:root{color-scheme:light;--ink:#251d2d;--muted:#746b7c;--paper:#f7f4f8;--panel:#fff;--line:#ddd5e2;--purple:#563873;--purple2:#76549b;--soft:#eee6f4;--green:#dff0df;--amber:#f5e8c5;--red:#f4d9dc;--shadow:0 12px 35px rgba(40,25,52,.1)}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Pretendard","Noto Sans KR","Malgun Gothic",sans-serif}button,input,select{font:inherit}button{cursor:pointer}.app-header{display:flex;justify-content:space-between;align-items:end;gap:24px;padding:28px 4vw 18px;background:linear-gradient(125deg,#352343,#62447b);color:#fff}.eyebrow{margin:0 0 5px;opacity:.75;font-size:13px;letter-spacing:.12em}h1{margin:0;font-size:clamp(24px,3vw,40px);font-weight:700}.progress-summary{display:flex;gap:18px;font-size:14px}.progress-summary b{font-size:22px;margin-right:4px}.tabs{display:flex;gap:4px;padding:10px 4vw;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.tab{border:0;background:transparent;padding:10px 16px;color:var(--muted);border-radius:8px}.tab.active{background:var(--purple);color:#fff}main{padding:24px 4vw 60px}.view{display:none}.view.active{display:block}.toolbar,.quiz-options,.compare-controls{display:flex;gap:12px;align-items:end;flex-wrap:wrap;margin-bottom:18px}.toolbar label,.quiz-options label,.compare-controls label{display:grid;gap:6px;color:var(--muted);font-size:13px}.toolbar input,.toolbar select,.quiz-options select,.compare-controls select{height:42px;border:1px solid var(--line);background:#fff;border-radius:8px;padding:0 12px;color:var(--ink)}.search-field{flex:1;min-width:220px}.check{display:flex!important;align-items:center;gap:7px!important;height:42px}.result-line{margin:8px 0 14px;color:var(--muted)}.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:18px}.art-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 3px 13px rgba(40,25,52,.05);transition:.18s transform,.18s box-shadow}.art-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.art-image-button{display:block;border:0;padding:0;width:100%;background:#ebe7ed;aspect-ratio:4/3}.art-image-button img{width:100%;height:100%;display:block;object-fit:contain}.art-card-body{padding:14px}.card-meta{display:flex;gap:7px;align-items:center;color:var(--muted);font-size:12px}.badge{display:inline-flex;padding:3px 7px;border-radius:999px;background:var(--soft);color:var(--purple)}.art-card h3{font-size:17px;margin:9px 0 7px}.art-card p{font-size:13px;color:var(--muted);margin:0;line-height:1.55}.card-actions{display:flex;justify-content:space-between;align-items:center;margin-top:12px}.state-dot{font-size:12px;color:var(--muted)}.primary-button,.secondary-button,.icon-button{border-radius:8px;padding:10px 15px}.primary-button{border:1px solid var(--purple);background:var(--purple);color:#fff}.secondary-button{border:1px solid var(--line);background:#fff;color:var(--ink)}.icon-button{border:1px solid var(--line);background:#fff;font-size:20px}.text-button{border:0;background:transparent;color:var(--purple);padding:5px}.gallery-grid+.secondary-button{display:block;margin:22px auto 0}.study-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow)}.empty-state{min-height:280px;display:grid;place-items:center;color:var(--muted)}.quiz-layout{display:grid;grid-template-columns:minmax(300px,1.2fr) minmax(280px,.8fr);gap:24px}.quiz-image{background:#ede9ef;border-radius:12px;height:min(62vh,620px);display:grid;place-items:center;overflow:hidden}.quiz-image img{width:100%;height:100%;object-fit:contain}.quiz-prompt h2{font-size:24px;margin:8px 0}.quiz-prompt textarea{width:100%;min-height:120px;border:1px solid var(--line);border-radius:9px;padding:12px;resize:vertical}.quiz-answer{margin-top:14px;padding:14px;background:var(--soft);border-radius:10px}.hidden{display:none!important}.rating-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:14px}.rating-row button{border:0;border-radius:8px;padding:11px 5px}.rating-again{background:var(--red)}.rating-hard{background:var(--amber)}.rating-good{background:var(--soft)}.rating-easy{background:var(--green)}.compare-controls label{flex:1}.compare-stage-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.compare-work{background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px}.compare-work img{width:100%;height:min(45vh,440px);object-fit:contain;background:#eeeaf0;border-radius:9px}.compare-work h2{font-size:20px;margin:12px 0 4px}.compare-table{width:100%;border-collapse:collapse;margin-top:20px;background:#fff}.compare-table th,.compare-table td{border-bottom:1px solid var(--line);padding:12px;text-align:left;vertical-align:top;line-height:1.55}.compare-table th{width:12%;color:var(--purple)}.review-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:18px}.review-head h2{margin:0}.review-head p{margin:5px 0 0;color:var(--muted)}.backup-actions{display:flex;gap:8px}.file-button input{display:none}dialog{width:min(1200px,94vw);max-height:92vh;border:0;border-radius:16px;padding:0;box-shadow:0 25px 90px rgba(0,0,0,.3)}dialog::backdrop{background:rgba(20,14,25,.72)}.dialog-close{position:absolute;right:12px;top:10px;z-index:2;border:0;background:rgba(255,255,255,.9);width:38px;height:38px;border-radius:50%;font-size:25px}.detail-layout{display:grid;grid-template-columns:minmax(360px,1.25fr) minmax(310px,.75fr);min-height:70vh}.detail-image-wrap{background:#28222d;display:grid;place-items:center;padding:24px}.detail-image-wrap img{width:100%;height:75vh;max-height:760px;object-fit:contain}.detail-info{padding:28px;overflow:auto;max-height:88vh}.detail-info h2{font-size:27px;margin:7px 0}.detail-info dl{display:grid;grid-template-columns:75px 1fr;gap:8px 10px}.detail-info dt{color:var(--muted)}.detail-info dd{margin:0}.feature-list{display:grid;gap:10px;margin-top:20px}.feature{padding:11px 12px;background:var(--paper);border-left:3px solid var(--purple2);line-height:1.55}.source-link{display:inline-block;margin-top:18px;color:var(--purple)}
@media(max-width:800px){.app-header{align-items:start;flex-direction:column}.progress-summary{width:100%;justify-content:space-between}.quiz-layout,.compare-stage-grid,.detail-layout{grid-template-columns:1fr}.quiz-image{height:52vh}.detail-image-wrap img{height:55vh}.detail-info{max-height:none}.rating-row{grid-template-columns:1fr 1fr}.review-head{align-items:start;flex-direction:column}.compare-controls .icon-button{order:3}.gallery-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}}
@media(max-width:480px){main{padding-inline:14px}.app-header,.tabs{padding-inline:14px}.tabs{overflow:auto}.progress-summary{gap:8px;font-size:12px}.progress-summary b{font-size:18px}.gallery-grid{grid-template-columns:1fr}.toolbar label{width:100%}.compare-controls label{flex-basis:100%}}
.dialog-navigation{position:sticky;bottom:0;z-index:3;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:12px 18px;background:rgba(255,255,255,.96);border-top:1px solid var(--line);box-shadow:0 -8px 22px rgba(40,25,52,.08)}.dialog-navigation span{text-align:center;color:var(--muted);font-size:13px}.dialog-navigation button{min-width:125px}@media(max-width:480px){.dialog-navigation{gap:7px;padding:10px}.dialog-navigation button{min-width:0;padding:9px}.dialog-navigation span{font-size:12px}}
.tag-filter-wrap{margin:4px 0 18px;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.tag-filter-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.tag-filter{display:flex;flex-wrap:wrap;gap:7px}.tag-button,.card-tag{border:1px solid var(--line);background:#fff;color:var(--purple);border-radius:999px;padding:6px 10px;font-size:12px}.tag-button[aria-pressed="true"],.card-tag[aria-pressed="true"]{background:var(--purple);border-color:var(--purple);color:#fff}.card-tag-list{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}.card-tag{padding:4px 8px;background:var(--soft)}
.notes-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}.notes-head h2{margin:0}.notes-head p{margin:5px 0 0;color:var(--muted)}.notes-toolbar{display:flex;gap:10px;margin-bottom:18px}.notes-toolbar input,.notes-toolbar select,.note-dialog input,.note-dialog select,.note-dialog textarea{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:8px;padding:10px 12px}.notes-toolbar input{flex:1}.notes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}.note-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 3px 13px rgba(40,25,52,.05)}.note-card-cover{width:100%;height:190px;object-fit:cover;background:var(--soft)}.note-card-body{padding:16px}.note-card h3{margin:8px 0}.note-card-text{color:var(--muted);line-height:1.6;white-space:pre-wrap;display:-webkit-box;-webkit-line-clamp:5;-webkit-box-orient:vertical;overflow:hidden}.note-card-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.note-card-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}.note-dialog{width:min(780px,94vw);max-height:92vh;border:0;border-radius:16px;padding:0;box-shadow:0 25px 90px rgba(0,0,0,.3)}.note-dialog::backdrop{background:rgba(20,14,25,.72)}.note-dialog form{display:grid;gap:14px;padding:24px}.note-form-head{display:flex;justify-content:space-between;align-items:center}.note-form-head h2{margin:0}.note-form-head .dialog-close{position:static}.note-dialog label{display:grid;gap:7px;color:var(--muted);font-size:13px}.note-dialog textarea{min-height:260px;resize:vertical;line-height:1.65}.image-upload small{color:var(--muted)}.note-image-preview{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}.note-preview-item{position:relative}.note-preview-item img{width:100%;height:110px;object-fit:cover;border-radius:8px}.note-preview-item button{position:absolute;right:5px;top:5px;width:28px;height:28px;border:0;border-radius:50%;background:rgba(255,255,255,.9)}.note-form-actions{display:flex;justify-content:flex-end;gap:8px}@media(max-width:600px){.notes-head{align-items:start;flex-direction:column}.notes-toolbar{flex-direction:column}.note-dialog form{padding:16px}.note-dialog textarea{min-height:220px}}