:root{--paper-bg: #e7e3da;--panel-bg: #f8f4ea;--panel-soft: rgba(248, 244, 234, .9);--ink: #25231f;--muted: #6f685e;--hairline: #ded7ca;--accent: #d7b85d;--accent-strong: #b9922e;--reader-bg: #fff;--shadow: 0 12px 34px rgba(61, 52, 39, .18);color:var(--ink);background:var(--paper-bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--paper-bg)}button{font:inherit}.bookshelf,.reader-shell{min-height:100vh;min-height:100dvh}.bookshelf{padding:max(28px,env(safe-area-inset-top)) max(28px,env(safe-area-inset-right)) max(36px,env(safe-area-inset-bottom)) max(28px,env(safe-area-inset-left));background:#fff}.shelf-panel{width:min(420px,100%);padding:24px;border:1px solid var(--hairline);border-radius:8px;background:var(--panel-bg);box-shadow:var(--shadow)}.shelf-panel h1{margin:0 0 8px;font-size:24px}.shelf-panel p{margin:0;color:var(--muted)}.shelf-header{max-width:1180px;margin:0 auto 26px}.shelf-header h1{margin:0 0 4px;font-size:34px;line-height:1.15;letter-spacing:0}.shelf-header p{margin:0;color:#7d7d83;font-size:15px}.shelf-grid{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(148px,1fr));gap:34px 30px;align-items:start}.book-tile{min-width:0;padding:0;border:0;background:transparent;color:#1f1f22;text-align:left}.book-cover{position:relative;display:block;width:100%;aspect-ratio:.68;margin-bottom:12px;border-radius:3px 7px 7px 3px;overflow:hidden;background:#f2f2f2;box-shadow:0 18px 28px #00000029,4px 0 #00000014 inset}.book-cover:after{content:"";position:absolute;inset:0 auto 0 0;width:10px;background:linear-gradient(90deg,rgba(0,0,0,.2),rgba(255,255,255,.16),transparent);pointer-events:none}.book-cover img{display:block;width:100%;height:100%;object-fit:cover}.book-cover span{display:grid;width:100%;height:100%;place-items:center;color:#777;font-size:54px;font-weight:700}.book-tile strong,.book-tile small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.book-tile strong{font-size:14px;line-height:1.35}.book-tile small{margin-top:4px;color:#8a8a91;font-size:12px}.reader-shell{position:relative;overflow:hidden;background:var(--reader-bg)}.toolbar{position:fixed;z-index:10;top:max(12px,env(safe-area-inset-top));left:max(12px,env(safe-area-inset-left));right:max(12px,env(safe-area-inset-right));height:48px;display:grid;grid-template-columns:44px 1fr 44px 44px;gap:10px;align-items:center;opacity:0;pointer-events:none;transition:opacity .16s ease}.toolbar.is-visible{opacity:1;pointer-events:auto}.icon-button,.action-chip{border:1px solid transparent;color:inherit;background:var(--panel-soft);box-shadow:0 5px 18px #3d34271f}.icon-button{width:44px;height:44px;border-radius:999px;font-size:24px}.text-button{font-size:12px;font-weight:700}.title-block{min-width:0;padding:8px 12px;border-radius:8px;background:var(--panel-soft);box-shadow:0 5px 18px #3d34271f;text-align:center}.title-block strong,.title-block span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.title-block strong{font-size:14px}.title-block span{color:var(--muted);font-size:12px}.page-stage{position:fixed;inset:0;display:grid;place-items:center;background:var(--reader-bg);padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);touch-action:pan-y}.page-frame{position:relative;z-index:2;width:min(100vw,calc(100dvh * var(--page-aspect)));aspect-ratio:var(--page-aspect);max-height:100dvh;display:grid;place-items:center;will-change:transform,opacity}.turn-in-next{animation:page-in-next .18s ease-out}.turn-in-prev{animation:page-in-prev .18s ease-out}.page-image{display:block;width:100%;height:100%;object-fit:contain;user-select:none;-webkit-user-select:none}.hit-layer{position:absolute;z-index:3;inset:0;pointer-events:none}.region{position:absolute;padding:0;border:0;background:transparent;pointer-events:auto}.study-mode .region{outline:2px solid rgba(183,146,46,.82);background:#d7b85d2e}.sheet{position:fixed;z-index:20;left:env(safe-area-inset-left);right:env(safe-area-inset-right);max-height:32dvh;overflow:auto;padding:8px 18px 14px;background:#f8f4eaf7;color:var(--ink)}.sheet-top{top:0;padding-top:calc(8px + env(safe-area-inset-top));border-bottom:1px solid var(--hairline);border-radius:0 0 8px 8px;box-shadow:0 16px 42px #3d34272e}.sheet-bottom{bottom:0;padding-bottom:calc(14px + env(safe-area-inset-bottom));border-top:1px solid var(--hairline);border-radius:8px 8px 0 0;box-shadow:0 -16px 42px #3d34272e}.grabber{width:36px;height:3px;margin:0 auto 8px;border-radius:99px;background:#c8bead}.jp-text{margin:0;font-size:18px;line-height:1.65}.inline-token{margin:0 1px;padding:1px 0;border:0;border-radius:0;background:transparent;color:inherit;text-decoration:underline;text-decoration-color:#b9922e9e;text-decoration-thickness:1.5px;text-underline-offset:5px}.inline-token.is-active{color:#8d6915;text-decoration-color:#b9922e}.inline-token:focus-visible{outline:2px solid rgba(185,146,46,.5);outline-offset:3px}.action-row{display:flex;gap:8px;margin-top:10px}.action-chip{min-height:32px;padding:0 13px;border-radius:999px;color:var(--muted)}.action-chip.is-active{color:var(--ink);background:#efd986;border-color:#e0c56d}.token-detail,.detail-panel{margin:10px 0 0;border:1px solid #eadfca;border-radius:8px;background:#fffaf0;color:var(--muted);font-size:13.5px}.token-detail{position:relative;display:flex;flex-wrap:wrap;gap:6px 12px;align-items:baseline;padding:8px 42px 8px 10px}.token-detail strong{color:var(--ink);font-size:16px}.token-detail small{flex-basis:100%}.vocab-star{position:absolute;top:7px;right:8px;width:28px;height:28px;padding:0;border:0;border-radius:999px;background:transparent;color:#a0832c;font-size:22px;line-height:1}.vocab-star.is-active{color:#b9922e}.detail-panel{padding:9px 10px;line-height:1.5}.detail-panel strong,.detail-panel span{display:block}.detail-panel strong{margin-bottom:2px;color:var(--ink)}.muted{color:var(--muted)}@keyframes page-in-next{0%{opacity:.72;transform:translate(22px)}to{opacity:1;transform:translate(0)}}@keyframes page-in-prev{0%{opacity:.72;transform:translate(-22px)}to{opacity:1;transform:translate(0)}}@media(orientation:landscape){.page-frame{width:min(58vw,70dvh)}}