/* Global App Loader Styles */
#app-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #f8fafc; /* slate-50 */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 999999;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.dark #app-loader {
    background-color: #0f172a; /* slate-900 */
}

#app-loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #e2e8f0;
    border-top: 3px solid var(--primary-color, #3498db);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

.loader-text {
    font-family: 'Segoe UI', system-ui, sans-serif;
    font-size: 11px;
    font-weight: 800;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Evitar scroll mientras carga */
body.loading {
    overflow: hidden !important;
}

/* Ocultar el contenido principal inicialmente para evitar FOUC */
#main-wrapper {
    opacity: 0;
    transition: opacity 0.3s ease;
}

#main-wrapper.visible {
    opacity: 1;
}