/**
 * Navigator Header 样式
 * 包含 TopUtilityBar 和 MainHeader 的样式
 */

/* ==================== TopUtilityBar 样式 ==================== */
.nav-top-utility-bar {
    background-color: var(--nav-primary);
    color: white;
    padding: 0.5rem 0;
    font-size: 0.875rem;
}

.nav-top-utility-bar a {
    color: white;
    text-decoration: none;
    transition: var(--nav-transition);
}

.nav-top-utility-bar a:hover {
    color: var(--nav-accent);
}

.nav-top-utility-bar .nav-search-input {
    width: 18rem;
    height: 2rem;
    padding: 0 0.5rem;
    padding-right: 2rem;
    font-size: 0.875rem;
    border-radius: 0.25rem;
    border: 1px solid var(--nav-border);
    background-color: white;
    color: var(--nav-dark);
}

.nav-top-utility-bar .nav-search-input:focus {
    outline: none;
    ring: 1px solid var(--nav-primary);
}

.nav-top-utility-bar .nav-search-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--nav-muted);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
}

.nav-top-utility-bar .nav-search-btn:hover {
    color: var(--nav-primary);
}

/* ==================== MainHeader 样式 ==================== */
.nav-main-header {
    background-color: white;
    box-shadow: var(--nav-shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-main-header nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

/* Logo 样式 */
.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo img {
    height: 2.5rem;
    margin-right: 0.5rem;
}

.nav-logo-text {
    display: flex;
    flex-direction: column;
}

.nav-logo-title {
    font-weight: bold;
    color: var(--nav-primary);
    font-size: 1.25rem;
    line-height: 1.2;
}

.nav-logo-subtitle {
    font-size: 0.75rem;
    color: var(--nav-muted);
}

/* 桌面导航菜单 */
.nav-desktop-menu {
    display: none;
    list-style: none;
    margin: 0;
    margin-left: auto;
    margin-right: 2rem;
    padding: 0;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .nav-desktop-menu {
        display: flex;
    }
}

.nav-desktop-menu > li {
    position: relative;
}

.nav-desktop-menu > li > a {
    color: var(--nav-dark);
    text-decoration: none;
    font-weight: 400;
    transition: var(--nav-transition);
    display: flex;
    align-items: center;
}

.nav-desktop-menu > li > a:hover {
    color: var(--nav-secondary);
}

.nav-desktop-menu > li.current-menu-item > a,
.nav-desktop-menu > li.nav-active > a {
    color: var(--nav-primary);
    font-weight: 500;
}

/* 下拉菜单 */
.nav-desktop-menu .sub-menu {
    position: absolute;
    left: 0;
    margin-top: 0;
    width: 14rem;
    background-color: white;
    box-shadow: var(--nav-shadow-lg);
    border-radius: 0.375rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--nav-transition);
    z-index: 40;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-desktop-menu > li:hover .sub-menu {
    opacity: 1;
    visibility: visible;
}

.nav-desktop-menu .sub-menu li {
    margin: 0;
}

.nav-desktop-menu .sub-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--nav-dark);
    text-decoration: none;
    transition: var(--nav-transition);
}

.nav-desktop-menu .sub-menu a:hover {
    background-color: var(--nav-light);
}

/* 搜索框（主导航栏） */
.nav-header-search {
    display: none;
    position: relative;
}

@media (min-width: 768px) {
    .nav-header-search {
        display: flex;
        align-items: center;
    }
}

.nav-search-toggle {
    background: none;
    border: none;
    color: var(--nav-dark);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--nav-transition);
}

.nav-search-toggle:hover {
    color: var(--nav-primary);
}

.nav-search-dropdown {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 0.5rem;
    background: white;
    box-shadow: var(--nav-shadow-lg);
    border-radius: 0.375rem;
    padding: 0.75rem;
    min-width: 20rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: all 0.2s ease;
    z-index: 100;
}

.nav-search-dropdown.nav-active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-search-dropdown form {
    position: relative;
    display: flex;
}

.nav-search-dropdown .nav-search-input {
    flex: 1;
    height: 2.5rem;
    padding: 0 0.75rem;
    padding-right: 2.5rem;
    font-size: 0.875rem;
    border-radius: 0.375rem;
    border: 1px solid var(--nav-border);
    background-color: var(--nav-light);
    color: var(--nav-dark);
    transition: var(--nav-transition);
}

.nav-search-dropdown .nav-search-input:focus {
    outline: none;
    border-color: var(--nav-primary);
    background-color: white;
}

.nav-search-dropdown .nav-search-submit-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--nav-muted);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--nav-transition);
}

.nav-search-dropdown .nav-search-submit-btn:hover {
    color: var(--nav-primary);
}

/* 移动端菜单按钮 */
.nav-mobile-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--nav-dark);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
}

@media (min-width: 768px) {
    .nav-mobile-toggle {
        display: none;
    }
}

/* 移动端菜单 */
.nav-mobile-menu {
    display: block;
    background-color: white;
    box-shadow: var(--nav-shadow-md);
    position: absolute;
    width: 100%;
    left: 0;
    top: 100%;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--nav-transition);
}

@media (min-width: 768px) {
    .nav-mobile-menu {
        display: none;
    }
}

.nav-mobile-menu.nav-active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.nav-mobile-menu ul {
    list-style: none;
    margin: 0;
    padding: 0.75rem 0;
}

.nav-mobile-menu li {
    margin: 0;
}

.nav-mobile-menu a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--nav-dark);
    text-decoration: none;
}

.nav-mobile-menu li.current-menu-item > a,
.nav-mobile-menu li.nav-active > a {
    color: var(--nav-primary);
    font-weight: 500;
}

.nav-mobile-menu .nav-mobile-search {
    padding: 0 1rem;
    margin-top: 0.5rem;
}

.nav-mobile-menu .nav-mobile-search input {
    width: 100%;
    padding: 0.5rem 1rem;
    padding-right: 2.5rem;
    border: 1px solid var(--nav-border);
    border-radius: 0.375rem;
}

.nav-mobile-menu .nav-mobile-search input:focus {
    outline: none;
    border-color: var(--nav-primary);
}

/* ==================== 响应式调整 ==================== */
@media (max-width: 480px) {
    .nav-logo img {
        height: 2rem;
    }

    .nav-logo-title {
        font-size: 1rem;
    }

    .nav-logo-subtitle {
        font-size: 0.625rem;
    }

    .nav-top-utility-bar {
        font-size: 0.75rem;
    }
}