/**
 * 甘特图布局样式
 * 路径: css/gantt-layout.css
 * 版本: Epsilon6 - 拖拽调整宽度版
 * 包含: 容器、侧边栏、时间轴、行列布局、层级样式
 */

/* ======================
   甘特图容器
   ====================== */
.gantt-container {
    background: white;
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--shadow-md);
    margin-bottom: 15px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

.gantt-wrapper {
    display: flex;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    overflow: hidden;
    flex: 1;
    min-height: 350px;
    transition: height 0.3s ease;
}

#pertContainer {
    background: white;
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--shadow-md);
    margin-bottom: 15px;
    overflow: auto;
}

/* ======================
   ⭐ 左侧任务名称列（支持拖拽调整宽度）
   ====================== */
.gantt-sidebar {
    width: var(--sidebar-width);
    min-width: 100px;
    max-width: 400px;
    border-right: 2px solid var(--gray-300);
    background: var(--gray-50);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: none; /* ⭐ 移除过渡，支持平滑拖拽 */
}

/* ⭐ 拖拽手柄 */
.sidebar-resize-handle {
    position: absolute;
    top: 0;
    right: -4px;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    z-index: 10;
    background: transparent;
    transition: background 0.2s ease;
}

.sidebar-resize-handle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 3px;
    height: 40px;
    background: linear-gradient(to bottom, 
        transparent, 
        rgba(102, 126, 234, 0.3) 20%, 
        rgba(102, 126, 234, 0.6) 50%, 
        rgba(102, 126, 234, 0.3) 80%, 
        transparent);
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.sidebar-resize-handle:hover::before {
    opacity: 1;
}

.sidebar-resize-handle:active::before {
    background: linear-gradient(to bottom, 
        transparent, 
        rgba(102, 126, 234, 0.5) 20%, 
        rgba(102, 126, 234, 0.8) 50%, 
        rgba(102, 126, 234, 0.5) 80%, 
        transparent);
    width: 4px;
}

.gantt-sidebar.resizing {
    user-select: none;
}

.gantt-sidebar-header {
    padding: 12px 8px;
    background: var(--gray-200);
    font-weight: 600;
    border-bottom: 2px solid var(--gray-300);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-normal);
    font-size: 0.85rem;
}

.gantt-sidebar-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

/* 任务名称基础样式 */
.gantt-task-name {
    padding: 10px 8px;
    border-bottom: 1px solid var(--gray-300);
    height: var(--row-height);
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: background var(--transition-fast), 
                opacity var(--transition-normal);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    position: relative;
}

.gantt-task-name:hover {
    background: rgba(102, 126, 234, 0.05);
    padding-right: 8px;
    border-left: 3px solid rgba(102, 126, 234, 0.4);
    padding-left: 5px;
}

.gantt-task-name.selected {
    background: #cfe2ff;
    font-weight: 600;
}

.gantt-task-name.dep-highlight {
    background: rgba(16, 185, 129, 0.1);
    border-left: 3px solid var(--success-color);
}

/* 层级缩进样式 */
.gantt-task-name[data-outline-level="1"] {
    font-weight: 600;
    font-size: 0.9rem;
    background: linear-gradient(to right, rgba(102, 126, 234, 0.05) 0%, transparent 50%);
}

.gantt-task-name[data-outline-level="2"] {
    padding-left: 28px;
    font-size: 0.85rem;
}

.gantt-task-name[data-outline-level="2"]::before {
    content: '├─';
    position: absolute;
    left: 10px;
    color: #dee2e6;
    font-weight: normal;
}

.gantt-task-name[data-outline-level="3"] {
    padding-left: 52px;
    font-size: 0.8rem;
    color: #6c757d;
}

.gantt-task-name[data-outline-level="3"]::before {
    content: '│ ├─';
    position: absolute;
    left: 10px;
    color: #dee2e6;
    font-weight: normal;
}

.gantt-task-name[data-outline-level="4"] {
    padding-left: 76px;
    font-size: 0.75rem;
    color: #adb5bd;
}

.gantt-task-name[data-outline-level="4"]::before {
    content: '│ │ ├─';
    position: absolute;
    left: 10px;
    color: #dee2e6;
    font-weight: normal;
}

.gantt-task-name[data-outline-level="5"] {
    padding-left: 100px;
    font-size: 0.7rem;
    color: #ced4da;
}

.gantt-task-name[data-outline-level="5"]::before {
    content: '│ │ │ ├─';
    position: absolute;
    left: 10px;
    color: #dee2e6;
    font-weight: normal;
}

/* 汇总任务名称特殊样式 */
.gantt-task-name.summary-task {
    background: linear-gradient(to right, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    border-left: 3px solid #667eea;
    font-weight: 600;
}

.gantt-task-name.summary-task:hover {
    background: linear-gradient(to right, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
    border-left-width: 4px;
}

/* 里程碑任务名称特殊样式 */
.gantt-task-name.milestone-task {
    background: linear-gradient(to right, rgba(255, 193, 7, 0.1) 0%, transparent 70%);
    border-left: 3px solid #ffc107;
    font-weight: 600;
}

.gantt-task-name.milestone-task:hover {
    background: linear-gradient(to right, rgba(255, 193, 7, 0.15) 0%, transparent 70%);
    border-left-width: 4px;
}

/* WBS 徽章 */
.gantt-task-name .wbs-badge {
    display: inline-block;
    padding: 2px 6px;
    background: rgba(102, 126, 234, 0.15);
    color: #667eea;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-right: 4px;
    font-family: 'Courier New', monospace;
}

.gantt-task-name.milestone-task .wbs-badge {
    background: rgba(255, 193, 7, 0.2);
    color: #ff9800;
}

.gantt-task-name.summary-task .wbs-badge {
    background: rgba(102, 126, 234, 0.25);
    color: #5568d3;
}

/* 任务名称内容 */
.task-name-content {
    display: inline-block;
    transition: all 0.2s ease;
}

.gantt-task-name:hover .task-name-content {
    transform: translateX(2px);
}

/* 折叠/展开按钮 */
.task-collapse-btn {
    display: inline-block;
    width: 18px;
    height: 18px;
    line-height: 16px;
    text-align: center;
    margin-right: 6px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.7rem;
    transition: all 0.2s ease;
    vertical-align: middle;
    font-weight: bold;
}

.task-collapse-btn:hover {
    background: rgba(102, 126, 234, 0.25);
    transform: scale(1.15);
}

.task-collapse-btn:active {
    transform: scale(0.95);
}

/* ======================
   右侧时间轴区域
   ====================== */
.gantt-timeline-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.gantt-timeline {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* 时间轴表头包装器 */
.gantt-timeline-header-wrapper {
    position: relative;
    height: var(--header-height);
    flex-shrink: 0;
    background: var(--gray-200);
    border-bottom: 2px solid var(--gray-300);
}

.gantt-timeline-header {
    display: flex;
    height: 100%;
    overflow: hidden;
    cursor: pointer;
    transition: background 0.2s ease;
}

.gantt-timeline-header:hover {
    background: rgba(102, 126, 234, 0.05);
}

/* 悬停提示 */
.gantt-timeline-header-wrapper::after {
    content: '悬停切换视图 ↓';
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.7rem;
    color: var(--gray-400);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

.gantt-timeline-header-wrapper:hover::after {
    opacity: 1;
}

/* 行容器 */
.gantt-rows-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: auto;
    position: relative;
    scroll-behavior: smooth;
    min-height: 0;
}

.gantt-rows {
    position: relative;
    min-width: 100%;
}

.gantt-row {
    display: flex;
    border-bottom: 1px solid var(--gray-200);
    height: var(--row-height);
    position: relative;
}

/* 汇总任务行样式 */
.gantt-row-summary {
    background: linear-gradient(to right, rgba(102, 126, 234, 0.03) 0%, transparent 100%);
    border-bottom: 2px solid rgba(102, 126, 234, 0.2);
}

/* ======================
   日期单元格
   ====================== */
.gantt-date-cell {
    width: var(--default-cell-width);
    min-width: var(--default-cell-width);
    padding: 6px 3px;
    text-align: center;
    border-right: 1px solid var(--gray-300);
    font-size: 0.7rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.gantt-date-day {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1px;
}

.gantt-date-weekday {
    font-size: 0.65rem;
    color: var(--gray-500);
}

/* 周视图样式 */
.gantt-date-week {
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 2px;
    color: var(--gray-700);
}

.gantt-date-range {
    font-size: 0.7rem;
    color: var(--gray-500);
}

/* 月视图样式 */
.gantt-date-year {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-bottom: 2px;
}

.gantt-date-month {
    font-weight: 600;
    font-size: 1rem;
    color: var(--gray-700);
}

/* 特殊日期样式 */
.gantt-date-cell.weekend {
    background: var(--gray-100);
}

.gantt-date-cell.today {
    background: #fff3cd;
    border-left: 2px solid var(--warning-color);
    border-right: 2px solid var(--warning-color);
}

/* 不同刻度下的单元格样式 */
.gantt-date-cell[data-scale="week"],
.gantt-cell[data-scale="week"] {
    border-right: 2px solid var(--gray-400);
}

.gantt-date-cell[data-scale="month"],
.gantt-cell[data-scale="month"] {
    border-right: 3px solid var(--gray-500);
}

.gantt-date-cell[data-scale="week"].today,
.gantt-date-cell[data-scale="month"].today {
    background: linear-gradient(135deg, #fff3cd 0%, #fffbeb 100%);
    border-left: 3px solid var(--warning-color);
    border-right: 3px solid var(--warning-color);
}

/* 单元格 */
.gantt-cell {
    width: var(--default-cell-width);
    min-width: var(--default-cell-width);
    border-right: 1px solid #f0f0f0;
    position: relative;
}

.gantt-cell.weekend {
    background: var(--gray-50);
}

.gantt-cell.today {
    background: #fffbeb;
}

/* 优化容器交互体验 */
.gantt-rows-container {
    flex: 1;
    overflow: auto; /* 保持滚动条作为辅助 */
    position: relative;
    scroll-behavior: auto; /* 禁用平滑滚动，由 JS 控制 */
    min-height: 0;
    cursor: grab; /* 默认显示抓手 */
    user-select: none; /* 拖拽时防止选中文本 */
}

.gantt-rows-container:active {
    cursor: grabbing; /* 按下时显示紧握 */
}

/* 任务条和交互元素保持自己的光标 */
.gantt-bar, .gantt-milestone, .gantt-bar-handle {
    cursor: pointer; /* 或者 move/ew-resize */
}

/* ======================
   响应式
   ====================== */
@media (max-width: 768px) {
    .gantt-sidebar {
        min-width: 80px;
        max-width: 250px;
    }

    .sidebar-resize-handle {
        width: 12px;
        right: -6px;
    }

    .gantt-task-name {
        font-size: 0.75rem;
        padding: 8px 6px;
    }
    
    .gantt-task-name[data-outline-level="2"] {
        padding-left: 20px;
    }
    
    .gantt-task-name[data-outline-level="3"] {
        padding-left: 36px;
    }
    
    .gantt-task-name[data-outline-level="4"] {
        padding-left: 52px;
    }
    
    .gantt-task-name[data-outline-level="2"]::before {
        left: 6px;
        font-size: 0.7rem;
    }
    
    .gantt-task-name[data-outline-level="3"]::before,
    .gantt-task-name[data-outline-level="4"]::before {
        left: 6px;
        font-size: 0.65rem;
    }
    
    .wbs-badge {
        font-size: 0.65rem;
        padding: 1px 4px;
    }
    
    .task-collapse-btn {
        width: 16px;
        height: 16px;
        font-size: 0.65rem;
    }

    .gantt-date-cell {
        font-size: 0.65rem;
        padding: 4px 2px;
    }

    .gantt-date-day {
        font-size: 0.8rem;
    }

    .gantt-date-weekday {
        font-size: 0.6rem;
    }
}

/* ======================
   打印样式
   ====================== */
@media print {
    .gantt-wrapper {
        max-height: none;
        height: auto;
    }

    .sidebar-resize-handle {
        display: none !important;
    }

    .gantt-container {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }

    .gantt-timeline-header-wrapper::after {
        display: none !important;
    }

    .gantt-rows-container {
        overflow: visible;
    }
    
    .task-collapse-btn {
        display: none !important;
    }
    
    .gantt-task-name[data-outline-level="2"]::before,
    .gantt-task-name[data-outline-level="3"]::before,
    .gantt-task-name[data-outline-level="4"]::before,
    .gantt-task-name[data-outline-level="5"]::before {
        color: #999;
    }
    
    .gantt-task-name.summary-task,
    .gantt-task-name.milestone-task {
        background: transparent;
        border-left: 2px solid #333;
    }

    /* ⭐ 新增：任务栏表头控制按钮 */
    .gantt-sidebar-header {
        /* 原有样式基础上增加相对定位 */
        position: relative;
        justify-content: space-between !important; /* 确保内容两端对齐 */
    }

    .header-controls {
        display: flex;
        gap: 8px;
        opacity: 0; /* 默认隐藏 */
        transition: opacity 0.2s ease;
        margin-left: auto; /* 推到右侧 */
    }

    .gantt-sidebar-header:hover .header-controls {
        opacity: 1; /* 悬停显示 */
    }

    .header-btn {
        width: 20px;
        height: 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 4px;
        cursor: pointer;
        font-size: 0.75rem;
        color: var(--gray-600);
        transition: all 0.2s ease;
    }

    .header-btn:hover {
        background: white;
        color: var(--primary-color);
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        transform: scale(1.1);
    }
}