/* ============================================================
   BTID Explorer - 公共导航栏和底部栏样式
   使用设计系统变量
   ============================================================ */

/* ============================================================
   1. Premium Navigation Styles
   ============================================================ */

.premium-navbar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: var(--z-navbar, 1000) !important;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.04);
    box-shadow: 0 1px 0 0 rgba(255, 255, 255, 0.44) inset, 0 1px 3px 0 rgba(0, 0, 0, 0.12);
    transition: none !important;
    transform: translateZ(0) !important;
    will-change: auto !important;
    backface-visibility: hidden !important;
    height: var(--header-height, 72px) !important;
    contain: layout style !important;
}

.premium-navbar.scrolled {
    background: rgba(255, 255, 255, 0.06) !important;
    backdrop-filter: blur(12px) saturate(140%) !important;
    -webkit-backdrop-filter: blur(12px) saturate(140%) !important;
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.06) !important;
    box-shadow: 0 1px 0 0 rgba(255, 255, 255, 0.5) inset, 0 1px 5px 0 rgba(0, 0, 0, 0.15) !important;
    transition: none !important;
}

.navbar-container {
    /* 使用 rem 单位与 Tailwind 的 max-w-7xl 保持一致 */
    max-width: 80rem; /* 等同于 Tailwind 的 max-w-7xl */
    margin: 0 auto;
    /* 与主内容区域 max-w-7xl 的 px-4 sm:px-6 lg:px-8 保持一致 */
    padding: 0 1rem; /* 默认 px-4 = 1rem */
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height, 72px) !important;
    min-height: var(--header-height, 72px) !important;
    box-sizing: border-box !important;
}

/* 桌面端导航栏容器 - 与 Tailwind 响应式 padding 对齐 */
@media (min-width: 640px) {
    .navbar-container {
        padding: 0 1.5rem; /* sm:px-6 = 1.5rem */
    }
}

@media (min-width: 1024px) {
    .navbar-container {
        padding: 0 2rem; /* lg:px-8 = 2rem */
    }
}

/* 移动端导航栏容器 */
@media (max-width: 768px) {
    .premium-navbar {
        height: var(--header-height-mobile, 64px) !important;
    }
    
    .navbar-container {
        height: var(--header-height-mobile, 64px) !important;
        min-height: var(--header-height-mobile, 64px) !important;
        /* padding 已由响应式规则控制，与主内容区域保持一致 */
    }
}

/* ============================================================
   2. Navbar Brand
   ============================================================ */

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3, 12px);
    text-decoration: none;
    color: var(--color-text-primary, #1a1a1a);
    font-weight: var(--font-bold, 700);
    font-size: var(--text-2xl, 24px);
    transition: all var(--transition-base, 0.2s ease);
}

.navbar-brand:hover {
    color: var(--color-primary, #ff7a49);
    transform: translateY(-1px);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: var(--leading-tight, 1.2);
}

.brand-title {
    font-size: var(--text-xl, 20px);
    font-weight: var(--font-bold, 700);
    color: var(--color-text-primary, #1a1a1a);
}

.brand-subtitle {
    font-size: var(--text-xs, 12px);
    color: var(--color-text-secondary, #6b7280);
    font-weight: var(--font-medium, 500);
}

/* ============================================================
   3. Navbar Navigation
   ============================================================ */

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
    background: transparent !important;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    padding: var(--space-3, 12px) var(--space-4, 16px);
    text-decoration: none;
    color: var(--color-text-secondary, #4b5563);
    font-weight: var(--font-medium, 500);
    font-size: var(--text-base, 15px);
    border-radius: var(--radius-lg, 12px);
    transition: all var(--transition-base, 0.2s ease);
    position: relative;
    overflow: hidden;
    background: transparent !important;
    box-shadow: none !important;
}

.nav-link::before,
.nav-link::after {
    display: none !important;
}

.nav-link:hover {
    color: var(--color-primary, #ff7a49);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-primary-alpha-20, rgba(255, 122, 73, 0.2));
    background: transparent !important;
}

.nav-link.active {
    color: var(--color-primary, #ff7a49) !important;
    background: transparent !important;
    box-shadow: none !important;
}

.nav-icon {
    width: 18px;
    height: 18px;
    opacity: 0.8;
    transition: all var(--transition-base, 0.2s ease);
}

.nav-link:hover .nav-icon {
    opacity: 1;
    transform: scale(1.1);
}

/* ============================================================
   4. Theme Toggle Button
   ============================================================ */

.theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-md, 8px);
    background: transparent !important;
    color: var(--color-primary, #ff7a49);
    cursor: pointer;
    transition: all var(--transition-fast, 0.15s ease);
    position: relative;
    box-shadow: none !important;
}

.theme-toggle-btn::before,
.theme-toggle-btn::after {
    display: none !important;
}

.theme-toggle-btn:hover,
.theme-toggle-btn:active,
.theme-toggle-btn:focus {
    background: transparent !important;
    transform: none;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

.theme-icon {
    transition: opacity var(--transition-fast, 0.15s ease), color var(--transition-base, 0.2s ease);
    position: absolute;
}

.sun-icon {
    opacity: 0;
}

.moon-icon {
    opacity: 1;
}

/* ============================================================
   5. Mobile Menu
   ============================================================ */

.mobile-menu-button {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-2, 8px);
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-md, 8px);
    transition: all var(--transition-base, 0.2s ease);
}

.mobile-menu-button:hover {
    background: var(--color-primary-alpha-10, rgba(255, 122, 73, 0.1));
}

.mobile-menu-line {
    width: 24px;
    height: 2px;
    background: var(--color-text-secondary, #4b5563);
    border-radius: 1px;
    transition: all var(--transition-base, 0.2s ease);
}

.mobile-menu-button.active .mobile-menu-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-button.active .mobile-menu-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-button.active .mobile-menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: var(--shadow-lg, 0 8px 32px rgba(0, 0, 0, 0.1));
    padding: var(--space-4, 16px) var(--space-6, 24px);
}

.mobile-nav.active {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-nav .nav-link {
    display: block;
    padding: var(--space-4, 16px) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    margin-bottom: var(--space-2, 8px);
}

.mobile-nav .nav-link:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

/* ============================================================
   6. Dark Mode Styles
   ============================================================ */

.dark .premium-navbar {
    background: rgba(13, 17, 23, 0.10) !important;
    backdrop-filter: blur(12px) saturate(140%) !important;
    -webkit-backdrop-filter: blur(12px) saturate(140%) !important;
    border-bottom: 1px solid var(--color-border, rgba(240, 246, 252, 0.22)) !important;
    box-shadow: 0 1px 0 0 rgba(240, 246, 252, 0.06) inset, 0 6px 12px -6px rgba(0, 0, 0, 0.6) !important;
}

.dark .premium-navbar.scrolled {
    background: rgba(13, 17, 23, 0.12) !important;
    backdrop-filter: blur(12px) saturate(140%) !important;
    -webkit-backdrop-filter: blur(12px) saturate(140%) !important;
    border-bottom: 1px solid var(--color-border, rgba(240, 246, 252, 0.24)) !important;
    box-shadow: 0 1px 0 0 rgba(240, 246, 252, 0.08) inset, 0 6px 12px -6px rgba(0, 0, 0, 0.7) !important;
}

.dark .brand-title {
    color: var(--color-text-primary, #f0f6fc);
    text-shadow: 0 0 10px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.3));
}

.dark .brand-subtitle {
    color: var(--color-text-secondary, #8b949e);
}

.dark .nav-link {
    color: var(--color-text-secondary, #8b949e);
    transition: all var(--transition-base, 0.2s ease);
}

.dark .nav-link:hover {
    color: var(--color-primary, #ff7a49);
    background: transparent !important;
    box-shadow: none !important;
}

.dark .nav-link.active {
    color: var(--color-primary, #ff7a49) !important;
    background: transparent !important;
    box-shadow: none !important;
}

.dark .theme-toggle-btn {
    background: transparent !important;
    color: var(--color-text-secondary, #e2e8f0);
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

.dark .theme-toggle-btn:hover {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    transform: none;
}

.dark .sun-icon {
    opacity: 1;
    color: var(--color-primary, #ff7a49);
}

.dark .moon-icon {
    opacity: 0;
}

.dark .mobile-nav {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border, rgba(240, 246, 252, 0.12));
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.dark .mobile-menu-button {
    background: var(--color-bg-secondary, rgba(240, 246, 252, 0.05));
}

.dark .mobile-menu-button:hover {
    background: var(--color-primary-alpha-10, rgba(255, 122, 73, 0.1));
}

.dark .mobile-menu-line {
    background: var(--color-text-secondary, #8b949e);
}

.dark .mobile-menu-button.active .mobile-menu-line {
    background: var(--color-primary, #ff7a49);
}

.dark .mobile-nav .nav-link {
    border-bottom: 1px solid var(--color-border-light, rgba(240, 246, 252, 0.08));
}

/* Dark Footer */
.dark .border-t {
    border-color: var(--color-border, rgba(240, 246, 252, 0.12)) !important;
}

.dark .text-hiro-gray {
    color: var(--color-text-secondary, #8b949e) !important;
}

.dark a:not(.nav-link):not(.pagination-btn):not(.navbar-brand):not(.btn):not(.bottom-nav-item) {
    color: var(--color-primary, #ff7a49);
}

.dark a:not(.nav-link):not(.pagination-btn):not(.navbar-brand):not(.btn):not(.bottom-nav-item):hover {
    color: var(--color-primary-light, #fb923c);
    text-decoration: underline;
}

/* ============================================================
   7. Responsive - 移动端导航栏调整
   ============================================================ */

@media (max-width: 768px) {
    .navbar-nav {
        display: none;
    }

    .mobile-menu-button {
        display: none; /* 使用底部导航栏替代汉堡菜单 */
    }

    .navbar-container {
        height: var(--header-height-mobile, 64px);
        /* padding 已由响应式规则控制 */
    }

    /* 移动端显示品牌文字 */
    .brand-text {
        display: flex !important;
        flex-direction: column;
    }

    .brand-title {
        font-size: var(--text-lg, 18px) !important;
        font-weight: var(--font-bold, 700);
        line-height: var(--leading-snug, 1.3);
    }

    .brand-subtitle {
        font-size: var(--text-xs, 12px) !important;
        line-height: var(--leading-tight, 1.2);
    }

    .navbar-brand {
        font-size: var(--text-lg, 16px);
        gap: var(--space-2, 10px);
    }

    .navbar-brand img {
        width: 42px !important;
        height: 42px !important;
    }
}

/* Page content offset */
body {
    padding-top: var(--header-height, 72px);
}

main {
    position: relative;
    z-index: var(--z-base, 1);
    margin-top: 0;
}

@media (max-width: 768px) {
    body {
        padding-top: 0 !important;
        padding-bottom: var(--bottom-nav-height, 64px) !important;
    }
}

html {
    overflow-y: scroll;
}

/* ============================================================
   8. 移动端底部导航栏样式（iOS风格 + 滑动指示器）
   ============================================================ */

.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navbar, 1000);
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
    border-top: 0.5px solid rgba(0, 0, 0, 0.04);
    box-shadow: 0 -1px 0 0 rgba(255, 255, 255, 0.44) inset, 0 -1px 3px 0 rgba(0, 0, 0, 0.12);
    transform: translateZ(0);
    will-change: auto;
    backface-visibility: hidden;
    height: var(--bottom-nav-height, 64px);
    padding: 0;
    justify-content: space-around;
    align-items: center;
    transition: none;
    contain: layout style;
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-1, 4px);
    height: 100%;
    text-decoration: none !important;
    color: var(--color-text-secondary, #6b7280);
    transition: all 0.25s var(--ease-default, cubic-bezier(0.4, 0, 0.2, 1));
    position: relative;
    background: transparent;
    border: none;
    outline: none;
    padding: var(--space-2, 8px) var(--space-1, 4px);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* Ensure no underline on bottom nav items in any state */
.bottom-nav-item:hover,
.bottom-nav-item:active,
.bottom-nav-item:focus,
.bottom-nav-item.active {
    text-decoration: none !important;
}

.bottom-nav-icon {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    transition: all 0.25s var(--ease-default, cubic-bezier(0.4, 0, 0.2, 1));
    opacity: 0.65;
    stroke-width: 2;
}

.bottom-nav-text {
    font-size: var(--text-2xs, 10.5px);
    font-weight: var(--font-medium, 500);
    transition: all 0.25s var(--ease-default, cubic-bezier(0.4, 0, 0.2, 1));
    white-space: nowrap;
    letter-spacing: 0.3px;
    opacity: 0.85;
}

/* 激活状态 */
.bottom-nav-item.active {
    color: var(--color-primary, #ff7a49);
}

.bottom-nav-item.active .bottom-nav-icon {
    opacity: 1;
    transform: translateY(-1px) scale(1.08);
    stroke-width: 2.2;
    filter: drop-shadow(0 2px 4px var(--color-primary-alpha-20, rgba(255, 122, 73, 0.2)));
}

.bottom-nav-item.active .bottom-nav-text {
    font-weight: var(--font-semibold, 600);
    opacity: 1;
    letter-spacing: 0.4px;
}

/* 点击效果 */
.bottom-nav-item:active {
    transform: scale(0.92);
    transition-duration: 0.1s;
}

/* 底部活动指示条（滑动条） */
.mobile-bottom-nav::after {
    content: '';
    position: absolute;
    bottom: 1px;
    left: 0;
    width: 25%;
    height: 3px;
    background: linear-gradient(90deg, 
        rgba(255, 122, 73, 0) 0%,
        rgba(255, 122, 73, 0.8) 10%,
        var(--color-primary, #ff7a49) 50%,
        rgba(255, 122, 73, 0.8) 90%,
        rgba(255, 122, 73, 0) 100%
    );
    border-radius: 2px 2px 0 0;
    transition: all 0.35s var(--ease-bounce, cubic-bezier(0.34, 1.56, 0.64, 1));
    box-shadow: 0 -1px 8px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.4)),
                0 -2px 4px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.3));
    transform: translateX(0);
    will-change: transform;
}

/* 滑动指示条位置 */
.mobile-bottom-nav[data-active="0"]::after { transform: translateX(0); }
.mobile-bottom-nav[data-active="1"]::after { transform: translateX(100%); }
.mobile-bottom-nav[data-active="2"]::after { transform: translateX(200%); }
.mobile-bottom-nav[data-active="3"]::after { transform: translateX(300%); }

/* 详情页时隐藏滑动指示条（data-active="-1"）- 直接隐藏无动画 */
.mobile-bottom-nav[data-active="-1"]::after {
    display: none !important;
}

/* 移动端显示底部导航栏 */
@media (max-width: 768px) {
    .mobile-bottom-nav {
        display: flex;
    }

    main {
        margin-bottom: 0;
        min-height: calc(100vh - var(--header-height-mobile, 64px) - var(--bottom-nav-height, 64px));
    }
}

/* 移动端主题切换按钮 */
.mobile-theme-toggle {
    display: none;
}

@media (max-width: 768px) {
    .mobile-theme-toggle {
        display: flex;
    }
}

/* 暗黑模式下的底部导航栏 */
.dark .mobile-bottom-nav {
    background: rgba(13, 17, 23, 0.10);
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
    border-top: 1px solid var(--color-border, rgba(240, 246, 252, 0.22));
    box-shadow: 0 -1px 0 0 rgba(240, 246, 252, 0.06) inset, 0 -6px 12px -6px rgba(0, 0, 0, 0.6);
}

.dark .bottom-nav-item {
    color: var(--color-text-secondary, #8b949e);
}

.dark .bottom-nav-item.active {
    color: var(--color-primary-light, #ff9d6e);
}

.dark .bottom-nav-item.active .bottom-nav-icon {
    opacity: 1;
    filter: drop-shadow(0 0 12px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.6))) 
            drop-shadow(0 2px 6px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.4)));
    stroke-width: 2.3;
}

.dark .bottom-nav-item.active .bottom-nav-text {
    color: var(--color-primary-light, #ff9d6e);
    text-shadow: 0 0 8px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.4));
}

.dark .bottom-nav-item:active {
    background: var(--color-primary-alpha-10, rgba(255, 122, 73, 0.12));
}

/* 暗黑模式下的滑动指示条 */
.dark .mobile-bottom-nav::after {
    background: linear-gradient(90deg, 
        rgba(255, 157, 110, 0) 0%,
        rgba(255, 157, 110, 0.6) 5%,
        rgba(255, 122, 73, 0.9) 20%,
        var(--color-primary, #ff7a49) 50%,
        rgba(255, 122, 73, 0.9) 80%,
        rgba(255, 157, 110, 0.6) 95%,
        rgba(255, 157, 110, 0) 100%
    );
    height: 3.5px;
    box-shadow: 0 0 16px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.7)),
                0 0 8px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.5)),
                0 -2px 12px var(--color-primary-alpha-30, rgba(255, 122, 73, 0.4));
    filter: brightness(1.15);
}

/* ============================================================
   8. 可点击链接悬停下划线效果
   ============================================================ */

/* 悬停显示底部下划线的链接样式 */
.link-hover-underline {
    position: relative;
    display: inline-block;
    cursor: pointer;
    transition: color 0.2s ease;
}

.link-hover-underline::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.25s ease;
}

.link-hover-underline:hover::after {
    transform: scaleX(1);
}

/* 橙色链接的下划线 */
.link-hover-underline.text-hiro-orange::after {
    background: var(--color-primary, #ff7a49);
}

/* 整行可点击的表格行样式 */
.table-row-clickable {
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.table-row-clickable:hover {
    background-color: rgba(255, 122, 73, 0.05);
}

.table-row-clickable:active {
    background-color: rgba(255, 122, 73, 0.1);
}

/* 暗黑模式下的悬停下划线 */
.dark .link-hover-underline.text-hiro-orange::after {
    background: var(--color-primary-light, #ff9d6e);
}

.dark .table-row-clickable:hover {
    background-color: rgba(255, 122, 73, 0.08);
}

.dark .table-row-clickable:active {
    background-color: rgba(255, 122, 73, 0.15);
}