/* Bounded public tools, sharing the site's ivory / ink / burgundy palette. */
.edu-section{--edu-ink:#201e23;--edu-burgundy:#6f233b;--edu-paper:#fffefa;--edu-line:#ded9d1;background:#f5f1e9;color:var(--edu-ink);border-top:1px solid var(--edu-line)}
.edu-section .wrap{min-width:0}
.edu-section h2{max-width:22ch;margin:0 0 16px;font-size:clamp(2rem,4vw,3.25rem);line-height:1.12;letter-spacing:-.035em}
.edu-intro{max-width:66ch;font-size:1.1rem;line-height:1.65}
.edu-meta{color:#615b59;font-size:.875rem;line-height:1.65;overflow-wrap:anywhere}
.edu-progress{padding-block:16px;border-block:1px solid var(--edu-line);margin:24px 0;font-weight:600}
.edu-lesson-grid,.edu-people-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.edu-lesson-card,.edu-org-card{min-width:0;padding:24px;border:1px solid var(--edu-line);border-radius:14px;background:var(--edu-paper);display:flex;flex-direction:column;align-items:flex-start}
.edu-lesson-card h3,.edu-org-card h3{margin:12px 0 18px;font-size:1.2rem;line-height:1.4;overflow-wrap:anywhere}
.edu-number{font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--edu-burgundy)}
.edu-lesson-card .button{margin-top:auto}
.edu-section .button{min-height:44px;white-space:normal;text-align:center;overflow-wrap:anywhere;max-width:100%}
.edu-section .button.primary{background:var(--edu-burgundy);border-color:var(--edu-burgundy);color:white}
.edu-section button:disabled{cursor:default;opacity:.58}
.edu-section :focus-visible{outline:3px solid var(--edu-burgundy);outline-offset:4px}
.edu-exercise,.edu-contact{margin-top:24px;padding:clamp(20px,4vw,40px);border:1px solid var(--edu-line);border-radius:16px;background:white;max-width:860px;scroll-margin-top:100px}
.edu-exercise[hidden],.edu-contact[hidden],.edu-note-output[hidden]{display:none}
.edu-exercise h3,.edu-contact h3{font-size:1.65rem;line-height:1.3;margin:0 0 12px}
.edu-exercise h4{font-size:1.2rem}
.edu-exercise>.button{margin-block-start:16px;margin-inline-end:10px}
.edu-answers{border:0;padding:0;margin:24px 0;min-width:0;display:flex;gap:12px;flex-wrap:wrap}
.edu-answers legend{padding:0;margin-bottom:18px;font-size:1.13rem;line-height:1.65;max-width:65ch}
.edu-answer{display:flex;align-items:center;gap:10px;min-height:48px;border:1px solid var(--edu-line);border-radius:8px;padding:10px 20px;cursor:pointer;background:var(--edu-paper)}
.edu-answer input{margin:0;inline-size:20px;block-size:20px;accent-color:var(--edu-burgundy)}
.edu-answer:has(input:checked){border-color:var(--edu-burgundy);box-shadow:inset 0 0 0 1px var(--edu-burgundy)}
.edu-feedback{border-inline-start:3px solid var(--edu-burgundy);background:#f9f4f2;padding:18px 20px;margin-top:24px;line-height:1.6}
.edu-feedback.is-correct{border-color:#36664d;background:#f0f6f0}
.edu-feedback p{margin-bottom:0}
.edu-complete{color:#36664d}
.edu-filters{display:grid;grid-template-columns:2fr 1fr;gap:16px;margin-top:24px}
.edu-section label{font-size:.9rem;font-weight:600;line-height:1.5}
.edu-filters input,.edu-filters select,.edu-note-form input,.edu-note-form textarea,.edu-note-output textarea{display:block;width:100%;min-width:0;box-sizing:border-box;background:white;color:var(--edu-ink);border:1px solid #b9afa9;border-radius:8px;padding:12px;font:inherit;font-weight:400;margin-top:8px;min-height:48px}
.edu-note-form textarea,.edu-note-output textarea{resize:vertical;line-height:1.65}
.edu-org-topic{text-transform:uppercase;letter-spacing:.06em;color:var(--edu-burgundy);font-size:.68rem;font-weight:700;margin:0}
.edu-org-card>p{overflow-wrap:anywhere}
.edu-org-card h3+p{font-size:.92rem;margin-top:0}
.edu-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:12px}
.edu-org-card .button{font-size:.8rem;padding-inline:14px}
.edu-empty{grid-column:1/-1;border:1px dashed var(--edu-line);border-radius:12px;padding:24px}
.edu-note-form{display:grid;grid-template-columns:1fr;gap:16px;margin-top:24px}
.edu-note-form>.button{justify-self:start}
.edu-note-output{margin-top:24px;padding-top:20px;border-top:1px solid var(--edu-line)}
.edu-note-output textarea{background:#faf8f3;font-size:.95rem;margin-bottom:16px}
@media(max-width:1000px){.edu-lesson-grid,.edu-people-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.edu-lesson-grid,.edu-people-grid,.edu-filters{grid-template-columns:minmax(0,1fr)}.edu-lesson-card,.edu-org-card{padding:20px}.edu-exercise,.edu-contact{padding:20px}.edu-actions{align-items:stretch;flex-direction:column;width:100%}.edu-actions .button{width:100%}.edu-answers{gap:10px}.edu-answer{flex:1;justify-content:center}.edu-intro{font-size:1rem}}
@media(prefers-reduced-motion:reduce){.edu-section *{scroll-behavior:auto!important}}

/* Explicit English study region. Legacy translated quick checks keep their own scope. */
.study-section{background:#0e1424;color:#e9eefb;border-top:1px solid #33405a;--study-muted:#bcc8df;--study-line:#40516e;--study-accent:#c1b8ff;scroll-margin-top:100px}
.study-section .wrap{min-width:0}
.study-section h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.12;letter-spacing:-.035em;margin:0 0 20px;max-width:22ch}
.study-section h3{font-size:1.35rem;line-height:1.35;margin:0 0 12px;color:#f5f7ff}
.study-section h4{font-size:1.12rem;margin:28px 0 10px;color:#d9d4ff}
.study-section p,.study-checklist{max-width:72ch;line-height:1.75;overflow-wrap:anywhere}
.study-intro{font-size:1.1rem}.study-meta{color:var(--study-muted);font-size:.9rem}
.study-summary{padding:18px 0;border-block:1px solid var(--study-line);margin:24px 0}
.study-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.study-card{min-width:0;display:flex;flex-direction:column;align-items:flex-start;background:#151f33;border:1px solid var(--study-line);padding:24px;border-radius:16px}
.study-card p{color:var(--study-muted);margin-bottom:24px}.study-card .button{margin-top:auto}
.study-section .button{min-height:44px;max-width:100%;white-space:normal;overflow-wrap:anywhere;color:#edf2ff;background:#202e49;border:1px solid #6b7da2;text-align:center}
.study-section .button.primary{background:#d8d2ff;color:#17112e;border-color:#d8d2ff}
.study-section :focus-visible{outline:3px solid #adddff;outline-offset:4px}
.study-section button:disabled{opacity:.6;cursor:default}
.study-lesson{margin-top:28px;padding:clamp(20px,4vw,40px);border:1px solid #627297;border-radius:20px;background:linear-gradient(140deg,#18253d,#131b2e);scroll-margin-top:100px;max-width:960px;min-width:0}
.study-lesson[hidden]{display:none}.study-lesson>h3{font-size:clamp(1.65rem,3vw,2.2rem)}
.study-objective{font-weight:600;color:#d6eaff}.study-lesson>.button{margin-top:20px;margin-right:12px}
.study-options{border:0;padding:0;margin:24px 0;min-width:0;display:grid;gap:12px}
.study-options legend{padding:0;margin-bottom:20px;line-height:1.65;font-weight:600;max-width:70ch}
.study-option{display:flex;align-items:flex-start;gap:14px;padding:16px;background:#111a2c;border:1px solid #667798;border-radius:10px;cursor:pointer;line-height:1.6;min-height:48px}
.study-option input{flex:0 0 20px;width:20px;height:20px;margin:3px 0 0;accent-color:#c1b8ff}
.study-option:has(input:checked){border-color:#cec6ff;box-shadow:inset 0 0 0 1px #cec6ff;background:#272746}
.study-feedback{background:#262940;border-left:3px solid #c1b8ff;border-radius:4px;padding:18px 22px;margin-top:24px;line-height:1.65;max-width:72ch}
.study-feedback.is-correct{border-color:#8cdbc3;background:#162f32}.study-feedback p:last-child{margin-bottom:0}
.study-checklist{padding-left:24px}.study-checklist li{margin:12px 0}
.study-source{border-block:1px solid var(--study-line);margin-top:30px;padding:18px 0}
.study-source summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600;line-height:1.5}
.study-source a{color:#b7ddff;overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:3px}
.study-progress-controls{border:1px solid var(--study-line);border-radius:16px;padding:clamp(20px,3vw,32px);margin-top:32px;background:#121c30;max-width:960px;min-width:0}
.study-save-label{display:flex;gap:12px;align-items:flex-start;line-height:1.6;cursor:pointer;margin:20px 0;max-width:70ch}
.study-save-label input{width:22px;height:22px;flex:0 0 22px;margin-top:2px;accent-color:#c1b8ff}
.study-actions{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.study-import-label{display:block;line-height:1.6;max-width:65ch;margin-top:24px}
.study-import-label input{display:block;max-width:100%;width:100%;box-sizing:border-box;min-height:48px;margin-top:12px;padding:12px;background:#111a2c;color:#e9eefb;border:1px solid #667798;border-radius:8px;font:inherit}
@media(max-width:960px){.study-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.study-grid{grid-template-columns:minmax(0,1fr)}.study-card{padding:20px}.study-actions{flex-direction:column}.study-actions .button{width:100%}.study-option{padding:14px}.study-lesson{padding:20px}.study-lesson>.button{width:100%;margin-right:0}}
@media(prefers-reduced-motion:reduce){.study-section *{scroll-behavior:auto!important}}