body {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
    padding: 1rem 0;
}

.flowchart-tool {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    padding: 1.5rem;
    margin-bottom: 2rem;
    height: calc(100vh - 2rem);
    display: flex;
    flex-direction: column;
}

.tool-header {
    margin-bottom: 1rem;
}

.flowchart-tool h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.tool-content {
    display: flex;
    gap: 1.5rem;
    flex: 1;
    min-height: 0;
}

/* 面板标题样式 */
.left-panel .form-group > label,
.right-panel label {
    font-size: 1rem;
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.75rem;
    display: block;
}

/* 右侧面板头部样式 */
.right-panel .d-flex {
    background: white;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    margin-bottom: 1rem;
}

/* 左侧面板 */
.left-panel {
    width: 40%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.steps-container {
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 1rem;
    background: #f8f9fa;
    flex: 1;
    overflow-y: auto;
    max-height: calc(100vh - 12rem);
}

/* 添加步骤按钮固定在底部 */
#addStepBtn {
    position: sticky;
    bottom: 0;
    background: white;
    padding: 0.5rem;
    margin: 0 -1rem -1rem -1rem;
    border-top: 1px solid #dee2e6;
    border-radius: 0 0 8px 8px;
    width: calc(100% + 2rem);
    color: #4a90e2;
    transition: all 0.2s;
}

#addStepBtn:hover {
    background: #4a90e2;
    color: white;
    border-color: #4a90e2;
}

.step-item {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 6px;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    transition: all 0.2s;
}

.step-item:hover {
    border-color: #4a90e2;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.step-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.step-number {
    font-weight: 500;
    color: #495057;
}

.step-controls {
    display: flex;
    gap: 0.25rem;
}

.step-controls .btn-link {
    color: #6c757d;
    padding: 0.25rem;
}

.step-controls .btn-link:hover {
    color: #4a90e2;
}

.step-content {
    margin-bottom: 0.5rem;
}

/* 右侧面板 */
.right-panel {
    width: 60%;
    display: flex;
    flex-direction: column;
}

/* 预览区域样式 */
.preview-container {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid #e9ecef;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

/* Mermaid图表样式调整 */
.preview-container svg {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* 工具提示 */
.tooltip {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.9rem;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tooltip.show {
    opacity: 1;
}

/* 分支样式 */
.branches-container {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
    border-left: 2px dashed #dee2e6;
}

.branch-item {
    margin-bottom: 0.5rem;
}

.branch-item:last-child {
    margin-bottom: 0;
}

.branch-item .input-group {
    gap: 0.5rem;
}

.branch-condition {
    flex: 2;
}

.branch-goto {
    flex: 1;
}