:root {
  --bg: #f7f6f3;
  --panel: #fefefd;
  --ink: #22313f;
  --muted: #6b7a89;
  --line: #b8c6d3;
  --accent: #1d5c63;
  --accent-soft: #d8ecef;
  --danger: #a73a3a;
  --node-border: #88a6b8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  width: 100%;
  font-family: "Segoe UI", "Yu Gothic UI", "Hiragino Sans", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

/* ===== アプリ部分（ビューポート全体） ===== */
.app-wrapper {
  height: 100svh;
  display: grid;
  grid-template-rows: auto auto 1fr;
  background:
    radial-gradient(circle at 12% 18%, #f4ece0 0%, transparent 35%),
    radial-gradient(circle at 80% 10%, #e6f0f2 0%, transparent 34%),
    var(--bg);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid #d6dedf;
  background: linear-gradient(120deg, #f7efe7, #edf5f6);
}

.hierarchy-bar {
  display: grid;
  gap: 4px;
  padding: 6px 0 8px;
  border-bottom: 1px solid #d6dedf;
  background: rgba(255,255,255,0.66);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.hierarchy-label {
  color: var(--muted);
  font-weight: 700;
  white-space: nowrap;
  padding-left: 16px;
  font-size: 0.82rem;
}

.hierarchy-fields {
  display: flex;
  align-items: stretch;
  padding-left: 80px;
  min-width: max-content;
}

.hierarchy-col {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-right: 22px;
}

.hierarchy-col::after {
  content: "";
  position: absolute;
  right: 0;
  top: -6px;
  bottom: -8px;
  border-right: 2px dashed rgba(33,65,84,0.58);
  pointer-events: none;
}

.hierarchy-input {
  width: 180px;
  border: 1px solid #9db0bc;
  border-radius: 8px;
  padding: 5px 8px;
  font: inherit;
  font-size: 1rem;
  background: #fff;
  touch-action: manipulation;
}

.hierarchy-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.topbar h1 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid transparent;
  outline: none;
  min-width: 60px;
  cursor: text;
  transition: border-color 0.15s, background 0.15s;
  white-space: nowrap;
}

.topbar h1:hover { border-color: var(--line); background: rgba(255,255,255,0.55); }
.topbar h1:focus { border-color: var(--accent); background: #fff; box-shadow: 0 0 0 2px var(--accent-soft); }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

button {
  border: 1px solid #8ea8b0;
  background: var(--panel);
  color: var(--ink);
  padding: 7px 11px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  min-height: 36px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

button:hover:enabled {
  border-color: var(--accent);
  background: #f4fbfc;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

#export-excel-btn {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

#delete-node-btn:not(:disabled) {
  border-color: var(--danger);
  color: var(--danger);
}

/* ===== ボード ===== */
.board {
  position: relative;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

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

.level-guide-layer {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.level-guide {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  border-left: 2px dashed rgba(33,65,84,0.62);
  pointer-events: auto;
  cursor: ew-resize;
}

.level-guide::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0;
  width: 14px;
  height: 100%;
}

.level-guide:hover, .level-guide.resizing {
  border-left-color: rgba(29,92,99,0.8);
}

body.resizing-level, body.resizing-level * { cursor: ew-resize !important; }

.link-layer { pointer-events: none; }

/* ===== ノード ===== */
.node {
  position: absolute;
  width: 180px;
  min-height: 52px;
  border: 2px solid var(--node-border);
  background: #fff;
  border-radius: 12px;
  padding: 10px 12px;
  box-shadow: 0 8px 22px rgba(34,49,63,0.1);
  user-select: none;
  cursor: pointer;
  line-height: 1.3;
  word-break: break-word;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
  -webkit-tap-highlight-color: transparent;
}

.node:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(34,49,63,0.14); }
.node.selected { border-color: var(--accent); background: var(--accent-soft); }
.node.root { border-color: #d29d54; }
.node.drag-source { opacity: 0.6; transform: scale(0.98); }
.node.drop-target { border-color: #2d8f9b; box-shadow: 0 0 0 3px rgba(45,143,155,0.25); }

.gap-zone {
  position: absolute;
  width: 180px;
  height: 20px;
  border: 2px dashed transparent;
  border-radius: 4px;
  z-index: 5;
  transition: border-color 80ms ease, background 80ms ease;
}

.gap-zone.drop-target-zone {
  border-color: #2d8f9b;
  background: rgba(45,143,155,0.12);
}

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

.branch-toggle {
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid #90a8b6;
  background: #fff;
  color: var(--ink);
  font-weight: 700;
  line-height: 1;
  padding: 0;
  z-index: 6;
  cursor: pointer;
  touch-action: manipulation;
  min-height: unset;
}

.branch-toggle:hover { border-color: var(--accent); color: var(--accent); background: #f4fbfc; }

/* ===== コンテキストメニュー ===== */
.context-menu {
  position: fixed;
  display: none;
  min-width: 160px;
  padding: 6px;
  border: 1px solid #b7c8cf;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 14px 24px rgba(34,49,63,0.2);
  z-index: 20;
}

.context-menu.visible { display: grid; gap: 4px; }

.context-menu button {
  text-align: left;
  background: #fff;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 10px;
  min-height: 40px;
}

.context-menu button:hover { border-color: #b9d3d9; background: #f1f9fb; }

/* ===== ノード編集モーダル ===== */
.node-editor {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(34,49,63,0.28);
  z-index: 30;
}

.node-editor.visible { display: flex; }

.node-editor-card {
  width: min(92vw, 360px);
  padding: 16px;
  border: 1px solid #b8c6d3;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 18px 28px rgba(34,49,63,0.22);
}

.node-editor-card h2 { margin: 0 0 10px; font-size: 1.05rem; }

.node-editor-card label {
  display: grid;
  gap: 6px;
  margin-bottom: 10px;
  font-weight: 600;
  font-size: 0.9rem;
}

.node-editor-card input[type="text"] {
  border: 1px solid #9db0bc;
  border-radius: 8px;
  padding: 8px 10px;
  font: inherit;
  font-size: 1rem;
  touch-action: manipulation;
}

.node-editor-card input[type="color"] {
  width: 100%;
  height: 40px;
  border: 1px solid #9db0bc;
  border-radius: 8px;
  padding: 2px;
  background: #fff;
}

.color-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 6px 0 14px;
}

.palette-swatch {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 2px solid rgba(34,49,63,0.12);
  padding: 0;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.8);
  min-height: unset;
}

.palette-swatch[data-color="#ffffff"]  { background: #ffffff; }
.palette-swatch[data-color="#e3e7eb"]  { background: #e3e7eb; }
.palette-swatch[data-color="#fff4d6"]  { background: #fff4d6; }
.palette-swatch[data-color="#dff3ea"]  { background: #dff3ea; }
.palette-swatch[data-color="#dcecff"]  { background: #dcecff; }
.palette-swatch[data-color="#f1e4ff"]  { background: #f1e4ff; }
.palette-swatch[data-color="#ffe0db"]  { background: #ffe0db; }
.palette-swatch[data-color="#e9f7d8"]  { background: #e9f7d8; }

.palette-swatch:hover { transform: translateY(-1px); border-color: rgba(29,92,99,0.45); }
.palette-swatch.selected { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(29,92,99,0.18); }

.node-editor-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

#editor-save-btn {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ===== アプリ外コンテンツ ===== */
.info-section {
  background: #fff;
  border-top: 2px solid #d6dedf;
  padding: 2rem 1rem;
}

.info-inner {
  max-width: 720px;
  margin: 0 auto;
}

.info-inner h2 {
  font-size: 1rem;
  color: var(--accent);
  margin: 1.5rem 0 0.6rem;
  border-bottom: 2px solid var(--accent-soft);
  padding-bottom: 0.3rem;
}

.info-inner h2:first-child { margin-top: 0; }

.info-inner ol, .info-inner p {
  font-size: 0.88rem;
  color: #555;
  line-height: 1.7;
}

.info-inner ol { padding-left: 1.4rem; }
.info-inner li { margin-bottom: 0.4rem; }

.shortcut-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.shortcut-table td {
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid #eee;
}

.shortcut-table td:first-child {
  font-weight: 700;
  background: #f5f5f5;
  width: 120px;
  font-family: monospace;
}

.site-footer {
  text-align: center;
  padding: 1.5rem 1rem;
  font-size: 0.82rem;
  color: #888;
  background: #f7f6f3;
  border-top: 1px solid #e0e0e0;
}

.site-footer a { color: #666; }

/* ===== アフィリエイト ===== */
.affiliate-block {
  margin: 1rem 0 1.5rem;
  padding: 1rem;
  background: #f9f9f9;
  border-radius: 8px;
  border: 1px solid #e0e0e0;
  text-align: center;
}
.affiliate-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
  background: #999;
  padding: 1px 6px;
  border-radius: 3px;
  margin-bottom: 0.5rem;
}
.affiliate-desc {
  font-size: 0.85rem;
  color: #555;
  margin-bottom: 0.75rem;
}

/* ===== モバイル ===== */
@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 12px;
    gap: 8px;
  }

  .topbar h1 { font-size: 1rem; }

  .toolbar {
    gap: 5px;
  }

  button {
    padding: 6px 8px;
    font-size: 0.78rem;
    min-height: 36px;
  }

  .node { width: 140px; min-height: 44px; font-size: 0.85rem; padding: 8px 10px; }

  .gap-zone { width: 140px; }
}