:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --critical: #ef4444;
    --critical-bg: rgba(239, 68, 68, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);
    --radius: 16px;
    --radius-sm: 8px;
    --blur: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.app {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 16px 48px;
}

/* Error Banner */
.error-banner {
    background: var(--critical-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    animation: slideDown 0.3s ease;
}
.error-banner.hidden { display: none; }
.error-text { flex: 1; font-size: 14px; color: var(--critical); }
.btn-retry {
    background: var(--critical);
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: opacity var(--transition);
}
.btn-retry:hover { opacity: 0.85; }

/* Header */
.header {
    margin-bottom: 32px;
}
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}
.subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 2px;
}
.header-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-muted);
}
.meta-separator { opacity: 0.4; }

/* Overall Status */
.overall-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 14px;
    transition: all var(--transition);
}
.overall-status.status-healthy { background: var(--success-bg); color: var(--success); }
.overall-status.status-warning { background: var(--warning-bg); color: var(--warning); }
.overall-status.status-critical { background: var(--critical-bg); color: var(--critical); }
.overall-status.status-loading { background: var(--bg-card); color: var(--text-muted); }

.status-pulse {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

/* Buttons */
.btn-icon {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
}
.btn-icon:hover { background: var(--bg-card-hover); color: var(--text-primary); border-color: var(--border-hover); }

/* Toggle */
.toggle-label { display: flex; align-items: center; cursor: pointer; }
.toggle-label input { display: none; }
.toggle-slider {
    width: 36px;
    height: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    position: relative;
    transition: all var(--transition);
}
.toggle-slider::after {
    content: '';
    width: 14px;
    height: 14px;
    background: var(--text-muted);
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: all var(--transition);
}
.toggle-label input:checked + .toggle-slider { background: var(--success-bg); border-color: var(--success); }
.toggle-label input:checked + .toggle-slider::after { transform: translateX(16px); background: var(--success); }

/* Sections */
.section { margin-bottom: 32px; }
.section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* DB Grid */
.db-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
@media (max-width: 640px) {
    .db-grid { grid-template-columns: 1fr; }
}

/* Cards */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all var(--transition);
}
.card:hover { border-color: var(--border-hover); background: var(--bg-card-hover); }

/* DB Card */
.db-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.db-name { font-size: 16px; font-weight: 600; }
.db-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}
.db-status-dot.ok { background: var(--success); }
.db-status-dot.warning { background: var(--warning); }
.db-status-dot.critical { background: var(--critical); }

.db-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}
.db-stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}
.db-stat-value {
    font-size: 15px;
    font-weight: 600;
}
.db-stat-value.text-success { color: var(--success); }
.db-stat-value.text-warning { color: var(--warning); }
.db-stat-value.text-critical { color: var(--critical); }

/* History bar chart */
.history-chart {
    display: flex;
    gap: 1px;
    height: 24px;
    align-items: flex-end;
    margin-top: 8px;
}
.history-bar {
    flex: 1;
    min-width: 2px;
    border-radius: 1px;
    transition: height var(--transition), background var(--transition);
}
.history-bar.success { background: var(--success); height: 100%; }
.history-bar.failure { background: var(--critical); height: 100%; }
.history-bar.skipped { background: var(--bg-card); height: 40%; }
.history-bar:hover { opacity: 0.8; transform: scaleY(1.1); }
.history-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 6px;
}

.db-failure-row {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
@media (max-width: 640px) {
    .info-grid { grid-template-columns: 1fr; }
}
.info-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.info-icon { font-size: 20px; }
.info-title { font-size: 15px; font-weight: 600; }
.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
}
.info-row + .info-row { border-top: 1px solid var(--border); }
.info-label { font-size: 13px; color: var(--text-secondary); }
.info-value { font-size: 13px; font-weight: 500; }

/* Skeletons */
.card-skeleton { animation: shimmer 1.5s infinite; }
.skeleton-line {
    height: 14px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    margin-bottom: 12px;
}
.w-40 { width: 40%; }
.w-60 { width: 60%; }
.w-80 { width: 80%; }
@keyframes shimmer {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* Footer */
.footer {
    text-align: center;
    padding-top: 32px;
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}
.footer-sep { opacity: 0.4; }
.footer-link {
    color: var(--info);
    text-decoration: none;
    transition: opacity var(--transition);
}
.footer-link:hover { opacity: 0.8; }

/* Animations */
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.4s ease; }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}