/* ═══════════════════════════════════════════
   Flow Designer — 拖拽式审批流设计器
   ═══════════════════════════════════════════ */

.fd-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: var(--bg);
  display: none; flex-direction: column;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.fd-overlay.active { display: flex; }

/* ── 顶部工具栏 ── */
.fd-topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: var(--card);
  border-bottom: 1px solid var(--border); flex-shrink: 0;
  min-height: 56px;
}
.fd-topbar-left { display: flex; align-items: center; gap: 16px; }
.fd-back {
  font-size: 13px; color: var(--accent); cursor: pointer;
  padding: 4px 8px; border-radius: 4px; transition: background .15s;
}
.fd-back:hover { background: rgba(59,130,246,0.08); }
.fd-flow-info { display: flex; align-items: center; gap: 12px; }
.fd-flow-name {
  font-size: 16px; font-weight: 600; color: var(--text);
  background: transparent; border: 1px solid transparent; outline: none;
  padding: 4px 8px; border-radius: 4px; width: 200px;
  transition: border .15s;
}
.fd-flow-name:focus { border-color: var(--accent); background: var(--bg); }
.fd-flow-desc {
  font-size: 12px; color: var(--muted); background: transparent;
  border: 1px solid transparent; outline: none;
  padding: 4px 8px; border-radius: 4px; width: 180px;
  transition: border .15s;
}
.fd-flow-desc:focus { border-color: var(--border); background: var(--bg); }
.fd-enabled { font-size: 12px; color: var(--muted); display: flex; align-items: center; gap: 4px; cursor: pointer; }
.fd-topbar-right { display: flex; align-items: center; gap: 12px; }
.fd-status { font-size: 12px; color: var(--muted); }

/* ── 主区域 ── */
.fd-main {
  display: flex; flex: 1; overflow: hidden;
}

/* ── 左侧面板（步骤类型） ── */
.fd-palette {
  width: 200px; flex-shrink: 0; background: var(--card);
  border-right: 1px solid var(--border); padding: 16px;
  display: flex; flex-direction: column; gap: 8px;
  overflow-y: auto;
}
.fd-palette-title {
  font-size: 12px; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px;
}
.fd-palette-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; cursor: grab; font-size: 13px; color: var(--text);
  transition: all .15s; user-select: none;
}
.fd-palette-item:hover { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(59,130,246,0.1); }
.fd-palette-item:active { cursor: grabbing; }
.fd-palette-icon { font-size: 16px; }

/* ── 中间画布 ── */
.fd-canvas {
  flex: 1; position: relative; overflow: auto;
  padding: 32px 40px; background:
    radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
}
.fd-canvas-inner {
  position: relative; min-height: 100%;
}

/* ── 步骤列表 ── */
.fd-steps {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; gap: 8px;
  max-width: 520px; margin: 0 auto;
}
.fd-parallel-group {
  display: flex; gap: 12px; align-items: stretch;
  background: rgba(59,130,246,0.04); border: 1px dashed var(--accent);
  border-radius: 12px; padding: 12px;
  position: relative;
}
.fd-parallel-group::before {
  content: '并行'; position: absolute; top: -10px; left: 12px;
  background: var(--accent); color: #fff;
  font-size: 10px; padding: 1px 8px; border-radius: 8px;
  letter-spacing: 0.5px;
}
.fd-parallel-group .fd-step { flex: 1; min-width: 0; }

/* ── 单个步骤卡片 ── */
.fd-step {
  background: var(--card); border: 2px solid var(--border);
  border-radius: 10px; padding: 14px 16px;
  display: flex; align-items: center; gap: 12px;
  transition: all .18s; cursor: default; position: relative;
  min-height: 56px;
}
.fd-step:hover { border-color: var(--accent); box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
.fd-step.selected { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }
.fd-step.dragging { opacity: 0.5; transform: scale(0.97); }
.fd-step.drag-over { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.2); }
.fd-step .step-number {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.fd-step .step-info { flex: 1; min-width: 0; }
.fd-step .step-name {
  font-size: 14px; font-weight: 600; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.fd-step .step-approver {
  font-size: 11px; color: var(--muted); margin-top: 2px;
  display: flex; align-items: center; gap: 4px;
}
.fd-step .step-approver .tag {
  display: inline-block; padding: 1px 6px; border-radius: 4px;
  font-size: 10px; font-weight: 600;
}
.fd-step .step-approver .tag-role { background: rgba(139,92,246,0.12); color: #8b5cf6; }
.fd-step .step-approver .tag-user { background: rgba(34,197,94,0.12); color: #22c55e; }
/* 拖拽手柄 */
.fd-step .step-grip {
  flex-shrink: 0; cursor: grab; color: var(--muted);
  font-size: 16px; padding: 0 4px; user-select: none;
  letter-spacing: 2px;
}
.fd-step .step-grip:active { cursor: grabbing; }
/* 操作按钮 */
.fd-step .step-actions {
  display: flex; gap: 4px; flex-shrink: 0; opacity: 0; transition: opacity .15s;
}
.fd-step:hover .step-actions { opacity: 1; }
.fd-step .step-btn {
  width: 28px; height: 28px; border-radius: 6px; border: none;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--muted); background: transparent;
  transition: all .15s;
}
.fd-step .step-btn:hover { background: var(--bg); }
.fd-step .step-btn.btn-del:hover { color: var(--red); background: rgba(239,68,68,0.1); }
.fd-step .step-btn.btn-parallel:hover { color: var(--accent); background: rgba(59,130,246,0.1); }

/* ── 插入指示器 ── */
.fd-drop-indicator {
  height: 4px; background: var(--accent); border-radius: 2px;
  transition: all .15s; opacity: 0;
}
.fd-drop-indicator.active { opacity: 1; height: 6px; }

/* ── 末尾放置区 ── */
.fd-drop-end {
  position: relative; z-index: 2;
  border: 2px dashed var(--border); border-radius: 12px;
  padding: 24px; text-align: center; color: var(--muted);
  font-size: 13px; transition: all .2s;
  max-width: 520px; margin: 8px auto 0;
  cursor: default;
}
.fd-drop-end.drag-hover {
  border-color: var(--accent); background: rgba(59,130,246,0.05); color: var(--accent);
}

/* ── 拖拽幽灵（跟随鼠标） ── */
.fd-ghost {
  position: fixed; pointer-events: none; z-index: 10010;
  padding: 10px 16px; background: var(--card); border: 2px solid var(--accent);
  border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  font-size: 13px; color: var(--text); display: flex; align-items: center; gap: 8px;
  opacity: 0.9; transform: rotate(1.5deg);
}

/* ── 右侧属性面板 ── */
.fd-properties {
  width: 300px; flex-shrink: 0; background: var(--card);
  border-left: 1px solid var(--border); padding: 20px;
  overflow-y: auto;
}
.fd-props-placeholder {
  text-align: center; padding: 40px 20px; color: var(--muted);
  font-size: 13px;
}
.fd-props-title {
  font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.fd-props-group {
  margin-bottom: 16px;
}
.fd-props-label {
  display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px;
  font-weight: 500;
}
.fd-props-input, .fd-props-select {
  width: 100%; padding: 8px 10px; font-size: 13px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); outline: none; font-family: inherit;
  transition: border .15s;
}
.fd-props-input:focus, .fd-props-select:focus { border-color: var(--accent); }
.fd-props-delete {
  width: 100%; padding: 8px; border: 1px solid var(--red); border-radius: 6px;
  background: transparent; color: var(--red); font-size: 13px; cursor: pointer;
  transition: all .15s; margin-top: 8px;
}
.fd-props-delete:hover { background: rgba(239,68,68,0.08); }

/* ── 步骤间连接器 ── */
.fd-step-connector {
  position: relative; z-index: 2; max-width: 520px; margin: 0 auto;
  display: flex; align-items: center; justify-content: center;
  height: 32px;
}
.fd-step-connector::after {
  content: '';
  position: absolute; left: 50%; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--accent), var(--accent) 60%, transparent);
  transform: translateX(-50%);
}
.fd-step-connector .arrow-down {
  position: relative; z-index: 1;
  width: 0; height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--accent);
  margin-top: 8px;
}

/* ── 空状态 ── */
.fd-empty-state {
  position: relative; z-index: 2; max-width: 520px; margin: 0 auto;
  text-align: center; padding: 48px 20px; color: var(--muted);
}
.fd-empty-state .fd-empty-icon { font-size: 48px; margin-bottom: 12px; }
.fd-empty-state .fd-empty-text { font-size: 14px; margin-bottom: 4px; }
.fd-empty-state .fd-empty-hint { font-size: 12px; opacity: 0.7; }

/* ── 并行操作区域 ── */
.fd-canvas-controls {
  position: absolute; top: 16px; right: 24px; z-index: 10;
  display: flex; gap: 8px;
}
.fd-canvas-controls button {
  padding: 6px 12px; font-size: 12px; border: 1px solid var(--border);
  border-radius: 6px; background: var(--card); color: var(--text);
  cursor: pointer; transition: all .15s;
}
.fd-canvas-controls button:hover { border-color: var(--accent); }

/* ── 用户多选组件 ── */
.fd-user-select-wrap {
  position: relative;
  width: 100%;
}
.fd-user-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  min-height: 36px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  cursor: text;
  align-items: center;
  transition: border-color .15s;
}
.fd-user-tags:focus-within { border-color: var(--accent); }
.fd-user-placeholder {
  font-size: 13px; color: var(--muted); pointer-events: none;
}
.fd-user-tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 7px; padding-right: 4px;
  background: var(--primary); color: #fff;
  border-radius: 4px; font-size: 12px; line-height: 1.6;
  white-space: nowrap; max-width: 160px; overflow: hidden;
}
.fd-user-tag .fd-user-tag-remove {
  cursor: pointer; opacity: 0.75; flex-shrink: 0;
  width: 14px; height: 14px; line-height: 14px; text-align: center;
  font-size: 10px; border-radius: 50%;
}
.fd-user-tag .fd-user-tag-remove:hover { opacity: 1; background: rgba(0,0,0,0.15); }

.fd-user-search {
  flex: 1; min-width: 80px;
  border: none; outline: none; background: transparent;
  font-size: 13px; color: var(--text); padding: 4px;
  font-family: inherit;
}

.fd-user-dropdown {
  position: absolute; top: calc(100% + 3px); left: 0; right: 0;
  max-height: 220px; overflow-y: auto;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 6px; box-shadow: 0 4px 16px rgba(0,0,0,.12);
  z-index: 100; animation: fdDropIn .12s ease-out;
}
@keyframes fdDropIn { from{opacity:0;transform:translateY(-4px)} to{opacity:1;transform:none} }

.fd-user-option {
  display: flex; align-items: center; gap: 8px; padding: 7px 10px;
  cursor: pointer; transition: background .1s; border-bottom: 1px solid rgba(0,0,0,.04);
}
.fd-user-option:last-child { border-bottom: none; }
.fd-user-option:hover { background: rgba(0,0,0,.03); }
.fd-user-option.selected { background: rgba(var(--rgb-primary), .08); }
.fd-user-option.selected:hover { background: rgba(var(--rgb-primary), .12); }
.fd-user-check {
  width: 18px; height: 18px; min-width: 18px;
  border: 1.5px solid var(--border); border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; color: #fff; transition: all .12s;
}
.fd-user-option.selected .fd-user-check {
  background: var(--primary); border-color: var(--primary);
}
.fd-user-opt-name {
  font-size: 13px; color: var(--text); font-weight: 500;
}
.fd-user-opt-username {
  margin-left: auto; font-size: 11px; color: var(--muted);
}
.fd-user-option-empty {
  padding: 20px; text-align: center; font-size: 13px; color: var(--muted);
}

/* ── 响应式：小屏隐藏属性面板 ── */
@media (max-width: 900px) {
  .fd-properties { display: none; }
  .fd-palette { width: 150px; }
}