:root{color:#233d36;font-synthesis:none;--paper:#fff;--line:#dde4dd;--muted:#617269;--green:#315a4b;--tint:#eaf0e9;background:#f7f8f4;font-family:Malgun Gothic,Apple SD Gothic Neo,sans-serif;font-size:16px;line-height:1.65}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{border:1px solid var(--line);background:var(--paper);min-height:44px;color:inherit;cursor:pointer;border-radius:12px;padding:10px 18px}button:hover{border-color:var(--green);background:var(--tint)}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline-offset:4px;outline:3px solid #bd7b28}a{color:var(--green)}h1,h2,h3,p{margin-top:0}h1{letter-spacing:-1px;margin-bottom:20px;font-size:2rem}h2{font-size:1.35rem;line-height:1.6}h3{font-size:1.05rem}p{margin-bottom:16px}small,.muted{color:var(--muted)}.shell{max-width:1200px;margin:auto;padding:0 36px}header{justify-content:space-between;align-items:center;gap:20px;padding:25px 0;display:flex}.brand{align-items:center;gap:10px;font-size:1.2rem;font-weight:750;text-decoration:none;display:flex}.brand-mark{background:var(--green);color:#fff;border-radius:11px;padding:3px 10px}.brand-sub{color:var(--muted);margin-left:12px;font-size:.75rem;font-weight:400}.offline{color:var(--muted);font-size:.75rem}.draft{color:#66532a;background:#faf4df;border:1px solid #e0d7b5;border-radius:9px;padding:9px 16px;font-size:.8rem}.layout{grid-template-columns:180px 1fr;gap:44px;margin-top:28px;display:grid}nav{flex-direction:column;gap:8px;padding-top:16px;display:flex}nav button{text-align:left;background:0 0;border-color:#0000;font-size:.9rem}nav button.active{background:var(--tint);color:var(--green);font-weight:700}.nav-footer{color:var(--muted);margin-top:60px;padding:16px;font-size:.85rem}main{min-width:0;padding:0 0 30px}.toolbar{color:var(--muted);justify-content:space-between;align-items:center;gap:15px;margin-bottom:20px;font-size:.8rem;display:flex}select{background:var(--paper);color:inherit;border:1px solid var(--line);border-radius:9px;min-height:44px;margin-left:8px;padding:4px 10px}.hero{background:linear-gradient(120deg,#edf3e9,#f1f3e8);border:1px solid #d5e2d6;border-radius:20px;padding:32px 36px}.eyebrow{color:var(--muted);letter-spacing:.03em;font-size:.8rem}.hero h1{margin-bottom:10px;font-size:2.25rem}.hero p{color:var(--muted);font-size:.9rem}.hero-bottom{justify-content:space-between;align-items:flex-end;gap:20px;margin-top:28px;display:flex}.hero-bottom strong{margin-right:12px;font-size:3rem;line-height:1.2}.hero-bottom span{font-size:.85rem}.primary{background:var(--green);color:#fff;border-color:var(--green)}.primary:hover{color:#fff;background:#244637}.wide{width:100%}.metrics{grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0 32px;display:grid}.metrics article{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:20px}.metrics strong{font-size:1.65rem;display:block}.metrics span{color:var(--muted);font-size:.8rem}.study-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.study{text-align:left;padding:25px}.study p{color:var(--muted);font-size:.85rem}.study>span:last-child{font-size:.8rem;font-weight:700}.icon{background:var(--tint);border-radius:12px;justify-content:center;align-items:center;min-width:42px;min-height:42px;margin-bottom:20px;font-size:1.2rem;display:inline-flex}.note{color:var(--muted);background:var(--tint);border-radius:12px;margin-top:24px;padding:18px 22px;font-size:.8rem}.paper{background:var(--paper);border:1px solid var(--line);border-radius:18px;margin:16px 0;padding:28px}.heading{justify-content:space-between;align-items:center;gap:16px;display:flex}.heading h1{margin-bottom:8px}.paper h2{margin:22px 0}.bookmark{white-space:nowrap;padding:8px 12px;font-size:.8rem}.answer{background:var(--tint);border-radius:12px;margin:22px 0;padding:22px}.answer p:last-child{margin-bottom:0}.answer ol{padding:0;font-size:.9rem;list-style:none}.answer li{margin:9px 0}.answer li b{margin-right:8px}.sources{border-top:1px solid var(--line);margin-top:24px;padding-top:16px;font-size:.8rem}.sources summary{cursor:pointer;min-height:44px;padding:10px 0;display:list-item}.sources article{overflow-wrap:anywhere;padding-top:14px}.sources p{color:var(--muted)}.actions{justify-content:space-between;gap:12px;display:flex}.choices{gap:10px;margin:24px 0;display:grid}.choice{text-align:left;align-items:center;gap:14px;padding:15px;display:flex}.choice.selected{border:2px solid var(--green);background:var(--tint)}.choice.correct{border:2px solid var(--green);opacity:1}.choice:disabled{opacity:1}.number{border:1px solid var(--line);border-radius:50%;justify-content:center;align-items:center;min-width:28px;height:28px;font-size:.8rem;display:inline-flex}.confidence{flex-wrap:wrap;gap:8px;display:flex}fieldset{border:1px solid var(--line);border-radius:12px;padding:18px}legend{font-size:.9rem;font-weight:700}fieldset p{margin:12px 0 0;font-size:.75rem}progress{width:100%;height:6px;accent-color:var(--green)}footer{text-align:center;color:var(--muted);padding-top:30px;font-size:.7rem}.empty{text-align:center;padding:50px 20px}#feedback:not(:empty){color:#923a28;background:#fff0e9;border-radius:10px;margin-bottom:16px;padding:14px}@media (max-width:760px){.shell{padding:0 18px}header{padding:18px 0}.brand-sub{display:none}.layout{flex-direction:column;gap:20px;margin-top:16px;display:flex}nav{flex-direction:row;gap:4px;padding:0 0 8px;overflow-x:auto}nav button{white-space:nowrap;padding:8px 12px;font-size:.8rem}.nav-footer{display:none}.hero{padding:26px 22px}.hero h1{font-size:1.8rem}.hero-bottom strong{font-size:2.4rem}.hero-bottom span{display:block}.metrics{gap:8px}.metrics article{padding:14px 10px}.metrics strong{font-size:1.4rem}.study-grid{gap:10px}.study{padding:18px 14px}.paper{padding:22px 18px}.heading h1{font-size:1.6rem}.offline{text-align:right;max-width:105px}.confidence button{flex:1;padding:8px;font-size:.8rem}}@media (prefers-color-scheme:dark){:root{color:#e0e9e0;--paper:#202e27;--line:#415047;--muted:#b1c1b5;--green:#a9d0b4;--tint:#2d4034;background:#17231e}.hero{border-color:var(--line);background:#273c2d}.primary,.brand-mark{color:#183321;background:#a9d0b4}.draft{color:#eadcaa;background:#423c27;border-color:#675f3b}.primary:hover{color:#183321;background:#bfdac6}#feedback:not(:empty){color:#ffd6bd;background:#4d2f26}}.heading,.heading .actions{flex-wrap:wrap}.card-sort{cursor:pointer;align-items:center;gap:10px;min-height:44px;display:flex}.card-sort input{width:20px;height:20px;accent-color:var(--green)}