Basic Media Queries

Mobile - Smartphone

Targets screens 767px or less

/** Smatphone**/
@media screen and (max-width: 767px) {
}

Targets screens 767px or larger

*Excluding mobile or 766 pixels

/** Smatphone**/
@media screen and (min-width: 767px) {
}

Tablets

Targets screens1024px or less

/** Tablet **/
@media screen and (max-width: 1024px) {
}

Targets screens 1024px or larger

*Excluding mobile or 1023 pixels

/** Tablet **/
@media screen and (min-width: 1024px) {
}

Laptops & Desktops

Pretty much targets any device with 1024 pixels or more

/** Desktop + **/
@media screen and (min-width:1024 px) {
}

https://www.w3schools.com/css/css3_mediaqueries.asp