/* ============================================================================
   架构幕布 /mubu —— 幕布式「大纲 + 思维导图」双视图编辑器
   设计变量沿用后台浅色 VI（app.css :root），本文件只加布局与画布样式。
   ========================================================================== */

.mb-body {
  margin: 0;
  background: var(--bg, #f8fafc);
  color: var(--text, #1e293b);
  font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* 整页是个不滚动的 flex 列：给底部留出 Home 指示条高度，画布不会被压住 */
  padding-bottom: var(--sab);
}

/* ---------------------------------- 顶栏 ---------------------------------- */
.mb-top {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  padding-top: calc(10px + var(--sat));
  padding-left: calc(14px + var(--sal));
  padding-right: calc(14px + var(--sar));
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  flex-wrap: wrap;
}
.mb-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary, #2563eb);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 4px;
}
.mb-title small { font-weight: 500; color: #64748b; font-size: 12px; }
.mb-spacer { flex: 1 1 auto; }
.mb-btn {
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #1e293b;
  border-radius: 8px;
  padding: 6px 11px;
  font-size: 13px;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.mb-btn:hover:not(:disabled) { border-color: var(--primary, #2563eb); color: var(--primary, #2563eb); background: #eff6ff; }
.mb-btn:disabled { opacity: .45; cursor: not-allowed; }
.mb-btn.primary { background: var(--primary, #2563eb); border-color: var(--primary, #2563eb); color: #fff; }
.mb-btn.primary:hover:not(:disabled) { background: #1d4ed8; color: #fff; }
.mb-btn.danger { color: #dc2626; border-color: #fecaca; }
.mb-btn.danger:hover:not(:disabled) { background: #fef2f2; border-color: #dc2626; color: #dc2626; }
.mb-seg { display: inline-flex; border: 1px solid #cbd5e1; border-radius: 8px; overflow: hidden; }
.mb-seg button {
  border: 0; background: #fff; padding: 6px 12px; font-size: 13px; cursor: pointer; color: #475569;
}
.mb-seg button.on { background: var(--primary, #2563eb); color: #fff; }
.mb-stat { font-size: 12px; color: #64748b; }
.mb-dirty { color: #d97706; font-weight: 600; }

/* ---------------------------------- 主体 ---------------------------------- */
.mb-main { flex: 1 1 auto; display: flex; min-height: 0; }

/* 大纲 */
.mb-outline {
  flex: 0 0 40%;
  max-width: 620px;
  min-width: 280px;
  background: #fff;
  border-right: 1px solid #e2e8f0;
  overflow: auto;
  padding: 8px 6px 60px;
}
.mb-main.map-only .mb-outline { display: none; }
.mb-main.map-only .mb-canvas-wrap { flex: 1 1 100%; }

.mb-row {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 6px;
  border-radius: 7px;
  border: 1px solid transparent;
  cursor: default;
  position: relative;
}
.mb-row:hover { background: #f1f5f9; }
.mb-row.sel { background: #eff6ff; border-color: #bfdbfe; }
.mb-row.drop-into { border-color: var(--primary, #2563eb); background: #dbeafe; }
.mb-row.drop-before { box-shadow: inset 0 2px 0 var(--primary, #2563eb); }
.mb-caret {
  width: 16px; flex: 0 0 16px; text-align: center; cursor: pointer; color: #94a3b8; font-size: 10px; -webkit-user-select: none; user-select: none;
}
.mb-ico { flex: 0 0 auto; font-size: 14px; }
.mb-name {
  flex: 1 1 auto;
  font-size: 13.5px;
  line-height: 1.5;
  outline: none;
  min-width: 40px;
  padding: 1px 3px;
  border-radius: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mb-name:focus { background: #fff; box-shadow: 0 0 0 2px #bfdbfe; }
.mb-code {
  font-size: 11px;
  color: #94a3b8;
  font-family: ui-monospace, Consolas, monospace;
  white-space: nowrap;
}
.mb-tag {
  font-size: 10.5px; padding: 1px 6px; border-radius: 99px; background: #e2e8f0; color: #475569; white-space: nowrap;
}
.mb-relchip {
  font-size: 10.5px; padding: 1px 6px; border-radius: 99px; background: #fef3c7; color: #92400e; white-space: nowrap;
}
.mb-rowacts { display: none; gap: 3px; margin-left: auto; }
.mb-row:hover .mb-rowacts, .mb-row.sel .mb-rowacts { display: flex; }
.mb-mini {
  border: 1px solid #cbd5e1; background: #fff; border-radius: 6px; width: 22px; height: 22px;
  font-size: 12px; line-height: 1; cursor: pointer; color: #475569; display: inline-flex; align-items: center; justify-content: center;
}
.mb-mini:hover { border-color: var(--primary, #2563eb); color: var(--primary, #2563eb); }
.mb-gaps { padding: 10px 12px 30px; }
.mb-gap {
  display: flex; gap: 8px; align-items: flex-start; padding: 8px 10px; border-radius: 8px;
  background: #fff; border: 1px solid #e2e8f0; margin-bottom: 7px; font-size: 13px;
}
.mb-gap .lv { flex: 0 0 auto; font-size: 11px; padding: 1px 7px; border-radius: 99px; font-weight: 600; }
.mb-gap .lv.高 { background: #fee2e2; color: #b91c1c; }
.mb-gap .lv.中 { background: #fef3c7; color: #92400e; }
.mb-gap .lv.低 { background: #dcfce7; color: #166534; }
.mb-gap .g-t { font-weight: 600; }
.mb-gap .g-w { color: #64748b; font-size: 12px; margin-top: 2px; }

/* 画布 */
.mb-canvas-wrap { flex: 1 1 auto; min-width: 0; position: relative; background: #fbfcfe; overflow: hidden; }
.mb-canvas-wrap svg { display: block; width: 100%; height: 100%; cursor: grab; }
.mb-canvas-wrap svg.grabbing { cursor: grabbing; }
.mb-node-box { cursor: pointer; }
.mb-node-box rect { transition: filter .12s; }
.mb-node-box:hover rect { filter: brightness(.96); }
.mb-node-box.sel rect { stroke-width: 2.5; }
.mb-node-box.dragging { opacity: .5; }
.mb-hint {
  position: absolute; left: 14px; bottom: 12px; font-size: 12px; color: #94a3b8;
  background: rgba(255,255,255,.92); border: 1px solid #e2e8f0; border-radius: 8px; padding: 6px 10px; pointer-events: none;
}
.mb-zoom {
  position: absolute; right: 14px; bottom: 12px; display: flex; gap: 4px;
  background: rgba(255,255,255,.94); border: 1px solid #e2e8f0; border-radius: 10px; padding: 4px;
}
.mb-zoom button {
  border: 0; background: transparent; border-radius: 7px; min-width: 34px; height: 28px;
  font-size: 13px; cursor: pointer; color: #334155;
}
.mb-zoom button:hover { background: #eff6ff; color: var(--primary, #2563eb); }
.mb-zoom button.small { font-size: 11px; padding: 0 8px; }
.mb-zoom .k { font-size: 11px; color: #94a3b8; align-self: center; padding: 0 6px; min-width: 40px; text-align: center; }
.mb-legend {
  position: absolute; right: 14px; top: 12px; background: rgba(255,255,255,.94); border: 1px solid #e2e8f0;
  border-radius: 10px; padding: 8px 10px; font-size: 12px; color: #475569; max-width: 240px;
}
.mb-legend b { display: block; margin-bottom: 4px; color: #1e293b; }
.mb-legend span { display: inline-flex; align-items: center; gap: 4px; margin-right: 10px; }

/* ---------------------------------- 弹层 ---------------------------------- */
.mb-modal-mask {
  position: fixed; inset: 0; background: rgba(15,23,42,.45); display: none; align-items: center; justify-content: center; z-index: 80;
}
.mb-modal-mask.on { display: flex; }
.mb-modal {
  background: #fff; border-radius: 14px; width: min(560px, 92vw); max-height: 84vh; overflow: auto; padding: 18px 20px;
  box-shadow: 0 18px 50px rgba(2,6,23,.28);
}
.mb-modal h3 { margin: 0 0 12px; font-size: 16px; }
.mb-field { margin-bottom: 12px; }
.mb-field label { display: block; font-size: 12.5px; color: #64748b; margin-bottom: 4px; }
.mb-field input, .mb-field select, .mb-field textarea {
  width: 100%; box-sizing: border-box; border: 1px solid #cbd5e1; border-radius: 8px; padding: 8px 10px;
  font-size: 13.5px; font-family: inherit; color: #1e293b; background: #fff;
}
.mb-field textarea { min-height: 64px; resize: vertical; }
.mb-modal-acts { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.mb-list-item { display: flex; align-items: center; gap: 8px; padding: 7px 8px; border: 1px solid #e2e8f0; border-radius: 8px; margin-bottom: 6px; font-size: 13px; }
.mb-toast {
  position: fixed; left: 50%; bottom: 36px;
  bottom: calc(36px + var(--sab)); transform: translateX(-50%);
  background: #1e293b; color: #fff; padding: 10px 18px; border-radius: 10px; font-size: 13.5px;
  opacity: 0; transition: opacity .2s, transform .2s; pointer-events: none; z-index: 90;
}
.mb-toast.on { opacity: .96; transform: translateX(-50%) translateY(-4px); }
.mb-empty { padding: 40px; text-align: center; color: #94a3b8; font-size: 14px; }

/* 窄屏：默认只看大纲 */
@media (max-width: 860px) {
  .mb-outline { flex: 1 1 100%; max-width: none; border-right: 0; }
  .mb-canvas-wrap { display: none; }
  .mb-main.map-only .mb-outline { display: none; }
  .mb-main.map-only .mb-canvas-wrap { display: block; }
}