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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #94a3b8;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --body-bg: #f1f5f9;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--body-bg);
    color: var(--dark);
    line-height: 1.5;
}

/* App Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--card-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    padding: 24px;
    font-size: 1.5rem;
    font-weight: 700;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    color: var(--primary);
    font-size: 1.8rem;
}

.logo span {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-menu {
    flex: 1;
    padding: 20px 16px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--secondary);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 4px;
    transition: all 0.2s;
}

.nav-item:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-item.active {
    background: var(--primary);
    color: white;
}

.nav-item i {
    width: 20px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
}

.server-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 24px;
}

/* Top Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-title h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.page-title p {
    color: var(--gray);
    font-size: 0.875rem;
}

.header-actions {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--light);
    color: var(--dark);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

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

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.75rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid var(--border);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.stat-icon.red { background: #fee2e2; color: var(--danger); }
.stat-icon.green { background: #d1fae5; color: var(--success); }
.stat-icon.blue { background: #dbeafe; color: var(--info); }
.stat-icon.purple { background: #ede9fe; color: #8b5cf6; }

.stat-info {
    flex: 1;
}

.stat-info h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

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

.stat-trend {
    font-size: 0.75rem;
    color: var(--success);
}

.threat-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.threat-badge[data-level="safe"] { background: #d1fae5; color: #065f46; }
.threat-badge[data-level="medium"] { background: #fed7aa; color: #92400e; }
.threat-badge[data-level="high"] { background: #fee2e2; color: #991b1b; }
.threat-badge[data-level="critical"] { background: #fecaca; color: #7f1d1d; }

/* Charts Row */
.charts-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.chart-card, .data-card, .settings-card {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chart-card canvas {
    padding: 20px;
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

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

.data-table th {
    text-align: left;
    padding: 12px 16px;
    background: var(--light);
    font-weight: 600;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

.data-table tr:hover {
    background: var(--light);
}

.loading-cell {
    text-align: center;
    color: var(--gray);
    padding: 40px;
}

/* Filters */
.card-filters {
    display: flex;
    gap: 12px;
}

.filter-input, .filter-select {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
}

.filter-input:focus, .filter-select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Settings */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.settings-card {
    padding: 20px;
}

.settings-card h3 {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-item {
    margin-bottom: 16px;
}

.setting-item label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.875rem;
}

.setting-item input[type="number"] {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.setting-item input[type="checkbox"] {
    margin-right: 8px;
}

/* Pages */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 72px;
    }
    .sidebar span, .sidebar-footer {
        display: none;
    }
    .logo span {
        display: none;
    }
    .main-content {
        margin-left: 72px;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .charts-row {
        grid-template-columns: 1fr;
    }
}

/* Badges */
.country-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.block-btn {
    background: var(--danger);
    color: white;
    border: none;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
}

.block-btn:hover {
    background: #dc2626;
}