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

:root {
    --bg-primary: #0f0f1a;
    --bg-card: rgba(30, 30, 50, 0.8);
    --bg-card-hover: rgba(40, 40, 70, 0.9);
    --text-primary: #e0e0e0;
    --text-secondary: #888;
    --accent-cpu: #00d4ff;
    --accent-mem: #a855f7;
    --accent-swap: #f59e0b;
    --accent-disk: #22c55e;
    --accent-net: #ec4899;
    --border: rgba(255, 255, 255, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(ellipse at top left, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(168, 85, 247, 0.1) 0%, transparent 50%);
    min-height: 100vh;
    color: var(--text-primary);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #00d4ff, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.meta .separator {
    margin: 0 10px;
    opacity: 0.5;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.card.wide {
    grid-column: span 2;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.card-header .icon {
    font-size: 1.5rem;
}

.card-header .title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.metric-main {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.metric-main .unit {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.progress-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
    background: linear-gradient(90deg, var(--accent-cpu), #00a8cc);
}

.progress.swap {
    background: linear-gradient(90deg, var(--accent-swap), #d97706);
}

.progress.disk {
    background: linear-gradient(90deg, var(--accent-disk), #16a34a);
}

/* Memory specific */
.card:nth-child(2) .progress {
    background: linear-gradient(90deg, var(--accent-mem), #7c3aed);
}

.metric-sub {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.network-stats {
    display: flex;
    justify-content: space-around;
    padding: 20px 0;
}

.net-item {
    text-align: center;
}

.net-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.net-value {
    font-size: 2rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-net), #db2777);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

footer {
    margin-top: 30px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    display: flex;
    justify-content: center;
    gap: 20px;
}

#update-status {
    transition: opacity 0.3s;
}

#update-status.success {
    color: var(--accent-disk);
}

#update-status.error {
    color: #ef4444;
}

/* Responsive */
@media (max-width: 600px) {
    .grid {
        grid-template-columns: 1fr;
    }
    
    .card.wide {
        grid-column: span 1;
    }
    
    .metric-main {
        font-size: 2.5rem;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
}

/* Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 1s infinite;
}