:root{
  --navy:#1e3a5f;--gold:#d4af37;--gold-l:#f0d060;
  --bg:#f0f4f9;--grid:#c8d4e8;--white:#fff;
  --red:#cc3333;--ok:#2d6a4f;
}
.area-transform-board-root *{box-sizing:border-box;margin:0;padding:0}

/* 修正: 画面下の空白対策。html/bodyを100%化し、ページ側の背景が
   見えないようにする（:has()はこのアプリが使われているページにのみ適用）。
   これまでvh固定値と何度も戦っていた空白問題は、ルート自体を
   position:fixed; inset:0 のフルスクリーンにすることで構造的に解消する
   （他アプリと共通のスケルトンに統一）。 */
html:has(.area-transform-board-root),
body:has(.area-transform-board-root){
  height:100%;margin:0;
}

.area-transform-board-root{
  position:fixed;inset:0;width:100%;height:100%;
  font-family:'BIZ UDGothic','Hiragino Kaku Gothic ProN','Meiryo',sans-serif;
  background:var(--bg);color:var(--navy);
  overflow:hidden;user-select:none;
  -webkit-user-select:none;touch-action:manipulation;
  z-index:9999;
}

/* ===== ヘッダー ===== */
.area-transform-board-root header{
  position:fixed;top:0;left:0;right:0;height:52px;
  background:var(--navy);color:#fff;
  display:flex;align-items:center;padding:0 16px;gap:12px;
  z-index:20;
}
.area-transform-board-root header h1{font-size:15px;font-weight:bold;white-space:nowrap}
#atb-header-msg{
  flex:1;font-size:13px;font-weight:bold;color:var(--navy);
  background:#fff;padding:6px 14px;border-radius:999px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-align:center;
}
/* 修正: 作業画面（図形の変形操作画面）ではヘッダーを非表示にし、
   その分の高さを方眼エリアに回す。in-work のときだけ適用。 */
.area-transform-board-root.in-work header{display:none}

/* ===== ギャラリー画面 ===== */
#atb-gallery-screen{
  position:fixed;top:52px;left:0;right:0;bottom:0;
  overflow-y:auto;padding:24px 20px;
}
.area-transform-board-root .gallery-title{font-size:14px;font-weight:bold;margin-bottom:14px;text-align:center}
.area-transform-board-root .gallery-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  max-width:860px;margin:0 auto;
}
@media(max-width:760px){.area-transform-board-root .gallery-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:420px){.area-transform-board-root .gallery-grid{grid-template-columns:1fr}}
.area-transform-board-root .shape-card{
  background:var(--white);border:2px solid var(--grid);border-radius:14px;
  padding:10px;cursor:pointer;text-align:center;
  transition:transform .12s,border-color .12s,box-shadow .12s;
  position:relative;
}
.area-transform-board-root .shape-card:hover{transform:translateY(-3px);border-color:var(--gold);box-shadow:0 6px 16px rgba(30,58,95,0.15)}
.area-transform-board-root .shape-card svg{width:100%;height:auto;border-radius:8px;background:#fff}
.area-transform-board-root .shape-card .card-label{font-size:14px;font-weight:bold;margin-top:6px}
/* 修正: 作業済み（一度でも編集した）図形カードを金枠で強調し、
   右上にチェックマークを表示して達成感が一目でわかるようにする */
.area-transform-board-root .shape-card.worked{border-color:var(--gold);box-shadow:0 0 0 1px var(--gold-l) inset}
.area-transform-board-root .shape-card .worked-badge{
  position:absolute;top:6px;right:6px;width:22px;height:22px;
  background:var(--gold);color:var(--navy);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:bold;box-shadow:0 2px 4px rgba(0,0,0,0.2);
}
/* 修正: ギャラリー画面の全リセットボタン */
.area-transform-board-root .gallery-reset-btn{
  display:block;margin:20px auto 4px;
  background:var(--navy);color:#fff;border:none;border-radius:999px;
  padding:8px 20px;font-size:12px;font-weight:bold;cursor:pointer;
  font-family:inherit;transition:background .12s;
}
.area-transform-board-root .gallery-reset-btn:hover{background:#16304d}

/* ===== 作業画面：フルスクリーンcanvas ===== */
#atb-work-screen{position:fixed;inset:0;display:none;overflow:hidden}
#atb-work-screen.show{display:flex}
.area-transform-board-root .canvas-wrap{
  flex:1;width:100%;height:100%;
  display:flex;align-items:center;justify-content:center;overflow:hidden;padding:12px;
}
#atb-main-svg{background:var(--white);border:2px solid var(--grid);border-radius:12px;display:block;box-shadow:0 8px 24px rgba(0,0,0,0.18);touch-action:none}

/* ===== 右下：ツールバーの縦積みコンテナ =====
   修正: 他アプリと同じ「右下に固定したツールバーを縦に積む」スケルトンへ統一。
   JSは #atb-btn-bar / #atb-slide-bar をまとめて表示・非表示するだけなので、
   このIDと表示切替(style.display / classList.show)の仕組みは変更していない。 */
#atb-btn-bar{
  position:fixed;right:16px;bottom:20px;z-index:10;
  display:flex;flex-direction:column;align-items:center;gap:16px;
}
.area-transform-board-root .atb-toolbar-group{
  display:flex;flex-direction:column;align-items:center;gap:12px;
}
.area-transform-board-root .bbtn{
  width:52px;height:52px;border-radius:999px;border:2px solid #dde4ef;
  font-size:20px;font-weight:bold;cursor:pointer;
  box-shadow:0 3px 8px rgba(0,0,0,0.25);
  display:flex;align-items:center;justify-content:center;
  transition:transform .1s;background:#ffffff;color:var(--navy);
  font-family:inherit;
}
.area-transform-board-root .bbtn:active:not(:disabled){transform:scale(0.92)}
.area-transform-board-root .bbtn:disabled{opacity:.35;cursor:default}
.area-transform-board-root .bbtn.mode-on{background:var(--gold);border-color:var(--gold);color:var(--navy)}

/* もどす／やりなおす（アンドゥ・リドゥ）のペアボタン（縦積み） */
.area-transform-board-root .atb-btn-pair{
  flex-direction:column;border-radius:999px;overflow:hidden;
  box-shadow:0 3px 8px rgba(0,0,0,0.25);gap:0;
}
.area-transform-board-root .atb-btn-pair button{
  width:52px;height:26px;border:none;background:#fff;color:var(--navy);
  font-size:14px;cursor:pointer;font-family:inherit;
}
.area-transform-board-root .atb-btn-pair button:first-child{border-bottom:1px solid #dde4ef}
.area-transform-board-root .atb-btn-pair button:disabled{opacity:.35;cursor:default}
.area-transform-board-root .atb-btn-pair button:active:not(:disabled){background:#eef2f6}

/* ===== スライドモードのツールバー ===== */
#atb-slide-bar{
  position:fixed;right:16px;bottom:20px;z-index:10;
  display:none;flex-direction:column;align-items:center;gap:12px;
}
#atb-slide-bar.show{display:flex}
#atb-slide-num{
  background:#fff;color:var(--navy);font-size:13px;font-weight:bold;
  padding:6px 14px;border-radius:999px;box-shadow:0 3px 8px rgba(0,0,0,0.2);
  white-space:nowrap;
}

#atb-mode-badge{
  position:fixed;top:64px;left:50%;transform:translateX(-50%);
  background:var(--navy);color:#fff;font-size:12px;font-weight:bold;
  padding:4px 14px;border-radius:20px;pointer-events:none;opacity:0;
  transition:opacity .2s;z-index:50;
}
#atb-mode-badge.show{opacity:1}
/* 修正: 作業画面はヘッダー非表示になる分、バッジ位置も詰める */
.area-transform-board-root.in-work #atb-mode-badge{top:12px}

.area-transform-board-root .gl{stroke:#dce6f2;stroke-width:.5}
.area-transform-board-root .glm{stroke:#b4c6dc;stroke-width:1}

@media(max-width:480px){
  .area-transform-board-root header h1{font-size:13px}
  .area-transform-board-root .bbtn{width:44px;height:44px;font-size:17px}
  .area-transform-board-root .atb-btn-pair button{width:44px;height:22px;font-size:12px}
  #atb-btn-bar,#atb-slide-bar{right:10px;bottom:14px;gap:10px}
}

/* JSONで確認したMaterial Symbolsへ統一 */
.area-transform-board-root .atb-tool-icon{width:24px;height:24px;display:block;flex-shrink:0;fill:currentColor;object-fit:contain}
.area-transform-board-root .bbtn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:3px;line-height:1}
.area-transform-board-root .atb-tool-label{font-size:8px;line-height:1.1;white-space:nowrap}
.area-transform-board-root .atb-btn-pair button{display:flex;align-items:center;justify-content:center;gap:2px;padding:0}
.area-transform-board-root .atb-btn-pair .atb-tool-icon{width:15px;height:15px}
.area-transform-board-root .atb-btn-pair .atb-tool-label{font-size:7px}

.area-transform-board-root .atb-gallery-heading{display:flex;align-items:center;justify-content:center;gap:18px;margin-bottom:14px}.area-transform-board-root .atb-gallery-heading .gallery-title{margin:0}



/* 移動・可変の道具BOX */
.area-transform-board-root #atb-btn-bar.atb-toolbox,
.area-transform-board-root #atb-slide-bar.atb-toolbox{position:fixed;right:16px;bottom:84px;width:244px;height:380px;max-width:calc(100vw - 16px);max-height:calc(100dvh - 64px);padding:0;gap:0;align-items:stretch;flex-direction:column;background:#f5f7fc;border:2px solid #c8d3e3;border-radius:16px;box-shadow:0 6px 24px #13274240;overflow:hidden;z-index:30;box-sizing:border-box;container-type:inline-size}
.area-transform-board-root .atb-toolbox-head{display:flex;flex-shrink:0;height:44px;background:var(--navy);color:white;align-items:center}
.area-transform-board-root .atb-toolbox-head button{border:0;background:transparent;color:white;height:44px;margin:0;padding:0 12px;font-family:inherit;font-size:16px;font-weight:bold;box-shadow:none;border-radius:0}
.area-transform-board-root .atb-toolbox-grip{flex:1;text-align:left;cursor:move;touch-action:none;user-select:none}
.area-transform-board-root .atb-toolbox-fold{width:40px;font-size:24px!important;cursor:pointer}
.area-transform-board-root .atb-toolbox-body{display:grid;grid-template-columns:repeat(auto-fit,minmax(94px,1fr));align-content:start;gap:8px;padding:10px 10px 24px;overflow:auto;min-height:0;flex:1}
.area-transform-board-root .atb-toolbox .atb-toolbar-group{display:contents;border-radius:0;box-shadow:none}
.area-transform-board-root .atb-toolbox-body button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:100%;height:68px;min-height:48px;margin:0;padding:6px;border:1px solid #d7dfeb;border-radius:12px;background:white;color:var(--navy);box-shadow:0 2px 4px #13274212;cursor:pointer;font-family:inherit}
.area-transform-board-root .atb-toolbox-body button.mode-on{background:var(--gold);border-color:var(--gold)}
.area-transform-board-root .atb-toolbox-body button:disabled{opacity:.35;cursor:default}
.area-transform-board-root .atb-toolbox-body .atb-tool-icon{width:26px;height:26px;flex-shrink:0}
.area-transform-board-root .atb-toolbox-body .atb-tool-label{font-size:13px;font-weight:bold;line-height:1.2;white-space:normal;text-align:center}
.area-transform-board-root .atb-toolbox-resize{position:absolute;right:0;bottom:0;width:26px;height:24px;border:0;background:#e4eaf4;color:var(--navy);font-size:20px;cursor:nwse-resize;touch-action:none;padding:0;margin:0}
.area-transform-board-root .atb-toolbox.atb-toolbox-compact .atb-toolbox-body{grid-template-columns:repeat(auto-fit,minmax(44px,1fr));padding:6px 6px 24px}
.area-transform-board-root .atb-toolbox.atb-toolbox-compact .atb-toolbox-body button{width:44px;height:44px;min-height:44px;border-radius:50%;justify-self:center;gap:0}
.area-transform-board-root .atb-toolbox.atb-toolbox-compact .atb-tool-label{display:none}
.area-transform-board-root .atb-toolbox.atb-toolbox-compact button:has(img[hidden]) .atb-tool-label{display:block;font-size:10px}
.area-transform-board-root #atb-btn-bar.atb-toolbox-closed,
.area-transform-board-root #atb-slide-bar.atb-toolbox-closed{height:44px!important;min-height:44px}
.area-transform-board-root .atb-toolbox-closed .atb-toolbox-body,
.area-transform-board-root .atb-toolbox-closed .atb-toolbox-resize{display:none}
.area-transform-board-root .atb-toolbox button:focus-visible{outline:3px solid #4d97ff;outline-offset:-3px}
.area-transform-board-root .atb-toolbox #atb-slide-num{grid-column:1/-1;text-align:center;color:var(--navy)}

.area-transform-board-root .atb-toolbox-layouts{display:flex;flex-shrink:0;gap:4px;padding:5px;background:#e7edf6}
.area-transform-board-root .atb-toolbox-layouts button{flex:1;min-width:0;height:32px;margin:0;padding:2px;border:1px solid #c7d2e3;border-radius:7px;background:white;color:var(--navy);font-family:inherit;font-size:12px;font-weight:bold;cursor:pointer}
.area-transform-board-root .atb-toolbox-layouts button[aria-pressed="true"]{background:var(--gold);border-color:var(--gold)}
.area-transform-board-root .atb-toolbox[data-layout] .atb-toolbox-body{grid-template-columns:repeat(var(--atb-tool-columns),minmax(0,1fr))}
.area-transform-board-root .atb-toolbox-closed .atb-toolbox-layouts{display:none}

/* 役割ごとの固定色。丸形・文字付きで共通。 */
.area-transform-board-root .atb-toolbox-body button{--tool-bg:#eef1f5;--tool-border:#cbd2dc;--tool-ink:#394657;--tool-active:#465568;background:var(--tool-bg);border-color:var(--tool-border);color:var(--tool-ink)}
.area-transform-board-root .atb-toolbox-body :is(#atb-btn-deform,#atb-btn-rotate,#atb-btn-flip,[onclick="atbExitSlideMode()"]){--tool-bg:#e0edff;--tool-border:#9abce9;--tool-ink:#184d91;--tool-active:#245fa8}
.area-transform-board-root .atb-toolbox-body #atb-btn-cut{--tool-bg:#ffead4;--tool-border:#e6b07a;--tool-ink:#8b420c;--tool-active:#a64c10}
.area-transform-board-root .atb-toolbox-body #atb-btn-copy{--tool-bg:#dcf2e5;--tool-border:#91c7a8;--tool-ink:#1d6342;--tool-active:#24734d}
.area-transform-board-root .atb-toolbox-body :is(#atb-btn-undo,#atb-btn-redo){--tool-bg:#ede4fb;--tool-border:#bda2df;--tool-ink:#654091;--tool-active:#7045a1}
.area-transform-board-root .atb-toolbox-body :is(#atb-btn-slides,[onclick="atbBackToGallery()"],[onclick="atbSlidePrev()"],[onclick="atbSlideNext()"],#atb-btn-play){--tool-bg:#e3eaf4;--tool-border:#9eafc7;--tool-ink:#1e3a5f;--tool-active:#1e3a5f}
.area-transform-board-root .atb-toolbox-body button:hover:not(:disabled){box-shadow:0 0 0 2px var(--tool-border)}
.area-transform-board-root .atb-toolbox-body button.mode-on{background:var(--tool-active);border-color:var(--tool-active);color:#fff;box-shadow:inset 0 0 0 2px #ffffff80}
.area-transform-board-root .atb-toolbox-body button.mode-on img.atb-tool-icon{filter:brightness(0) invert(1)}

.area-transform-board-root .atb-share-dialog{width:min(420px,90vw);border:0;border-radius:18px;padding:24px;color:#1e3a5f;text-align:center;box-shadow:0 12px 50px #0004}
.area-transform-board-root .atb-share-dialog::backdrop{background:#13274288}
.area-transform-board-root .atb-share-number{font-size:48px;font-weight:bold;letter-spacing:6px;user-select:all;padding:18px 0}
.area-transform-board-root .atb-share-dialog button{background:#1e3a5f;color:white;border:0;border-radius:12px;padding:10px 24px;font-size:16px}
.area-transform-board-root .atb-toolbox-body :is([onclick="atbSendShare()"],[onclick="atbReceiveShare()"]){--tool-bg:#d9f1f4;--tool-border:#83bcc6;--tool-ink:#205e68;--tool-active:#205e68}
.area-transform-board-root span.atb-tool-icon{font-size:26px;font-weight:bold;line-height:26px;text-align:center}

.area-transform-board-root .atb-toolbox-settings{width:40px;flex-shrink:0;display:flex;align-items:center;justify-content:center;padding:0!important;cursor:pointer}
.area-transform-board-root .atb-toolbox-settings svg{fill:currentColor}
.area-transform-board-root .atb-gallery-settings{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:6px;border:0;border-radius:10px;background:#fff;color:#1e3a5f;cursor:pointer}
.area-transform-board-root .atb-gallery-settings svg{fill:currentColor}
.area-transform-board-root .atb-share-dialog .atb-share-action{display:block;width:100%;margin:12px 0;background:#e0edf5;color:#1e3a5f;min-height:48px;font-weight:bold}
.area-transform-board-root .atb-share-dialog .atb-share-action:disabled{opacity:.4;cursor:default}

.area-transform-board-root .atb-room-dialog{max-height:90dvh;overflow:auto;width:min(640px,94vw)}
.area-transform-board-root .atb-pattern-pad{position:relative;width:240px;height:240px;margin:12px auto;user-select:none}
.area-transform-board-root .atb-pattern-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.area-transform-board-root .atb-share-dialog .atb-pattern-dot{position:absolute;transform:translate(-50%,-50%);width:48px;height:48px;min-height:48px;padding:0;margin:0;border:3px solid white;border-radius:50%;box-shadow:0 0 0 1px #d0d8e3;color:white;font-size:22px;font-weight:bold;touch-action:none}
.area-transform-board-root .atb-pattern-dot.selected{outline:3px solid #1e3a5f;outline-offset:2px}
.area-transform-board-root .atb-pattern-dot:focus-visible{outline:3px solid #d4af37;outline-offset:3px}
.area-transform-board-root .atb-pattern-dot:disabled{opacity:1}
.area-transform-board-root .atb-room-number{width:100%;padding:12px;font-size:24px;letter-spacing:3px;text-align:center;border:2px solid #c7d2e3;border-radius:10px;color:#1e3a5f}
.area-transform-board-root .atb-room-works{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0}
.area-transform-board-root .atb-room-work{border:1px solid #d0d8e3;border-radius:12px;padding:10px;min-width:0}
.area-transform-board-root .atb-room-work svg{width:100%;height:110px;background:#f3f6fb}
.area-transform-board-root .atb-room-work p{font-weight:bold;font-size:14px}
@media(max-width:450px){.area-transform-board-root .atb-room-works{grid-template-columns:1fr}}

/* WordPressテーマのdialog余白指定を上書きし、画面中央へ。 */
.area-transform-board-root dialog.atb-share-dialog[open]{position:fixed!important;inset:0!important;margin:auto!important;width:min(640px,calc(100vw - 32px))!important;max-width:calc(100vw - 32px)!important;height:fit-content!important;max-height:calc(100dvh - 64px)!important;padding:20px!important;box-sizing:border-box;overflow:auto;float:none!important;transform:none!important}
.area-transform-board-root .atb-room-code-label{font-size:15px;margin:8px 0 0;color:#526680}
.area-transform-board-root .atb-room-code{font-size:clamp(36px,8vw,60px)!important;font-weight:800!important;line-height:1.2!important;letter-spacing:.12em;margin:8px 0!important;padding:12px;background:#eef3fc;border-radius:12px;color:#12365f;user-select:all;font-variant-numeric:tabular-nums}
/* パステルカードによる参加認証と、役割別の共有画面 */
.area-transform-board-root dialog.atb-room-dialog[open]{width:min(920px,calc(100vw - 32px))!important}
.area-transform-board-root .atb-card-auth{margin:14px 0}
.area-transform-board-root .atb-card-sequence{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;max-width:520px;margin:0 auto 20px}
.area-transform-board-root .atb-card-choices{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:8px}
.area-transform-board-root .atb-share-dialog .atb-pin-card{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;min-width:0;min-height:94px;margin:0;padding:12px 3px;border:2px solid transparent;border-radius:12px;color:#1e3a5f;font-family:inherit;box-shadow:0 2px 5px #1e3a5f15;cursor:pointer;touch-action:manipulation}
.area-transform-board-root .atb-pin-card.selected{border-color:#1e3a5f;box-shadow:0 0 0 2px #1e3a5f20}
.area-transform-board-root .atb-pin-card:focus-visible{outline:3px solid #275bc3;outline-offset:2px}
.area-transform-board-root .atb-pin-mark{font-size:30px;line-height:1.2}
.area-transform-board-root .atb-pin-name{font-size:12px;font-weight:bold;line-height:1.2;white-space:nowrap}
.area-transform-board-root .atb-pin-order{position:absolute;right:5px;top:4px;border-radius:50%;background:#1e3a5f;color:#fff;width:23px;height:23px;line-height:23px;font-size:14px;font-weight:bold}
.area-transform-board-root .atb-card-sequence .atb-pin-card{min-height:110px;cursor:default}
.area-transform-board-root .atb-pin-empty{background:#f2f5fa;border:2px dashed #c6d2e2!important;color:#7b8ba2!important;font-size:26px}
.area-transform-board-root .atb-role-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:18px 0}
.area-transform-board-root .atb-share-dialog .atb-role-card{display:flex;flex-direction:column;justify-content:center;gap:14px;min-height:155px;margin:0;padding:20px;border:2px solid #bdcee8;border-radius:16px;background:#eaf2ff;color:#1e3a5f;font-size:22px;font-weight:bold;text-align:left}
.area-transform-board-root .atb-role-card:nth-child(2){background:#edf6ee;border-color:#b8d3be}
.area-transform-board-root .atb-role-description{font-size:14px;font-weight:normal;line-height:1.6}
.area-transform-board-root .atb-participation-card{border:1px solid #c8d5e7;border-radius:14px;background:#f6f9fe;padding:14px;margin-bottom:16px}
.area-transform-board-root .atb-participation-card summary,.area-transform-board-root .atb-room-more summary{cursor:pointer;font-weight:bold;text-align:left;padding:8px;color:#1e3a5f}
.area-transform-board-root .atb-room-hint{font-size:14px;color:#526680;margin:10px 0}
.area-transform-board-root .atb-room-controls{display:flex;gap:12px;margin:12px 0}
.area-transform-board-root .atb-room-controls .atb-share-action{margin:0;flex:1}
.area-transform-board-root .atb-share-dialog .atb-accepting{background:#dceee1;color:#205b3b}
.area-transform-board-root .atb-share-dialog .atb-stopped{background:#f6e7d2;color:#805318}
.area-transform-board-root .atb-room-more{background:#f3f5f8;border-radius:12px;margin:16px 0;padding:8px 12px}
.area-transform-board-root .atb-share-dialog .atb-danger{background:#fbe7e8;color:#9b2639;border:1px solid #e7b4ba}
.area-transform-board-root .atb-share-dialog .atb-work-open{display:flex;flex-direction:column;gap:8px;margin:0;background:#fff;border:0;padding:0;color:#1e3a5f;overflow:hidden}
.area-transform-board-root .atb-work-open svg{height:155px;border-radius:10px}
.area-transform-board-root .atb-work-public{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px;font-size:14px;font-weight:bold;cursor:pointer}
.area-transform-board-root .atb-work-public input{width:22px;height:22px;accent-color:#277854}
.area-transform-board-root .atb-room-empty{grid-column:1/-1;background:#f4f7fc;border-radius:12px;padding:20px;color:#526680}
@media(max-width:700px){.area-transform-board-root .atb-card-choices{grid-template-columns:repeat(3,minmax(0,1fr))}.area-transform-board-root .atb-share-dialog .atb-pin-card{min-height:76px}.area-transform-board-root .atb-card-sequence{gap:8px}.area-transform-board-root .atb-card-sequence .atb-pin-card{min-height:84px}.area-transform-board-root .atb-role-cards{grid-template-columns:1fr}.area-transform-board-root .atb-share-dialog .atb-role-card{min-height:120px}}

/* 5記号・4回入力。同じ記号を繰り返して入力できる。 */
.area-transform-board-root .atb-card-choices{grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;max-width:620px;margin:auto}
.area-transform-board-root .atb-pin-card svg.atb-pin-mark{display:block;width:40px;height:40px;fill:currentColor;flex-shrink:0}
@media(max-width:700px){.area-transform-board-root .atb-card-choices{grid-template-columns:repeat(5,minmax(0,1fr));gap:5px}.area-transform-board-root .atb-card-choices .atb-pin-card{padding:10px 1px;min-height:80px}.area-transform-board-root .atb-pin-name{font-size:11px}.area-transform-board-root .atb-pin-card svg.atb-pin-mark{width:32px;height:32px}}

/* 下部の操作は内容に合った幅で横並び。 */
.area-transform-board-root .atb-room-footer{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px;margin:20px 0 4px}
.area-transform-board-root .atb-room-footer .atb-share-action,
.area-transform-board-root .atb-share-dialog>.atb-close-action{display:inline-flex;align-items:center;justify-content:center;width:auto;min-width:130px;min-height:46px;padding:10px 22px;margin:0}
.area-transform-board-root .atb-share-dialog .atb-primary-action{background:#1e3a5f;color:#fff}
.area-transform-board-root .atb-share-dialog .atb-close-action{background:#eef1f5;color:#43546b}
.area-transform-board-root .atb-share-dialog>.atb-close-action{margin-top:16px}
@media(min-width:701px){.area-transform-board-root .atb-room-more .atb-share-action{display:inline-flex;align-items:center;justify-content:center;width:auto;max-width:100%;margin:8px 8px 4px 0;padding:10px 18px}}
@media(max-width:480px){.area-transform-board-root .atb-room-footer{gap:8px}.area-transform-board-root .atb-room-footer .atb-share-action{min-width:100px;padding:10px 14px}}

/* 役割の入口：短い文言に合わせたカードと文字の大きさ。 */
.area-transform-board-root dialog.atb-role-dialog[open]{width:min(420px,calc(100vw - 32px))!important;padding:24px!important}
.area-transform-board-root .atb-role-dialog h2{font-size:24px!important;line-height:1.4!important;margin:0 0 20px!important;padding:0!important;font-weight:700!important}
.area-transform-board-root .atb-role-dialog .atb-role-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:0 0 8px}
.area-transform-board-root .atb-role-dialog .atb-role-card{align-items:center;justify-content:center;text-align:center;min-height:104px;padding:18px 12px;font-size:26px;line-height:1.4;gap:8px;box-sizing:border-box}
.area-transform-board-root .atb-role-dialog .atb-role-description{font-size:14px;line-height:1.5}
.area-transform-board-root .atb-role-dialog>.atb-close-action{min-width:120px;min-height:44px;font-size:16px;line-height:1.5;padding:10px 20px;margin-top:16px}
@media(max-width:480px){
 .area-transform-board-root dialog.atb-role-dialog[open]{padding:20px 16px!important}
 .area-transform-board-root .atb-role-dialog h2{font-size:22px!important;margin-bottom:16px!important}
 .area-transform-board-root .atb-role-dialog .atb-role-cards{gap:12px}
 .area-transform-board-root .atb-role-dialog .atb-role-card{min-height:90px;font-size:24px;padding:14px 8px}
}

/* 児童の送信を主操作にし、先生の入口は右上へ。 */
.area-transform-board-root .atb-role-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}
.area-transform-board-root .atb-role-header h2{flex:1;text-align:left;margin:0!important;min-width:0}
.area-transform-board-root .atb-role-dialog .atb-teacher-action{display:inline-flex;align-items:center;justify-content:center;flex:none;width:auto;min-width:64px;min-height:44px;padding:8px 14px;margin:0;background:#edf6ee;color:#1e3a5f;border:1px solid #b8d3be;border-radius:10px;font-size:16px;line-height:1.4}
.area-transform-board-root .atb-role-dialog .atb-role-cards{grid-template-columns:minmax(0,300px);justify-content:center}
.area-transform-board-root .atb-role-dialog .atb-role-cards:empty{display:none}
@media(max-width:480px){.area-transform-board-root .atb-role-header{gap:10px;margin-bottom:16px}.area-transform-board-root .atb-role-header h2{font-size:20px!important}.area-transform-board-root .atb-role-dialog .atb-role-card{font-size:24px}}

/* 移動・可変の道具BOX */
.vtb-host .atb-toolbox{display:flex;position:fixed;right:16px;bottom:84px;width:244px;height:380px;max-width:calc(100vw - 16px);max-height:calc(100dvh - 64px);padding:0;gap:0;align-items:stretch;flex-direction:column;background:#f5f7fc;border:2px solid #c8d3e3;border-radius:16px;box-shadow:0 6px 24px #13274240;overflow:hidden;z-index:30;box-sizing:border-box;container-type:inline-size}
.vtb-host .atb-toolbox-head{display:flex;flex-shrink:0;height:44px;background:var(--navy,#1e3a5f);color:white;align-items:center}
.vtb-host .atb-toolbox-head button{border:0;background:transparent;color:white;height:44px;margin:0;padding:0 12px;font-family:inherit;font-size:16px;font-weight:bold;box-shadow:none;border-radius:0}
.vtb-host .atb-toolbox-grip{flex:1;text-align:left;cursor:move;touch-action:none;user-select:none}
.vtb-host .atb-toolbox-fold{width:40px;font-size:24px!important;cursor:pointer}
.vtb-host .atb-toolbox-body{display:grid;grid-template-columns:repeat(auto-fit,minmax(94px,1fr));align-content:start;gap:8px;padding:10px 10px 24px;overflow:auto;min-height:0;flex:1}
.vtb-host .atb-toolbox .atb-toolbar-group{display:contents;border-radius:0;box-shadow:none}
.vtb-host .atb-toolbox-body button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:100%;height:68px;min-height:48px;margin:0;padding:6px;border:1px solid #d7dfeb;border-radius:12px;background:white;color:var(--navy,#1e3a5f);box-shadow:0 2px 4px #13274212;cursor:pointer;font-family:inherit}
.vtb-host .atb-toolbox-body button.mode-on{background:var(--gold,#d4af37);border-color:var(--gold,#d4af37)}
.vtb-host .atb-toolbox-body button:disabled{opacity:.35;cursor:default}
.vtb-host .atb-toolbox-body .atb-tool-icon{width:26px;height:26px;flex-shrink:0}
.vtb-host .atb-toolbox-body .atb-tool-label{font-size:13px;font-weight:bold;line-height:1.2;white-space:normal;text-align:center}
.vtb-host .atb-toolbox-resize{position:absolute;right:0;bottom:0;width:26px;height:24px;border:0;background:#e4eaf4;color:var(--navy,#1e3a5f);font-size:20px;cursor:nwse-resize;touch-action:none;padding:0;margin:0}
.vtb-host .atb-toolbox.atb-toolbox-compact .atb-toolbox-body{grid-template-columns:repeat(auto-fit,minmax(44px,1fr));padding:6px 6px 24px}
.vtb-host .atb-toolbox.atb-toolbox-compact .atb-toolbox-body button{width:44px;height:44px;min-height:44px;border-radius:50%;justify-self:center;gap:0}
.vtb-host .atb-toolbox.atb-toolbox-compact .atb-tool-label{display:none}
.vtb-host .atb-toolbox.atb-toolbox-compact button:has(img[hidden]) .atb-tool-label{display:block;font-size:10px}
.vtb-host .atb-toolbox-closed{height:44px!important;min-height:44px}
.vtb-host .atb-toolbox-closed .atb-toolbox-body,
.vtb-host .atb-toolbox-closed .atb-toolbox-resize{display:none}
.vtb-host .atb-toolbox button:focus-visible{outline:3px solid #4d97ff;outline-offset:-3px}
.vtb-host .atb-toolbox #atb-slide-num{grid-column:1/-1;text-align:center;color:var(--navy,#1e3a5f)}

.vtb-host .atb-toolbox-layouts{display:flex;flex-shrink:0;gap:4px;padding:5px;background:#e7edf6}
.vtb-host .atb-toolbox-layouts button{flex:1;min-width:0;height:32px;margin:0;padding:2px;border:1px solid #c7d2e3;border-radius:7px;background:white;color:var(--navy,#1e3a5f);font-family:inherit;font-size:12px;font-weight:bold;cursor:pointer}
.vtb-host .atb-toolbox-layouts button[aria-pressed="true"]{background:var(--gold,#d4af37);border-color:var(--gold,#d4af37)}
.vtb-host .atb-toolbox[data-layout] .atb-toolbox-body{grid-template-columns:repeat(var(--atb-tool-columns),minmax(0,1fr))}
.vtb-host .atb-toolbox-closed .atb-toolbox-layouts{display:none}

/* 役割ごとの固定色。丸形・文字付きで共通。 */
.vtb-host .atb-toolbox-body button{--tool-bg:#eef1f5;--tool-border:#cbd2dc;--tool-ink:#394657;--tool-active:#465568;background:var(--tool-bg);border-color:var(--tool-border);color:var(--tool-ink)}
.vtb-host .atb-toolbox-body button[data-color="blue"]{--tool-bg:#e0edff;--tool-border:#9abce9;--tool-ink:#184d91;--tool-active:#245fa8}
.vtb-host .atb-toolbox-body button[data-color="orange"]{--tool-bg:#ffead4;--tool-border:#e6b07a;--tool-ink:#8b420c;--tool-active:#a64c10}
.vtb-host .atb-toolbox-body button[data-color="green"]{--tool-bg:#dcf2e5;--tool-border:#91c7a8;--tool-ink:#1d6342;--tool-active:#24734d}
.vtb-host .atb-toolbox-body button[data-color="purple"]{--tool-bg:#ede4fb;--tool-border:#bda2df;--tool-ink:#654091;--tool-active:#7045a1}
.vtb-host .atb-toolbox-body button[data-color="navy"]{--tool-bg:#e3eaf4;--tool-border:#9eafc7;--tool-ink:#1e3a5f;--tool-active:#1e3a5f}
.vtb-host .atb-toolbox-body button:hover:not(:disabled){box-shadow:0 0 0 2px var(--tool-border)}
.vtb-host .atb-toolbox-body button.mode-on{background:var(--tool-active);border-color:var(--tool-active);color:#fff;box-shadow:inset 0 0 0 2px #ffffff80}
.vtb-host .atb-toolbox-body button.mode-on img.atb-tool-icon{filter:brightness(0) invert(1)}


.vtb-host .atb-tool-icon{width:26px;height:26px;display:block;fill:currentColor}.vtb-host .atb-toolbox-settings svg{fill:currentColor}

.vtb-host .atb-toolbox{z-index:1000;display:flex}
.vtb-host .atb-toolbox [hidden]{display:none!important}
.vtb-host .atb-toolbox-grip{font-size:15px!important;line-height:1.2!important;min-width:0;white-space:normal}
.vtb-host .atb-toolbox-body>label,.vtb-host .atb-toolbox-body>select,.vtb-host .atb-toolbox-body>.tool-options,.vtb-host .atb-toolbox-body>.tool-info{grid-column:1/-1;min-width:0;margin:0;padding:6px;position:static;transform:none;background:transparent;box-shadow:none}
.vtb-host .atb-toolbox-body label{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:14px;color:#1e3a5f}
.vtb-host .atb-toolbox-body select{min-width:0;max-width:100%;width:100%;height:44px;background:white;color:#1e3a5f;border:1px solid #c7d2e3;border-radius:8px;font-size:14px}
.vtb-host .atb-toolbox-body .tool-options{display:flex;flex-direction:column;gap:8px}
.vtb-host .atb-toolbox-body :is(.atb-toolbar-group,.piece-tools,nav){display:contents;position:static;transform:none;padding:0;background:none;box-shadow:none}
.vtb-host .atb-toolbox-body button{border-radius:12px!important;font-size:14px;line-height:1.3!important}
.vtb-host .atb-toolbox-body img.atb-tool-icon,.vtb-host .atb-toolbox-body svg.atb-tool-icon{width:26px!important;height:26px!important;fill:currentColor;stroke:none;touch-action:auto}
.vtb-host .atb-toolbox-head svg{width:24px!important;height:24px!important;fill:currentColor}
.vtb-host .atb-toolbox-compact .atb-toolbox-body button{border-radius:50%!important}
.vtb-host .atb-toolbox-body :is(.tool-info,[data-role=status]){font-size:13px;text-align:center;color:#1e3a5f}
.vtb-host .atb-toolbox-body [aria-pressed=true]{background:var(--tool-active,#245fa8);color:white}
@media print{.vtb-host .atb-toolbox{display:none!important}}

.area-transform-board-root.in-work .atb-gallery-toolbox{display:none!important}
.area-transform-board-root:not(.in-work) #atb-gallery-screen{height:100%;flex:1}
.area-transform-board-root .atb-toolbox-head .atb-toolbox-grip{font-size:14px!important}

.area-transform-board-root #atb-gallery-screen{top:0}
/* 共有一覧：操作を短くまとめ、作品領域を優先 */
.area-transform-board-root .atb-works-toolbar{flex-wrap:wrap;align-items:center;gap:8px;position:sticky;top:-24px;background:#fff;padding:10px 0;z-index:2;border-bottom:1px solid #dce4f0}
.area-transform-board-root .atb-works-toolbar>.atb-share-action{flex:0 1 auto;width:auto;min-height:44px;padding:10px 14px}
.area-transform-board-root .atb-public-state{margin:0 auto 0 0;font-size:15px;font-weight:700}
.area-transform-board-root .atb-works-toolbar .atb-room-more{margin:0;position:relative}
.area-transform-board-root .atb-works-toolbar .atb-room-more[open]{position:absolute;right:0;top:0;max-width:min(420px,calc(100vw - 60px));max-height:65dvh;overflow:auto;box-shadow:0 8px 28px #1e3a5f44;z-index:3;background:white;border:1px solid #d1dceb}
.area-transform-board-root .atb-works-toolbar .atb-room-more .atb-room-controls{flex-wrap:wrap}
.area-transform-board-root .atb-room-more button[aria-pressed=true]{background:#dcefe6;border:2px solid #438369}
.area-transform-board-root .atb-work-mark{display:inline-block;padding:3px 8px;border-radius:7px;background:#eef2f7;color:#334155;font-size:13px;margin:4px}
.area-transform-board-root .atb-work-updated{background:#fff0c2;color:#805b00;font-weight:700}
.area-transform-board-root .atb-room-work.atb-work-seen{border-color:#71ae96}
.area-transform-board-root .atb-room-detail{margin:16px 0}
.area-transform-board-root .atb-readonly-stage .atb-work-art{width:100%;height:auto;max-height:55dvh;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;pointer-events:none}
.area-transform-board-root .atb-room-detail .atb-room-controls{flex-wrap:wrap}
.area-transform-board-root .atb-works-message:empty{display:none}
@media(max-width:600px){.area-transform-board-root .atb-works-toolbar{top:-16px}.area-transform-board-root .atb-public-state{width:100%;text-align:left}.area-transform-board-root .atb-works-toolbar>.atb-share-action{font-size:14px;padding:9px 10px}}

/* 1.7.1: 共有入口のタイトルと操作ボタンを分離 */
.area-transform-board-root .atb-role-dialog .atb-role-header{display:block;margin-bottom:18px}
.area-transform-board-root .atb-role-dialog .atb-role-header h2{width:100%;font-size:24px!important;line-height:1.4!important;word-break:normal;overflow-wrap:normal;text-align:left}
.area-transform-board-root .atb-role-header-actions{display:flex;justify-content:flex-end;gap:8px;flex-wrap:wrap;margin-top:12px}
.area-transform-board-root .atb-role-dialog .atb-role-header-actions .atb-share-action{display:inline-flex;width:auto;flex:0 1 auto;min-height:44px;margin:0;padding:10px 14px;font-size:16px;line-height:1.4}
.area-transform-board-root .atb-role-dialog .atb-role-cards{grid-template-columns:minmax(0,1fr);width:100%;gap:12px;margin:0}
.area-transform-board-root .atb-role-dialog .atb-role-card{width:100%;min-height:84px;font-size:22px;padding:16px;gap:6px}
.area-transform-board-root .atb-role-dialog .atb-role-description{font-size:14px}
/* 先生の一覧操作は同じ高さ・同じ文字サイズ */
.area-transform-board-root .atb-works-toolbar{align-items:center}
.area-transform-board-root .atb-works-toolbar>.atb-share-action,.area-transform-board-root .atb-works-toolbar>.atb-room-more>summary{display:inline-flex;align-items:center;justify-content:center;box-sizing:border-box;min-height:48px;height:48px;min-width:80px;width:auto;margin:0;padding:10px 16px;font-size:16px;line-height:1.4;border:1px solid #d0dceb;border-radius:10px;white-space:nowrap}
.area-transform-board-root .atb-works-toolbar>.atb-room-more{padding:0;border-radius:10px;flex:none}
.area-transform-board-root .atb-works-toolbar>.atb-room-more>summary{list-style:none;background:#f3f5f8;cursor:pointer}
.area-transform-board-root .atb-works-toolbar>.atb-room-more>summary::-webkit-details-marker{display:none}
.area-transform-board-root .atb-works-toolbar>.atb-room-more[open]{padding:12px}
.area-transform-board-root .atb-works-toolbar .atb-room-more .atb-share-action{min-height:44px;font-size:16px;line-height:1.4;margin:6px 4px;padding:10px 14px}
.area-transform-board-root .atb-room-info-dialog .atb-room-footer .atb-share-action{font-size:16px;min-height:48px}
@media(max-width:600px){.area-transform-board-root .atb-works-toolbar>.atb-share-action,.area-transform-board-root .atb-works-toolbar>.atb-room-more>summary{min-height:44px;height:44px;font-size:14px;min-width:72px;padding:8px 12px}.area-transform-board-root .atb-role-dialog .atb-role-header h2{font-size:22px!important}}

/* 1.7.2: 提出一覧でルーム番号と参加カードを常時確認 */
.area-transform-board-root .atb-works-toolbar .atb-room-compact{display:flex;align-items:center;flex-wrap:wrap;gap:10px;flex:0 0 100%;min-width:0;margin:0 0 4px;padding:6px 0}
.area-transform-board-root .atb-room-compact .atb-room-compact-code{margin:0;font-size:16px;font-weight:700;line-height:1.4;white-space:nowrap;font-variant-numeric:tabular-nums}
.area-transform-board-root .atb-room-compact .atb-card-auth{margin:0}
.area-transform-board-root .atb-room-compact .atb-card-sequence{grid-template-columns:repeat(4,34px);gap:5px;max-width:none;margin:0}
.area-transform-board-root .atb-room-compact .atb-card-sequence .atb-pin-card{width:34px;height:34px;min-height:34px;padding:4px;gap:0;border-radius:7px;box-sizing:border-box;box-shadow:none}
.area-transform-board-root .atb-room-compact .atb-pin-card svg.atb-pin-mark{width:23px;height:23px}
.area-transform-board-root .atb-room-compact .atb-pin-name{display:none}
.area-transform-board-root .atb-room-compact .atb-pin-order{width:13px;height:13px;font-size:9px;line-height:13px;right:0;top:0}
@media(max-width:400px){.area-transform-board-root .atb-works-toolbar .atb-room-compact{gap:6px}.area-transform-board-root .atb-room-compact .atb-room-compact-code{font-size:14px}.area-transform-board-root .atb-room-compact .atb-card-sequence{grid-template-columns:repeat(4,30px);gap:4px}.area-transform-board-root .atb-room-compact .atb-card-sequence .atb-pin-card{width:30px;height:30px;min-height:30px}}

/* 1.8.0: 通常の道具箱を提出一覧内で共有操作に使う */
.area-transform-board-root dialog.atb-has-shared-toolbox[open]{width:min(1000px,calc(100vw - 416px))!important;max-width:min(1000px,calc(100vw - 32px))!important;margin-left:auto!important;margin-right:auto!important;padding:20px!important;box-sizing:border-box}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox{position:fixed!important;z-index:20;box-sizing:border-box;display:flex;flex-direction:column;overflow:hidden;text-align:left}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-head{height:44px;min-height:44px;flex-shrink:0;background:#1e3a5f}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-head button{background:transparent;color:white;border:0;border-radius:0;margin:0;height:44px;min-height:44px;width:auto;padding:0 10px;font-size:16px;line-height:1.4;box-shadow:none}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-head .atb-toolbox-grip{flex:1;min-width:0;text-align:left}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-settings[hidden]{display:none!important}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-body>.atb-share-action{width:100%;min-width:0;height:68px;min-height:48px;margin:0;padding:6px;font-size:14px;line-height:1.4;white-space:normal;background:#e8eef8;border:1px solid #c5d4e9;border-radius:12px}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-body>.atb-share-action.mode-on{background:#f9e6a2;border-color:#d1ab34;color:#594300!important}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox.atb-toolbox-compact .atb-toolbox-body>.atb-share-action{width:100%;height:auto;min-height:52px;border-radius:10px;font-size:12px}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox.atb-toolbox-closed{height:44px!important;min-height:44px!important}
@media(max-width:900px){.area-transform-board-root dialog.atb-has-shared-toolbox[open]{width:calc(100vw - 32px)!important;max-width:840px!important;margin-left:auto!important;margin-right:auto!important;padding:16px 16px 280px!important;max-height:calc(100dvh - 24px)!important}.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-body>.atb-share-action{height:54px;font-size:13px}}

/* Teacher actions: frequent controls and a separate room menu. */
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-toolbox-body>.atb-tool-wide{grid-column:1 / -1;height:52px}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox button[aria-checked="true"]{background:#d5eee3!important;border-color:#70ae91!important;color:#174e36!important}
.area-transform-board-root .atb-works-toolbar>.atb-works-message{margin:0 auto 0 0;font-weight:700}
.area-transform-board-root .atb-public-state[hidden]{display:none!important}
.area-transform-board-root .atb-room-management{position:fixed;inset:auto;margin:0;padding:10px;box-sizing:border-box;max-height:calc(100dvh - 32px);overflow:auto;border:1px solid #c5d4e9;border-radius:14px;background:#fff;box-shadow:0 8px 28px #14284040}
.area-transform-board-root .atb-room-management:popover-open{display:grid;gap:8px}
.area-transform-board-root .atb-room-management>.atb-share-action{width:100%;min-height:44px;margin:0;font-size:14px}
.area-transform-board-root .atb-room-management>.atb-room-danger{color:#a32626!important;background:#fff0f0;border-color:#e5aaaa}

/* Room number and entry cards below the submission toolbox layout controls. */
.area-transform-board-root .atb-shared-toolbox .atb-toolbox-body>.atb-room-compact{grid-column:1 / -1;display:flex;flex-direction:column;align-items:center;gap:8px;min-width:0;margin:0;padding:4px 0 10px;border-bottom:1px solid #d5deeb}
.area-transform-board-root .atb-shared-toolbox .atb-room-compact .atb-room-compact-code{font-size:15px;text-align:center}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox.atb-toolbox-closed .atb-toolbox-body{display:none}

/* Compact room information: unnumbered cards and an enlargement shortcut. */
.area-transform-board-root .atb-shared-toolbox .atb-room-compact{position:relative}
.area-transform-board-root .atb-shared-toolbox .atb-room-compact .atb-pin-order{display:none!important}
.area-transform-board-root .atb-shared-toolbox .atb-room-compact .atb-room-compact-code{padding:0 42px;white-space:normal;overflow-wrap:anywhere}
.area-transform-board-root .atb-share-dialog .atb-shared-toolbox .atb-room-compact>.atb-room-expand{position:absolute;right:0;top:0;width:38px;height:30px;min-height:30px;margin:0;padding:2px;font-size:12px;border-radius:7px}
.area-transform-board-root .atb-works-header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:14px}
.area-transform-board-root .atb-works-header>h2{margin:0!important;flex:1;text-align:left}
.area-transform-board-root .atb-works-header>.atb-works-toolbar{position:static;margin:0 0 0 auto;padding:0;border:0;justify-content:flex-end}
.area-transform-board-root .atb-works-header .atb-works-message{margin:0;font-size:14px}

.area-transform-board-root dialog.atb-teacher-confirm[open]{width:min(420px,calc(100vw - 32px))!important}
.area-transform-board-root .atb-teacher-confirm>h2{font-size:20px;line-height:1.5}

@media(max-width:900px) and (orientation:portrait){
  .area-transform-board-root.atb-portrait-tools .canvas-wrap{height:calc(100% - 264px);flex:none;align-items:center;justify-content:center;padding:8px}
  .area-transform-board-root.atb-portrait-tools #atb-btn-bar.atb-toolbox{max-height:240px}
}