:root {
    --bg-primary: #f1f5f9;
    --bg-secondary: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #2563eb;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --success-dim: rgba(22, 163, 74, 0.08);
    --warning-dim: rgba(217, 119, 6, 0.08);
    --danger-dim: rgba(220, 38, 38, 0.08);
    --accent-dim: rgba(37, 99, 235, 0.08);
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    line-height: 1.5;
}

/* ── Header ── */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.875rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.01em;
}

.app-logo:hover {
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: #fff;
    flex-shrink: 0;
}

.header-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

/* ── Stats cards ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-card.stat-total {
    border-left: 3px solid var(--accent);
}

.stat-card.stat-ok {
    border-left: 3px solid var(--success);
}

.stat-card.stat-warn {
    border-left: 3px solid var(--warning);
}

.stat-card.stat-error {
    border-left: 3px solid var(--danger);
}

.stat-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.03em;
}

.stat-total .stat-value {
    color: var(--accent);
}

.stat-ok .stat-value {
    color: var(--success);
}

.stat-warn .stat-value {
    color: var(--warning);
}

.stat-error .stat-value {
    color: var(--danger);
}

/* ── Monitor table wrapper ── */
.monitor-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.monitor-card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.monitor-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ── Table ── */
.monitor-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
    font-size: 0.875rem;
}

.monitor-table thead th {
    padding: 0.75rem 1.25rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.02);
    white-space: nowrap;
}

.monitor-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background 0.15s ease;
}

.monitor-table tbody tr:last-child {
    border-bottom: none;
}

.monitor-table tbody tr:hover {
    background: rgba(0, 0, 0, 0.025);
}

.monitor-table td {
    padding: 1rem 1.25rem;
    vertical-align: middle;
    border: none;
    color: var(--text-primary);
}

.site-name {
    font-weight: 500;
    color: var(--text-primary);
}

/* ── Domain ── */
.domain-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    max-width: 260px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.domain-link:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

.redirect-warning {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.75rem;
    color: var(--warning);
    background: var(--warning-dim);
    border: 1px solid rgba(245, 158, 11, 0.2);
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
    margin-top: 0.375rem;
    word-break: break-all;
}

/* ── Status badge ── */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.3125rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.badge-ok {
    background: var(--success-dim);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.badge-ok .status-dot {
    background: var(--success);
    animation: pulse-green 2s ease infinite;
}

.badge-warn {
    background: var(--warning-dim);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-warn .status-dot {
    background: var(--warning);
}

.badge-error {
    background: var(--danger-dim);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-error .status-dot {
    background: var(--danger);
    animation: pulse-red 1.5s ease infinite;
}

@keyframes pulse-green {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.5);
    }
    50% {
        box-shadow: 0 0 0 4px rgba(34, 197, 94, 0);
    }
}

@keyframes pulse-red {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5);
    }
    50% {
        box-shadow: 0 0 0 4px rgba(239, 68, 68, 0);
    }
}

/* ── Response time ── */
.rt {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-variant-numeric: tabular-nums;
    font-size: 0.8125rem;
    font-weight: 500;
}

.rt-ok {
    color: var(--success);
}

.rt-warn {
    color: var(--warning);
}

.rt-error {
    color: var(--danger);
}

.rt-none {
    color: var(--text-muted);
    font-style: italic;
}

/* ── Fail badge ── */
.fail-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 26px;
    padding: 0 0.5rem;
    border-radius: 6px;
    font-size: 0.8125rem;
    font-weight: 600;
}

.fail-0 {
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.05);
}

.fail-low {
    color: var(--warning);
    background: var(--warning-dim);
}

.fail-high {
    color: var(--danger);
    background: var(--danger-dim);
}

/* ── Date ── */
.date-val {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.date-none {
    font-size: 0.8125rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ── Empty state ── */
.empty-state {
    text-align: center;
    padding: 5rem 2rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
    opacity: 0.4;
}

.empty-state p {
    font-size: 0.9375rem;
    margin: 0;
}

/* ── Responsive ── */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .app-header {
        padding: 0.75rem 1rem;
    }

    .monitor-table thead th,
    .monitor-table td {
        padding: 0.75rem 0.875rem;
    }

    .monitor-card-header {
        padding: 0.875rem 1rem;
    }
}