:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:#171715;font-synthesis:none;--ink:#171715;--muted:#666663;--quiet:#93938e;--paper:#fff;--ground:#f4f4f2;--line:#c9c9c4;--soft-line:#dfdfdb;--red:#d0180d;--red-soft:#fff2ef;--green:#176c45;--amber:#a05a00;--display:"Bodoni 72", Didot, "Iowan Old Style", Baskerville, serif;--ui:"Avenir Next Condensed", "Avenir Next", "Gill Sans", sans-serif;background:#f4f4f2;font-family:Avenir Next Condensed,Avenir Next,Gill Sans,sans-serif}*{box-sizing:border-box}html{background:var(--ground);min-width:320px}body{background:var(--ground);min-width:320px;min-height:100vh;margin:0}button{font:inherit;color:inherit}button:focus-visible{outline-offset:3px;outline:3px solid #d0180d3d}.app-shell{min-height:100vh}.topbar{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffff5;grid-template-columns:minmax(250px,1fr) auto minmax(100px,1fr);align-items:center;gap:28px;min-height:88px;padding:0 32px;display:grid;position:sticky;top:0}.brand{cursor:pointer;text-align:left;background:0 0;border:0;align-items:baseline;gap:22px;width:fit-content;padding:0;display:flex}.brand span{font:500 clamp(25px, 2.3vw, 39px)/1 var(--display);letter-spacing:.02em;text-transform:uppercase}.brand small{color:var(--muted);letter-spacing:.015em;white-space:nowrap;font-size:13px}.mode-nav{align-items:center;gap:2px;display:flex}.mode-nav button{min-height:42px;color:var(--muted);letter-spacing:.04em;cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;align-items:center;gap:7px;padding:0 15px;font-size:13px;font-weight:650;display:inline-flex}.mode-nav button:hover{color:var(--ink)}.mode-nav button.active{color:var(--red);border-bottom-color:var(--red)}.reset-session{border:0;border-left:1px solid var(--soft-line);color:var(--muted);cursor:pointer;background:0 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4px var(--red);background:#fff}.rail-list button.active i{box-shadow:0 0 0 4px var(--ground)}.rail-caption{border-top:2px solid var(--red);color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin:18px 0 0;padding-top:16px;font-size:10px;font-weight:700}.study-stage{min-width:0}.set-note{border-left:3px solid var(--green);color:var(--green);background:#edf7f1;margin:0 0 12px;padding:10px 12px;font-size:12px;font-weight:650}.study-card{background:var(--paper);border:1px solid var(--line);clip-path:polygon(0 0,calc(100% - 30px) 0,100% 30px,100% 100%,18px 100%,0 calc(100% - 18px));min-height:690px;padding:clamp(30px,4vw,54px);animation:.34s ease-out both card-enter;position:relative;box-shadow:0 16px 34px #17171517}.study-card:before{border-left:1px solid var(--line);background:var(--ground);content:"";transform-origin:100% 0;width:30px;height:30px;position:absolute;top:0;right:0;transform:skew(45deg)translate(15px)}@keyframes card-enter{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.card-meta{gap:23px;margin-bottom:24px;display:grid}.card-meta span{color:var(--muted);font-size:13px}.card-meta strong{border-bottom:1px solid var(--ink);width:fit-content;color:var(--red);letter-spacing:.16em;text-transform:uppercase;padding-bottom:7px;font-size:12px;font-weight:750}.study-card h1{max-width:760px;font:500 clamp(31px, 3.1vw, 50px)/1.16 var(--display);letter-spacing:-.022em;text-wrap:balance;margin:0}.answer-controls{border-top:1px solid var(--soft-line);border-bottom:1px solid var(--soft-line);grid-template-columns:minmax(250px,1fr) minmax(180px,220px);align-items:center;gap:34px;margin-top:40px;padding:31px 0;display:grid}.answer-controls>p{max-width:490px;color:var(--muted);font:500 17px/1.45 var(--display);margin:0}.reveal-button{border:1px solid var(--ink);background:var(--paper);letter-spacing:.08em;text-transform:uppercase;cursor:pointer;min-height:54px;padding:0 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