:root {
  --bg: #f8f1f4;
  --panel: #fff8fb;
  --panel-soft: #f5e8ef;
  --line: #d2b5c1;
  --text: #4e3844;
  --text-dim: #806673;
  --shadow: 0 12px 32px rgba(129, 78, 103, 0.14);
  --pending: #b9aab2;
  --in-progress: #d58ca8;
  --completed: #90bca2;
  --bug: #c98289;
  --link: #cfb8c3;
  --highlight: #f5dde8;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at 12% -10%, #fff6fb 0, transparent 36%),
    radial-gradient(circle at 80% 0, #f8eaf1 0, transparent 32%),
    var(--bg);
  color: var(--text);
  font-family: "LXGW WenKai", "Noto Sans SC", "Avenir Next", sans-serif;
}

.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 18px;
  padding: 18px;
}

.top-bar {
  display: grid;
  grid-template-columns: 1.4fr 1fr auto;
  gap: 18px;
  align-items: end;
  background: linear-gradient(140deg, #fff8fb 0%, #f8ebf1 100%);
  border: 1px solid #edd8e3;
  border-radius: 20px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.brand-block h1 {
  margin: 0 0 6px;
  font-size: clamp(1.35rem, 2vw, 1.95rem);
  letter-spacing: 0.02em;
}

.brand-block p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.root-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.root-form label {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.inline-group {
  display: flex;
  gap: 10px;
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  border: 1px solid #d9bfcb;
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  padding: 10px 12px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid #f2cadb;
  outline-offset: 1px;
}

.btn {
  border: 1px solid #d4b1c0;
  border-radius: 12px;
  padding: 9px 12px;
  background: #fff5fa;
  color: var(--text);
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: #ffeef6;
  border-color: #c895ab;
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, #df9db8 0%, #d48ca9 100%);
  color: #fff;
  border-color: #c8809d;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #d78ea8 0%, #c87895 100%);
}

.btn-danger {
  background: #f8eaeb;
  border-color: #d49ea6;
  color: #8f4c56;
}

.toolbar-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 1fr));
  gap: 8px;
}

.board-layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-card {
  background: var(--panel);
  border: 1px solid #ebd3df;
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 10px 22px rgba(126, 79, 104, 0.08);
}

.panel-card h2 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.legend-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.legend-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.legend-dot.pending {
  background: var(--pending);
}

.legend-dot.in-progress {
  background: var(--in-progress);
}

.legend-dot.completed {
  background: var(--completed);
}

.legend-dot.bug {
  background: var(--bug);
}

.stats-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.stats-list div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--panel-soft);
  padding: 8px 10px;
  border-radius: 11px;
}

.stats-list dt {
  font-size: 0.86rem;
  color: var(--text-dim);
}

.stats-list dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.hint-card p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.45;
  font-size: 0.9rem;
}

.canvas-panel {
  min-height: 0;
}

.canvas-wrapper {
  width: 100%;
  height: 100%;
  min-height: 560px;
  background:
    linear-gradient(145deg, rgba(255, 245, 250, 0.95) 0%, rgba(248, 232, 239, 0.93) 100%);
  border: 1px solid #eacfdc;
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  touch-action: none;
}

#mindmapSvg {
  width: 100%;
  height: 100%;
}

.link-path {
  fill: none;
  stroke: var(--link);
  stroke-width: 2;
  opacity: 0.9;
}

.link-path.status-in-progress {
  stroke: #c98ea5;
}

.link-path.status-completed {
  stroke: #98bca7;
}

.link-path.status-bug {
  stroke: #c88f98;
}

.node-group {
  cursor: pointer;
}

.node-card {
  width: 250px;
  height: 94px;
  fill: #fff8fb;
  stroke: #dfc2cf;
  stroke-width: 1.4;
  filter: drop-shadow(0 10px 16px rgba(116, 75, 96, 0.12));
}

.node-group:hover .node-card {
  fill: #fff;
  stroke: #ce9cb2;
}

.node-group.selected .node-card {
  fill: var(--highlight);
  stroke: #b56d89;
  stroke-width: 2;
}

.node-status-dot {
  stroke: rgba(255, 255, 255, 0.9);
  stroke-width: 1;
}

.status-pending {
  fill: var(--pending);
}

.status-in-progress {
  fill: var(--in-progress);
}

.status-completed {
  fill: var(--completed);
}

.status-bug {
  fill: var(--bug);
}

.node-title {
  font-size: 15px;
  font-weight: 600;
  fill: var(--text);
}

.node-subtitle {
  font-size: 12px;
  fill: var(--text-dim);
}

.node-badge {
  fill: #f2e2ea;
  stroke: #dfc2cf;
  stroke-width: 1;
}

.node-badge-text {
  font-size: 10px;
  fill: #7a5d6a;
}

.progress-ring {
  fill: none;
  stroke: #cd8ea6;
  stroke-width: 2;
  stroke-dasharray: 6 5;
  animation: progressDash 1.2s linear infinite;
}

@keyframes progressDash {
  from {
    stroke-dashoffset: 0;
  }
  to {
    stroke-dashoffset: -44;
  }
}

.empty-state {
  fill: #7f6a74;
  font-size: 20px;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
}

.modal.hidden {
  display: none;
}

.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(84, 56, 71, 0.42);
  backdrop-filter: blur(2px);
}

.modal-card {
  position: relative;
  width: min(700px, calc(100vw - 28px));
  max-height: calc(100vh - 28px);
  overflow: auto;
  padding: 20px;
  background: #fff9fc;
  border: 1px solid #e8cada;
  border-radius: 18px;
  box-shadow: 0 24px 50px rgba(87, 53, 70, 0.28);
}

.modal-card h2 {
  margin: 0 0 12px;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid #d2aabb;
  background: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  color: #8a5f70;
}

.node-form {
  display: grid;
  gap: 12px;
}

.node-form label {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.time-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 0.82rem;
  color: #8b6c7b;
}

.child-create {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.modal-actions {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

@media (max-width: 1080px) {
  .top-bar {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .board-layout {
    grid-template-columns: 1fr;
  }

  .side-panel {
    order: 2;
  }

  .canvas-panel {
    order: 1;
  }

  .canvas-wrapper {
    min-height: 68vh;
  }
}

@media (max-width: 680px) {
  .app-shell {
    padding: 10px;
    gap: 10px;
  }

  .inline-group,
  .child-create,
  .modal-actions {
    grid-template-columns: 1fr;
    display: grid;
  }

  .time-grid {
    grid-template-columns: 1fr;
  }

  .toolbar-actions {
    grid-template-columns: 1fr 1fr;
  }
}