:root{font-family:system-ui,-apple-system,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;color:#252a32;background:#f6f7f9;font-size:16px;--accent:#b94b10;--line:#dde1e7;--muted:#626b78}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}a{color:inherit;text-underline-offset:4px}button{cursor:pointer}button,a.primary,a.secondary{min-height:46px;border:1px solid #cad0da;border-radius:10px;background:white;padding:10px 15px;display:inline-flex;align-items:center;justify-content:center;color:#252a32;text-decoration:none;font-weight:700;line-height:1.5}button.primary,a.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.quiet{border:0;background:transparent;font-size:14px;padding:8px}button:disabled{opacity:.55;cursor:not-allowed}input:not([type=checkbox]),select,textarea{width:100%;min-height:48px;background:#fff;color:#252a32;border:1px solid #b8c1cc;border-radius:10px;padding:11px 13px;font-size:16px}textarea{resize:vertical;line-height:1.65}label{display:grid;gap:8px;font-size:15px;font-weight:650}label small,.muted{font-size:14px;color:var(--muted);font-weight:400;line-height:1.65}p{line-height:1.7;overflow-wrap:anywhere}h1{font-size:clamp(26px,3.3vw,38px);letter-spacing:-.045em;margin:4px 0 10px}h2{font-size:23px;margin:0 0 12px;line-height:1.5}h3{font-size:19px;margin:0 0 12px}small{font-size:14px;line-height:1.5}.eyebrow{font-size:12px;letter-spacing:.12em;font-weight:800;color:var(--accent);margin:0 0 8px}.studio-top{max-width:1280px;margin:auto;padding:18px 28px;display:flex;align-items:center;justify-content:space-between;gap:18px}.studio-top a{min-height:44px;display:flex;align-items:center;text-decoration:none;font-size:14px}.studio-brand{font-size:22px!important;font-weight:850;gap:8px}.studio-brand span{font-size:14px;font-weight:650}.skip{position:absolute;left:-1000px;top:0}.skip:focus{left:20px;background:white;padding:15px;z-index:10}main{max-width:1280px;margin:auto;padding:24px 28px 64px}.studio-heading{display:flex;justify-content:space-between;gap:24px;align-items:center}.studio-heading p:not(.eyebrow){margin:0;color:var(--muted)}.studio-status{margin:20px 0;min-height:26px;font-size:15px;color:#565f6e;line-height:1.6}.studio-status[data-error=true],.inline-error{color:#a42b21}.studio-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0}.studio-stats button{justify-content:space-between;background:#fff;border-color:var(--line);padding:15px 18px}.studio-stats strong{font-size:24px}.studio-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:24px;align-items:start}.studio-layout>*{min-width:0}.studio-library{position:sticky;top:16px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.studio-library header{display:flex;justify-content:space-between;align-items:center}.studio-library header h2{font-size:19px;margin:0}.search-label,.filter-label{margin:16px 0}.filter-label{grid-template-columns:auto 1fr;align-items:center}.filter-label select{min-height:44px;font-size:14px}#studioList{max-height:52vh;overflow:auto;overscroll-behavior:contain;padding:2px}.course-group{padding:10px 0;border-bottom:1px solid var(--line)}.course-group summary{cursor:pointer;padding:9px 0;font-weight:750;overflow-wrap:anywhere}.course-group summary small{display:block;color:var(--muted);font-weight:400;margin:5px 0}.lesson-row{width:100%;display:grid;text-align:left;justify-content:stretch;gap:5px;margin:8px 0;padding:12px;border-color:var(--line)}.lesson-row[aria-current=true]{border:2px solid var(--accent);background:#fff4eb;padding:11px}.lesson-row strong{font-size:15px;overflow-wrap:anywhere}.lesson-row small{font-size:13px;color:var(--muted)}.tag{display:inline-flex;width:fit-content;padding:3px 7px;border-radius:5px;font-size:12px;background:#edf0f5;color:#556071;font-weight:650}.tag.changes{background:#fff1d8;color:#875810}.tag.submitted{background:#eaf0ff;color:#36518c}.tag.approved{background:#e5f2e9;color:#24673c}.group-actions{display:flex;gap:5px;flex-wrap:wrap}.group-actions button{min-height:42px;font-size:14px}.storage{border-top:1px solid var(--line);padding-top:14px;margin-top:18px;font-size:14px}.storage summary{cursor:pointer;min-height:40px}.storage p{font-size:13px;color:var(--muted)}progress{width:100%;height:9px;accent-color:var(--accent)}.library-links{display:grid;gap:12px;margin-top:14px;font-size:14px}.library-links a{min-height:32px;display:flex;align-items:center}.studio-workspace{min-width:0}.panel>label,.panel>.optional{margin-top:20px}.panel,.welcome,.editor-head,.editor-section,.readonly,.account-box{background:#fff;border:1px solid var(--line);padding:26px;border-radius:18px;margin-bottom:18px}.welcome{padding:38px;min-height:420px}.welcome-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:14px;background:#252a32;color:#fff;font-size:23px;font-weight:750;margin-bottom:24px}.welcome ol{padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;list-style:none;margin:30px 0}.welcome li{border-top:2px solid #e9c7b2;padding-top:15px;font-size:15px}.welcome li span{display:block;font-size:14px;color:var(--muted);margin-top:6px}.editor-head{display:flex;justify-content:space-between;align-items:start;gap:16px}.editor-head h2{margin:6px 0;font-size:24px;overflow-wrap:anywhere}.editor-head small{color:var(--muted)}.editor-head .actions{margin:0}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.editor-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:16px 0}.editor-tabs 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#c8a28c;border-radius:15px;background:#fff8f2}.upload-zone.drag{border-color:var(--accent);background:#ffeddc}.upload-zone input{max-width:100%;border:0;padding:0}.upload-zone input::file-selector-button{border:0;border-radius:9px;padding:12px 18px;background:var(--accent);color:#fff;font:inherit;font-weight:700;cursor:pointer}.upload-zone p{font-size:14px;color:var(--muted);margin:0}.upload-zone b{font-size:18px}.upload-status{padding:14px;border:1px solid var(--line);border-radius:10px;margin:12px 0;overflow-wrap:anywhere}.upload-status>div{display:flex;justify-content:space-between;gap:10px;align-items:center}.upload-status small{display:block;margin:6px 0}.upload-status.error{border-color:#c97965;background:#fff6f2}.file-card{padding:18px 0;border-bottom:1px solid var(--line)}.file-card:last-child{border:0}.file-head{display:flex;align-items:start;justify-content:space-between;gap:12px}.file-head strong{display:block;overflow-wrap:anywhere}.file-head small{color:var(--muted);display:block;margin:5px 0}.file-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.file-actions button,.file-actions a{font-size:14px;min-height:42px}.file-card video{width:100%;max-height:340px;border-radius:10px;background:#18202c;margin-top:12px}.notice{padding:15px 18px;background:#fff3e7;border-left:3px solid var(--accent);border-radius:9px;font-size:15px;line-height:1.7;white-space:pre-wrap}.checklist{padding:0;list-style:none;margin:20px 0}.checklist li{display:flex;align-items:center;gap:10px;margin:8px 0}.checklist button{width:100%;justify-content:flex-start;text-align:left;border-color:var(--line);font-size:15px}.checklist .done{color:#24673c;border-color:#bed7c6;background:#f1f8f3}.checklist .marker{width:24px;font-weight:800;flex-shrink:0}.checklist small{margin-left:auto;font-size:13px}.check{display:flex;align-items:flex-start;gap:12px;font-weight:400;font-size:15px;line-height:1.7;margin:18px 0}.check input{width:21px;height:21px;flex:0 0 21px;margin:3px 0;accent-color:var(--accent)}.pricing-card{padding:18px;border:1px solid var(--line);border-radius:12px;margin:20px 0}.pricing-card summary{font-weight:750;cursor:pointer;min-height:44px}.pricing-card form{display:grid;gap:18px;margin-top:18px}.terms{font-size:14px;color:#566171;line-height:1.7}.terms summary{font-size:14px}.terms[open]{max-height:300px;overflow:auto;padding:10px;border:1px solid var(--line);border-radius:9px}.studio-footer{position:sticky;bottom:12px;z-index:4;display:flex;gap:12px;align-items:center;justify-content:space-between;border:1px solid #d7dce3;background:#fffffff5;backdrop-filter:blur(12px);border-radius:14px;padding:14px 18px;box-shadow:0 5px 20px #1e2c4310}.studio-footer small{flex:1;font-size:14px;color:var(--muted)}.studio-footer .actions{margin:0;flex-shrink:0}.inline-error{line-height:1.6;font-size:15px;white-space:pre-wrap}.mobile-back{display:none}.readonly 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@media(max-width:860px){.studio-layout{grid-template-columns:240px minmax(0,1fr);gap:16px}main{padding:20px}.studio-top{padding:14px 20px}.panel,.editor-head,.editor-section,.readonly{padding:20px}.field-grid{grid-template-columns:1fr}.studio-footer{flex-wrap:wrap}.studio-footer small{flex-basis:100%}.studio-footer .actions{width:100%}.studio-footer .actions button{flex:1}.editor-head{display:block}.editor-head .actions{margin-top:14px}.welcome{padding:24px}}
@media(max-width:680px){main{padding:16px 14px 36px}.studio-top{padding:8px 14px;gap:8px}.studio-brand span{display:none}.studio-top a{font-size:13px}.studio-heading{display:block}.studio-heading>button{width:100%;margin-top:18px}.studio-heading h1{font-size:27px}.studio-stats{gap:7px;grid-template-columns:repeat(2,1fr)}.studio-stats button{padding:12px 14px;font-size:14px}.studio-layout{display:block}.studio-library{position:static;margin-bottom:18px}#studioList{max-height:60vh}.studio-workspace>.welcome{display:none}body:not([data-editing=true]) .studio-workspace{display:none}body[data-editing=true] .studio-library,body[data-editing=true] .studio-heading,body[data-editing=true] .studio-stats{display:none}.mobile-back{display:inline-flex;margin-bottom:14px}.editor-tabs{position:sticky;top:0;z-index:3;background:#f6f7f9;padding:8px 0;margin-top:0;gap:6px}.editor-tabs button{font-size:14px;padding:10px;justify-items:center;text-align:center}.editor-tabs button small{font-size:12px}.studio-footer{bottom:calc(8px + env(safe-area-inset-bottom));padding:10px 12px}.studio-footer .actions{gap:8px}.studio-footer .actions button{font-size:14px;padding:10px}.upload-zone{padding:22px 12px}.editor-section{padding:18px}.editor-head{padding:18px}.welcome ol{grid-template-columns:1fr}.file-head{gap:8px}.checklist small{display:none}.panel{padding:18px}.studio-status{margin:12px 0;font-size:14px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.editor-section,.panel{scroll-margin-top:94px}