*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html{
    font-size: 62.5%;
}
body{
    font-family: 'Poppins', sans-serif;
    background-color: #edf2f7;
    color:#2d3748
}
header{
    background-color: #2c7a7b;
    color: white;
    text-align: center;
    padding: 1rem 0;
    box-shadow: 0px 0px 15px rgba(0, 0, 0, 0.2);
}
.add-contact, .search, .contact-list{
    max-width: 450px;
    padding: 2rem;
    background-color: white;
    margin: 2rem auto;
    border-radius: 8px;
    box-shadow: 0px 10px 25px rgba(0, 0, 0, 0.05);
}
h2{
    margin-bottom: 10px;
}
input, button{
    padding: 0.7rem 1rem;
    margin: 0.7rem 0;
    width: 100%;
    border: none;
    border-radius: 8px;
    transition:transform 0.1s, box-shadow 0.1s
}
input{
    background-color: #f7fafc;
    color: #2d3748;
    outline: none;
    border: 1px solid #ede8f0;   
}
input:focus{
    border-color: #a0aec0;
    box-shadow: 0 0 0 3px rgba(63, 153, 225, 0.5);
}
button{
    background-color: #2c7a7b;
    color: white;
    font-weight: 600;
    cursor: pointer;
    outline: none;
}
button:hover{
    background-color: #285e5a;
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(50, 50, 93, .1)
}
button:active{
    transform: translateY(0);
    box-shadow: 0 4px 8px rgba(50, 50, 93, .1)
}
li{
    font-size: 1.8rem;
    font-family: sans-serif;
}