:root{--bg:#f5f9fd;--paper:#fffefd;--ink:#2b4054;--muted:#60758a;--blue:#37658a;--sky:#c5e0fa;--orange:#ffd2a3;--border:#d8e4ee;--cjk:"Noto Sans CJK JP","Noto Sans JP","Hiragino Sans","Microsoft YaHei",sans-serif;--shadow:0 4px 20px #25436305;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer}button,a,input{touch-action:manipulation}button{color:inherit}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid 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input{accent-color:var(--blue);width:15px;height:15px}.welcome{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:36px 0 32px}.eyebrow{font-size:9px;letter-spacing:1.8px;font-weight:650;color:var(--muted)}h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(32px,3.3vw,50px);font-weight:400;letter-spacing:-1.6px;margin:11px 0 10px}h1 em{font-weight:400;color:#6295bf}.welcome>div>p{font-size:13px;color:var(--muted);margin:0 0 18px}.study-order{display:flex;align-items:center;gap:8px;font-size:10px;color:#647c91}.study-order i{font-style:normal;color:#94afc3}.hero-progress{display:flex;gap:16px;align-items:center;background:#e4f1fc;padding:23px 24px;border-radius:16px;min-width:312px}.hero-progress strong{font-size:12px}.hero-progress p{font-size:10px;color:var(--muted);margin:7px 0 12px}.progress-ring{--pct:0%;width:68px;height:68px;flex-shrink:0;border-radius:50%;background:conic-gradient(var(--blue) var(--pct),#cddfed 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h3{font-size:12px;font-weight:600;margin:0}.list-top span{font-size:10px;color:var(--muted)}.search{display:flex;align-items:center;gap:7px;margin:0 11px;background:var(--paper);border:1px solid var(--border);padding:9px;border-radius:8px}.search svg{width:13px;height:13px;color:#7d98af;flex-shrink:0}.search input{background:none;border:0;outline:0;width:100%;min-width:0;font-size:10px;color:var(--ink)}.filter-tabs{display:flex;gap:5px;padding:11px}.filter-tabs button{font-size:10px;color:var(--muted);padding:6px 8px;border-radius:6px}.filter-tabs .selected{background:#d8eafa;color:var(--blue)}#lesson-list{max-height:650px;overflow:auto;padding:0 6px 9px}.lesson-link{padding:13px 9px;text-align:left;display:flex;align-items:flex-start;gap:9px;width:100%;border-radius:8px;margin-bottom:3px}.lesson-link:hover{background:#e0eef9}.lesson-link.active{background:var(--paper);box-shadow:0 2px 8px #25436307}.lesson-link.active .lesson-number{background:var(--blue);border-color:var(--blue);color:white}.lesson-number{font-size:9px;min-width:21px;height:21px;border-radius:50%;border:1px solid #cbddea;display:grid;place-items:center;color:var(--muted)}.lesson-name{font-family:var(--cjk);font-size:12px;line-height:1.6;overflow-wrap:anywhere}.lesson-link small{display:block;font-family:Inter,-apple-system,sans-serif;font-size:9px;line-height:1.5;color:var(--muted);margin-top:5px}.lesson-number.done{background:#d3e9fb;color:var(--blue);border-color:#aecfe8}.empty{padding:18px;font-size:12px;color:var(--muted);line-height:1.6}#study-content{min-width:0}.learning-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(275px,1fr);gap:18px;align-items:start}.lesson-card{background:var(--paper);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}.card-top{display:flex;justify-content:space-between;align-items:center;padding:17px 22px;border-bottom:1px solid var(--border);font-size:9px;letter-spacing:1px;color:var(--muted)}.status-pill{font-size:9px;background:#e4f1fc;border-radius:20px;padding:5px 8px;letter-spacing:0;color:#58778e}.lesson-section{padding:19px 24px;border-bottom:1px solid #e3ebf2}.lesson-section:last-child{border:0}.section-label{font-size:9px;letter-spacing:1.2px;color:var(--muted);margin-bottom:12px}.section-label b{color:#809db5;font-weight:500;margin-right:7px}.pattern{font-family:var(--cjk);font-weight:500;font-size:25px;line-height:1.6;overflow-wrap:anywhere;margin:0 0 8px;letter-spacing:.5px}.formula{font-size:11px;color:#637a8c;line-height:1.8;margin:0;font-family:var(--cjk)}.zh-meaning{font-family:var(--cjk);font-size:19px;line-height:1.6;color:var(--ink);margin:0}.pinyin{font-size:12px;line-height:1.7;color:#5a738b;margin:6px 0 0;letter-spacing:.1px}.hide-pinyin .pinyin{display:none}.example-pair{background:#eef6fd;padding:15px 16px;border-radius:10px;margin-top:12px}.example-pair:first-of-type{margin-top:0}.example-lang{font-size:8px;letter-spacing:1px;color:#7590a6;margin:0 0 7px}.example-jp,.example-zh{font-family:var(--cjk);font-size:17px;line-height:1.9;color:#2c3f50;font-weight:400;overflow-wrap:anywhere;margin:0}.example-zh{margin-top:12px;padding-top:11px;border-top:1px solid #d7e6f2}.en-meaning{font-size:13px;line-height:1.8;margin:0}.usage-note{margin-top:12px;padding-top:12px;border-top:1px solid #dfe9f1;font-size:11px;line-height:1.9;color:var(--muted)}.note-label{font-size:9px;font-weight:650;color:#486d8b;display:block;margin-bottom:5px}.card-bottom{padding:14px 18px;display:flex;justify-content:space-between;border-top:1px solid var(--border)}.nav-button{font-size:11px;padding:6px 4px}.practice-card{background:var(--orange);border:1px solid #f0d4b5;border-radius:16px;padding:20px;position:sticky;top:20px}.practice-top{display:flex;align-items:center;justify-content:space-between;font-size:9px;letter-spacing:1.2px;color:#8c5f3b}.practice-top span:last-child{font-size:9px;letter-spacing:0;border:1px solid #e9c8a4;border-radius:20px;padding:4px 7px}.practice-card h3{font-family:Georgia,serif;font-size:25px;font-weight:400;margin:16px 0 6px;letter-spacing:-.4px}.practice-sub{font-size:11px;color:#8b6343;line-height:1.7;margin:0 0 19px}.question-tabs{display:flex;gap:6px;margin:0 0 20px}.question-tabs button{background:#fffaf388;border-radius:7px;font-size:10px;padding:8px 10px;color:#8b5d39}.question-tabs button.active{background:#9a4e1e;color:white}.question-title{font-size:12px;line-height:1.8;margin:13px 0}.question-sentence{font-family:var(--cjk);font-size:18px;line-height:2;overflow-wrap:anywhere;margin:12px 0 18px}.blank{display:inline-block;min-width:38px;border-bottom:2px solid #b8733d;color:#8d552d;text-align:center;margin:0 3px;line-height:1.6}.answer-options{display:flex;flex-direction:column;gap:8px}.answer-option{background:#fffaf4;border:1px solid #ecd6be;border-radius:9px;display:flex;gap:9px;text-align:left;align-items:center;padding:12px;font-size:12px;line-height:1.7;overflow-wrap:anywhere}.answer-option .option-letter{border:1px solid #ecd7bf;border-radius:5px;font-size:8px;width:19px;height:19px;display:grid;place-items:center;flex-shrink:0;color:#a27854}.answer-option:hover{border-color:#ca945f;background:white}.answer-option.right{border-color:#6892b4;background:#e2f0fc}.answer-option.wrong{border-color:#c68f83;background:#faeeea}.answer-option:disabled{opacity:1}.practice-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:15px}.subtle-button{font-size:10px;color:#8d542e;padding:0;text-decoration:underline;text-underline-offset:3px}.feedback{margin-top:15px;background:#fff7ee;border-radius:10px;padding:13px;font-size:11px;line-height:1.8}.feedback strong{display:block;font-size:12px;margin-bottom:5px}.feedback.correct{background:#dcecf9;color:#244a6e}.feedback.incorrect{background:#f7e7df;color:#7d4c3d}.primary{background:var(--blue);color:#fff;border-radius:8px;padding:11px 16px;font-size:11px;font-weight:500}.primary:hover{background:#2a5173}.practice-card .primary{background:#9a4e1e;margin-top:14px;width:100%}.hint{font-family:var(--cjk);font-size:11px;line-height:1.8;color:#8c603d;margin-top:12px}.typed-form{display:flex;flex-wrap:wrap;gap:8px}.typed-form label{width:100%;font-size:10px}.typed-form input{width:100%;background:#fffefd;border:1px solid #dfbc97;border-radius:7px;padding:12px;font-family:var(--cjk);font-size:16px;min-width:0}.typed-form .primary{margin:0}.confidence{display:flex;gap:8px;font-size:10px;color:#8b6547;margin-top:20px;padding-top:15px;border-top:1px solid #ebcfb0}.confidence span{color:#47799f}.below-card{margin-top:16px;background:#e6f2fc;border-radius:12px;padding:16px 20px;font-size:11px;line-height:1.8;color:#5b768d}.below-card strong{display:block;color:#375f80;margin-bottom:3px}.keigo-table{width:100%;border-collapse:collapse;font-size:12px;margin-top:15px}.keigo-table th{text-align:left;background:#e4f1fc;font-size:10px;padding:11px}.keigo-table td{font-family:var(--cjk);padding:11px;border-bottom:1px solid var(--border);line-height:1.8;vertical-align:top}.keigo-details{padding:16px 22px;border-top:1px solid var(--border);font-size:11px}.keigo-details summary{cursor:pointer;font-weight:600}.keigo-details p{line-height:1.8;color:var(--muted)}footer{display:flex;justify-content:space-between;gap:20px;font-size:9px;color:#7992a6;padding:30px 0}dialog{border:1px solid var(--border);border-radius:20px;background:var(--paper);color:var(--ink);padding:26px;width:min(740px,calc(100vw - 32px));max-height:85vh;box-shadow:0 20px 100px #203d5922}dialog::backdrop{background:#233d574d;backdrop-filter:blur(3px)}.modal-top{display:flex;justify-content:space-between;align-items:start;gap:18px;border-bottom:1px solid var(--border);padding-bottom:20px;margin-bottom:22px}.modal-top h2{font-family:Georgia,serif;font-size:28px;font-weight:400;margin-top:9px}.icon-button{font-size:25px;border-radius:50%;background:#e4f1fc;min-width:33px;height:33px;line-height:1}.modal-copy{font-size:13px;line-height:1.9}.modal-copy h3{font-size:14px;margin:23px 0 8px}.modal-copy p{margin:9px 0}.source-box{background:#eaf4fc;padding:16px;border-radius:12px;font-size:12px;line-height:1.9;margin:18px 0}.comparison{border:1px solid var(--border);border-radius:12px;padding:18px;margin-bottom:13px}.comparison h3{font-family:var(--cjk);font-size:16px;font-weight:500;margin:0 0 10px}.comparison p{font-size:11px;line-height:1.8;margin:6px 0;color:var(--muted)}.comparison .question-sentence{font-size:15px;color:var(--ink)}.compare-options{display:flex;gap:8px;flex-wrap:wrap}.compare-options button{font-family:var(--cjk);font-size:12px;border:1px solid #bdd6e9;background:#f0f7fd;border-radius:7px;padding:8px 13px}.compare-feedback{font-size:11px;line-height:1.7;color:#365f80;padding-top:10px}.session-q{padding:6px 0 10px}.session-q .answer-option{background:#f2f7fc;border-color:var(--border)}.session-q .question-title{font-size:16px}.session-q .primary{margin-top:18px}.session-count{font-size:11px;color:var(--muted);margin-bottom:14px}.session-progress{height:4px;background:#dceaf5;border-radius:4px;margin-bottom:22px;overflow:hidden}.session-progress>span{display:block;height:100%;background:#6c9fc7}.session-score{font-family:Georgia,serif;font-size:64px;line-height:1.2;margin:20px 0}.modal-metric{font-size:12px;color:var(--muted);line-height:1.8}.hint-reveal{margin:10px 0;font-size:11px;color:var(--muted)}.hint-reveal summary{cursor:pointer}.hint-reveal p{line-height:1.9}.reset-box{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}.reset-box button{font-size:11px;border:1px solid #c4dbea;border-radius:7px;padding:8px 12px}.reset-box p{font-size:10px;color:var(--muted);width:100%}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--blue);color:white;border-radius:12px;padding:12px 20px;font-size:12px;z-index:30;display:none}#toast.visible{display:block}.no-results{padding:40px;background:var(--paper);border-radius:14px;border:1px solid var(--border);font-size:13px;line-height:1.9}.storage-warning{color:#9a5847!important}@media(min-width:1700px){main{padding:0 60px}.learning-grid{grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr)}}@media(max-width:1300px){main{padding:0 28px}.sidebar{width:218px;padding-left:16px;padding-right:16px}main{margin-left:218px}.study-layout{grid-template-columns:205px minmax(0,1fr);gap:16px}.learning-grid{grid-template-columns:minmax(0,1fr)}.practice-card{position:static}.answer-options{display:grid;grid-template-columns:1fr}.hero-progress{min-width:255px;padding:20px 16px}.lesson-section{padding:18px 22px}}@media(max-width:950px){.sidebar{width:190px;padding:24px 12px}.brand{font-size:18px;gap:8px}.brand small{font-size:6px}.brand-icon{width:35px;height:39px;font-size:24px}main{margin-left:190px;padding:0 22px}.hero-progress{display:none}.welcome{padding:26px 0}.study-layout{grid-template-columns:180px minmax(0,1fr);gap:12px}.lesson-name{font-size:11px}.topbar{height:70px}.pattern{font-size:22px}.study-order{font-size:9px;gap:5px}.sidebar .side-action{font-size:11px;padding-left:5px;padding-right:5px}.lesson-section{padding:18px}.card-top{padding:14px 18px}.side-label{margin-top:35px}.example-pair{padding:12px}.example-jp,.example-zh{font-size:16px}}@media(max-width:700px){.sidebar{position:static;width:100%;padding:16px;display:block;border-right:0;border-bottom:1px solid var(--border)}.brand{font-size:19px;display:inline-flex}.brand small{font-size:7px}.side-label,.side-line,.side-bottom{display:none}#chapter-nav{display:flex;gap:6px;margin-top:18px}.chapter-nav{padding:9px 8px;gap:7px;margin:0;flex:1}.chapter-nav .nav-number{width:23px;height:23px;border-radius:6px;font-size:9px}.chapter-nav strong{font-size:10px}.chapter-nav small{font-size:8px;margin-top:3px}.side-action{display:inline-flex;margin-top:10px;padding:6px!important;font-size:10px!important}.side-action>span:first-child{width:auto;font-size:15px}.side-action .bubble{font-size:8px}main{margin:0;padding:0 16px}.topbar{height:56px;font-size:10px}.top-tools{gap:12px}.topbar>div>span{padding:0 6px}.toggle{font-size:10px}.avatar{width:26px;height:26px}.welcome{padding:25px 0 22px}h1{font-size:36px}.welcome>div>p{font-size:12px}.study-order{font-size:9px;gap:6px}.section-head{margin-bottom:15px;align-items:end}h2{font-size:19px}.section-head .eyebrow{font-size:8px;letter-spacing:1.4px}.chapter-progress{font-size:8px;padding:6px 8px}.study-layout{display:block}.lesson-browser{margin-bottom:15px;padding:10px}.list-top{padding:2px 3px 10px}.search{margin:0}.filter-tabs{padding:8px 0}.filter-tabs button{font-size:10px}#lesson-list{display:flex;gap:6px;max-height:150px;overflow:auto;padding:0 0 3px}.lesson-link{min-width:160px;max-width:190px;flex-shrink:0;padding:10px;border:1px solid #dce9f3;margin:0}.lesson-link small{font-size:8px}.lesson-name{font-size:11px}.lesson-card{border-radius:13px}.lesson-section{padding:18px 20px}.pattern{font-size:24px}.example-jp,.example-zh{font-size:17px}.learning-grid{gap:15px}.practice-card{padding:21px}.practice-card h3{font-size:27px}.answer-option{font-size:13px;padding:13px}.question-sentence{font-size:19px}.pinyin{font-size:12px}.en-meaning{font-size:13px}.usage-note{font-size:12px}.section-label{font-size:9px}footer{font-size:8px;gap:12px;line-height:1.6}.keigo-table{font-size:10px}.keigo-table td,.keigo-table th{padding:8px 5px}dialog{padding:20px}.modal-top h2{font-size:24px}.study-order{flex-wrap:wrap}#toast{width:calc(100% - 32px);text-align:center;left:16px;transform:none}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.mobile-mix{display:none}@media(max-width:950px){.mobile-mix{display:flex}}@media(max-width:700px){.mobile-mix{display:inline-flex}}
@media(max-width:700px){#chapter-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}.chapter-nav{min-width:0;flex-direction:column;align-items:flex-start;gap:7px}.chapter-nav small{line-height:1.5}.chapter-nav>span:last-child{min-width:0}.side-action{gap:5px}}

/* Baby blue navigation and soft orange practice accents. */
.chapter-nav.active{background:#b9daf7;color:#2d4c67}.chapter-nav.active .nav-number{border-color:#86b5da}.brand-icon{background:#b9daf7;color:#2d4c67}.practice-card .primary:hover,.question-tabs button.active:hover{background:#803d15}
/* Keep a way back visible while studying and inside long dialogs. */
.topbar{position:sticky;top:0;z-index:2;background:var(--bg)}
.topbar-location{display:flex;align-items:center;gap:16px;min-width:0}
.breadcrumb span{padding:0 10px;color:#93a8ba}
.back-button{border:1px solid #aecfe8;background:#e4f1fc;color:#2d4c67;padding:9px 13px;border-radius:8px;font-size:12px;font-weight:600;white-space:nowrap}
.back-button:hover:not(:disabled){background:#cce4f8}.back-button:disabled{opacity:.45}
#modal[open]{display:flex;flex-direction:column;overflow:hidden}
.modal-top{flex-shrink:0}.modal-top h2{overflow-wrap:anywhere}
#modal-body{overflow-y:auto;min-height:0;overscroll-behavior:contain;padding:0 3px 3px}
.modal-footer{flex-shrink:0;display:flex;justify-content:flex-start;border-top:1px solid var(--border);margin-top:18px;padding-top:15px}
@media(max-width:700px){.breadcrumb{display:none}.back-button{font-size:11px;padding:9px 12px}.modal-footer .back-button{width:100%}.modal-footer{margin-top:12px;padding-top:12px}}
/* Optional French connections, following the original four study steps. */
.hide-french .french-bridge{display:none}
.french-bridge{background:#fffbf5}
.french-bridge .section-label b{color:#a26738}
.fr-equivalent{margin:0;font-size:17px;line-height:1.7;color:#7e4b27;font-family:Georgia,serif}
.fr-note{font-size:12px;line-height:1.85;color:#6b675e;margin:10px 0 0}
.fr-example{margin-top:14px;padding:13px 14px;background:var(--orange);border-radius:9px}
.fr-example p{font-size:13px;line-height:1.8;margin:0;color:#5d4533}
.fr-example .example-lang{color:#9a7656}
.aspect-details{border-top:1px solid #ecd8c1;margin-top:17px;padding-top:14px}
.aspect-details summary{cursor:pointer;font-size:11px;line-height:1.8;font-weight:600;color:#835733}
.aspect-connection{margin-top:14px;padding-top:13px;border-top:1px solid #eee1d0}
.aspect-label{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;font-size:10px;color:#8b725b}
.aspect-label strong{font-family:var(--cjk);color:var(--ink);font-size:15px;font-weight:500}
.aspect-jp{font-family:var(--cjk);font-size:14px;line-height:1.9;margin:8px 0;color:#2c3f50}
.aspect-fr{font-size:13px;line-height:1.8;margin:5px 0;color:#7e4b27}
@media(max-width:950px) and (min-width:701px){.breadcrumb{display:none}.top-tools{gap:14px}}
@media(max-width:700px){.top-tools{gap:10px}.fr-equivalent{font-size:18px}}
/* Six-question practice bank and adjustable mixed rounds. */
.question-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin-bottom:12px}.question-tabs button{padding:9px 6px;min-height:40px;line-height:1.5;overflow-wrap:anywhere}.question-position{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:10px;color:#8b5d39}.question-position button{font-size:10px;padding:7px 0}.question-position button:not(:disabled){text-decoration:underline;text-underline-offset:3px}.below-card .text-button{display:block;margin-top:10px;color:var(--blue);line-height:1.7}.session-setup{display:flex;flex-direction:column;gap:12px}.session-setup label{font-size:12px;font-weight:600;margin-top:8px}.session-setup select{font:inherit;color:var(--ink);background:#f0f7fd;border:1px solid #bfd5e6;border-radius:8px;padding:12px;width:100%}.session-setup select:focus-visible{outline:3px solid #b86b2d;outline-offset:3px}.session-setup .primary{align-self:flex-start}.session-setup .modal-copy{margin:0 0 6px}
.chapter-practice-link{display:block;margin-top:15px;font-size:11px;font-weight:600;color:#8d542e;text-decoration:underline;text-underline-offset:3px;padding:6px 0}
.learning-grid>div{position:sticky;top:106px}.practice-card{position:static}@media(max-width:1300px){.learning-grid>div{position:static}}
/* A dedicated question sheet for each chapter. */
[hidden]{display:none!important}.sidebar{overflow-y:auto}.view-nav{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:25px}.view-nav button{border:1px solid #c7ddeb;border-radius:8px;padding:10px 5px;font-size:11px;line-height:1.5;background:#f5faff}.view-nav button[aria-current="page"]{background:#c5e0fa;border-color:#99c1e0;color:#294e6b;font-weight:600}.side-label{margin-top:24px}
#question-room{max-width:1100px;margin:0 auto;padding-top:32px;outline:0}.room-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:25px}.room-heading h1{font-size:clamp(34px,3.5vw,48px);margin:10px 0 12px}.room-heading p{font-size:13px;line-height:1.8;color:var(--muted);margin:0}.room-heading .back-button{flex-shrink:0}.room-chapters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:20px}.room-chapters button{padding:14px 18px;background:#e9f3fc;border:1px solid #cee1f0;border-radius:12px;font-size:13px;text-align:left}.room-chapters button span{display:block;font-size:10px;margin-top:6px;color:#59788e}.room-chapters button[aria-current="page"]{background:#c5e0fa;border-color:#8eb8da;font-weight:600}.room-tools{display:grid;grid-template-columns:minmax(180px,1fr) auto minmax(180px,1fr);align-items:center;gap:22px;border:1px solid var(--border);background:var(--paper);padding:20px;border-radius:14px;margin-bottom:34px}.room-progress>div:first-child{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted)}.room-progress strong{font-size:12px;color:var(--ink)}.room-track{height:5px;border-radius:5px;background:#dcebf7;margin-top:12px;overflow:hidden}.room-track>span{display:block;height:100%;background:#6b9fc6;transition:width .2s}.room-jump{display:flex;flex-direction:column;gap:7px;font-size:10px;color:var(--muted)}.room-jump select{width:100%;min-width:0;max-width:100%;padding:9px;border:1px solid #bdd5e6;border-radius:7px;background:#f1f7fc;color:var(--ink);font:11px var(--cjk)}.room-jump select:focus-visible{outline:3px solid #b86b2d;outline-offset:3px}.room-group{margin-bottom:42px;scroll-margin-top:110px}.room-group-heading{display:flex;align-items:center;gap:12px;margin-bottom:16px}.room-point{display:grid;place-items:center;flex-shrink:0;width:34px;height:34px;background:var(--orange);border-radius:10px;font-size:11px;color:#8a542e}.room-group-heading h2{font-family:var(--cjk);font-size:20px;line-height:1.7;letter-spacing:0;margin:0;scroll-margin-top:110px}.room-group-heading>span:last-child{margin-left:auto;white-space:nowrap;color:var(--muted);font-size:10px}.room-question-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;align-items:start}.room-card{min-width:0;border:1px solid var(--border);border-radius:15px;background:var(--paper);padding:23px;box-shadow:var(--shadow);scroll-margin-top:110px}.room-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--muted);font-size:9px;letter-spacing:1px;margin-bottom:17px}.room-status{background:#e8f3fc;border-radius:12px;padding:5px 8px;letter-spacing:0;white-space:nowrap;color:#406783}.room-card .question-title{font-size:13px;line-height:1.9;min-height:25px}.room-card .answer-option{background:#f1f7fd;border-color:#d3e3ef;font-size:13px;line-height:1.8;padding:12px 13px}.room-card .answer-option:hover{border-color:#7eaccd;background:#e6f2fc}.room-card .answer-option.right{background:#dcecf9;border-color:#6892b4}.room-card .answer-option.wrong{background:#faeeea;border-color:#c68f83}.room-card .feedback{font-size:12px;margin-top:18px}.room-card .typed-form{margin-top:15px}.room-card .typed-form input{background:#f7fbff;border-color:#adcce1}.room-card .practice-actions{gap:16px}.room-card .subtle-button{color:#456c8c;font-size:11px;padding:3px 0}.room-hint:empty{display:none}.room-card .feedback:focus{outline:none}.room-end{text-align:center;border:1px solid #efcfac;background:var(--orange);border-radius:15px;padding:28px 20px;font-size:14px}.room-end p{font-size:12px;line-height:1.8;color:#805d40}.room-end button{margin-top:7px}.questions-view .top-tools .toggle{display:none}
@media(max-height:850px) and (min-width:701px){.side-bottom .little-flower,.side-bottom p{display:none}.side-bottom{padding-top:18px}}
@media(max-width:1100px){.room-tools{grid-template-columns:minmax(0,1fr) auto;gap:18px}.room-jump{grid-column:1/-1}.room-question-grid{grid-template-columns:1fr}}
@media(max-width:700px){.view-nav{margin-top:17px}.view-nav button{font-size:12px;padding:10px}.room-heading{align-items:flex-start;flex-direction:column;gap:16px}.room-heading h1{font-size:35px}.room-heading p{font-size:12px}.room-chapters{gap:6px}.room-chapters button{padding:12px 8px;font-size:11px}.room-chapters button span{font-size:8px}.room-tools{display:flex;flex-direction:column;align-items:stretch;gap:18px;padding:17px}.room-tools .primary{align-self:flex-start}.room-card{padding:20px}.room-card .answer-option{font-size:13px}.room-group-heading{gap:9px}.room-group-heading h2{font-size:17px}.room-group-heading>span:last-child{font-size:9px}.room-group-heading,.room-group,.room-card{scroll-margin-top:76px}#question-room{padding-top:24px}.questions-view .top-tools{display:flex}.room-group-heading h2{scroll-margin-top:76px}}

/* English support and progressive practice levels. */
.question-support{margin:14px 0 20px}.question-english{font-size:15px;line-height:1.7;color:#43566c;margin:10px 0}.difficulty-badge{display:inline-block;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;letter-spacing:.06em;background:#e1edf8;color:#365c7d}.difficulty-badge.medium{background:#ede7f9;color:#66508a}.difficulty-badge.hard{background:#f9e3d8;color:#904e30}.level-tools{margin:20px 0;padding:20px;background:#f5f7fb;border-radius:16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}.level-tools label{font-weight:700}.level-tools select{padding:10px 16px;border:1px solid #c5d1df;border-radius:10px;background:white;color:#344a61;font:inherit}.level-tools p{flex-basis:100%;margin:0;font-size:13px;line-height:1.6}.level-tools span{font-size:13px;color:#53667a}[hidden]{display:none!important}

.keigo-guide{padding:22px;border:1px solid #dae1eb;border-radius:16px;background:#f6f7fc;line-height:1.8;margin:20px 0}.keigo-guide p{margin:8px 0 16px}.keigo-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(240px,1fr);gap:24px;align-items:start}.keigo-layout .options{display:grid;gap:10px}.keigo-layout .option{padding:16px;text-align:left;border:1px solid #c9d6e5;border-radius:12px;background:white;font-size:18px}.keigo-reference{margin:24px 0;padding:22px;border:1px solid #ccd9e8;border-radius:16px;line-height:1.8}.keigo-reference summary{cursor:pointer;font-weight:700}.keigo-table-wrap{overflow-x:auto}.keigo-table-wrap table{width:100%;border-collapse:collapse;white-space:nowrap}.keigo-table-wrap th,.keigo-table-wrap td{padding:14px;text-align:left;border-bottom:1px solid #d8e1ec}.keigo-table-wrap small{font-weight:400}.keigo-layout .feedback{line-height:1.7}.keigo-layout .question-position{margin-top:24px}@media(max-width:850px){.keigo-layout{grid-template-columns:1fr}.keigo-table-wrap td,.keigo-table-wrap th{padding:10px}.view-nav{flex-wrap:wrap}}

.translation-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(240px,1fr);gap:24px;align-items:start}.translation-source{font-size:19px;line-height:1.95;padding:22px;background:#eef4fa;border-radius:14px;margin:20px 0}.translation-label{display:block;font-weight:700;margin:20px 0 10px}#translation-answer{width:100%;box-sizing:border-box;resize:vertical;min-height:180px;padding:16px;border:1px solid #b3c5d9;border-radius:12px;font-family:inherit;font-size:18px;line-height:1.8;background:#fff;color:#263c50}#translation-answer:focus{outline:3px solid #b9d7ed;outline-offset:2px}.translation-model{padding:22px;border-radius:14px;background:#f1eef9;margin:20px 0;line-height:1.85}.translation-model>p[lang]{font-size:18px}.translation-model ul{padding-left:22px}.translation-layout select{max-width:100%;padding:12px;border-radius:10px;background:white;border:1px solid #c5d1df;font:inherit}.translation-layout .question-position{margin-top:24px;gap:12px;flex-wrap:wrap}.view-nav{flex-wrap:wrap}@media(max-width:850px){.translation-layout{grid-template-columns:1fr}.translation-source{font-size:17px;padding:16px}}

.difficulty-badge.exam{background:#ede7f9;color:#66508a}.english-help{padding:12px 15px;border:1px solid #d0dbea;border-radius:10px;margin:12px 0;font-size:14px}.english-help summary{cursor:pointer;color:#476785;font-weight:600}.question-sentence{line-height:1.95!important}.practice-card .question-title{line-height:1.65}.room-card .question-sentence{font-size:17px}

/* Soft peach accents complement the baby blue palette. */
.practice-card{border-color:#efbb86}.practice-card .card-top,.practice-card .section-label,.practice-card .question-position,.practice-card .subtle-button,.room-end p,.room-point,.avatar{color:#50300e!important}.room-end{border-color:#efbb86}

/* Compact page headings and study progress. */
.welcome{padding:20px 0;justify-content:flex-end}.hero-progress{padding:14px 18px;min-width:0;gap:12px}.hero-progress p{margin:0 0 8px}.progress-ring{width:52px;height:52px}.progress-ring>span{width:44px;height:44px;font-size:18px}.room-heading .eyebrow{display:none}.side-bottom{padding-top:20px}@media(max-width:700px){.welcome{padding:16px 0}}

/* Chapter headings share the practice pages’ serif and blue italic styling. */
#chapter-title{font-family:Georgia,"Times New Roman",serif;font-size:clamp(34px,3.5vw,48px);font-weight:400;letter-spacing:-1.6px;line-height:1.2;margin:10px 0 12px}#chapter-title em{font-weight:400;color:#6295bf}@media(max-width:700px){#chapter-title{font-size:35px}}
#te-room{max-width:1100px;margin:0 auto;padding-top:32px}.te-word{font-family:var(--cjk);font-size:30px;line-height:1.8;margin:20px 0}.view-nav button:last-child{grid-column:1/-1}