:root {
    --bg-primary: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #253347;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-yellow: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --border: #334155;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.header {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-bottom: 1px solid var(--border);
    padding: 1.2rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

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

.header-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.header h1 {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 0.35rem 0.8rem;
    border-radius: 20px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

.uptime-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.dashboard {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    display: grid;
    gap: 1.2rem;
}

/* Top row: CPU, Memory, Swap/Load */
.row-top {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.2rem;
}

/* Middle row: Disks, Network */
.row-mid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
}

/* Bottom row: Containers, Processes */
.row-bottom {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 1.2rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.4rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    background: var(--bg-card-hover);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.card-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.card-icon.cpu { background: rgba(59, 130, 246, 0.15); }
.card-icon.mem { background: rgba(139, 92, 246, 0.15); }
.card-icon.load { background: rgba(245, 158, 11, 0.15); }
.card-icon.disk { background: rgba(6, 182, 212, 0.15); }
.card-icon.net { background: rgba(16, 185, 129, 0.15); }
.card-icon.docker { background: rgba(59, 130, 246, 0.15); }
.card-icon.proc { background: rgba(239, 68, 68, 0.15); }

.card-value {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border-radius: 8px;
}

.big-number {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.big-number span {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Gauge */
.gauge-container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.gauge-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
}

.gauge-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 1s ease;
}

.gauge-fill.blue { background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan)); }
.gauge-fill.purple { background: linear-gradient(90deg, var(--accent-purple), #c084fc); }
.gauge-fill.yellow { background: linear-gradient(90deg, var(--accent-yellow), #fbbf24); }
.gauge-fill.green { background: linear-gradient(90deg, var(--accent-green), #34d399); }
.gauge-fill.red { background: linear-gradient(90deg, var(--accent-red), #f87171); }

.mem-detail {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.8rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.mem-detail strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Load card */
.load-values {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.8rem;
    margin-top: 0.5rem;
}

.load-item {
    text-align: center;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.load-item .value {
    font-size: 1.5rem;
    font-weight: 700;
}

.load-item .label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 0.3rem;
    text-transform: uppercase;
}

/* Disk bars */
.disk-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.disk-item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.disk-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
}

.disk-mount {
    font-weight: 600;
}

.disk-size {
    color: var(--text-secondary);
}

/* Network */
.net-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.net-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.8rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.net-name {
    font-weight: 600;
    font-size: 0.85rem;
}

.net-stats {
    display: flex;
    gap: 1.2rem;
    font-size: 0.78rem;
}

.net-rx { color: var(--accent-green); }
.net-tx { color: var(--accent-blue); }

/* Containers table */
.container-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.container-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.8rem;
    align-items: center;
    padding: 0.6rem 0.8rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 0.8rem;
}

.container-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.container-status.running { background: var(--accent-green); }
.container-status.stopped { background: var(--accent-red); }

.container-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.container-image {
    color: var(--text-secondary);
    font-size: 0.72rem;
    text-align: right;
}

/* Processes */
.process-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.process-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 0.8rem;
    padding: 0.6rem 0.8rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    font-size: 0.8rem;
}

.process-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.process-cpu {
    color: var(--accent-yellow);
    font-weight: 600;
    white-space: nowrap;
}

.process-mem {
    color: var(--accent-purple);
    font-weight: 600;
    white-space: nowrap;
}

/* CPU cores mini chart */
.cpu-cores-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 4px;
    margin-top: 0.8rem;
}

.core-bar {
    height: 32px;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.04);
}

.core-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 4px;
    transition: height 1s ease;
    background: linear-gradient(0deg, var(--accent-blue), var(--accent-cyan));
}

.core-label {
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.55rem;
    color: rgba(255, 255, 255, 0.6);
    z-index: 1;
}

/* Temperature badges */
.temp-badges {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.6rem;
    flex-wrap: wrap;
}

.temp-badge {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-weight: 600;
}

/* Loading & Error */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 60vh;
    flex-direction: column;
    gap: 1rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.error-banner {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--accent-red);
    padding: 0.8rem 1.2rem;
    border-radius: 10px;
    font-size: 0.85rem;
    text-align: center;
    display: none;
}

/* Speed Test */
.row-speed {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.2rem;
}

.card-icon.speed { background: rgba(245, 158, 11, 0.15); }

.speed-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
}

.speed-gauges {
    display: flex;
    justify-content: center;
    gap: 3rem;
    width: 100%;
    flex-wrap: wrap;
}

.speed-gauge {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    min-width: 140px;
}

.speed-arc {
    width: 140px;
    height: 90px;
}

.speed-arc-fill {
    transition: stroke-dasharray 1s ease;
}

.speed-value {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
}

.speed-value.idle {
    font-size: 2rem;
    color: var(--text-secondary);
}

.speed-unit {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.1rem;
}

.speed-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.speed-gauge.ping {
    justify-content: center;
}

.ping-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 4px solid var(--accent-cyan);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.02);
    transition: border-color 0.5s ease;
}

.speed-btn {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border: none;
    color: white;
    padding: 0.7rem 2rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.02em;
}

.speed-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
}

.speed-btn:active {
    transform: translateY(0);
}

.speed-btn:disabled,
.speed-btn.running {
    background: linear-gradient(135deg, #475569, #64748b);
    cursor: not-allowed;
    animation: pulse-btn 1.5s infinite;
}

@keyframes pulse-btn {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.speed-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.speed-tab {
    flex: 1;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.speed-tab:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.speed-tab.active {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.4);
    color: var(--accent-blue);
}

.speed-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 0.5rem;
}

.speed-loading {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
}

.speed-btn.int {
    background: linear-gradient(135deg, var(--accent-purple), #c084fc);
}

.speed-btn.int:hover {
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
}

.speed-btn.int.running {
    background: linear-gradient(135deg, #475569, #64748b);
}

.speed-tag.isp {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-weight: 600;
}

.speed-info {
    display: flex;
    gap: 1.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

/* Responsive */
@media (max-width: 1024px) {
    .row-top { grid-template-columns: 1fr 1fr; }
    .row-mid { grid-template-columns: 1fr; }
    .row-bottom { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .row-top { grid-template-columns: 1fr; }
    .header { padding: 1rem; }
    .dashboard { padding: 1rem; }
}