@import url('./design-system.css');

@media (max-width: 768px) {
    /* 手機版：僅首頁保留頂部導航；其他頁面不預留 header 空間 */
    body.home-page main.scroll-container {
        padding-top: var(--header-height) !important;
        margin-top: 0 !important;
    }

    body:not(.home-page) main.scroll-container {
        padding-top: 0 !important;
        margin-top: 0 !important;
    }

    /* 首頁 hero 維持貼頂 */
    body.home-page:has(.hero) main.scroll-container {
        padding-top: 0 !important;
    }

    /* 全幅頂部視覺頁（探索）維持貼頂 */
    body:has(.explore-header) main.scroll-container {
        padding-top: 0 !important;
    }
}
@media (max-width: 768px) {
    /* explore-header 貼齊最上方；上下等距 padding 由 trip-explore.css 控制 */
    .explore-header {
        margin-top: 0 !important;
    }
}

/* ==========================================
   GLOBAL CSS VARIABLES - 全域 CSS 變數
   所有頁面共用的設計系統
   ========================================== */
:root {
    /* ===== Colors - 別名指向 design-system.css（勿在此寫死品牌 hex）===== */
    --primary-color: var(--color-primary);
    --primary-dark: var(--color-primary-dark);
    --primary-light: var(--color-primary-light);
    --accent-color: var(--color-accent);
    --accent-dark: var(--color-accent-dark);
    --accent-light: var(--color-brand-orange-soft);
    --success-color: var(--color-success);
    --success-dark: var(--color-success-dark);
    --danger-color: var(--color-danger);
    --danger-dark: var(--color-danger-dark);
    --danger-bg: var(--color-danger-soft);
    --danger-border: var(--color-danger-border);
    --danger-text: var(--color-danger-text);
    --warning-color: var(--color-warning);
    --warning-bg: var(--color-warning-soft);
    --info-color: var(--color-primary);
    
    /* Text Colors */
    --text-primary: var(--color-text-strong);
    --text-secondary: var(--color-text);
    --text-tertiary: var(--color-text-muted);
    --text-quaternary: var(--color-text-muted);
    --text-disabled: var(--color-border);
    
    /* Background Colors */
    --bg-primary: var(--color-surface);
    --bg-secondary: var(--color-surface-muted);
    --bg-tertiary: var(--color-surface-muted);
    --bg-quaternary: var(--color-border);
    
    /* Border Colors */
    --border-color: var(--color-border);
    --border-light: var(--color-border);
    --border-dark: var(--color-text-muted);
    
    /* Badge Colors */
    --badge-verified-bg: #d4edda;
    --badge-verified-text: #155724;
    --badge-phone-bg: #cce5ff;
    --badge-phone-text: #004085;
    
    /* ===== Spacing - 間距（8px grid system） ===== */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-base: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --spacing-3xl: 40px;
    --spacing-4xl: 48px;
    --spacing-5xl: 64px;
    
    /* ===== Border Radius - 圓角 ===== */
    --radius-xs: 0.25rem;  /* 4px */
    --radius-sm: 0.375rem; /* 6px */
    --radius-md: 0.5rem;   /* 8px */
    --radius-lg: 0.75rem;  /* 12px */
    --radius-xl: 1rem;     /* 16px */
    --radius-2xl: 1.5rem;  /* 24px */
    --radius-full: 9999px;
    
    /* ===== Shadows - 陰影 ===== */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* ===== Typography - 字型 ===== */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 2rem;      /* 32px */
    --font-size-4xl: 2.5rem;    /* 40px */
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* ===== Transitions - 動畫過渡 ===== */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
    --transition-slower: 0.5s ease;
    
    /* ===== Z-index - 層級 ===== */
    --z-base: 1;
    --z-dropdown: 50;
    --z-sticky: 100;
    --z-modal-backdrop: 1000;
    --z-modal: 1001;
    --z-toast: 2000;
}

/* =============================
     共用篩選器 RWD 響應式設定
     ============================= */
@media (max-width: 768px) {
    .filter-search-bar {
        flex-direction: column;
        gap: 0.75rem;
        padding: 1.25rem;
        width: calc(100% - 2rem);
        min-width: 320px;
        max-width: 500px;
        height: auto;
        margin-left: auto;
        margin-right: auto;
    }
    .filter-input-group {
        width: 100%;
        border-right: none !important;
        border-bottom: 1px solid #e5e7eb;
        padding: 14px 8px !important;
        height: auto;
        min-height: 70px;
        box-sizing: border-box;
    }
    .filter-input-group:last-of-type {
        border-bottom: none;
    }
    .filter-search-btn {
        width: 100%;
        padding: 1.25rem;
        border-radius: 8px;
        font-size: 1rem;
        margin-top: 10px !important;
    }
}

/* 手機版：僅首頁顯示頂部導航（含語言切換器）；其餘頁面隱藏，避免遮擋內容 */
@media (max-width: 768px) {
    body.home-page .header {
        display: block !important;
    }

    body:not(.home-page) .header,
    body:not(.home-page) #header-placeholder,
    body.no-top-nav .header,
    body.no-top-nav #header-placeholder {
        display: none !important;
    }

    body.no-top-nav main.scroll-container {
        padding-top: 0 !important;
    }

    /* 次級頁：header 在 main 上方，用 flex 分配剩餘高度，確保表單可捲動到底 */
    body:has(.sub-page-header) {
        display: flex;
        flex-direction: column;
        height: 100dvh;
        height: calc(var(--vh, 1vh) * 100);
        overflow: hidden;
    }

    body:has(.sub-page-header) .sub-page-header {
        flex-shrink: 0;
    }

    body:has(.sub-page-header) #header-placeholder,
    body:has(.sub-page-header) #footer-placeholder,
    body:has(.sub-page-header) #mobile-bottom-nav-placeholder {
        display: none !important;
    }

    body:has(.sub-page-header) main.scroll-container {
        flex: 1 1 auto;
        min-height: 0 !important;
        height: auto !important;
        padding-top: 0 !important;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: max(32px, calc(16px + env(safe-area-inset-bottom, 0px))) !important;
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-left: auto;
        flex-shrink: 0;
    }

    .header-actions #lang-switcher {
        margin-left: 0;
        font-size: 13px;
        padding: 5px 8px;
        padding-right: calc(8px + 12px + 6px);
    }
}

/* 首頁 hero 區塊的篩選框 padding 調整 */
.search-bar-container.hero-btn-reveal {
    padding: 1rem !important;
}
/* 平板和手機版面配置 */
@media (max-width: 768px) {
    /* 🔥 手機版減少 container 的 padding，讓內容更寬 */
    
    /* 隱藏 footer（因為有底部導航欄） */
    .footer {
        display: none !important;
    }

    /* 隱藏 footer placeholder */
    #footer-placeholder {
        display: none !important;
    }

    /* 給 main 元素添加下邊距，避免被固定的底部導航欄遮擋 */
    /* 使用 max() 確保足夠空間，包含安全區域 */
    main.scroll-container {
        padding-bottom: max(72px, calc(48px + env(safe-area-inset-bottom)));
    }

    /* 次級頁（有返回按鈕）不顯示底部導航欄，移除多餘下邊距 */
    body.no-bottom-nav:not(:has(.sub-page-header)) main.scroll-container {
        padding-bottom: max(24px, env(safe-area-inset-bottom));
    }

    body.no-bottom-nav #mobile-bottom-nav-placeholder,
    body:has(.sub-page-header) #mobile-bottom-nav-placeholder {
        display: none !important;
    }

    /* 導航欄 */
    .nav-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        bottom: 0;  /* 改用 bottom: 0 取代 height: calc(100vh - 70px) */
        background: var(--white);
        padding: 2rem 1rem;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
        z-index: 1000;
        overflow-y: auto;
        animation: slideDown 0.3s ease-out;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu .nav-link {
        width: 100%;
        text-align: center;
        padding: 1rem;
        font-size: 1.1rem;
        border-radius: 0.5rem;
        transition: all 0.2s;
    }

    .nav-menu .nav-link:hover {
        background-color: #f9fafb;
    }

    .nav-menu .nav-link.button {
        background: #fbbf24;
        color: #1f2937;
        width: 80%;
        max-width: 300px;
    }

    .nav-menu .nav-link.button:hover {
        background: #f59e0b;
    }

    .menu-toggle {
        display: none;
        flex-direction: column;
        justify-content: space-around;
        width: 30px;
        height: 25px;
        cursor: pointer;
        z-index: 1001;
    }

    .menu-toggle span {
        display: block;
        width: 100%;
        height: 3px;
        background: var(--text-color);
        transition: all 0.3s ease;
        border-radius: 2px;
    }

    /* 漢堡包選單動畫 */
    .menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    /* 英雄區塊 */
    .hero-content {
        padding: 0 10px !important; /* 🔥 減少 hero-content 的 padding */
        max-width: 100% !important;
    }
    
    .hero h1 {
        font-size: 2rem; /* 🔥 從 2.5rem 減小到 2rem */
        line-height: 1.3;
    }

    .hero p {
        font-size: 1rem; /* 🔥 從 1.2rem 減小到 1rem */
        line-height: 1.5;
    }

    .mobile-break {
        display: none;
    }

    .hero-title {
        font-size: 2rem !important; /* 與 .section-title 一致 */
        line-height: 1.3;
        white-space: normal;
    }

    /* 中文標語：以 390px 等常見手機寬度為基準，維持單行且字級盡量大 */
    html[lang="zh-TW"] .hero-title,
    html[lang="zh"] .hero-title {
        white-space: nowrap;
        font-size: clamp(1.42rem, 0.6rem + 3.8vw, 1.72rem) !important;
        letter-spacing: -0.025em;
    }

    .hero-subtitle {
        font-size: 1rem; /* 🔥 從 1.1rem 減小到 1rem */
        line-height: 1.5;
    }

    /* 搜索框手機版 */
    .search-bar-container {
    /* 搜尋欄 input-group 高度統一 */
    .input-group {
        height: 70px !important;
        min-height: 70px !important;
        box-sizing: border-box;
    }
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.25rem;
    width: calc(100% - 2rem);
    min-width: 320px;
    max-width: 500px;
    height: 400px !important;
    margin-left: auto;
    margin-right: auto;
    }

    .input-group {
        width: 100%;
        border-right: none !important;
        border-bottom: 1px solid #e5e7eb;
    padding: 14px 8px !important;
    }

    .input-group:last-of-type {
        border-bottom: none;
    }

    .search-btn {
    width: 100%;
    padding: 1.25rem;
    border-radius: 8px;
    font-size: 1rem;
    margin-top: 10px !important;
    }

    /* 減少標題的下方距離，從 3rem (48px) 改為 8px */
    .section-title {
        margin-bottom: 8px !important;
    }

    /* 熱門旅程：手機版原生左右滑，露出下一張小角（非 JS carousel） */
    .carousel-container {
        margin-top: 8px !important;
        padding: 0 !important;
    }

    .carousel-container .carousel-btn {
        display: none !important;
    }
    
    .carousel-wrapper {
        overflow-x: auto;
        overflow-y: hidden;
        padding: 10px 16px 18px !important;
        margin: 0 !important;
        width: 100% !important;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        /* 允許在卡片上垂直滑動頁面，同時保留水平滑卡 */
        touch-action: pan-x pan-y;
        overscroll-behavior-x: contain;
        scrollbar-width: none;
    }

    .carousel-wrapper::-webkit-scrollbar {
        display: none;
    }

    .trips-carousel {
        display: flex;
        gap: 0.75rem;
        transform: none !important;
        transition: none !important;
        margin: 0 !important;
        padding: 0 16px 0 0 !important; /* 右側多留一點，最後一張也好滑 */
        width: max-content;
        max-width: none;
    }

    .trips-carousel .trip-card {
        /* ~72vw：卡片較小，頁面仍可上下滑；下一張仍露出一角 */
        width: 72vw;
        min-width: 72vw;
        max-width: 72vw;
        flex-shrink: 0;
        height: auto;
        margin: 0;
        scroll-snap-align: start;
        scroll-snap-stop: normal;
    }

    .trips-carousel .trip-card .trip-image,
    .trips-carousel .trip-card--overlay .trip-image {
        height: 190px;
    }

    .trips-carousel .trip-card .trip-content,
    .trips-carousel .trip-card--overlay .trip-content {
        padding: 12px;
    }
    
    /* 旅遊探索者：同上，原生滑動 + 露出下一張 */
    .explorers-carousel-container {
        position: relative;
        padding: 0;
        margin-top: 8px !important;
    }
    
    .explorers-wrapper {
        overflow-x: auto;
        overflow-y: hidden;
        padding: 0 16px !important;
        margin: 0 !important;
        width: 100% !important;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        touch-action: pan-x pan-y;
        overscroll-behavior-x: contain;
        scrollbar-width: none;
    }

    .explorers-wrapper::-webkit-scrollbar {
        display: none;
    }
    
    .explorers-grid {
        display: flex !important;
        gap: 0.75rem;
        transform: none !important;
        transition: none !important;
        margin: 0 !important;
        padding: 0 16px 0 0 !important;
        grid-template-columns: none !important;
        width: max-content !important;
        max-width: none !important;
    }
    
    .explorers-grid .explorer-card {
        width: 72vw;
        min-width: 72vw;
        max-width: 72vw;
        flex-shrink: 0;
        height: auto;
        margin: 0;
        scroll-snap-align: start;
        scroll-snap-stop: normal;
    }

    .explorers-grid .explorer-header {
        height: 190px;
    }

    /* 🔥 手機版收藏按鈕調整（與旅程卡片一致：右上） */
    .trip-image .trip-favorite,
    .explorer-header .explorer-favorite {
        width: 30px !important;
        height: 30px !important;
        top: 0.75rem !important;
        right: 0.75rem !important;
        bottom: auto !important;
    }
    
    .trip-image .trip-favorite i,
    .explorer-header .explorer-favorite i {
        font-size: 14px !important;
        color: #FF5E5E !important;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    /* 區塊標題 */
    .section-title {
    font-size: 1.5rem !important;
    font-weight: 500 !important;
    }

    /* 旅程卡片 */
    .trips-grid {
        grid-template-columns: 1fr;
    }

    /* 運作方式 */
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .step-card {
        padding: 1rem 1.15rem;
        gap: 0.35rem;
        border-radius: 14px;
        box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
    }

    .step-card__header {
        gap: 0.4rem;
        margin-bottom: 0.1rem;
    }

    .step-icon {
        font-size: 1.15rem;
    }

    .step-badge {
        font-size: 0.75rem;
        letter-spacing: 0.1em;
    }

    .step-card h3 {
        font-size: 1rem;
    }

    .step-card p {
        font-size: 0.875rem;
        line-height: 1.45;
    }

    /* 信任特性：手機改單欄；平板／桌面維持一行三欄 */
    .trust-features {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .trust-subtitle {
        font-size: 1rem;
    }


    /* 手機版全螢幕篩選彈層 + 淡入淡出動畫 */
    .mobile-filter-overlay {
        display: block;
        position: fixed;
        z-index: 9999;
        inset: 0;  /* 改用 inset: 0 取代 top/left/width/height，避免 100vh 問題 */
        pointer-events: none;
    }

    .mobile-filter-overlay,
    .mobile-filter-panel {
        transition: opacity 0.35s cubic-bezier(0.4,0,0.2,1),
                    transform 0.35s cubic-bezier(0.4,0,0.2,1),
                    background 0.35s cubic-bezier(0.4,0,0.2,1);
    }

    .mobile-filter-overlay {
        background: rgba(0,0,0,0);
        opacity: 0;
    }
    .mobile-filter-overlay.active {
        background: rgba(0,0,0,0.5);
        opacity: 1;
        pointer-events: auto;
    }

    .mobile-filter-panel {
        position: fixed;
        inset: 0;  /* 改用 inset: 0 取代 top/left/width/height，避免 100vh 問題 */
        background: #fff;
        border-radius: 0;
        box-shadow: none;
        padding: 1.5rem 1.25rem 2rem 1.25rem;
        transform: translateY(40px);
        opacity: 0;
        overflow-y: auto;
        z-index: 10000;
        display: flex;
        flex-direction: column;
    }
    .mobile-filter-overlay.active .mobile-filter-panel {
        transform: translateY(0);
        opacity: 1;
    }

    .mobile-filter-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid #e5e7eb;
    }

    .mobile-filter-title {
        font-size: 1.25rem;
        font-weight: 700;
        color: #1f2937;
    }

    .mobile-filter-close {
        background: transparent;
        border: none;
        font-size: 1.75rem;
        color: #6b7280;
        cursor: pointer;
        padding: 0;
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-filter-close:hover {
        color: #374151;
    }

    .mobile-filter-overlay .search-bar-container {
        box-shadow: none;
        border-radius: 0;
        background: transparent;
        width: 100%;
        max-width: 100%;
        min-width: 0;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        height: auto;
    }

    .mobile-filter-overlay .input-group {
    padding: 14px 8px !important;
        font-size: 1rem;
        border-radius: 12px;
        background: #f9fafb;
        border: 1px solid #e5e7eb;
        margin-bottom: 0;
    }

    .mobile-filter-overlay .input-group:hover {
        background: #f3f4f6;
    }

    .mobile-filter-overlay .label-text {
        font-size: 0.875rem;
        margin-bottom: 0.5rem;
    }

    .mobile-filter-overlay .full-click-input {
        font-size: 1rem;
    }

    .mobile-filter-overlay .search-btn {
        width: 100%;
        padding: 1.25rem;
        font-size: 1.1rem;
        border-radius: 12px;
        margin-top: 0.5rem;
    }
}

/* 桌面版面隱藏菜單按鈕 */
@media (min-width: 769px) {
    .nav-container {
        justify-content: flex-start;
    }

    .nav-menu {
        margin-left: auto;
        gap: 1.5rem;
    }

    .header-actions {
        margin-left: 1rem;
    }

    .menu-toggle {
        display: none;
    }

    /* 平板版以上隱藏手機版底部導航欄 */
    .mobile-bottom-nav {
        display: none !important;
    }

    /* 桌面版隱藏頂部導航欄中的收藏鏈接（因為收藏功能已在『我的』頁面中） */
    .nav-link[data-page="favorite"] {
        display: none !important;
    }

    /* 恢復桌面版頁腳樣式 - 使用高優先級確保不被其他 CSS 覆蓋 */
    .footer {
        display: block !important;
        background: #333 !important;
        color: white !important;
        padding: 4rem 0 2rem !important;
        margin-top: 4rem !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    /* 顯示桌面版頁腳內容 - 使用 grid 佈局 */
    .footer-content {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 2rem !important;
        max-width: 1200px !important;
        margin: 0 auto !important;
        padding: 0 20px !important;
    }
    
    .footer-bottom {
        display: block !important;
    }

    /* 顯示 footer placeholder */
    #footer-placeholder {
        display: block !important;
        width: 100% !important;
    }

    /* 移除 main 的下邊距 */
    main.scroll-container {
        padding-bottom: 0 !important;
    }
}

/* 小型手機版面配置 */
@media (max-width: 480px) {
    .hero-content {
        padding: 0 8px !important; /* 🔥 更小的 padding */
    }
    
    .hero h1 {
        font-size: 1.75rem; /* 🔥 從 2rem 減小到 1.75rem */
        line-height: 1.3;
    }

    .hero p {
        font-size: 0.95rem; /* 🔥 從 1rem 減小到 0.95rem */
        line-height: 1.5;
    }

    .mobile-break {
        display: inline;
    }

    .hero-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 0.95rem; /* 🔥 從 1rem 減小到 0.95rem */
        line-height: 1.5;
    }

    .section {
        padding: 3rem 0;
    }

    /* 480px 以下不需要此規則，因為 footer 已被隱藏 */

    /* 搜索框小手機版 - 更寬 */
    .search-bar-container {
        width: calc(100% - 1.5rem);
        min-width: 340px;
        max-width: 450px;
        padding: 1.5rem 1.25rem;
    }

    .input-group {
        padding: 1.5rem 1rem;
    }

    .search-btn {
        padding: 1.5rem;
        font-size: 1.1rem;
    }

    /* 熱門旅程 / 探索者 - 小手機版（仍露出下一張小角） */
    .trips-carousel,
    .explorers-grid {
        gap: 0.65rem;
    }

    .trips-carousel .trip-card,
    .explorers-grid .explorer-card {
        width: 74vw;
        min-width: 74vw;
        max-width: 74vw;
    }

    .trips-carousel .trip-card .trip-image,
    .trips-carousel .trip-card--overlay .trip-image {
        height: 190px;
    }

    .explorers-grid .explorer-header {
        height: 190px;
    }
}

@media (max-width: 299px) {
  .mobile-break { display: inline; }
}
@media (min-width: 300px) {
  .mobile-break { display: none !important; }
}

@media (min-width: 481px) and (max-width: 1024px) {
    .mobile-break { display: none !important; }
}

@media (max-width: 375px) {
  .search-bar-container {
    width: 100vw;
    min-width: 0;
    max-width: 100vw;
    left: 0;
    right: 0;
    margin: 0;
    border-radius: 0;
    box-sizing: border-box;
  }
}

/* 行動底部導航欄 - 已移至 src/components/layout/mobile-bottom-nav.css */
/* 該文件中的所有 mobile-bottom-nav 樣式已整合到專用組件文件 */

/* ==========================================
   頁面轉場動畫（次級頁面）
   ========================================== */

/* 次級頁面進入動畫：從右往左滑入 */
@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 次級頁面退出動畫：從左往右滑出 */
@keyframes slideOutToRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* 返回上一頁動畫：從左往右滑入 */
@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-30%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 次級頁面容器樣式 */
@media (max-width: 768px) {
    /* 應用於所有次級頁面 */
    body.page-entering .sub-page-container,
    body.page-entering main {
        animation: slideInFromRight 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    }
    
    body.page-returning .sub-page-container,
    body.page-returning main {
        animation: slideInFromLeft 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    }
    
    /* 確保頁面內容不會在動畫期間溢出 */
    body.page-entering,
    body.page-returning {
        overflow-x: hidden;
    }
}

/* Fade In 淡入動畫 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Float 漂浮動畫 - 適用於 empty state icon */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-12px);
    }
}

/* ==========================================
   共通 UI 元件樣式 - Common UI Components
   所有頁面可重用的組件樣式
   ========================================== */

/* ===== 1. 按鈕系統 - Button System ===== */

/* 主要按鈕 */
.btn-primary {
    background: var(--primary-color);
    color: #ffffff;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 次要按鈕 */
.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-tertiary);
    border-color: var(--border-dark);
}

/* 強調按鈕 */
.btn-accent {
    background: var(--accent-color);
    color: #ffffff;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.btn-accent:hover:not(:disabled) {
    background: var(--accent-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 危險按鈕 */
.btn-danger {
    background: var(--danger-color);
    color: #ffffff;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.btn-danger:hover:not(:disabled) {
    background: var(--danger-dark);
}

/* 文字按鈕 */
.btn-text {
    background: transparent;
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-text:hover:not(:disabled) {
    background: var(--bg-secondary);
    color: var(--primary-dark);
}

/* 小型按鈕 */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-base);
    font-size: var(--font-size-sm);
}

/* 大型按鈕 */
.btn-lg {
    padding: var(--spacing-base) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* 全寬按鈕 */
.btn-block {
    width: 100%;
    justify-content: center;
}

/* ===== 2. 卡片系統 - Card System ===== */

.card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0;
}

.card-body {
    padding: var(--spacing-xl);
}

.card-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

/* 可點擊卡片 */
.card-clickable {
    cursor: pointer;
    transition: all var(--transition-base);
}

.card-clickable:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== 3. 狀態標籤 - Status Badges ===== */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background-color: #dcfce7;
    color: #166534;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-info {
    background-color: #dbeafe;
    color: #1e40af;
}

.badge-primary {
    background-color: #dbeafe;
    color: #1e3a8a;
}

.badge-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* 狀態標籤別名 */
.status-open {
    background-color: #dcfce7;
    color: #166534;
}

.status-full {
    background-color: #fee2e2;
    color: #991b1b;
}

.status-upcoming {
    background-color: #dbeafe;
    color: #1e40af;
}

.status-closed {
    background-color: var(--bg-tertiary);
    color: var(--text-tertiary);
}

/* ===== 4. 標籤系統 - Tags System ===== */

.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.tag:hover {
    background: var(--bg-quaternary);
    color: var(--text-primary);
}

.tag-removable {
    padding-right: var(--spacing-sm);
    cursor: pointer;
}

.tag-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-tertiary);
    color: white;
    font-size: 12px;
    margin-left: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.tag-remove:hover {
    background: var(--danger-color);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* ===== 5. 表單元件 - Form Components ===== */

.form-group {
    margin-bottom: var(--spacing-xl);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.form-label .required {
    color: var(--danger-color);
    margin-left: var(--spacing-xs);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: all var(--transition-base);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control:disabled {
    background: var(--bg-tertiary);
    color: var(--text-disabled);
    cursor: not-allowed;
}

.form-control::placeholder {
    color: var(--text-tertiary);
}

/* Textarea */
textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* Select */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 1em;
    padding-right: 2.5rem;
    cursor: pointer;
}

/* Input Group */
.input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.input-group .form-control {
    flex: 1;
}

/* Form Helper Text */
.form-help {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

.form-error {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--danger-color);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-valid {
    border-color: var(--success-color);
}

/* Character Counter */
.character-count {
    text-align: right;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* ===== 6. 用戶/主機資訊 - User/Host Info ===== */

.user-avatar,
.host-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid var(--border-light);
}

.user-avatar-sm,
.host-avatar-sm {
    width: 32px;
    height: 32px;
}

.user-avatar-lg,
.host-avatar-lg {
    width: 64px;
    height: 64px;
}

.user-info,
.host-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-details,
.host-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.user-name,
.host-name {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.user-meta,
.host-meta {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ===== 7. 分隔線 - Dividers ===== */

.divider {
    border: none;
    border-top: 1px solid var(--border-light);
    margin: var(--spacing-xl) 0;
}

.divider-thick {
    border-top-width: 2px;
}

.divider-dashed {
    border-top-style: dashed;
}

/* ===== 8. 載入狀態 - Loading States ===== */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 25%,
        var(--bg-quaternary) 50%,
        var(--bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--spacing-sm);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
}

/* ===== 9. 空狀態 - Empty States ===== */

.empty-state {
    text-align: center;
    padding: var(--spacing-5xl) var(--spacing-xl);
    color: var(--text-tertiary);
    animation: fadeIn 0.3s ease-in;
}

.empty-state-icon {
    font-size: 5rem;
    width: 5rem;
    height: 5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-2xl);
    color: var(--primary-color);
    opacity: 0.3;
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.4px;
}

.empty-state-description {
    font-size: var(--font-size-base);
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.6;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* Empty State 內的按鈕樣式 */
.empty-state .btn-primary {
    margin: 0 auto;
}

/* 旅程日記、已完成等所有空狀態 - 確保完整顯示 */
#diaryEmpty,
#completedEmpty,
#upcomingHostedEmpty,
#upcomingJoinedEmpty,
#favTripsEmptyState,
#favExplorersEmptyState {
    display: flex !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#diaryEmpty .empty-state-icon,
#completedEmpty .empty-state-icon,
#upcomingHostedEmpty .empty-state-icon,
#upcomingJoinedEmpty .empty-state-icon,
#favTripsEmptyState .empty-state-icon,
#favExplorersEmptyState .empty-state-icon {
    font-size: 5rem;
    width: 5rem;
    height: 5rem;
    display: flex !important;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-2xl);
    color: var(--primary-color);
    opacity: 0.3;
}

/* 舊類名的相容性支援 - 以防有些地方還在使用舊結構 */
.empty-icon {
    font-size: 5rem;
    display: inline-flex !important;
    margin-bottom: var(--spacing-2xl);
    color: var(--primary-color);
    opacity: 0.3;
}

.empty-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.4px;
}

.empty-text {
    font-size: var(--font-size-base);
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.6;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== 10. 工具類 - Utility Classes ===== */

/* Text Utilities */
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-tertiary { color: var(--text-tertiary) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }

/* Background Utilities */
.bg-primary { background: var(--bg-primary) !important; }
.bg-secondary { background: var(--bg-secondary) !important; }
.bg-tertiary { background: var(--bg-tertiary) !important; }

/* Spacing Utilities */
.mt-0 { margin-top: 0 !important; }
.mt-sm { margin-top: var(--spacing-sm) !important; }
.mt-md { margin-top: var(--spacing-md) !important; }
.mt-lg { margin-top: var(--spacing-lg) !important; }
.mt-xl { margin-top: var(--spacing-xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-sm { margin-bottom: var(--spacing-sm) !important; }
.mb-md { margin-bottom: var(--spacing-md) !important; }
.mb-lg { margin-bottom: var(--spacing-lg) !important; }
.mb-xl { margin-bottom: var(--spacing-xl) !important; }

.p-0 { padding: 0 !important; }
.p-sm { padding: var(--spacing-sm) !important; }
.p-md { padding: var(--spacing-md) !important; }
.p-lg { padding: var(--spacing-lg) !important; }
.p-xl { padding: var(--spacing-xl) !important; }

/* Display Utilities */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }

/* Flex Utilities */
.flex-column { flex-direction: column !important; }
.flex-wrap { flex-wrap: wrap !important; }
.justify-start { justify-content: flex-start !important; }
.justify-center { justify-content: center !important; }
.justify-end { justify-content: flex-end !important; }
.justify-between { justify-content: space-between !important; }
.align-start { align-items: flex-start !important; }
.align-center { align-items: center !important; }
.align-end { align-items: flex-end !important; }
.gap-sm { gap: var(--spacing-sm) !important; }
.gap-md { gap: var(--spacing-md) !important; }
.gap-lg { gap: var(--spacing-lg) !important; }

/* Text Alignment */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

/* Font Weight */
.fw-normal { font-weight: var(--font-weight-normal) !important; }
.fw-medium { font-weight: var(--font-weight-medium) !important; }
.fw-semibold { font-weight: var(--font-weight-semibold) !important; }
.fw-bold { font-weight: var(--font-weight-bold) !important; }

/* Border Radius */
.rounded-sm { border-radius: var(--radius-sm) !important; }
.rounded-md { border-radius: var(--radius-md) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }

/* Shadow */
.shadow-none { box-shadow: none !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }

/* ==========================================
   COMMON UI COMPONENTS - 共通 UI 元件
   所有頁面共用的元件樣式
   ========================================== */

/* ===== Button System - 按鈕系統 ===== */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-size: var(--font-size-base);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-dark);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-base);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-base) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== Card System - 卡片系統 ===== */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-base);
    padding-bottom: var(--spacing-base);
    border-bottom: 1px solid var(--border-light);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: 0;
}

.card-body {
    padding: var(--spacing-base) 0;
}

.card-footer {
    margin-top: var(--spacing-base);
    padding-top: var(--spacing-base);
    border-top: 1px solid var(--border-light);
}

/* ===== Badge & Status System - 徽章和狀態系統 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    gap: var(--spacing-xs);
}

.badge-verified {
    background: var(--badge-verified-bg);
    color: var(--badge-verified-text);
}

.badge-phone {
    background: var(--badge-phone-bg);
    color: var(--badge-phone-text);
}

.status-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.status-recruiting {
    background: #dcfce7;
    color: #166534;
}

.status-full {
    background: #fef3c7;
    color: #92400e;
}

.status-completed {
    background: #e0e7ff;
    color: #3730a3;
}

.status-cancelled {
    background: #fee2e2;
    color: #991b1b;
}

/* 🔥 新增：applicant / pending 狀態 */
.status-applicant {
    background: #e0e7ff;
    color: #3730a3;
}

/* ===== Form Elements - 表單元素 ===== */
.form-group {
    margin-bottom: var(--spacing-xl);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control:disabled {
    background: var(--bg-secondary);
    color: var(--text-disabled);
    cursor: not-allowed;
}

.form-control::placeholder {
    color: var(--text-quaternary);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-error {
    color: var(--danger-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.form-help {
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* ===== Tag System - 標籤系統 ===== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--bg-quaternary);
}

.tag-removable {
    padding-right: var(--spacing-sm);
}

.tag-remove {
    cursor: pointer;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.tag-remove:hover {
    color: var(--danger-color);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* ===== Avatar & User Info - 頭像和用戶資訊 ===== */
.avatar {
    border-radius: var(--radius-full);
    object-fit: cover;
    background: var(--bg-tertiary);
}

.avatar-sm {
    width: 32px;
    height: 32px;
}

.avatar-md {
    width: 48px;
    height: 48px;
}

.avatar-lg {
    width: 64px;
    height: 64px;
}

.avatar-xl {
    width: 96px;
    height: 96px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-name {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: 0;
}

.user-meta {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

/* ===== Loading State - 載入狀態 ===== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--primary-color);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Divider - 分隔線 ===== */
.divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--spacing-xl) 0;
}

.divider-vertical {
    width: 1px;
    background: var(--border-light);
    margin: 0 var(--spacing-base);
}

/* ===== Alert System - 提示系統 ===== */
.alert {
    padding: var(--spacing-base) var(--spacing-xl);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    margin-bottom: var(--spacing-base);
}

/* 收藏頁面 Tabs 樣式 */
.tab-btn {
    background: none;
    border: none;
    outline: none;
    font-size: 1rem;
    font-weight: 500;
    color: #6b7280;
    padding: 0.75rem 1.5rem 0.5rem 1.5rem;
    border-bottom: 2.5px solid transparent;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    border-radius: 0;
    background: transparent;
    position: relative;
    margin-bottom: -2.5px;
}

.tab-btn:hover,
.tab-btn:focus {
    color: var(--color-primary);
    background: #f3f4f6;
}

.tab-btn.active-tab,
.tab-btn.active {
    color: var(--color-primary);
    border-bottom: 2.5px solid var(--color-primary);
    background: #f9fafb;
    font-weight: 600;
    z-index: 1;
}

.tab-count {
    font-size: 0.95em;
    color: #9ca3af;
    margin-left: 0.25em;
}

.alert-info {
    background: #dbeafe;
    border-color: var(--info-color);
    color: #1e3a8a;
}

.alert-success {
    background: #d1fae5;
    border-color: var(--success-color);
    color: #065f46;
}

.alert-warning {
    background: var(--warning-bg);
    border-color: var(--warning-color);
    color: #78350f;
}

.alert-danger {
    background: var(--danger-bg);
    border-color: var(--danger-color);
    color: var(--danger-text);
}

/* ==========================================
   Mobile Footer Hide - 手機版 Footer 隱藏
   確保底部導航欄不被 Footer 遮擋
   ========================================== */
@media (max-width: 768px) {
    #footer-placeholder {
        display: none !important;
    }
}