/* =========================================================
   通用篩選與即時統計搜尋樣式庫 (Filter & Stats System)
   整合：前台雙欄側邊欄篩選、頂部即時統計搜尋條、後台篩選區域
   ========================================================= */

/* =========================================================
   1. 前台通用雙欄佈局 (共用：作品集、學習筆記、工具寶典等)
   ========================================================= */
.front-sidebar-layout {
    display: flex;
    gap: 40px;
    width: 100%;
    align-items: flex-start;
}

.front-sidebar {
    width: 280px;
    flex-shrink: 0;
}

.front-layout-main {
    flex: 1;
    min-width: 0;
}

/* =========================================================
   2. 前台側邊欄篩選器樣式 (共用：myblog.html 側邊欄)
   ========================================================= */
.filters-container {
    width: 100%;
    margin: 0;
    position: relative;
    z-index: 2;
}

.filter-section {
    margin-bottom: 30px;
}

.filter-section:last-child {
    margin-bottom: 0;
}

.filter-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--cyan, #00d9ff);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    opacity: 0.9;
}

.filter-title i {
    font-size: 12px;
}

.filter-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow: visible !important;
    max-height: none !important;
}

/* 側邊欄 2 欄網格布局 */
.filter-buttons.filter-grid,
.filters-container .filter-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    overflow: visible !important;
    max-height: none !important;
}

/* 側邊欄自動換行布局 (技術等) */
.filter-buttons.filter-wrap,
.filters-container .filter-wrap {
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
    gap: 6px;
    overflow: visible !important;
    max-height: none !important;
}

/* 側邊欄篩選按鈕本體 */
.filter-btn {
    width: 100%;
    padding: 8px 12px;
    min-height: 38px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
}

.filter-btn span {
    position: relative;
    z-index: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.filter-btn:hover {
    border-color: rgba(0, 217, 255, 0.4);
    background: rgba(0, 217, 255, 0.05);
    color: var(--cyan, #00d9ff);
    transform: translateY(-1px);
}

.filter-btn.active,
.filter-btn.is-active {
    background: rgba(0, 217, 255, 0.15);
    border-color: var(--cyan, #00d9ff);
    color: var(--cyan, #00d9ff);
    box-shadow: 0 0 15px rgba(0, 217, 255, 0.2);
}

/* 自動寬度按鈕 */
.filter-btn-auto {
    width: fit-content;
    padding: 6px 12px;
    font-size: 12px;
    white-space: nowrap;
    flex-shrink: 0;
}

/* =========================================================
   3. 頂部即時統計與搜尋列 (Top Stats Bar & Instant Search)
   ========================================================= */
.tool-stats-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 24px;
    padding: 12px 18px;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.tool-stats-chips {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

/* 即時統計膠囊標籤 */
.stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.stat-pill:hover,
.stat-pill.is-active,
.stat-pill.active {
    background: rgba(0, 217, 255, 0.12);
    border-color: rgba(0, 217, 255, 0.5);
    color: #00d9ff;
    transform: translateY(-1px);
    box-shadow: 0 0 12px rgba(0, 217, 255, 0.25);
}

.stat-pill .pill-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1px 6px;
    border-radius: 10px;
    font-size: 0.72rem;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.stat-pill.is-active .pill-count,
.stat-pill.active .pill-count {
    background: #00d9ff;
    color: #04101e;
    font-weight: 700;
}

/* 狀態圓點微光 */
.sc-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    display: inline-block;
}

/* 即時搜尋框 */
.tool-search-wrap {
    position: relative;
    display: flex;
    align-items: center;
    min-width: 220px;
    flex: 1 1 auto;
    max-width: 320px;
}

.tool-search-input {
    width: 100%;
    height: 38px;
    padding: 0 14px 0 36px;
    border-radius: 10px;
    background: rgba(2, 6, 23, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 0.85rem;
    transition: all 0.25s ease;
}

.tool-search-input:focus {
    outline: none;
    border-color: #00d9ff;
    box-shadow: 0 0 12px rgba(0, 217, 255, 0.3);
}

.tool-search-icon {
    position: absolute;
    left: 12px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
    pointer-events: none;
}

/* 查無結果優雅提示 */
.no-tools-placeholder {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    background: rgba(15, 23, 42, 0.4);
    border: 1px dashed rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    margin-bottom: 24px;
}

.empty-state-icon {
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.25);
    margin-bottom: 16px;
}

.empty-state-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.empty-state-desc {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
}

/* =========================================================
   4. 後台系統通用篩選卡片 (System / Admin Filter Card)
   ========================================================= */
.search-filter-form .filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.filter-flex {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.filter-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    font-weight: 600;
}

.filter-label i {
    color: #00d9ff;
    font-size: 1rem;
}

.filter-hint {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    font-style: italic;
}

.filter-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.filter-actions-inline {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.filter-actions-inline .btn {
    flex: 1;
    margin-top: auto;
}

.mobile-filter-toggle {
    display: none;
}

/* =========================================================
   5. 響應式優化 (RWD Breakpoints)
   ========================================================= */
@media (max-width: 992px) {
    .front-sidebar-layout {
        flex-direction: column;
        gap: 20px;
    }

    .front-sidebar {
        width: 100%;
        position: static;
        margin-bottom: 6px;
    }

    .filters-container {
        padding: 14px 16px;
        background: rgba(15, 23, 42, 0.6);
        backdrop-filter: blur(14px);
        border: 1px solid rgba(0, 217, 255, 0.2);
        border-radius: 16px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    }

    .filter-section {
        margin-bottom: 12px;
    }

    .filter-section:last-child {
        margin-bottom: 0;
    }

    .filter-title {
        font-size: 11.5px;
        letter-spacing: 1px;
        margin-bottom: 8px;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    /* 手機/平板版轉換為平滑橫向滾動膠囊列，消除長列表占用，隱藏滾輪更乾淨 */
    .filters-container .filter-buttons.filter-grid,
    .filters-container .filter-buttons.filter-wrap,
    .filter-buttons.filter-grid,
    .filter-buttons.filter-wrap {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        gap: 8px !important;
        padding: 2px 4px 8px 2px !important;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .filters-container .filter-buttons.filter-grid::-webkit-scrollbar,
    .filters-container .filter-buttons.filter-wrap::-webkit-scrollbar,
    .filter-buttons.filter-grid::-webkit-scrollbar,
    .filter-buttons.filter-wrap::-webkit-scrollbar {
        display: none;
        height: 0;
        width: 0;
    }

    /* 每個篩選按鈕轉為精緻自適應膠囊 */
    .filter-btn,
    .filter-btn-auto {
        width: auto !important;
        min-width: fit-content !important;
        flex-shrink: 0 !important;
        padding: 6px 14px !important;
        height: 34px !important;
        font-size: 12.5px !important;
        border-radius: 18px !important;
        white-space: nowrap !important;
        text-align: center !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        line-height: 1 !important;
        transform: none !important;
    }

    .filter-btn:hover {
        transform: translateY(-1px) !important;
    }

    .filter-btn.active,
    .filter-btn.is-active {
        background: rgba(0, 217, 255, 0.18) !important;
        border-color: #00d9ff !important;
        color: #00d9ff !important;
        box-shadow: 0 0 12px rgba(0, 217, 255, 0.3) !important;
    }
}

@media (max-width: 768px) {
    /* 頂部統計列與搜尋框垂直排列適應 */
    .tool-stats-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .tool-search-wrap {
        width: 100%;
        max-width: 100%;
    }

    /* 後台篩選卡片自適應 */
    .search-filter-form .filter-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .filter-actions {
        flex-direction: column;
    }

    .filter-actions .btn {
        width: 100%;
    }

    .mobile-filter-toggle {
        display: inline-flex !important;
        margin-left: auto;
    }

    .filter-card .sys-card-body {
        display: none !important;
    }

    .filter-card.active .sys-card-body {
        display: block !important;
    }

    .filter-card.active .mobile-filter-toggle i {
        transform: rotate(180deg);
    }

    .mobile-filter-toggle i {
        transition: transform 0.3s ease;
    }
}