/**
 * 溙鼎環境科技 - Portfolio 頁面樣式
 * 
 * 功能：
 * - 篩選器樣式優化（手機滑動版）
 * - 案例卡片懸停特效
 * - 分頁導航樣式
 * - 響應式設計
 * 
 * 修改日期：2024年
 */

/* ============================================
   篩選器樣式（手機滑動版）
   ============================================ */

.portfolio-filter {
    padding: 2rem 0;
    background: var(--color-bg-alt, #f8f9fa);
    border-bottom: 1px solid var(--color-border, #e0e0e0);
}

/* 篩選器包裝容器 */
.filter-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

/* 滑動容器 */
.filter-scroll-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.filter-tags {
    display: flex;
    gap: 0.75rem;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: center;
    padding: 0.25rem 0.5rem;
    overflow-x: auto;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

/* 隱藏滾動條但保持功能 */
.filter-tags::-webkit-scrollbar {
    display: none; /* Chrome/Safari/Opera */
}

/* 桌面版：允許換行 */
@media (min-width: 769px) {
    .filter-tags {
        flex-wrap: wrap;
        justify-content: center;
        overflow-x: visible;
    }
    
    .filter-arrow {
        display: none !important;
    }
}

/* 篩選器按鈕 */
.filter-btn {
    padding: 0.6rem 1.5rem;
    background: #fff;
    border: 2px solid var(--color-border, #e0e0e0);
    border-radius: 50px;
    color: var(--color-text, #333);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    flex-shrink: 0;
}

.filter-btn:hover {
    border-color: var(--color-primary, #0a3d2e);
    color: var(--color-primary, #0a3d2e);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--color-primary, #0a3d2e);
    color: #fff;
    border-color: var(--color-primary, #0a3d2e);
    box-shadow: 0 4px 15px rgba(10, 61, 46, 0.3);
}

.filter-btn.active:hover {
    transform: translateY(-2px);
    color: #fff;
}

/* 左右箭頭按鈕 */
.filter-arrow {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--color-border, #e0e0e0);
    color: var(--color-text, #333);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    flex-shrink: 0;
    padding: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.filter-arrow svg {
    width: 18px;
    height: 18px;
}

.filter-arrow:hover:not(:disabled) {
    background: var(--color-primary, #0a3d2e);
    border-color: var(--color-primary, #0a3d2e);
    color: #fff;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(10, 61, 46, 0.25);
}

.filter-arrow:active:not(:disabled) {
    transform: scale(0.95);
}

/* 禁用狀態 */
.filter-arrow:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    box-shadow: none;
}

/* 篩選器載入中文字 */
.filter-loading-text {
    color: var(--text-light, #888);
    font-size: 0.9rem;
    padding: 0.5rem;
}

/* ============================================
   案例網格區塊
   ============================================ */

.portfolio-grid-section {
    padding: var(--space-xl, 3rem) 0;
    background: var(--color-bg, #fff);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

/* ============================================
   案例卡片 - 懸停特效
   ============================================ */

.portfolio-card {
    background: #fff;
    border: 1px solid var(--color-border, #e0e0e0);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    text-decoration: none;
    position: relative;
}

.portfolio-card:hover {
    transform: translateY(-12px);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.12),
        0 8px 16px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

.portfolio-card:hover .portfolio-cover {
    transform: scale(1.05);
}

.portfolio-card:hover .portfolio-info {
    background: linear-gradient(to bottom, #fff, #fafafa);
}

.portfolio-card:hover .portfolio-title {
    color: var(--color-primary, #0a3d2e);
}

.portfolio-card:hover .portfolio-link {
    color: var(--color-accent, #c9a961);
    transform: translateX(5px);
}

/* 卡片覆蓋區 */
.portfolio-cover {
    aspect-ratio: 16 / 10;
    position: relative;
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

/* 覆蓋圖案 */
.portfolio-pattern {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(201, 169, 97, 0.3), transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.1), transparent 50%);
}

/* 分類標籤 */
.portfolio-category {
    position: relative;
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-primary, #0a3d2e);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 卡片資訊區 */
.portfolio-info {
    padding: 1.5rem;
    transition: background 0.3s ease;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* 中繼資訊 */
.portfolio-meta {
    font-size: 0.8rem;
    color: var(--text-light, #888);
    margin-bottom: 0.5rem;
    letter-spacing: 0.03em;
}

.portfolio-meta span {
    margin: 0 0.25rem;
}

/* 標題 */
.portfolio-title {
    font-size: 1.15rem;
    color: var(--color-text, #333);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    font-weight: 600;
    transition: color 0.3s ease;
}

/* 概括 */
.portfolio-summary {
    font-size: 0.9rem;
    color: var(--text-light, #666);
    line-height: 1.6;
    margin-bottom: 1rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 標籤區 */
.portfolio-tags {
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.75rem;
    color: var(--color-accent, #c9a961);
    background: rgba(201, 169, 97, 0.12);
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    font-weight: 500;
}

/* 連結文字 */
.portfolio-link {
    color: var(--color-primary, #0a3d2e);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.portfolio-link::after {
    content: '→';
    transition: transform 0.3s ease;
}

.portfolio-card:hover .portfolio-link::after {
    transform: translateX(5px);
}

/* ============================================
   載入動畫
   ============================================ */

.portfolio-loading {
    padding: 4rem 2rem;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(10, 61, 46, 0.1);
    border-top-color: var(--color-primary, #0a3d2e);
    border-radius: 50%;
    animation: portfolio-spin 1s linear infinite;
    margin: 0 auto;
}

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

/* ============================================
   空狀態
   ============================================ */

.portfolio-empty {
    padding: 4rem 2rem;
    text-align: center;
}

.portfolio-empty svg {
    color: var(--color-border, #ccc);
}

/* ============================================
   滾動 reveal 動畫
   ============================================ */

.portfolio-card[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.portfolio-card[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 延遲動畫 */
.portfolio-card[data-reveal].revealed:nth-child(1) { transition-delay: 0s; }
.portfolio-card[data-reveal].revealed:nth-child(2) { transition-delay: 0.1s; }
.portfolio-card[data-reveal].revealed:nth-child(3) { transition-delay: 0.2s; }
.portfolio-card[data-reveal].revealed:nth-child(4) { transition-delay: 0.3s; }
.portfolio-card[data-reveal].revealed:nth-child(5) { transition-delay: 0.4s; }
.portfolio-card[data-reveal].revealed:nth-child(6) { transition-delay: 0.5s; }
.portfolio-card[data-reveal].revealed:nth-child(7) { transition-delay: 0.6s; }
.portfolio-card[data-reveal].revealed:nth-child(8) { transition-delay: 0.7s; }
.portfolio-card[data-reveal].revealed:nth-child(9) { transition-delay: 0.8s; }

/* ============================================
   響應式設計
   ============================================ */

/* 平板橫向 */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .portfolio-filter {
        padding: 1.5rem 0;
    }
    
    .filter-btn {
        padding: 0.5rem 1.2rem;
        font-size: 0.85rem;
    }
}

/* 平板直向 / 手機橫向 */
@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .portfolio-card {
        border-radius: 10px;
    }
    
    .portfolio-cover {
        aspect-ratio: 16 / 9;
    }
    
    .portfolio-info {
        padding: 1.25rem;
    }
    
    .portfolio-title {
        font-size: 1.05rem;
    }
    
    .portfolio-summary {
        font-size: 0.85rem;
        -webkit-line-clamp: 2;
    }
    
    .filter-tags {
        gap: 0.5rem;
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
    }
    
    .filter-btn {
        padding: 0.45rem 1rem;
        font-size: 0.8rem;
        flex-shrink: 0;
    }
}

/* 手機直向 */
@media (max-width: 480px) {
    .portfolio-grid {
        gap: 1rem;
    }
    
    .portfolio-info {
        padding: 1rem;
    }
    
    .portfolio-tags {
        gap: 0.35rem;
    }
    
    .tag {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }
    
    .portfolio-card:hover {
        transform: translateY(-6px);
    }
    
    /* 手機版箭頭稍微小一些 */
    .filter-arrow {
        width: 32px;
        height: 32px;
    }
    
    .filter-arrow svg {
        width: 16px;
        height: 16px;
    }
}

/* ============================================
   分頁導航樣式
   ============================================ */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border, #e0e0e0);
}

.pagination-btn {
    min-width: 40px;
    height: 40px;
    padding: 0 0.75rem;
    background: #fff;
    border: 2px solid var(--color-border, #e0e0e0);
    border-radius: 8px;
    color: var(--color-text, #333);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination-btn:hover:not(:disabled):not(.active) {
    border-color: var(--color-primary, #0a3d2e);
    color: var(--color-primary, #0a3d2e);
    transform: translateY(-2px);
}

.pagination-btn.active {
    background: var(--color-primary, #0a3d2e);
    color: #fff;
    border-color: var(--color-primary, #0a3d2e);
    box-shadow: 0 4px 12px rgba(10, 61, 46, 0.3);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-btn svg {
    width: 18px;
    height: 18px;
}

/* 省略號 */
.pagination-ellipsis {
    color: var(--text-light, #888);
    padding: 0 0.25rem;
    font-size: 0.9rem;
}

/* 響應式調整 */
@media (max-width: 768px) {
    .pagination {
        margin-top: 2rem;
        padding-top: 1.5rem;
    }
    
    .pagination-btn {
        min-width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .pagination {
        gap: 0.35rem;
    }
    
    .pagination-btn {
        min-width: 34px;
        height: 34px;
        font-size: 0.8rem;
        padding: 0 0.5rem;
    }
}