/* 💀 Loading Skeletons - Animaciones de carga modernas */
/* Optimizado para todas las resoluciones */

/* === ANIMACIÓN BASE === */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

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

/* === SKELETON BASE === */
.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 0%,
        #e0e0e0 20%,
        #f0f0f0 40%,
        #f0f0f0 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite linear;
    border-radius: 8px;
    display: inline-block;
}

[data-theme="dark"] .skeleton {
    background: linear-gradient(
        90deg,
        #1c2128 0%,
        #2d333b 20%,
        #1c2128 40%,
        #1c2128 100%
    );
    background-size: 1000px 100%;
}

/* === SKELETON VARIANTS === */
.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
    width: 100%;
}

.skeleton-text-short {
    width: 60%;
}

.skeleton-title {
    height: 24px;
    margin-bottom: 12px;
    width: 40%;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-avatar-lg {
    width: 60px;
    height: 60px;
    border-radius: 50%;
}

.skeleton-button {
    height: 38px;
    width: 100px;
    border-radius: 6px;
}

.skeleton-card {
    height: 200px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.skeleton-table-row {
    height: 50px;
    margin-bottom: 8px;
    border-radius: 6px;
}

/* === SKELETON PARA TABLAS === */
.skeleton-table {
    width: 100%;
}

.skeleton-table-header {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.skeleton-table-header > div {
    flex: 1;
    height: 40px;
    border-radius: 6px;
}

.skeleton-table-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* === SKELETON PARA CARDS === */
.skeleton-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
}

@media (max-width: 768px) {
    .skeleton-card-grid {
        grid-template-columns: 1fr;
    }
}

.skeleton-card-item {
    background: var(--dark-surface);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .skeleton-card-item {
    background: var(--dark-surface);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* === SKELETON PARA DASHBOARD === */
.skeleton-stat-card {
    height: 120px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.skeleton-chart {
    height: 300px;
    border-radius: 12px;
    margin-bottom: 20px;
}

/* === LOADING SPINNER MODERNO === */
.modern-spinner {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 4px solid rgba(88, 166, 255, 0.2);
    border-top-color: #58a6ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.modern-spinner-sm {
    width: 24px;
    height: 24px;
    border-width: 3px;
}

.modern-spinner-lg {
    width: 80px;
    height: 80px;
    border-width: 6px;
}

/* === LOADING OVERLAY === */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    backdrop-filter: blur(4px);
}

[data-theme="dark"] .loading-overlay {
    background: rgba(0, 0, 0, 0.7);
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-content h3 {
    margin-top: 20px;
    font-weight: 600;
}

.loading-content p {
    margin-top: 8px;
    opacity: 0.8;
}

/* === SKELETON PARA VIAJES === */
.skeleton-viaje-card {
    background: var(--dark-surface);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .skeleton-viaje-card {
    background: var(--dark-surface);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.skeleton-viaje-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px;
}

.skeleton-viaje-badge {
    width: 100px;
    height: 28px;
    border-radius: 14px;
}

.skeleton-viaje-id {
    width: 80px;
    height: 28px;
    border-radius: 14px;
}

.skeleton-viaje-route {
    height: 120px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.skeleton-viaje-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}

.skeleton-viaje-info-item {
    height: 60px;
    border-radius: 8px;
}

.skeleton-viaje-actions {
    display: flex;
    gap: 8px;
}

.skeleton-viaje-actions > div {
    flex: 1;
    height: 40px;
    border-radius: 8px;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .skeleton-viaje-info {
        grid-template-columns: 1fr;
    }
    
    .skeleton-card-grid {
        padding: 10px;
        gap: 12px;
    }
}

/* === SKELETON PARA TRANSPORTISTAS === */
.skeleton-transportista-row {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.skeleton-transportista-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
}

.skeleton-transportista-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skeleton-transportista-name {
    width: 150px;
    height: 16px;
    border-radius: 4px;
}

.skeleton-transportista-email {
    width: 200px;
    height: 14px;
    border-radius: 4px;
}

.skeleton-transportista-actions {
    display: flex;
    gap: 8px;
}

.skeleton-transportista-actions > div {
    width: 36px;
    height: 36px;
    border-radius: 6px;
}

/* === FADE IN ANIMATION === */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* === PERFORMANCE OPTIMIZATIONS === */
.skeleton,
.modern-spinner {
    will-change: transform;
    transform: translateZ(0);
}

/* Reducir animaciones en dispositivos de bajo rendimiento */
@media (prefers-reduced-motion: reduce) {
    .skeleton,
    .modern-spinner {
        animation: none;
    }
    
    .skeleton {
        background: #e0e0e0;
    }
    
    [data-theme="dark"] .skeleton {
        background: #2d333b;
    }
}