:root {
    /* Light mode colors */
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f7fafc;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --text-heading: #1a202c;
    --border-color: #e2e8f0;
    --border-light: #edf2f7;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.1);
    --status-online-bg: #c6f6d5;
    --status-online-text: #22543d;
    --status-offline-bg: #fed7d7;
    --status-offline-text: #742a2a;
    --log-info: #2c5282;
    --log-warning: #c05621;
    --log-error: #c53030;
    --scrollbar-track: #f7fafc;
    --scrollbar-thumb: #cbd5e0;
    --scrollbar-thumb-hover: #a0aec0;
}

[data-theme="dark"] {
    /* Dark mode colors */
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e0;
    --text-tertiary: #a0aec0;
    --text-heading: #f7fafc;
    --border-color: #4a5568;
    --border-light: #2d3748;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
    --status-online-bg: #22543d;
    --status-online-text: #c6f6d5;
    --status-offline-bg: #742a2a;
    --status-offline-text: #fed7d7;
    --log-info: #90cdf4;
    --log-warning: #f6ad55;
    --log-error: #fc8181;
    --scrollbar-track: #2d3748;
    --scrollbar-thumb: #4a5568;
    --scrollbar-thumb-hover: #718096;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 24px;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.header {
    border-bottom: 1px solid var(--border-color);
    padding: 24px 0;
    margin-bottom: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: border-color 0.3s ease;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-heading);
    letter-spacing: -0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header .timestamp {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 400;
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--text-tertiary);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px var(--shadow);
    transition: box-shadow 0.2s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.panel:hover {
    box-shadow: 0 4px 6px var(--shadow-hover);
}

.panel-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #48bb78;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { 
        opacity: 1;
    }
    50% { 
        opacity: 0.6;
    }
}

.panel-content {
    color: var(--text-primary);
}

.metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
    transition: border-color 0.3s ease;
}

.metric:last-child {
    border-bottom: none;
}

.metric-label {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 400;
}

.metric-value {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9375rem;
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
}

.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge.online {
    color: var(--status-online-text);
    background: var(--status-online-bg);
}

.status-badge.offline {
    color: var(--status-offline-text);
    background: var(--status-offline-bg);
}

.log-panel {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-size: 0.8125rem;
    max-height: 200px;
    overflow-y: auto;
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.log-entry {
    padding: 6px 0;
    color: var(--text-secondary);
    border-left: 3px solid transparent;
    padding-left: 12px;
    margin-bottom: 4px;
    font-size: 0.8125rem;
}

.log-entry.info {
    border-left-color: #4299e1;
    color: var(--log-info);
}

.log-entry.warning {
    border-left-color: #ed8936;
    color: var(--log-warning);
}

.log-entry.error {
    border-left-color: #f56565;
    color: var(--log-error);
}

.log-entry.success {
    border-left-color: #48bb78;
    color: #48bb78;
}

.log-entry.debug {
    border-left-color: #9f7aea;
    color: #9f7aea;
    opacity: 0.8;
}

.log-entry.warn {
    border-left-color: #ed8936;
    color: var(--log-warning);
}

.grid-full {
    grid-column: 1 / -1;
}

.command-line {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 24px;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.command-line::before {
    content: '> ';
    color: var(--text-tertiary);
    margin-right: 8px;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

@media (max-width: 768px) {
    body {
        padding: 16px;
    }
    
    .dashboard {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .panel {
        padding: 20px;
    }
}