body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: #fff;
    background: url('background.jpg') no-repeat center top;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}


header {
    background: rgba(0, 0, 0, 0.7);
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .logo {
    font-size: 22px;
    font-weight: bold;
    color: #f00;
}


nav {
    position: relative;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #f00;
}


.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 25px;
    height: 18px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    background: #fff;
    border-radius: 2px;
}


main {
    flex: 1;
    padding: 20px;
    max-width: 1000px;
    margin: 0 auto;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 10px;
}

main h1, main h2, main h3 {
    color: #ffcc00;
    margin-top: 20px;
}

main p {
    margin: 15px 0;
    line-height: 1.6;
}

main ul, main ol {
    margin: 15px 0;
    padding-left: 20px;
}

main ul li, main ol li {
    margin: 5px 0;
}

main table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: #222;
    color: #fff;
}

main table th, main table td {
    border: 1px solid #555;
    padding: 10px;
    text-align: left;
}

main table th {
    background: #333;
    color: #ffcc00;
}


footer {
    background: rgba(0, 0, 0, 0.8);
    text-align: center;
    padding: 15px;
    font-size: 14px;
}


@media (max-width: 768px) {
    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 50px;
        right: 0;
        background: rgba(0, 0, 0, 0.9);
        width: 200px;
        padding: 20px;
        border-radius: 5px;
    }

    nav ul.active {
        display: flex;
    }

    .menu-toggle {
        display: flex;
    }
}