:root{
    --color-primary: #FFF;
    --color-secondary: #00447c;
    --color-tertialy: #333333;

    --font-color: #000000;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    background-color: var(--color-primary);

    color: var(--font-color);
    font-family: Arial , sans-serif;
}
input:focus{
    outline: none;
}
button:hover{
    border: 2px solid rebeccapurple;
}

#error{
    color: #fb0112;
}
#valid{
    color: limegreen;
}

footer{
    display: flex;
    margin-top: 40px;
    flex-direction: column;
    justify-content:center;
    align-items: center;
}

header{
    display: flex;
    justify-content: center;
}
@media (max-width: 768px){
    form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background-color: var(--color-secondary);
        padding: 15px;
        width: 350px;
        max-width: 400px;
        height: 250px;
        max-height: 300px;

        border-radius: 30px;
        box-shadow: 20px 20px 15px var(--color-tertialy);
    }
    input{
        margin: 10px;
        font-size: 1.5em;
        height: 40px;
        width: 300px;
        border: 1px solid black;
        padding:5px;
        border-radius: 10px;
    }
    input::placeholder{
        font-size: 1.5em;
    }
    button {
        display:inline-block;
        cursor:pointer;
        padding:10px 30px;
        font-size: 1.5em;
        text-decoration:none;

        border-radius: 10px;
        background-color: var(--color-primary);
        border: 2px solid var(--color-secondary);
    }
    header img {
        width: 80%;
        filter: drop-shadow(5px 5px 5px #555);
    }

    footer p {
        filter: drop-shadow(5px 5px 5px #555);
    }
    footer img {
        width: 25%;
        filter: drop-shadow(5px 5px 5px #555);
    }
}
@media (min-width: 769px){
    html, body {
        margin: 0;
        height: 100vh;
    }
    form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background-color: var(--color-secondary);
        padding: 15px;
        width: 25%;
        max-width: 25%;

        border-radius: 30px;
        box-shadow: 10px 10px 15px var(--color-tertialy);
    }

    input{
        margin: 10px;
        font-size: 1.1em;

        border: 1px solid black;
        padding:10px;
        border-radius: 10px;
    }
    input::placeholder{
        font-size: 1.1em;
    }
    button {
        display:inline-block;
        cursor:pointer;
        padding:10px 30px;
        font-size: 1em;
        text-decoration:none;

        border-radius: 10px;
        background-color: var(--color-primary);
        border: 2px solid var(--color-secondary);
    }

    header img {
        width: 25%;
        filter: drop-shadow(5px 5px 5px #555);
    }

    footer p {
        filter: drop-shadow(5px 5px 5px #555);
    }
    footer img {
        width: 10%;
        filter: drop-shadow(5px 5px 5px #555);
    }
}