*{
    box-sizing: border-box;
    padding: 0;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin: 0;
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: aliceblue;
}

.container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 700px;
    margin: 2rem 0;
}

.container h1{
    color: #555;
}

.container .stack{
    background: white;
    padding: 0 20px 20px;
    border-radius: .3rem;
    box-shadow: 2px 2px 15px 0 rgba(0, 0, 0.307);
    position: relative;
}

.stack label{
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-top: 10px;
    cursor: pointer;
}

.stack label h2{
    width: 35px;
    height: 35px;
    background: black;
    color: white;
    border-radius: 0.3rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.stack label::after{
    content: "+";
    position: absolute;
    right: 20px;
    font-size: 2rem;
    color: rgb(118, 115, 115);
}

.stack:hover label::after{
    color: rgb(37, 36, 36);
    transition: .5s;
}

.stack input:checked ~ label::after{
    transform: rotate(135deg);
}

/* .stack input{
    appearance: none;
} */
.stack input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}
.content{
    max-height: 0;
    overflow: hidden;
    transition: .5s;
}

.stack input:checked ~ .content{
    max-height: 100vh;
}