/* ========================================
   PANTALLA DE CARGA CON LOGO
   ======================================== */
.certificados-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.98);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

.certificados-loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.certificados-loader-spinner {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.certificados-loader-img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    animation: pulse-loader 1.5s ease-in-out infinite;
}

.certificados-loader-spinner::before {
    content: '';
    position: absolute;
    width: 160px;
    height: 160px;
    border: 3px solid transparent;
    border-top-color: #3498db;
    border-right-color: #3498db;
    border-radius: 50%;
    animation: spin-loader 3s linear infinite;
}

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

@keyframes pulse-loader {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}