:root {
    --clr-bg:       #f8f9fa;
    --clr-surface:  #ffffff;
    --clr-border:   #dee2e6;
    --clr-text:     #212529;
    --clr-muted:    #6c757d;
    --clr-primary:  #0d6efd;
    --clr-warn:     #fd7e14;
    --clr-danger:   #dc3545;
    --clr-ok:       #198754;
    --clr-flag-bg:  #fff3cd;
    --clr-out-low:  #cfe2ff;
    --clr-out-high: #f8d7da;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, sans-serif;
    font-size: 0.9rem;
    background: var(--clr-bg);
    color: var(--clr-text);
}

header {
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

header h1 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

header a { color: var(--clr-muted); text-decoration: none; font-size: 0.85rem; }
header a:hover { color: var(--clr-primary); }

main { padding: 1.5rem; max-width: 1200px; margin: 0 auto; }

.card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: 6px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.card h2 { margin: 0 0 1rem; font-size: 1rem; font-weight: 600; }
.card h3 { margin: 0 0 0.75rem; font-size: 0.9rem; font-weight: 600; color: var(--clr-muted); }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

th, td {
    padding: 0.35rem 0.6rem;
    border: 1px solid var(--clr-border);
    text-align: center;
}

th {
    background: var(--clr-bg);
    font-weight: 600;
    white-space: nowrap;
}

td.label { text-align: left; font-weight: 500; }

.flag-low   { background: var(--clr-out-low);  }
.flag-high  { background: var(--clr-out-high); }
.flag-bias  { background: var(--clr-flag-bg);  }
.flag-alert { color: var(--clr-danger); font-weight: 700; }
.ok         { color: var(--clr-ok); }
.muted      { color: var(--clr-muted); font-size: 0.78rem; }

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-warn   { background: #fff3cd; color: #664d03; }
.badge-danger { background: #f8d7da; color: #842029; }
.badge-ok     { background: #d1e7dd; color: #0a3622; }

.form-row { margin-bottom: 0.75rem; }
.form-row label { display: block; margin-bottom: 0.25rem; font-weight: 500; }
.form-row input, .form-row select {
    width: 100%;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--clr-border);
    border-radius: 4px;
    font-size: 0.9rem;
}

.btn {
    display: inline-block;
    padding: 0.45rem 1rem;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary { background: var(--clr-primary); color: #fff; }
.btn-secondary { background: var(--clr-border); color: var(--clr-text); }

.btn:hover { opacity: 0.88; }

.url-row { display: flex; gap: 0.5rem; margin-bottom: 0.5rem; }
.url-row input { flex: 1; }

.legend { display: flex; gap: 1.25rem; flex-wrap: wrap; margin-top: 0.5rem; }
.legend-item { display: flex; align-items: center; gap: 0.3rem; font-size: 0.78rem; color: var(--clr-muted); }
.legend-swatch { width: 14px; height: 14px; border: 1px solid var(--clr-border); border-radius: 2px; }

.note {
    background: #e7f1ff;
    border-left: 3px solid var(--clr-primary);
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--clr-muted);
    margin-bottom: 1rem;
    border-radius: 0 4px 4px 0;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.88rem;
}

.alert-danger  { background: #f8d7da; color: #842029; border: 1px solid #f5c2c7; }
.alert-success { background: #d1e7dd; color: #0a3622; border: 1px solid #badbcc; }

.section-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--clr-border);
}