CSS Grid Expanding Box animation | HTML, CSS & JavaScript

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #000;
}

.cube-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    width: 300px;
    height: 300px;
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    border-radius: 30px;
}

.box {
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    cursor: pointer;
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

/* --- ICON SIZE INCREASE --- */
.box i {
    width: 64px;
    height: 64px;
    stroke-width: 2.5px;
    transition: transform 0.7s ease, filter 0.3s ease;
}

/* Grid Expansion Logic */
.cube-container:has(.box-1:hover) {
    grid-template-columns: 1fr 0fr;
    grid-template-rows: 1fr 0fr;
}

.cube-container:has(.box-2:hover) {
    grid-template-columns: 0fr 1fr;
    grid-template-rows: 1fr 0fr;
}

.cube-container:has(.box-3:hover) {
    grid-template-columns: 1fr 0fr;
    grid-template-rows: 0fr 1fr;
}

.cube-container:has(.box-4:hover) {
    grid-template-columns: 0fr 1fr;
    grid-template-rows: 0fr 1fr;
}

/* --- HOVER SCALE INCREASE --- */
.box:hover i {
    transform: scale(5);
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
}

.box-1 {
    background-color: #8b5cf6;
}

.box-2 {
    background-color: #3b82f6;
}

.box-3 {
    background-color: #f43f5e;
}

.box-4 {
    background-color: #10b981;
}

- CSS Grid Expanding Box animation

Live Preview