:root{--green:#075c47;--green-dark:#064c3b;--ink:#18352d;--sub:#536b60;--paper:#fffdf6;--mint:#e4f2e6;--line:#d9e4d9;--gold:#f3c76e;--scale:1;--body-size:1.125rem;color-scheme:light;font-family:'Malgun Gothic','맑은 고딕',system-ui,sans-serif;color:var(--ink);background:#eef3e9;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--green);text-underline-offset:3px}button:disabled{cursor:default;opacity:.65}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #b77920;outline-offset:4px}button{touch-action:manipulation}h1,h2,h3,p{margin:0}h1{font-size:calc(2.05rem * var(--scale));line-height:1.42;letter-spacing:-.055em;word-break:keep-all}h2{font-size:calc(1.35rem * var(--scale));line-height:1.55;letter-spacing:-.035em;word-break:keep-all}h3{font-size:calc(1.15rem * var(--scale));line-height:1.6}p{line-height:1.8;word-break:keep-all}small,.small{font-size:calc(.81rem * var(--scale));line-height:1.7;color:var(--sub)}[hidden]{display:none!important}.skip-link{position:absolute;left:10px;top:-90px;z-index:30;padding:15px;background:white}.skip-link:focus{top:10px}.page-shell{max-width:1140px;margin:48px auto;display:grid;grid-template-columns:1fr 600px;gap:56px;padding:0 24px;align-items:start}.brand-panel{padding-top:44px;position:sticky;top:55px}.brand-home{display:block;color:var(--green);text-decoration:none;font-size:47px;line-height:1.3;font-weight:800;letter-spacing:-3px;position:relative}.brand-mark{position:absolute;right:10px;top:8px;font-size:95px;color:#d6e7d6;transform:rotate(13deg);z-index:-1}.brand-description{font-size:24px;line-height:1.85;letter-spacing:-1px;margin-top:37px;color:#446451}.brand-bottom{margin-top:94px;display:flex;flex-direction:column;gap:11px;font-size:13px;color:#718574}.app-shell{background:var(--paper);border:1px solid var(--line);border-radius:26px;overflow:hidden;box-shadow:0 12px 55px #254c2d09}.app-header{display:flex;justify-content:space-between;align-items:center;padding:17px 25px;gap:10px;border-bottom:1px solid var(--line)}.brand-small{font-size:16px;font-weight:700;text-decoration:none;letter-spacing:-.7px}.app-header nav{display:flex;gap:3px;flex-wrap:wrap}.app-header button{border:0;background:transparent;color:var(--sub);padding:10px 9px;min-height:44px;font-size:14px}.app-header button:hover{background:var(--mint);border-radius:9px}main{padding:32px;display:flex;flex-direction:column;gap:23px;min-height:680px;font-size:calc(var(--body-size) * var(--scale));scroll-margin-top:16px;outline:none}main:focus{outline:none}.kicker{font-size:calc(.79rem * var(--scale));letter-spacing:.12em;color:var(--green);font-weight:700}.muted{color:var(--sub);font-size:calc(1rem * var(--scale));line-height:1.85}.pill{padding:6px 11px;background:var(--mint);color:var(--green);font-size:calc(.8rem * var(--scale));border-radius:8px;align-self:flex-start;display:inline-block;font-weight:700}.row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px}.message{border-radius:23px 23px 23px 4px;background:var(--mint);padding:25px}.message p{font-size:calc(2.05rem * var(--scale));line-height:1.65;font-weight:700;letter-spacing:-.06em;margin-top:12px}.primary,.secondary,.danger{display:flex;justify-content:center;align-items:center;gap:8px;min-height:58px;width:100%;border:0;border-radius:14px;padding:15px 18px;line-height:1.5;font-size:calc(1.15rem * var(--scale));font-weight:700;text-decoration:none;word-break:keep-all;text-align:center}.primary{color:#fff;background:var(--green)}.primary:hover:not(:disabled){background:var(--green-dark)}.primary:disabled{background:#cbd9cc;color:#465b4b;opacity:1}.secondary{border:1px solid #abc7b0;background:transparent;color:var(--green);font-weight:500;font-size:calc(1rem * var(--scale))}.danger{background:#fff0e3;border:1px solid #d1ae87;color:#794b28;font-size:calc(1rem * var(--scale))}.answer-list{display:flex;flex-direction:column;gap:12px}.answer{display:flex;align-items:center;gap:14px;text-align:left;min-height:70px;padding:16px 18px;width:100%;background:#fff;color:var(--ink);border:2px solid #cfdfd1;border-radius:15px;font-size:calc(1.2rem * var(--scale));font-weight:700;line-height:1.65;word-break:keep-all}.answer:hover:not(:disabled){background:#f1f6ed;border-color:#83b392}.answer .letter{flex-shrink:0;display:grid;place-items:center;border-radius:7px;background:#edf3e8;color:var(--green);font-size:calc(.8rem * var(--scale));width:29px;height:30px}.answer.selected{border-color:var(--green);background:var(--mint);opacity:1}.answer.correct{border-color:var(--green);background:var(--mint);opacity:1}.answer.incorrect{border-color:#ad784a;background:#fff0df;opacity:1}.answer:disabled{opacity:.75}.push{margin-top:auto}.stack{display:flex;flex-direction:column;gap:14px}.evidence{display:flex;flex-direction:column;gap:17px;padding:25px 23px;border-radius:18px;background:#fff0c9;box-shadow:0 5px 0 #cda64711;word-break:keep-all}.evidence .sentence{font-size:calc(1.55rem * var(--scale));line-height:1.95;letter-spacing:-.035em;white-space:pre-line}.stamp{border:1px solid #b89956;color:#765d27;padding:3px 8px;font-size:calc(.7rem * var(--scale));border-radius:5px;align-self:flex-start;letter-spacing:.12em}.explain{padding:18px;border-radius:14px;background:#edf4e9;color:#2d563e;font-size:calc(1rem * var(--scale));line-height:1.85;word-break:keep-all}.explain.error{background:#fff0dd;color:#76532b}.bridge{border-left:3px solid var(--gold);padding:0 0 0 16px;font-size:calc(1.15rem * var(--scale));line-height:1.85;word-break:keep-all}.reveal{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px;border:1px solid var(--line);border-radius:18px;padding:23px 16px;background:white;font-size:calc(1.9rem * var(--scale));font-weight:700}.reveal del{color:#8a6f51;font-size:calc(1.55rem * var(--scale));font-weight:400}.reveal strong{color:var(--green)}.center{text-align:center}.footnote{font-size:calc(.8rem * var(--scale));line-height:1.75;color:var(--sub)}.hero{border-radius:20px;padding:26px;background:var(--mint);display:flex;flex-direction:column;gap:15px}.symbol{font-size:40px;line-height:1.2}.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.stat{padding:18px 12px;text-align:center;border:1px solid var(--line);border-radius:16px;background:#fff;overflow-wrap:anywhere}.stat strong{display:block;font-size:calc(1.7rem * var(--scale));color:var(--green);line-height:1.6}.stat span{font-size:calc(.9rem * var(--scale));color:var(--sub)}.case-teaser{padding:23px;background:#183f30;color:#fff8e9;border-radius:19px;display:flex;flex-direction:column;gap:16px}.case-teaser .small{color:#c8decf}.case-teaser p{font-size:calc(1.25rem * var(--scale));line-height:1.8}.case-teaser .primary{background:var(--gold);color:#303e25}.road{display:flex;flex-direction:column;gap:13px}.case-row{border:1px solid var(--line);border-radius:16px;padding:19px;background:#fff;display:flex;flex-direction:column;gap:12px}.case-row.active{border:2px solid var(--green);background:var(--mint)}.case-row.locked{background:#f6f6ef}.case-row .number{width:33px;height:33px;flex-shrink:0;border-radius:50%;background:#e9f0e4;color:var(--green);display:grid;place-items:center;font-size:15px;font-weight:700}.case-row.active .number{background:var(--green);color:#fff}.case-title{display:flex;align-items:center;gap:12px}.case-title>div{min-width:0}.case-row .primary{font-size:calc(1rem * var(--scale));min-height:50px}.meter{height:7px;background:#e3eadf;border-radius:9px;overflow:hidden}.meter>span{display:block;height:100%;background:var(--green)}.lesson-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:7px}.lesson-dot{min-height:49px;padding:8px 3px;border:1px solid #bcd0c0;border-radius:10px;background:#fff;font-size:calc(.9rem * var(--scale));color:var(--green)}.lesson-dot.done{background:#def0df;border-color:#77aa85}.lesson-dot:disabled{opacity:1;color:#758271;background:#eeefe7}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.memory-card{min-height:98px;padding:15px 5px;border:2px solid #afceb7;border-radius:15px;background:#fff;color:var(--ink);font-size:calc(1.5rem * var(--scale));font-weight:700;line-height:1.6;overflow-wrap:anywhere}.memory-card.covered{color:#fff;background:var(--green);border-color:var(--green);background-image:radial-gradient(#ffffff18 1px,transparent 1px);background-size:12px 12px}.memory-card.matched{background:var(--mint);color:var(--green);border-color:var(--green)}.memory-card:disabled{opacity:1}.compact .memory-card{min-height:73px;font-size:calc(1.25rem * var(--scale))}.progress-caption{font-size:calc(.85rem * var(--scale));color:var(--sub)}.question{font-size:calc(1.55rem * var(--scale));line-height:1.85;white-space:pre-line;word-break:keep-all;letter-spacing:-.035em}.source-link{font-size:calc(.8rem * var(--scale))}.feedback-head{font-size:calc(1rem * var(--scale));font-weight:700}.text-button{border:0;background:transparent;color:var(--green);padding:10px 3px;min-height:44px;text-decoration:underline;text-underline-offset:5px;font-size:calc(.9rem * var(--scale))}.app-footer{padding:17px 25px 20px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:space-between;align-items:center;flex-wrap:wrap;font-size:12px;color:var(--sub)}.app-footer button{border:0;background:transparent;color:var(--green);font-size:13px;min-height:44px;padding:7px}.app-footer .version{font-size:10px}.settings-section{border-top:1px solid var(--line);padding-top:21px;display:flex;flex-direction:column;gap:15px}.size-control{display:flex;flex-wrap:wrap;gap:8px}.size-control button{flex:1;min-height:50px;border:1px solid #b6cbb7;background:#fff;border-radius:11px;padding:9px;color:var(--green);font-size:calc(.9rem * var(--scale))}.size-control button[aria-pressed=true]{background:var(--green);color:#fff}.review-item{padding:18px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:9px}.review-item .question{font-size:calc(1.15rem * var(--scale))}.badges{display:flex;flex-wrap:wrap;gap:10px}.badge{border-radius:11px;padding:12px 15px;background:#ffedbd;color:#6c4f18;font-size:calc(.95rem * var(--scale))}.notice{font-size:calc(.9rem * var(--scale));padding:16px;border-radius:12px;background:#f1f4e9;color:var(--sub);line-height:1.8}#save-alert{padding:15px 24px;background:#fff0d7;color:#784d23;font-size:16px;line-height:1.8}dialog{border:1px solid var(--line);border-radius:18px;background:var(--paper);color:var(--ink);padding:26px;max-width:min(90vw,470px)}dialog::backdrop{background:#16342580}dialog h2{font-size:23px}dialog p{font-size:17px;margin-top:15px}.dialog-actions{display:flex;gap:12px;margin-top:23px}.dialog-actions button{font-size:17px;min-width:0}body.large-text .result-grid{grid-template-columns:1fr}body.large-text .lesson-grid{grid-template-columns:repeat(3,minmax(0,1fr))}body.large-text .row{align-items:flex-start}body.large-text .size-control{flex-direction:column}body.large-text .answer{align-items:flex-start}body.large-text .brand-small{max-width:140px}.loading{padding:40px;text-align:center}.support-links{display:flex;gap:13px;flex-wrap:wrap}.offline{color:#a06b22!important}
.intro-start{min-height:0;gap:20px;padding-top:26px;padding-bottom:24px}.intro-start .answer{min-height:62px;padding-top:12px;padding-bottom:12px}.intro-start .message{padding:21px 24px}
@media(min-width:1001px){.page-shell{margin-top:28px}}
@media(max-width:1000px){.page-shell{max-width:660px;grid-template-columns:1fr;margin:22px auto;padding:0 18px}.brand-panel{display:none}.app-shell{width:100%}}
@media(max-width:540px){.page-shell{margin:0 auto;padding:0;display:block;max-width:600px}.app-shell{border:0;border-radius:0;box-shadow:none;min-height:100dvh}main{padding:27px 22px;min-height:calc(100dvh - 156px);gap:22px}.app-header{padding:13px 18px}.app-header nav button{font-size:13px;padding:10px 7px}.app-footer{padding:12px 20px}h1{font-size:calc(1.9rem * var(--scale))}.evidence .sentence{font-size:calc(1.4rem * var(--scale))}.message p{font-size:calc(1.9rem * var(--scale))}.brand-small{font-size:15px}.answer{font-size:calc(1.13rem * var(--scale))}.primary{font-size:calc(1.1rem * var(--scale))}.small{font-size:calc(.77rem * var(--scale))}}
@media(max-width:350px){main{padding:23px 17px}.app-header{padding:12px 13px}.brand-small{font-size:14px}.app-header nav button{padding:9px 5px}.answer{padding:14px 13px;gap:9px}h1{font-size:calc(1.75rem * var(--scale))}}
@media(prefers-reduced-motion:no-preference){.answer,.primary{transition:background .15s,border-color .15s}}
@media print{.brand-panel,.app-header,.app-footer{display:none}.page-shell{display:block;margin:0;padding:0}.app-shell{box-shadow:none;border:0}main{min-height:0}}