/* ========================================
   VM Monitor Dashboard - Styles
   ======================================== */

:root {
    /* Colors */
    --bg-primary: #0f0f14;
    --bg-secondary: #16161d;
    --bg-card: rgba(30, 30, 40, 0.8);
    --bg-card-hover: rgba(40, 40, 55, 0.9);
    
    --text-primary: #f0f0f5;
    --text-secondary: #9090a0;
    --text-muted: #606070;
    
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-critical: #ef4444;
    --color-info: #3b82f6;
    
    --color-cpu: #8b5cf6;
    --color-ram: #06b6d4;
    --color-disk: #f59e0b;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --glow: 0 0 20px rgba(139, 92, 246, 0.15);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* ========================================
   Container & Header
   ======================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo svg {
    color: var(--color-cpu);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-cpu), var(--color-ram));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.separator {
    color: var(--text-muted);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-icon:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.btn-icon.spinning svg {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ========================================
   Loading & Empty State
   ======================================== */

.loading,
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) * 2;
    color: var(--text-secondary);
}

.hidden {
    display: none !important;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-cpu);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.empty-state svg {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.empty-state h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    margin-bottom: var(--spacing-lg);
}

.empty-state code {
    background: var(--bg-card);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-cpu);
}

/* ========================================
   VM Grid
   ======================================== */

.vm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.vm-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
    transition: var(--transition-normal);
    cursor: default;
}

.vm-card:hover {
    background: var(--bg-card-hover);
    box-shadow: var(--glow);
    transform: translateY(-2px);
}

.vm-card.offline {
    opacity: 0.6;
}

.vm-card.offline:hover {
    opacity: 0.8;
}

/* VM Header */
.vm-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.vm-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.vm-status.online {
    background: var(--color-success);
    box-shadow: 0 0 8px var(--color-success);
}

.vm-status.offline {
    background: var(--text-muted);
}

.vm-hostname {
    font-size: 1rem;
    font-weight: 600;
    flex-grow: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vm-cloud {
    font-size: 1.25rem;
}

/* Metrics */
.vm-metrics {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.metric {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

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

.metric-label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.metric-value {
    font-size: 0.875rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.metric-detail {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Progress Bar */
.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width var(--transition-normal);
}

.progress-fill.normal {
    background: linear-gradient(90deg, var(--color-success), #4ade80);
}

.progress-fill.warning {
    background: linear-gradient(90deg, var(--color-warning), #fbbf24);
}

.progress-fill.critical {
    background: linear-gradient(90deg, var(--color-critical), #f87171);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* VM Footer */
.vm-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.vm-lastseen {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.btn-details {
    padding: var(--spacing-xs) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-details:hover {
    background: var(--color-cpu);
    border-color: var(--color-cpu);
    color: white;
}

/* ========================================
   Modal
   ======================================== */

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
    position: relative;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

#modal-body h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

#modal-body h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    color: var(--text-secondary);
}

.modal-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.modal-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.modal-metric {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
}

.modal-metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--color-cpu);
}

.modal-metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Disk Table */
.disk-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.disk-table th,
.disk-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.disk-table th {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.disk-table .progress-bar {
    width: 100px;
}

/* History Chart */
.history-chart {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    min-height: 150px;
    position: relative;
}

.chart-legend {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
}

.legend-cpu {
    color: var(--color-cpu);
}

.legend-ram {
    color: var(--color-ram);
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    header {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .vm-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        padding: var(--spacing-lg);
    }
    
    .modal-metrics {
        grid-template-columns: 1fr;
    }
}