: none; }

.topbar {
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    background: #111a20;
    border-bottom: 1px solid var(--line);
}

.topbar strong { display: block; font-size: 18px; color: var(--accent); }
.topbar span { color: var(--muted); font-size: 12px; }
.topbar nav { display: flex; gap: 10px; }
.topbar nav a {
    padding: 9px 12px;
    border-radius: 6px;
    background: var(--panel-2);
    color: var(--muted);
}
.topbar nav a:hover { color: var(--text); }

.container { max-width: 1180px; margin: 0 auto; padding: 28px; }
.login { max-width: 420px; margin: 72px auto; }
.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 22px;
}

.heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

h1, h2 { margin: 0; }
h1 { font-size: 24px; }
h2 { font-size: 18px; }
.muted { color: var(--muted); }

.grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.metric {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px;
}

.metric strong { display: block; font-size: 28px; margin-top: 8px; }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 13px 14px;
    text-align: left;
    border-bottom: 1px solid var(--line);
    vertical-align: middle;
}

th { color: var(--muted); font-size: 12px; text-transform: uppercase; }
tr:last-child td { border-bottom: 0; }

.badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 0 9px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}

.ok { background: rgba(24, 174, 234, .14); color: var(--accent); }
.off { background: rgba(156, 174, 170, .14); color: var(--muted); }
.bad { background: rgba(239, 68, 68, .14); color: var(--danger); }
.warn { background: rgba(245, 158, 11, .14); color: var(--warning); }

label { display: block; color: var(--muted); margin-bottom: 7px; }
input, select {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 0 12px;
    background: #0b1014;
    color: var(--text);
}

.field { margin-bottom: 14px; }
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 42px;
    padding: 0 16px;
    border: 0;
    border-radius: 6px;
    background: var(--accent);
    color: #061018;
    font-weight: 800;
    cursor: pointer;
}

.alert {
    border-radius: 6px;
    padding: 12px 14px;
    margin-bottom: 16px;
    background: var(--panel-2);
    border: 1px solid var(--line);
}

.alert-error { color: #fecaca; border-color: rgba(239, 68, 68, .4); }
.alert-success { color: #bae6fd; border-color: rgba(24, 174, 234, .4); }

@media (max-width: 860px) {
    .topbar { align-items: flex-start; flex-direction: column; gap: 14px; padding: 18px; }
    .topbar nav { flex-wrap: wrap; }
    .container { padding: 18px; }
    .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    table { display: block; overflow-x: auto; white-space: nowrap; }
}