style.css

:root{
    --color-header: #44475A;
    --color-background: #282A36;
    --color-text: #f8f8f2;
}

*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{
    background-color: var(--color-background);
    color: var(--color-text);

    font-family: 'Poppins', sans-serif;
}

header {
    background-color: var(--color-header);
    text-align: center;
    padding:  4rem 0;
}

/*====TITLES====*/

header h1{
    font-size: 28px;
}

main h2 {
    font-size: 22px;
    font-weight: 400;

    margin-bottom: .25rem;
}

/*====main====*/

#form{
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 5rem;
}


input {
    background-color: var(--color-header);
    color: var(--color-text);
    
    outline: none;

    height: 70px;

    border: 2px solid var(--color-text);
    border-radius: .5rem;
    
    padding-left: 1rem;
    margin-bottom: 5rem;
    
    font-family: 'Poppins';
    font-size: 20px;
    font-weight: 500;

}

button {
    background-color: var(--color-header);
    color: var(--color-text);
    
    height: 60px;
    width: 180px;
    
    border-radius: .5rem;
    border: 2px solid var(--color-text);
    
    font-size: 20px;
    font-family: 'Poppins';
    font-weight: 500;
    transition: background-color .3s ;

}

button:hover{
    cursor: pointer;
    background-color: var(--color-text);
    color: var(--color-header);
}

::-webkit-input-placeholder {
    color: rgba(255, 255, 255, .6);
    font: 22px 'Poppins', sans-serif;
 }


/*====footer====*/

footer {
    text-align: center;

    font-size: 20px;
    font-weight: 300 ;

    margin: 4rem 0;
}

@media (min-width: 800px){
    #form{
        display: grid;
        grid-template-columns: 2fr 2fr 1fr;
        gap: 10px;

        margin: 15% 30px 0 30px;
        
        align-items: end;
        align-self: center;
    }

    input{
        width: 100%;
        margin: 0;
        
    }

    button{
        margin: 0;
        height: 70px;
        width: 100%
    }

    footer{
        text-align: left;
        margin: 30px
    }
}