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:root{--primary:#5b45c8;--primary-light:#7659d6;--primary-dark:#45349e;--primary-soft:#eeeaff;--primary-softer:#f6f4ff;--page-bg:#fff;--card-bg:#fff;--text-dark:#30303a;--text-light:#6f6d7b;--border:#e4e1eb;--gold:#f5b700;--success:#22c55e;--danger:#ef4444;--white:#fff}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--page-bg);color:var(--text-dark);font-family:Nunito,sans-serif;overflow-x:hidden}button,input,select{font:inherit}.navbar{color:#fff;z-index:1000;isolation:isolate;background:#5b45c8;justify-content:space-between;align-items:center;height:62px;padding:0 5%;transition:background-color .25s,box-shadow .25s,border-color 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.2s;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.homeNavButton:hover{background:#ffffff1f;border-radius:10px}.headerNav,.header-actions{z-index:2;align-items:center;gap:14px;margin-left:auto;display:flex}.classDropdown{justify-content:center;align-items:center;display:flex;position:relative}.classSelectButton{min-width:145px;height:46px;color:var(--text-dark);cursor:pointer;background:#fff;border:none;border-radius:14px;justify-content:space-between;align-items:center;gap:16px;padding:0 16px;font-size:17px;font-weight:700;transition:background .2s,transform .2s;display:flex;box-shadow:0 4px 12px #1e14501f}.classSelectButton:hover{background:#fff;transform:translateY(-1px)}.classButtonContent{align-items:center;gap:9px;display:flex}.graduationIcon{font-size:19px;line-height:1}.dropdownArrow{color:#4f46a5;font-size:18px;transition:transform .25s}.arrowOpen{transform:rotate(180deg)}.classDropdownMenu{z-index:2000;background:#fffffffa;border:1px solid #5b45c824;border-radius:18px;width:200px;padding:10px;animation:.2s dropdownAppear;position:absolute;top:100%;left:50%;right:auto;transform:translate(-50%);box-shadow:0 14px 35px #19143c2e}.classDropdownItem{color:#28283f;text-align:left;cursor:pointer;background:0 0;border:none;border-radius:12px;align-items:center;gap:12px;width:100%;height:50px;padding:0 13px;font-size:16px;font-weight:600;transition:background .18s,color .18s;display:flex}.classDropdownItem:hover{color:var(--primary);background:#5b45c814}.dropdownHat{background:#5b45c814;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:17px;display:flex}.selectedClass{color:var(--primary);background:#5b45c81a;font-weight:700}.selectedCheck{color:var(--primary);margin-left:auto;font-size:17px;font-weight:800}.loginButton{min-width:105px;height:46px;color:var(--primary);cursor:pointer;background:#fff;border:none;border-radius:14px;justify-content:center;align-items:center;padding:0 22px;font-size:18px;font-weight:700;transition:all .2s;display:flex}.loginButton:hover{transform:translateY(-2px);box-shadow:0 8px 20px #00000029}.hero{text-align:center;background-image:linear-gradient(#5b45c81f,#7659d614),url(/hero_bg.webp);background-position:50%;background-repeat:no-repeat;background-size:cover;min-height:410px;padding:72px 20px 150px;position:relative}.heroContent{max-width:850px;margin:0 auto}.heroEyebrow{color:var(--primary);letter-spacing:2px;margin-bottom:14px;font-size:13px;font-weight:700}.hero h1{max-width:850px;color:var(--white);letter-spacing:-2px;margin:0 auto 10px;font-size:clamp(42px,6vw,56px);font-weight:800;line-height:1.08}.heroTitleMain{display:block}.heroTitleFast{color:var(--white);margin-top:2px;font-size:.82em;line-height:1;display:block}.hero h1 span{color:var(--white)}.heroSubtitle{max-width:850px;color:var(--text-dark);margin:0 auto 20px;font-size:18px;line-height:1.6}.searchBox{background:#fff;border:1px solid #0000004d;border-radius:18px;align-items:center;width:min(720px,100%);height:68px;margin:auto;transition:all .2s;display:flex;overflow:hidden;box-shadow:0 10px 30px #48369633}.searchBox:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px #5b45c81a,0 12px 30px #4836961f}.searchIcon{color:var(--primary);padding-left:24px;font-size:28px}.searchBox input{width:100%;height:100%;color:var(--text-dark);background:0 0;border:none;outline:none;flex:1;padding:0 22px;font-size:18px}.searchBox input::placeholder{color:#9a96a6}.searchBox button{border:none;border-left:1px solid var(--border);width:72px;height:100%;color:var(--primary);cursor:pointer;background:#fff;font-size:32px}.subjectsSection{background:var(--page-bg);height:95px;position:relative}.subjectsPanel{z-index:10;background:#fffffffa;border-radius:22px;grid-template-columns:repeat(5,1fr);gap:15px;width:min(1050px,92%);min-height:80px;padding:18px 22px;display:grid;position:absolute;top:-60px;left:50%;transform:translate(-50%);box-shadow:0 14px 38px #3b2b8224}.subjectButton{color:#45414e;cursor:pointer;background:0 0;border:none;border-radius:18px;flex-direction:column;justify-content:center;align-items:center;gap:5px;min-height:80px;font-size:16px;font-weight:700;transition:all .2s;display:flex}.subjectEmoji{background:var(--primary-soft);border-radius:30%;justify-content:center;align-items:center;width:45px;height:45px;font-size:26px;transition:all .2s;display:flex}.subjectButton:hover{background:var(--primary-softer);transform:translateY(-3px)}.subjectButton:hover .subjectEmoji{transform:scale(1.05)}.subjectButton.activeSubject,.activeSubject{transform:translateY(-2px);box-shadow:0 8px 20px #4a37a547;color:#fff!important;background:linear-gradient(145deg,#5543ad,#7659d6)!important}.subjectButton.activeSubject .subjectEmoji{box-shadow:0 5px 14px #0000001f;background:#fff!important}.subjectButton.activeSubject{color:#fff!important}.filters{background:#fff;flex-wrap:wrap;justify-content:center;align-items:center;gap:18px;padding:18px 20px 28px;display:flex}.filters button{min-width:128px;color:var(--text-dark);cursor:pointer;background:#fff;border:1px solid #cfc7ef;border-radius:14px;padding:13px 22px;transition:all .2s}.filters button:hover{background:var(--primary-soft);transform:translateY(-2px)}.filters .classButton{background:var(--primary);color:#fff;border-color:var(--primary)}.classButton{appearance:none;cursor:pointer;text-align:center;padding-right:45px}.homepageContent{grid-template-columns:minmax(0,1fr) 300px;gap:28px;width:min(1400px,92%);margin:0 auto;padding:32px 0 50px;display:grid}.popularNotesSection{min-width:0}.sectionHeading{justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:22px;display:flex}.sectionEyebrow{color:var(--primary);letter-spacing:1.8px;margin-bottom:5px;font-size:11px;font-weight:700}.sectionHeading h2{color:var(--text-dark);letter-spacing:-.7px;font-size:30px;font-weight:700}.dynamicNotesTitle{align-items:baseline;display:flex}.subjectTitle{font-size:inherit;font-weight:inherit;color:var(--text-dark)}.titleSeparator{color:#9a96a6;margin:0 7px;font-size:18px;font-weight:400}.classTitle{color:var(--text-light);font-size:17px;font-weight:500}.dynamicNotesTitle .star{color:var(--gold);margin-left:7px;font-size:22px}.seeAllButton{background:var(--primary-soft);color:var(--primary);cursor:pointer;border:none;border-radius:10px;padding:10px 16px;font-size:14px;font-weight:700;transition:all .2s}.seeAllButton:hover{background:var(--primary);color:#fff}.notesGrid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;display:grid}.noteCardLink *{text-decoration:none}.noteCard{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:18px;transition:all .25s;overflow:hidden;box-shadow:0 5px 16px #281e500f}.noteCard:hover{border-color:#5b45c840;transform:translateY(-6px);box-shadow:0 16px 32px #37288224}.noteImage{aspect-ratio:16/9;background:var(--primary-softer);justify-content:center;align-items:center;width:100%;display:flex;position:relative;overflow:hidden}.noteImage img{object-fit:cover;width:100%;height:100%;transition:transform .3s;display:block}.noteCard:hover .noteImage img{transform:scale(1.05)}.noteImage>span:not(.noteSubjectBadge){font-size:50px}.noteSubjectBadge{color:var(--primary);background:#fffffff0;border-radius:20px;padding:6px 10px;font-size:11px;font-weight:700;position:absolute;top:10px;left:10px}.noteCardContent{padding:12px 16px 14px}.noteCard h3{min-height:44px;color:var(--text-dark);font-size:17px;line-height:1.3}.noteCardBottom{color:var(--text-light);justify-content:space-between;align-items:center;margin-top:2px;font-size:13px;display:flex}.exploreArrow{background:var(--primary-soft);width:30px;height:30px;color:var(--primary);border-radius:50%;justify-content:center;align-items:center;font-size:20px;font-weight:700;display:flex}.trending{background:var(--page-bg);padding:28px 4% 40px}.trending h2{margin-bottom:20px;font-size:30px}.viewMoreWrapper{justify-content:center;margin-top:26px;display:flex}.viewMore{color:var(--primary);cursor:pointer;background:#fff;border:1px solid #cfc7ef;border-radius:10px;padding:11px 26px;font-weight:600;transition:all .2s}.viewMore:hover{background:var(--primary);color:#fff}.homepageSidebar{flex-direction:column;gap:22px;display:flex}.dailyChallengeCard{color:#fff;background:linear-gradient(145deg,#5543ad,#7659d6);border-radius:26px;padding:30px;box-shadow:0 14px 30px #4a37a538}.sidebarTop{justify-content:space-between;align-items:center;margin-bottom:28px;display:flex}.sidebarLabel{letter-spacing:1.5px;font-size:12px;font-weight:700}.challengeIcon,.learningIcon{font-size:28px}.dailyChallengeCard h3{margin-bottom:12px;font-size:30px;line-height:1.2}.dailyChallengeCard p{color:#ffffffd1;margin-bottom:28px;font-size:16px;line-height:1.65}.challengeButton{color:#554798;cursor:pointer;background:#f4f3f7;border:none;border-radius:16px;width:100%;padding:16px;font-size:17px;font-weight:700;transition:all .2s}.challengeButton:hover{background:#fff;transform:translateY(-2px);box-shadow:0 7px 18px #00000029}.learningCard{border:1px solid var(--border);background:#fff;border-radius:22px;padding:24px;box-shadow:0 8px 24px #281e500f}.learningCard .sidebarLabel{color:var(--text-light)}.learningLevel{align-items:center;gap:14px;margin-bottom:20px;display:flex}.levelNumber{background:var(--primary-soft);width:50px;height:50px;color:var(--primary);border-radius:15px;justify-content:center;align-items:center;font-size:24px;font-weight:700;display:flex}.learningLevel p{color:var(--primary);margin-bottom:3px;font-size:13px;font-weight:700}.learningLevel 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span{background:#85818d;flex:1;height:1px}.footerTitle p{letter-spacing:2px;font-size:12px}.footerContent{max-width:1200px;margin:0 auto}.footerLogo{letter-spacing:1px;margin-bottom:8px;font-size:18px;font-weight:600}.footerLinks{flex-wrap:wrap;align-items:center;gap:9px;font-size:15px;display:flex}.footerLinks button{color:var(--text-dark);cursor:pointer;background:0 0;border:none;transition:all .2s}.footerLinks button:hover{color:var(--primary)}.about{max-width:440px}.footerDivider{background:#c5c2cb;width:1px;height:95px}.footerBrand{text-align:left}.fullNotePage{z-index:5000;background:#f7f7fa;flex-direction:column;width:100%;min-height:100vh;display:flex;position:absolute;top:0;left:0;overflow:visible}.notePageNavbar{z-index:20;border-bottom:1px solid var(--border);flex-shrink:0;position:relative}.notePageInfoBar{z-index:100;background:#fffffff5;border-bottom:1px solid #e5e3eb;flex-shrink:0;justify-content:space-between;align-items:center;width:100%;min-height:88px;padding:0 4%;display:flex;position:sticky;top:0;box-shadow:0 2px 10px #281e500a}.backToNotesTop{min-width:120px;height:50px;color:var(--primary);background:#fff;border:1px solid #c9c5dd;border-radius:15px;justify-content:center;align-items:center;gap:9px;padding:0 21px;font-size:16px;font-weight:800;transition:all .2s;display:inline-flex;box-shadow:0 4px 12px #1e144608}.backToNotesTop:hover{background:#e6e4f2;transform:translateY(-1px);box-shadow:0 5px 14px #4f4b911f}.backArrow{font-size:22px;font-weight:500}.noteTopbarTitle{text-align:center;pointer-events:none;width:min(500px,40%);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.noteTopbarTitle p{color:var(--primary);letter-spacing:.7px;margin-bottom:4px;font-size:14px;font-weight:800}.noteTopbarTitle h1{text-overflow:ellipsis;white-space:nowrap;color:var(--text-dark);letter-spacing:-.5px;font-size:30px;font-weight:800;overflow:hidden}.noteTopbarActions{align-items:center;gap:12px;margin-left:auto;display:flex}.topListenButton,.topQuizButton{cursor:pointer;border-radius:15px;justify-content:center;align-items:center;gap:9px;height:50px;padding:0 21px;font-size:16px;font-weight:800;transition:transform .2s,box-shadow .2s,background .2s;display:inline-flex}.topListenButton{color:var(--primary);background:#fff;border:1px solid #ddd9e5;box-shadow:0 4px 12px #1e144608}.topListenButton:hover{background:var(--primary-soft);transform:translateY(-2px);box-shadow:0 8px 18px #5b45c81f}.topListenButton.listening{background:var(--primary);border-color:var(--primary);color:#fff}.listenIcon{font-size:19px}.topQuizButton{color:#fff;background:linear-gradient(135deg,#5b45c8,#7659d6);border:none;box-shadow:0 7px 15px #5b45c833}.topQuizButton:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 12px 25px #5b45c84d}.quizTargetIcon{font-size:21px}.topQuizButton.quizDisabled{opacity:.55;cursor:not-allowed;box-shadow:none}.fullNoteContent{background:linear-gradient(#f7f7fa 0%,#f1f1f5 100%);justify-content:center;align-items:flex-start;width:100%;padding:38px 30px 60px;display:flex;overflow:visible}.fullNoteImageWrapper{justify-content:center;width:min(1080px,100%);margin:0 auto;animation:.35s noteAppear;display:flex}.fullNoteImage{object-fit:contain;background:#fff;border:1px solid #463c6424;border-radius:18px;width:100%;max-width:1080px;height:auto;display:block;box-shadow:0 14px 40px #1e193c24}@keyframes noteAppear{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fullNotePlaceholder{text-align:center;border:1px solid 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#0003}.backToTopButton:active{transform:translateY(0)}.backToTopButton span{font-size:10px;font-weight:700}.backToTopButton{font-size:20px;font-weight:700}@media (max-width:600px){.backToTopButton{border-radius:14px;width:48px;height:48px;bottom:20px;right:18px}}.notePageFooter{color:#666b78;background:#ececf1;border-top:1px solid #0000000d;justify-content:flex-end;align-items:center;width:100%;min-height:72px;padding:0 7%;font-size:14px;display:flex}@media (max-width:700px){.notePageFooter{text-align:center;justify-content:center;min-height:60px;padding:0 20px;font-size:13px}}.resultActions{flex-wrap:wrap;justify-content:center;align-items:center;gap:14px;margin-top:24px;display:flex}.showAnswersButton{color:#fff;cursor:pointer;background:linear-gradient(135deg,#6c63ff,#8b5cf6);border:none;border-radius:12px;padding:13px 24px;font-size:15px;font-weight:700;transition:transform .2s,box-shadow .2s;box-shadow:0 8px 20px #6c63ff40}.showAnswersButton:hover{transform:translateY(-2px);box-shadow:0 12px 25px #6c63ff59}.answersReview{width:100%;max-width:1400px;margin:0 auto;padding:0 20px;animation:.3s fadeInAnswers}@keyframes fadeInAnswers{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.answersReviewHeader{justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px;display:flex}.answersReviewHeader h2{color:#1f2937;margin:3px 0 4px;font-size:25px;font-weight:800}.answersReviewHeader p{color:#6b7280;margin:0;font-size:14px}.hideAnswersButton{color:#4f46e5;cursor:pointer;white-space:nowrap;background:#fff;border:1px solid #d7dce8;border-radius:10px;padding:9px 15px;font-size:13px;font-weight:700;transition:all .2s}.hideAnswersButton:hover{background:#f5f3ff;border-color:#a78bfa}.answersReviewList{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.answerReviewCard{background:#fff;border:1px solid #e8eaf0;border-radius:14px;padding:20px;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 14px #0000000a}.answerReviewCard:hover{transform:translateY(-2px);box-shadow:0 8px 20px #00000012}.reviewCorrect{border-left:4px solid #22c55e}.reviewWrong{border-left:4px solid #ef4444}.reviewQuestionNumber{text-transform:uppercase;letter-spacing:.5px;color:#6b7280;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;font-size:12px;font-weight:800;display:flex}.reviewStatusCorrect,.reviewStatusWrong{text-transform:none;letter-spacing:0;border-radius:20px;padding:4px 9px;font-size:11px;font-weight:700}.reviewStatusCorrect{color:#15803d;background:#dcfce7}.reviewStatusWrong{color:#dc2626;background:#fee2e2}.answerReviewCard h3{color:#1f2937;min-height:44px;margin:0 0 14px;font-size:15px;line-height:1.45}.answerReviewCard{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:16px;display:grid}.reviewQuestionNumber,.answerReviewCard h3{grid-column:1/-1}.reviewAnswerRow{flex-direction:column;gap:5px;margin:0;display:flex}.reviewAnswerLabel{text-transform:uppercase;letter-spacing:.5px;color:#9ca3af;font-size:10px;font-weight:800}.reviewAnswer{border-radius:9px;min-height:38px;padding:9px 10px;font-size:13px;font-weight:600;line-height:1.35;display:block}.studentCorrect{color:#047857;background:#ecfdf5;border:1px solid #a7f3d0}.studentWrong{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}.correctReviewAnswer{color:#2563eb;background:#eff6ff;border:1px solid #bfdbfe}.reviewBackButton{margin-top:22px}@media (max-width:900px){.answersReviewList{grid-template-columns:1fr}}@media (max-width:600px){.fullQuizContent{padding:20px 15px}.modernQuizCard{width:100%}.answersReviewHeader{flex-direction:column;align-items:stretch;gap:12px}.answersReviewHeader h2{font-size:22px}.hideAnswersButton{width:100%}.answerReviewCard{grid-template-columns:1fr;padding:14px}.reviewQuestionNumber,.answerReviewCard h3{grid-column:auto}.reviewQuestionNumber{align-items:flex-start}.reviewAnswer{padding:9px 10px}}