:root{--ink:#213e39;--muted:#5c7068;--paper:#f6f4ed;--line:#d9dfd5;--accent:#df724d}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.7 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}a{color:inherit}button,.start{cursor:pointer;font:inherit;border:1px solid var(--line);background:white;border-radius:6px;padding:8px 14px;color:var(--ink)}button:hover{background:#e7eee5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #cf602f;outline-offset:3px}.topbar{height:84px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 4vw;background:var(--paper);position:sticky;top:0;z-index:5}.brand{text-decoration:none;font-weight:800;font-size:24px;letter-spacing:-1px}.brand span{font-weight:400;font-size:14px;letter-spacing:0;margin-left:14px}.pilot,.eyebrow{font-size:11px;font-weight:750;letter-spacing:2px}.pilot{margin-right:20px}.layout{max-width:1450px;margin:auto;display:grid;grid-template-columns:270px minmax(0,1fr);gap:50px;padding:0 4vw}aside{position:sticky;top:110px;height:calc(100vh - 130px);overflow:auto;padding:25px 15px 15px 0}aside h2{font:28px Georgia,serif;margin:12px 0 25px}nav a{display:flex;gap:16px;text-decoration:none;font-size:14px;padding:9px 0;color:var(--muted)}nav a span{font-size:11px;letter-spacing:1px;color:#8a978c}nav a.active{color:var(--ink);font-weight:750}nav a.done span{color:#a64b2b}nav a.done span:after{content:' ✓'}.progress-box{border-top:1px solid var(--line);margin-top:26px;padding-top:22px;font-size:12px}.progress-box button{font-size:12px;margin:5px 0}progress{display:block;width:100%;height:6px;margin-top:12px;accent-color:var(--ink)}.quiet{background:transparent;border-color:transparent}main{min-width:0}.hero{position:relative;min-height:560px;padding:55px 15px 40px;overflow:hidden}.hero h1{font:clamp(58px,6.5vw,90px)/1.02 Georgia,serif;letter-spacing:-4px;margin:26px 0;color:var(--ink);position:relative;z-index:1}.hero em{font-weight:400;color:#ba583a}.intro{color:var(--muted);font-size:18px}blockquote{margin:28px 0;font:italic 18px Georgia,serif;max-width:440px}cite{display:block;font:11px/2.5 -apple-system,sans-serif;color:var(--muted)}.start{display:inline-flex;gap:40px;background:var(--ink);color:white;text-decoration:none;margin-top:12px;border:0}.house{position:absolute;right:1%;bottom:65px;width:230px;height:280px;opacity:.85;transform:rotate(-4deg)}.roof{position:absolute;top:0;left:-15px;width:0;height:0;border-left:130px solid transparent;border-right:130px solid transparent;border-bottom:110px solid #d79a75}.house-body{position:absolute;top:109px;width:230px;height:165px;background:#e6d7b8;border:2px solid #213e39;display:flex;gap:60px;padding:30px}.house-body i{display:block;width:45px;height:45px;border:5px solid #213e39;background:#afc2b5}.house-body b{position:absolute;bottom:0;left:94px;width:42px;height:70px;background:#213e39}.ground{position:absolute;bottom:0;left:-25px;width:285px;border-bottom:2px solid #213e39}.unit-meta{display:flex;justify-content:space-between;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:10px;letter-spacing:1.5px;margin-bottom:45px}.section-card{background:#fffefb;border:1px solid var(--line);border-radius:8px;padding:35px 40px;margin-bottom:28px;scroll-margin-top:100px}.section-title{font:29px/1.25 Georgia,serif;margin:12px 0 24px}.badge{display:inline-block;background:#e9eee5;color:#3e5746;border-radius:4px;font:12px sans-serif;padding:7px 10px;vertical-align:middle;margin-right:10px}h3{font:23px Georgia,serif;margin-top:30px}h4{margin:0 0 8px}li{margin:12px 0}ol,ul{padding-left:24px}.culture-note{padding:22px;background:#edf1e8;border-left:3px solid #88a183;margin:28px 0}.culture-note p:last-child{margin-bottom:0}.target-words-box{background:#f3f0e7;padding:20px;font-size:12px}.word-grid{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:12px;font-size:14px}.reading-text{font:19px/1.95 Georgia,serif;margin:30px 0}.reading-text strong{color:#a94c30}.interactive-line{display:flex;gap:14px;align-items:center;margin:12px 0}input[type=text],textarea,select{font:16px/1.5 inherit;padding:10px 12px;background:white;border:1px solid #b8c5b9;border-radius:4px;color:var(--ink);max-width:100%}input[type=text]{width:100%;font-size:16px}.interactive-line input{flex:1;min-width:0}input[type=checkbox],input[type=radio]{accent-color:var(--ink);width:17px;height:17px;vertical-align:middle}audio{width:min(100%,360px)}.media-player{padding:20px;background:#edf1e8;display:flex;flex-wrap:wrap;gap:15px;align-items:center}.media-player span{font-size:13px}table{border-collapse:collapse;width:100%;font-size:14px}th,td{padding:12px;border:1px solid var(--line);text-align:left}th{background:#edf1e8}td:nth-child(2){min-width:110px}.section-end{border-top:1px solid var(--line);padding-top:22px;margin-top:30px;font-size:13px}.notes{display:block;font-size:13px;margin-top:20px}.notes textarea{display:block;width:100%;min-height:100px;margin-top:8px}.sample{margin:20px 0;background:#f3f0e7;padding:15px;font-size:14px}.sample summary{cursor:pointer;font-weight:700}footer{text-align:center;padding:40px 0 65px;color:var(--muted);font-size:14px}.skip{position:absolute;top:-100px}.skip:focus{top:0;z-index:10;background:white;padding:20px}@media(min-width:1200px){.hero .intro,.hero blockquote{max-width:55%}}@media(max-width:1100px){.house{width:180px;transform:scale(.7) rotate(-4deg);transform-origin:bottom right;right:0;bottom:20px;opacity:.5}.layout{gap:25px;grid-template-columns:220px minmax(0,1fr)}.hero h1{font-size:67px}.section-card{padding:28px}}@media(max-width:760px){.topbar{height:auto;min-height:72px;padding:14px 20px;gap:10px}.brand span,.pilot{display:none}.topbar button{font-size:12px}.layout{display:block;padding:0 20px}aside{position:static;height:auto;padding:24px 0 0}aside h2{display:none}nav{display:flex;overflow-x:auto;gap:20px;padding-bottom:12px}nav a{flex-shrink:0}.progress-box{margin:8px 0;padding:12px 0;display:flex;gap:12px;flex-wrap:wrap;align-items:center}.progress-box progress{width:80px;margin:0}.progress-box p{width:100%;margin:0}.hero{min-height:490px;padding:35px 0}.hero h1{font-size:65px}.house{opacity:.25}.intro,blockquote{position:relative;z-index:1}.unit-meta{font-size:8px;gap:10px}.section-card{padding:24px 18px}.section-title{font-size:25px}.reading-text{font-size:18px}table{display:block;overflow-x:auto}td input[type=text]{min-width:170px}}@media print{body{background:white;color:black}.topbar,aside,.house,.start,.section-end,button{display:none!important}.layout{display:block;padding:0}.hero{min-height:0;padding:0}.hero h1{font-size:44px}.hero h1 br{display:none}.unit-meta{margin-bottom:20px}.section-card{break-inside:avoid;border:0;padding:12px 0}.reading-text{font-size:12pt}audio{display:none}input,textarea{border:1px solid #aaa!important}html{scroll-behavior:auto}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.word-help{font-weight:400;letter-spacing:0;font-size:13px;margin:8px 0}.target-word{font-weight:400;color:inherit}.target-word.is-highlighted{font-weight:700;color:#a94c30}#word-status{font-size:12px;margin:10px 0 0}

button.target-word{display:inline;appearance:none;background:transparent;border:0;border-radius:0;padding:0;margin:0;font:inherit;color:inherit;letter-spacing:inherit;vertical-align:baseline;cursor:pointer}button.target-word:hover{background:transparent}button.target-word.is-highlighted{font-weight:700;color:#a94c30}button.target-word:focus-visible{outline:2px solid #a94c30;outline-offset:2px}
@media print{button.target-word{display:inline!important}}

.language-focus{margin-top:32px;border-top:1px solid var(--line);padding-top:8px}.language-focus h4{margin-top:28px;color:#a94c30}.noun-intro,.noun-parts{padding:20px;background:#edf1e8;border-left:3px solid #88a183}.noun-intro p:first-child,.noun-parts p:first-child{margin-top:0}.noun-examples{display:grid;grid-template-columns:1fr 1fr;gap:0 22px;background:#fffefb;padding:12px 18px}.noun-examples p{margin:6px 0}.noun-hint{font-size:13px;color:var(--muted)}.noun-bank{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.noun-choice{padding:7px 10px;background:transparent}.noun-choice[aria-pressed=true]{background:#213e39;color:white}.noun-sentences{line-height:2.1}.noun-sentences li{margin:9px 0}button.noun-word{appearance:none;display:inline;background:transparent;color:inherit;border:1px solid transparent;border-radius:50%;padding:0 3px;font:inherit;line-height:1.5;vertical-align:baseline;cursor:pointer}button.noun-word:hover{background:transparent}button.noun-word[aria-pressed=true]{border-color:#a94c30}button.noun-word:disabled{opacity:1;cursor:default}.noun-parts{margin-top:28px}.noun-parts span{font-size:14px}@media(max-width:600px){.noun-bank{grid-template-columns:repeat(2,minmax(0,1fr))}.noun-examples{grid-template-columns:1fr}}@media print{button.noun-word,button.noun-choice{display:inline!important}.noun-bank{display:flex;flex-wrap:wrap}}

.crossword-clues ol{padding-left:25px}.crossword-clue{text-align:left;border:0;background:transparent;padding:2px 0;line-height:1.6}.crossword-clue small{color:var(--muted);white-space:nowrap}.crossword-scroll{overflow-x:auto;padding:8px 2px}.crossword-grid{display:grid;grid-template-columns:repeat(11,32px);grid-template-rows:repeat(10,32px);width:352px;gap:0;margin:12px auto}.crossword-cell{position:relative;border:1px solid #637d70;margin-right:-1px;margin-bottom:-1px;background:white;min-width:0}.crossword-number{position:absolute;top:0;left:3px;font-size:9px;line-height:1.1;z-index:1;pointer-events:none}.crossword-cell input.crossword-letter{display:block;width:100%;height:100%;border:0;border-radius:0;padding:8px 0 0;text-align:center;font:19px/1.2 Georgia,serif;text-transform:uppercase;background:transparent}.crossword-given{display:flex;align-items:center;justify-content:center;height:100%;padding-top:8px;font:italic 19px Georgia,serif;color:#a94c30;text-transform:uppercase}.crossword-cell:focus-within{background:#edf1e8;z-index:2}.crossword-actions{margin:18px 0}.crossword-actions p{font-size:14px}.crossword-empty{background:transparent}@media print{.crossword-clue{display:inline!important}.crossword-actions{display:none}}
/* Keep clue numbers on the first line when button text wraps. */
.crossword-clues ol{list-style:none;counter-reset:crossword-clue;padding-left:0}
.crossword-clues li{counter-increment:crossword-clue;display:grid;grid-template-columns:1.5em minmax(0,1fr);column-gap:.35em;align-items:start;line-height:1.6}
.crossword-clues li::before{content:counter(crossword-clue) '.';text-align:right;padding-top:2px}
.crossword-clues .crossword-clue{display:block;width:100%;min-width:0;margin:0;vertical-align:top}

.noun-choice.noun-correct[aria-pressed=true]{background:#e1f2e3;color:#225b32;border-color:#5a9467}.noun-choice.noun-incorrect[aria-pressed=true]{background:#f9dfe8;color:#8b294d;border-color:#c67894}.noun-feedback-mark{font-weight:800;white-space:pre}.noun-choice{min-height:44px}

.conversations{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:14px 20px;background:#f3f0e7}.conversations p{margin:5px 0}.question-notice strong{color:#a94c30}.question-practice{line-height:2.5}.question-practice input.question-blank{display:inline-block;width:90px;padding:2px 6px;border:0;border-bottom:1px solid #637d70;border-radius:0;background:transparent;text-align:center;font:inherit;line-height:1.5}.given-question{display:inline-block;width:90px;border-bottom:1px solid #637d70;text-align:center;line-height:1.5}.partner-table-scroll{overflow-x:auto}.partner-table{min-width:560px}.partner-table th:first-child{width:26%}.partner-table th:nth-child(2){width:24%}.partner-table td:nth-child(2){min-width:0}.partner-table th[scope=rowgroup]{vertical-align:top;background:#f3f0e7}.partner-table label{font-size:13px;display:block}.partner-table input[type=text],.partner-table textarea{width:100%;display:block;font:inherit;font-size:16px;margin:8px 0}.partner-table textarea{min-height:65px;resize:vertical}.topic-favorite{margin-top:15px;font-weight:400}.partner-table td{vertical-align:top}.speaking-examples{font-size:14px}@media(max-width:600px){.conversations{grid-template-columns:1fr;gap:12px}.question-practice input.question-blank,.given-question{width:65px}.question-practice{padding-left:22px}}@media print{.partner-table{min-width:0}.partner-table-scroll{overflow:visible}.partner-table{font-size:11px}}

.speaking-instructions{padding-left:25px}.speaking-instructions li{margin:20px 0}.speaking-model{background:#edf1e8;padding:18px 22px;margin:24px 0}.speaking-model p{margin-bottom:0}.simple-partner-table{min-width:600px;table-layout:fixed}.simple-partner-table caption{text-align:left;font-weight:600;padding:10px 0}.simple-partner-table th:nth-child(1){width:17%}.simple-partner-table th:nth-child(2){width:25%}.simple-partner-table th:nth-child(3){width:18%}.simple-partner-table th:nth-child(4){width:40%}.simple-partner-table td input[type=text]{min-width:0;margin:0}.simple-partner-table textarea{margin:0;min-height:70px}.simple-partner-table td label{margin:5px 0}.simple-partner-table td,.simple-partner-table th{padding:12px 10px;vertical-align:top}.partner-example{background:#f3f0e7;font-size:13px;color:var(--muted)}.speaking-question-help{margin:24px 0;font-size:14px}.speaking-question-help summary{font-weight:600;cursor:pointer}.speaking-question-help li{margin:15px 0}@media print{.simple-partner-table{min-width:0}.speaking-question-help{display:none}}

.table-heading-help{display:inline-block;font-size:13px;font-weight:400;margin-top:5px;line-height:1.5}

.video-listening-player{margin:24px 0}.video-listening-player video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#152923;border-radius:6px}.video-listening-player p{font-size:13px;color:var(--muted);margin-top:10px}@media print{.video-listening-player video{display:none}}
.shadow-panel{padding:22px;background:#edf1e8;border:1px solid #cad6c4;border-radius:6px;margin:24px 0;scroll-margin-top:100px}.shadow-panel h3{margin-top:0}.shadow-panel audio{width:100%;max-width:100%;margin:12px 0}.shadow-buttons,.shadow-speeds{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.shadow-speeds{align-items:center;font-size:13px}.shadow-panel button{font-size:13px}.shadow-panel button[aria-pressed=true]{background:#213e39;color:white}.shadow-panel button:disabled{opacity:.45;cursor:default}.shadow-panel details{font-size:14px;margin:14px 0}.shadow-panel summary{cursor:pointer;font-weight:650}.shadow-panel ol{padding-left:22px}.shadow-panel li{margin:6px 0}#shadow-status{font-size:13px;margin:10px 0 0}button.shadow-phrase{font:inherit;display:inline;line-height:inherit;color:inherit;background:transparent;border:0;border-radius:3px;padding:0;margin:0;text-align:left;cursor:pointer}button.shadow-phrase:hover{background:#edf1e8}.shadowing-on button.shadow-phrase.shadow-active{background:#f9e3a3;color:#213e39;box-shadow:0 2px 0 #c48c2b}.shadow-reading{scroll-margin-top:110px}.shadow-focus .topbar,.shadow-focus aside,.shadow-focus .hero,.shadow-focus .unit-meta,.shadow-focus .section-card:not(#shadowing-page),.shadow-focus footer,.shadow-focus #lesson-6>h3,.shadow-focus #lesson-6>ol,.shadow-focus #lesson-6>.sample,.shadow-focus #lesson-6>.section-end{display:none}.shadow-focus .layout{display:block;max-width:950px}.shadow-focus #lesson-6{margin-top:20px}.shadow-focus .shadow-panel{position:sticky;top:0;z-index:4}.shadow-focus .shadow-panel details:not([open]){display:none}@media print{.shadow-panel{display:none}button.shadow-phrase{display:inline!important;background:transparent!important;box-shadow:none!important}}

.shadow-exercise{border-top:2px solid var(--line);margin-top:35px;padding-top:12px;scroll-margin-top:100px}.shadow-help{background:#fffefb;padding:12px 15px;border-radius:4px}.shadow-help>button{margin-top:12px}.shadow-help h4{margin-top:18px}.shadow-focus #lesson-6>.reading-text{display:none}.shadow-focus .shadow-exercise{border-top:0;margin-top:0;padding-top:0}

.intonation-example{padding:18px 22px;background:#edf1e8;border-left:3px solid #88a183;margin:24px 0}.intonation-example p{margin:8px 0}.intonation-item{border:1px solid var(--line);border-radius:6px;padding:18px 22px;margin:24px 0;min-width:0}.intonation-item legend{font-weight:700;padding:0 8px}.intonation-item p{margin:8px 0}.intonation-choices{display:flex;gap:20px;flex-wrap:wrap}.intonation-choices label{padding:8px 12px;border:1px solid var(--line);border-radius:5px;cursor:pointer}.dictation-question-label{display:block;margin-top:18px;font-size:14px}.dictation-question-label input{display:block;margin-top:10px}.intonation-feedback{font-size:13px}.intonation-feedback:empty{display:none}.intonation-correct{color:#225b32;background:#e1f2e3;padding:8px 12px;border-radius:4px}.intonation-incorrect{color:#8b294d;background:#f9dfe8;padding:8px 12px;border-radius:4px}.intonation-choices label:has(input:checked){border-color:#637d70;background:#edf1e8}#intonation-status{font-size:14px}
#dictation-practice{scroll-margin-top:105px;outline:none}#dictation-listening{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:16px;background:#edf1e8;border-radius:6px}#dictation-listening audio{flex:1;min-width:220px}#dictation-progress{margin:20px 0 12px}.dictation-navigation{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;margin:18px 0}.dictation-navigation button:disabled{opacity:.45;cursor:default}#next-dictation{background:#213e39;color:white}#dictation-practice [hidden]{display:none!important}.dictation-result-row{padding:15px 0;border-bottom:1px solid var(--line);font-size:14px}.dictation-result-row p{margin:0 0 8px}.intonation-example summary{font-weight:700;cursor:pointer}@media(max-width:600px){.intonation-item{padding:15px}.dictation-navigation{gap:8px}.dictation-navigation button{font-size:13px;padding:8px 10px}#dictation-listening audio{min-width:100%;width:100%}}@media print{#dictation-practice .intonation-item[hidden]{display:block!important}#dictation-listening,.dictation-navigation,#dictation-results{display:none!important}}
.pages-enabled .unit-page[hidden],.pages-enabled .speaking-step-panel[hidden]{display:none!important}.unit-page{outline:none;scroll-margin-top:105px}.page-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:22px 0}.page-toolbar p{margin:0;font-size:12px;font-weight:700;letter-spacing:.6px;color:var(--muted)}#unit-contents-toggle{display:none}.page-navigation{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin:24px 0 45px;padding-top:22px;border-top:1px solid var(--line)}.page-navigation a{text-decoration:none;border:1px solid #b8c5b9;border-radius:5px;padding:12px 16px;font-size:14px;background:#fffefb}.page-navigation a.page-next{background:var(--ink);color:white;margin-left:auto}.review-page-link{display:block;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}.unit-finish h1{font:36px Georgia,serif}.speaking-step-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:25px 0;scroll-margin-top:110px}.speaking-step-tabs button{font-size:13px}.speaking-step-tabs button[aria-selected=true]{background:var(--ink);color:white}.speaking-step-navigation{display:flex;justify-content:space-between;gap:12px;margin:28px 0}.pages-enabled aside nav a{font-size:13px;padding:7px 0}.pages-enabled aside{padding-top:24px}.pages-enabled .hero{min-height:530px;padding-top:30px}.pages-enabled .unit-page>.section-card{margin-bottom:20px}.shadow-focus .page-toolbar,.shadow-focus .page-navigation{display:none}.shadow-focus #shadowing-page{margin-top:20px}@media(max-width:760px){.pages-enabled aside{display:none}.pages-enabled.contents-open aside{display:block}.pages-enabled aside nav{display:block;overflow:visible}.pages-enabled aside nav a{padding:9px 0}.pages-enabled aside .progress-box{display:block}.pages-enabled .page-toolbar{position:sticky;top:72px;background:var(--paper);z-index:4;padding:14px 0}.pages-enabled #unit-contents-toggle{display:block;font-size:12px;padding:7px 10px}.page-toolbar p{font-size:11px;text-align:right}.pages-enabled .unit-page,.pages-enabled .speaking-step-tabs{scroll-margin-top:145px}.page-navigation a{font-size:13px}.page-navigation{align-items:stretch}.page-navigation a{flex:1}.speaking-step-tabs{display:grid;grid-template-columns:1fr}.speaking-step-tabs button{text-align:left}.shadow-focus .page-toolbar{display:none}}@media print{.page-toolbar,.page-navigation,.speaking-step-tabs,.speaking-step-navigation,aside,#unit-finished{display:none!important}.pages-enabled .unit-page[hidden],.pages-enabled .speaking-step-panel[hidden]{display:block!important}.pages-enabled .unit-page{break-before:page}.pages-enabled #page-1{break-before:auto}}

/* Track 1: listening with word tiles. */
.track1-rebuild{padding:24px;border:1px solid #cbd8d1;border-radius:14px;background:#f7faf7;scroll-margin-top:24px;margin-bottom:30px}
.track1-rebuild h3{margin-top:0}.track1-rebuild li{margin-bottom:6px}.track1-rebuild audio{display:block;width:100%;margin:15px 0}
.track1-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:16px 0}.track1-controls button,.track1-tile{font:inherit;cursor:pointer;border:1px solid #b6c9bf;border-radius:8px;padding:10px 15px;background:white;color:#203f38}
.track1-controls #track1-check,.track1-controls #track1-next{background:#24473d;color:white}.track1-controls button:disabled{opacity:.45;cursor:default}.track1-controls button:focus-visible,.track1-tile:focus-visible{outline:3px solid #c07742;outline-offset:3px}
.track1-words{display:flex;flex-wrap:wrap;gap:9px;margin:12px 0;min-height:55px}.track1-built{border:2px dashed #b6c9bf;border-radius:10px;padding:14px;min-height:90px;background:white}.track1-built .track1-tile{background:#e2eee7}.track1-tile:hover{background:#edf4ef}.track1-placeholder,.track1-hint{color:#52665d;font-size:.95rem}.track1-placeholder{align-self:center}.track1-hint{margin-bottom:5px}.track1-navigation{justify-content:space-between;border-top:1px solid #d4dfd8;padding-top:15px}.track1-correct{color:#236d40;font-weight:700}.track1-retry{color:#91435a}.track1-revealed{padding:12px;background:#edf1e7;border-radius:8px}#track1-feedback{min-height:28px}
@media(max-width:600px){.track1-rebuild{padding:16px}.track1-controls button,.track1-tile{padding:10px 12px}.track1-navigation button{flex:1}}

.activity-check-actions{margin:22px 0}.activity-check-actions button{font:inherit;font-weight:700;padding:11px 18px;background:#24473d;color:white;border:1px solid #24473d;border-radius:8px;cursor:pointer}.activity-check-actions button:focus-visible{outline:3px solid #c07742;outline-offset:3px}.activity-answer-feedback{display:block;font-size:.95rem;font-weight:700;margin:7px 0}.activity-answer-feedback:empty{display:none}.answer-correct{color:#236d40}.answer-incorrect{color:#91435a}.answer-missing{color:#655534}.question-blank[aria-invalid=true]{border-color:#b75e7b;background:#fff1f5}#lesson-5 ol>li{padding-bottom:10px}