:root {
    color-scheme: light dark;
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #475569;
    --accent: #0284c7;
    --ok: #16a34a;
    --warn: #d97706;
    --fail: #dc2626;
    --track: rgba(148, 163, 184, 0.25);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1220;
        --card: #0f172a;
        --border: #1f2a44;
        --text: #e2e8f0;
        --muted: #94a3b8;
        --accent: #38bdf8;
        --track: rgba(148, 163, 184, 0.2);
    }
}

* { box-sizing: border-box; }

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

.page { max-width: 1100px; margin: 0 auto; padding: 0 24px 48px; }

.topbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 28px;
}

.brand { font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; }
.mainnav { display: flex; gap: 16px; margin-left: 8px; }
.mainnav a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 14px; }
.mainnav a:hover { color: var(--text); }
.spacer { flex: 1; }
.user { color: var(--muted); font-size: 14px; }
.link-button { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }
.logout-form { display: inline; }

h1 { font-size: 30px; margin: 8px 0 12px; }
h2 { font-size: 18px; margin: 26px 0 12px; }
.lead { color: var(--muted); margin-bottom: 22px; }
.crumb { margin: 0 0 6px; }
.crumb a { color: var(--accent); text-decoration: none; }
.article-title { word-break: break-word; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px 22px;
    max-width: 560px;
}
.card.error { border-color: color-mix(in srgb, var(--fail) 45%, var(--border)); }

.ok { color: var(--ok); font-weight: 600; }
.warn { color: var(--warn); font-weight: 600; }
.fail { color: var(--fail); font-weight: 600; margin: 0; }
.detail { color: var(--muted); font-size: 13px; margin: 8px 0 0; word-break: break-word; }

/* Summary chips */
.chips { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.chip {
    display: inline-flex; align-items: baseline; gap: 8px;
    padding: 8px 14px; border-radius: 999px;
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.chip-label { color: var(--muted); font-size: 13px; }
.chip-value { font-weight: 700; font-variant-numeric: tabular-nums; }

/* Tables — data-grid look: zebra rows, hover, sticky compact headers */
.table-wrap { overflow: auto; max-height: 70vh; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
.grid { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
.grid th, .grid td { padding: 9px 14px; text-align: left; vertical-align: middle; border-bottom: 1px solid var(--border); }
.grid td { border-bottom-color: color-mix(in srgb, var(--border) 55%, transparent); }
.grid th {
    position: sticky; top: 0; z-index: 1;
    font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
    color: var(--muted); background: var(--card);
    border-bottom: 2px solid var(--border);
    white-space: nowrap; user-select: none;
}
.grid tbody tr:nth-child(even) { background: color-mix(in srgb, var(--track) 40%, transparent); }
.grid tbody tr:hover { background: color-mix(in srgb, var(--accent) 9%, transparent); }
.grid tbody tr:last-child td { border-bottom: none; }
.grid .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.grid .article { font-weight: 600; }
.bar-col { min-width: 220px; }

/* Sortable headers (site.js) */
.grid th.sortable { cursor: pointer; }
.grid th.sortable:hover { color: var(--text); }
.grid th.sortable::after { content: "↕"; margin-left: 6px; opacity: 0.35; font-size: 10px; }
.grid th.sort-asc::after { content: "▲"; opacity: 1; color: var(--accent); }
.grid th.sort-desc::after { content: "▼"; opacity: 1; color: var(--accent); }

/* Filter box injected above enhanced tables (site.js) */
.table-filter {
    display: block; width: 100%; max-width: 380px; margin: 0 0 10px;
    padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
    background: var(--card); color: var(--text); font-size: 14px;
}
.table-filter:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); border-color: var(--accent); }

/* Pass-rate bar */
.bar { display: inline-block; width: 150px; height: 8px; border-radius: 999px; background: var(--track); overflow: hidden; vertical-align: middle; }
.bar-fill { height: 100%; border-radius: 999px; }
.bar-good { background: var(--ok); }
.bar-warn { background: var(--warn); }
.bar-bad { background: var(--fail); }
.bar-value { margin-left: 10px; font-variant-numeric: tabular-nums; font-size: 13px; }

.btn {
    display: inline-block; padding: 6px 14px; border-radius: 10px;
    background: var(--accent); color: #fff; text-decoration: none; font-size: 13px; font-weight: 600;
}
.btn-sm {
    display: inline-block; padding: 5px 12px; border-radius: 8px;
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent); text-decoration: none; font-size: 13px; font-weight: 600;
    border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.note { color: var(--warn); font-size: 13px; margin: 6px 0; }
.row-active { background: color-mix(in srgb, var(--accent) 10%, transparent); }

/* Serial search */
.search { display: flex; gap: 10px; margin-bottom: 22px; max-width: 520px; }
.search input { flex: 1; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); color: var(--text); }
.search button { padding: 10px 18px; border: none; border-radius: 8px; background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; }

/* Tabs */
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin: 18px 0; }
.tab { padding: 10px 16px; text-decoration: none; color: var(--muted); font-weight: 600; border-bottom: 2px solid transparent; }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

/* Date range form */
.daterange { display: flex; flex-wrap: wrap; align-items: end; gap: 12px; margin-bottom: 20px; }
.daterange label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.daterange input { padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); color: var(--text); }
.daterange button { padding: 9px 16px; border: none; border-radius: 8px; background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; }

/* KPI cards */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.kpi-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; display: flex; flex-direction: column; gap: 6px; }
.kpi-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.kpi-value { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; margin-top: 4px; padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; width: fit-content; }
.badge-ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.badge-warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 14%, transparent); }
.window { color: var(--muted); font-size: 14px; margin: 16px 0; }

/* Pass/fail split */
.split { max-width: 560px; margin-top: 10px; }
.split-bar { display: flex; height: 14px; border-radius: 999px; overflow: hidden; background: var(--track); }
.split-pass { background: var(--ok); }
.split-fail { background: var(--fail); }
.split-legend { display: flex; gap: 16px; margin-top: 8px; font-size: 13px; }

.daily-table { margin-top: 20px; }
.daily-table summary { cursor: pointer; color: var(--accent); font-weight: 600; margin-bottom: 10px; }

/* Interactive charts (uPlot; see site.js) */
.uchart {
    background: var(--card); border: 1px solid var(--border); border-radius: 12px;
    padding: 12px 10px 6px; margin: 8px 0 4px;
}
.uchart .u-legend { font-size: 12px; color: var(--muted); }
.uchart .u-legend th { font-weight: 600; }
.uchart .u-legend .u-value { font-variant-numeric: tabular-nums; }
.uchart .u-select { background: color-mix(in srgb, var(--accent) 18%, transparent); }
.chart-hint { color: var(--muted); font-size: 12px; margin: 2px 0 14px; }

/* Select inputs share the date-input look */
.daterange select {
    padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
    background: var(--card); color: var(--text); max-width: 420px;
}

/* Overview executive summary */
.summary-line { max-width: 760px; color: var(--muted); line-height: 1.55; margin: 4px 0 18px; }

/* Diagnostics findings */
.findings { display: flex; flex-direction: column; gap: 12px; margin: 16px 0 24px; }
.finding {
    display: flex; gap: 14px; align-items: flex-start;
    background: var(--card); border: 1px solid var(--border);
    border-left: 4px solid var(--border); border-radius: 12px; padding: 14px 18px;
}
.finding-badge {
    flex: 0 0 auto; font-size: 11px; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.05em; padding: 3px 10px; border-radius: 999px; margin-top: 2px;
}
.finding-title { font-weight: 700; margin: 0 0 4px; }
.finding-detail { color: var(--muted); margin: 0; line-height: 1.5; }
.finding-detail a { color: var(--accent); text-decoration: none; margin-left: 6px; }
.finding-critical { border-left-color: var(--fail); }
.finding-critical .finding-badge { color: #fff; background: var(--fail); }
.finding-warning { border-left-color: var(--warn); }
.finding-warning .finding-badge { color: #fff; background: var(--warn); }
.finding-info { border-left-color: var(--accent); }
.finding-info .finding-badge { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }
.finding-good { border-left-color: var(--ok); }
.finding-good .finding-badge { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }

/* Insight card (deterministic measurement summary) */
.insight { max-width: 760px; margin-top: 16px; }
.insight h3 { margin: 0 0 8px; font-size: 15px; }
.insight p { margin: 0 0 10px; line-height: 1.55; }
.insight ul { margin: 0; padding-left: 20px; color: var(--muted); line-height: 1.6; }

/* Test detail grid (serial page) */
.detail-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 12px; background: var(--card); border: 1px solid var(--border);
    border-radius: 12px; padding: 16px 18px; margin: 0 0 18px;
}
.detail-grid div { display: flex; flex-direction: column; gap: 3px; }
.detail-grid dt { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.detail-grid dd { margin: 0; font-weight: 600; word-break: break-word; }
h3 { font-size: 15px; margin: 20px 0 10px; }

/* Portfolio quick links */
.quick-links { white-space: nowrap; }
.quick-links a { margin-left: 6px; }