/* ═══════════════════════════════════════════════════════════
   NETSENSE IOT - KPI CARDS v2.1
   Cards modernas para el dashboard con iconos SVG
   ════════════════════════════════════════════════════════════ */

/* ==================== GRID LAYOUT ==================== */

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

/* ==================== KPI CARD CONTAINER ==================== */

.kpi-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    gap: var(--space-5);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-height: 130px;
}

/* Barra de color izquierda (aparece on hover) */
.kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--kpi-accent, var(--primary));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--kpi-accent, var(--primary));
}

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

/* ==================== ICON CONTAINER ==================== */

.kpi-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--kpi-bg, rgba(79, 70, 229, 0.1));
    position: relative;
    overflow: hidden;
}

/* Gradiente sutil en el fondo del icono */
.kpi-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.1) 100%
    );
    pointer-events: none;
}

.kpi-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--kpi-accent, var(--primary));
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* ==================== CONTENT CONTAINER ==================== */

.kpi-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.kpi-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    line-height: 1.2;
}

.kpi-value {
    font-size: 42px;
    font-weight: var(--font-weight-bold);
    line-height: 1;
    font-family: var(--font-mono);
    color: var(--kpi-accent, var(--primary));
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
}

.kpi-unit {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    font-family: var(--font-primary);
}

.kpi-trend {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-muted);
    margin-top: var(--space-1);
}

/* ==================== COLOR VARIANTS ==================== */

/* Primary - Total Assets */
.kpi-card.kpi-primary {
    --kpi-accent: var(--brand-primary);
    --kpi-bg: rgba(79, 70, 229, 0.08);
}

/* Success - Con Analytics */
.kpi-card.kpi-success {
    --kpi-accent: var(--success);
    --kpi-bg: rgba(34, 197, 94, 0.08);
}

/* Warning - En Alerta */
.kpi-card.kpi-warning {
    --kpi-accent: var(--warning);
    --kpi-bg: rgba(251, 191, 36, 0.08);
}

/* Info - Health Promedio */
.kpi-card.kpi-info {
    --kpi-accent: var(--info);
    --kpi-bg: rgba(59, 130, 246, 0.08);
}

/* Danger - Críticos */
.kpi-card.kpi-danger {
    --kpi-accent: var(--danger);
    --kpi-bg: rgba(239, 68, 68, 0.08);
}

/* Neutral */
.kpi-card.kpi-neutral {
    --kpi-accent: var(--text-secondary);
    --kpi-bg: rgba(156, 163, 175, 0.08);
}

/* ==================== LOADING STATE ==================== */

.kpi-card.loading .kpi-value {
    color: var(--text-muted);
    font-size: var(--font-size-xl);
}

.kpi-card.loading .kpi-icon {
    opacity: 0.5;
}

/* Animación de entrada suave */
@keyframes kpiSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.kpi-card {
    animation: kpiSlideIn 0.4s ease-out backwards;
}

.kpi-card:nth-child(1) { animation-delay: 0s; }
.kpi-card:nth-child(2) { animation-delay: 0.1s; }
.kpi-card:nth-child(3) { animation-delay: 0.2s; }
.kpi-card:nth-child(4) { animation-delay: 0.3s; }

/* ==================== RESPONSIVE ==================== */

@media (max-width: 1024px) {
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .kpi-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .kpi-card {
        padding: var(--space-5);
        min-height: 110px;
    }
    
    .kpi-icon {
        width: 56px;
        height: 56px;
    }
    
    .kpi-icon svg {
        width: 28px;
        height: 28px;
    }
    
    .kpi-value {
        font-size: 36px;
    }
    
    .kpi-label {
        font-size: var(--font-size-xs);
    }
}

/* ==================== DARK MODE ADJUSTMENTS ==================== */

[data-theme="dark"] .kpi-card {
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
}

[data-theme="dark"] .kpi-card:hover {
    background: color-mix(in srgb, var(--bg-tertiary) 95%, white);
}

[data-theme="dark"] .kpi-icon::after {
    background: linear-gradient(135deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.05) 100%
    );
}