/**
 * ASTConditionRenderer — 嵌套逻辑树样式 (Phase 5)
 *
 * 设计规范：
 * - 使用 CSS 变量与主项目一致
 * - 树形结构用左边框 + 嵌套缩进表达层级
 * - 操作符用颜色编码区分 AND(蓝)/OR(橙)/NOT(红)/AT_LEAST(紫)
 * - 叶子节点卡片化，可内联编辑
 *
 * 版本: v1.0 | 日期: 2026-04-09
 */

/* =============================================================================
   容器 & 空状态
   ============================================================================= */

.ast-tree-container {
    font-family: inherit;
    font-size: 14px;
}

.ast-tree-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.ast-tree-mode-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: linear-gradient(135deg, #e0e7ff, #ede9fe);
    color: #4338ca;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.ast-tree-action-btn {
    padding: 3px 10px;
    border: 1.5px dashed var(--primary);
    border-radius: 16px;
    background: transparent;
    color: var(--primary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}
.ast-tree-action-btn:hover {
    background: var(--primary-light);
}

/* ---- 空状态 ---- */
.ast-empty {
    text-align: center;
    padding: 24px 12px;
    color: var(--gray-400);
    border: 2px dashed var(--gray-200);
    border-radius: var(--radius);
    background: var(--gray-50);
}
.ast-empty-icon {
    font-size: 28px;
    margin-bottom: 8px;
}
.ast-buy-empty .ast-empty-icon { opacity: 0.7; }
.ast-sell-empty .ast-empty-icon { filter: grayscale(30%); }

.ast-quick-add-btn {
    display: inline-block;
    margin-top: 10px;
    padding: 6px 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}
.ast-quick-add-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59,130,246,0.3);
}

/* =============================================================================
   扁平兼容模式（旧版单信号）
   ============================================================================= */

.ast-flat-compat {
    position: relative;
}

.ast-flat-badge {
    position: absolute;
    top: -8px;
    right: 8px;
    padding: 1px 8px;
    background: var(--gray-200);
    color: var(--gray-500);
    border-radius: 10px;
    font-size: 10px;
    z-index: 1;
}

.ast-upgrade-btn {
    margin-top: 8px;
    width: 100%;
    padding: 6px 12px;
    border: 1.5px solid var(--warning);
    border-radius: 8px;
    background: linear-gradient(to bottom, #fffbeb, #fef3c7);
    color: #b45309;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}
.ast-upgrade-btn:hover {
    background: linear-gradient(to bottom, #fef3c7, #fde68a);
    box-shadow: 0 2px 8px rgba(245,158,11,0.15);
}

/* =============================================================================
   树节点 — 通用
   ============================================================================= */

.ast-node {
    margin: 0;
}

/* =============================================================================
   LogicGroup 分支节点（核心视觉！）
   ============================================================================= */

.ast-logic-group {
    margin-bottom: 4px;
    border-left: 3px solid var(--op-color, #3b82f6);
    border-radius: 0 8px 8px 8px;
    background: rgba(59,130,246,0.03);
    overflow: hidden;
    transition: border-color 0.2s;
}

/* 不同操作符的颜色主题 */
.ast-logic-group[data-style*="or"],
.ast-logic-group:has(.ast-op-select[value="or"]) {
    --op-color: #f59e0b;
    border-color: #f59e0b;
    background: rgba(245,158,11,0.03);
}
.ast-logic-group:has(.ast-op-select[value="not"]) {
    --op-color: #ef4444;
    border-color: #ef4444;
    background: rgba(239,68,68,0.03);
}
.ast-logic-group:has(.ast-op-select[value="at_least"]) {
    --op-color: #8b5cf6;
    border-color: #8b5cf6;
    background: rgba(139,92,246,0.03);
}

/* ---- Group Header（可点击折叠）---- */
.ast-group-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: white;
    border-bottom: 1px solid var(--gray-100);
    cursor: pointer;
    user-select: none;
    flex-wrap: wrap;
    min-height: 40px;
}
.ast-group-header:hover {
    background: var(--gray-50);
}

/* 折叠按钮 */
.ast-collapse-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: none;
    background: var(--gray-100);
    border-radius: 50%;
    cursor: pointer;
    font-size: 11px;
    color: var(--gray-500);
    transition: all 0.2s;
    flex-shrink: 0;
}
.ast-collapse-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}
.collapse-icon {
    font-size: 9px;
    line-height: 1;
}

/* 操作符选择器 */
.ast-op-info {
    display: flex;
    align-items: center;
    gap: 6px;
}

.ast-op-select {
    padding: 3px 8px;
    border: 1.5px solid var(--op-color, #3b82f6);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--op-color, #3b82f6);
    background: white;
    cursor: pointer;
    outline: none;
    min-width: 110px;
}
.ast-op-select:focus {
    box-shadow: 0 0 0 2px rgba(59,130,246,0.15);
}

/* AT_LEAST 控件 */
.at-least-control {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--gray-500);
    padding: 2px 6px;
    background: rgba(139,92,246,0.06);
    border-radius: 4px;
}
.at-least-input {
    width: 36px;
    padding: 2px 4px;
    border: 1px solid #a78bfa;
    border-radius: 4px;
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    color: #7c3aed;
    outline: none;
}
.at-least-input:focus {
    box-shadow: 0 0 0 2px rgba(139,92,246,0.15);
}

/* 组标签 */
.ast-group-label {
    padding: 2px 8px;
    background: var(--gray-100);
    border-radius: 4px;
    font-size: 11px;
    color: var(--gray-600);
    font-style: italic;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 统计信息 */
.ast-group-stats {
    margin-left: auto;
}
.ast-child-count {
    font-size: 11px;
    color: var(--gray-400);
    padding: 2px 8px;
    background: var(--gray-50);
    border-radius: 10px;
}

/* Group 操作按钮组 */
.ast-group-actions {
    display: flex;
    gap: 2px;
    margin-left: 4px;
}

/* 子节点容器 */
.ast-children {
    padding: 6px 0 6px 18px;
    /* 连接线效果：左侧竖线 */
    position: relative;
}
.ast-children::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 8px;
    width: 1.5px;
    background: repeating-linear-gradient(
        to bottom,
        var(--gray-200) 0,
        var(--gray-200) 6px,
        transparent 6px,
        transparent 10px
    );
}

.ast-child-wrapper {
    position: relative;
    margin: 4px 0;
}
/* 子节点水平连接线 */
.ast-child-wrapper::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 20px;
    width: 8px;
    height: 1.5px;
    background: var(--gray-200);
}

.ast-no-children {
    text-align: center;
    padding: 12px;
    color: var(--gray-300);
    font-size: 12px;
    font-style: italic;
}

/* =============================================================================
   SignalNode 叶子节点（信号卡片）
   ============================================================================= */

.ast-signal-node {
    margin: 4px 0;
}

.ast-signal-card {
    display: flex;
    align-items: stretch;
    gap: 8px;
    padding: 10px 12px;
    background: white;
    border: 1.5px solid var(--gray-150, #e5e7eb);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    transition: all 0.2s;
    animation: astFadeIn 0.25s ease-out;
}
@keyframes astFadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.ast-signal-card:hover {
    border-color: var(--gray-300);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.ast-signal-main {
    flex: 1;
    min-width: 0;
}

/* 字段行 */
.ast-signal-fields {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.ast-field-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}
.ast-field-group > label {
    font-size: 10px;
    color: var(--gray-400);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ast-select {
    padding: 5px 8px;
    border: 1.5px solid var(--gray-250, #e2e8f0);
    border-radius: 6px;
    font-size: 13px;
    color: var(--gray-700);
    background: white;
    cursor: pointer;
    outline: none;
    min-width: 120px;
    transition: border-color 0.2s;
}
.ast-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59,130,246,0.1);
}

.ast-sig-indicator {
    min-width: 130px;
    font-weight: 600;
}

.ast-sig-operator {
    min-width: 130px;
}

/* 值输入行 */
.ast-value-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
}
.ast-val-label {
    font-size: 10px;
    color: var(--gray-400);
    font-weight: 500;
}
.ast-value-input {
    width: 80px;
    padding: 4px 8px;
    border: 1.5px solid var(--gray-250, #e2e8f0);
    border-radius: 6px;
    font-size: 13px;
    outline: none;
}
.ast-value-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59,130,246,0.1);
}

/* 参数芯片 */
.ast-signal-params {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 6px;
}

.ast-param-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 6px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    font-size: 11px;
}
.ast-param-label {
    color: var(--gray-400);
    font-size: 10px;
}
.ast-param-input {
    width: 40px;
    padding: 1px 3px;
    border: 1px solid var(--gray-250);
    border-radius: 3px;
    font-size: 11px;
    text-align: center;
    outline: none;
    color: var(--gray-700);
    font-weight: 500;
}
.ast-param-input:focus {
    border-color: var(--primary);
}

/* 中文描述 */
.ast-signal-desc {
    margin-top: 6px;
    font-size: 12px;
    color: var(--gray-500);
    padding: 3px 8px;
    background: var(--gray-50);
    border-radius: 4px;
    line-height: 1.4;
}

/* ---- 右侧操作区 ---- */
.ast-signal-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
    padding: 4px 0;
}

/* 来源标签 */
.ast-source-tag {
    padding: 1px 6px;
    border-radius: 8px;
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.ast-source-tag.ai {
    background: #dbeafe;
    color: #2563eb;
}
.ast-source-tag.manual {
    background: #dcfce7;
    color: #16a34a;
}
.ast-source-tag.skill {
    background: #fef3c7;
    color: #d97706;
}

/* 按钮图标 */
.ast-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: 1px solid var(--gray-200);
    border-radius: 50%;
    background: white;
    cursor: pointer;
    font-size: 11px;
    color: var(--gray-400);
    transition: all 0.15s;
}
.ast-btn-icon:hover {
    border-color: var(--danger);
    color: var(--danger);
    background: #fef2f2;
}
.ast-btn-delete:hover {
    border-color: var(--danger);
    color: var(--danger);
    background: #fee2e2;
}

.ast-btn-add {
    color: var(--success) !important;
    border-color: var(--success) !important;
    font-weight: bold !important;
}
.ast-btn-add:hover {
    background: #ecfdf5 !important;
}

.ast-btn-add-group {
    color: var(--primary) !important;
    border-color: var(--primary) !important;
}
.ast-btn-add-group:hover {
    background: #eff6ff !important;
}

.ast-btn-danger:disabled {
    opacity: 0.3 !important;
    cursor: not-allowed !important;
}

/* =============================================================================
   错误节点
   ============================================================================= */

.ast-error-node {
    padding: 8px 12px;
    background: #fee2e2;
    color: #dc2626;
    border-radius: 6px;
    font-size: 12px;
    border: 1px solid #fecaca;
}

/* =============================================================================
   深度缩进（嵌套层级视觉效果）
   ============================================================================= */

.ast-logic-group[style*="--depth:1"] {
    margin-left: 4px;
}
.ast-logic-group[style*="--depth:2"] {
    margin-left: 10px;
    opacity: 0.98;
}
.ast-logic-group[style*="--depth:3"] {
    margin-left: 16px;
    opacity: 0.96;
}

/* =============================================================================
   响应式
   ============================================================================= */

@media (max-width: 768px) {
    .ast-group-header {
        flex-wrap: wrap;
        padding: 6px 8px;
    }

    .ast-signal-card {
        flex-direction: column;
        gap: 6px;
    }

    .ast-signal-actions {
        flex-direction: row;
        justify-content: flex-end;
    }

    .ast-signal-fields {
        flex-direction: column;
    }

    .ast-select {
        min-width: 100%;
    }

    .ast-children {
        padding-left: 12px;
    }
}

/* =============================================================================
   暗色模式适配
   ============================================================================= */

.dark-theme .ast-logic-group,
[data-theme="dark"] .ast-logic-group {
    background: rgba(255,255,255,0.02);
    border-color: var(--op-color, #60a5fa);
}

.dark-theme .ast-signal-card,
[data-theme="dark"] .ast-signal-card {
    background: rgba(255,255,255,0.04);
    border-color: rgba(255,255,255,0.08);
}

.dark-theme .ast-group-header,
[data-theme="dark"] .ast-group-header {
    background: rgba(255,255,255,0.03);
    border-color: rgba(255,255,255,0.06);
}

.dark-theme .ast-signal-desc,
[data-theme="dark"] .ast-signal-desc {
    background: rgba(255,255,255,0.05);
    color: var(--gray-400);
}

.dark-theme .ast-empty,
[data-theme="dark"] .ast-empty {
    background: rgba(255,255,255,0.03);
    border-color: rgba(255,255,255,0.08);
    color: var(--gray-500);
}

/* =============================================================================
   动画
   ============================================================================= */

@keyframes astSlideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        max-height: 500px;
        transform: translateY(0);
    }
}

.ast-children:not([style*="display:none"]) {
    animation: astSlideDown 0.25s ease-out;
}