/* IELTS reference-led test surface; deliberately independent of the course UI. */
body.cbt-mode{margin:0;overflow:hidden;background:#fff;color:#24282b;font-family:Arial,Helvetica,sans-serif}body.cbt-mode #app{height:100dvh;display:block;overflow:hidden}body.cbt-mode .skip{display:none}.cbt-root{--cbt-bg:#fff;--cbt-ink:#24282b;--cbt-soft:#f5f6f6;--cbt-line:#b8bdc0;--cbt-accent:#075080;--cbt-selected:#e1f0f7;--cbt-font:16px;height:100%;overflow:auto;background:var(--cbt-bg);color:var(--cbt-ink);font:var(--cbt-font)/1.5 Arial,Helvetica,sans-serif;color-scheme:light}.cbt-root *{box-sizing:border-box}.cbt-root button,.cbt-root input,.cbt-root select,.cbt-root textarea{font:inherit}.cbt-root h1,.cbt-root h2,.cbt-root h3,.cbt-root p{color:inherit;font-family:inherit;letter-spacing:normal}.cbt-root h1{font-size:30px;line-height:1.25;font-weight:600}.cbt-root h2{font-size:21px;line-height:1.35;font-weight:600}.cbt-root h3{font-size:18px;line-height:1.4}.cbt-root p{line-height:1.5;margin:0 0 18px}.cbt-root a{color:var(--cbt-accent);font-weight:600}.cbt-root button{border:1px solid var(--cbt-line);border-radius:3px;background:var(--cbt-bg);color:var(--cbt-ink);padding:8px 14px;cursor:pointer;line-height:1.4;min-height:40px}.cbt-root button:hover{background:var(--cbt-selected)}.cbt-root button:disabled{opacity:.4;cursor:default}.cbt-root :is(button,a,input,textarea,select,[tabindex]):focus-visible{outline:3px solid #2d91bd;outline-offset:3px}.cbt-root svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}.cbt-root .cbt-primary{background:#075080;color:#fff;border-color:#075080;padding:11px 22px;font-weight:700}.cbt-root .cbt-primary:hover{background:#063e63}.cbt-root [hidden]{display:none!important}.cbt-visually-hidden,.cbt-live:empty{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.cbt-live:not(:empty){position:fixed;left:50%;transform:translateX(-50%);bottom:115px;max-width:90vw;background:#233d49;color:#fff;padding:10px 18px;z-index:90;border-radius:4px;box-shadow:0 2px 8px #0002;pointer-events:none}.cbt-entry-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 34px;border-bottom:1px solid var(--cbt-line);background:var(--cbt-bg)}.cbt-brand{display:block;flex:0 0 auto;line-height:0}.cbt-brand img{display:block;width:120px;height:40px;object-fit:contain;background:white}.cbt-entry{max-width:1080px;padding:48px 40px 70px;margin:0 auto}.cbt-entry h1{font-size:36px;margin:12px 0 18px}.cbt-eyebrow{font-size:12px;letter-spacing:.1em!important;font-weight:700;color:#426778!important;margin-bottom:10px!important}.cbt-intro-lead{font-size:20px;margin-bottom:32px!important}.cbt-entry-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:64px}.cbt-field{display:flex;flex-direction:column;gap:8px;font-weight:600;max-width:100%;margin-bottom:20px}.cbt-field :is(input,select,textarea),.cbt-option-settings select{width:100%;padding:10px 12px;border:1px solid var(--cbt-line);border-radius:3px;background:var(--cbt-bg);color:var(--cbt-ink)}.cbt-section-list{list-style:none;margin:22px 0;padding:0}.cbt-section-list li{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px solid #d8dee0}.cbt-section-list li span:last-child{font-size:14px;color:#566068;text-align:right}.cbt-before{border-left:1px solid #d8dee0;padding-left:32px}.cbt-before h2{margin:0 0 18px}.cbt-before p{font-size:15px}.cbt-entry-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:26px}.cbt-shortcuts{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:14px;margin-top:25px}.cbt-shortcuts>span{flex-basis:100%;color:#59656b}.cbt-step-list{display:flex;list-style:none;padding:0;gap:28px;margin:0 0 40px}.cbt-step-list li{display:flex;align-items:center;gap:8px;color:#5b676c;border-bottom:3px solid transparent;padding-bottom:8px}.cbt-step-list .current{color:var(--cbt-accent);font-weight:700;border-color:var(--cbt-accent)}.cbt-ready{max-width:800px}.cbt-alert{border-left:4px solid #358062;padding:14px 18px;background:#eff7f2;color:#253d33!important}.cbt-error,.cbt-save-error{color:#ad2020!important}.cbt-small{font-size:13px}.cbt-running{display:flex;flex-direction:column;overflow:hidden}.cbt-top{display:flex;align-items:center;gap:24px;padding:10px 28px;border-bottom:1px solid #7594a2;background:#e4eff4;flex-shrink:0;min-height:72px}.cbt-top .cbt-brand img{width:105px;height:35px}.cbt-candidate{display:flex;flex-direction:column;gap:1px;font-size:13px;line-height:1.45}.cbt-candidate strong{font-size:12px;font-weight:400}.cbt-candidate #cbt-time{font-size:17px;font-weight:700;font-variant-numeric:tabular-nums;white-space:nowrap}.cbt-top-tools{display:flex;gap:12px;margin-left:auto;align-items:center}.cbt-top-tools>button{background:transparent;border:0;padding:8px;min-width:42px}.cbt-top-tools .cbt-leave{border:1px solid #7c919b;padding:6px 12px;font-size:13px;min-height:36px}.cbt-top-tools svg{width:26px;height:26px}.cbt-audio-state{font-size:13px}.cbt-preview-strip{display:flex;justify-content:space-between;gap:12px;padding:5px 28px;font-size:12px;color:#52656d;background:#f6fafb;border-bottom:1px solid #e3e8ea;flex-shrink:0}.cbt-exam-main{flex:1;min-height:0;display:flex;flex-direction:column;padding:16px 32px 8px;overflow:hidden}.cbt-instructions{flex-shrink:0;border:1px solid #9ea6aa;border-radius:4px;background:var(--cbt-soft);padding:10px 15px;margin:0 0 18px}.cbt-instructions h1{font-size:27px;font-weight:400;margin:0 0 5px}.cbt-instructions p{font-size:15px;line-height:1.45;margin:0}.cbt-workspace{flex:1;min-height:0;display:flex;gap:20px;overflow:hidden}.cbt-panes{flex:1;min-width:0;display:flex;overflow:hidden}.cbt-pane{min-width:0;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;padding:0 12px;line-height:1.5}.cbt-split .cbt-passage{flex:0 0 calc(var(--cbt-split,50%) - 8px)}.cbt-split .cbt-answers{flex:1}.cbt-passage h2{font-size:17px;margin:0 0 16px}.cbt-passage h3{font-size:17px;margin:18px 0 10px}.cbt-passage p{white-space:pre-line;margin:0 0 18px}.cbt-divider{width:16px;flex:0 0 16px;cursor:ew-resize;touch-action:none;position:relative}.cbt-divider:before{content:'';position:absolute;left:7px;top:0;bottom:0;border-left:2px solid #7d8589}.cbt-divider:hover:before,.cbt-divider:focus-visible:before{border-color:#1686b2;border-width:3px}.cbt-task-image{display:block;width:100%;height:auto;object-fit:contain;margin:18px auto;max-height:none}.cbt-writing{display:flex;flex-direction:column}.cbt-writing .cbt-question{display:flex;flex-direction:column;flex:1;margin:0;padding:0;min-height:0}.cbt-writing textarea{min-height:260px;height:auto;flex:1;width:100%;border:1px solid #858d91;border-radius:2px;resize:vertical;background:var(--cbt-bg);color:var(--cbt-ink);font:inherit;padding:8px;line-height:1.5}.cbt-word-count{font-size:15px;margin:8px 0 0!important;flex-shrink:0}.cbt-question{margin:0 0 34px;padding:0 0 14px;scroll-margin:12px}.cbt-question-heading{display:flex;gap:10px;align-items:flex-start;margin:0 0 16px}.cbt-root .cbt-question-label{border:0;background:transparent;text-align:left;min-height:0;padding:0;font-size:inherit;font-weight:600;display:block;flex:1;color:inherit}.cbt-question-label>span:first-child,.cbt-question-label>b{display:inline-flex;align-items:center;justify-content:center;min-width:25px;min-height:25px;margin-right:10px;font-weight:400;border:1px solid transparent}.cbt-question.is-current .cbt-question-label>span:first-child,.cbt-question.is-current .cbt-question-label>b{border-color:#9acbdf;background:var(--cbt-selected)}.cbt-root .cbt-flag{border:0;background:transparent;padding:1px 5px;min-height:30px;flex:0 0 auto;color:#899398}.cbt-flag svg{width:18px;height:18px}.cbt-root .cbt-flag.is-flagged{color:#075080;background:#e8f3f8}.cbt-question-instructions{font-size:14px;margin:0 0 12px!important}.cbt-choices{border:0;margin:0;padding:0 0 0 34px}.cbt-choices label{display:flex;align-items:flex-start;gap:12px;margin:12px 0;cursor:pointer}.cbt-choices input{flex-shrink:0;margin-top:6px;width:15px;height:15px;accent-color:#17658d}.cbt-gap-label{display:block;font-size:inherit;line-height:2.5}.cbt-gap-label input{border:1px solid #90989b;border-radius:2px;max-width:100%;width:205px;min-height:34px;text-align:center;font-weight:600;padding:3px 8px;background:var(--cbt-bg);color:var(--cbt-ink);line-height:1.5}.cbt-listening .cbt-answers{width:100%;padding:0 14px}.cbt-listening .cbt-answers>h2{font-size:18px;margin:0 0 22px}.cbt-option-bank{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.cbt-option-bank span{border:1px solid #a8b6bd;border-radius:3px;padding:6px 10px;cursor:grab;background:var(--cbt-soft)}.cbt-diagram{width:100%;max-height:400px;object-fit:contain}.cbt-navigation-arrows{display:flex;justify-content:flex-end;gap:5px;flex-shrink:0;padding-top:8px}.cbt-navigation-arrows button{min-width:48px;min-height:45px;background:#20292d;color:#fff;border:0;padding:8px}.cbt-navigation-arrows button:hover{background:#075080}.cbt-navigation-arrows svg{width:28px;height:28px}.cbt-bottom{flex-shrink:0;background:var(--cbt-bg);border-top:1px solid #d1d8db;padding:0 16px 6px}.cbt-part-nav{display:flex;gap:18px;align-items:stretch;overflow:auto;max-width:100%;padding:7px 0 0;scrollbar-width:thin}.cbt-part-group{display:flex;align-items:center;gap:12px;flex:1;min-width:max-content;border-top:3px solid #d9dcde;padding-top:5px}.cbt-part-group.active{flex:2;border-color:#75a0b5}.cbt-part-group>button{border:0;white-space:nowrap;font-size:14px;padding:4px 0;font-weight:600}.cbt-part-count{font-size:13px;color:#68767e;white-space:nowrap}.cbt-numbers{display:flex;gap:4px;align-items:center}.cbt-numbers button{padding:4px;min-width:28px;min-height:34px;border:1px solid transparent;font-size:14px;border-top:3px solid transparent;position:relative}.cbt-numbers button.answered{border-top-color:#5b8e61}.cbt-numbers button.current{outline:2px solid #1682a8;outline-offset:-2px;background:var(--cbt-selected)}.cbt-numbers button.flagged:after{content:'';position:absolute;right:1px;top:1px;width:7px;height:7px;background:#075080;clip-path:polygon(0 0,100% 0,100% 65%,0 100%)}.cbt-bottom-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:5px}.cbt-end-section{font-size:12px!important;min-height:30px!important;padding:5px 12px!important}.cbt-volume{display:flex;align-items:center;gap:10px;font-size:12px}.cbt-volume input{width:100px;accent-color:#075080}.cbt-mobile-tabs{display:none}.cbt-notes{flex:0 0 250px;overflow:auto;padding:0 12px 10px;background:var(--cbt-soft);border-left:1px solid var(--cbt-line)}.cbt-notes>div{display:flex;justify-content:space-between;align-items:center;gap:12px}.cbt-notes h2{font-size:18px}.cbt-notes>p{font-size:14px}.cbt-notes>div>button{border:0;padding:5px;background:transparent}.cbt-root .cbt-note-item{display:block;white-space:normal;text-align:left;width:100%;padding:12px;margin:0 0 12px;background:#fff4a9;border:1px solid #dbcc7c;color:#292711}.cbt-note-item strong,.cbt-note-item span{display:block;font-size:14px;overflow-wrap:anywhere}.cbt-note-item span{margin-top:8px;font-weight:400;white-space:pre-wrap}.cbt-root mark{background:#fff044;color:#202010;cursor:pointer;padding:0}.cbt-context{position:fixed;z-index:100;display:flex;gap:3px;padding:5px;background:#fff;border:1px solid #8d9da6;box-shadow:0 3px 15px #0002;border-radius:4px}.cbt-context button{font-size:13px;padding:6px 9px;min-height:35px;color:#172a33;background:#fff}.cbt-dialog{padding:28px;max-width:min(600px,calc(100vw - 28px));max-height:85dvh;overflow:auto;border:1px solid #9ca9af;border-radius:5px;background:var(--cbt-bg);color:var(--cbt-ink);box-shadow:0 10px 50px #0003;font:16px/1.5 Arial,Helvetica,sans-serif}.cbt-dialog::backdrop{background:#1b2b344a}.cbt-dialog h2{margin:4px 34px 20px 0;font-size:23px}.cbt-dialog p{margin-bottom:16px}.cbt-dialog-close{position:absolute;right:10px;top:8px;border:0!important;font-size:26px!important;padding:2px 8px!important;background:transparent!important}.cbt-dialog-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.cbt-dialog blockquote{margin:0 0 18px;padding:14px;background:#fff4a9;color:#292711;white-space:pre-wrap}.cbt-option-settings{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}.cbt-option-settings label{display:flex;flex-direction:column;gap:8px}.cbt-time-warning{color:#a31616!important;background:#ffebd7;padding:1px 5px}.cbt-results-summary{display:flex;gap:40px;border-top:1px solid #bbc8cd;border-bottom:1px solid #bbc8cd;margin:26px 0}.cbt-results-summary section{flex:1;padding:16px 0}.cbt-results-summary h2{font-size:16px;margin:0 0 8px}.cbt-results-summary strong{font-size:30px;color:#075080}.cbt-results-summary strong span{font-size:20px;color:#586970}.cbt-results-summary p{font-size:13px;margin:3px 0}.cbt-review-filter{display:flex;gap:10px;margin:28px 0}.cbt-review-filter button[aria-pressed=true]{background:#075080;color:#fff}.cbt-review-item{border-bottom:1px solid #d8e0e3;padding:10px 0 25px;margin-bottom:22px}.cbt-review-item h3{display:flex;gap:12px;align-items:center}.cbt-review-item p,.cbt-written-response{overflow-wrap:anywhere}.cbt-correct,.cbt-incorrect{font-size:12px;padding:3px 7px;background:#ecf5ef;color:#235f3d}.cbt-incorrect{background:#fff2d7;color:#725016}.cbt-explanation{padding:14px 18px;background:#f2f6f8}.cbt-written-response{padding:20px;border:1px solid #c1cdd3;line-height:1.7;white-space:pre-wrap;margin-bottom:18px}.cbt-history-list>a,.cbt-import-row{display:flex;flex-direction:column;gap:6px;border-bottom:1px solid #d8e0e3;padding:18px 0;text-decoration:none}.cbt-history-list span{font-size:14px;font-weight:400;color:#63777f}.cbt-import-row h2{margin:0 0 5px}.cbt-root[data-text-size=large]{--cbt-font:19px}.cbt-root[data-text-size=extra]{--cbt-font:22px}.cbt-root[data-contrast=dark],.cbt-root[data-contrast=yellow]{--cbt-bg:#111;--cbt-ink:#fff;--cbt-soft:#252525;--cbt-line:#888;--cbt-selected:#344148;--cbt-accent:#9cd7ff;color-scheme:dark}.cbt-root[data-contrast=yellow]{--cbt-ink:#fff36b;--cbt-accent:#fff36b}.cbt-root[data-contrast=dark] .cbt-top,.cbt-root[data-contrast=yellow] .cbt-top{background:#20292d;color:var(--cbt-ink)}.cbt-root[data-contrast=dark] .cbt-preview-strip,.cbt-root[data-contrast=yellow] .cbt-preview-strip{background:#171e22;color:var(--cbt-ink)}.cbt-root[data-contrast=dark] .cbt-part-count,.cbt-root[data-contrast=yellow] .cbt-part-count{color:var(--cbt-ink)}
@media(min-width:1100px){.cbt-listening .cbt-answers{display:grid;grid-template-columns:1fr 1fr;align-content:start;column-gap:70px}.cbt-listening .cbt-answers>h2{grid-column:1/-1}.cbt-listening .cbt-question{min-width:0}}
@media(max-width:850px){.cbt-top{gap:16px;padding:9px 16px}.cbt-top-tools{gap:4px}.cbt-audio-state{font-size:12px}.cbt-exam-main{padding:12px 16px 6px}.cbt-notes{flex-basis:210px}.cbt-entry-grid{gap:30px}.cbt-entry{padding:30px 24px 50px}.cbt-entry h1{font-size:30px}.cbt-preview-strip{padding:4px 16px}.cbt-entry-header{padding:12px 24px}}
@media(max-width:650px){.cbt-top{flex-wrap:wrap;gap:5px 12px;padding:8px 12px;min-height:80px}.cbt-top .cbt-brand{display:none}.cbt-candidate{gap:0;flex:1}.cbt-candidate strong{font-size:11px}.cbt-candidate #cbt-time{font-size:17px}.cbt-top-tools{gap:2px}.cbt-top-tools>button{min-width:36px;padding:5px}.cbt-top-tools svg{width:23px;height:23px}.cbt-top-tools .cbt-leave{font-size:11px;min-height:31px;padding:5px 7px}.cbt-audio-state{order:3;flex-basis:100%;line-height:1.3}.cbt-audio-state button{font-size:12px;min-height:26px;padding:1px 8px}.cbt-preview-strip{padding:4px 12px;font-size:10px;line-height:1.4}.cbt-preview-strip span{max-width:43%;text-align:right}.cbt-exam-main{padding:10px 12px 3px}.cbt-instructions{padding:9px 11px;margin-bottom:8px}.cbt-instructions h1{font-size:22px}.cbt-instructions p{font-size:13px}.cbt-mobile-tabs{display:flex;gap:0;flex-shrink:0;border-bottom:1px solid #c8d4da;margin:0 0 10px}.cbt-mobile-tabs button{border:0;flex:1;border-radius:0;font-size:14px;border-bottom:3px solid transparent;min-height:38px}.cbt-mobile-tabs button[aria-pressed=true]{border-bottom-color:#075080;background:var(--cbt-selected);font-weight:700}.cbt-split .cbt-panes{display:block}.cbt-split .cbt-pane{height:100%;width:100%;padding:0 4px}.cbt-divider{display:none}.cbt-mobile-hidden{display:none!important}.cbt-workspace{gap:0;position:relative}.cbt-notes{position:absolute;inset:0;z-index:10;flex:none;min-width:0;border-left:0;padding:0 14px 14px}.cbt-note-item{max-width:100%}.cbt-writing textarea{min-height:160px;resize:none;font-size:16px}.cbt-writing{display:flex!important}.cbt-writing.cbt-mobile-hidden{display:none!important}.cbt-word-count{font-size:13px}.cbt-navigation-arrows{padding-top:4px}.cbt-navigation-arrows button{min-width:40px;min-height:32px;padding:3px}.cbt-navigation-arrows svg{width:24px;height:24px}.cbt-part-nav{gap:16px;padding-top:3px}.cbt-part-group{gap:9px;padding-top:2px}.cbt-part-group>button{font-size:12px;min-height:30px}.cbt-numbers{gap:3px}.cbt-numbers button{min-width:30px;min-height:33px;font-size:13px}.cbt-bottom{padding:0 10px 5px}.cbt-bottom-actions{gap:8px;padding-top:3px}.cbt-volume{font-size:11px;gap:5px}.cbt-volume input{width:70px}.cbt-end-section{font-size:11px!important;min-height:29px!important;padding:4px 8px!important}.cbt-question{margin-bottom:24px}.cbt-question-heading{gap:6px;margin-bottom:12px}.cbt-choices{padding-left:16px}.cbt-choices label{gap:10px;margin:13px 0}.cbt-choices input{width:17px;height:17px;margin-top:4px}.cbt-gap-label{line-height:2}.cbt-gap-label input{width:170px;min-height:36px;font-size:16px}.cbt-entry-header{padding:12px 16px;gap:15px}.cbt-entry-header>a:last-child{font-size:13px}.cbt-entry{padding:28px 20px 45px}.cbt-entry h1{font-size:29px}.cbt-intro-lead{font-size:18px;margin-bottom:22px!important}.cbt-entry-grid{display:block}.cbt-before{border-left:0;border-top:1px solid #cbd8dd;padding:24px 0 0;margin-top:30px}.cbt-section-list li{font-size:15px;gap:12px}.cbt-section-list li span:last-child{font-size:13px;max-width:57%}.cbt-step-list{gap:16px;font-size:14px;margin-bottom:28px}.cbt-dialog{padding:22px 18px}.cbt-option-settings{grid-template-columns:1fr;gap:14px}.cbt-dialog-actions{gap:8px}.cbt-dialog-actions button{font-size:14px}.cbt-results-summary{gap:18px;flex-wrap:wrap}.cbt-results-summary section{min-width:100px}.cbt-results-summary strong{font-size:24px}.cbt-context{max-width:calc(100vw - 16px)}.cbt-context button{font-size:12px;padding:7px}.cbt-live:not(:empty){bottom:100px;font-size:13px}.cbt-root[data-text-size=extra]{--cbt-font:20px}}
@media(prefers-reduced-motion:reduce){.cbt-root *{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

html:has(body.cbt-mode){scrollbar-gutter:auto}