* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: #777;
    color: white;
}

header {
    text-align: center;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    width: 100%;
    position: relative;
    z-index: 1000;
}

#menu-icon {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 40px;
    width: 40px;
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
}

#menu-icon span {
    display: block;
    width: 28px;
    height: 4px;
    margin: 4px 0;
    background: white;
    border-radius: 2px;
    transition: 0.3s;
    list-style: none;

}

#main-nav {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background-color: rgba(0, 0, 0, 0.9);
    width: 200px;
    border-radius: 4px;
}

#main-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
}

#main-nav li {
    padding: 10px 20px;
    position: relative;
}

#main-nav li:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

#main-nav li a {
    color: white;
    text-decoration: none;
    position: relative;
}