/* ================================================================
   Brainstorm — 思考室 (Shikōshitsu) v2
   茶室・余白・墨・金継ぎ (kintsugi) の感覚で「考える場」を作る。
   - 和紙のテクスチャ (washi)、墨色のタイポ、金の継ぎ目で島を結ぶ
   - 落ち着いた warm cream ベース、点・線・墨で構成
   - フォント: Shippori Mincho (display) + Zen Kaku Gothic New (body)
   - 既存 dashboard の Neo Futura とは別系統。意図的に切り替える
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@500;700;800&family=Zen+Kaku+Gothic+New:wght@400;500;700&family=Klee+One:wght@600&display=swap');

/* ---------- tokens ---------- */
.standalone-brainstorm,
.standalone-brainstorm * {
  --washi:         #f4ede0;     /* 和紙 (paper) */
  --washi-deep:    #ebe1d0;
  --washi-rim:     #d6c8ad;
  --sumi:          #1a1814;     /* 墨 (ink) */
  --sumi-soft:     #3d3830;
  --sumi-mute:     #7c7466;
  --sumi-ghost:    #b9b0a0;
  --kin:           #b08938;     /* 金 (gold leaf, kintsugi) */
  --kin-bright:    #d4ab57;
  --kin-pale:      #f0e3c0;
  --vermilion:     #b94a3a;     /* 朱 (vermilion accent) */
  --indigo:        #2b3a5a;     /* 藍 */
  --moss:          #6d7a4a;     /* 苔 */

  /* island palette (washi-stained) — auto-cycled */
  --isle-1: #f3dac0;   /* apricot wash */
  --isle-2: #d7e3c8;   /* tea-green wash */
  --isle-3: #e1d5e6;   /* aubergine wash */
  --isle-4: #c8d8e3;   /* hazy indigo */
  --isle-5: #efd6cd;   /* peach blossom */
  --isle-6: #d8d2bd;   /* aged hemp */
  --isle-7: #c9d8c9;   /* young pine */
  --isle-8: #e6c8a6;   /* persimmon cream */

  --isle-1-rim: #c79768;
  --isle-2-rim: #8aa56a;
  --isle-3-rim: #8e7a99;
  --isle-4-rim: #6e8aa5;
  --isle-5-rim: #c68272;
  --isle-6-rim: #9a8f6a;
  --isle-7-rim: #7a9479;
  --isle-8-rim: #b27a45;

  --shadow-leaf: 0 2px 4px rgba(26, 24, 20, 0.05),
                 0 10px 28px -8px rgba(26, 24, 20, 0.15);
  --shadow-press: 0 1px 0 rgba(26, 24, 20, 0.10) inset,
                  0 6px 14px -6px rgba(26, 24, 20, 0.18);
}

/* ---------- page chrome ---------- */
body.standalone-brainstorm {
  margin: 0;
  padding: 0;
  font-family: 'Zen Kaku Gothic New', system-ui, sans-serif;
  font-weight: 400;
  font-feature-settings: "palt" 1;
  color: var(--sumi);
  background-color: #efe7d6;
  background-image:
    radial-gradient(circle at 14% 22%, rgba(122, 104, 70, 0.12) 0.6px, transparent 1px),
    radial-gradient(circle at 73% 18%, rgba(122, 104, 70, 0.10) 0.6px, transparent 1px),
    radial-gradient(circle at 47% 64%, rgba(122, 104, 70, 0.08) 0.5px, transparent 1px),
    radial-gradient(circle at 88% 81%, rgba(122, 104, 70, 0.10) 0.6px, transparent 1px),
    radial-gradient(circle at 29% 91%, rgba(122, 104, 70, 0.08) 0.5px, transparent 1px),
    linear-gradient(180deg, #f4ecd9 0%, #ede2cb 55%, #e6d9bd 100%);
  background-size: 220px 220px, 280px 280px, 340px 340px, 260px 260px, 300px 300px, 100% 100%;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.standalone-brainstorm .standalone-header {
  padding: 18px 24px 8px;
  border: none;
  background: transparent;
}

body.standalone-brainstorm .standalone-header h1 {
  font-family: 'Shippori Mincho', 'Yu Mincho', 'Hiragino Mincho ProN', serif;
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: 0.16em;
  color: var(--sumi);
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
body.standalone-brainstorm .standalone-header h1::before {
  content: "";
  display: inline-block;
  width: 36px;
  height: 1.5px;
  background: linear-gradient(90deg, transparent 0, var(--kin) 30%, var(--kin-bright) 60%, transparent 100%);
  vertical-align: middle;
  align-self: center;
}
body.standalone-brainstorm .standalone-header h1::after {
  content: "思考室";
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  color: var(--sumi-mute);
  font-weight: 500;
  margin-left: 4px;
}

/* ---------- start screen ---------- */
.brainstorm-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 8px 22px 80px;
}

.brainstorm-start {
  max-width: 720px;
  margin: 32px auto;
  padding: 40px 44px 48px;
  background: var(--washi);
  border: 1px solid var(--washi-rim);
  border-radius: 2px;
  box-shadow: var(--shadow-leaf);
  position: relative;
  background-image:
    repeating-linear-gradient(0deg, rgba(176, 137, 56, 0.02) 0, rgba(176, 137, 56, 0.02) 1px, transparent 1px, transparent 4px),
    repeating-linear-gradient(90deg, rgba(176, 137, 56, 0.02) 0, rgba(176, 137, 56, 0.02) 1px, transparent 1px, transparent 4px);
}
.brainstorm-start::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--kin) 0%, var(--kin-bright) 25%, var(--kin) 50%, var(--kin-bright) 75%, var(--kin) 100%);
  border-radius: 2px 2px 0 0;
}

.brainstorm-start h3 {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--sumi);
  margin: 0 0 6px;
}
.brainstorm-start > p {
  color: var(--sumi-mute) !important;
  font-size: 0.92rem !important;
  letter-spacing: 0.04em;
  margin-bottom: 24px !important;
  line-height: 1.7;
}

.theme-input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
}
.theme-input-group input[type="text"] {
  flex: 1;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 1.02rem;
  border: none;
  border-bottom: 1.5px solid var(--sumi-soft);
  background: transparent;
  color: var(--sumi);
  outline: none;
  transition: border-color 0.2s;
  letter-spacing: 0.03em;
}
.theme-input-group input[type="text"]::placeholder {
  color: var(--sumi-ghost);
  font-style: italic;
}
.theme-input-group input[type="text"]:focus {
  border-bottom-color: var(--kin);
}
.theme-input-group button {
  font-family: 'Shippori Mincho', serif;
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 24px;
  border: 1.5px solid var(--sumi);
  background: var(--sumi);
  color: var(--washi);
  letter-spacing: 0.15em;
  cursor: pointer;
  border-radius: 0;
  min-height: 48px;
  min-width: 90px;
  transition: all 0.18s;
}
.theme-input-group button:hover {
  background: transparent;
  color: var(--sumi);
}

.session-tabs {
  display: flex;
  gap: 0;
  margin-top: 8px;
  border-bottom: 1px solid var(--washi-rim);
}
.session-tab {
  font-family: inherit;
  font-size: 0.86rem;
  padding: 10px 18px;
  border: none;
  background: transparent;
  color: var(--sumi-mute);
  cursor: pointer;
  letter-spacing: 0.08em;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  min-height: 44px;
  transition: color 0.15s;
}
.session-tab:hover { color: var(--sumi); }
.session-tab.active {
  color: var(--sumi);
  border-bottom-color: var(--kin);
  font-weight: 700;
}

.session-list { margin-top: 18px; }

.session-item {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--washi-rim);
  background: transparent;
}
.session-item:last-child { border-bottom: none; }
.session-swipe-layer {
  position: relative;
  z-index: 2;
  background: var(--washi);
  display: flex;
  align-items: stretch;
  will-change: transform;
}
.session-main {
  flex: 1;
  padding: 16px 4px 14px;
  cursor: pointer;
  min-height: 56px;
}
.session-theme {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.04rem;
  font-weight: 500;
  color: var(--sumi);
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}
.session-meta {
  font-size: 0.74rem;
  color: var(--sumi-mute);
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}
.sess-rename-input {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.04rem;
  padding: 4px 6px;
  border: 1px solid var(--kin);
  background: var(--washi-deep);
  width: 100%;
  outline: none;
  color: var(--sumi);
}

.session-actions-hover {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-right: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
}
.session-item:hover .session-actions-hover {
  opacity: 1;
  pointer-events: auto;
}
.session-actions-swipe {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  z-index: 1;
  padding: 0 8px;
  background: var(--washi-deep);
}
.sess-act {
  background: transparent;
  border: none;
  font-size: 1.05rem;
  width: 44px;
  height: 44px;
  cursor: pointer;
  border-radius: 50%;
  color: var(--sumi-soft);
  transition: background 0.15s;
}
.sess-act:hover { background: var(--washi-rim); }

/* ---------- workspace ---------- */
.brainstorm-workspace {
  display: grid;
  grid-template-columns: minmax(320px, 380px) 1fr;
  gap: 22px;
  margin-top: 16px;
  min-height: calc(100vh - 240px);
}
@media (max-width: 880px) {
  .brainstorm-workspace { grid-template-columns: 1fr; }
}

.workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--washi-rim);
}
.workspace-title {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--sumi);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.workspace-title-mark {
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: linear-gradient(180deg, var(--kin-bright), var(--kin));
}
.btn-back {
  font-family: inherit;
  font-size: 0.82rem;
  background: transparent;
  border: 1px solid var(--sumi-soft);
  color: var(--sumi);
  padding: 8px 16px;
  cursor: pointer;
  letter-spacing: 0.08em;
  border-radius: 0;
  min-height: 38px;
}
.btn-back:hover { background: var(--sumi); color: var(--washi); }

/* ---------- phase bar (五段の階梯) ---------- */
.phase-bar {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 14px 4px;
  margin: 0 0 14px;
  overflow-x: auto;
  scrollbar-width: none;
}
.phase-bar::-webkit-scrollbar { display: none; }
.phase-step {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 14px;
  font-family: 'Shippori Mincho', serif;
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--sumi-ghost);
  white-space: nowrap;
  min-height: 44px;
  position: relative;
  user-select: none;
}
.phase-step .phase-num {
  font-family: 'Klee One', serif;
  font-size: 0.78rem;
  color: var(--sumi-ghost);
  font-weight: 600;
}
.phase-step.completed { color: var(--sumi-soft); }
.phase-step.completed .phase-num { color: var(--kin); }
.phase-step.active {
  color: var(--sumi);
  font-weight: 700;
}
.phase-step.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 1.5px;
  background: linear-gradient(90deg, var(--kin) 0%, var(--kin-bright) 50%, var(--kin) 100%);
}
.phase-step.active .phase-num { color: var(--kin-bright); }
.phase-arrow {
  color: var(--sumi-ghost);
  font-size: 0.8rem;
  padding: 0 2px;
  user-select: none;
}

/* ---------- chat panel ---------- */
.chat-panel {
  display: flex;
  flex-direction: column;
  background: var(--washi);
  border: 1px solid var(--washi-rim);
  border-radius: 2px;
  box-shadow: var(--shadow-leaf);
  position: relative;
  min-height: 480px;
  max-height: calc(100vh - 230px);
}
.chat-panel::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--sumi) 0%, var(--sumi) 30%, var(--kin) 30%, var(--kin) 35%, var(--sumi) 35%, var(--sumi) 100%);
}

.chat-panel-title {
  font-family: 'Shippori Mincho', serif;
  font-size: 0.86rem;
  letter-spacing: 0.22em;
  color: var(--sumi-mute);
  padding: 12px 16px 8px;
  font-weight: 500;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 4px 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.chat-messages::-webkit-scrollbar { width: 6px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--washi-rim); border-radius: 3px; }

.chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.chat-msg-avatar {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--washi-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-family: 'Shippori Mincho', serif;
  color: var(--sumi);
  border: 1px solid var(--washi-rim);
}
.chat-msg.user .chat-msg-avatar {
  background: var(--sumi);
  color: var(--washi);
  border-color: var(--sumi);
}
.chat-msg.assistant .chat-msg-avatar {
  background: var(--kin-pale);
  color: var(--sumi);
  border-color: var(--kin);
}
.chat-msg-bubble {
  flex: 1;
  padding: 10px 14px;
  background: var(--washi-deep);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--sumi);
  border-radius: 2px;
  letter-spacing: 0.02em;
  position: relative;
  word-break: break-word;
}
.chat-msg.user .chat-msg-bubble {
  background: #f8efdb;
  border-left: 2px solid var(--kin);
}
.chat-msg.assistant .chat-msg-bubble {
  background: transparent;
  border-left: 2px solid var(--washi-rim);
  padding-left: 12px;
}
.chat-streaming::after {
  content: "•";
  animation: ink-pulse 1.4s ease-in-out infinite;
  color: var(--kin);
  margin-left: 4px;
}
@keyframes ink-pulse {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 1; }
}

.chat-input-area {
  border-top: 1px solid var(--washi-rim);
  padding: 12px 14px 14px;
  background: var(--washi);
}
.chat-input-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.chat-input-row input[type="text"] {
  flex: 1;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.96rem;
  border: 1px solid var(--washi-rim);
  background: var(--washi-deep);
  color: var(--sumi);
  outline: none;
  border-radius: 2px;
  min-height: 44px;
  letter-spacing: 0.02em;
}
.chat-input-row input[type="text"]:focus {
  border-color: var(--kin);
  box-shadow: 0 0 0 2px var(--kin-pale);
}
.chat-input-row button {
  width: 48px;
  min-height: 44px;
  background: var(--sumi);
  color: var(--washi);
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  border-radius: 2px;
  font-weight: 700;
  transition: background 0.15s;
}
.chat-input-row button:hover:not(:disabled) { background: var(--kin); color: var(--sumi); }
.chat-input-row button:disabled { opacity: 0.4; cursor: wait; }

.chat-input-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--sumi-mute);
  margin-top: 10px;
  letter-spacing: 0.04em;
  cursor: pointer;
  min-height: 32px;
}
.chat-input-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--kin);
  cursor: pointer;
}

/* ---------- side panel (right) ---------- */
.side-panel {
  display: flex;
  flex-direction: column;
  background: var(--washi);
  border: 1px solid var(--washi-rim);
  border-radius: 2px;
  box-shadow: var(--shadow-leaf);
  position: relative;
  min-height: 480px;
  max-height: calc(100vh - 230px);
  overflow: hidden;
}
.side-panel::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--kin) 0%, var(--kin-bright) 40%, var(--kin) 80%, transparent 100%);
}

.side-panel-header {
  font-family: 'Shippori Mincho', serif;
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--sumi);
  padding: 14px 18px 10px;
  border-bottom: 1px solid var(--washi-rim);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.side-panel-body {
  flex: 1;
  overflow: hidden;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 400px;
}
.side-panel-body.scrolling {
  overflow-y: auto;
  padding: 0;
}

/* small inline buttons */
.btn-quiet {
  font-family: inherit;
  font-size: 0.78rem;
  padding: 6px 12px;
  border: 1px solid var(--sumi-soft);
  background: transparent;
  color: var(--sumi);
  cursor: pointer;
  letter-spacing: 0.08em;
  border-radius: 0;
  min-height: 32px;
  transition: all 0.15s;
}
.btn-quiet:hover { background: var(--sumi); color: var(--washi); }
.btn-gold {
  font-family: inherit;
  font-size: 0.78rem;
  padding: 6px 12px;
  border: 1px solid var(--kin);
  background: var(--kin-pale);
  color: var(--sumi);
  cursor: pointer;
  letter-spacing: 0.08em;
  border-radius: 0;
  min-height: 32px;
  font-weight: 700;
  transition: all 0.15s;
}
.btn-gold:hover { background: var(--kin); color: var(--washi); }

/* ---------- question list (発散) ---------- */
.question-list-wrap {
  padding: 16px 18px 18px;
  overflow-y: auto;
  flex: 1;
}
.question-list-wrap::-webkit-scrollbar { width: 6px; }
.question-list-wrap::-webkit-scrollbar-thumb { background: var(--washi-rim); }

.question-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 8px;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--sumi);
  border-bottom: 1px dashed var(--washi-rim);
  letter-spacing: 0.02em;
  transition: background 0.12s;
}
.question-item:hover { background: rgba(176, 137, 56, 0.05); }
.q-id {
  font-family: 'Klee One', 'Shippori Mincho', serif;
  font-size: 0.78rem;
  color: var(--kin);
  font-weight: 700;
  min-width: 28px;
  letter-spacing: 0.06em;
}
.q-text { flex: 1; }
.q-author {
  font-size: 0.75rem;
  color: var(--sumi-mute);
  width: 22px;
  text-align: center;
}
.q-delete {
  background: transparent;
  border: none;
  color: var(--sumi-ghost);
  cursor: pointer;
  font-size: 0.95rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s;
}
.question-item:hover .q-delete { opacity: 1; }
.q-delete:hover { color: var(--vermilion); background: rgba(185, 74, 58, 0.08); }

.empty-hint {
  color: var(--sumi-mute);
  font-size: 0.9rem;
  text-align: center;
  padding: 40px 20px;
  line-height: 1.8;
  font-family: 'Shippori Mincho', serif;
  letter-spacing: 0.08em;
}
.empty-hint::before {
  content: "—";
  display: block;
  margin-bottom: 12px;
  color: var(--kin);
  font-size: 1.2rem;
}

/* ---------- 島 (canvas) view ---------- */
.island-viewport {
  position: relative;
  flex: 1;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, rgba(176, 137, 56, 0.04) 0, transparent 60%),
    radial-gradient(circle at 75% 80%, rgba(43, 58, 90, 0.04) 0, transparent 60%),
    var(--washi-deep);
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.island-viewport.panning { cursor: grabbing; }

.island-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 4000px;
  height: 3000px;
  transform-origin: 0 0;
  will-change: transform;
}

.island-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.island-grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(122, 104, 70, 0.16) 1px, transparent 1.5px);
  background-size: 28px 28px;
  pointer-events: none;
  opacity: 0.5;
}

.island {
  position: absolute;
  pointer-events: none;
}
.island-shape {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.island-label {
  position: absolute;
  top: -28px;
  left: 16px;
  font-family: 'Shippori Mincho', serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--sumi);
  padding: 4px 12px 4px 14px;
  background: var(--washi);
  border: 1px solid var(--sumi);
  border-radius: 0;
  pointer-events: auto;
  cursor: text;
  outline: none;
  min-width: 80px;
  max-width: 280px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  box-shadow: 2px 2px 0 var(--washi-rim);
}
.island-label::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px;
  width: 6px; height: 100%;
  background: var(--isle-rim, var(--kin));
}
.island-label:focus {
  background: #fffdf5;
  box-shadow: 2px 2px 0 var(--kin), 0 0 0 2px var(--kin-pale);
  overflow: visible;
}
.island-actions {
  position: absolute;
  top: -28px;
  right: 8px;
  display: flex;
  gap: 4px;
  pointer-events: auto;
  opacity: 0;
  transition: opacity 0.15s;
}
.island:hover .island-actions,
.island.selected .island-actions {
  opacity: 1;
}
.island-act {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--sumi-soft);
  background: var(--washi);
  color: var(--sumi);
  cursor: pointer;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.island-act:hover { background: var(--sumi); color: var(--washi); }

/* sticky notes */
.sticky-note {
  position: absolute;
  width: 168px;
  min-height: 64px;
  padding: 12px 14px 14px;
  background: #fffaeb;
  color: var(--sumi);
  font-size: 0.86rem;
  line-height: 1.55;
  border-radius: 1px;
  box-shadow: var(--shadow-leaf);
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  pointer-events: auto;
  transition: box-shadow 0.15s;
  z-index: 10;
  letter-spacing: 0.02em;
  border: 1px solid rgba(176, 137, 56, 0.25);
  will-change: transform;
}
.sticky-note::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 6px;
  background: linear-gradient(180deg, var(--kin-bright) 0%, var(--kin) 100%);
  border-radius: 1px;
  box-shadow: 0 1px 2px rgba(176, 137, 56, 0.4);
  opacity: 0.85;
}
.sticky-note.author-claude {
  background: #f1ede0;
  border-color: rgba(60, 80, 50, 0.2);
}
.sticky-note.author-claude::before {
  background: linear-gradient(180deg, #8aa56a 0%, #6d7a4a 100%);
}
.sticky-note .note-qid {
  font-family: 'Klee One', serif;
  font-size: 0.7rem;
  color: var(--kin);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 2px;
}
.sticky-note.author-claude .note-qid { color: var(--moss); }
.sticky-note:hover {
  box-shadow: 0 4px 8px rgba(26, 24, 20, 0.08),
              0 16px 36px -8px rgba(26, 24, 20, 0.22);
  z-index: 20;
}
.sticky-note.dragging {
  cursor: grabbing;
  box-shadow: 0 8px 24px rgba(26, 24, 20, 0.25);
  z-index: 1000;
}

/* canvas toolbar */
.canvas-toolbar {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  gap: 6px;
  background: var(--washi);
  border: 1px solid var(--washi-rim);
  padding: 6px;
  border-radius: 2px;
  box-shadow: var(--shadow-leaf);
  z-index: 100;
  align-items: center;
}
.canvas-tool-btn {
  width: 40px;
  height: 40px;
  border-radius: 2px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--sumi);
  cursor: pointer;
  font-size: 1rem;
  font-family: 'Shippori Mincho', serif;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.02em;
  transition: all 0.15s;
}
.canvas-tool-btn:hover {
  background: var(--washi-deep);
  border-color: var(--washi-rim);
}
.canvas-tool-btn.active {
  background: var(--sumi);
  color: var(--washi);
}

.canvas-zoom-display {
  font-family: 'Klee One', monospace;
  font-size: 0.74rem;
  color: var(--sumi-mute);
  padding: 0 8px;
  display: flex;
  align-items: center;
  min-width: 44px;
  justify-content: center;
  letter-spacing: 0.05em;
}

.canvas-floating-actions {
  position: absolute;
  bottom: 14px;
  left: 14px;
  display: flex;
  gap: 8px;
  z-index: 100;
}

/* note context menu */
.note-menu {
  position: fixed;
  background: var(--washi);
  border: 1px solid var(--sumi);
  border-radius: 2px;
  padding: 4px 0;
  box-shadow: var(--shadow-leaf);
  z-index: 2000;
  min-width: 180px;
}
.note-menu-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 10px 16px;
  font-family: inherit;
  font-size: 0.86rem;
  color: var(--sumi);
  cursor: pointer;
  letter-spacing: 0.04em;
  min-height: 44px;
}
.note-menu-item:hover { background: var(--washi-deep); }
.note-menu-item.danger { color: var(--vermilion); }
.note-menu-sep { height: 1px; background: var(--washi-rim); margin: 2px 0; }

/* ---------- 関係性 (structure) phase ---------- */
.relation-toolbar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 12px 18px;
  background: var(--washi);
  border-bottom: 1px solid var(--washi-rim);
}
.relation-type-pill {
  font-family: inherit;
  padding: 8px 12px;
  border: 1px solid var(--sumi-soft);
  background: transparent;
  color: var(--sumi);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  border-radius: 2px;
  min-height: 38px;
  transition: all 0.15s;
}
.relation-type-pill.active {
  background: var(--sumi);
  color: var(--washi);
}
.relation-type-pill[data-type="causal"].active { background: var(--indigo); border-color: var(--indigo); }
.relation-type-pill[data-type="opposing"].active { background: var(--vermilion); border-color: var(--vermilion); }
.relation-type-pill[data-type="mutual"].active { background: var(--moss); border-color: var(--moss); }
.relation-type-pill[data-type="contains"].active { background: var(--kin); border-color: var(--kin); color: var(--sumi); }

.relation-hint {
  font-size: 0.78rem;
  color: var(--sumi-mute);
  padding: 0 18px 10px;
  letter-spacing: 0.04em;
  font-style: italic;
}

.relation-list {
  padding: 12px 18px;
  overflow-y: auto;
  flex: 1;
  max-height: 200px;
  border-top: 1px solid var(--washi-rim);
}
.relation-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: 0.88rem;
  border-bottom: 1px dashed var(--washi-rim);
}
.relation-from, .relation-to {
  font-family: 'Shippori Mincho', serif;
  color: var(--sumi);
  font-weight: 500;
  flex: 1;
}
.relation-arrow {
  font-family: 'Shippori Mincho', serif;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border-radius: 2px;
  color: var(--washi);
}
.relation-arrow.causal { background: var(--indigo); }
.relation-arrow.opposing { background: var(--vermilion); }
.relation-arrow.mutual { background: var(--moss); }
.relation-arrow.contains { background: var(--kin); color: var(--sumi); }
.relation-remove {
  background: transparent;
  border: none;
  color: var(--sumi-ghost);
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
}
.relation-remove:hover { color: var(--vermilion); background: rgba(185, 74, 58, 0.08); }

/* SVG arrows */
.island-arrow {
  pointer-events: stroke;
  cursor: pointer;
  transition: stroke-width 0.15s;
}
.island-arrow:hover { stroke-width: 4 !important; }
.island-arrow-label {
  font-family: 'Shippori Mincho', serif;
  font-size: 13px;
  fill: var(--sumi);
  pointer-events: none;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.island-arrow-bg {
  fill: var(--washi);
  stroke: var(--washi-rim);
  stroke-width: 1;
}

/* connect mode: islands pulse */
.island-viewport.connect-mode .island-shape {
  cursor: crosshair;
  pointer-events: auto;
}
.island.connect-source .island-shape {
  filter: drop-shadow(0 0 8px var(--kin));
}

/* ---------- explore phase ---------- */
.explore-progress-row {
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--washi-rim);
}
.progress-bar {
  flex: 1;
  height: 4px;
  background: var(--washi-deep);
  position: relative;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--kin) 0%, var(--kin-bright) 100%);
  transition: width 0.4s ease;
}
.progress-text {
  font-family: 'Klee One', monospace;
  font-size: 0.82rem;
  color: var(--sumi-mute);
  letter-spacing: 0.06em;
  min-width: 52px;
  text-align: right;
}

.explore-list {
  padding: 12px 18px 18px;
  overflow-y: auto;
  flex: 1;
}
.explore-group-label {
  font-family: 'Shippori Mincho', serif;
  font-size: 0.86rem;
  color: var(--sumi-soft);
  letter-spacing: 0.16em;
  margin: 16px 0 6px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--washi-rim);
  font-weight: 700;
}
.explore-group-label:first-child { margin-top: 0; }
.explore-item {
  border-bottom: 1px dashed var(--washi-rim);
  padding: 12px 0;
}
.explore-item-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  min-height: 36px;
}
.explore-status {
  font-size: 0.78rem;
  width: 20px;
}
.explore-q-text {
  flex: 1;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--sumi);
}
.star-btn {
  background: transparent;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  filter: grayscale(1) opacity(0.4);
  transition: filter 0.15s;
}
.star-btn.starred { filter: none; }
.explore-item-body {
  padding: 8px 0 0 30px;
  font-size: 0.86rem;
}
.explore-quick {
  background: var(--kin-pale);
  border-left: 2px solid var(--kin);
  padding: 8px 12px;
  margin: 8px 0;
  color: var(--sumi);
  font-size: 0.86rem;
  line-height: 1.65;
  letter-spacing: 0.02em;
}
.explore-tama-note textarea {
  width: 100%;
  min-height: 72px;
  padding: 10px 12px;
  background: var(--washi-deep);
  border: 1px solid var(--washi-rim);
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--sumi);
  outline: none;
  resize: vertical;
  border-radius: 2px;
  line-height: 1.65;
  letter-spacing: 0.02em;
}
.explore-tama-note textarea:focus {
  border-color: var(--kin);
}

/* ---------- story phase ---------- */
.story-wrap {
  padding: 24px 28px 32px;
  overflow-y: auto;
  flex: 1;
}
.story-content {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.05rem;
  line-height: 2.0;
  color: var(--sumi);
  letter-spacing: 0.04em;
  white-space: pre-wrap;
  outline: none;
  padding: 12px 0;
  min-height: 300px;
}
.story-content:focus {
  background: rgba(176, 137, 56, 0.03);
}
.story-empty {
  text-align: center;
  padding: 40px 20px;
}

/* ---------- phase actions ---------- */
.phase-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--washi-rim);
  justify-content: flex-end;
}
.btn-next {
  font-family: 'Shippori Mincho', serif;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 12px 28px;
  border: 1.5px solid var(--sumi);
  background: var(--sumi);
  color: var(--washi);
  letter-spacing: 0.18em;
  cursor: pointer;
  border-radius: 0;
  min-height: 44px;
  transition: all 0.18s;
}
.btn-next:hover { background: var(--kin); color: var(--sumi); border-color: var(--kin); }
.btn-export {
  font-family: inherit;
  font-size: 0.84rem;
  padding: 10px 18px;
  border: 1px solid var(--sumi-soft);
  background: var(--washi);
  color: var(--sumi);
  cursor: pointer;
  letter-spacing: 0.08em;
  border-radius: 0;
  min-height: 42px;
}
.btn-export:hover { background: var(--sumi); color: var(--washi); }
.btn-export.gold { border-color: var(--kin); background: var(--kin-pale); }
.btn-export.gold:hover { background: var(--kin); color: var(--sumi); }

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ---------- iPad / touch tweaks ---------- */
@media (pointer: coarse) {
  .q-delete { opacity: 1; }
  .session-actions-hover { display: none; }
  .island-actions { opacity: 1; }
  .sticky-note { width: 180px; min-height: 72px; }
  .canvas-tool-btn { width: 48px; height: 48px; }
  .sess-act { width: 48px; height: 48px; }
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .brainstorm-start { padding: 28px 22px; }
  .chat-panel, .side-panel { max-height: 70vh; }
  .canvas-toolbar { right: 8px; top: 8px; }
}