.site_header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 75px;
    background-color: var(--background_overlay);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 1000;
    display: flex;
    justify-content: center;
}

.header_inner {
    width: 90%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
}

.header_left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.brand_logo_img img {
    width: 34px;
    height: 34px;
    object-fit: contain;
    display: block;
    flex-shrink: 0;
}

.brand_group {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}

.brand_logo {
    font-family: var(--header_font);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text_primary);
    text-decoration: none;
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header_socials_row {
    display: none;
    gap: 5px;
    margin-top: 3px;
}

.header_social_icon {
    width: 20px;
    height: 20px;
    background-color: var(--background_panel);
    color: var(--text_secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    border-radius: var(--rad_small);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.header_social_icon:hover {
    background-color: var(--background_hover);
    color: var(--accent);
}

.header_right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Dropdown Submenu Styles */
.nav_item_dropdown_wrapper {
    position: relative;
    display: inline-block;
}

.nav_dropdown_menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    background-color: var(--background_panel, #1a1a1a);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--rad_small, 6px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    padding: 0.5rem 0;
    z-index: 1001;
}

.nav_item_dropdown_wrapper:hover .nav_dropdown_menu {
    display: flex;
    flex-direction: column;
}

.nav_dropdown_item {
    padding: 0.5rem 1rem;
    color: var(--text_secondary, #aaa);
    font-size: 0.85rem;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.nav_dropdown_item:hover {
    background-color: var(--background_hover, rgba(255, 255, 255, 0.05));
    color: var(--text_primary, #fff);
}

.menu_toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 34px;
    height: 34px;
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    z-index: 1002;
}

.menu_toggle_bar {
    width: 22px;
    height: 2px;
    background-color: var(--text_primary);
    border-radius: var(--rad_small);
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu_toggle[aria-expanded="true"] .menu_toggle_bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu_toggle[aria-expanded="true"] .menu_toggle_bar:nth-child(2) {
    opacity: 0;
}

.menu_toggle[aria-expanded="true"] .menu_toggle_bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile_nav_panel {
    position: fixed;
    top: 75px;
    left: 0;
    width: 100vw;
    max-height: calc(100vh - 75px);
    overflow-y: auto;
    background-color: var(--background_overlay);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 999;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem 2rem;
    gap: 1.5rem;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.mobile_nav_panel.is_open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mobile_nav_panel .nav_links {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.mobile_nav_panel .nav_item {
    font-size: 1rem;
}

/* Mobile dropdown handling (flattened or indented nicely) */
.mobile_nav_panel .nav_item_dropdown_wrapper {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.mobile_nav_panel .nav_dropdown_menu {
    display: flex;
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0.25rem 0 0.25rem 1rem;
    gap: 0.5rem;
}

.mobile_nav_panel .nav_dropdown_item {
    padding: 0.35rem 0;
    font-size: 0.95rem;
}

.mobile_nav_panel .header_socials_row {
    display: flex;
    gap: 10px;
    margin-top: 0.25rem;
}

.header_right .nav_links,
.header_right .btn_nav {
    display: none;
}

@media (min-width: 768px) {
    .site_header {
        height: 82px;
    }

    .header_inner {
        width: 85%;
        padding: 0 1.5rem;
    }

    .brand_logo_img img {
        width: 38px;
        height: 38px;
    }

    .brand_logo {
        font-size: 1.15rem;
    }

    .header_socials_row {
        display: flex;
    }

    .header_right {
        gap: 1.5rem;
    }

    .header_right .nav_links,
    .header_right .btn_nav {
        display: flex;
    }

    .nav_links {
        gap: 1.25rem;
    }

    .nav_item {
        font-size: 0.9rem;
    }

    .menu_toggle {
        display: none;
    }

    .mobile_nav_panel {
        display: none;
    }
}

@media (min-width: 1024px) {
    .site_header {
        height: 90px;
    }

    .header_inner {
        width: 60%;
        padding: 0 1vw;
    }

    .brand_logo_img img {
        width: 40px;
        height: 40px;
    }

    .brand_logo {
        font-size: 1.2rem;
    }

    .header_right {
        gap: 2rem;
    }

    .nav_links {
        gap: 1.5rem;
    }

    .nav_item {
        font-size: 0.95rem;
    }
}