:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --bg-color: #ecf0f1;
    --card-bg: #ffffff;
    --text-color: #2c3e50;
    --border-color: #bdc3c7;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 30px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: relative;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1em;
    opacity: 0.9;
}

.user-info {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255,255,255,0.1);
    padding: 10px 20px;
    border-radius: 5px;
    backdrop-filter: blur(10px);
}

.user-info a {
    color: white;
    text-decoration: none;
    font-size: 14px;
}

.user-info a:hover {
    text-decoration: underline;
}

nav {
    background-color: var(--card-bg);
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

nav a {
    color: var(--primary-color);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.3s;
    font-weight: 500;
}

nav a:hover {
    background-color: var(--secondary-color);
    color: white;
}

.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 25px;
    margin: 20px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.card h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--secondary-color);
}

.card h3 {
    color: var(--secondary-color);
    margin: 20px 0 10px 0;
}

.status-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: bold;
    margin: 0 5px;
}

.status-active { background-color: var(--success-color); color: white; }
.status-inactive { background-color: var(--danger-color); color: white; }
.status-backup { background-color: var(--warning-color); color: white; }

table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

table th {
    background-color: var(--primary-color);
    color: white;
    padding: 12px;
    text-align: left;
}

table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
}

table tr:hover {
    background-color: #f8f9fa;
}

code {
    background-color: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

pre {
    background-color: #282c34;
    color: #abb2bf;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin: 15px 0;
}

pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.alert {
    padding: 15px 20px;
    border-radius: 5px;
    margin: 15px 0;
    border-left: 4px solid;
}

.alert-success { background-color: #d4edda; border-color: var(--success-color); }
.alert-warning { background-color: #fff3cd; border-color: var(--warning-color); }
.alert-danger { background-color: #f8d7da; border-color: var(--danger-color); }
.alert-info { background-color: #d1ecf1; border-color: var(--secondary-color); }

footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

.command-box {
    background-color: #1e1e1e;
    color: #d4d4d4;
    padding: 15px;
    border-radius: 5px;
    margin: 10px 0;
    font-family: 'Courier New', monospace;
}

.network-diagram {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 5px;
    margin: 15px 0;
    font-family: monospace;
    overflow-x: auto;
}

@media (max-width: 768px) {
    header h1 { font-size: 1.8em; }
    nav ul { flex-direction: column; }
    .grid { grid-template-columns: 1fr; }
}