:root{--paper:#f6f5ef;--card:#fffef9;--ink:#263e34;--muted:#6c746a;--line:#dcded2;--green:#2d4b3e;--soft:#e9eddf;--red:#aa523c;--serif:Georgia,'Times New Roman',serif;--sans:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--ko:'Apple SD Gothic Neo','Malgun Gothic','Noto Sans KR',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.6}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}a{color:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--red);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2{font-weight:400}h1{font-family:var(--serif);font-size:clamp(38px,5.2vw,65px);line-height:1.1;letter-spacing:-2px}h2{font-family:var(--serif);font-size:30px;line-height:1.2;letter-spacing:-.7px}h3{font-size:16px}small{font-size:12px}.shell{width:min(1080px,calc(100% - 72px));margin-inline:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:108px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-family:var(--serif);font-size:21px;line-height:1.15}.brand small{display:block;font-family:var(--sans);font-size:9px;letter-spacing:2px;margin-top:7px}.brand-mark{background:var(--green);color:var(--paper);border-radius:12px;display:grid;place-items:center;width:44px;height:48px;font-family:var(--ko);font-size:32px}.site-header nav{display:flex;gap:32px;align-self:stretch;align-items:stretch}.site-header nav a{display:flex;align-items:center;text-decoration:none;color:var(--muted);position:relative;font-size:13px}.site-header nav a[aria-current=page]{color:var(--ink);font-weight:600}.site-header nav a[aria-current=page]:after{content:'';height:2px;position:absolute;bottom:0;width:100%;background:var(--green)}.level{font-size:10px;letter-spacing:1px;border:1px solid var(--line);border-radius:5px;padding:7px 10px}.level b{margin-left:7px;font-size:12px;letter-spacing:0}.eyebrow{display:block;font-size:10px;letter-spacing:2px;font-weight:600;color:var(--muted);margin-bottom:18px}.hero{padding:62px 0 47px;display:grid;grid-template-columns:1.5fr 1fr;align-items:center;gap:40px}.hero .eyebrow{color:var(--red)}.hero h1{margin-bottom:23px}.hero h1 em{font-weight:400;color:var(--red)}.hero p{color:var(--muted);max-width:420px;margin:0;font-size:14px;line-height:1.9}.seal{width:247px;height:247px;border:1px solid #bac3ac;border-radius:50%;justify-self:center;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;transform:rotate(-7deg);background:radial-gradient(ellipse at center,#eceddf77,transparent 70%)}.seal:before{content:'';position:absolute;inset:11px;border:1px solid #d5daca;border-radius:50%}.seal-ko{font-family:var(--ko);font-size:43px;font-weight:500;line-height:1.3;letter-spacing:5px;z-index:1}.seal small{font-size:9px;letter-spacing:2px;margin-top:15px}.seal-star{position:absolute;right:4px;top:15px;background:var(--paper);color:var(--red);font-size:40px;padding:0 10px;line-height:1}.stats{display:grid;grid-template-columns:repeat(3,1fr);border-block:1px solid var(--line);margin-bottom:40px;padding:21px 0}.stat{display:flex;align-items:center;justify-content:center;gap:14px;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat strong{font-family:var(--serif);font-weight:400;font-size:34px;line-height:1}.stat span{font-size:12px;color:var(--muted);line-height:1.5}.stat span b{display:block;font-weight:500;color:var(--ink)}.session-card{display:grid;grid-template-columns:1fr 1.1fr;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden}.session-intro{padding:34px 36px}.session-intro h2{font-size:31px;margin-bottom:13px}.session-intro p{font-size:13px;color:var(--muted);max-width:310px}.session-intro .eyebrow{margin-bottom:13px}.tiny-dots{display:flex;gap:7px;margin-top:28px}.tiny-dots span{width:7px;height:7px;border-radius:50%;background:#b6c2a5}.tiny-dots span:nth-child(2){background:#d3b8a0}.tiny-dots span:nth-child(3){background:#778e7b}.session-controls{padding:31px 36px;border-left:1px solid var(--line)}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}label,.field-label{display:block;font-size:12px;font-weight:500;margin-bottom:7px}select,input[type=search]{width:100%;background:var(--card);border:1px solid var(--line);border-radius:6px;padding:10px;color:var(--ink);min-height:44px}fieldset{border:0;padding:0;margin:18px 0}legend{font-size:12px;font-weight:500;margin-bottom:8px}.segmented{display:flex;gap:7px}.segmented label{flex:1;text-align:center;position:relative;margin:0;cursor:pointer}.segmented input{position:absolute;opacity:0}.segmented span{display:block;padding:7px;border:1px solid var(--line);border-radius:5px;font-size:12px}.segmented input:checked+span{background:var(--soft);border-color:#829879}.segmented input:focus-visible+span{outline:3px solid var(--red);outline-offset:3px}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;border:1px solid transparent;border-radius:6px;padding:11px 19px;text-decoration:none;font-size:13px;font-weight:500;line-height:1.4}.primary{background:var(--green);color:#fffef9}.primary:hover{background:#203c30}.secondary{background:transparent;border-color:var(--line);color:var(--ink)}.secondary:hover{background:var(--soft)}.full{width:100%}.arrow{font-size:20px;line-height:1;margin-left:auto}.session-note{font-size:11px!important;margin:10px 0 0;text-align:center;color:var(--muted)}.below-home{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:28px 0 45px;font-size:12px;color:var(--muted)}.text-link{color:var(--ink);text-underline-offset:4px}.site-footer{border-top:1px solid var(--line);padding-block:21px 25px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px}.site-footer>span:first-child{color:var(--ink)}.site-footer [lang=ko]{font-family:var(--ko)}.site-footer [lang=fr]{font-family:var(--sans);margin-left:8px}.page-head{padding:46px 0 27px}.page-head h1{font-size:44px;margin-bottom:14px}.page-head p{color:var(--muted);max-width:610px;font-size:14px}.filters{display:grid;grid-template-columns:2fr 1fr 1fr;gap:13px;margin:0 0 24px}.count{color:var(--muted);font-size:12px;margin-bottom:15px}.library-list{display:grid;gap:12px;margin-bottom:40px}.sheet{border:1px solid var(--line);border-radius:8px;background:var(--card);overflow:hidden}.sheet summary{padding:20px 22px;cursor:pointer;list-style:none}.sheet summary::-webkit-details-marker{display:none}.sheet summary:after{content:'+';float:right;font-size:22px;margin-top:-4px;color:var(--muted)}.sheet[open] summary:after{content:'−'}.sheet-title{display:block;font-size:16px;line-height:1.7;padding-right:20px;margin-top:10px}.sheet summary .ko{font-size:20px}.sheet-body{padding:0 22px 22px;border-top:1px solid var(--line)}.sheet-body .answer-content{padding-top:20px}.sheet-meta,.exercise-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:10px;color:var(--muted)}.pill{display:inline-block;border:1px solid var(--line);border-radius:4px;padding:2px 7px;font-size:10px;color:var(--muted)}.pill.olive{background:var(--soft);border-color:transparent;color:var(--green)}.ko{font-family:var(--ko);line-break:strict;word-break:keep-all;overflow-wrap:anywhere}.exercise-wrap{max-width:760px;margin:35px auto 50px}.session-top{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);gap:16px}.quiet{background:transparent;border:0;color:var(--muted);font-size:12px;padding:10px;text-decoration:underline;text-underline-offset:4px}.progress-track{height:3px;background:var(--line);border-radius:2px;margin:14px 0 28px;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--green);transition:width .25s}.exercise-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:34px 40px}.exercise-instruction{font-family:var(--serif);font-size:26px;margin:24px 0 20px;font-weight:400}.exercise-prompt{font-size:23px;line-height:1.6;margin-bottom:25px;white-space:pre-wrap;overflow-wrap:anywhere}.exercise-prompt.ko{font-size:30px;line-height:1.8}.gap{color:var(--red);border-bottom:2px solid #c8b297;padding:0 5px;white-space:nowrap}.sources{display:grid;gap:8px;margin:0 0 24px}.source{display:flex;gap:14px;align-items:baseline;background:var(--paper);padding:12px 15px;border-radius:5px}.source span:first-child{font-size:10px;color:var(--red)}.source .ko{font-size:19px}textarea{width:100%;min-height:105px;padding:15px;background:var(--paper);border:1px solid #c9cebf;border-radius:6px;resize:vertical;font-family:var(--ko);font-size:23px;line-height:1.7;color:var(--ink)}textarea::placeholder{font-family:var(--sans);font-size:14px;color:#7c8379}textarea[readonly]{background:#f0f0e8;color:#566357}.answer-help{font-size:11px;color:var(--muted);margin:6px 0 18px}.answer-actions{display:flex;justify-content:space-between;align-items:center;gap:12px}.answer-actions .quiet{padding-left:0}.feedback{border-top:1px solid var(--line);margin-top:27px;padding-top:23px}.feedback-status{font-size:13px;font-weight:600;margin-bottom:18px}.feedback-status.match{color:var(--green)}.feedback-status.compare{color:var(--red)}.answer-content .ko{font-size:22px;line-height:1.8;margin:6px 0 18px}.answer-content .caption{color:var(--muted);font-size:10px;letter-spacing:1px;text-transform:uppercase;margin:0}.explanation{font-size:13px;color:#566154;border-left:2px solid #a4b194;padding-left:14px;line-height:1.85;white-space:pre-wrap}.variant-list{padding:0;list-style:none;margin:4px 0 16px}.variant-list li.ko{font-size:18px;margin-bottom:7px}.grading-note{font-size:11px;color:var(--muted);line-height:1.8}.assessment{margin-top:24px}.assessment-label{font-size:12px;margin-bottom:10px}.rating-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.rating{border:1px solid var(--line);background:var(--card);border-radius:6px;min-height:72px;padding:10px;color:var(--ink);text-align:left}.rating:hover{background:var(--soft);border-color:#90a083}.rating strong{display:block;font-weight:500;font-size:13px}.rating small{display:block;font-size:10px;color:var(--muted);margin-top:4px}.rating:first-child strong{color:var(--red)}.keyboard-note{text-align:center;font-size:10px;color:var(--muted);margin-top:18px}.summary-card{text-align:center;padding:45px 30px;border:1px solid var(--line);background:var(--card);border-radius:12px;margin:45px auto;max-width:700px}.summary-symbol{color:var(--red);font-size:48px;margin-bottom:12px}.summary-card h1{font-size:43px}.summary-card p{color:var(--muted);font-size:14px}.summary-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:30px 0}.summary-stats strong{display:block;font-family:var(--serif);font-size:30px;font-weight:400}.summary-stats span{font-size:11px;color:var(--muted)}.summary-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.data-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:28px}.data-card{padding:28px;border:1px solid var(--line);border-radius:10px;background:var(--card)}.data-card h2{font-size:27px}.data-card p{font-size:13px;color:var(--muted)}.data-actions{display:flex;flex-wrap:wrap;gap:10px}.data-actions .button{font-size:12px}.info-block{padding:23px 0 35px;max-width:680px}.info-block h2{font-size:24px}.info-block p,.info-block li{font-size:13px;color:var(--muted)}.info-block ul{padding-left:20px}.notice{border:1px solid #d4bda8;border-radius:6px;padding:13px 17px;margin-top:20px;color:#71422e;background:#f3e9db;font-size:13px;white-space:pre-wrap}.empty{padding:32px;text-align:center;border:1px dashed var(--line);border-radius:8px;color:var(--muted)}dialog{border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);width:min(500px,calc(100% - 32px));padding:30px}dialog::backdrop{background:#17271e66}dialog p,dialog li{font-size:13px;color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:25px}.skip-link{position:fixed;top:-100px;left:15px;z-index:10;background:var(--green);color:white;padding:10px}.skip-link:focus{top:10px}[hidden]{display:none!important}#main:focus{outline:none}
@media(min-width:1400px){.hero{padding-top:76px;padding-bottom:58px}.session-card{margin-bottom:8px}}
@media(max-width:700px){.shell{width:calc(100% - 36px)}.site-header{min-height:122px;flex-wrap:wrap;gap:0;padding-top:20px}.brand{font-size:19px}.brand-mark{width:38px;height:42px;font-size:28px}.level{margin-left:auto}.site-header nav{order:3;width:100%;height:47px;justify-content:center;gap:40px;margin-top:12px}.site-header nav a{font-size:12px}.hero{padding:37px 0 30px;grid-template-columns:1fr;gap:0;position:relative}.hero h1{font-size:43px;letter-spacing:-1.8px;max-width:330px;position:relative;z-index:1}.hero p{font-size:13px;max-width:300px}.hero .eyebrow{font-size:9px;margin-bottom:18px}.seal{display:none}.stats{padding:19px 0;margin-bottom:25px}.stat{flex-direction:column;gap:7px;text-align:center}.stat strong{font-size:31px}.stat span{font-size:10px}.session-card{grid-template-columns:1fr}.session-intro{padding:25px 24px 13px}.session-intro h2{font-size:29px}.session-intro p{max-width:none;margin-bottom:10px}.tiny-dots{display:none}.session-controls{padding:10px 24px 25px;border-left:0}.below-home{padding:23px 0 30px;align-items:flex-start;gap:25px;font-size:11px}.below-home>span{max-width:210px}.below-home a{white-space:nowrap}.site-footer{font-size:10px;padding-block:19px;flex-direction:column;gap:7px}.site-footer>span:last-child{display:none}.page-head{padding-top:32px}.page-head h1{font-size:37px}.filters{grid-template-columns:1fr 1fr}.filters>div:first-child{grid-column:1/-1}.sheet summary{padding:17px}.sheet-title{font-size:14px}.sheet summary .ko{font-size:18px}.sheet-body{padding-inline:17px}.exercise-wrap{margin-top:23px}.exercise-card{padding:25px 21px}.exercise-instruction{font-size:24px;margin-top:19px}.exercise-prompt{font-size:20px}.exercise-prompt.ko{font-size:25px}.source .ko{font-size:17px}textarea{font-size:21px;min-height:119px}.answer-help{font-size:10px}.answer-actions{align-items:stretch;flex-direction:column-reverse}.answer-actions .quiet{align-self:center;font-size:11px}.answer-actions .primary{width:100%}.rating-grid{gap:7px}.rating{padding:10px 8px;min-height:76px}.rating strong{font-size:12px}.rating small{font-size:9px}.keyboard-note{display:none}.answer-content .ko{font-size:20px}.data-grid{grid-template-columns:1fr;gap:14px}.data-card{padding:24px}.summary-card{padding:30px 18px;margin:30px 0}.summary-card h1{font-size:35px}.summary-stats{gap:9px}.summary-actions{flex-direction:column}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}