:root {
    /* Professional Dark Theme Palette */
    --bg-body: #0a0a0a;
    --bg-card: #141414;
    --bg-card-hover: #1a1a1a;

    --border-color: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;

    /* Status Colors */
    --accent-primary: #3b82f6;
    /* Professional Blue */
    --status-online: #10b981;
    /* Emerald */
    --status-offline: #ef4444;
    /* Red */
    --status-checking: #f59e0b;
    /* Amber */

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --radius-md: 8px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 600;
    letter-spacing: -0.025em;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.header {
    height: 70px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-body);
    /* Stays on top */
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.logout-btn {
    margin-left: 15px;
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    padding: 40px 0;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: #444;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.card-icon {
    font-size: 2rem;
    background: #1f1f1f;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    /* Default dim */
}

/* Status Dot */
.status-indicator {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
}

.status-indicator.online {
    color: var(--status-online);
    background: rgba(16, 185, 129, 0.1);
}

.status-indicator.online .status-dot {
    background: var(--status-online);
    box-shadow: 0 0 8px var(--status-online);
}

.status-indicator.offline {
    color: var(--status-offline);
    background: rgba(239, 68, 68, 0.1);
}

.status-indicator.offline .status-dot {
    background: var(--status-offline);
}

.status-indicator.checking {
    color: var(--status-checking);
}

.status-indicator.checking .status-dot {
    background: var(--status-checking);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.5;
    }

    50% {
        opacity: 1;
    }

    100% {
        opacity: 0.5;
    }
}

.card-title {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    flex: 1;
    /* Pushes button down */
    margin-bottom: 24px;
}

.card-action {
    display: block;
    width: 100%;
    padding: 12px;
    text-align: center;
    background: #1f1f1f;
    color: var(--text-primary);
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.2s;
    border: 1px solid transparent;
}

.card-action:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* System Stats Bar */
.stats-bar {
    display: flex;
    gap: 30px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

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

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    font-family: monospace;
}