/* 导航栏基础样式 */
:root { --nav-height: 48px; }
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--layer-blur-bg);
    backdrop-filter: saturate(180%) blur(var(--backdrop-blur));
    -webkit-backdrop-filter: saturate(180%) blur(var(--backdrop-blur));
    border-bottom: 1px solid var(--color-border);
    transition: background-color 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* Stabilize layout across theme switches without clipping popovers */
    /* Avoid 'paint' containment which clips absolutely-positioned dropdowns */
    contain: layout style;
    overflow: visible;
}

/* Logo样式 */
.nav-logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-light);
    -webkit-tap-highlight-color: transparent;
}

.logo-img {
    height: 28px;
    margin-right: 8px;
    transition: transform 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.logo-text {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.022em;
}

/* 主导航菜单 */
.nav-menu {
    display: flex;
    gap: 32px;
    margin: 0 48px;
    flex: 1 1 auto;
    min-width: 0; /* allow menu to shrink without wrapping container */
    justify-content: center;
    flex-wrap: nowrap;            /* keep in one row */
    overflow: visible;            /* no horizontal scroll; JS collapses to More */
}

.nav-menu::-webkit-scrollbar { display: none; }

.nav-logo, .nav-actions { flex: 0 0 auto; }

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    flex: 0 0 auto;               /* prevent flex shrinking overlap */
    padding: 8px 0;
    transition: color 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
    letter-spacing: -0.016em;
    -webkit-tap-highlight-color: transparent;
    white-space: nowrap; /* prevent line breaks on theme switch */
    display: inline-flex;          /* 确保图标与文字沿中线对齐 */
    align-items: center;
    gap: 6px;
    line-height: 1.2;             /* 提供更充裕的行高，避免图标视觉裁切 */
}

.nav-link:hover {
    color: var(--pink-primary);
}

/* 下拉菜单样式 */
.nav-dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    touch-action: manipulation;
}

.dropdown-toggle i {
    font-size: 10px;
    transition: transform 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.dropdown-toggle.active i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--layer-blur-bg-strong);
    backdrop-filter: saturate(180%) blur(var(--backdrop-blur));
    -webkit-backdrop-filter: saturate(180%) blur(var(--backdrop-blur));
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 8px 0;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-10px);
    will-change: transform, opacity;
    transition: all 0.18s cubic-bezier(0.28, 0.11, 0.32, 1);
    box-shadow: var(--shadow-lg);
    margin-top: 8px;
}

/* Label inside More dropdown to group children of collapsed dropdowns */
.dropdown-item.label {
    font-weight: 600;
    color: var(--text-light);
    cursor: default;
    pointer-events: none;
    opacity: 0.9;
}

.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    padding: 8px 16px;
    font-size: 14px;
    letter-spacing: -0.016em;
    transition: background-color 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
    -webkit-tap-highlight-color: transparent;
}

.dropdown-item:hover {
    background-color: var(--surface-hover);
    color: var(--pink-primary);
}

/* 移动版下拉菜单样式 */
.mobile-dropdown {
    border-bottom: 1px solid var(--color-border);
}

.mobile-dropdown:last-child {
    border-bottom: none;
}

.mobile-dropdown .dropdown-toggle {
    justify-content: space-between;
}

.mobile-dropdown-menu {
    max-height: 0;
    overflow: hidden;
    background: var(--surface-overlay);
    transition: max-height 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.mobile-dropdown-menu.active {
    max-height: 300px;
}

.mobile-dropdown-item {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    padding: 12px 24px 12px 48px;
    font-size: 15px;
    letter-spacing: -0.020em;
    transition: background-color 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
    -webkit-tap-highlight-color: transparent;
    border-left: 2px solid transparent;
}

.mobile-dropdown-item:hover {
    background-color: var(--surface-hover);
    border-left-color: var(--pink-primary);
    color: var(--pink-primary);
}

/* 右侧操作区 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

/* Theme toggle button (defined once; see bottom for theme-switching rule) */

/* 语言选择器 */
.language-selector {
    position: relative;
    display: inline-flex;
    align-items: center;
    height: 32px;
    padding: 0 8px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--layer-blur-bg);
    backdrop-filter: saturate(180%) blur(24px);
    -webkit-backdrop-filter: saturate(180%) blur(24px);
}
.language-selector .icon-globe{
    font-size: 13px;
    color: var(--text-light);
    opacity: 0.85;
    margin-right: 6px;
    width: 14px;
    text-align: center;
}
.language-selector select {
    background: transparent !important;
    border: 0;
    border-radius: 999px;
    color: var(--text-light);
    font-size: 14px;
    font-weight: 500;
    height: 100%;
    padding: 0 24px 0 6px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23fff' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    transition: all 0.2s cubic-bezier(0.28, 0.11, 0.32, 1);
    letter-spacing: -0.016em;
    outline: none;
    width: auto;
    min-width: 80px;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 语言选择器下拉选项的磨砂效果 */
.language-selector select option {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-light);
    padding: 8px 12px;
}

/* Light mode language selector */
html[data-theme="light"] .language-selector {
    background: var(--layer-blur-bg);
    backdrop-filter: saturate(180%) blur(24px);
    -webkit-backdrop-filter: saturate(180%) blur(24px);
}
html[data-theme="light"] .language-selector select { color: var(--color-text); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%231d1d1f' d='M6 8L2 4h8z'/%3E%3C/svg%3E"); }
html[data-theme="light"] .language-selector .icon-globe { color: var(--color-text); opacity: 0.9; }

/* 亮色模式下拉选项的磨砂效果 */
html[data-theme="light"] .language-selector select option {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--color-text);
}

/* Keep select transparent to preserve frosted glass; move hover effects to container */
.language-selector select:hover { background-color: transparent; box-shadow: none; }
.language-selector:hover,
.language-selector:focus-within {
    background: var(--layer-blur-bg-strong);
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.language-selector select:focus-visible {
    outline: 2px solid transparent;
    box-shadow: 0 0 0 3px var(--accent-tint-20);
}

/* Mobile: full-width selector inside mobile menu */
.mobile-menu .language-selector select {
    width: 100%;
    min-width: 0;
    max-width: none;
}

@media (max-width: 768px) {
  .language-selector select {
    min-width: 72px;
    max-width: 108px;
  }
}

/* 登录按钮 */
.login-btn {
    background: var(--pink-primary);
    color: var(--text-light);
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 980px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
    letter-spacing: -0.016em;
    -webkit-tap-highlight-color: transparent;
}

.login-btn:hover {
    background: var(--pink-dark);
    transform: translateY(-1px);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    padding: 12px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.menu-icon {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-light);
    position: relative;
    transition: background-color 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.menu-icon::before,
.menu-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--text-light);
    transition: transform 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.menu-icon::before {
    top: -6px;
}

.menu-icon::after {
    bottom: -6px;
}

/* 移动端菜单打开状态 */
.mobile-menu-btn.active .menu-icon {
    background: transparent;
}

.mobile-menu-btn.active .menu-icon::before {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active .menu-icon::after {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--layer-blur-bg-strong);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-top: 1px solid var(--color-border);
    padding: 8px 0;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.mobile-menu.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    padding: 0;
}

.mobile-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 17px;
    padding: 12px 24px;
    letter-spacing: -0.022em;
    position: relative;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.3s cubic-bezier(0.28, 0.11, 0.32, 1);
}

.mobile-link::after {
    content: '';
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 0;
    height: 1px;
    background: var(--color-border);
}

.mobile-link:hover {
    background-color: var(--surface-subtle);
}

.mobile-language {
    padding: 12px 24px;
}

.mobile-language select {
    width: 100%;
    background: var(--layer-blur-bg);
    backdrop-filter: saturate(180%) blur(var(--backdrop-blur));
    -webkit-backdrop-filter: saturate(180%) blur(var(--backdrop-blur));
    border: 1px solid var(--color-border);
    border-radius: 12px;
    color: var(--text-light);
    font-size: 17px;
    font-weight: 500;
    height: 40px;
    padding: 0 40px 0 16px;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23fff' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    letter-spacing: -0.022em;
}

/* 移动端语言选择器下拉选项的磨砂效果 */
.mobile-language select option {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-light);
    padding: 12px 16px;
}

/* 响应式设计 - iPad */
@media (max-width: 1068px) {
    .nav-container {
        padding: 0 20px;
    }

    .nav-menu {
        gap: 22px;
        margin: 0 24px;
    }
}

/* Narrow desktop / large tablet: reduce spacing & font size to avoid crowding */
@media (max-width: 980px) {
    .nav-menu { gap: 18px; margin: 0 20px; }
    .nav-link { font-size: 13px; }
}

/* 响应式设计 - iPhone */
@media (max-width: 734px) {
    /* 移动端导航高度更小 */
    :root { --nav-height: 44px; }
    .nav-container {
        padding: 0 16px;
        height: var(--nav-height);
        justify-content: space-between;
        width: 100%;
    }

    .nav-menu {
        display: none;
    }

    .nav-actions {
        display: flex;
        gap: 16px;
        align-items: center;
    }

    .language-selector {
        display: block;
    }

    .language-selector select {
        padding: 4px 24px 4px 8px;
        font-size: 12px;
        background-position: right 6px center;
    }

    .login-btn {
        padding: 6px 16px;
        font-size: 12px;
    }

    .logo-img {
        height: 24px;
    }

    .logo-text {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
        padding: 8px;
        margin: 0;
    }

    .mobile-language { display: block; }
}

/* 响应式设计 - 小型iPhone */
@media (max-width: 374px) {
    .nav-container {
        padding: 0 12px;
    }

    .nav-actions {
        gap: 12px;
    }

    .language-selector select {
        padding: 4px 20px 4px 6px;
        font-size: 11px;
    }

    .login-btn {
        padding: 5px 12px;
        font-size: 11px;
    }
}

/* 添加到现有样式中 */
.nav-link[data-scroll-to],
.mobile-link[data-scroll-to] {
    cursor: pointer;
}

/* 当链接处于活动状态时的样式 */
.nav-link.active,
.mobile-link.active {
    color: var(--pink-primary);
}

/* User Menu Styles */
.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--pink-primary);
    color: var(--text-light);
    border: none;
    padding: 8px 16px;
    border-radius: 980px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.28, 0.11, 0.32, 1);
    touch-action: manipulation;
}

/* 预留图标占位，避免字体晚加载引起的布局抖动 */
.user-menu-btn i {
    width: 12px;               /* 与图标尺寸匹配的固定宽度 */
    display: inline-block;
    text-align: center;
}

.user-menu-btn:hover {
    background: var(--pink-dark);
}

.user-email {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-menu-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--layer-blur-bg-strong);
    backdrop-filter: saturate(180%) blur(20px);
    border-radius: 12px;
    min-width: 200px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    will-change: transform, opacity;
    transition: all 0.18s cubic-bezier(0.28, 0.11, 0.32, 1);
    z-index: 1000;
}

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

.user-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    transition: background-color 0.2s ease;
}

.user-menu-item:hover {
    background: var(--surface-hover);
}

.user-menu-item i {
    width: 16px;
    text-align: center;
}

.user-menu-divider {
    height: 1px;
    background: var(--color-border);
    margin: 4px 0;
}

/* 响应式调整 */
@media (max-width: 734px) {
    .user-menu-btn {
        padding: 6px 12px;
        font-size: 12px;
    }

    .user-email {
        max-width: 120px;
    }
} 
.theme-toggle{ border:1px solid var(--color-border); background:transparent; color: var(--text-light); border-radius:980px; padding:6px 10px; cursor:pointer; transition:background .2s, border-color .2s }
.theme-toggle:hover{ background: var(--surface-hover); border-color: var(--color-border) }
.theme-toggle i{ pointer-events:none; width:16px; text-align:center; display:inline-block }

/* During theme switch, disable transitions inside nav to avoid layout flicker */
html.theme-switching .nav, html.theme-switching .nav * { transition: none !important; }

/* Language-specific typographic tweaks */
/* Slightly bolder for Japanese to improve readability */
html[lang="ja"] .nav-link,
html[lang="ja"] .dropdown-item,
html[lang="ja"] .mobile-link { font-weight: 600; }

/* 通用：在导航内的 Font Awesome 图标预留宽度，减少 FOUT/FOIT 造成的闪动 */
.nav .fa, .nav .fas, .nav .fab, .nav .far, .nav .fal {
    display: inline-block;
    width: 1em;        /* 以当前字号的 1em 预留占位 */
    text-align: center;
}

/* 业务可选：Discord 图标预留固定宽度（若存在） */
.nav-actions .nav-discord i { width: 18px; display: inline-block; }
.nav-actions .nav-discord { display: inline-flex; align-items: center; gap: 6px; overflow: visible; padding-right: 2px; }
.nav-actions .nav-discord svg { width: 1em; height: 1em; display: inline-block; vertical-align: middle; overflow: visible; }

/* 小屏仅显示图标，隐藏导航栏中的“加入 Discord”文字 */
@media (max-width: 768px) {
  .nav-discord-text { display: none; }
}

/* 内联 SVG 图标的对齐与尺寸（用于下拉箭头） */
.icon-chevron { vertical-align: middle; }

/* Light mode navigation enhancements */
html[data-theme="light"] .nav {
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

/* Arabic typographic tweaks: avoid negative tracking */
html[dir="rtl"] .nav-link,
html[dir="rtl"] .dropdown-item,
html[dir="rtl"] .mobile-link,
html[dir="rtl"] .user-menu-item,
html[dir="rtl"] .user-email { letter-spacing: 0; }

html[data-theme="light"] .nav-link,
html[data-theme="light"] .mobile-link,
html[data-theme="light"] .dropdown-item,
html[data-theme="light"] .mobile-dropdown-item {
    color: var(--color-text);
}

html[data-theme="light"] .nav-link:hover,
html[data-theme="light"] .mobile-link:hover,
html[data-theme="light"] .dropdown-item:hover,
html[data-theme="light"] .mobile-dropdown-item:hover {
    color: var(--color-accent);
}

html[data-theme="light"] .dropdown-menu,
html[data-theme="light"] .mobile-menu {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.06);
}

html[data-theme="light"] .login-btn {
    background: var(--color-accent);
    color: #ffffff;
}

html[data-theme="light"] .login-btn:hover {
    background: var(--color-accent-strong);
}

html[data-theme="light"] .theme-toggle {
    border-color: rgba(0, 0, 0, 0.12);
    color: var(--color-text);
}

html[data-theme="light"] .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.04);
}

html[data-theme="light"] .menu-icon,
html[data-theme="light"] .menu-icon::before,
html[data-theme="light"] .menu-icon::after {
    background: var(--color-text);
}

html[data-theme="light"] .mobile-link::after {
    background: rgba(0, 0, 0, 0.06);
}

html[data-theme="light"] .mobile-language select {
    background: var(--surface-overlay);
    color: var(--color-text);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%231d1d1f' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
}

/* 亮色模式移动端下拉选项的磨砂效果 */
html[data-theme="light"] .mobile-language select option {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--color-text);
}

/* 全站隐藏主题切换按钮（按需可恢复） */
.theme-toggle { display: none !important; }

/* ===================== */
/* RTL minimal overrides */
/* ===================== */
/* Keep actions/login on the right in RTL (do NOT reverse container order) */
html[dir="rtl"] .nav-container { flex-direction: row; }
html[dir="rtl"] .logo-img { margin-right: 0; margin-left: 8px; }
html[dir="rtl"] .language-selector .icon-globe { margin-right: 0; margin-left: 6px; }
/* Keep user menu dropdown anchored to the right edge in RTL as well */
html[dir="rtl"] .user-menu-dropdown { right: 0; left: auto; }
/* Mobile dropdown indentation/border swap */
html[dir="rtl"] .mobile-dropdown-item { padding: 12px 48px 12px 24px; border-left: 0; border-right: 2px solid transparent; }
html[dir="rtl"] .mobile-dropdown-item:hover { border-right-color: var(--pink-primary); }