body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #ffffff;
}

header {
    background-color: #1e1e1e;
    color: white;
    padding: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 100%;
    box-sizing: border-box;
    height: 60px;
}

header .logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

header .logo img {
    max-width: 200px;
    height: auto;
    display: block;
    margin: 0;
}

main {
    padding: 20px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
    margin-top: 0px;
}