/* 一屏作答：圖片支援放大，選項只呈現文字，答案集中在底部。 */
.screen-title{font-size:21px;margin:0;white-space:nowrap}
.topbar{height:56px;padding-inline:16px;gap:12px}
.brand>span:last-child{display:none}
.brand-mark{width:32px;height:34px;font-size:26px;border-radius:8px}
.topbar-right{margin-left:auto;gap:10px}
.topbar .button{min-height:44px;padding:8px 12px;font-size:12px}
.topbar .save-indicator{font-size:11px;max-width:180px}
.page-shell{display:block;max-width:none;padding:8px 12px}
main{display:flex;flex-direction:column;gap:8px}
.workspace.integrated-workspace{display:block;width:100%;max-width:none;margin:0}
.question-pane{container-type:normal;padding:8px;display:flex;flex-direction:column;gap:8px}
.screen-tools{display:flex;align-items:center;justify-content:flex-end;gap:12px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:8px}
.question-annotation-toolbar{position:static;border:0;margin:0;padding:0;gap:6px}
.annotation-mode,.annotation-color{min-height:44px;font-size:12px;padding:8px 10px}
.question-annotation-toolbar .tool-button{width:44px;height:44px}
.screen-tool-options{display:flex;gap:12px;align-items:center}
.screen-tool-options label{font-size:12px;display:flex;align-items:center;gap:6px;min-height:44px}
.screen-tool-options input{accent-color:var(--blue)}
.screen-tool-options .topic-tag{font-size:12px}
.bookmark-button{min-height:44px}
.question-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;min-height:0}
.question-body{display:flex;flex-direction:column;min-height:0;min-width:0}
.question-viewport{display:flex;align-items:flex-start;justify-content:center;min-width:0;min-height:0;height:70svh;overflow:hidden}
.question-sheet{flex:none;max-width:none;width:100%;margin:0;isolation:isolate}
.question-layout .question-sheet{border:0;outline:0;box-shadow:none;background:transparent}
.screen-paper{position:relative;width:840px;padding:16px 24px 20px;transform-origin:top left;-webkit-text-size-adjust:100%;text-size-adjust:100%}
.screen-paper .question-number{font-size:15px;line-height:1.5;margin:0 0 10px}
.screen-paper #question-heading{font-size:24px;font-weight:500;line-height:1.5;margin:0 0 12px}
.screen-paper .statements{font-size:22px;line-height:1.45;margin:0 0 12px}
.screen-paper .statement{gap:12px;margin:0 0 8px}
.screen-paper .statement-number{font-size:20px;min-width:28px;padding:0}
.screen-paper .options{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 24px}
.screen-paper .option-description{position:relative;display:flex;align-items:flex-start;gap:8px;min-height:0;padding:2px 0;border:0;border-radius:0;background:none;box-shadow:none;font-size:22px;line-height:1.5;cursor:default}
.screen-paper .option-letter{display:block;flex:none;width:28px;height:auto;font-size:22px;line-height:1.5;background:none;border:0;border-radius:0;color:var(--ink)}
.screen-paper .option-letter:after{content:"."}
.screen-paper .option-text{min-width:0}
.screen-paper .option-result{position:absolute;right:0;top:-12px;font-size:12px;background:#fff;padding-inline:4px;line-height:1.5}
.screen-paper .answer-correct{color:var(--green)}
.screen-paper .answer-wrong{color:var(--red)}
.screen-paper .answer-note{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;margin:0}
.screen-paper .integrated-working{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.screen-paper .integrated-working h3{font-size:15px;font-weight:400;line-height:1.5;margin:0 0 8px}
.screen-paper .working-grid{height:120px}
.answer-dock{flex:none;padding-top:4px}
.record-actions{display:flex;align-items:center;justify-content:flex-end;gap:12px;min-height:0}
.record-actions button{border:0;background:none;color:var(--blue);font-size:12px;min-height:28px;padding:0 4px;text-decoration:underline;text-underline-offset:3px}
.record-actions:not(:has(button:not([hidden]))){display:none}
.question-footer{display:grid;grid-template-columns:76px minmax(0,1fr) 84px;gap:12px;width:100%;max-width:620px;margin:0 auto;padding:8px 0 0;border-top:1px solid var(--line)}
.question-footer .button{min-height:44px;padding:6px 8px;font-size:12px}
.answer-selection{padding:0;border:0;gap:8px;margin:0}
.answer-choice{min-height:56px;border-radius:8px}
.choice-letter{font-size:20px;line-height:1.3}
.choice-result{font-size:10px;line-height:1.1}
.apparatus{margin:0;padding:0;border:0;outline:1px solid var(--muted);outline-offset:-1px;border-radius:8px;min-width:0;min-height:0;display:flex;flex-direction:column;gap:4px}
.apparatus-zoom{display:block;border:0;background:#fff;padding:0;width:100%;min-height:0;flex:1;cursor:zoom-in}
.question-layout .apparatus img{display:block;width:100%;height:100%;max-width:none;object-fit:contain;margin:0;min-height:0}
.apparatus figcaption{font-size:11px;line-height:1.5;margin:0;text-align:center;color:var(--muted)}
.page-footer{display:none}
.result-strip{flex:none;margin:0;padding:4px 12px;min-height:40px;border-radius:8px}
.result-strip strong{font-size:18px}
.result-strip p{display:none}
.result-strip button{min-height:32px;padding:4px 8px}
.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line)}
.dialog-heading h2{font-size:17px;margin:0}
.dialog-heading .button{min-height:44px;padding:6px 14px}
.question-nav-dialog .sidebar{display:block;position:static;padding:16px;align-self:auto}
.question-nav-dialog .sidebar>h2{display:none}
.question-nav-dialog .sidebar>.eyebrow,.question-nav-dialog .sidebar-note{display:none}
.question-nav-dialog .progress-caption{display:flex;font-size:13px}
.question-nav-dialog .sidebar>progress{display:block;margin:8px 0 20px}
.question-nav-dialog .navigation-groups{display:block}
.question-nav-dialog .nav-group{margin:0 0 18px}
.question-nav-dialog .nav-group h3{display:block;font-size:13px;margin-bottom:8px}
.question-nav-dialog .question-grid{gap:8px}
.question-nav-dialog .question-link{height:44px;font-size:14px}
.question-nav-dialog .nav-legend{display:flex;font-size:12px}
#previous-notes-dialog{max-width:850px}
#previous-notes-dialog .previous-notes{max-width:none}
#previous-notes-dialog summary{display:none}
#previous-notes-dialog .notes-pane{border:0;border-radius:0}
#previous-notes-dialog .paper{aspect-ratio:4/3}
.previous-marks-dialog{max-width:620px}
.legacy-viewport{height:70dvh;overflow:auto;padding:0 12px}
#previous-marks-sheet{margin-inline:auto}
#previous-marks-canvas{pointer-events:none}
#explanation-dialog{max-width:760px}
#explanation-dialog .explanation{border:0;border-radius:0;margin:0;background:#fff;font-size:15px}
.image-dialog{width:calc(100vw - 24px);max-width:none;height:calc(100dvh - 24px);max-height:none}
.image-dialog img{display:block;object-fit:contain;width:100%;height:calc(100% - 69px);padding:8px}
@media(min-width:768px){
  body{height:100dvh;overflow:hidden;display:grid;grid-template-rows:56px minmax(0,1fr)}
  .page-shell,main,.workspace.integrated-workspace,.question-pane{height:100%;min-height:0}
  .page-shell{width:100%;padding:8px 12px}
  .workspace.integrated-workspace{flex:1}
  .question-pane{overflow:hidden}
  .screen-tools{flex:none;flex-wrap:nowrap}
  .question-layout{flex:1;grid-template-rows:minmax(140px,.25fr) minmax(0,.75fr)}
  .question-body{height:100%}
  .question-viewport{height:auto;flex:1}
  .apparatus{height:100%}
}
@media(min-width:1000px){
  .question-layout{grid-template-columns:minmax(240px,.26fr) minmax(0,.74fr);grid-template-rows:minmax(0,1fr);gap:16px}
}
@media(min-width:768px) and (max-width:999px){
  .screen-tool-options .topic-tag{display:none}
  .topbar .save-indicator{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
}
@media(max-width:767px){
  .topbar{padding-inline:10px;gap:8px}
  .screen-title{font-size:16px}
  .brand{display:none}
  .topbar-right{gap:6px}
  .topbar .button{font-size:11px;padding-inline:8px}
  .topbar .save-indicator{display:none}
  .submit-button .icon{display:none}
  .screen-tools{gap:4px}
  .screen-tool-options .topic-tag{display:none}
  .apparatus{height:220px}
  .question-footer{grid-template-columns:60px minmax(0,1fr) 70px;gap:6px}
  .question-annotation-toolbar{gap:4px}
}

.question-paper .legacy-question-heading{font-weight:600;color:var(--ink);overflow-wrap:normal}

@media(min-width:768px){
  .page-shell{display:grid;grid-template-columns:246px minmax(0,1fr);grid-template-rows:minmax(0,1fr);gap:12px}
  .page-shell>main{order:1}
  .page-shell>.sidebar{order:0;display:block;position:static;align-self:stretch;height:100%;min-height:0;padding:8px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:auto}
  .page-shell>.sidebar>.eyebrow,.page-shell>.sidebar .sidebar-note{display:none}
  .page-shell>.sidebar>h2{display:block;font-size:18px;margin:0 0 12px}
  .page-shell>.sidebar .progress-caption{display:flex;font-size:12px}
  .page-shell>.sidebar>progress{display:block;margin:8px 0 18px}
  .page-shell>.sidebar .navigation-groups{display:block}
  .page-shell>.sidebar .nav-group{margin:0 0 14px}
  .page-shell>.sidebar .nav-group h3{display:block;font-size:12px;margin:0 0 6px}
  .page-shell>.sidebar .question-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:2px}
  .page-shell>.sidebar .question-link{height:44px;font-size:13px}
  .page-shell>.sidebar .nav-legend{display:flex;font-size:10px;gap:10px}
  .page-shell>.sidebar .filter-button{min-height:44px;margin-top:12px}
  #open-question-nav{display:none}
}
@media(min-width:768px) and (max-width:1280px){
  .screen-tool-options .topic-tag{display:none}
}
@media(min-width:768px) and (max-width:999px){
  .screen-tools{flex-wrap:wrap;gap:4px}
  .screen-tool-options{width:100%;justify-content:flex-end}
  .screen-tool-options label,.screen-tool-options .bookmark-button{min-height:32px}
}

@media(min-width:1000px) and (max-width:1280px){
  .page-shell{padding-inline:8px;gap:8px}
  .question-layout{grid-template-columns:minmax(240px,.30fr) minmax(0,.70fr);gap:12px}
  .screen-tools{gap:8px}
  .screen-tool-options{gap:8px}
}

.question-layout{position:relative;isolation:isolate}
.calculation-extension{position:absolute;left:0;z-index:0;pointer-events:none;background-image:linear-gradient(#dbe4f066 1px,transparent 1px),linear-gradient(90deg,#dbe4f066 1px,transparent 1px)}
#question-canvas{inset:auto;left:0;top:0;z-index:2}
.answer-dock{position:relative;z-index:3}
@media(min-width:1000px){
  .question-layout .apparatus{height:auto;align-self:start;position:relative;z-index:1}
  .question-layout .apparatus-zoom{flex:none}
  .question-layout .apparatus img{height:auto;object-position:top center}
}

/* 保存異常在所有尺寸均可見，草稿備份不需要先交卷。 */
.storage-notice{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 12px;border:1px solid #e2c298;border-radius:8px;background:#fff8ec;color:#67470f;flex:none}
.storage-notice p{margin:0;font-size:13px;line-height:1.5}
.storage-notice .button{flex:none;min-height:44px;padding:6px 12px;font-size:12px}
#download-draft{min-height:44px}
.question-nav-dialog .question-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:4px}
@media(min-width:768px) and (orientation:portrait){
  .page-shell{grid-template-columns:minmax(0,1fr);padding-inline:6px}
  .question-pane{padding-inline:6px}
  #open-question-nav{display:inline-flex}
  .question-layout{grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(140px,.22fr) minmax(0,.78fr)}
  .question-layout .apparatus{height:100%;position:static;align-self:stretch}
  .question-layout .apparatus-zoom{flex:1;min-height:0}
  .question-layout .apparatus img{height:100%;object-position:center}
}

/* 手機會收起品牌標誌，頁面標題仍提供返回首頁的入口。 */
.screen-title a{display:inline-flex;align-items:center;min-height:44px;color:inherit;text-decoration:underline;text-decoration-color:#a8b7ce;text-underline-offset:5px}