/******* Summer *******/


.summer-highlight {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 60%, #ace0c6 40%);
    z-index: 100;
    position: relative;
    display: inline-block;
}

.summer-highlight::before {
    background: linear-gradient(180deg, #ace0c6 60%, #ace0c6 40%);
    opacity: 0;
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    z-index: -100;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}

.summer-highlight:hover::before {
    opacity: 1;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}


/******* Autumn *******/


.autumn-highlight {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 60%, #deb887 40%);
    z-index: 100;
    position: relative;
    display: inline-block;
}

.autumn-highlight::before {
    background: linear-gradient(180deg, #deb887 60%, #deb887 40%);
    opacity: 0;
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    z-index: -100;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}

.autumn-highlight:hover::before {
    opacity: 1;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}


/******* Winter *******/


.winter-highlight {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 60%, #99cfe0 40%);
    z-index: 100;
    position: relative;
    display: inline-block;
}

.winter-highlight::before {
    background: linear-gradient(180deg, #99cfe0 60%, #99cfe0 40%);
    opacity: 0;
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    z-index: -100;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}

.winter-highlight:hover::before {
    opacity: 1;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}


/******* Spring *******/


.spring-highlight {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 60%, #ff9994 40%);
    z-index: 100;
    position: relative;
    display: inline-block;
}

.spring-highlight::before {
    background: linear-gradient(180deg, #ff9994 60%, #ff9994 40%);
    opacity: 0;
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    z-index: -100;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}

.spring-highlight:hover::before {
    opacity: 1;
    transition: opacity 150ms cubic-bezier(0.3, 0.5, 0.9, 0.9);
}