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.option-tile.option-tile--preview-correct:not(.option-tile--flag):after{content:"";position:absolute;top:-120%;left:-20%;width:28%;height:280%;background-color:color-mix(in srgb,var(--cc-color) 44%,#fff 56%);opacity:0;transform:rotate(45deg);transform-origin:center center;pointer-events:none;mix-blend-mode:soft-light;animation:mc-option-reflect-shine 2.1s ease-in-out infinite;animation-delay:0s}@media(prefers-reduced-motion:reduce){.lesson-preview .options-bank .option-tile.option-tile--preview-correct:not(.option-tile--flag):after{animation:none;opacity:0}}.lesson-preview .sentence-prompt{font-size:1.4rem;font-weight:500;margin-bottom:20px;padding:15px;background:var(--colormix);border-radius:var(--answer-border-radius, 12px);text-align:center;user-select:none;-webkit-user-select:none}.lesson-preview .sentence-construction-area{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px;justify-content:left;min-height:80px;border-bottom:2px solid var(--colormix);padding:10px;user-select:none;-webkit-user-select:none}.lesson-preview .matching-wrapper{display:flex;flex-direction:column;gap:12px;width:100%;justify-content:center;margin-top:10px}.lesson-preview .sentence-construction-area .option-tile{border-color:var(--cc-color)}.lesson-preview .matching-row{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:10px;align-items:stretch}.lesson-preview .matching-equals{display:grid;place-items:center;min-width:22px;color:var(--text-muted-color);font-weight:700;font-size:1.1rem;user-select:none;-webkit-user-select:none}.lesson-preview .match-card{padding:12px 14px;border:2px solid var(--bg2);border-radius:var(--answer-border-radius, 12px);background:var(--bg);box-shadow:0 4px 0 var(--bg1);text-align:center;font-size:1.05rem;height:auto;min-height:48px;display:flex;align-items:center;justify-content:center;line-height:1.25;word-break:break-word;overflow:visible;user-select:none;-webkit-user-select:none;caret-color:transparent}.lesson-preview .code-card--preview{width:100%;max-width:640px;margin:16px auto 0;border-radius:14px;border:3px solid var(--bg2);background:var(--bg);box-sizing:border-box;overflow:hidden}.lesson-preview .code-card--preview .code-card-head{padding:8px 12px;background:var(--bg2)}.lesson-preview .code-card--preview .code-card-lang{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:.85rem;font-weight:600;color:var(--cc-color);text-transform:lowercase}.lesson-preview .code-card--preview .code-card-body{padding:12px 10px 14px;background:var(--bg)}.lesson-preview .code-card--preview .code-card-body--fill{padding:10px 12px 12px}.lesson-preview 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6px;vertical-align:middle;border-radius:6px;border:none;box-shadow:none;background:var(--bg1);font-family:inherit;font-size:.92em;font-weight:600;line-height:1.2}.lesson-preview .code-token-slot.code-token-slot--filled{border:1px solid var(--cc-color);background:color-mix(in srgb,var(--cc-color) 14%,var(--bg))}.lesson-preview .code-token-bank.options-bank--gap-inline{width:100%;max-width:640px;margin:18px auto 0;padding:0 4px 10px;box-sizing:border-box}.lesson-preview .code-token-option-tile--preview{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-weight:600;font-size:1.05rem;line-height:1.25;pointer-events:none;opacity:.88;color:var(--text-muted-color)}.lesson-preview .solve-with-me-preview{display:flex;flex-direction:column;gap:12px;margin-top:6px;text-align:left}.lesson-preview .solve-with-me-preview-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.lesson-preview 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#8aa0b0);font-weight:700;font-size:1.1rem;min-width:20px;user-select:none;-webkit-user-select:none}.matching-row .match-card{min-width:0}.match-card{padding:10px;border:2px solid var(--bg2);border-radius:var(--answer-border-radius);text-align:center;cursor:pointer;box-shadow:0 3px 0 var(--bg2);transition:.2s;background:var(--bg);display:flex;align-items:center;justify-content:center;min-height:80px;font-size:1.2rem;-webkit-user-select:none;user-select:none;overflow:visible;overflow-wrap:break-word;word-break:break-word;white-space:normal;hyphens:none;-webkit-hyphens:none}.match-card.match-card--flag{padding:10px}.match-card-flag-wrap{width:100%;min-height:58px;display:flex;align-items:center;justify-content:center}.match-card-flag-wrap .flag-choice-img{width:auto;height:auto;max-width:100%;max-height:min(72px,14vh);object-fit:contain}.match-card>*{max-width:100%;overflow:visible;text-overflow:clip;white-space:normal}.match-card.selected{border-color:var(--cc-color);box-shadow:0 3px 0 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p{color:var(--text-muted-color);max-width:400px}.finish-container .check-btn,.practice-intro-container .check-btn{margin-top:20px}#lesson-footer{flex:0 0 auto;height:auto;min-height:140px;box-sizing:border-box;border-top:3px solid var(--bg2);display:flex;align-items:center;justify-content:center;transition:.3s;padding:30px 0 max(40px,env(safe-area-inset-bottom,0px));background-color:var(--bg)}.hw-end-footer{flex-direction:column;align-items:stretch;justify-content:flex-start;gap:12px;width:100%;max-width:900px;padding:0 20px;box-sizing:border-box}.hw-end-finish-btn{order:1;margin:0;padding:10px 12px;border:none;border-radius:12px;background:transparent;color:var(--text-muted-color);font-family:var(--font-family);font-size:.95rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:color .15s,background .15s}.hw-end-finish-btn:hover{color:var(--text-color);background:var(--colormix, 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.message{color:var(--text-color);font-size:.9rem;margin-top:4px}.feedback-report-icon-btn{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;gap:6px;margin:0;padding:6px 10px;border:none;border-radius:12px;background:transparent;color:var(--text-color);cursor:pointer;font:inherit;font-weight:700;font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;-webkit-tap-highlight-color:transparent}.feedback-report-icon-btn:hover{background:var(--bg2)}.feedback-report-icon-btn .material-symbols-rounded{font-size:26px;line-height:1;font-variation-settings:"FILL" 1,"wght" 800,"GRAD" 0,"opsz" 50}#lesson-footer.skipped-footer .feedback-report-icon-btn{color:var(--text-color);opacity:.9}#lesson-footer.skipped-footer .feedback-report-icon-btn:hover{background:color-mix(in srgb,var(--colormix) 55%,transparent);opacity:1}.check-btn.correct-btn{background-color:var(--st-correct);box-shadow:0 4px 0 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.feedback-icon{font-size:2.5rem;line-height:1;flex-shrink:0}#lesson-content{padding:0 15px 120px;align-items:stretch}#lesson-footer{position:fixed;bottom:0;left:0;right:0;z-index:200;padding:10px 0 calc(max(15px,env(safe-area-inset-bottom,0px)) + 6px);min-height:auto;max-height:min(88vh,100%);overflow-y:auto;-webkit-overflow-scrolling:touch}.hw-end-footer{padding:0 10px;gap:10px}.skip-btn{display:none}.footer-buttons{flex-direction:row;align-items:center;gap:10px;padding:0 15px}.footer-left-actions{flex:0 0 auto}.footer-buttons.mobile-no-context .footer-left-actions{display:none}.check-btn{width:auto;min-width:0;flex:1 1 auto;flex-grow:1}.check-btn.skip-style,.footer-buttons.mobile-no-context .check-btn{width:100%;flex:1 1 100%}.footer-buttons.feedback-shown{flex-direction:column;align-items:stretch;gap:10px}.footer-buttons.feedback-shown 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