/**
 * ORCA Post TOC - 簡約黑白風格
 * 使用 CSS 變數支援動態顏色設定
 */

/* ========================================
   CSS 變數預設值（會被 PHP 覆寫）
   ======================================== */
:root {
    --orca-toc-primary: #333333;
    --orca-toc-secondary: #000000;
    --orca-toc-desktop-bg: #fafafa;
    --orca-toc-desktop-border: #e5e5e5;
    --orca-toc-heading-color: #333333;
}

/* ========================================
   容器和整體佈局
   ======================================== */
.orca-toc-wrapper {
    position: relative;
    margin-bottom: 30px;
}

/* ========================================
   桌面版目錄（內嵌顯示）
   ======================================== */
.orca-toc-desktop {
    background: var(--orca-toc-desktop-bg);
    border: 1px solid var(--orca-toc-desktop-border);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    flex-direction: column;
}

.orca-toc-header {
    flex-shrink: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--orca-toc-heading-color);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.orca-toc-header-title {
    display: flex;
    align-items: center;
}

/* 桌面版收合按鈕 */
.orca-toc-desktop-collapse {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    color: var(--orca-toc-primary);
    cursor: pointer;
    transition: background 0.2s ease, transform 0.3s ease;
}

.orca-toc-desktop-collapse:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* 桌面版收合狀態 - 箭頭旋轉 */
.orca-toc-desktop.collapsed .orca-toc-desktop-collapse {
    transform: rotate(180deg);
}

/* 桌面版收合狀態 - 隱藏內容 */
.orca-toc-desktop.collapsed .orca-toc-list {
    display: none;
}

/* 桌面版收合狀態 - 調整標題間距 */
.orca-toc-desktop.collapsed .orca-toc-header {
    margin-bottom: 0;
}

/* 目錄列表 */
.orca-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
}

/* 目錄項目 */
.toc-item {
    margin: 0;
    padding: 6px 0;
    line-height: var(--orca-toc-line-height, 1.1);
}

.toc-item a {
    color: var(--orca-toc-link-color, var(--orca-toc-primary));
    text-decoration: none;
    transition: all 0.2s ease;
    display: block;
    padding: 4px 8px;
    border-radius: 4px;
}

.toc-item a:hover {
    color: var(--orca-toc-secondary);
    background-color: rgba(0, 0, 0, 0.05);
    padding-left: 12px;
}

.toc-item a:active {
    color: var(--orca-toc-secondary);
    font-weight: 500;
}

/* 活動項目 - 滾動到對應標題時高亮 */
.toc-item a.toc-active {
    color: var(--orca-toc-secondary);
    font-weight: 600;
    background-color: rgba(0, 0, 0, 0.08);
    padding-left: 12px;
    position: relative;
}

.toc-item a.toc-active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 70%;
    background: var(--orca-toc-secondary);
    border-radius: 2px;
}

/* H2 標題樣式 */
.toc-item.toc-h2 {
    margin-top: 8px;
}

.toc-item.toc-h2 a {
    font-weight: 500;
    font-size: var(--orca-toc-font-size, 14px);
    color: var(--orca-toc-link-color, var(--orca-toc-primary));
}

/* H3 標題樣式 */
.toc-item.toc-h3 a {
    font-size: calc(var(--orca-toc-font-size, 14px) - 1px);
    color: #666;
}

.toc-item.toc-h3 a:hover {
    color: #333;
}

.toc-item.toc-h3 a.toc-active {
    color: var(--orca-toc-secondary);
}

/* H4 標題樣式 */
.toc-item.toc-h4 a {
    font-size: calc(var(--orca-toc-font-size, 14px) - 2px);
    color: #999;
    margin-left: 10px;
}

.toc-item.toc-h4 a.toc-active {
    color: var(--orca-toc-secondary);
}

/* ========================================
   手機版：浮動按鈕
   ======================================== */
.orca-toc-mobile-toggle {
    display: none;
    position: fixed;
    z-index: 9998;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--orca-toc-secondary);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transition: all 0.3s ease;
    align-items: center;
    justify-content: center;
}

/* 按鈕位置（含偏移量） */
.orca-toc-wrapper[data-position="bottom-right"] .orca-toc-mobile-toggle {
    bottom: calc(20px + var(--orca-toc-btn-offset-y, 0px));
    right: calc(20px + var(--orca-toc-btn-offset-x, 0px));
}

.orca-toc-wrapper[data-position="bottom-left"] .orca-toc-mobile-toggle {
    bottom: calc(20px + var(--orca-toc-btn-offset-y, 0px));
    left: calc(20px + var(--orca-toc-btn-offset-x, 0px));
}

.orca-toc-wrapper[data-position="top-right"] .orca-toc-mobile-toggle {
    top: calc(80px + var(--orca-toc-btn-offset-y, 0px));
    right: calc(20px + var(--orca-toc-btn-offset-x, 0px));
}

.orca-toc-wrapper[data-position="top-left"] .orca-toc-mobile-toggle {
    top: calc(80px + var(--orca-toc-btn-offset-y, 0px));
    left: calc(20px + var(--orca-toc-btn-offset-x, 0px));
}

.orca-toc-mobile-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
}

.orca-toc-mobile-toggle:active {
    transform: scale(0.95);
}

/* 保護 SVG 不被佈景主題全域 reset 覆蓋（如 Hello Elementor 的 svg { max-width:100%; height:auto } ） */
.orca-toc-desktop-collapse svg {
    width: 16px;
    height: 16px;
    min-width: 16px;
    min-height: 16px;
    flex-shrink: 0;
}

.orca-toc-mobile-toggle svg {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
    flex-shrink: 0;
}

/* ========================================
   手機版：背景遮罩
   ======================================== */
.orca-toc-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.orca-toc-overlay.active {
    opacity: 1;
}

/* ========================================
   手機版：滑出面板
   ======================================== */
.orca-toc-panel {
    display: none;
    position: fixed;
    z-index: 9999;
    background: #fff;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    /* 預設滿版 */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 100%;
    transform: translateY(100%);
    border-radius: 16px 16px 0 0;
}

/* 面板位置 - 根據按鈕位置決定從哪邊滑出 */
.orca-toc-wrapper[data-position="bottom-right"] .orca-toc-panel,
.orca-toc-wrapper[data-position="bottom-left"] .orca-toc-panel {
    top: auto;
    bottom: 0;
    height: 70vh;
    max-height: 70vh;
    transform: translateY(100%);
    border-radius: 16px 16px 0 0;
}

.orca-toc-wrapper[data-position="top-right"] .orca-toc-panel,
.orca-toc-wrapper[data-position="top-left"] .orca-toc-panel {
    top: 0;
    bottom: auto;
    height: 70vh;
    max-height: 70vh;
    transform: translateY(-100%);
    border-radius: 0 0 16px 16px;
}

.orca-toc-panel.active {
    transform: translateY(0) !important;
    display: flex !important;
    flex-direction: column;
}

/* 面板頭部 */
.orca-toc-panel-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--orca-toc-secondary);
    color: white;
}

.orca-toc-panel-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* 按鈕群組 */
.orca-toc-panel-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.orca-toc-panel-collapse,
.orca-toc-panel-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.3s ease;
}

.orca-toc-panel-collapse:hover,
.orca-toc-panel-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.orca-toc-panel-collapse svg,
.orca-toc-panel-close svg {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
    flex-shrink: 0;
}

/* 收合狀態 - 箭頭旋轉 */
.orca-toc-panel.collapsed .orca-toc-panel-collapse {
    transform: rotate(180deg);
}

/* 收合狀態 - 隱藏內容 */
.orca-toc-panel.collapsed .orca-toc-panel-body {
    display: none;
}

/* 收合狀態 - 面板高度縮小 */
.orca-toc-panel.collapsed {
    height: auto !important;
    max-height: none !important;
}

/* 面板內容 */
.orca-toc-panel-body {
    flex: 1;
    padding: 16px 20px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.orca-toc-panel-body .orca-toc-list {
    padding: 0;
}

.orca-toc-panel-body .toc-item {
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
}

.orca-toc-panel-body .toc-item:last-child {
    border-bottom: none;
}

.orca-toc-panel-body .toc-item a {
    font-size: 15px;
    padding: 8px 12px;
}

/* ========================================
   響應式設計
   ======================================== */
@media (max-width: 768px) {
    /* 隱藏桌面版目錄 */
    .orca-toc-desktop {
        display: none !important;
    }

    /* 顯示手機版浮動按鈕 */
    .orca-toc-mobile-toggle {
        display: flex !important;
    }

    /* 遮罩和面板預設隱藏，由 JS 控制 */
    .orca-toc-overlay {
        display: none;
    }

    .orca-toc-panel {
        display: none;
    }

    /* 確保面板滿版且內容可見 - 必須用 flex 才能讓 body 正確滾動 */
    .orca-toc-panel.active {
        display: flex !important;
        flex-direction: column;
    }

    .orca-toc-overlay.active {
        display: block !important;
    }

    /* 確保面板內容可滾動 */
    .orca-toc-panel-body {
        flex: 1;
        min-height: 0; /* 修復 flex 容器內的 overflow 問題 */
        overflow-y: auto;
    }
}

/* 桌面版隱藏手機元素 */
@media (min-width: 769px) {
    .orca-toc-mobile-toggle,
    .orca-toc-overlay,
    .orca-toc-panel {
        display: none !important;
    }

    .orca-toc-desktop {
        display: block !important;
    }
}

/* ========================================
   滾動條樣式
   ======================================== */
.orca-toc-desktop .orca-toc-list::-webkit-scrollbar,
.orca-toc-panel-body::-webkit-scrollbar {
    width: 6px;
}

.orca-toc-desktop .orca-toc-list::-webkit-scrollbar-track,
.orca-toc-panel-body::-webkit-scrollbar-track {
    background: transparent;
}

.orca-toc-desktop .orca-toc-list::-webkit-scrollbar-thumb,
.orca-toc-panel-body::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

.orca-toc-desktop .orca-toc-list::-webkit-scrollbar-thumb:hover,
.orca-toc-panel-body::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* ========================================
   深色模式支援
   ======================================== */
@media (prefers-color-scheme: dark) {
    .orca-toc-desktop {
        background: #1a1a1a;
        border-color: #333;
    }

    .orca-toc-header {
        color: #e0e0e0;
    }

    .toc-item a {
        color: #ccc;
    }

    .toc-item a:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: #fff;
    }

    .toc-item.toc-h3 a {
        color: #888;
    }

    .toc-item.toc-h3 a:hover {
        color: #ccc;
    }

    .toc-item.toc-h4 a {
        color: #666;
    }

    .toc-item a.toc-active {
        color: #fff;
        background-color: rgba(255, 255, 255, 0.15);
    }

    .toc-item a.toc-active::before {
        background: #fff;
    }

    .orca-toc-panel {
        background: #1a1a1a;
    }

    .orca-toc-panel-body .toc-item {
        border-bottom-color: #333;
    }

    .orca-toc-panel-body .toc-item a {
        color: #ccc;
    }

    .orca-toc-desktop-collapse {
        background: rgba(255, 255, 255, 0.1);
        color: #ccc;
    }

    .orca-toc-desktop-collapse:hover {
        background: rgba(255, 255, 255, 0.2);
    }
}