/* 자료실(가이드라인·교재·내자료) 화면 스타일 — index.html #kbgPlatformStyles에서 옮겼다(2026-10-18 ②-7 · 도메인 완료 기준 1).
   문제은행(.qb-*)과 섞인 선택자 목록은 자료실 선택자만 떼어 옮기고 문제은행 쪽은 제자리에 남겼다(선언은 같다).
   옮기기 전후 계산 스타일 대조: 선택자 전수 표본 요소 × 라이트·다크 × 390·768·1280. */
.lib-filterbar{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.lib-filterbar input:not([type="checkbox"]):not([type="radio"]),.lib-filterbar select{min-width:0;padding:9px 11px;border:1px solid var(--border);border-radius:8px;background:var(--surface2);color:var(--text);font:13px 'Noto Sans KR',sans-serif;color-scheme:dark}
.lib-filterbar input::placeholder{color:var(--text3);opacity:1}
.lib-filterbar input:focus,.lib-filterbar select:focus{outline:2px solid var(--accent);outline-offset:1px}
.lib-filterbar select option{background:var(--surface);color:var(--text)}
html[data-theme="light"] .lib-filterbar input:not([type="checkbox"]):not([type="radio"]),html[data-theme="light"] .lib-filterbar select{color-scheme:light}
/* 자료실 목록×상세 2열 — 형제 `.ep-body`를 그대로 쓰지 않는 이유: 자료실 상세는 이미 `.pr-group`
   카드로 테두리를 갖고 있어 `.ep-preview`로 감싸면 테두리가 이중이 된다. 그래서 **폭 규칙만** 형제와
   같은 1000px 임계로 맞춘다. 인라인 style로 두면 미디어 쿼리를 못 걸어 375에서 목록 열이 0px로
   붕괴한다(2026-08-10 독립 리뷰 R1). */
.lib-split{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;align-items:start}
.lib-split--detail{grid-template-columns:minmax(320px,1.35fr) minmax(300px,.8fr)}
.lib-split__list,.lib-split__detail{min-width:0}
.lib-split__detail{position:sticky;top:8px}
.lib-split__list>.pr-rows{display:flex;flex-direction:column;gap:0;border:1px solid var(--ui-border);border-radius:var(--ui-radius-card);background:var(--ui-surface);overflow:hidden}
.lib-split__list>.pr-rows .ep-row{border:0;border-bottom:1px solid var(--ui-border);border-radius:0}
.lib-split__list>.pr-rows .ep-row:last-child{border-bottom:0}
.lib-split__list>.pr-rows .ep-row__open{padding:10px 12px}
.lib-page{width:100%;max-width:none}
.lib-page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:4px 0 14px;border-bottom:1px solid var(--ui-border)}
.lib-heading{display:flex;align-items:flex-start;gap:11px;min-width:0}
.lib-heading__icon{display:grid;place-items:center;width:38px;height:38px;flex:0 0 38px;border:1px solid var(--ui-border);border-radius:var(--ui-radius-control);background:var(--ui-surface);color:var(--ui-primary)}
.lib-heading__icon .ui-icon{width:21px;height:21px}
.lib-heading h2{margin:1px 0 3px;font-size:20px;line-height:1.25;white-space:nowrap}
.lib-heading .ep-sub{margin:0;max-width:720px;color:var(--ui-text-secondary);line-height:1.55}
.lib-page-actions{display:flex;justify-content:flex-end;gap:7px;flex-wrap:wrap}
.lib-page-actions .ui-btn,.lib-secondary-nav .ui-btn,.lib-trash-btn{display:inline-flex;align-items:center;gap:6px}
.lib-primary-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;margin:14px 0 10px;padding:3px;border:1px solid var(--ui-border);border-radius:var(--ui-radius-card);background:var(--ui-surface-subtle)}
.lib-primary-btn{display:flex;align-items:center;justify-content:center;gap:7px;min-width:0;min-height:42px;padding:8px 12px;border:1px solid transparent;border-radius:var(--ui-radius-control);background:transparent;color:var(--ui-text-secondary);font:600 13px/1.25 'Noto Sans KR',sans-serif;cursor:pointer}
.lib-primary-btn:hover{background:var(--ui-surface-hover);color:var(--ui-text)}
.lib-primary-btn.active{border-color:var(--ui-border-strong);background:var(--ui-primary-soft);color:var(--ui-primary)}
.lib-primary-btn:focus-visible{outline:2px solid var(--ui-focus);outline-offset:2px}
.lib-primary-btn .ui-icon{width:18px;height:18px;flex:0 0 18px}
.lib-toolbar{display:grid;grid-template-columns:minmax(260px,1fr) auto auto auto;align-items:start;gap:8px;margin:0 0 12px}
.lib-filterbar--guidelines{grid-template-columns:minmax(260px,.9fr) minmax(420px,1.5fr) auto auto}
.lib-search{display:flex;align-items:center;gap:8px;min-width:0;min-height:42px;padding:0 11px;border:1px solid var(--ui-border);border-radius:var(--ui-radius-control);background:var(--ui-surface);color:var(--ui-text-tertiary)}
.lib-search:focus-within{border-color:var(--ui-primary);outline:2px solid var(--ui-focus);outline-offset:1px}
.lib-search .ui-icon{width:18px;height:18px;flex:0 0 18px}
.lib-search input{width:100%;min-width:0;padding:0!important;border:0!important;outline:0!important;background:transparent!important;color:var(--ui-text)!important}
.lib-filter-disclosure>summary{display:none}
.lib-filter-cluster,.lib-guideline-quick-filters{display:flex;align-items:flex-start;gap:6px;flex-wrap:wrap;min-width:0}
.lib-guideline-quick-filters{flex:1 1 240px}
.lib-guideline-quick-label{display:inline-flex;align-items:center;min-height:42px;color:var(--ui-text-secondary);font-size:12px;font-weight:700}
.lib-guideline-quick-filters .ui-btn{min-height:42px}
.lib-guideline-summary{padding:8px 12px;margin:0 0 10px}
.lib-filter-options{display:flex;gap:8px}
.lib-filter-options select{min-height:42px}
.lib-secondary-nav{display:flex;gap:6px;flex-wrap:wrap}
.lib-secondary-btn[aria-pressed="true"]{border-color:var(--ui-border-strong);background:var(--ui-primary-soft);color:var(--ui-primary)}
.lib-trash-btn[aria-pressed="true"]{border-color:var(--ui-danger);background:color-mix(in srgb,var(--ui-danger) 12%,var(--ui-surface));color:var(--ui-danger)}
.lib-guideline-tools{margin:0 0 12px;border:1px solid var(--ui-border);border-radius:var(--ui-radius-control);background:var(--ui-surface)}
.lib-guideline-tools>summary{display:flex;align-items:center;gap:8px;min-height:42px;padding:8px 11px;color:var(--ui-text-secondary);font-size:13px;font-weight:650;cursor:pointer}
.lib-guideline-tools>summary .ui-icon{width:18px;height:18px;color:var(--ui-primary)}
.lib-guideline-tools[open]>summary{border-bottom:1px solid var(--ui-border);color:var(--ui-text)}
.lib-guideline-tools__body{padding:12px;min-width:0}
.lib-favorite-mark{display:inline-flex;color:var(--ui-warning);vertical-align:middle}
.lib-favorite-mark .ui-icon{width:16px;height:16px;fill:currentColor}
.lib-form-heading{display:flex;align-items:center;gap:7px}
.lib-form-heading .ui-icon{width:19px;height:19px;flex:0 0 19px;color:var(--ui-primary)}
.lib-page input:not([type="checkbox"]):not([type="radio"]),.lib-page select,.lib-page textarea{min-width:0;padding:9px 11px;border:1px solid var(--border);border-radius:8px;background:var(--surface2);color:var(--text);font:13px 'Noto Sans KR',sans-serif;color-scheme:dark}
.lib-page input::placeholder,.lib-page textarea::placeholder{color:var(--text3);opacity:1}
.lib-page input:focus,.lib-page select:focus,.lib-page textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
.lib-page select option{background:var(--surface);color:var(--text)}
.lib-breakable-title{min-width:0;max-width:100%;overflow-wrap:anywhere;word-break:break-word}
html[data-theme="light"] .lib-page input:not([type="checkbox"]):not([type="radio"]),html[data-theme="light"] .lib-page select,html[data-theme="light"] .lib-page textarea{color-scheme:light}
@media(max-width:1179px){.lib-primary-nav{grid-template-columns:repeat(3,minmax(0,1fr))}.lib-split--detail{grid-template-columns:minmax(0,1fr)}.lib-split__detail{position:static}.lib-toolbar{grid-template-columns:minmax(220px,1fr) auto auto}.lib-filterbar--guidelines{grid-template-columns:minmax(220px,1fr) auto}.lib-filterbar--guidelines .lib-search,.lib-filterbar--guidelines .lib-filter-cluster{grid-column:1/-1}.lib-filterbar--guidelines .lib-secondary-nav{grid-column:1}.lib-filterbar--guidelines .lib-trash-btn{grid-column:2}.lib-trash-btn{grid-column:auto}.lib-secondary-nav{grid-column:2}}
@media(max-width:767px){.lib-page-header{display:grid;grid-template-columns:minmax(0,1fr);gap:11px;padding-top:0}.lib-heading__icon{width:36px;height:36px;flex-basis:36px}.lib-heading h2{white-space:nowrap;word-break:keep-all}.lib-page-actions{justify-content:flex-start}.lib-page-actions .ui-btn{min-height:44px}.lib-primary-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:3px}.lib-primary-btn{min-height:44px;padding:8px}.lib-toolbar{grid-template-columns:minmax(0,1fr) auto;gap:7px}.lib-search{grid-column:1/-1;min-height:44px}.lib-filter-disclosure{grid-column:1}.lib-filter-disclosure>summary{display:inline-flex;min-height:44px;align-items:center;gap:6px}.lib-filter-options{display:none;grid-template-columns:minmax(0,1fr);gap:7px;margin-top:7px}.lib-filter-disclosure[open] .lib-filter-options{display:grid}.lib-filter-options select{width:100%;min-height:44px}.lib-filterbar--guidelines .lib-filter-cluster{grid-column:1/-1}.lib-guideline-quick-filters .ui-btn,.lib-guideline-quick-label{min-height:44px}.lib-secondary-nav{grid-column:1/-1;grid-row:auto;order:4}.lib-secondary-nav .ui-btn,.lib-trash-btn{min-height:44px}.lib-trash-btn{grid-column:2;grid-row:2}.lib-filterbar--guidelines .lib-trash-btn{grid-row:auto}.lib-guideline-tools>summary{min-height:44px}.lib-guideline-tools__body{padding:10px}.lib-split--detail .lib-split__list{display:none}.lib-split__detail{width:100%}.lib-detail-close{order:-1}}
.lib-pdf-modal{position:fixed;inset:0;z-index:2350;display:flex;align-items:stretch;justify-content:center;padding:12px;background:var(--overlay-bg)}
.lib-pdf-modal[hidden]{display:none}
.lib-pdf-dialog{display:flex;flex-direction:column;width:min(1100px,100%);min-height:0;background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-2);overflow:hidden}
.lib-pdf-head,.lib-pdf-toolbar{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border)}
.lib-pdf-head{justify-content:space-between}
.lib-pdf-head h2{margin:0;font-size:17px}
.lib-pdf-head p{margin:2px 0 0;color:var(--text2);font-size:12px}
.lib-pdf-toolbar{flex-wrap:wrap}
.lib-pdf-toolbar input{width:64px;padding:5px;background:var(--surface2);color:var(--text);border:1px solid var(--border);border-radius:7px}
.lib-pdf-stage{flex:1;min-height:0;overflow:auto;text-align:center;padding:12px;background:#20242c}
.lib-pdf-stage canvas{display:inline-block;max-width:100%;height:auto;background:white;box-shadow:var(--shadow-2)}
.lib-pdf-text{max-height:28vh;overflow:auto;padding:8px 14px;border-top:1px solid var(--border)}
.lib-pdf-text pre{white-space:pre-wrap;word-break:break-word;font:12px/1.6 inherit}
body.lib-pdf-open{overflow:hidden}
@media(max-width:600px){.lib-pdf-modal{padding:0}.lib-pdf-dialog{border-radius:0;border:0}.lib-pdf-toolbar{gap:6px}.lib-pdf-toolbar .ui-btn{min-height:40px}}