:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #131833;
    --bg-card: #1a1f3a;
    --bg-card-hover: #222847;

    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;

    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;

    --border-color: rgba(255, 255, 255, 0.1);
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1038 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.header {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s ease-in-out infinite;
}

.logo-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.logout-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.logout-button:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--accent-red);
    transform: translateY(-2px);
}

.logout-button svg {
    width: 20px;
    height: 20px;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: blink 1.5s ease-in-out infinite;
}

.status-indicator.connected {
    background: var(--accent-green);
    box-shadow: 0 0 10px var(--accent-green);
}

.status-indicator.disconnected {
    background: var(--accent-red);
    animation: none;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

#statusText {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.3);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon.download {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(6, 182, 212, 0.2));
}

.stat-icon.upload {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(236, 72, 153, 0.2));
}

.stat-icon.connections {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(52, 211, 153, 0.2));
}

.stat-icon.uptime {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(251, 191, 36, 0.2));
}

.stat-icon svg {
    width: 28px;
    height: 28px;
}

.stat-icon.download svg {
    color: var(--accent-cyan);
}

.stat-icon.upload svg {
    color: var(--accent-purple);
}

.stat-icon.connections svg {
    color: var(--accent-green);
}

.stat-icon.uptime svg {
    color: var(--accent-orange);
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

/* Charts Section */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-container {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.chart-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.chart-legend {
    display: flex;
    gap: 1.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.legend-color.download {
    background: var(--accent-cyan);
}

.legend-color.upload {
    background: var(--accent-purple);
}

canvas {
    max-width: 100%;
    height: 250px !important;
}

/* Interfaces Section */
.interfaces-section,
.ports-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.interfaces-section h2,
.ports-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.interfaces-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1rem;
}

.interface-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.interface-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateX(4px);
}

.interface-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.interface-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

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

.interface-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.interface-stat-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Ports Section */
.ports-list {
    display: grid;
    gap: 0.75rem;
}

.port-item {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.port-item:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateX(4px);
}

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

.port-number {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--accent-blue);
    min-width: 80px;
}

.port-name {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.port-connections {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.port-bar {
    flex: 1;
    max-width: 400px;
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin: 0 1rem;
}

.port-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

    .interfaces-grid {
        grid-template-columns: 1fr;
    }

    .chart-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

.loading {
    background: linear-gradient(90deg,
            var(--bg-secondary) 0%,
            var(--bg-card-hover) 50%,
            var(--bg-secondary) 100%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}