/* ====== Root Vars ====== */
:root{
  --stageSize: 300px;
  --partSize: 120px;
  --dropSize: 72px;
  --dropLeft: -35.5%;
  --dropTop: 57.4%;
  --judgeOffsetX: 0px;
  --judgeOffsetY: 0px;
  --hintCircleOffsetX: 0px;
  --hintCircleOffsetY: 0px;
  --fischerMaxH: 200px;

  /* Theme */
  --accent: #3a68ff;
  --accent-soft: rgba(58,104,255,0.08);
  --card-radius: 22px;
}

/* ====== Base Reset ====== */
* { box-sizing: border-box; }

body{
  font-family: system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  text-align:center;
  margin:0;
  padding:40px 16px;
  min-height:100vh;
  background:
    radial-gradient(circle at top left, #e0f2ff 0, transparent 55%),
    radial-gradient(circle at bottom right, #ffe6f2 0, transparent 55%),
    #f5f5f7;
  color:#111;
}

h1,h2,h3{ margin:6px 0 10px; }
p{ margin:0 0 12px; color:#333; }
button{ font-family: inherit; cursor:pointer; }

/* ====== Views ====== */
.view{ display:none; }
.view.active{ display:block; }

/* ====== Header ====== */
.site-header{
  max-width:1000px;
  margin:0 auto 24px;
}
.site-header h1{
  font-size:36px;
  letter-spacing:.04em;
}
.site-header .sub{
  margin-top:6px;
  color:#555;
  font-weight:500;
  font-size:15px;
}

/* Tool header (default desktop layout) */
.tool-header{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  margin-bottom:8px;
  position:relative;
}
.tool-header .ghost{
  position:absolute;
  left:20px;
  background:transparent;
  border:none;
  font-size:14px;
  opacity:.8;
}
.tool-header .ghost:hover{ opacity:1; }
.tool-header .status{
  position:absolute;
  right:20px;
  display:flex;
  gap:6px;
  align-items:center;
}

/* Badges */
.badge{
  background:#eef1ff;
  color:#223;
  border-radius:999px;
  padding:4px 8px;
  font-size:12px;
  font-weight:700;
  white-space: nowrap;
}
.badge.warn{ background:#ffe9e6; color:#a33; }
.badge.timer{ background:#222; color:#fff; }

/* ====== Menu Cards (Top) ====== */
.menu-grid{
  max-width:1040px;
  margin:18px auto 0;
  padding:8px;
  display:grid;
  gap:18px;
  grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
}

.menu-card{
  position:relative;
  border:none;
  background:rgba(255,255,255,0.95);
  border-radius:var(--card-radius);
  box-shadow:0 18px 40px rgba(15,23,42,0.10);
  min-height:190px;
  transition:
    transform .15s ease-out,
    box-shadow .18s ease-out,
    border-color .15s ease-out,
    background .15s ease-out;
  text-align:left;
  border:1px solid rgba(15,23,42,0.04);
}

.menu-card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  border-top:4px solid var(--accent);
  opacity:.85;
  pointer-events:none;
}

.menu-card.disabled{
  opacity:.55;
  cursor:not-allowed;
  box-shadow:none;
  border-style:dashed;
}
.menu-card.disabled::before{ border-top-color:transparent; }
.menu-card:focus-visible{ outline:3px solid #7aa7ff; outline-offset:2px; }

.menu-card:hover:not(.disabled){
  transform: translateY(-4px) scale(1.01);
  box-shadow:0 24px 55px rgba(15,23,42,0.18);
  background-color:#ffffff;
}

.menu-card-body{
  padding:18px 20px 20px;
  display:flex;
  flex-direction:column;
  gap:8px;
}

.menu-card-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:999px;
  background:var(--accent-soft);
  font-size:100px;
}

  /* 文字がアイコンと被らないように下へ押す */
  .menu-card.has-bg .menu-card-body{
    padding-top: 118px;                 /* ←この数値で「文字の開始位置」調整 */
  }
  /* ===== B案：メニュー背景アイコン中央配置＆被り防止 ===== */
.menu-card.has-bg{
  background-repeat: no-repeat;
  background-size: 100px auto;      /* ← アイコンサイズ */
  background-position: center 10%; /* ← 上中央に固定 */
}

/* 文字をアイコンの下にずらす（←被り防止） */
.menu-card.has-bg .menu-card-body{
  padding-top: 90px;
}

  /* data-icon から背景画像を割り当て */
  .menu-card[data-icon="amino_puzzle"]{
    background-image: url("assets/ui/icons/amino_puzzle.png");
  }
  .menu-card[data-icon="classify"]{
    background-image: url("assets/ui/icons/classify.png");
  }
  .menu-card[data-icon="amino_name"]{
    background-image: url("assets/ui/icons/amino_name.png");
  }
  .menu-card[data-icon="venn"]{
    background-image: url("assets/ui/icons/venn.png");
  }
  .menu-card[data-icon="fischer"]{
    background-image: url("assets/ui/icons/fischer.png");
  }
  .menu-card[data-icon="fischer"]{
    background-image: url("assets/ui/icons/fischer.png");
  }
  
  /* ===== How to Use icon (emoji) ===== */
  .menu-card[data-icon="help"]{
    position: relative;
  }
  
  .menu-card[data-icon="help"]::after{
    content: "❓";
    position: absolute;
    left: 50%;
    top: 18px;
    transform: translateX(-50%);
    font-size: 72px;
    line-height: 1;
    opacity: 0.95;
    pointer-events: none;
  }
  
  .menu-card[data-icon="help"] .menu-card-body{
    padding-top: 90px;
  }
  
  @media (max-width: 640px){
    .menu-card[data-icon="help"]::after{
      top: 18px;
      font-size: 78px;
    }
    .menu-card[data-icon="help"] .menu-card-body{
      padding-top: 130px;
    }
  }
  
  /* スマホでは少し小さく＆余白も詰める */
  @media (max-width: 640px){
    .menu-card.has-bg{
      background-size: 120px auto;
      background-position: 16px 14px;
    }
    .menu-card.has-bg .menu-card-body{
      padding-top: 98px;
    }
  }
  
/* ====== Menu icon image size fix ====== */
.menu-card-icon img{
  width: 100px;
  height: 100px;
  object-fit: contain;
  display: block;
}

.menu-card-title{ font-weight:900; margin:4px 0 0; font-size:25px; }
.menu-card-desc{ color:#555; font-size:14px; }

/* ====== Mode Cards (Amino/Classify mode selection) ====== */
.mode-grid{
  max-width:920px;
  margin:18px auto;
  display:grid;
  gap:14px;
  grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
}
.mode-card{
  border:none;
  background:#fff;
  border-radius:14px;
  padding:18px 16px;
  text-align:left;
  box-shadow:0 2px 10px rgba(0,0,0,.06);
  transition: transform .1s ease, box-shadow .2s ease;
}
.mode-card:hover{
  transform: translateY(-1px);
  box-shadow:0 6px 18px rgba(0,0,0,.1);
}
.mode-card-title{ font-weight:800; font-size:18px; margin-bottom:6px; }
.mode-card-desc{ color:#555; }

/* ====== Panels / Chips / Buttons ====== */
.panel{
  max-width:720px;
  margin:16px auto;
  background:#fff;
  border-radius:12px;
  box-shadow:0 2px 10px rgba(0,0,0,.06);
  padding:16px;
}
.row{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:#f0f2f6;
  padding:8px 12px;
  border-radius:999px;
}

.primary{
  background: var(--accent);
  color:#fff;
  border:none;
  border-radius:8px;
  padding:8px 14px;
  font-weight:700;
}
.primary:hover{ filter:brightness(1.03); }

.secondary{
  background:#eceff5;
  color:#222;
  border:none;
  border-radius:8px;
  padding:8px 14px;
  font-weight:700;
}
.secondary:hover{ filter:brightness(1.02); }

.mini-note{ color:#666; font-size:12px; margin-top:8px; }

/* Instruction */
.instruction{
  max-width:600px;
  margin:0 auto 12px;
  line-height:1.4;
  white-space: normal;
}

/* Level bar */
.levelbar{
  width:min(600px,92vw);
  margin:0 auto 8px;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.levelbar button{
  padding:6px 12px;
  border:none;
  background:#f0f0f0;
  border-radius:6px;
  opacity:.85;
}
.levelbar button:hover{ opacity:1; }
.levelIndicator{ font-weight:700; }

/* ====== Stage / Base ====== */
.stage{
  position:relative;
  width:var(--stageSize);
  margin:10px auto 14px;
  background:transparent;
  overflow:visible;
}
.base{
  position:relative;
  width:100%;
  height:auto;
  display:block;
}

/* Dropzone */
.dropzone{
  position:absolute;
  width:var(--dropSize);
  height:var(--dropSize);
  left:calc(var(--dropLeft) + 50%);
  top:calc(var(--dropTop) + 0%);
  transform:translate(-50%,-50%);
  border-radius:50%;
  pointer-events:none;
}
.dropzone.hint::after{
  content:"";
  position:absolute;
  left:calc(50% + var(--hintCircleOffsetX));
  top:calc(50% + var(--hintCircleOffsetY));
  width:100%;
  height:100%;
  border-radius:50%;
  border:2px dashed #d00;
  background:rgba(255,0,0,.28);
  transform:translate(-50%,-50%);
  pointer-events:none;
}

/* ====== Tray ====== */
.tray{
  margin: 8px auto 8px;
  display:flex;
  flex-wrap:nowrap;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  justify-content:center;
  align-items:center;
  gap:14px;
  padding:4px 8px;
  max-width: 900px;
}
.choice{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:none;
  border-radius:12px;
  box-shadow:none;
  padding:4px;
}

/* Pieces */
.movable{
  width:auto;
  height:auto;
  object-fit:contain;
  cursor:grab;
  user-select:none;
  max-width:none;
  max-height:none;
}
.movable:not([style*="width"]){
  max-width:var(--partSize);
  max-height:var(--partSize);
}
.movable.dragging{ opacity:.65; cursor:grabbing; }

/* Placed */
.placed{
  position:absolute;
  transform:translate(-50%,-50%);
}
.placed.answer{ pointer-events:none; }

/* Messages */
.msg{
  min-height:1.5em;
  margin-top:8px;
  font-weight:600;
}

/* Hint container (解説・ボタン周り) */
.hint-container{
  width: min(900px, 92vw);
  margin: 8px auto 0;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  position:relative;
  z-index:10;
}
.hint-container .answer-explain{
  width:100%;
  max-width: min(900px, 92vw);
  text-align:left;
}
.hint-container button{
  padding:6px 12px;
  font-size:.9rem;
  border:none;
  background:#f0f0f0;
  border-radius:6px;
  opacity:.85;
}
.hint-container button:hover{ opacity:1; }

/* Answer explain */
.answer-explain{
  max-width:680px;
  margin:8px auto 0;
  text-align:left;
  line-height:1.6;
  font-size:14.5px;
}
.answer-explain p{ margin:0 0 6px; }
.answer-explain ul{ margin:6px 0 0 1.2em; padding:0; }
.answer-explain li{ margin:3px 0; }
.answer-explain strong{ font-weight:800; }

/* ====== Leaderboard ====== */
.leaderboard{
  max-width:720px;
  margin:10px auto 0;
  text-align:left;
}
.lb-row{
  display:grid;
  grid-template-columns: 56px 1fr 100px 140px;
  gap:8px;
  padding:8px 6px;
  border-bottom:1px solid #eee;
  align-items:center;
}
.lb-rank{ font-weight:800; text-align:center; }
.lb-name{ font-weight:700; }
.lb-score{ font-weight:800; text-align:right; }
.lb-meta{ color:#666; font-size:12px; text-align:right; }

/* ====== Fischer View ====== */
.fischer-view{
  background: transparent;
  box-shadow: none;
  padding-top: 0;
}
.fischer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  margin-bottom:6px;
}
.fischer-view img{
  max-height: var(--fischerMaxH);
  width:auto;
  height:auto;
  display:block;
  margin:0 auto 10px;
  mix-blend-mode: multiply;
  background: transparent;
}

/* Fischer-only mode: hide extra UI */
#aminoView.fischer-only #tray,
#aminoView.fischer-only #stage,
#aminoView.fischer-only #navBar,
#aminoView.fischer-only #message,
#aminoView.fischer-only #instruction{
  display:none !important;
}
#aminoView.fischer-only #controlBar > *:not(#fischerBtn){
  display:none !important;
}
#aminoView.fischer-only #fischerBtn{
  display:inline-flex !important;
}

/* ====== Utility ====== */
.hidden{ display: none !important; }

/* ====== Preview modal (legacy/optional) ====== */
.preview-backdrop{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  display:none;
  align-items:center;
  justify-content:center;
  z-index:9999;
}
.preview-backdrop.active{ display:flex; }
.preview-modal{
  background:#fff;
  border-radius:12px;
  box-shadow:0 8px 30px rgba(0,0,0,.25);
  width:min(92vw, 720px);
  max-height:84vh;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.preview-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  padding:10px 12px;
  border-bottom:1px solid #eee;
}
.preview-title{ font-weight:800; }
.preview-actions{ display:flex; gap:8px; }
.preview-actions button{
  padding:6px 10px;
  border:none;
  border-radius:8px;
  background:#eceff5;
  font-weight:700;
  cursor:pointer;
}
.preview-actions button:hover{ filter:brightness(1.02); }
.preview-body{
  padding:12px;
  overflow:auto;
  text-align:center;
  background:#fafbff;
}
.preview-body img{
  max-width:100%;
  height:auto;
  display:block;
  margin:0 auto;
  mix-blend-mode: multiply;
  background: transparent;
}

/* =========================================================
   CLASSIFICATION — Click mode (grid cards)
   ========================================================= */
#classifyGrid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap:12px;
  margin:20px 0;
  max-width:900px;
  margin-inline:auto;
}
.classify-card{
  background:#fff;
  border:2px solid #ccc;
  border-radius:10px;
  padding:6px;
  text-align:center;
  transition: all .2s;
  cursor:pointer;
  box-shadow:0 2px 6px rgba(0,0,0,0.05);
}
.classify-card img{
  max-width:100%;
  height:auto;
  border-radius:8px;
}
.classify-card:hover{ border-color:#0077cc; }
.classify-card.selected{ border-color:#0077cc; background:#e7f3ff; }
.classify-card.correct{ border-color:#22bb33; background:#eaffea; }
.classify-card.wrong{ border-color:#ff4444; background:#ffeaea; }
.classify-card.missed{ border-color:#ffaa00; background:#fff8e5; }

#classifyResult h3{ margin-top:0; }
#classifyResult .note{
  margin-top:8px;
  font-size:12px;
  color:#555;
  text-align:left;
}

/* Per-category explanation (after scoring) */
.classify-explain{
  margin-top:10px;
  padding:10px 12px;
  background:#f5f7ff;
  border:1px solid #e2e8ff;
  border-radius:10px;
}
.classify-explain h4{ margin:0 0 6px; font-size:1rem; }
.classify-explain ul{ margin-left:1.1em; }
.classify-explain li{ margin:4px 0; }

/* Kyte–Doolittle table */
.kd-table{
  width:100%;
  border-collapse:collapse;
  margin-top:8px;
  font-size:13px;
}
.kd-table th,
.kd-table td{
  border:1px solid #e5e7eb;
  padding:4px 6px;
  text-align:left;
}
.kd-table .kd-num{
  text-align:right;
  font-family: Menlo, Consolas, "Courier New", monospace;
}

/* =========================================================
   CLASSIFICATION — DnD mode (drop boxes + pool)
   ========================================================= */
#classifyView{ --gap: 12px; }

/* widen some containers for classify */
#classifyView .panel,
#classifyView .instruction,
.drop-area,
.card-pool,
#classifyGrid{
  max-width:1100px;
  margin-inline:auto;
}

/* Drop area */
.drop-area{
  display:flex;
  gap:var(--gap);
  justify-content:center;
  align-items:flex-start;
  flex-wrap:wrap;
  margin:12px auto 16px;
  max-width:1100px;
}
.drop-box{
  width:260px;
  min-height:260px;
  border:2px dashed #cbd5e1;
  border-radius:14px;
  background:#fff;
  padding:10px;
  transition:border-color .2s ease, background .2s ease;
}
.drop-title{
  margin:0 0 8px;
  font-weight:700;
}
.drop-slot{
  min-height:200px;
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  justify-content:center;
  align-items:flex-start;
}
.drop-box.ok{ border-color:#22c55e; background:#f1fff4; }
.drop-box.wrong{ border-color:#ef4444; background:#fff5f6; }
.drop-hint{ margin-top:6px; font-size:12px; color:#444; }

/* Pool */
.card-pool{
  display:grid;
  /* desktop baseline: many columns */
  grid-template-columns: repeat(10, 1fr);
  gap:10px;
  margin:10px auto 0;
  max-width:1100px;
}
.dnd-card{
  background:#f8fafc;
  border-radius:12px;
  padding:8px;
  box-shadow:0 1px 4px rgba(0,0,0,.08);
  user-select:none;
  cursor:grab;
}
.dnd-card.dragging{ opacity:.75; transform: scale(.98); }
.dnd-card img{
  display:block;
  width:100%;
  height:auto;
  object-fit:contain;
}
.dnd-card .tag{
  margin-top:4px;
  font-size:12px;
  font-weight:700;
  text-align:center;
  color:#333;
}
.dnd-card .tag-name{
  font-weight:800;
  font-size:12px;
}
.dnd-card .tag-code{
  font-weight:600;
  font-size:11px;
  opacity:.85;
}

/* ====== Classification Rule Card ====== */
.rules-card{
  margin:12px 0 16px;
  padding:12px 14px;
  border:1px solid #e5e7eb;
  border-radius:12px;
  background:#fafafa;
}
.rules-card h3{ margin:0 0 8px; font-size:1.08rem; }
.rules-card details{ border-top:1px dashed #e5e7eb; padding:8px 0; }
.rules-card details:first-of-type{ border-top:none; padding-top:0; }
.rules-card summary{ cursor:pointer; font-weight:700; }
.rules-card .explain-list{ margin-left:1em; }
.rules-card .explain-list li{ margin:4px 0; }
.rules-card .kd-mini{ font-size:12px; color:#555; line-height:1.5; }

.classify-rule-list{
  margin:6px 0 8px 1.2em;
  padding:0;
}
.classify-note{
  font-size:12px;
  color:#555;
  text-align:left;
}
.explain-list{ margin-left:1.2em; }
.explain-list li{ margin:3px 0; }

/* ====== Hide menus while playing (ONE PLACE ONLY) ====== */
#classifyView.playing #classifyMenu,
#classifyView.playing #classifyLevel,
#classifyView.playing #classifyRules,
#classifyView.playing #classifyAccordion{
  display:none !important;
}

/* =========================================================
   VENN DIAGRAM QUIZ
   ========================================================= */
text.answer{
  font-size:14px;
  font-weight:700;
  fill:#222;
}
text.answer.revealed{
  fill:#0b57d0; /* 正解で色変更 */
}

/* object 자체 transparent */
#vennObj{
  background: transparent;
}

/* Remove card around Venn, show bigger */
#vennView .venn-wrap{
  max-width:1100px;
  background:transparent;
  box-shadow:none;
  padding:0;
  overflow:visible;
}
#vennObj{
  width: min(1000px, 92vw);
  height:auto;
  display:block;
  margin:0 auto;
  background:transparent;
}

/* =========================================================
   Modal (structure preview)
   ========================================================= */
.modal.hidden{
  display:none !important;
  pointer-events:none !important;
}
.modal{
  position:fixed;
  inset:0;
  z-index:9999;
}
.modal-backdrop{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,0.45);
}
.modal-card{
  position:relative;
  max-width:920px;
  width:min(920px, calc(100% - 24px));
  margin:6vh auto;
  background: rgba(255,255,255,0.96);
  border-radius:16px;
  padding:14px 14px 16px;
  box-shadow:0 20px 60px rgba(0,0,0,0.25);
}
.modal-close{
  position:absolute;
  top:10px;
  right:12px;
  border:none;
  background:transparent;
  font-size:18px;
  cursor:pointer;
}
.modal-body{
  display:grid;
  grid-template-columns: 1.2fr 1fr;
  gap:14px;
  align-items:start;
}
.modal-body img{
  width:100%;
  height:auto;
  border-radius:12px;
  border:1px solid rgba(15,23,42,0.12);
  background:#fff;
}
.modal-text{
  font-size:14px;
  line-height:1.6;
}
@media (max-width: 760px){
  .modal-body{ grid-template-columns: 1fr; }
}

/* Modal image size */
#aminoModalImg{
  max-width:420px; /* 350〜450推奨 */
  width:100%;
  height:auto;
  margin:0 auto 12px;
  display:block;
}

/* =========================================================
   Responsive Header Fix (tool-header)
   ========================================================= */
@media (max-width: 900px){
  .tool-header{
    position:static;
    display:grid;
    grid-template-columns:1fr;
    gap:8px;
    justify-items:center;
    margin-bottom:10px;
  }
  .tool-header .ghost{
    position:static;
    justify-self:start;
    margin-left:4px;
    padding:8px 10px;
    border-radius:10px;
    background: rgba(255,255,255,0.75);
    border:1px solid rgba(15,23,42,0.10);
    font-size:14px;
  }
  .tool-header h2{
    margin:0;
    font-size:22px;
    line-height:1.15;
  }
  .tool-header .status{
    position:static;
    justify-self:center;
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:6px;
    margin-top:-2px;
  }
}

/* Smaller phone header */
@media (max-width: 480px){
  body{ padding:22px 12px; }
  .tool-header h2{ font-size:20px; }
  .tool-header .ghost{ font-size:13px; padding:7px 9px; }
}

/* =========================================================
   Responsive: Global / Menu / Buttons
   ========================================================= */
@media (max-width: 640px){
  body{ padding-top:24px; }
  .site-header h1{ font-size:26px; }
  .menu-grid{ gap:14px; }
}

@media (max-width: 900px){
  button, .primary, .secondary{
    min-height:44px;
    padding:10px 14px;
  }
  input, select, textarea{
    font-size:16px;
    min-height:44px;
  }
}

/* =========================================================
   Responsive: Stage sizing (phone / tablet)
   ========================================================= */
@media (max-width: 480px){
  :root{
    --stageSize: min(92vw, 360px);
    --partSize:  min(30vw, 120px);
    --dropSize:  68px;
  }
  .levelbar{ width: min(360px, 96vw); }
}

@media (min-width: 481px) and (max-width: 900px){
  :root{
    --stageSize: min(80vw, 520px);
    --partSize:  min(22vw, 140px);
  }
}

@media (hover: none) and (pointer: coarse) and (min-width: 768px){
  :root{
    --stageSize: 360px;
    --partSize: 130px;
    --dropSize: 76px;
    --fischerMaxH: 260px;
  }
}

/* =========================================================
   Responsive: Classification DnD (drop + pool)
   ========================================================= */
@media (max-width: 900px){
  .drop-area{ gap:10px; }
  .drop-box{
    width: min(92vw, 520px);
    min-width:0;
    min-height:160px;
    padding:10px;
  }
  .drop-slot{ min-height:120px; }

  .card-pool{
    grid-template-columns: repeat(2, 1fr);
    width: min(92vw, 560px);
    max-width: none;
  }
  .dnd-card{ width:auto; padding:6px; }
  .dnd-card img{ height:64px; }
  .dnd-card .tag{ font-size:11px; }
}

@media (min-width: 600px) and (max-width: 900px){
  .card-pool{ grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px){
  .card-pool{ grid-template-columns: repeat(2, 1fr); }
  .dnd-card img{ height:64px; }
}

/* =========================================================
   Mobile: Tray → 2x2 Grid (small phones)
   - スマホは横スクロールをやめてグリッドで見せる
   ========================================================= */
@media (max-width: 600px){
  #tray{
    display:grid;
    grid-template-columns: repeat(2, 1fr);
    gap:12px;
    overflow-x: visible;
    max-width:92vw;
    margin:8px auto;
    padding:4px;
  }
  .choice{ padding:6px; }
  .movable{
    max-width:100%;
    max-height:120px;
    margin:0 auto;
    display:block;
  }
}

/* =========================================================
   Touch behavior (Unified / NO DUPES) — FINAL
   ========================================================= */

/* ステージは基本スクロールOK（画面操作を阻害しない） */
#stage { touch-action: pan-x pan-y; }

/* tray：横スクロールやスワイプを殺さない（特にiOS対策） */
#tray  { touch-action: pan-x pan-y; }

/* まずPC側はネイティブdrag許可 */
@media (hover: hover) and (pointer: fine){
  .movable{ -webkit-user-drag: auto; }
}

/* タッチ端末のみ：長押しメニュー/選択などを抑止してJSドラッグを安定させる */
@media (hover: none) and (pointer: coarse){
  html, body{ max-width:100%; overflow-x:hidden; }

  #stage, .stage{
    width: min(var(--stageSize), 94vw);
    margin-left:auto;
    margin-right:auto;
  }

  #baseImage, .base{
    width:100%;
    height:auto;
    max-width:100%;
    display:block;
  }

  /* タッチではネイティブdragを切る */
  .movable{ -webkit-user-drag: none; }

  .movable, .dnd-card, .placed, #baseImage{
    -webkit-touch-callout:none;
    user-select:none;
  }

  /* ドラッグ対象だけgestureを切る */
  .movable, .dnd-card{
    touch-action:none;
  }
}
@media (max-width: 640px){
  .menu-card.has-bg{
    background-size: 130px auto;
    background-position: center 18px;
  }
  .menu-card.has-bg .menu-card-body{
    padding-top: 130px;
  }
}
/* ===== How to Use pages: make text readable ===== */
#howToPuzzle .panel,
#howToClassify .panel,
#howToNameMatch .panel,
#howToVenn .panel,
#howToFischer .panel{
  text-align:left;
}
#howToPuzzle ol, #howToClassify ol, #howToNameMatch ol, #howToVenn ol, #howToFischer ol{
  padding-left: 1.2em;
}
#howToPuzzle ul, #howToClassify ul, #howToNameMatch ul, #howToVenn ul, #howToFischer ul{
  padding-left: 1.2em;
}
/* ===== No piece (clickable choice) feedback ===== */
.choice .movable[data-noplace="1"]{
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform .08s ease, box-shadow .12s ease, filter .12s ease;
}

/* hover（PCでマウス乗せたとき） */
.choice .movable[data-noplace="1"]:hover{
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(0,0,0,.12);
  filter: brightness(1.03);
}

/* active（押してる最中） */
.choice .movable[data-noplace="1"]:active{
  transform: translateY(0px) scale(0.98);
  box-shadow: 0 4px 10px rgba(0,0,0,.10);
  filter: brightness(0.98);
}

/* キーボード操作でも分かるように（任意） */
.choice .movable[data-noplace="1"]:focus-visible{
  outline: 3px solid rgba(11,87,208,.35);
  outline-offset: 3px;
  border-radius: 12px;
}
/* ===== Choice pieces: hover / press feedback ===== */
.choice .movable{
  cursor: grab;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform .08s ease, box-shadow .12s ease, filter .12s ease;
}

.choice .movable:hover{
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(0,0,0,.12);
  filter: brightness(1.03);
}

.choice .movable:active{
  cursor: grabbing;
  transform: translateY(0px) scale(0.98);
  box-shadow: 0 4px 10px rgba(0,0,0,.10);
  filter: brightness(0.98);
}

.choice .movable.dragging{
  /* ドラッグ中は余計な動きを止める */
  transform: none !important;
  filter: none !important;
  box-shadow: none !important;
}