@font-face{font-family:Passon;src:url(fonts/NanumBarunGothic.ttf) format("truetype");font-weight:400;font-display:swap}@font-face{font-family:Passon;src:url(fonts/NanumBarunGothicBold.ttf) format("truetype");font-weight:600 900;font-display:swap}
:root{font-family:Passon,system-ui,sans-serif;color:#1b3436;background:#f5f6f2;line-height:1.65;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:#126d62;text-underline-offset:4px}button,input{font:inherit}button{cursor:pointer;padding:.65rem 1rem;border:1px solid #b9cbc4;border-radius:9px;background:#fff;color:#214843;font-weight:650;min-height:44px}button:hover{background:#e9f3ee}.primary{background:#126d62;color:white;border-color:#126d62}.primary:hover{background:#09584f}.quiet{border:0;background:transparent}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #da9d20;outline-offset:3px}header{max-width:1100px;margin:auto;display:flex;align-items:center;gap:1rem;min-height:90px;padding:1rem 2rem;border-bottom:1px solid #dce5df}.brand{font-size:1.6rem;letter-spacing:-1px;font-weight:850;text-decoration:none;color:#1b3436}.brand span{color:#16816d}.private{font-size:.8rem;border:1px solid #cedbd3;padding:.1rem .5rem;border-radius:20px}nav{margin-left:auto;display:flex;align-items:center;gap:1.25rem}nav a{text-decoration:none;font-weight:650}nav form{margin:0}main{max-width:920px;margin:3rem auto;padding:0 1.5rem;min-height:65vh}h1{font-size:clamp(1.6rem,4vw,2.25rem);line-height:1.3;letter-spacing:-.04em;margin:.5rem 0 1rem}h2{font-size:1.3rem}h3{margin:.3rem 0}.eyebrow{text-transform:uppercase;font-size:.8rem;letter-spacing:.07em;font-weight:750;color:#45756b;margin:0 0 .5rem}.intro{color:#526763;margin-bottom:2.5rem}.card{background:#fff;border:1px solid #dce5df;border-radius:16px;padding:1.75rem;margin:1rem 0;box-shadow:0 4px 16px #1b343604}.section-head,.question-row{display:flex;align-items:center;justify-content:space-between;gap:1.5rem}.section-head h2{margin:0}.section-head span{color:#5c7067}.question-row p{margin:.3rem 0;color:#587069}.empty{padding:3rem;text-align:center}.notice{padding:1rem;background:#fff5d9;border-left:4px solid #c99529;border-radius:6px}.back{display:inline-block;margin-bottom:1rem}.text-block{white-space:pre-line;overflow-wrap:anywhere}.math-block{overflow:auto;padding:.5rem 0;max-width:100%;font-size:1.08rem}figure{margin:1.5rem 0}figure img{display:block;max-width:100%;height:auto;margin:auto}.choices{display:grid;gap:.75rem;margin:1.5rem 0}.choice{display:flex;align-items:center;gap:.8rem;padding:.85rem 1rem;border:1px solid #d6e0d8;border-radius:10px;min-width:0}.choice:has(input:checked){border-color:#16816d;background:#edf7f2}.choice-number{display:grid;place-items:center;border:1px solid #d6e0d8;border-radius:50%;width:1.7rem;height:1.7rem;flex-shrink:0;font-size:.85rem}.choice-body{min-width:0;flex:1}.choice-body p{margin:.2rem 0}input[type=radio]{accent-color:#126d62;width:1.15rem;height:1.15rem;flex-shrink:0}fieldset{border:0;padding:0;min-width:0}legend{padding:0;color:#526763;font-size:.9rem}.actions{display:flex;flex-wrap:wrap;gap:1rem;margin:1rem 0}.result{border-top:4px solid #16816d}.login{max-width:470px;margin:4rem auto}.login label{display:block;margin:1rem 0 .3rem;font-weight:650}.login input:not([type=hidden]){width:100%;padding:.7rem;border:1px solid #b9cbc4;border-radius:8px}.login button{width:100%;margin-top:1.5rem}footer{padding:2rem;text-align:center;font-size:.85rem;color:#6d8178}.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:0;background:white;padding:.5rem;z-index:10}time{font-size:.8rem;color:#5c7067}@media(max-width:560px){header{padding:1rem;flex-wrap:wrap;gap:.7rem}nav{width:100%;margin:0;justify-content:space-between;gap:.5rem}main{margin:1.8rem auto;padding:0 1rem}.card{padding:1.2rem}.question-row{align-items:stretch;flex-direction:column;gap:.75rem}.question-row button{width:100%}.empty{padding:2rem 1rem}.choice{padding:.7rem;gap:.5rem}.login{margin:2rem auto}}

.katex-display{text-align:left;margin:.35rem 0}figcaption{text-align:right;font-size:.85rem;margin-top:.5rem}

.map-links{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.map-node{display:inline-block;padding:.5rem .8rem;background:#edf7f2;border:1px solid #c7ded1;border-radius:10px;margin:.3rem}.conditions{padding:.6rem;background:#f5f6f2;border-radius:6px}.sources{font-size:.85rem;color:#526763;overflow-wrap:anywhere}.route{padding:1rem 0;border-top:1px solid #dce5df}

textarea{display:block;width:100%;font:inherit;min-height:6rem;padding:.7rem;border:1px solid #b9cbc4;border-radius:8px;margin:.5rem 0 1rem}

.editor input:not([type=hidden]),.editor select{font:inherit;width:100%;padding:.6rem;max-width:100%;margin:.4rem 0 1rem}.editor label{display:block}nav{flex-wrap:wrap}select{font:inherit;max-width:100%}details{margin:1rem 0}

/* Native radio semantics remain for keyboards/readers; the whole box is visible. */
.choice{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr) auto;border-width:2px}
.choice-number{border-radius:6px}
.choice-selectable{cursor:pointer}
.choice-selectable:hover{border-color:#64748b;background:#f8fafc}
.choice input.choice-input{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip:rect(0,0,0,0);clip-path:inset(50%);white-space:nowrap}
.choice:has(.choice-input:checked){border-color:#1d4ed8;background:#eff6ff}
.choice:has(.choice-input:focus-visible){outline:3px solid #1d4ed8;outline-offset:3px}
.choice-status{font-size:.85rem;font-weight:750;max-width:5em;text-align:center;overflow-wrap:anywhere}
.choice-selected-label{visibility:hidden;color:#1d4ed8}
.choice:has(.choice-input:checked) .choice-selected-label{visibility:visible}
.choice-correct{border-color:#15803d;background:#f0fdf4}
.choice-correct .choice-status{color:#166534}
.choice-wrong{border-color:#b91c1c;background:#fef2f2}
.choice-wrong .choice-status{color:#991b1b}
.choice-body,.choice-body .text-block,.choice-body .math-block,
.choice-body .katex-display,.choice-body .katex-display > .katex,
.choice-body figcaption{text-align:left}
.choice-body figure img{margin-left:0;margin-right:auto}
@media(forced-colors:active){.choice:has(.choice-input:checked),.choice-correct,.choice-wrong{outline:2px solid Highlight}.choice-status{color:CanvasText}}