* {
    font-family:Helvetica, sans-serif;
}

header {
    color: black;
    padding: 1rem;
    text-align: center;
    justify-content: center;
    border-radius: 5rem;
    margin: 0 auto;
}

.section-header {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

header img {
    width: 200px;
    height: auto;
    margin-top: 1rem;
}

body {
    font-family: Arial, sans-serif;
    text-align: center;
    font-size: 1rem;
}

button {
    font-size: 1rem;
    color: black;
    padding: 0.5rem 1rem;
    margin: 0.5rem;
    border: 2px solid rgb(68, 0, 0);
    border-style: solid;    
    border-radius: 25rem;
    cursor: pointer;
    transition: ease-in-out 0.3s;
}

button:hover {
    background: linear-gradient(to right, rgb(225, 0, 0), rgb(218, 162, 162));
    color: white;
    cursor: pointer;
}

table {
    margin: 20px auto;
    border-collapse: collapse;
}

td {
    border: 2px solid black;
    padding: 15px;
}

input {
    width: 50px;
    text-align: center;
    font-size: 1.5rem;
}

.matrix-section {
    border: 2px solid black;
    border-radius: 3rem;
    padding: 3rem;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

footer {
    margin-top: 10rem;
    padding: 1rem;
    text-align: center;
    margin-bottom: 1rem;
}