Untitled

#form{
    display: flex;
    align-items: center;
    justify-content:center;
    height: 100vh;
    margin:0;
}

#form_box{
    width:400px;
    height:440px;
    background-color:none;
    justify-content: center;
    align-items: center;
}
#form_box h1{
    display:flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-bottom: 30px;
}

#form_box .input-box{
    display: flex;
    align-items: center;
    justify-content: center;
    max-height : 65px;
    transition: max-height 0.5s;
    overflow:hidden;

}
#form_box .input-box input{
width: 90%;
height: 100%;
margin:10px 10px;
justify-content: center;
background-color: #CABAAA;
border-color:none;
border-radius: 20px;
}

#form_box .input-box ::placeholder{
    fontsize:2rem;
    border-radius:20px ;
    display: flex;
    align-items: center;
}

#form_box a{
    margin-left: 14px;
    margin-top: 10x;
    font-size: 1rem;
    color: black;
}

#form_box #signinButton{
    display: flex;
    align-items: center;
    justify-content:space-evenly;
    padding: 5px 5px;
    margin-top: 20px;
    margin-right: 20px;
}

#form_box button{
    height:30px;
    width:60px;
    background-color: #CABAAA;
    font-size:1rem;
}