:root {
  --bg: #f6f7f4;
  --panel: #ffffff;
  --ink: #1d2530;
  --muted: #657182;
  --line: #d9dfdf;
  --accent: #2f8fff;
  --accent-strong: #136bd2;
  --danger: #e0493f;
  --shadow: 0 16px 40px rgba(24, 36, 50, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--bg);
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
}

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

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.topbar {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  color: white;
  background: #1d2530;
  font-weight: 800;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 19px;
  line-height: 1.25;
}

.brand p {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr) 280px;
}

.panel {
  min-height: calc(100vh - 72px);
  background: var(--panel);
  border-right: 1px solid var(--line);
  overflow: auto;
}

.right-panel {
  border-right: 0;
  border-left: 1px solid var(--line);
}

.panel-section {
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.panel-section h2 {
  font-size: 15px;
  margin-bottom: 12px;
}

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

label {
  display: grid;
  gap: 6px;
}

label > span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
  padding: 10px 11px;
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 143, 255, 0.15);
}

input[type="color"] {
  width: 44px;
  min-width: 44px;
  height: 38px;
  padding: 3px;
}

input[type="file"] {
  padding: 8px;
}

.link-guide,
.selection-summary,
.paste-zone span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.paste-zone {
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: center;
  gap: 10px;
  min-height: 60px;
  padding: 8px;
  border: 1px dashed #b8c3cd;
  border-radius: 6px;
  background: #fbfcfb;
  outline: none;
}

.paste-zone:focus,
.paste-zone.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 143, 255, 0.15);
}

.paste-zone img {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  object-fit: cover;
  background: #e8ecee;
}

.compact-paste-zone {
  min-height: 48px;
  grid-template-columns: 38px 1fr;
}

.compact-paste-zone img {
  width: 34px;
  height: 34px;
}

.preset-colors {
  display: flex;
  align-items: center;
  gap: 7px;
}

.preset-colors button {
  width: 30px;
  height: 30px;
  border: 2px solid #fff;
  border-radius: 999px;
  background: var(--swatch);
  box-shadow: 0 0 0 1px var(--line);
}

.preset-colors button:hover,
.preset-colors button:focus {
  box-shadow: 0 0 0 3px rgba(47, 143, 255, 0.2);
  outline: none;
}

.link-guide {
  margin: -2px 0 12px;
  padding: 10px;
  border-radius: 6px;
  background: #eef6ff;
  color: #245f9d;
  font-weight: 700;
}

.inline-controls {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.inline-controls label {
  flex: 1;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
}

.check-row input {
  width: 18px;
  height: 18px;
}

.check-row span {
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.primary-button,
.danger-button,
.icon-button,
.tool-button {
  border: 0;
  border-radius: 6px;
  min-height: 38px;
  font-weight: 800;
}

.primary-button {
  padding: 0 14px;
  color: #fff;
  background: var(--accent);
}

.compact-button {
  width: auto;
  min-width: 96px;
  min-height: 36px;
  padding: 0 12px;
  white-space: nowrap;
}

.primary-button:hover {
  background: var(--accent-strong);
}

.danger-button {
  padding: 0 14px;
  color: #fff;
  background: var(--danger);
}

.icon-button,
.tool-button {
  width: 38px;
  display: inline-grid;
  place-items: center;
  color: var(--ink);
  background: #eef2f5;
}

.icon-button:hover,
.tool-button:hover {
  background: #dfe8ee;
}

.file-button {
  position: relative;
  overflow: hidden;
}

.file-button input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f3f6f7;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented label {
  display: grid;
  place-items: center;
  min-height: 34px;
  border-radius: 5px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.segmented input:checked + label {
  color: #fff;
  background: var(--ink);
}

.board-wrap {
  min-width: 0;
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-rows: auto 1fr;
}

.board-toolbar {
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfb;
}

#chartTitle {
  max-width: 520px;
  border: 0;
  padding-left: 4px;
  background: transparent;
  font-size: 22px;
  font-weight: 900;
}

#chartTitle:focus {
  border: 0;
  box-shadow: inset 0 -2px 0 var(--accent);
}

.board-tools {
  display: flex;
  align-items: center;
  gap: 6px;
}

#zoomLabel {
  width: 54px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.board-viewport {
  min-height: 0;
  overflow: auto;
  background:
    linear-gradient(rgba(29, 37, 48, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 37, 48, 0.055) 1px, transparent 1px),
    #eef1ee;
  background-size: 32px 32px;
}

.board {
  width: 1600px;
  height: 1000px;
  position: relative;
  transform-origin: 0 0;
  background: #fffefa;
  box-shadow: var(--shadow);
  margin: 28px;
  overflow: hidden;
}

.edges,
.node-layer,
.text-layer {
  position: absolute;
  inset: 0;
}

.node-layer,
.text-layer {
  pointer-events: none;
}

.edge-path {
  fill: none;
  stroke-width: 3;
}

.group-shape {
  fill-opacity: 0.08;
  stroke-width: 3;
  stroke-dasharray: 10 7;
  cursor: pointer;
}

.group-shape.selected {
  stroke-width: 5;
  fill-opacity: 0.14;
}

.group-label rect {
  rx: 4;
  ry: 4;
}

.group-label text {
  fill: #fff;
  font-size: 15px;
  font-weight: 900;
}

.edge-label {
  cursor: pointer;
}

.edge-label rect {
  rx: 4;
  ry: 4;
  stroke: rgba(0, 0, 0, 0.08);
  stroke-width: 1;
}

.edge-label text {
  fill: #fff;
  font-size: 15px;
  font-weight: 900;
  paint-order: stroke;
  stroke: rgba(0, 0, 0, 0.12);
  stroke-width: 2px;
}

.edge-label.selected rect {
  stroke: #111;
  stroke-width: 2;
}

.person-node {
  position: absolute;
  width: 94px;
  min-height: 124px;
  display: grid;
  justify-items: center;
  align-content: start;
  gap: 6px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  padding: 0;
  text-align: center;
  touch-action: none;
  user-select: none;
  pointer-events: auto;
  -webkit-user-drag: none;
}

.person-node img {
  width: 74px;
  height: 74px;
  border: 4px solid var(--node-color, #2f8fff);
  border-radius: 6px;
  background: #e8ecee;
  object-fit: cover;
  box-shadow: 0 8px 20px rgba(29, 37, 48, 0.18);
  -webkit-user-drag: none;
}

.person-node .node-name {
  max-width: 94px;
  min-height: 26px;
  padding: 4px 6px;
  border-radius: 5px;
  color: #fff;
  background: var(--node-color, #2f8fff);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.person-node .node-note {
  max-width: 94px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.person-node.selected img {
  outline: 3px solid #111;
  outline-offset: 2px;
}

.person-node.link-source img {
  outline: 4px solid #f2a41a;
  outline-offset: 4px;
}

.person-node.multi-selected img {
  outline: 4px solid #00a6a6;
  outline-offset: 4px;
}

.text-box {
  position: absolute;
  min-width: 120px;
  min-height: 44px;
  display: grid;
  align-items: center;
  border: 2px solid transparent;
  border-radius: 6px;
  padding: 8px 10px;
  color: var(--text-color);
  background: var(--text-bg);
  font-size: var(--text-size);
  font-weight: 800;
  line-height: 1.35;
  text-align: var(--text-align);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  pointer-events: auto;
  touch-action: none;
  user-select: none;
  box-shadow: 0 8px 20px rgba(29, 37, 48, 0.12);
}

.text-box.selected {
  border-color: #111827;
}

.board-viewport.panning {
  cursor: grabbing;
}

.empty-state {
  display: grid;
  gap: 4px;
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: #f7f9fa;
}

.empty-state strong {
  color: var(--ink);
}

.hidden {
  display: none !important;
}

.list {
  display: grid;
  gap: 8px;
}

.selection-summary {
  margin-bottom: 10px;
  padding: 9px 10px;
  border-radius: 6px;
  background: #edf8f6;
  color: #14706d;
  font-weight: 700;
}

.group-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px 64px;
  gap: 8px;
  margin-bottom: 8px;
}

.group-tools input[type="color"] {
  width: 44px;
}

.group-preset-colors {
  margin-bottom: 12px;
}

.subhead {
  margin-top: 18px;
}

.list button {
  display: grid;
  grid-template-columns: 30px 1fr 32px;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  text-align: left;
}

.list button.group-row {
  grid-template-columns: 18px 1fr 32px;
}

.list .row-delete {
  width: 28px;
  height: 28px;
  min-height: 28px;
  display: grid;
  place-items: center;
  border-radius: 5px;
  color: #fff;
  background: var(--danger);
  font-weight: 900;
}

.list .group-dot {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: var(--group-color);
}

.list button.is-selected {
  border-color: #00a6a6;
  box-shadow: 0 0 0 3px rgba(0, 166, 166, 0.14);
}

.list img {
  width: 30px;
  height: 30px;
  border-radius: 5px;
  object-fit: cover;
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 280px minmax(0, 1fr);
  }

  .right-panel {
    grid-column: 1 / -1;
    min-height: auto;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  .topbar {
    height: auto;
    align-items: flex-start;
    flex-direction: column;
  }

  .top-actions {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .workspace {
    display: flex;
    flex-direction: column;
  }

  .panel {
    min-height: auto;
    border-right: 0;
  }

  .board-wrap {
    min-height: 72vh;
  }

  .board-toolbar {
    align-items: stretch;
    height: auto;
    flex-direction: column;
  }

  #chartTitle {
    max-width: none;
    font-size: 20px;
  }
}