body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #f0f0f0;
}
header {
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo-img {
    margin: 3%;
    width: 50px;
    height: 50px;
}
nav a {
    color: black;
    text-decoration: none;
    margin-left: 1rem;
    font-weight: bold;
}
#about {
    margin-right: 30px;
}
main {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}
#container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    padding: 40px;
    text-align: center;
}
h1 {
    color: black;
}
.presentation-button {
    background-color: #E7CE54;
    color: black;
    border: none;
    padding: 15px 30px;
    margin: 20px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 18px;
    transition: background-color 0.3s;
}
.presentation-button:hover {
    background-color: #c6a92b;
}
footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: black;
    text-align: right;
    padding: 1rem;
}
footer a {
    color: black;
    font-weight: bold;
    text-decoration: none;
    margin: 0 0.5rem;
}