@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#142f31;--muted:#667b78;--teal:#0b6860;--lime:#d6f382;--paper:#f5f7f2;--line:#dce4dd;--white:#fff;--red:#b43b3b}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px 'DM Sans',Arial,sans-serif}header{max-width:1240px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:27px 34px;border-bottom:1px solid var(--line)}a{color:var(--teal)}.brand{text-decoration:none;color:var(--ink);display:flex;gap:11px;align-items:center;font:bold 26px Manrope,Arial}.brand-icon{background:var(--teal);color:white;border-radius:12px;padding:8px 9px;font-size:24px;position:relative}.brand-icon span{font-size:17px;color:var(--lime)}.daily{font-weight:400}.brand small{display:block;font:8px 'DM Sans',Arial;letter-spacing:1.3px;margin-top:3px}.header-label{font-size:10px;letter-spacing:1.6px;font-weight:700;display:flex;gap:14px;align-items:center}.live-dot{width:6px;height:6px;background:var(--teal);border-radius:50%}main{max-width:1172px;margin:auto;padding:0 20px}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:65px;padding:58px 0 40px;align-items:center}.eyebrow{font-size:11px;font-weight:700;letter-spacing:1.8px;color:var(--teal);text-transform:uppercase}.pill{display:inline-block;border:1px solid #a8c2b9;border-radius:20px;padding:7px 12px;font-size:10px;letter-spacing:1.5px}h1{font:800 clamp(36px,4.7vw,58px)/1.12 Manrope,Arial;letter-spacing:-2px;margin:20px 0}h1 em{font-style:normal;color:var(--teal)}.intro{color:var(--muted);line-height:1.8;max-width:550px;font-size:15px}.hero-art{height:270px;background:var(--teal);border-radius:22px;position:relative;overflow:hidden;color:#c5e4d5;padding:28px;transform:rotate(1deg)}.hero-art:before{content:'';position:absolute;inset:0;background-image:linear-gradient(#ffffff0c 1px,transparent 1px),linear-gradient(90deg,#ffffff0c 1px,transparent 1px);background-size:27px 27px}.formula{position:absolute;right:25px;bottom:20px;font:italic 42px Georgia;color:var(--lime)}.orbit{position:absolute;border:1px solid #92b8a3;border-radius:50%;width:185px;height:90px;top:70px;left:80px;transform:rotate(-35deg)}.orbit.two{transform:rotate(40deg)}.orbit.three{transform:rotate(95deg)}.nucleus{position:absolute;top:101px;left:159px;width:30px;height:30px;border-radius:50%;background:var(--lime);box-shadow:0 0 35px #d6f36544}.art-label{font-size:10px;letter-spacing:2px;position:relative}.art-number{position:absolute;bottom:28px;font-size:11px;line-height:1.6;letter-spacing:1px}.section-heading{display:flex;justify-content:space-between;align-items:center;margin:16px 0 22px}.section-heading h2{font:800 22px Manrope;margin:0}.muted{color:var(--muted)}.small{font-size:12px}.papers{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.paper-card{background:white;border:1px solid var(--line);border-radius:16px;padding:25px;transition:transform .2s}.paper-card:hover{transform:translateY(-3px);border-color:#87b4a2}.card-top{display:flex;justify-content:space-between;align-items:center}.year{font:800 40px Manrope;letter-spacing:-2px}.badge{font-size:9px;letter-spacing:1px;background:#eff4ed;color:var(--teal);padding:6px 8px;border-radius:5px}.paper-card h3{font-size:16px;margin:18px 0 5px}.card-desc{font-size:12px;color:var(--muted);margin:0 0 20px}.facts{display:flex;gap:16px;border-top:1px solid var(--line);padding:17px 0;color:var(--muted);font-size:12px}button,.button{cursor:pointer;border:0;background:var(--teal);color:white;border-radius:8px;padding:13px 18px;font:600 13px 'DM Sans',Arial;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:12px}button:hover,.button:hover{filter:brightness(.94)}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #c5a527;outline-offset:3px}button:disabled{opacity:.45;cursor:default}.wide{width:100%}.secondary{background:white;color:var(--ink);border:1px solid var(--line)}.text-button{background:transparent;color:var(--teal);padding:8px 0}.guide{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:29px 0;margin:30px 0 0;border-top:1px solid var(--line)}.guide-item{display:flex;gap:12px}.guide-num{font:800 22px Manrope;color:#95b1a0}.guide h3{margin:0 0 6px;font-size:13px}.guide p{font-size:12px;color:var(--muted);line-height:1.7;margin:0}.notice{font-size:11px;color:var(--muted);line-height:1.7;padding-bottom:25px}footer{max-width:1172px;margin:20px auto 0;padding:25px 20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}footer a{text-decoration:none}.quiz-top{padding:26px 0 18px;display:flex;justify-content:space-between;align-items:center}.quiz-top h1{font-size:28px;letter-spacing:-1px;margin:8px 0}.timer{background:white;border:1px solid var(--line);border-radius:9px;padding:13px 18px;font-variant-numeric:tabular-nums;font-size:20px;font-weight:700}.quiz-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:25px;align-items:start}.sidebar{background:white;border:1px solid var(--line);padding:20px;border-radius:12px;position:sticky;top:15px}.progress-track{background:#edf2ec;height:5px;border-radius:6px;margin:12px 0 20px}.progress-fill{height:100%;background:var(--teal);border-radius:6px}.nav-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:5px;margin:15px 0}.nav-grid button{padding:7px 0;font-size:10px;background:#f0f3ed;color:var(--muted);border:1px solid transparent;border-radius:5px}.nav-grid button.answered{background:#dcece3;color:var(--teal)}.nav-grid button.current{border:2px solid var(--teal);padding:6px 0}.nav-grid button.wrong{background:#f9e5e1;color:var(--red)}.nav-grid button.correct{background:#d8edce;color:#28592e}.legend{font-size:10px;color:var(--muted);line-height:1.7}.question-card{background:white;border:1px solid var(--line);padding:32px;border-radius:14px;min-height:440px}.question-meta{display:flex;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted);margin-bottom:22px}.question-card h2{font:700 20px/1.55 Manrope;margin:0 0 25px;white-space:pre-line}.option{display:flex;align-items:flex-start;gap:14px;border:1px solid var(--line);border-radius:9px;padding:15px;margin:11px 0;cursor:pointer;line-height:1.6;font-size:14px;white-space:pre-line}.option:hover{border-color:#88ad9d}.option.selected{border:2px solid var(--teal);padding:14px;background:#edf6f0}.option input{position:absolute;opacity:0}.letter{flex:0 0 27px;height:27px;border-radius:6px;background:#edf1ea;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}.selected .letter{background:var(--teal);color:white}.option.correct{border-color:#588446;background:#f0f8e9}.option.incorrect{border-color:#ce7470;background:#fff3ef}.actions{display:flex;justify-content:space-between;gap:12px;margin-top:24px;flex-wrap:wrap}.explanation{background:#eef5e9;border-left:3px solid #629346;padding:18px;margin-top:20px;font-size:14px;line-height:1.8;white-space:pre-line}.explanation strong{display:block}.source{margin:22px 0 0;border-top:1px solid var(--line);padding-top:16px}.source summary{cursor:pointer;font-size:12px;color:var(--teal);font-weight:600}.source img{width:100%;margin-top:12px;border:1px solid var(--line)}.source-tools{display:flex;gap:20px;font-size:12px;margin:14px 0}.status{font-size:12px;color:var(--muted);min-height:18px}.result-hero{background:var(--teal);color:white;border-radius:18px;margin:30px 0;padding:32px;display:flex;gap:35px;align-items:center;justify-content:space-between}.result-hero h1{font-size:32px;letter-spacing:-1px;margin:8px 0}.result-hero p{font-size:13px;color:#c4ded1;line-height:1.7}.score{font:800 58px Manrope;color:var(--lime)}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px}.panel{background:white;padding:26px;border:1px solid var(--line);border-radius:12px}.panel h2{font:800 18px Manrope;margin:0 0 22px}.topic-row{display:flex;justify-content:space-between;font-size:13px;margin-top:14px}.review-toolbar{display:flex;gap:12px;align-items:center;margin:25px 0;flex-wrap:wrap}select{padding:11px;border:1px solid var(--line);border-radius:7px;background:white;color:var(--ink);font:13px 'DM Sans'}.review-item{background:white;border:1px solid var(--line);padding:20px;border-radius:10px;margin:12px 0}.review-item p{font-size:13px;line-height:1.6}.review-item button{font-size:11px;padding:8px 12px}dialog{border:1px solid var(--line);border-radius:15px;max-width:460px;padding:28px;color:var(--ink)}dialog::backdrop{background:#142f3177}dialog h2{font:800 23px Manrope}dialog p{line-height:1.7;color:var(--muted)}.resume{font-size:11px;color:var(--teal);margin:12px 0 0}.warning{color:var(--red)}@media(max-width:800px){.hero{gap:25px;grid-template-columns:1.4fr 1fr}.hero-art{height:230px}.orbit{left:15px}.nucleus{left:94px}.papers{gap:10px}.paper-card{padding:18px}.facts{gap:9px;font-size:10px}.quiz-layout{grid-template-columns:175px 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