.tf_nav {
    background: var(--body-background);
    padding: 0.3rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 4px #00000022;
    color: var(--text-color);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

.tf_nav_container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    height: 32px;
}

.tf_logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 4rem;
    height: 100%;
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
}

.tf_logo svg {
    width: 20px;
    height: 20px;
}

.tf_menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    list-style: none;
    margin: 0;
    padding: 0;
    height: 100%;
    margin-right: auto;
}

.tf_menu_item {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.tf_menu_link {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.3rem;
    display: flex;
    align-items: center;
    height: 100%;
    transition: color 0.2s;
    font-size: 0.8rem;
    font-weight: 450;
}

.tf_menu_link:hover {
    color: var(--hover-color);
}

.tf_dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--body-background);
    min-width: 150px;
    border-radius: 4px;
    box-shadow: 0 4px 12px #00000033;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
}

.tf_menu_item:hover .tf_dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tf_dropdown_item {
    padding: 0.4rem 0.8rem;
    color: var(--text-color);
    text-decoration: none;
    display: block;
    transition: background-color 0.2s;
    font-size: 0.6rem;
}

.tf_dropdown_item:hover {
    background-color: #80808019;
}

.tf_right_controls {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-left: 2rem;
}

.tf_theme_toggle {
    background: none;
    border: 1px solid var(--text-color);
    border-radius: 50%;
    cursor: pointer;
    padding: 0.3rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    width: 28px;
    height: 28px;
}

.tf_theme_toggle:hover {
    background-color: #80808019;
    transform: scale(1.05);
}

.theme-icon {
    width: 14px;
    height: 14px;
    transition: all 0.2s;
}

.light-theme .theme-icon.light {
    display: none;
}

.light-theme .theme-icon.dark {
    display: block;
}

.theme-icon.light {
    display: block;
}

.theme-icon.dark {
    display: none;
}

.tf_login_btn {
    background: transparent;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 0.25rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.2s;
    font-weight: 500;
    font-size: 0.8125rem;
    cursor: pointer;
}

.tf_login_btn:hover {
    background: var(--text-color);
    color: var(--body-background);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px #0000001A;
}

.hamburger-menu {
    display: none;
    cursor: pointer;
    border: none;
    background: none;
    padding: 0.5rem;
    color: var(--text-color);
}

.hamburger-menu svg {
    width: 24px;
    height: 24px;
    color: var(--text-color);
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-overlay.active {
    display: block;
    opacity: 1;
}

@media (max-width: 768px) {
    .tf_menu {
        display: none;
        position: fixed;
        top: 48px;
        left: 0;
        right: 0;
        background: var(--body-background);
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
        height: auto;
        box-shadow: 0 4px 12px #00000033;
        z-index: 1000;
        max-height: calc(100vh - 48px);
        overflow-y: auto;
        transform: translateY(-100%);
        transition: transform 0.3s ease;
    }

    .tf_menu.active {
        display: flex;
        transform: translateY(0);
    }
    
    .tf_menu_item {
        height: auto;
        flex-direction: column;
        align-items: stretch;
    }

    .tf_menu_link {
        padding: 0.8rem;
        font-size: 1rem;
    }

    .tf_dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        margin: 0;
        padding-left: 1rem;
    }

    .tf_dropdown_item {
        font-size: 0.9rem;
        padding: 0.6rem 1rem;
    }
    
    .tf_logo {
        margin-right: 0;
    }

    .hamburger-menu {
        display: block;
        order: -1;
    }

    .tf_right_controls {
        margin-left: auto;
        gap: 1rem;
    }
}
