.learning-hub-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px 24px;padding:22px 0 28px;border-top:1px solid #dedfd8;color:#68716b;font:13px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;letter-spacing:0;text-align:left}.learning-hub-footer nav{display:flex;flex-wrap:wrap;gap:10px 20px}.learning-hub-footer a{color:inherit;text-decoration:none}.learning-hub-footer a:hover{text-decoration:underline;text-underline-offset:3px}.learning-hub-footer a:focus-visible{outline:2px solid #28624d;outline-offset:4px}.learning-hub-footer--standalone{width:min(1180px,calc(100% - 48px));margin:28px auto 0}.learning-hub-footer--practice{max-width:1100px;margin-top:26px}@media(max-width:560px){.learning-hub-footer{align-items:flex-start;flex-direction:column;gap:12px;font-size:12px}.learning-hub-footer--standalone{width:calc(100% - 32px)}.learning-hub-footer nav{gap:10px 18px}}@layer base,layout,components,responsive;@layer base{html{letter-spacing:0}:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#24322f;background:#f7f6f2;font-synthesis:none;--paper:#f7f6f2;--surface:#fff;--ink:#24322f;--muted:#727972;--green:#28624d;--line:#dedfd8;--selected:#e8efea;--error:#a34236}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button,select{color:inherit}button{background:none;border:0}a{color:inherit}button,input,select{outline-offset:3px}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--green)}h1,h2,h3,p{margin:0}h1,h2,.brand{font-family:Georgia,Times New Roman,serif}h2{font-size:21px;line-height:1.3;font-weight:600}svg{flex-shrink:0;stroke-width:1.75}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:280px;top:-100px;z-index:100;background:#fff;padding:12px}.skip-link:focus{top:8px}input[type=checkbox],input[type=range]{accent-color:var(--green)}}@layer layout{.app-shell{min-height:100dvh}.library{width:248px;position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:26px 22px 22px;background:#fafaf7;z-index:10}.workspace{margin-left:248px;padding:28px 32px 24px;max-width:2000px}.study-header{margin-bottom:26px;padding:0 4px}.breadcrumb{color:#5f6862;font-size:13px;font-weight:500;display:flex;gap:13px;margin-bottom:12px}.title-row{display:flex;align-items:center;justify-content:space-between;gap:20px}h1{font-size:clamp(30px,2.6vw,42px);letter-spacing:-1.15px;line-height:1.15;font-weight:600;max-width:1020px}.subtitle{font-family:Georgia,serif;color:#656d66;font-size:18px;line-height:1.5;margin-top:9px}.header-navigation{display:flex;gap:10px;flex-shrink:0}.study-grid{display:grid;grid-template-columns:minmax(0,1fr) 286px;gap:14px;align-items:start;border:0;padding:0;margin:0;min-width:0}.graph-panel,.answers-panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;min-width:0}.graph-panel{overflow:hidden}.answers-panel{padding:19px 20px 18px}.bottom-navigation{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:16px;margin-top:20px}.mobile-topbar,.mobile-only{display:none}}@layer components{.brand-row{border-bottom:1px solid var(--line);padding-bottom:22px;margin-bottom:22px;display:flex;align-items:center;justify-content:space-between}.brand{text-decoration:none;font-size:29px;font-weight:700;letter-spacing:-1px;white-space:nowrap}.library-controls{display:flex;flex-direction:column;gap:12px}.library select{width:100%;border:1px solid #d6d9d3;border-radius:6px;background:#fff;padding:10px 9px;font-size:13px;min-height:39px}.library .type-select{border:none;background:transparent;font-family:Georgia,serif;font-size:20px;font-weight:600;padding:0;min-height:28px;margin-bottom:3px;letter-spacing:-.45px}.search{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid #d6d9d3;border-radius:6px;padding:9px;color:#5e6963}.search input{min-width:0;width:100%;border:0;font-size:13px;background:transparent;color:var(--ink);outline:0}.search:focus-within{outline:2px solid var(--green);outline-offset:2px}.search button{padding:0;display:flex}.search input::placeholder{color:#778079}.unfinished{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:11px;padding:0 1px;margin-top:1px}.unfinished input{margin:0;width:13px;height:13px}.unfinished span{margin-left:auto;font-variant-numeric:tabular-nums}.activity-list{overflow:auto;flex:1;min-height:0;margin:18px -8px 12px -2px;padding-right:6px;scrollbar-width:thin;scrollbar-color:#d9ddd6 transparent}.activity-list details{padding-bottom:16px;margin-bottom:12px;border-bottom:1px solid #e6e7e0}.activity-list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:650;font-size:13px;padding:10px 3px}.activity-list summary::-webkit-details-marker{display:none}.activity-list details:not([open]) summary svg{transform:rotate(-90deg)}.set-items{display:flex;flex-direction:column;gap:4px;margin-top:2px}.activity{text-align:left;display:flex;flex-direction:column;gap:3px;line-height:1.35;font-size:13px;color:#56625b;padding:10px 10px 10px 13px;border-left:3px solid #e6e8e2;border-radius:0 6px 6px 0;margin-left:2px;width:calc(100% - 2px)}.activity:hover{background:#f0f2ec}.activity.selected{background:var(--selected);border-left-color:var(--green);color:#234d3d;font-weight:550}.activity-type{font-size:11px;font-weight:400;display:flex;align-items:center;justify-content:space-between;color:#7e867f}.selected .activity-type{color:var(--green)}.activity-progress{font-size:10px;color:var(--green);margin-top:2px;font-weight:400}.empty-search{font-size:13px;line-height:1.6;padding:12px 4px;color:var(--muted)}.library-footer{font-size:11px;line-height:1.5;color:#81867e;padding-top:14px;border-top:1px solid var(--line)}.transfer-actions{display:flex;gap:18px;margin-top:9px}.transfer-actions button{display:flex;gap:5px;align-items:center;padding:0;font-size:11px;color:#64766a}.library-footer p+p{margin-top:8px}.button{border:1px solid #d6dbd3;background:#fff;border-radius:6px;padding:10px 14px;font-size:12px;font-weight:500;display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:39px}.button:hover:not(:disabled){background:#f0f4ee;border-color:#a4b6a9}.button.primary{background:var(--green);border-color:var(--green);color:#fff;font-weight:600}.button.primary:hover:not(:disabled){background:#204e3e}.icon-button{display:inline-flex;align-items:center;justify-content:center;padding:7px;min-height:32px;min-width:32px;border-radius:5px;color:#52665a}.icon-button:hover:not(:disabled){background:#edf2ec}.icon-button.square{width:43px;height:43px;background:#fff;border:1px solid #d6dbd3;color:var(--ink)}.text-button{font-size:12px;color:var(--green);display:inline-flex;align-items:center;gap:6px;font-weight:500;padding:6px 0 6px 6px}.text-button:hover{text-decoration:underline}.panel-heading{display:flex;justify-content:space-between;align-items:center;padding:17px 20px 14px;min-height:59px}.worksheet-image{display:flex;justify-content:center;align-items:center;padding:0 16px 12px;min-height:440px}.worksheet-image img{display:block;width:100%;height:auto}.worksheet-image p{font-size:14px;line-height:1.65;max-width:400px;color:var(--error)}.graph-caption{border-top:1px solid #eef0e9;color:#7a8179;font-size:11px;padding:13px 20px;line-height:1.5}.audio-strip{display:flex;align-items:center;gap:18px;position:relative;flex-wrap:wrap;padding:11px 16px;border:1px solid var(--line);border-radius:9px;background:#fff;margin-bottom:20px;min-height:66px}.audio-strip audio{display:none}.play-button{display:flex;align-items:center;justify-content:center;background:var(--green);color:#fff;width:42px;height:42px;border-radius:50%;padding:0;flex-shrink:0}.play-button:hover{background:#204e3e}.audio-time{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;width:80px}.audio-seek{flex:1;min-width:50px;cursor:pointer;height:18px}.audio-rate{border:0;background:transparent;font-size:12px;width:58px}.audio-error{flex-basis:100%;font-size:12px;color:var(--error)}.answer-heading{display:flex;justify-content:space-between;align-items:center}.answer-heading .icon-button{margin-right:-5px}.answer-count{font-size:12px;color:var(--muted);margin:2px 0 14px}.answer-fields{display:flex;flex-direction:column;gap:9px}.answer-field{display:flex;align-items:center;gap:10px;flex-wrap:wrap;position:relative;min-width:0}.answer-field label{font-size:12px;width:18px;text-align:right;color:#59655d;flex-shrink:0}.input-wrap{position:relative;display:flex;min-width:0;flex:1}.answer-field input{width:100%;min-width:0;border:1px solid #d5dad2;box-shadow:inset 0 1px 2px #00000003;background:#fff;border-radius:4px;height:33px;padding:5px 27px 5px 9px;font-size:13px;color:var(--ink)}.answer-field.correct input{border-color:#73a98b;background:#f5faf6}.answer-field.incorrect input{border-color:#d09083;background:#fff9f6}.answer-field.empty input{border-style:dashed}.input-icon{position:absolute;right:7px;top:9px;pointer-events:none}.correct .input-icon{color:#377454}.incorrect .input-icon{color:var(--error)}.revealed-word{flex-basis:100%;font-size:12px;color:var(--green);margin-left:28px;text-decoration:underline;text-underline-offset:3px;line-height:1.4}.answer-actions{display:flex;flex-direction:column;gap:8px;margin-top:15px}.answer-actions>.button{width:100%;color:var(--green)}.answer-actions>.primary{color:#fff}.score{font-size:12px;color:#73523d;line-height:1.6;margin-top:14px}.score.perfect{color:var(--green)}.review-note,.answer-help{font-size:10px;color:#8a8d83;line-height:1.5;margin-top:12px}.error-text{color:var(--error);font-size:12px;line-height:1.5;margin-top:10px}.answer-help{padding-top:11px;border-top:1px solid #edf0e8}.native-diagram{padding:4px 24px 24px}.diagram-root{border:1.5px solid #54816a;border-radius:6px;padding:16px 18px;text-align:center;max-width:440px;margin:0 auto;background:#f4f7f0;font-family:Georgia,serif;font-weight:600;font-size:21px;line-height:1.3}.diagram-stem{height:36px;display:flex;align-items:center;justify-content:center;color:#8ca28d}.diagram-branches{display:grid;grid-template-columns:1fr 1fr;gap:18px 22px;position:relative}.diagram-section{padding:18px;border:1px solid #cbd7cb;border-radius:7px;background:#fffefb;position:relative}.diagram-section:before{content:"";position:absolute;top:-19px;left:50%;height:18px;border-left:1px solid #9db29e}.diagram-section h3{font-family:Georgia,serif;font-size:17px;line-height:1.35;font-weight:500;display:flex;gap:8px;align-items:flex-start;padding-bottom:10px;border-bottom:1px solid #e4e8df}.section-number{border:1px solid #9daf9c;border-radius:50%;height:22px;min-width:22px;display:flex;align-items:center;justify-content:center;font:11px/1 system-ui;margin-top:1px;color:var(--green)}.diagram-section ul{padding-left:15px;margin:12px 0 0;font-size:13px;line-height:1.9;color:#4c5c50}.diagram-section li+li{margin-top:10px}.answer-field.inline{display:inline-flex;vertical-align:baseline;gap:4px;width:130px;margin:2px 3px 2px 0;align-items:center}.answer-field.inline label{font-size:10px;width:auto;min-width:11px;color:#799178}.answer-field.inline input{border:0;border-bottom:1px solid #779c7b;border-radius:0;background:#f1f6ed;height:27px;box-shadow:none;padding:3px 20px 3px 6px;font-size:12px}.answer-field.inline .input-icon{top:6px;right:3px}.answer-field.inline.incorrect input{border-color:#c07867;background:#fff0e9}.answer-field.inline.correct input{background:#e7f2e5}.answer-field.inline .revealed-word{margin-left:15px;font-size:11px}.native-diagram.short .diagram-branches{grid-template-columns:1fr;max-width:610px;margin:auto;gap:24px}.native-diagram.short .diagram-section{padding:16px 20px}.native-diagram.short .diagram-section h3{font-size:18px}.native-diagram.short .diagram-section ul{font-size:14px}.native-diagram.short .diagram-section:before{top:-25px;height:24px}.image-dialog{border:1px solid var(--line);border-radius:10px;padding:0;width:calc(100vw - 48px);max-width:1900px;max-height:calc(100dvh - 48px);background:#fff;color:var(--ink)}.image-dialog::backdrop{background:#1e3027b8}.dialog-toolbar{padding:12px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:16px}.dialog-toolbar h2{font-size:20px;flex:1}.dialog-toolbar label{font-size:12px;display:flex;align-items:center;gap:8px}.dialog-toolbar select{font-size:12px;background:#fff;border:1px solid var(--line);border-radius:4px;padding:5px}.enlarged-scroll{overflow:auto;max-height:calc(100dvh - 122px)}.enlarged-scroll img{max-width:none;height:auto;display:block}.state-message{padding:80px 24px;line-height:1.6}.state-message h1{font-size:30px;margin-bottom:15px}.state-message .button{margin-top:18px;margin-right:10px}.drawer-shade{display:none}}@layer responsive{.mobile-only{display:none}.skip-link:not(:focus){clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap}@media(min-width:1600px){.worksheet-image{min-height:510px}.workspace{padding-left:38px;padding-right:38px}.study-grid{grid-template-columns:minmax(0,1fr) 310px}.answer-field input{height:36px}.answer-fields{gap:10px}}@media(max-width:1250px){.library{width:224px;padding:24px 18px}.brand{font-size:27px}.workspace{margin-left:224px;padding:24px}.study-grid{grid-template-columns:minmax(0,1fr) 246px}.answers-panel{padding:16px}.worksheet-image{min-height:355px;padding:0 10px 10px}.diagram-branches{grid-template-columns:1fr}.native-diagram{padding:4px 16px 20px}.subtitle{font-size:16px}.audio-strip{gap:10px}.audio-time{width:74px}.panel-heading{padding-left:16px;padding-right:16px}}@media(max-width:1020px){.study-grid{grid-template-columns:1fr}.answers-panel{padding:20px}.answer-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px}.answer-actions{display:flex;flex-direction:row;max-width:520px;gap:12px}.answer-help{margin-top:16px}.worksheet-image{min-height:0;padding-bottom:15px}.diagram-branches{grid-template-columns:1fr 1fr}.title-row{gap:10px}.header-navigation{gap:5px}.icon-button.square{width:34px;height:34px}.study-header{margin-bottom:22px}.subtitle{max-width:450px}.audio-strip{margin-bottom:16px}}@media(max-width:760px){.library{transform:translate(-100%);width:282px;box-shadow:12px 0 50px #0002;padding:22px;transition:transform .16s ease;z-index:40}.library.open{transform:translate(0)}.library .mobile-only{display:inline-flex!important}.drawer-shade{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#24322f66;z-index:30}.workspace{margin-left:0;padding:0 16px 22px}.mobile-topbar{display:flex!important;justify-content:space-between;align-items:center;padding:14px 0 18px}.mobile-topbar>span{font-family:Georgia,serif;font-size:22px;font-weight:600}.mobile-topbar .button{font-size:12px;padding:7px 10px;min-height:35px}.breadcrumb{font-size:12px;margin-bottom:10px}.study-header{padding:3px 1px 0;margin-bottom:18px}h1{font-size:30px;line-height:1.17;letter-spacing:-.7px}.header-navigation{display:none}.subtitle{font-family:inherit;font-size:13px;line-height:1.6;max-width:100%;margin-top:10px}.audio-strip{padding:9px 11px;gap:9px;min-height:60px}.play-button{width:36px;height:36px}.audio-time{font-size:10px;width:64px}.audio-rate{font-size:11px;width:50px}.restart-audio{display:none}.audio-seek{width:50px}.panel-heading{padding:12px 14px;min-height:51px}h2{font-size:20px}.text-button{font-size:11px}.worksheet-image{padding:0 5px 6px}.graph-caption{font-size:10px;padding:11px 14px}.answers-panel{padding:16px}.answer-fields{gap:10px 13px}.answer-field{gap:6px}.answer-field input{font-size:16px;height:38px;padding-left:7px}.input-icon{top:11px}.answer-field label{font-size:11px;width:16px}.answer-actions{gap:9px}.button{font-size:12px;padding:10px}.native-diagram{padding:2px 14px 20px}.diagram-branches{grid-template-columns:1fr;gap:24px}.diagram-root{font-size:21px;padding:15px}.diagram-section{padding:16px}.diagram-section:before{top:-25px;height:24px}.diagram-section ul{font-size:14px;line-height:1.9}.answer-field.inline{width:142px}.answer-field.inline input{font-size:16px;height:30px}.answer-field.inline .input-icon{top:8px}.diagram-section h3{font-size:18px}.bottom-navigation{margin-top:16px;padding-top:14px}.bottom-navigation .button{font-size:11px;gap:3px}.image-dialog{width:calc(100vw - 16px);max-height:calc(100dvh - 24px);border-radius:6px}.dialog-toolbar{gap:8px;padding:9px}.dialog-toolbar h2{font-size:15px}.dialog-toolbar label{font-size:10px}.dialog-toolbar select{padding:4px}.enlarged-scroll{max-height:calc(100dvh - 100px);min-height:240px}.image-dialog .enlarged-scroll img{min-width:900px}.skip-link{left:16px}.state-message{padding:50px 5px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}}@layer responsive{.worksheet-image{display:block;overflow:auto;min-height:0;padding:0 10px 12px;scrollbar-width:thin}.image-sheet{position:relative;container-type:inline-size;min-width:900px;isolation:isolate}.image-sheet img,.image-dialog .enlarged-scroll .image-sheet img{display:block;width:100%;min-width:0;height:auto;max-width:none}.image-answer{position:absolute;z-index:1;line-height:1}.image-answer input{display:block;width:100%;height:100%;border:0;border-bottom:1.5px solid #527b68;border-radius:2px 2px 0 0;padding:0 2px;font-size:var(--field-font);font-weight:550;color:#204f3c;background:#e4efe7e8;box-shadow:none;text-align:center;outline-offset:2px;min-width:0}.image-answer input:hover{background:#d4e9db}.image-answer:focus-within{z-index:5}.image-answer input:focus{min-width:135px;min-height:30px;font-size:max(16px,var(--field-font));background:#fffef7;box-shadow:0 2px 7px #24322f26;outline:2px solid var(--green)}.image-answer.correct input{background:#d9eddef2;border-color:#39734d;color:#225936}.image-answer.incorrect input{background:#ffe4daf2;border:1px solid #bd6956;color:#903b2b}.image-answer.empty input{border-bottom-style:dashed}.image-key{position:absolute;left:0;top:100%;white-space:nowrap;font-size:max(12px,var(--field-font));background:#fffef5;color:var(--green);padding:2px 4px;border:1px solid #b8cfba;border-radius:3px;text-decoration:underline;z-index:3}.image-answer:has(.image-key){z-index:2}.image-dialog .enlarged-scroll{padding:10px}.image-dialog .enlarged-scroll .image-sheet{min-width:1000px}.native-diagram{padding:6px 22px 28px;container-type:inline-size;background:#fffefa}.diagram-canvas{position:relative;padding:0 0 2px}.diagram-links{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;overflow:visible;pointer-events:none;fill:none;stroke:#8c9e91;stroke-width:1.7}.diagram-links path{stroke:var(--branch-line,#8c9e91)}.diagram-root{position:relative;z-index:1;max-width:380px;margin:0 auto 44px;border:1.5px solid #486857;border-radius:45% 39% 42% 35%/24% 34% 28% 30%;background:#f0f4e9;padding:18px 26px;font-size:23px;line-height:1.25;box-shadow:3px 3px #dce4d538}.topic-label{display:block;font:9px/1.4 system-ui;letter-spacing:1.7px;color:#607664;margin-bottom:5px}.diagram-branches{display:grid;grid-template-columns:minmax(0,1fr);gap:42px;margin-left:34px;position:relative}.diagram-branch{min-width:0;position:relative}.tone-0{--branch-line:#789a83;--branch-fill:#edf4e9;--branch-ink:#355d45}.tone-1{--branch-line:#c09b79;--branch-fill:#fbefdf;--branch-ink:#825c39}.tone-2{--branch-line:#83a1b2;--branch-fill:#eaf1f6;--branch-ink:#42677d}.tone-3{--branch-line:#aa94ad;--branch-fill:#f4edf3;--branch-ink:#765778}.tone-4{--branch-line:#ada56d;--branch-fill:#f7f4df;--branch-ink:#736b35}.branch-heading{position:relative;z-index:1;display:flex;align-items:center;gap:9px;border:1.5px solid var(--branch-line);border-radius:8px 11px 8px 4px;padding:11px 13px;font:600 18px/1.35 Georgia,serif;background:var(--branch-fill);color:var(--branch-ink)}.section-number{font:10px/1 system-ui;width:24px;height:24px;min-width:24px;margin:0;border:1px solid var(--branch-line);background:#ffffff8c;color:var(--branch-ink)}.branch-notes{display:grid;gap:13px;margin:18px 0 0 32px}.diagram-note{position:relative;z-index:1;padding:12px 14px;border:1px solid #dfdfd5;border-left:2px solid var(--branch-line);border-radius:3px 8px 7px 5px;background:#fffefa;color:#34483c;font-size:14px;line-height:1.85;overflow-wrap:break-word}.answer-field.inline{width:143px;max-width:100%;display:inline-flex;gap:4px;vertical-align:middle;margin:2px 3px 2px 0}.answer-field.inline input{font-size:14px;height:30px;padding:3px 19px 3px 5px}.answer-field.inline label{font-size:10px;min-width:12px;width:auto}.answer-field.inline .input-icon{top:7px;right:2px}@container (min-width:820px){.diagram-branches{grid-template-columns:minmax(0,1fr) minmax(0,1fr);margin-left:0;column-gap:58px;row-gap:44px}.diagram-root{margin-bottom:42px}}@media(max-width:760px){.native-diagram{padding:5px 13px 22px}.diagram-branches{margin-left:25px;gap:34px}.diagram-root{font-size:21px;max-width:290px;padding:16px 20px}.branch-heading{font-size:17px;padding:10px}.branch-notes{margin-left:23px;gap:12px}.diagram-note{padding:10px 12px;font-size:14px}.answer-field.inline{width:140px}.answer-field.inline input{font-size:16px;height:31px}.worksheet-image{padding:0 5px 7px}}}@layer responsive{.study-grid{grid-template-columns:minmax(0,1fr)}.answer-fields{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px 24px}.answer-actions{flex-direction:row;max-width:460px}.image-sheet{min-width:0}.graph-tools{display:flex;align-items:center;gap:18px}.graph-tools .button{min-height:31px;padding:6px 12px;color:var(--green)}@media(max-width:1020px){.answer-fields{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:760px){.answer-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 15px}.graph-tools{gap:10px}.graph-tools .button{font-size:10px;padding:5px 7px}.dialog-toolbar{flex-wrap:wrap}.dialog-toolbar h2{flex-basis:calc(100% - 50px);order:0}.dialog-toolbar .icon-button{order:1}.dialog-toolbar .button,.dialog-toolbar label{order:2}.image-answer input:focus{min-width:110px}.image-answer:has(.image-key){z-index:3}}}@layer responsive{.edition-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:18px}.level-switch{display:flex;padding:3px;border:1px solid #cdd1cd;border-radius:7px;background:#fff;gap:3px}.level-switch button{min-height:36px;min-width:76px;padding:7px 17px;border-radius:4px;font-size:13px;font-weight:600}.level-switch button[aria-pressed=true]{background:#29332f;color:#fff}.edition-row p{font-size:13px;line-height:1.6;color:#414d46}.edition-row p span{color:#6a736c;white-space:nowrap}.edition-help{font-size:11px;color:#737b74;margin-top:7px}.library-edition{font-size:11px;color:#647067;line-height:1.4}.hard-diagram{background:#fff;color:#222;padding:16px 28px 30px}.hard-diagram .diagram-root{background:#fff;color:#252525;border:2px solid #444;border-radius:5px;box-shadow:none;max-width:540px;font-size:24px}.hard-diagram .topic-label{color:#666}.hard-diagram .diagram-branches{grid-template-columns:minmax(0,1fr);margin-left:34px;gap:30px}.hard-diagram .diagram-branch,.hard-diagram .diagram-links path{--branch-line:#9b9b9b;--branch-fill:#f5f5f4;--branch-ink:#292929}.hard-diagram .diagram-links{stroke-width:1.5}.hard-diagram .branch-heading{border-radius:4px;font:600 17px/1.4 system-ui;background:#f4f4f2}.hard-diagram .section-number{background:#fff;border-radius:3px;color:#555}.hard-diagram .diagram-note{background:#fff;border-radius:3px;color:#303030;font-size:15px;line-height:2;padding:12px 18px}.hard-diagram .answer-field.inline{width:var(--response-width,17ch);max-width:100%}.hard-diagram .answer-field.inline input{background:#f8f8f7;border:0;border-bottom:1px solid #626262;border-radius:0;color:#222;font-size:15px}.hard-diagram .answer-field.correct input{background:#f0f7f1;border-color:#4c805b}.hard-diagram .answer-field.incorrect input{background:#fff1ed;border-color:#b26653}.hard-diagram .answer-field.inline:focus-within input{background:#fff;border-color:#222}@media(max-width:760px){.edition-row{gap:10px;margin-top:16px}.edition-row p{font-size:12px}.level-switch button{min-height:40px}.hard-diagram{padding:12px 10px 24px}.hard-diagram .diagram-root{font-size:20px;padding:16px;max-width:100%}.hard-diagram .diagram-branches{margin-left:19px}.hard-diagram .branch-notes{margin-left:16px}.hard-diagram .diagram-note{font-size:14px;padding:10px;line-height:2.1}.hard-diagram .answer-field.inline input{font-size:16px}}}@layer responsive{.dictation-card{max-width:1100px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:28px 30px 24px}.dictation-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-bottom:20px;border-bottom:1px solid var(--line)}.dictation-kicker{font-size:10px;letter-spacing:1.4px;text-transform:uppercase;color:var(--muted);margin-bottom:9px}.dictation-heading h2{font-size:28px}.dictation-heading h2 span{color:var(--muted);font-size:21px;font-weight:400}.dictation-heading>p{font-size:12px;color:var(--muted)}.sentence-navigation{display:flex;gap:12px;align-items:center;margin-top:20px}.sentence-navigation select{background:#fff;border:1px solid var(--line);border-radius:6px;min-height:40px;padding:8px 12px;font-size:13px;max-width:100%}.dictation-instructions{font-size:13px;line-height:1.8;color:#59645d;margin:18px 0}.dictation-instructions span{display:block;font-size:12px;color:var(--muted)}.sentence-audio{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:16px 18px;background:#f6f7f4;border:1px solid #e5e8e1;border-radius:7px;margin:22px 0 28px}.sentence-audio audio{display:none}.sentence-audio label{display:flex;align-items:center;gap:8px;font-size:12px;color:#59645d}.sentence-audio select{background:#fff;border:1px solid #d7ddd5;border-radius:4px;min-height:36px;padding:4px 7px}.sentence-play{min-width:165px;font-size:13px}.original-recording{font-size:11px;color:var(--muted)}.dictation-fields{margin:0;padding:0;border:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(116px,1fr));gap:18px 18px;min-width:0}.dictation-word{min-width:0}.word-number{display:block;font-size:10px;color:#7a817a;margin-bottom:7px;font-variant-numeric:tabular-nums}.dictation-word-row{display:flex;align-items:center;gap:4px;min-height:42px}.dictation-word-row>span:empty{display:none}.dictation-word input{width:100%;min-width:0;min-height:42px;border:1px solid #cdd4cb;border-radius:5px;padding:8px;font-size:16px;color:var(--ink);background:#fff}.dictation-punctuation{flex-shrink:0}.supplied-word{font-size:16px;min-height:42px;display:flex;align-items:center;padding:8px;color:#6b736b;background:#f3f4f0;border:1px dashed #d8ddd4;border-radius:5px;overflow-wrap:anywhere}.word-feedback{display:block;min-height:16px;font-size:10px;line-height:1.4;color:#788276;margin-top:5px;overflow-wrap:anywhere}.dictation-word.correct input{border-color:#629773;background:#f0f8f1}.dictation-word.correct .word-feedback{color:#397249}.dictation-word.incorrect input,.dictation-word.empty input{border-color:#c07c6b;background:#fff6f2}.dictation-word.incorrect .word-feedback,.dictation-word.empty .word-feedback{color:#9e4835}.dictation-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px;padding-top:22px;border-top:1px solid #e5e8e1}.dictation-feedback{font-size:13px;line-height:1.7;color:#56675a;margin-top:16px}.dictation-feedback span{display:block;font-size:12px;color:#8b6945}.dictation-answer{border-left:3px solid #6e947b;padding:12px 18px;background:#f3f6ef;margin-top:18px}.dictation-answer>span{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:#6c7d68}.dictation-answer p{font-size:18px;line-height:1.7;margin-top:5px}@media(max-width:760px){.dictation-card{padding:20px 16px}.dictation-heading{align-items:flex-start;flex-direction:column;gap:10px;padding-bottom:16px}.dictation-heading h2{font-size:26px}.sentence-navigation{gap:7px}.sentence-navigation label{min-width:0;flex:1}.sentence-navigation select{font-size:12px;width:100%;padding:8px}.sentence-navigation .button{padding:8px 7px;font-size:11px}.sentence-audio{padding:12px;gap:12px;margin:18px 0 23px}.sentence-play{min-width:148px}.original-recording{font-size:10px}.dictation-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 14px}.dictation-actions{gap:8px}.dictation-actions .button{font-size:11px}.dictation-answer p{font-size:16px}}}@layer responsive{:root{background:#f5f6f5;--paper:#f5f6f5}.library{width:272px;background:#fafbfa}.workspace{margin-left:272px}.brand{font-size:25px;letter-spacing:0}h1{font-size:32px;letter-spacing:0}.dictation-card{border-radius:8px}.dictation-kicker,.dictation-answer>span{letter-spacing:0}.sentence-audio{margin-top:22px}.library .type-select{letter-spacing:0}@media(max-width:1250px){.brand{font-size:24px}}@media(max-width:760px){.workspace{margin-left:0}.library{width:min(300px,calc(100vw - 36px))}h1{font-size:27px}.dictation-word-row>span:first-child{max-width:100%}.dictation-heading h2{font-size:25px}}}:root .account-progress{display:flex;align-items:center;flex-wrap:wrap;gap:10px 14px;border-bottom:1px solid #d4dde0;padding:0 0 16px;margin-bottom:24px;font-size:13px;line-height:1.5}:root .account-progress>span{flex:1 1 230px;overflow-wrap:anywhere}:root .account-progress a{color:#19617d;text-decoration:underline}:root .account-progress .button{font-size:13px;padding:7px 10px}:root .sync-conflict{display:flex;flex-wrap:wrap;align-items:center;gap:10px;flex-basis:100%}:root .sync-conflict strong{flex:1 1 240px;overflow-wrap:anywhere}