:root{--paper:#f7f5ef;--ink:#203c38;--muted:#6e7972;--line:#dedfd5;--green:#163d39;--gold:#bc9453;--white:#fffefa;--red:#9d3d35;--soft:#e8eee6}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Segoe UI,Arial,sans-serif;line-height:1.5}button,a,input,select{touch-action:manipulation}button,select{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.48}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #c0923e;outline-offset:4px}a{color:inherit}.skip{position:absolute;left:12px;top:-80px;background:white;padding:12px;z-index:10}.skip:focus{top:12px}.topbar{height:96px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 4vw;gap:20px;background:var(--white)}.brand{display:flex;align-items:center;gap:14px;text-decoration:none;font-family:Georgia,serif;font-size:28px;line-height:1.1}.brand small{display:block;font:9px Segoe UI,sans-serif;letter-spacing:2.4px;margin-top:7px}.monogram{display:flex;align-items:center;justify-content:center;position:relative;border:1px solid var(--green);width:50px;height:56px;font:23px Georgia,serif}.monogram span{position:absolute;bottom:-6px;background:var(--white);padding:0 5px;color:var(--gold);font-size:15px}.topnote{font-size:13px;color:var(--muted)}.level{border:1px solid #c9d4c8;border-radius:20px;padding:6px 15px;font-size:12px}.shell{max-width:1540px;margin:auto;display:grid;grid-template-columns:270px 1fr;min-height:calc(100vh - 96px)}.sidebar{border-right:1px solid var(--line);padding:40px 27px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:700;color:var(--muted)}.sidebar h2{font:32px/1.16 Georgia,serif;margin:20px 0 12px}.muted{color:var(--muted)}.sidebar p{font-size:12px}.stats{margin-top:32px;display:flex;justify-content:space-between;align-items:center;font-size:10px}.stats strong{font-size:16px}.stats span{color:var(--muted)}progress{appearance:none;width:100%;height:5px;display:block;margin:10px 0;background:#dedfd5;border:0}progress::-webkit-progress-bar{background:#dedfd5}progress::-webkit-progress-value{background:var(--green)}progress::-moz-progress-bar{background:var(--green)}.small{font-size:12px}.sidebar #sceneNav{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:26px 0 18px}.scene-button{background:transparent;border:1px solid var(--line);height:40px;border-radius:6px;color:var(--muted);font-size:12px}.scene-button.done{background:var(--soft);border-color:#ccd7c9;color:var(--green)}.scene-button.current{background:var(--green);border-color:var(--green);color:white;box-shadow:0 0 0 3px #163d3915}.legend{display:flex;gap:14px;font-size:10px;color:var(--muted)}.sidebar-bottom{margin-top:40px;border-top:1px solid var(--line);padding-top:15px}.sidebar-bottom p{font-size:11px}.textbutton{border:0;background:none;color:var(--green);padding:4px 0;text-align:left;font-size:12px;text-decoration:underline;text-underline-offset:4px}main{min-width:0;padding:38px 45px 0}.intro{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:34px}.intro h1{font:clamp(34px,3.8vw,51px)/1.1 Georgia,serif;letter-spacing:-1.4px;font-weight:400;margin:16px 0 14px}.intro p{font-size:13px;color:var(--muted);margin:0}.story-meta{font-size:11px;display:grid;gap:10px;color:var(--muted);padding-left:22px;border-left:1px solid var(--line)}.story-meta span{white-space:nowrap}.lesson-heading{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:24px 0 20px;gap:12px}.lesson-heading h2{font:25px Georgia,serif;margin:6px 0 0}.quiet{background:transparent;border:1px solid #cdd3c8;border-radius:6px;color:var(--ink);padding:10px 14px;font-size:12px}.lesson-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;align-items:start}.visual{min-width:0}.image-frame{position:relative;border-radius:9px 9px 0 0;overflow:hidden;background:#e6e4da;aspect-ratio:3/2}.image-frame img{width:100%;height:100%;display:block;object-fit:contain}.image-label{position:absolute;left:17px;bottom:14px;background:#18322dce;color:#fffdf4;font-size:8px;letter-spacing:2px;padding:5px 9px;border-radius:3px}#imageHidden{height:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;padding:25px;font:20px Georgia,serif;background:#dfe5da}#imageHidden span{display:block;font:12px Segoe UI,sans-serif;color:var(--muted);margin-top:12px}.audio-card{background:var(--white);border:1px solid var(--line);border-top:0;padding:20px;border-radius:0 0 9px 9px}.audio-top{display:flex;align-items:center;gap:10px}.audio-top strong{font-size:13px}.audio-top p{margin:2px 0;font-size:10px;color:var(--muted)}.audio-icon{height:34px;width:34px;border-radius:50%;background:var(--soft);display:grid;place-items:center;font-size:22px}.speed{margin-left:auto;font-size:9px;color:var(--muted)}.speed select{display:block;border:0;background:var(--paper);color:var(--green);border-radius:4px;font-size:12px;padding:2px 5px}audio{display:block;width:100%;height:40px;margin:15px 0 8px}#audioError{font-size:12px;color:var(--red)}.question-card{background:var(--white);border:1px solid var(--line);border-radius:9px;padding:25px;min-width:0}.step{font-size:9px;font-weight:700;letter-spacing:1.6px;display:flex;align-items:center;gap:10px}.step span{font-family:Georgia,serif;font-size:16px;color:var(--gold);letter-spacing:0}.question-card>.small{margin:10px 0 20px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font:22px/1.35 Georgia,serif;margin:0 0 20px;padding:0;width:100%}#options{display:grid;gap:9px}.option{position:relative;display:flex;align-items:center;gap:11px;border:1px solid var(--line);border-radius:6px;padding:12px 13px;font-size:13px;cursor:pointer;min-height:48px}.option input{position:absolute;opacity:0;width:20px;height:20px}.option:has(input:focus-visible){outline:3px solid var(--gold)}.option .letter{font-size:11px;display:grid;place-items:center;width:26px;height:26px;border:1px solid #d8ddd2;border-radius:50%;flex-shrink:0;color:var(--muted)}.option:has(input:checked){border-color:var(--green);background:#eef2eb}.option.correct{border-color:#4c7753;background:#edf4e9}.option.wrong{border-color:#ba8078;background:#faf0ed}.primary{background:var(--green);color:white;border:1px solid var(--green);border-radius:6px;padding:12px 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button[aria-selected=true]{border-color:var(--green);color:var(--green)}.study-label{font-size:11px;color:var(--muted);margin-top:20px}.transcript{font:19px/1.85 Georgia,serif;max-width:850px;margin-bottom:8px}.transcript strong{font-weight:700;color:#215e50;background:#dce7d4;border-radius:2px;padding:0 2px}.grammar-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}.grammar-item{background:var(--white);border:1px solid var(--line);border-radius:6px;padding:14px}.grammar-item h3{font-size:11px;letter-spacing:.7px;margin:0 0 7px}.grammar-item q{font:18px Georgia,serif}.grammar-item p{font-size:12px;color:var(--muted)}.grammar-item a{font-size:10px;text-underline-offset:3px}.bottom-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:24px 0 42px}.bottom-nav>span{font-size:11px;color:var(--muted)}footer{border-top:1px solid var(--line);font-size:9px;letter-spacing:1.5px;padding:22px 0;color:var(--muted);display:flex;justify-content:space-between;gap:15px}footer span{letter-spacing:0}.finish{background:#dce8d6;border:1px solid #bacfb3;padding:22px;border-radius:9px;margin-top:25px}.finish strong{font:23px Georgia,serif}.finish p{font-size:13px}#notice{background:#fff0cf;border:1px solid #d7bb80;padding:12px;font-size:13px;margin-bottom:20px}[hidden]{display:none!important}@media(min-width:1500px){main{padding-left:55px;padding-right:55px}}@media(max-width:1100px){.shell{grid-template-columns:210px 1fr}.sidebar{padding:30px 20px}main{padding:30px 25px 0}.intro h1{font-size:38px}.story-meta{display:none}.lesson-grid{gap:18px}.question-card{padding:20px}legend{font-size:20px}.topnote{display:none}.grammar-list{grid-template-columns:1fr}}@media(max-width:800px){.topbar{height:78px;padding:0 22px}.brand{font-size:25px}.monogram{width:42px;height:47px}.shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line);padding:20px 22px;display:grid;grid-template-columns:1fr auto;column-gap:16px}.sidebar>.eyebrow,.sidebar>.muted,.sidebar>.small,.legend,.sidebar-bottom{display:none}.sidebar h2{font:20px Georgia,serif;margin:0}.sidebar h2 br{display:none}.stats{margin:0;gap:8px}.stats span{display:none}.sidebar progress{grid-column:1/-1;margin-bottom:0}#sceneNav{grid-column:1/-1!important;grid-template-columns:repeat(12,1fr)!important;gap:5px!important;margin:16px 0 0!important}.scene-button{height:32px;font-size:10px}.intro{margin-bottom:26px}.intro h1{font-size:39px}main{padding:28px 22px 0}.lesson-grid{grid-template-columns:1fr}.question-card{padding:24px}.image-frame{aspect-ratio:3/2}.grammar-list{grid-template-columns:1fr}.study-card{padding:20px}.study-top{align-items:flex-start;flex-direction:column;gap:6px}.bottom-nav button{padding:11px;font-size:11px}.bottom-nav>span{white-space:nowrap}.transcript{font-size:18px}.intro p{font-size:12px}.lesson-heading h2{font-size:23px}.lesson-heading .quiet{font-size:10px;padding:9px}.tabs{gap:18px}.tabs button{font-size:11px}footer span{display:none}}@media(prefers-reduced-motion:no-preference){button,.option{transition:background-color .15s,border-color .15s}}

/* Mobile reset access */
@media(max-width:800px){.sidebar-bottom{display:block;grid-column:1/-1;margin-top:12px;padding-top:8px}.sidebar-bottom p{display:none}}

/* Spoken word */
.transcript .spoken-word.is-speaking{color:#c3262f!important;background:#fde4e1;border-radius:3px;text-decoration:underline;text-decoration-color:#c3262f;text-underline-offset:4px}

.reading-controls{position:sticky;top:8px;z-index:2;background:#f8f7f0f5;border:1px solid #d5dbce;border-radius:8px;padding:12px 14px;margin:18px 0 8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;box-shadow:0 4px 12px #143d3910}.reading-controls .primary{padding:9px 14px}.reading-controls .quiet{padding:9px 12px}.reading-controls small{font-size:10px;color:var(--muted)}.practice-entry{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:22px;flex-wrap:wrap}.practice-entry span{font-size:11px;color:var(--muted)}#practiceDialog{color:var(--ink);background:var(--white);border:1px solid #d1d8ca;border-radius:19px;padding:25px;width:min(640px,calc(100% - 24px));max-height:calc(100dvh - 32px);overflow-y:auto;box-shadow:0 20px 80px #123d3950}#practiceDialog::backdrop{background:#122b27b8;backdrop-filter:blur(4px)}.practice-header{display:flex;align-items:center;justify-content:space-between;gap:10px}.practice-header>div{display:flex;gap:8px}.practice-header .quiet{padding:7px 10px;font-size:11px;min-height:36px}.practice-guide{display:flex;align-items:center;gap:17px;margin:15px 0}.practice-mascot{flex:0 0 104px;width:104px;height:108px}.practice-bubble{position:relative;border:1px solid #d5dece;background:#f1f5ec;border-radius:14px;padding:13px 16px;font-size:12px}.practice-bubble strong{font-size:11px}.practice-bubble p{margin:7px 0 0}.practice-guide.celebrate .practice-bubble{background:#e5f2de}.practice-guide.retry .practice-bubble{background:#fff3dc}.practice-sentence{font:24px/1.5 Georgia,serif;margin:18px 0;overflow-wrap:anywhere}.practice-choices{display:grid;gap:10px;margin:18px 0}.practice-choice{font:16px/1.4 Segoe UI,Arial,sans-serif;text-align:left;background:var(--white);color:var(--ink);border:1px solid var(--line);border-bottom-width:3px;border-radius:10px;padding:13px 17px;min-height:48px;cursor:pointer}.practice-choice[aria-pressed=true]{border-color:#508676;background:#e9f2e7}.practice-choice:disabled{opacity:1}.practice-choice.answer-correct{border-color:#4b8653;background:#ecf6e5}.practice-choice.answer-wrong{border-color:#bd796f;background:#fff1ed}.practice-tiles{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;padding:20px 0}.word-tile{font-size:16px;background:#fffefa;color:var(--ink);border:1px solid #cfd5c7;border-bottom:3px solid #c1c9b8;border-radius:9px;min-height:44px;padding:8px 13px}.word-tile:disabled{opacity:.24}.practice-answer{border:1px dashed #b8c8ac;border-radius:10px;min-height:74px;padding:12px;display:flex;gap:8px;flex-wrap:wrap;align-content:flex-start;background:#f3f5ed}.practice-answer:empty:before{content:'Toque nas palavras para montar a frase.';font-size:12px;color:var(--muted);padding:10px}.practice-answer .word-tile{background:#e9f1e1}#practiceHeading{font:26px/1.25 Georgia,serif;margin:18px 0 10px}#practiceCounter{margin:0}#practiceFeedback{border-radius:9px;padding:16px;margin:18px 0;background:#eaf4e2;border:1px solid #c6ddba;font-size:13px}#practiceFeedback.incorrect{background:#fff1e9;border-color:#e8c8b9}#practiceFeedback strong{font-size:16px}#practiceFeedback .model-answer{font:19px/1.5 Georgia,serif;margin:12px 0}#practiceFeedback a{font-size:11px}.practice-footer{display:flex;justify-content:flex-end;border-top:1px solid var(--line);padding-top:18px;margin-top:18px}.practice-footer .primary{min-width:190px;min-height:46px}.practice-summary{text-align:center;padding:20px 5px}.practice-summary>span{display:block;font-size:55px;color:var(--gold)}.practice-summary h2{font:30px Georgia,serif}.practice-summary p{font-size:14px}@media(prefers-reduced-motion:no-preference){.practice-guide.celebrate .practice-mascot{animation:pip-hop .5s ease}.practice-choice:active,.word-tile:active{transform:translateY(2px)}@keyframes pip-hop{0%,100%{transform:translateY(0) rotate(0)}40%{transform:translateY(-9px) rotate(-6deg)}70%{transform:translateY(-3px) rotate(3deg)}}}@media(max-width:600px){#practiceDialog{padding:18px;border-radius:14px}.practice-guide{gap:10px;margin:12px 0}.practice-mascot{flex-basis:76px;width:76px;height:83px}.practice-mascot svg{width:76px;height:83px}.practice-bubble{padding:10px 12px;font-size:11px}.practice-bubble strong{font-size:10px}#practiceHeading{font-size:23px}.practice-sentence{font-size:22px}.practice-choice{font-size:15px;padding:12px}.practice-footer .primary{width:100%}.word-tile{font-size:15px;padding:8px 11px}.reading-controls{top:5px;gap:8px;padding:10px}.reading-controls small{width:100%}}

.writing-label{display:block;font-size:12px;font-weight:600;margin:18px 0 8px}.practice-writing{display:block;resize:vertical;width:100%;min-height:100px;background:#fffefa;border:2px solid #b8c8ac;border-radius:10px;padding:14px;color:var(--ink);font:18px/1.6 Segoe UI,Arial,sans-serif}.practice-writing:focus{outline:3px solid #c0923e;outline-offset:3px}.practice-writing:disabled{color:#56604e;background:#f4f4ed}

/* Minimal Sherlock learning path, with original character and tactile controls. */
:root{--paper:#fff;--ink:#263d36;--muted:#78877f;--line:#e5eae5;--green:#287b59;--gold:#d8a844;--soft:#f2f6f0}
body{font-family:Segoe UI,Arial,sans-serif;background:#fff;color:#263d36}.shell{display:block;max-width:1200px}.sidebar{display:none}.topbar{height:80px;background:#fff;border-bottom:2px solid #eef1ec;max-width:1200px;margin:auto;padding:0 28px}.brand{font-family:Segoe UI,Arial,sans-serif;font-size:24px;font-weight:750;letter-spacing:-.7px}.brand small{letter-spacing:2px;font-size:8px;font-weight:600;color:#7b8e7e}.monogram{background:#eaf4e7;color:#287b59;border:0;border-radius:15px;width:45px;height:45px;font:700 21px Georgia,serif}.monogram span{display:none}.topnote{font-size:12px;color:#849186}.level{background:#f5f8f2;border:0;font-weight:700;color:#64765b}.top-trail{margin-left:auto}.trail-view{max-width:620px;margin:0 auto;background:#fff;position:relative;padding:0 24px 24px}.trail-masthead{padding:30px 0 20px}.trail-kicker{font-size:10px;letter-spacing:1.6px;font-weight:750;color:#7c8e7e}.trail-masthead h1{font-size:26px;letter-spacing:-.7px;line-height:1.2;margin:9px 0 6px;font-weight:750}.trail-masthead p{font-size:14px;color:#87968c;margin:0}.trail-unit{position:relative;background:#287b59;color:white;padding:20px 22px;border-radius:17px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px}.trail-unit small{font-size:10px;letter-spacing:1.6px;font-weight:750;color:#d5eddf}.trail-unit h2{font-size:19px;line-height:1.2;margin:7px 0 9px;font-weight:750}.trail-unit div>span{font-size:12px;color:#e0f1e7}.unit-icon{font:50px/1 Georgia,serif;color:#d7eacc;transform:rotate(-20deg)}.trail-unit progress{flex:1 0 100%;height:8px;border-radius:8px;margin:0;background:#1f664a;overflow:hidden}.trail-unit progress::-webkit-progress-bar{background:#1f664a}.trail-unit progress::-webkit-progress-value{background:#b9e67f;border-radius:8px}.trail-unit progress::-moz-progress-bar{background:#b9e67f}.trail-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 4px;font-size:12px;color:#859087}.trail-link{border:0;background:none;color:#287b59;font:700 12px Segoe UI,sans-serif;min-height:44px}.trail-road{max-width:440px;margin:0 auto;position:relative;padding-bottom:12px}.trail-block{position:relative;padding:12px 0 0;background:none}.trail-chapter{text-align:center;display:flex;align-items:center;gap:18px;color:#a3aea5;font-size:10px;font-weight:700;letter-spacing:1.5px;margin:0 0 42px}.trail-chapter::before,.trail-chapter::after{content:'';height:2px;background:#eef1ec;flex:1}.trail-stop{position:relative;display:flex;align-items:center;flex-direction:column;width:120px;height:138px;margin-left:calc(var(--stop-x) - 60px);text-align:center}.trail-stop .scene-button{position:relative;display:grid;place-items:center;width:78px;height:70px;flex-shrink:0;border-radius:50%;border:0;border-bottom:7px solid #cbd4cb;background:#e6ece5;color:#acb9ab;box-shadow:none;padding:16px;font:700 28px/1 Segoe UI,sans-serif;transition:transform .1s,border-bottom-width .1s,background-color .15s}.trail-stop .scene-button.current{background:#2f9164;color:white;border-bottom-color:#206444;box-shadow:0 0 0 7px #fff,0 0 0 11px #dbe9d9}.trail-stop .scene-button.done{background:#e8b648;color:white;border-bottom-color:#c59127}.trail-stop .scene-button.current.done{box-shadow:0 0 0 7px #fff,0 0 0 11px #f4e7bd}.trail-stop .scene-button:active{transform:translateY(5px);border-bottom-width:2px}.trail-stop .scene-button:hover{filter:brightness(1.03)}.trail-symbol{display:grid;place-items:center;width:32px;height:32px;pointer-events:none}.trail-symbol svg{width:30px;height:30px}.trail-stop-label{font-size:10px;font-weight:750;letter-spacing:.8px;color:#89958b;margin-top:15px}.trail-stop.current .trail-stop-label{color:#287b59}.trail-stop-meta{font-size:10px;color:#7e8c7e;margin-top:3px}.trail-flag{position:absolute;top:-37px;left:50%;transform:translateX(-50%);font-size:10px;font-weight:800;letter-spacing:.7px;border:2px solid #e5ebe1;border-radius:10px;background:#fff;color:#2b885b;padding:7px 12px;white-space:nowrap}.trail-flag::after{content:'';position:absolute;width:9px;height:9px;background:#fff;border-right:2px solid #e5ebe1;border-bottom:2px solid #e5ebe1;left:calc(50% - 6px);bottom:-7px;transform:rotate(45deg)}.trail-detective{position:absolute;width:88px;height:94px;right:111px;top:-10px;pointer-events:none}.trail-detective svg{width:88px;height:94px}.trail-start-card{position:absolute;z-index:8;top:98px;width:278px;border:2px solid #dce6d7;border-radius:17px;background:#fff;padding:18px;text-align:left;box-shadow:0 9px 28px #25433020}.trail-start-card h3{margin:0;color:#2a674b;font-size:18px;font-weight:750}.trail-start-card p{font-size:13px;color:#76816f;margin:8px 0 15px;line-height:1.5}.trail-primary{border:0;border-bottom:4px solid #1c6243;border-radius:12px;background:#2f9164;color:#fff;min-height:48px;padding:12px 20px;font:750 12px/1.3 Segoe UI,Arial,sans-serif;letter-spacing:.4px}.trail-primary:active{transform:translateY(3px);border-bottom-width:1px}.trail-start-card .trail-primary{width:100%}.trail-ending{text-align:center;margin:12px 0 20px;padding:24px 18px;background:#f5f8f1;border-radius:18px}.trail-ending>span{display:block;color:#cfad51;font-size:35px}.trail-ending h2{font-size:20px;margin:5px 0 8px;font-weight:750}.trail-ending p{font-size:12px;color:#83917b}.trail-footer{text-align:center;font-size:11px;color:#9aa398}.trail-legend{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin:18px 0}.trail-footer summary{padding:12px;min-height:44px}.trail-reset{min-height:44px;border:0;background:none;color:#809077;text-decoration:underline;font:inherit}.trail-locate{position:fixed;z-index:9;right:max(18px,calc((100vw - 620px)/2 + 18px));bottom:22px;background:#fff;color:#2d865d;border:2px solid #dce6d7;border-bottom:4px solid #c9d7c4;border-radius:14px;padding:12px 17px;font:750 12px Segoe UI,sans-serif;box-shadow:0 6px 22px #1a3a2920}.lesson-backbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 0 20px}.lesson-backbar span{font-size:11px;color:#95a08f}.lesson-view{padding:24px 28px 0!important;max-width:1050px;margin:auto}.lesson-view .intro{display:none}.lesson-heading{border-top:0;padding-top:6px}.lesson-heading h2{font:750 26px/1.2 Segoe UI,Arial,sans-serif}.lesson-grid{gap:24px}.question-card{border:0;padding:16px 4px;background:#fff}.question-card legend{font:700 23px/1.35 Segoe UI,Arial,sans-serif}.option{border:2px solid #e5e9e1;border-bottom:4px solid #e0e5dc;border-radius:13px;font-size:15px;padding:14px;min-height:56px}.option:has(input:checked){border-color:#87bd9a;background:#edf6ed}.primary{border:0;border-bottom:4px solid #1e6846;border-radius:12px;background:#2f9164;font-size:13px;font-weight:750;padding:14px 20px;letter-spacing:.3px;min-height:48px}.primary:hover:not(:disabled){background:#338b61}.primary:active:not(:disabled){transform:translateY(3px);border-bottom-width:1px}.quiet{border:2px solid #e4e9df;border-bottom:4px solid #dce4d6;border-radius:12px;font-size:12px;font-weight:700;padding:9px 13px}.quiet:active{transform:translateY(2px)}.study-card{background:#f7f9f3;border:0;border-radius:17px}.audio-card{border:2px solid #e9ede4;border-top:0;background:#fff}.image-frame{border-radius:16px 16px 0 0}.reading-controls{box-shadow:none;background:#fafcf7;border-color:#e0e8d9;border-radius:13px}.bottom-nav{padding:20px 0;border-top:2px solid #f0f2ec}.finish{border:0;border-radius:16px}.practice-choice{border:2px solid #e1e7dc;border-bottom:4px solid #d9e1d3;border-radius:13px;font-size:16px;padding:15px;min-height:54px}.word-tile{border:2px solid #e0e6dc;border-bottom:4px solid #d2ddc9;background:#fff;border-radius:12px;min-height:46px;padding:9px 14px}.practice-answer{border:0;border-top:2px solid #e4e9df;border-bottom:2px solid #e4e9df;border-radius:0;background:white;min-height:82px}.practice-answer .word-tile{background:#f2f7ed}.practice-choice[aria-pressed=true]{background:#edf6ea;border-color:#85b69a}.practice-choice.answer-correct{background:#edf7e9;border-color:#6aa875}#practiceDialog{border:0;background:#fff;border-radius:22px;padding:26px 32px;width:min(680px,calc(100% - 24px));box-shadow:0 15px 80px #163b282e;max-height:calc(100dvh - 28px)}#practiceDialog::backdrop{background:#20362c55;backdrop-filter:blur(2px)}#practiceProgress{height:12px;border-radius:12px;overflow:hidden;background:#e8eee4;margin:22px 0}#practiceProgress::-webkit-progress-bar{background:#e8eee4}#practiceProgress::-webkit-progress-value{background:#45a56c;border-radius:12px}#practiceProgress::-moz-progress-bar{background:#45a56c}.practice-guide{margin:10px 0 22px}.practice-bubble{background:#fff;border:2px solid #e5ebdf;border-radius:15px}.practice-mascot{flex-basis:80px;width:80px;height:86px}.practice-mascot svg{width:80px;height:86px}#practiceHeading{font:750 26px/1.3 Segoe UI,Arial,sans-serif}.practice-sentence{font:500 22px/1.6 Segoe UI,Arial,sans-serif}.practice-footer{position:sticky;bottom:-26px;background:#fff;border-top:2px solid #edf0e8;padding:18px 0 4px;margin-top:24px;z-index:3}.practice-writing{border:2px solid #dce6d3;border-bottom:4px solid #d3dfc8;border-radius:14px;font-size:18px;background:#fcfdf9}#practiceFeedback{border:0;border-radius:15px;background:#e7f4df;padding:18px}#practiceFeedback.incorrect{background:#fff0e9}.practice-summary h2{font:750 28px Segoe UI,sans-serif}.practice-summary>span{color:#d9ad44}#sceneReward{width:min(430px,calc(100% - 32px));border:0;border-radius:24px;padding:30px;text-align:center;color:#2c4838;background:#fff;box-shadow:0 20px 80px #18392940}#sceneReward::backdrop{background:#20362c66;backdrop-filter:blur(3px)}.reward-close{position:absolute;right:14px;top:10px;border:0;background:none;color:#8d9b86;min-width:44px;min-height:44px;font-size:19px}.reward-art{position:relative;height:160px;display:grid;place-items:center;background:radial-gradient(ellipse,#fff1bf,transparent 65%)}.reward-art>span{font-size:106px;color:#e3b447;text-shadow:0 7px 0 #c18c27;transform:rotate(-8deg)}.reward-art i{position:absolute;color:#65a16f;font-size:22px;font-style:normal}.reward-art i:nth-child(2){left:15%;top:20%}.reward-art i:nth-child(3){right:15%;top:30%;color:#dfb146}.reward-art i:nth-child(4){left:23%;bottom:17%;color:#d8a94e}.reward-kicker{color:#85a571;font-size:10px;letter-spacing:1.5px;font-weight:800}#sceneReward h2{font-size:26px;font-weight:750;line-height:1.2;margin:14px 0}#sceneReward p{font-size:14px;color:#8a9681;line-height:1.7;margin-bottom:24px}#sceneReward .trail-primary{width:100%}
@media(max-width:800px){.topbar{height:70px;padding:0 20px}.topnote{display:none}.level{display:none}.brand{font-size:22px}.monogram{width:38px;height:40px;font-size:19px}.trail-view{padding:0 20px 24px}.trail-masthead{padding:23px 0 18px}.trail-masthead h1{font-size:23px}.trail-unit{padding:17px 20px}.trail-unit h2{font-size:18px}.trail-road{max-width:390px}.trail-stop{height:132px}.trail-detective{right:101px;width:79px;height:86px}.trail-detective svg{width:79px;height:86px}.lesson-view{padding:18px 20px 0!important}.lesson-grid{grid-template-columns:1fr}.lesson-heading h2{font-size:23px}.question-card{padding:15px 0}.lesson-backbar{padding-bottom:14px}.top-trail{font-size:10px}.trail-masthead p{font-size:13px}.trail-ending{margin-top:0}.trail-block{padding-top:5px}}
@media(max-width:480px){#practiceDialog{width:100%;height:100dvh;max-height:100dvh;border-radius:0;margin:0;padding:20px 22px;box-shadow:none}.practice-footer{bottom:-20px;padding-top:14px;min-height:82px;align-items:center}.practice-footer .primary{width:100%}.practice-header .eyebrow{font-size:9px}#practiceHeading{font-size:24px}.practice-bubble strong{font-size:10px}.practice-bubble p{font-size:12px}.practice-guide{gap:12px}.practice-tiles{gap:8px}.practice-header{gap:6px}.practice-header .quiet{font-size:10px;padding:6px 8px}.trail-start-card{width:min(278px,calc(100vw - 28px))}}
@media(max-width:360px){.trail-view{padding-left:16px;padding-right:16px}.trail-stop .scene-button{width:72px;height:66px}.trail-detective{right:96px;width:65px}.trail-detective svg{width:65px}.trail-masthead h1{font-size:21px}.trail-unit{padding:16px}.unit-icon{font-size:40px}.brand small{font-size:7px}.lesson-backbar span{font-size:9px}}
@media(prefers-reduced-motion:no-preference){#sceneReward[open] .reward-art>span{animation:case-pop .45s ease-out}#sceneReward[open] .reward-art i{animation:case-spark .55s ease-out}@keyframes case-pop{0%{transform:scale(.5) rotate(-20deg)}70%{transform:scale(1.08) rotate(-5deg)}100%{transform:scale(1) rotate(-8deg)}}@keyframes case-spark{from{transform:scale(.4)}to{transform:scale(1)}}}

/* Approved parchment Sherlock theme; same tactile path interactions. */
body.trail-mode{background:#f2e7d0}.trail-mode .topbar{background:#f7edda;border-color:#ddd0b5}.trail-mode .brand{color:#183c2d}.trail-mode .monogram{background:#e2d7bd;color:#244631}.trail-mode .brand small{color:#837b64}.trail-view{background:#f3e7cf url('/assets/london-parchment.webp') center top/100% auto repeat-y;border-radius:0;padding-top:1px}.trail-masthead{background:linear-gradient(#f3e7cff0,#f3e7cf55);margin:0 -24px;padding:25px 24px 20px}.trail-kicker{color:#7c7359}.trail-masthead h1{color:#203e2c}.trail-masthead p{color:#7b735e}.trail-unit{background:#244c35;box-shadow:0 4px 0 #1b3828}.trail-unit small{color:#d7cfaf}.trail-unit div>span{color:#e9e1c9}.trail-unit progress{background:#50634b}.trail-unit progress::-webkit-progress-bar{background:#50634b}.trail-unit progress::-webkit-progress-value{background:#dfa05e}.trail-unit progress::-moz-progress-bar{background:#dfa05e}.unit-icon{color:#dcd0aa}.trail-toolbar{color:#6f735c}.trail-link{color:#244b33}.trail-chapter{color:#817b60}.trail-chapter::before,.trail-chapter::after{background:#d9ccb2}.trail-stop .scene-button{background:#bec2a7;color:#92977d;border-bottom-color:#8e957b;box-shadow:inset 0 1px 0 #e0dfc7}.trail-stop .scene-button.current{background:#2b5639;border-bottom-color:#173822;box-shadow:0 0 0 7px #eee5c9,0 0 0 11px #c4d1a7;color:#fff5db}.trail-stop .scene-button.done{background:#c48442;border-bottom-color:#925d2a;color:#fff1cb;box-shadow:inset 0 1px 0 #edbd7d}.trail-stop .scene-button.current.done{box-shadow:0 0 0 7px #eee5c9,0 0 0 11px #dcb37b}.trail-stop-label{color:#314a32}.trail-stop.current .trail-stop-label{color:#203d28}.trail-stop-meta{color:#696d56;background:#f4e9d3d9;border-radius:6px;padding:1px 5px}.trail-flag{background:#254c34;color:#fff5dc;border-color:#254c34}.trail-flag::after{background:#254c34;border-color:#254c34}.trail-start-card{background:#faf0dc;border-color:#d8c6a1;box-shadow:0 8px 25px #4b412627}.trail-start-card h3{color:#23472f}.trail-start-card p{color:#736d57}.trail-primary{background:#2a5339;border-bottom-color:#163622;color:#fff5db}.trail-ending{background:#efe1c7df;color:#2a4630}.trail-ending p{color:#77745a}.trail-ending>span{color:#b6813e}.trail-footer{color:#6c7059;background:#f2e6cedb;border-radius:14px;padding:6px 12px}.trail-legend{color:#667056}.trail-reset{color:#616c50}.trail-locate{background:#fbf0dc;border-color:#d5c7a7;border-bottom-color:#b9aa86;color:#315839}#sceneReward{background:#fbf3e2}#sceneReward .trail-primary{background:#2b5639;border-bottom-color:#173822}.reward-art{background:radial-gradient(ellipse,#f8e2b0,transparent 65%)}
@media(max-width:800px){.trail-masthead{margin-left:-20px;margin-right:-20px;padding-left:20px;padding-right:20px}}@media(max-width:360px){.trail-masthead{margin-left:-16px;margin-right:-16px;padding-left:16px;padding-right:16px}}

/* Original code-drawn detective, inspired by the user's character reference. */
.trail-detective{width:100px;height:110px;right:105px;top:-23px}.trail-detective .sherlock-cartoon{width:100%;height:100%;overflow:visible}.sherlock-cartoon .sherlock-body{transform-origin:70px 145px}.sherlock-cartoon .sherlock-search-arm{transform-origin:91px 94px}.sherlock-cartoon .sherlock-head{transform-origin:76px 80px}
@media(prefers-reduced-motion:no-preference){.trail-detective:not([hidden]) .sherlock-body{animation:sherlock-breathe 3.2s ease-in-out infinite}.trail-detective:not([hidden]) .sherlock-search-arm{animation:sherlock-inspect 4.6s ease-in-out infinite}.trail-detective:not([hidden]) .sherlock-head{animation:sherlock-look 4.6s ease-in-out infinite}.trail-detective:not([hidden]) .sherlock-shadow{animation:sherlock-ground 3.2s ease-in-out infinite;transform-origin:70px 151px}@keyframes sherlock-breathe{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-2px) rotate(1deg)}}@keyframes sherlock-inspect{0%,100%{transform:rotate(0)}35%,65%{transform:rotate(-7deg)}}@keyframes sherlock-look{0%,100%{transform:rotate(0)}40%,60%{transform:rotate(3deg)}}@keyframes sherlock-ground{0%,100%{transform:scaleX(1);opacity:.16}50%{transform:scaleX(.94);opacity:.12}}}
@media(max-width:800px){.trail-detective{width:92px;height:100px;right:100px;top:-19px}.trail-detective .sherlock-cartoon{width:100%;height:100%}}@media(max-width:360px){.trail-detective{width:76px;height:87px;right:97px;top:-11px}.trail-detective .sherlock-cartoon{width:100%;height:100%}}

/* Reference-based transparent character sprite replaces rejected hand-drawn SVG. */
.trail-detective{width:110px;height:110px;right:105px;top:-24px}.trail-detective .sherlock-sprite{display:block;width:100%;height:100%;object-fit:contain;transform-origin:50% 90%;pointer-events:none}
@media(prefers-reduced-motion:no-preference){.trail-detective:not([hidden]) .sherlock-sprite{animation:sherlock-sprite-breathe 3.6s ease-in-out infinite}@keyframes sherlock-sprite-breathe{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-3px) rotate(1deg)}}}
@media(max-width:800px){.trail-detective{width:100px;height:105px;right:104px;top:-22px}}@media(max-width:360px){.trail-detective{width:85px;height:95px;right:100px;top:-15px}}

#practiceListen.portuguese-listen{display:block;background:#eef4e8;color:#27533b;border:2px solid #d4e3c9;border-bottom:4px solid #bed0b0;border-radius:14px;padding:14px 20px;margin:18px auto;min-height:54px;font-size:16px;font-weight:700;text-align:center;text-decoration:none}#practiceListen.portuguese-listen:active{transform:translateY(2px)}

.speech-target{font-size:24px;line-height:1.5;font-weight:650;color:#2b4937;padding:20px;background:#f4f7ef;border-radius:14px}.speech-note,#speechStatus{font-size:12px;line-height:1.6;color:#72836a}.speech-note{font-size:11px}#speechStart{min-width:180px}#speechStart[aria-pressed=true]{background:#a44737;border-bottom-color:#743125}#speechHeard{font-size:15px;overflow-wrap:anywhere}#speechDiff{display:flex;flex-wrap:wrap;gap:7px;margin:14px 0}#speechDiff span{padding:4px 8px;border-radius:6px;font-size:15px}.speech-match{background:#e5f1dd;color:#315936}.speech-missing{background:#fbe4dc;color:#9b3929;text-decoration:underline;text-decoration-thickness:2px}.speech-extra{background:#fff0ce;color:#7f5816}.reading-exercise{font:18px/1.8 Georgia,serif;color:#324b37;border-left:4px solid #b3c9a2;padding:16px 20px;background:#f6f8f1;border-radius:0 12px 12px 0;margin:18px 0;white-space:pre-wrap}#practiceListen.english-listen{display:block;margin:12px 0;font-size:14px;min-height:44px}#practiceSentence[hidden]{display:none}

/* Optional writing solution: revealing never submits an answer. */
.writing-help{margin:12px 0 20px}.writing-solution{margin-top:12px;padding:16px;border-left:3px solid #b48a4f;background:#f4f7ee;border-radius:0 12px 12px 0}.writing-solution p{white-space:pre-wrap;overflow-wrap:anywhere;font-size:1.05rem}.writing-solution small{color:#536656}

/* Added grammar and vocabulary, scoped to preserve the original interface. */
.xs-study{margin:24px 0;padding:clamp(16px,3vw,30px);background:#f8f1e3;border:1px solid #d8ccb4;border-radius:20px}
.xs-study h2{font-size:clamp(22px,4vw,30px);margin:12px 0;color:#163d39}
.xs-actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.xs-actions button{white-space:normal;text-align:left;min-height:48px}
.xs-actions button[aria-expanded=true]{background:#163d39;color:#fff}
.xs-card{border:1px solid #d8ccb4;border-radius:14px;background:#fffdf8;margin:12px 0;overflow-wrap:anywhere}
.xs-card summary{cursor:pointer;padding:18px;font-weight:700;color:#163d39;min-height:48px}
.xs-card[open] summary{border-bottom:1px solid #e7ddca}
.xs-card-body{padding:0 18px 18px;line-height:1.65}
.xs-card h4{font-size:1rem;margin:22px 0 10px}
.xs-kicker{font-size:.82rem;color:#6b5a44;font-weight:700}
.xs-evidence,.xs-contrast{margin:10px 0;padding:10px 14px;border-left:3px solid #b58a4e;background:#f5eddd}
.xs-dialogue{border-radius:12px;padding:8px 16px;background:#edf3ec;margin:18px 0}
.xs-dialogue p{margin:8px 0}
.xs-card ul{padding-left:22px}
.xs-quiz{border-top:1px solid #e6dccb;padding-top:18px;margin-top:20px}
.xs-quiz fieldset{min-width:0;border:0;padding:0;margin:0}
.xs-quiz legend{font-weight:700;margin-bottom:12px;max-width:100%;white-space:normal}
.xs-choice{display:flex;align-items:flex-start;gap:10px;border:1px solid #d7ccb8;border-radius:10px;padding:12px;margin:8px 0;cursor:pointer;min-height:46px}
.xs-choice:has(input:checked){border-color:#25574b;background:#eef4ee}
.xs-choice input{accent-color:#25574b;flex:0 0 auto;margin-top:5px}
.xs-choice span{min-width:0}
.xs-check{margin-top:10px}
.xs-feedback{padding:12px;border-radius:10px;background:#e7f1e7;margin-top:12px}
.xs-feedback.xs-retry{background:#fff0db}
.xs-feedback p{margin:6px 0}
.xs-source{display:inline-block;margin-top:18px;color:#25574b}
.xs-study button:focus-visible,.xs-study summary:focus-visible,.xs-study input:focus-visible{outline:3px solid #b76a30;outline-offset:3px}
@media(max-width:480px){.xs-actions{flex-direction:column}.xs-actions button{width:100%}.xs-card-body{padding:0 12px 14px}.xs-card summary{padding:14px}.xs-choice{padding:10px}}

/* Story selection: existing art, parchment and two connected case cards. */
.cs-home,.cs-secondary{width:100%;max-width:920px;margin:0 auto;padding:36px 0 70px}
.cs-home-heading{max-width:650px;margin:0 auto 32px;text-align:center}
.cs-home-heading h1{font-size:clamp(30px,5vw,48px);line-height:1.15;margin:14px 0;color:#163d39}
.cs-home-heading p{line-height:1.7;color:#645c4d}
.cs-story-path{position:relative;display:grid;gap:48px;max-width:700px;margin:auto;padding:6px 12px}
.cs-story-path:before{content:"";position:absolute;left:50%;top:20px;bottom:20px;border-left:3px dashed #b68d52;opacity:.5}
.cs-story-card{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);background:#fffcf4;border:1px solid #d9c9ac;border-radius:22px;overflow:hidden;box-shadow:0 6px 0 #cbb995,0 14px 30px #1d352b12}
.cs-story-art{position:relative;min-height:290px;background:#d4c5a6}
.cs-story-art img{width:100%;height:100%;position:absolute;object-fit:cover;object-position:center}
.cs-case-number{position:absolute;left:16px;top:16px;background:#183f36;color:#fff6df;padding:8px 12px;border-radius:20px;font-size:.75rem;letter-spacing:.1em;font-weight:700}
.cs-story-body{padding:25px;min-width:0;display:flex;flex-direction:column;align-items:flex-start}
.cs-status{font-size:.68rem;letter-spacing:.09em;font-weight:800;color:#775a2d}
.cs-story-body h2{font-size:clamp(22px,3vw,29px);line-height:1.15;color:#163d39;margin:15px 0}
.cs-meta,.cs-preview-note{font-size:.9rem;line-height:1.6;color:#665d4b}
.cs-story-body progress{width:100%;margin:12px 0 0;accent-color:#245545}
.cs-story-body .trail-primary{margin-top:auto;min-height:48px}
.cs-preview-note{margin-bottom:22px}
.cs-preview-banner{max-width:620px;margin:0 auto 25px;background:#fff2d9;border:1px solid #dcc598;border-radius:14px;padding:18px;line-height:1.6}
.cs-preview-banner p{margin:8px 0 0}
.cs-scene-path{max-width:420px;margin:30px auto;position:relative;padding:10px 0}
.cs-scene-path:before{content:"";position:absolute;left:50%;top:20px;bottom:20px;border-left:3px dashed #b28c55;opacity:.45}
.cs-preview-stop{position:relative;height:114px;display:flex;flex-direction:column;align-items:center;left:var(--case-x);width:90px;transform:translateX(-50%)}
.cs-preview-node{width:64px;height:64px;min-height:64px;border-radius:50%;background:#25564a;color:#fff8e9;border:3px solid #f2e4c6;box-shadow:0 5px 0 #173e35;font-size:1.1rem;font-weight:800;cursor:pointer;position:relative}
.cs-preview-node:hover{background:#34725e}
.cs-preview-label{font-size:.68rem;font-weight:700;letter-spacing:.07em;margin-top:12px;color:#6d5b3d}
.cs-scene-dialog{border:1px solid #cbbb9b;border-radius:18px;background:#fffcf4;width:min(700px,94vw);max-height:92dvh;padding:0;overflow:hidden;color:#203d32}
.cs-scene-dialog::backdrop{background:#102c24b8}
.cs-dialog-close{position:absolute;right:12px;top:10px;z-index:1;background:#fffcf4;min-width:42px;min-height:42px}
.cs-scene-body{padding:28px;max-height:calc(92dvh - 80px);overflow-y:auto;overscroll-behavior:contain}
.cs-scene-body h2{padding-right:30px;line-height:1.25}
.cs-scene-body img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;border-radius:12px}
.cs-preview-caption{font-size:.7rem;letter-spacing:.08em;font-weight:700;color:#876a3c}
.cs-dialog-nav{padding:12px 24px;display:flex;justify-content:space-between;gap:10px;border-top:1px solid #ded0b8;background:#f7efdf}
.cs-back{white-space:nowrap}
.cs-home button:focus-visible,.cs-secondary button:focus-visible{outline:3px solid #b67936;outline-offset:4px}
@media(max-width:600px){.cs-home,.cs-secondary{padding:24px 0 45px}.cs-home-heading{padding:0 8px}.cs-story-card{grid-template-columns:minmax(0,1fr)}.cs-story-art{min-height:0;aspect-ratio:3/2}.cs-story-body{padding:22px}.cs-story-body .trail-primary{width:100%;margin-top:12px}.cs-story-path{gap:38px;padding:4px}.cs-scene-body{padding:20px}.cs-back{font-size:.75rem;padding:8px}.topbar .topnote{display:none}.cs-dialog-nav{padding:12px}}

@media(max-width:600px){.topbar{height:auto;min-height:76px;flex-wrap:wrap;gap:8px}.topbar .cs-back{margin-left:auto}.topbar .top-trail{margin-left:0}}