:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --up: #16a34a;
    --down: #dc2626;
    --unknown: #6b7280;
    --bg: #f4f6f9;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #1f2937;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
.topbar {
    background: var(--primary);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
}
.topbar .brand { font-weight: 700; font-size: 1.1rem; }
.topbar nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 18px;
    opacity: 0.9;
    font-size: 0.92rem;
}
.topbar nav a:hover { opacity: 1; text-decoration: underline; }

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

h1 { margin-top: 0; }

.auth-box {
    max-width: 400px;
    margin: 60px auto;
    background: var(--card-bg);
    padding: 32px;
    border-radius: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
.auth-box h1 { font-size: 1.3rem; text-align: center; color: var(--primary); }
.auth-box h2 { text-align: center; font-weight: 500; color: #555; margin-top: 0; }

label {
    display: block;
    margin-bottom: 14px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
}
label input[type=checkbox] { width: auto; margin-right: 6px; }
input[type=text], input[type=email], input[type=password], input[type=url], input[type=number], select {
    display: block;
    width: 100%;
    padding: 9px 11px;
    margin-top: 5px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 400;
}
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.row > label { flex: 1; min-width: 200px; }

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--primary-dark); }
.btn-secondary { background: #6b7280; }
.btn-secondary:hover { background: #4b5563; }

.flash { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 0.92rem; }
.flash-success { background: #dcfce7; color: #166534; }
.flash-error { background: #fee2e2; color: #991b1b; }
.flash-warning { background: #fef9c3; color: #854d0e; }

.stat-cards { display: flex; gap: 16px; margin-bottom: 28px; }
.stat-card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 18px 24px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    flex: 1;
    text-align: center;
}
.stat-num { display: block; font-size: 2rem; font-weight: 700; }
.stat-label { color: #6b7280; font-size: 0.85rem; }
.stat-up .stat-num { color: var(--up); }
.stat-down .stat-num { color: var(--down); }

.section-head { display: flex; justify-content: space-between; align-items: center; margin: 28px 0 12px; }

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.table th, .table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}
.table th { background: #f9fafb; font-weight: 600; color: #374151; }
.table .actions a { margin-right: 10px; font-size: 0.85rem; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
}
.badge-up { background: var(--up); }
.badge-down { background: var(--down); }
.badge-unknown { background: var(--unknown); }
.badge-muted { background: #d1d5db; color: #4b5563; }

fieldset {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px 20px;
    margin-bottom: 18px;
}
legend { font-weight: 700; color: var(--primary); padding: 0 6px; }
.hint { font-size: 0.82rem; color: #6b7280; margin: -6px 0 14px; }
code { background: #f1f5f9; padding: 1px 5px; border-radius: 4px; }

.site-footer { text-align: center; color: #9ca3af; font-size: 0.8rem; padding: 24px; }