:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #475569;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.card {
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.controls label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

select {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 0.25rem;
    padding: 0.5rem;
    cursor: pointer;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
}

.uptime-excellent {
    color: var(--success);
}

.uptime-good {
    color: var(--warning);
}

.uptime-poor {
    color: var(--danger);
}

.chart-container {
    position: relative;
    height: 300px;
}

.timeline {
    max-height: 500px;
    overflow-y: auto;
}

.timeline.expanded {
    max-height: none;
}

.timeline-entry {
    padding: 1rem;
    border-left: 3px solid var(--success);
    margin-bottom: 1rem;
    background-color: var(--bg-tertiary);
    border-radius: 0.25rem;
}

.timeline-entry.with-gap {
    border-left-color: var(--warning);
}

.timeline-timestamp {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.timeline-message {
    color: var(--text-primary);
}

.gap-warning {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background-color: var(--bg-primary);
    border-left: 3px solid var(--danger);
    border-radius: 0.25rem;
}

.gap-warning-header {
    color: var(--danger);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.gap-warning-details {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.error {
    color: var(--danger);
    padding: 1rem;
    background-color: rgba(239, 68, 68, 0.1);
    border-radius: 0.25rem;
    border: 1px solid var(--danger);
}

.btn {
    background-color: var(--accent);
    color: var(--text-primary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: var(--accent-hover);
}

.btn-small {
    padding: 0.25rem 0.75rem;
    font-size: 0.85rem;
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}