/* 주보 전자책 뷰어: 스크롤 스냅이 드래그·관성·중단을 브라우저가 처리한다. */
.bk{--bk-ease:cubic-bezier(.23,1,.32,1);max-width:960px;margin:0 auto;padding:18px 16px 40px}
.bk-head{display:grid;grid-template-columns:1fr auto;align-items:center;gap:6px 12px;margin-bottom:14px}
.bk-back{grid-column:1/-1;font-size:14px;font-weight:600;color:#6b6b70;text-decoration:none}
.bk-head h1{margin:0;font-size:26px;line-height:1.1;letter-spacing:-.02em}
.bk-weeks{display:flex;align-items:center;gap:4px;min-width:0}
.bk-weeks a,.bk-weeks>span{flex:none;display:grid;place-items:center;width:36px;height:36px;border-radius:10px;font-size:22px;color:inherit;text-decoration:none;transition:transform 120ms var(--bk-ease)}
.bk-weeks>span{opacity:.3}
.bk-weeks select{min-width:0;max-width:240px;height:36px;border:1px solid #d9d9dd;border-radius:10px;padding:0 10px;font:inherit;font-size:14px;background:#fff}
.bk-reader{background:#ececef;border-radius:18px;overflow:hidden}
.bk-meta{display:flex;justify-content:space-between;gap:12px;padding:12px 16px 0;font-size:14px}
.bk-meta time{color:#6b6b70}
.bk-stage-wrap{position:relative}
.bk-stage{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;overscroll-behavior-x:contain;scrollbar-width:none;outline-offset:-3px;-webkit-overflow-scrolling:touch}
.bk-stage::-webkit-scrollbar{display:none}
.bk-page{flex:0 0 100%;scroll-snap-align:center;scroll-snap-stop:always;margin:0;padding:14px 14px 10px;display:grid;place-items:center}
.bk-page img,.bk-page canvas{display:block;max-width:100%;max-height:clamp(380px,calc((100dvh - var(--bk-o,300px)) / var(--bk-z,1)),980px);width:auto;height:auto;background:#fff;border-radius:4px;box-shadow:0 1px 2px rgba(0,0,0,.12),0 8px 28px rgba(0,0,0,.14);user-select:none;-webkit-user-drag:none}
.bk-stage:empty{min-height:50dvh;display:grid;place-items:center}
.bk-stage:empty::before{content:'주보를 불러오는 중…';color:#6b6b70;font-size:15px}
.bk-side{position:absolute;top:50%;translate:0 -50%;width:44px;height:64px;border:0;border-radius:12px;background:rgba(255,255,255,.72);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);font-size:28px;line-height:1;cursor:pointer;opacity:0;transition:opacity 160ms ease-out,transform 120ms var(--bk-ease)}
.bk-side.is-prev{left:8px}.bk-side.is-next{right:8px}
.bk-bar{display:flex;align-items:center;gap:8px;padding:10px 12px 12px;background:rgba(255,255,255,.7);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);border-top:1px solid rgba(255,255,255,.6)}
.bk-bar input[type=range]{flex:1;min-width:60px;accent-color:#2b2b2f}
.bk-count{flex:none;min-width:48px;text-align:center;font-size:14px;font-variant-numeric:tabular-nums;font-weight:600}
.bk-btn{flex:none;display:inline-grid;place-items:center;min-width:40px;height:40px;padding:0 12px;border:1px solid #d9d9dd;border-radius:10px;background:#fff;color:inherit;font:inherit;font-size:14px;font-weight:600;text-decoration:none;cursor:pointer;transition:transform 120ms var(--bk-ease)}
.bk-btn[disabled]{opacity:.4;cursor:not-allowed}
.bk-btn:active:not([disabled]),.bk-side:active,.bk-weeks a:active{transform:scale(.97)}
.bk-mode[aria-pressed=true]{background:#2b2b2f;color:#fff;border-color:#2b2b2f}
.bk-text{background:#fbfaf6;padding:18px 20px 24px;min-height:50dvh;animation:bk-in 180ms var(--bk-ease)}
.bk-text[hidden]{display:none}
.bk-search{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:16px}
.bk-search input{flex:1 1 220px;height:40px;border:1px solid #d9d9dd;border-radius:10px;padding:0 12px;font:inherit;font-size:16px;background:#fff}
.bk-hits{display:flex;flex-wrap:wrap;gap:6px;font-size:13px;color:#6b6b70}
.bk-hits button{border:1px solid #d9d9dd;border-radius:999px;background:#fff;padding:4px 10px;font:inherit;font-size:13px;cursor:pointer}
.bk-note{max-width:34em;margin:0 auto 14px;font-size:13px;color:#6b6b70}
.bk-body{max-width:34em;margin:0 auto;font-size:18px;line-height:1.85;letter-spacing:-.005em;word-break:keep-all}
.bk-body p{margin:0 0 1.1em}
.bk-body mark{background:#ffe58a;border-radius:3px;padding:0 1px}
.bk-none,.bk-empty p{color:#6b6b70}
.bk-empty{display:grid;justify-items:center;gap:8px;padding:56px 16px;text-align:center;background:#f4f4f6;border-radius:18px}
.bk-pdf{display:grid;gap:12px;justify-items:start}
.bk-pdf iframe{width:100%;height:calc((100dvh - var(--bk-o,300px) + 60px) / var(--bk-z,1));min-height:420px;border:1px solid #d9d9dd;border-radius:12px}
@media(min-width:1100px){.bk{--bk-o:480px}}
/* large-text mode zooms the body; viewport units are not zoomed with it */
@media(min-width:1100px) and (max-width:1499px){body.moc-large .bk{--bk-z:1.12}}
@media(min-width:1500px){body.moc-large .bk{--bk-z:1.2}}
/* 전체화면: Fullscreen API가 없는 브라우저(iOS)에서도 같은 모양이 되도록 fixed 오버레이로 만든다. 높이는 % 체인으로 잡아 body zoom과 무관하다. */
.bk-fs-close,.bk-fs-count{display:none}
.bk-reader.is-full{position:fixed;inset:0;z-index:2000;border-radius:0;background:#141416;animation:bk-in 160ms var(--bk-ease)}
.is-full .bk-meta,.is-full .bk-bar{display:none}
.is-full .bk-stage-wrap,.is-full .bk-stage{height:100%}
.is-full .bk-page{height:100%;padding:12px;grid-template:minmax(0,1fr)/minmax(0,1fr)}
.is-full .bk-page img,.is-full .bk-page canvas{width:100%;height:100%;max-width:none;max-height:none;object-fit:contain;background:none;box-shadow:none}
.is-full .bk-side{opacity:1;background:rgba(20,20,22,.62);color:#fff;width:48px;height:72px}
.is-full .bk-fs-close{display:grid;place-items:center;position:absolute;top:12px;right:12px;z-index:3;width:44px;height:44px;border:0;border-radius:50%;background:rgba(20,20,22,.62);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);color:#fff;font-size:18px;cursor:pointer;transition:transform 120ms var(--bk-ease)}
.is-full .bk-fs-close:active{transform:scale(.97)}
.is-full .bk-fs-count{display:block;position:absolute;left:50%;bottom:14px;translate:-50% 0;z-index:3;padding:5px 12px;border-radius:999px;background:rgba(20,20,22,.62);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);color:#fff;font-size:13px;font-variant-numeric:tabular-nums}
@keyframes bk-in{from{opacity:0}}
@media (hover:hover) and (pointer:fine){.bk-stage-wrap:hover .bk-side{opacity:1}.bk-weeks a:hover,.bk-btn:hover:not([disabled]){background:#f3f3f5}}
@media (max-width:560px){.bk{padding:12px 0 28px}.bk-head{padding:0 16px}.bk-reader{border-radius:0}.bk-page{padding:10px 8px 6px}.bk-bar{flex-wrap:wrap}.bk-bar input[type=range]{order:5;flex:1 0 100%}.bk-count{margin-right:auto}}
@media (prefers-reduced-motion:reduce){.bk-text{animation:none}.bk-side,.bk-btn,.bk-weeks a{transition:none}}