#header_div {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo img {
    height: 50px;
    width: auto;
}

.menu ol {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.menu a:hover {
    color: var(--secondary-color);
}

.menu .button {
    padding: 10px 20px;
    border: 1px solid var(--secondary-color);
    border-radius: 4px;
    color: var(--secondary-color);
}

.menu .button:hover {
    background-color: rgba(100, 255, 218, 0.1);
}

.language-selector {
    display: flex;
    gap: 10px;
    margin-right: 20px;
}

.flag-icon {
    width: 24px;
    height: 24px;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.flag-icon.active {
    opacity: 1;
}

.flag-icon:hover {
    opacity: 0.8;
}