/* ===== 画布编辑器样式 ===== */
body { overflow: hidden; }

.ws-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: 48px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
}

.ws-header-left { display: flex; align-items: center; gap: 16px; }
.ws-logo { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; }
.ws-project-name {
  font-size: 14px; font-weight: 500; padding: 4px 8px; border-radius: 4px;
  border: 1px solid transparent; min-width: 100px;
}
.ws-project-name:hover { border-color: var(--border-color); background: var(--bg-input); }

.ws-header-right { display: flex; gap: 8px; align-items: center; }
.ws-btn {
  padding: 6px 12px; border-radius: 6px; border: 1px solid var(--border-color);
  background: transparent; color: var(--text-primary); font-size: 12px;
  cursor: pointer; display: flex; align-items: center; gap: 4px; transition: var(--transition);
}
.ws-btn:hover { border-color: var(--primary); }
.ws-btn-ghost { border: 1px solid var(--border-color); }
.ws-btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none; color: #fff; padding: 8px 16px;
}
.ws-btn-primary:hover { opacity: 0.9; }

/* 左侧工具栏 */
.ws-toolbar {
  position: fixed; top: 56px; left: 16px;
  display: flex; flex-direction: column; gap: 4px;
  padding: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  z-index: 90;
  box-shadow: var(--shadow);
}

.ws-tool-btn {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: 1px solid transparent;
  color: var(--text-primary); border-radius: 8px;
  cursor: pointer; transition: var(--transition);
}
.ws-tool-btn:hover { background: var(--bg-input); border-color: var(--border-color); }
.ws-tool-btn:active { background: var(--primary); border-color: var(--primary); }

.ws-tool-sep { height: 1px; background: var(--border-color); margin: 4px 0; }

/* 画布区域 */
.ws-canvas-wrap {
  position: fixed;
  top: 48px; left: 0; right: 0; bottom: 0;
  overflow: hidden;
  background: var(--bg-dark);
}

.ws-canvas-viewport {
  position: absolute; top: 0; left: 0;
  width: 5000px; height: 5000px;
  background-image: radial-gradient(circle, var(--border-color) 1px, transparent 1px);
  background-size: 40px 40px;
  transform-origin: 0 0;
  cursor: grab;
}

.ws-canvas-viewport.grabbing { cursor: grabbing; }

.ws-connections {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 1;
}

#wsNodes { position: absolute; top: 0; left: 0; z-index: 2; }

/* 空状态 */
.ws-empty-hint {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center; z-index: 5;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.ws-empty-hint-badge {
  display: inline-flex; padding: 20px; border-radius: 50%;
  background: var(--bg-card); border: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.ws-empty-hint h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.ws-empty-hint p { font-size: 13px; color: var(--text-secondary); margin-bottom: 20px; }

.ws-empty-hint-pills { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.ws-pill-btn {
  padding: 8px 18px; border-radius: 20px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  color: var(--text-primary); font-size: 13px;
  cursor: pointer; transition: var(--transition);
}
.ws-pill-btn:hover { border-color: var(--primary); background: var(--bg-input); }

/* 节点样式 */
.ws-node {
  position: absolute;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
  cursor: move;
  z-index: 10;
  transition: box-shadow 0.2s, border-color 0.2s;
  user-select: none;
}

.ws-node:hover { border-color: var(--primary); box-shadow: 0 4px 20px rgba(99,102,241,0.2); }
.ws-node.selected { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary); }
.ws-node.generating { border-color: var(--warning); box-shadow: 0 0 0 2px var(--warning); }
.ws-node.error { border-color: var(--error); box-shadow: 0 0 0 2px var(--error); }

.ws-node-header {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 10px; border-bottom: 1px solid var(--border-color);
  font-size: 12px; font-weight: 500;
}

.ws-node-icon { font-size: 14px; }
.ws-node-title { flex: 1; }

.ws-node-port {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border-color); border: 2px solid var(--bg-card);
  cursor: crosshair; transition: 0.2s;
}
.ws-node-port:hover { background: var(--primary); transform: scale(1.3); }
.ws-node-port-in { position: absolute; left: -6px; top: 50%; transform: translateY(-50%); }
.ws-node-port-out { position: absolute; right: -6px; top: 50%; transform: translateY(-50%); }

.ws-node-body { padding: 8px 10px; font-size: 11px; color: var(--text-secondary); min-height: 30px; }
.ws-node-preview {
  width: 100%; min-height: 60px; display: flex; align-items: center; justify-content: center;
  padding: 8px; border-top: 1px solid var(--border-color);
  font-size: 11px; color: var(--text-secondary);
}
.ws-node-preview img, .ws-node-preview video {
  max-width: 100%; max-height: 120px; border-radius: 4px; object-fit: cover;
}

.ws-node-actions {
  display: flex; gap: 4px; padding: 4px 8px 8px;
  opacity: 0; transition: 0.2s;
}
.ws-node:hover .ws-node-actions { opacity: 1; }

.ws-node-action-btn {
  padding: 3px 8px; font-size: 10px;
  background: var(--bg-input); border: 1px solid var(--border-color);
  color: var(--text-secondary); border-radius: 4px;
  cursor: pointer;
}
.ws-node-action-btn:hover { color: var(--text-primary); border-color: var(--primary); }

.ws-loading-spinner {
  display: inline-block; width: 12px; height: 12px;
  border: 2px solid var(--border-color);
  border-top-color: var(--warning);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 画布控制 */
.ws-canvas-controls {
  position: fixed; bottom: 16px; right: 16px;
  display: flex; align-items: center; gap: 4px;
  padding: 6px 10px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 8px; z-index: 90;
}
.ws-canvas-controls button {
  width: 28px; height: 28px;
  background: transparent; border: none; color: var(--text-primary);
  border-radius: 4px; cursor: pointer; font-size: 14px;
}
.ws-canvas-controls button:hover { background: var(--bg-input); }
#wsZoomPercent { font-size: 12px; min-width: 42px; text-align: center; color: var(--text-secondary); }

/* 提示词面板 */
.ws-prompt-panel {
  position: fixed; bottom: 16px; left: 76px;
  width: 340px; max-height: 500px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 12px; z-index: 95;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.ws-prompt-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; border-bottom: 1px solid var(--border-color);
  font-weight: 600; font-size: 13px;
}
.ws-prompt-close {
  background: none; border: none; color: var(--text-secondary);
  font-size: 18px; cursor: pointer; padding: 0 4px;
}
.ws-prompt-close:hover { color: var(--text-primary); }

.ws-prompt-body { padding: 12px 14px; }
.ws-prompt-body textarea {
  width: 100%; padding: 10px; border-radius: 6px;
  background: var(--bg-input); border: 1px solid var(--border-color);
  color: var(--text-primary); font-size: 13px; resize: vertical;
  outline: none; min-height: 60px;
}
.ws-prompt-body textarea:focus { border-color: var(--primary); }

.ws-prompt-model-select { display: flex; align-items: center; gap: 8px; margin: 10px 0; }
.ws-prompt-model-select label { font-size: 12px; color: var(--text-secondary); }
.ws-prompt-model-select select {
  flex: 1; padding: 6px 8px; border-radius: 4px;
  background: var(--bg-input); border: 1px solid var(--border-color);
  color: var(--text-primary); font-size: 12px;
}

.ws-prompt-actions { display: flex; gap: 8px; margin-top: 10px; }
.ws-prompt-actions .ws-btn { flex: 1; justify-content: center; }

/* 响应式 */
@media (max-width: 768px) {
  .ws-toolbar { top: auto; bottom: 16px; left: 50%; transform: translateX(-50%); flex-direction: row; }
  .ws-prompt-panel { left: 16px; width: calc(100% - 32px); }
}