style.css

@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@200..800&display=swap");

:root {
    --transition_1: all 0.3s;
    --description-color: #10182899;
    --point-blue: #1570ef;
    --nearly-grey: #eeeeee;
}

body {
    margin: 0;
    display: flex;
}

#app-preview {
    display: flex;
    flex-direction: column;
}

#app-preview-container {
    display: flex;
    align-items: center;
    flex-direction: column;
    margin: 50px;
}

.preview-content {
    display: flex;
}

.app-item {
    display: flex;
    flex-direction: column;
    padding: 24px;
    cursor: pointer;
    webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
}

.app-item span {
    color: #0c231f99;
}

.selected-app-item {
    transition: var(--transition_1);
    border-left: 4px solid #0c231f;
    background-color: #e1ffa07a;
}

.unselected-app-item {
    transition: var(--transition_1);
    border-left: 4px solid var(--nearly-grey);
}

.app-item-preview {
    background-color: var(--nearly-grey);
    margin: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 20px;
    padding: 40px;
    width: 400px;
    height: 200px;
}

@keyframes apear {
    from {
        transform: translateX(-5px);
    }
    to {
        transform: translateX(0);
    }
}

.app-item-preview img {
    width: 80%;
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
    border-radius: 10px;
    animation: apear 0.3s ease;
}

.unselected-app-item-preview {
    transition: var(--transition_1);
    display: none;
}

.selected-app-item-preview {
    transition: var(--transition_1);
    display: inline-block;
}

.description {
    color: var(--description-color);
    font-family: "Manrope", sans-serif;
}

h1 {
    font-size: 60px;
    font-family: "Manrope", sans-serif;
}