:root {
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f2e;
    --bg-tertiary: #252b3b;
    --text-primary: #e4e6eb;
    --text-secondary: #8b92a7;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --border: #2d3548;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.login-overlay.hidden {
    display: none;
}

.login-box {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    color: var(--accent);
    margin-bottom: 2rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

button {
    width: 100%;
    padding: 0.875rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: var(--accent-hover);
}

.sidebar {
    width: 250px;
    background: var(--bg-secondary);
    padding: 2rem 0;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.logo {
    padding: 0 2rem;
    margin-bottom: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--accent);
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-menu li a {
    display: block;
    padding: 1rem 2rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-left: 3px solid var(--accent);
}

.sidebar-footer {
    padding: 1rem 2rem;
}

.sidebar-footer button {
    background: var(--danger);
}

.sidebar-footer button:hover {
    background: #dc2626;
}

.content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--success);
}

.status-indicator.disconnected {
    background: var(--danger);
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.stat-card h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent);
}

.recent-activity {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.recent-activity h3 {
    margin-bottom: 1rem;
}

#activity-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.activity-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border-left: 3px solid var(--accent);
}

.activity-item.critical {
    border-left-color: var(--danger);
}

.activity-item.high {
    border-left-color: var(--warning);
}

.activity-item.medium {
    border-left-color: #f59e0b;
}

.activity-item.low {
    border-left-color: var(--success);
}

.table-container {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    text-align: left;
    padding: 1rem;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    font-weight: 600;
}

tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

tbody tr:hover {
    background: var(--bg-tertiary);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge.critical {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.badge.high {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.badge.medium {
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent);
}

.badge.low {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.action-btn {
    padding: 0.5rem 1rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    width: auto;
}

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

.action-btn.danger {
    background: var(--danger);
}

.action-btn.danger:hover {
    background: #dc2626;
}

.whitelist-controls {
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
}

.whitelist-controls button {
    width: auto;
    padding: 0.75rem 1.5rem;
}

.logs-container {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    max-height: 600px;
    overflow-y: auto;
}

.log-entry {
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    border-left: 3px solid var(--border);
}

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

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

.log-entry.info {
    border-left-color: var(--accent);
}

.settings-container {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    max-width: 600px;
}

.settings-container h3 {
    margin-bottom: 1.5rem;
}

#change-credentials-btn {
    width: auto;
    margin-top: 1rem;
}