:root{--navy:#10243a;--ink:#14293e;--blue:#1962d6;--teal:#087f75;--muted:#5a6e80;--line:#dce4ec;--paper:#f3f6fa;--white:#fff;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);font-size:16px;background:var(--paper)}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{outline-offset:4px}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--blue)}button{border:1px solid transparent;border-radius:8px;padding:12px 18px;background:var(--blue);color:white;font-weight:650}button:hover{filter:brightness(.94)}button:disabled{opacity:.5;cursor:not-allowed}.secondary{background:white;color:var(--ink);border-color:var(--line)}.quiet{background:transparent;color:var(--muted);padding:8px 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button{width:100%;text-align:left;line-height:1.5;color:var(--muted);background:transparent;margin-bottom:6px;font-size:.9rem}.module-nav button.active{background:#e8f0fe;color:#174f9b}.lesson{background:white;border:1px solid var(--line);border-radius:12px;padding:36px}.lesson-body{max-width:760px;white-space:pre-line;line-height:1.85;margin:24px 0 36px}.lesson-footer{border-top:1px solid var(--line);padding-top:24px;display:flex;gap:12px;align-items:center;justify-content:space-between}.question{border:0;padding:0;margin:32px 0}.question legend{font-size:1.08rem;font-weight:650;line-height:1.55;margin-bottom:15px}.choice{display:flex;align-items:start;gap:12px;padding:16px;border:1px solid var(--line);border-radius:8px;margin:10px 0;cursor:pointer;line-height:1.5}.choice:has(input:checked){border-color:var(--blue);background:#eef4ff}.choice 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print{.no-print{display:none}.certificate{padding:0}.certificate main{margin:0;border-width:2px;min-height:90vh}body{background:white}}