:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --text: #1b1f24;
    --muted: #5b6470;
    --accent: #1f5fbf;
    --accent-text: #ffffff;
    --border: #dde1e6;
    --danger-bg: #fdecec;
    --danger-text: #8a1c1c;
    --warn-bg: #fff6e0;
    --warn-text: #6b4a00;
    --ok-bg: #e6f4ea;
    --ok-text: #1e5b2f;
    --neutral-bg: #eef0f3;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111418;
        --surface: #1a1e24;
        --text: #e7eaee;
        --muted: #9aa3ad;
        --accent: #5b9bf0;
        --accent-text: #0b0e12;
        --border: #2c323a;
        --danger-bg: #3a1616;
        --danger-text: #ffb4b4;
        --warn-bg: #3a2d0c;
        --warn-text: #ffd98a;
        --ok-bg: #143321;
        --ok-text: #9be3b0;
        --neutral-bg: #252a31;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.55;
}

a { color: var(--accent); }

code { font-family: Consolas, "Cascadia Mono", monospace; font-size: 0.92em; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--text); }
.site-nav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.site-nav a { text-decoration: none; color: var(--text); }
.site-nav a:hover { color: var(--accent); }
.inline-form { display: inline; margin: 0; }
.link-button { background: none; border: 0; padding: 0; font: inherit; color: var(--accent); cursor: pointer; }

.emergency-banner { background: var(--danger-bg); color: var(--danger-text); padding: 10px 16px; text-align: center; font-weight: 600; }

.main-content { padding-top: 32px; padding-bottom: 48px; }

.hero { padding: 32px 0 16px; }
.hero h1 { font-size: 2.2rem; margin: 0 0 12px; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }

.button { display: inline-block; background: var(--accent); color: var(--accent-text); border: 0; border-radius: 6px; padding: 10px 18px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.button-secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

.card-grid, .stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 24px; }
.card, .panel, .stat, .auth-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 20px; }
.card h2 { margin-top: 0; font-size: 1.2rem; }
.panel h1, .auth-panel h1 { margin-top: 0; }
.feature-list { padding-left: 20px; }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-value { font-size: 1.8rem; font-weight: 700; }
.stat-label { color: var(--muted); }

.auth-panel { max-width: 420px; margin: 24px auto; }
.auth-panel form { display: flex; flex-direction: column; gap: 6px; }
.auth-panel label { font-weight: 600; margin-top: 8px; }
.auth-panel input { padding: 9px 10px; border: 1px solid var(--border); border-radius: 6px; font: inherit; background: var(--bg); color: var(--text); }
.auth-panel .button { margin-top: 16px; }

.form-errors ul { margin: 0; padding-left: 18px; }
.form-errors:not(:empty) { background: var(--danger-bg); color: var(--danger-text); border-radius: 6px; padding: 10px 12px; }
.validation-summary-valid { display: none; }
.field-error { color: var(--danger-text); font-size: 0.9rem; }

.warning-box { background: var(--warn-bg); color: var(--warn-text); border-radius: 6px; padding: 12px; margin-top: 12px; }
.muted { color: var(--muted); }

.site-footer { border-top: 1px solid var(--border); padding: 20px 0; color: var(--muted); font-size: 0.9rem; }

/* Device management */
.panel + .panel, .panel + .stat-grid, .stat-grid + .panel { margin-top: 16px; }
.panel-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.panel-header h1 { margin: 0; }
.small { font-size: 0.85rem; }
.table-wrap { overflow-x: auto; margin-top: 12px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.data-table th, .data-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table th { color: var(--muted); font-weight: 600; }
.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.status { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.85rem; font-weight: 600; background: var(--neutral-bg); color: var(--muted); }
.status-online { background: var(--ok-bg); color: var(--ok-text); }
.status-degraded { background: var(--warn-bg); color: var(--warn-text); }
.status-offline { background: var(--danger-bg); color: var(--danger-text); }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 16px 0 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }
pre.code, pre.secret { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; font-family: Consolas, "Cascadia Mono", monospace; }
pre.secret { font-size: 1.05rem; font-weight: 600; }
.action-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.button-danger { background: var(--danger-text); color: var(--surface); }
.data-table .button { padding: 6px 14px; font-size: 0.9rem; }
code.hash { font-size: 0.85rem; }