body {
    background-image: url('../pictures/background.jpg');
    background-size: cover; 
    background-repeat: no-repeat; 
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.a {
    padding: 40px 40px 40px 40px;
    border-top: 0px solid rgb(187, 56, 56);
    opacity: 90%;
    background-color: whitesmoke;
    text-align: center;
    align-items: center;
}

.b {
    margin-bottom: 15px;
    padding: 20px 20px 20px 20px;
    border: none;
    outline: none;
    border-bottom: 1px solid black;
    text-align: center;
    align-items: center;
    font-size: xx-large;
    font-family: Perpetua, Baskerville, Big Caslon, Palatino Linotype, Palatino, serif;
}

.c {
    margin-bottom: 15px;
    border: none;
    border-bottom: 0px solid rgb(187, 56, 56);
    background-color: transparent; 
    text-align: center;
    font-family: Perpetua, Baskerville, Big Caslon, Palatino Linotype, Palatino, serif;
}

.c:hover {
    border-bottom: 2px solid rgb(105, 185, 105);
    opacity: 100%;
    font-weight: bold;
}

.c:active {
    outline: none;
    border: none;
    border-bottom: 2px solid rgb(105, 185, 105);
    opacity: 100%;
    font-weight: bold;
}

.c::after {
    outline: none;
    border: none;
    border-bottom: 2px solid rgb(105, 185, 105);
    opacity: 100%;
    font-weight: bold;
}