body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #0a192f;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow: hidden;
}

header {
    background-color: #112240;
    padding: 10px 20px;
    z-index: 1;
}

.nav-container {
    display: flex;
    align-items: center;
}

.home-icon {
    color: #ffffff;
    font-family: "Times New Roman", sans-serif;
    text-decoration: none;
    font-size: 20px;
    font-weight: bold;
    margin-right: 20px;
    padding: 5px 10px;
    transition: background-color 0.3s ease;
}

.home-icon:hover {
    background-color: yellow;
    color: #000000;
}

.nav-item {
    color: #ffffff;
    font-family: "Times New Roman", sans-serif;
    text-decoration: none;
    font-size: 20px;
    margin-right: 20px;
    padding: 5px 10px;
    transition: background-color 0.3s ease;
}

.nav-item:hover {
    background-color: yellow;
    color: #000000;
}

.nav-item.contacts {
    margin-left: auto;
}

main {
    flex: 1;
    padding: 20px;
    z-index: 1;
}

footer {
    background-color: #112240;
    padding: 10px 20px;
    text-align: center;
    z-index: 1;
}

.footer-container {
    color: #ffffff;
    font-size: 20px;
}

.stars-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.usage-text {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: rgba(17, 34, 64, 0.8);
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    line-height: 1.6;
}

.usage-text h2 {
    color: #64ffda;
    margin-bottom: 20px;
    text-align: center;
}

.usage-text p {
    margin-bottom: 15px;
    text-align: justify;
}

.usage-text strong {
    color: #64ffda;
}