:root{font-family:Noto Sans TC,Microsoft JhengHei,Inter,system-ui,sans-serif;color:#164a49;background:#f3f9f5;--teal:#006c6d;--teal-dark:#005254;--mint:#eaf6ed;--ink:#164a49;--muted:#54716c;--line:#cfe4d9;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:280px}button,input{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #7dc99b;outline-offset:3px}button:disabled{opacity:.45;cursor:not-allowed}.app-shell{min-height:100dvh;width:100%;margin:auto;display:flex;flex-direction:column}.app-shell.flip-layout{height:100dvh}.app-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex:none;min-height:76px;padding:10px clamp(18px,4vw,64px);border-top:4px solid var(--teal);border-bottom:1px solid var(--line);background:#fff}.header-copy{min-width:0}.eyebrow{display:block;font-size:.7rem;font-weight:700;letter-spacing:.14em;color:var(--teal)}.app-header h1{font-size:clamp(1.25rem,2vw,1.8rem);margin:.12rem 0 0;line-height:1.25;font-weight:800;letter-spacing:.015em;color:var(--ink)}.download-button,.toolbar button,.load-panel button,.page-message button,.viewer button{display:inline-flex;align-items:center;justify-content:center;min-height:38px;border:1px solid var(--teal);border-radius:6px;background:var(--teal);color:#fff;text-decoration:none;font-size:.88rem;font-weight:700;padding:.45rem .8rem;white-space:nowrap}.download-button:hover,.toolbar button:hover:not(:disabled),.viewer button:hover:not(:disabled){background:var(--teal-dark)}.download-button{box-shadow:0 5px 14px #006c6d20}.reader-area{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;min-width:0;padding:8px 12px;background:linear-gradient(150deg,#f7fbf8,#eaf6ed 55%,#f6faf5)}.book-stage{width:100%;height:100%;display:flex;justify-content:center;align-items:center;overflow:hidden;min-width:0}.book-page{position:relative;background:#fff;overflow:hidden;box-shadow:0 12px 32px #13534f28}.book-page img{display:block;width:100%;height:100%;object-fit:contain;background:#fff;-webkit-user-select:none;user-select:none}.page-placeholder{width:100%;height:100%;background:#f7faf8}.page-message{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:1rem;text-align:center;color:var(--muted)}.page-zoom{position:absolute;right:12px;bottom:12px;display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:50%;background:#006c6de8;color:#fff;font-size:1.25rem;opacity:.88}.page-zoom:hover{opacity:1}.toolbar{flex:none;padding:8px 12px 10px;background:#fff;border-top:1px solid var(--line);box-shadow:0 -5px 28px #1e5a4b0a}.toolbar-row{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}.navigation-row{margin-bottom:6px}.navigation-row strong{font-variant-numeric:tabular-nums;min-width:82px;text-align:center;font-size:.95rem;color:var(--ink)}.navigation-row button{min-width:102px;font-size:.9rem}.tools-row button{background:#fff;color:var(--teal)}.tools-row button:hover:not(:disabled){color:#fff}.jump-form{display:flex;align-items:center;gap:6px}.jump-form label{font-size:.84rem;color:var(--muted)}.jump-form input{width:58px;height:38px;padding:5px;border:1px solid #a4cabc;border-radius:6px;text-align:center;color:var(--ink)}.form-error{margin:6px 0 0;text-align:center;color:#b42318;font-size:.85rem}.app-footer{text-align:center;color:var(--muted);font-size:.84rem;padding:10px 16px 14px;background:#fff}.flip-layout .app-footer{display:none}.load-panel{margin:auto;padding:2rem;text-align:center}.load-panel h1{font-size:1.4rem}.image-reading{width:100%;max-width:840px;display:flex;flex-direction:column;gap:28px;padding:14px 0 30px}.reading-figure{margin:0;scroll-margin-top:18px;text-align:center}.reading-image-button{display:block;width:100%;padding:0;border:0;background:#fff;box-shadow:0 10px 28px #13534f24}.reading-image-button img{display:block;width:100%;height:auto;max-width:100%}.reading-figure figcaption{margin-top:8px;color:var(--muted);font-size:.92rem}.reading-figure .page-message{min-height:300px;background:#fff}.viewer{position:fixed;inset:0;z-index:1000;display:flex;flex-direction:column;background:#102d2c;color:#fff}.viewer-header{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:64px;padding:10px 16px;background:#092222}.viewer-actions{display:flex;align-items:center;gap:7px}.viewer-actions button{padding:.45rem .65rem;border-color:#8bbcb1;background:#164a49}.viewer-actions span{min-width:52px;text-align:center;font-variant-numeric:tabular-nums}.viewer-canvas{position:relative;flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;touch-action:none;cursor:grab}.viewer-canvas:active{cursor:grabbing}.viewer-canvas img{display:block;max-width:95%;max-height:100%;width:auto;height:auto;object-fit:contain;-webkit-user-select:none;user-select:none;will-change:transform}.viewer-canvas img.is-hidden{visibility:hidden}.viewer-status{position:absolute;display:flex;align-items:center;gap:12px;z-index:1}.viewer-hint{text-align:center;margin:0;padding:8px;font-size:.82rem;color:#d2e5dd;background:#092222}@media(max-width:759px){.app-header{align-items:center;gap:8px;min-height:0;padding:8px 12px}.app-header h1{font-size:1.08rem;line-height:1.25;margin:0}.eyebrow{display:none}.download-button{min-height:38px;padding:.35rem .55rem;font-size:.8rem}.reader-area{padding:6px 5px}.toolbar{padding:7px 6px 9px}.toolbar-row{gap:6px}.toolbar button{min-height:40px;padding:.38rem .55rem;font-size:.84rem}.navigation-row{margin-bottom:6px}.navigation-row button{min-width:82px}.navigation-row strong{min-width:65px;font-size:.9rem}.tools-row{gap:6px}.jump-form label{display:none}.jump-form input{width:52px;height:40px}.app-footer{display:none}.viewer-header{flex-wrap:wrap;justify-content:center;padding:7px}.viewer-actions{gap:4px}.viewer-actions button{padding:.37rem .46rem;font-size:.82rem}.viewer-hint{font-size:.68rem}}@media(max-height:550px)and (orientation:landscape){.app-header{align-items:center;gap:8px;padding-block:6px;border-top-width:3px}.app-header h1{font-size:1rem;margin:0}.eyebrow{display:none}.download-button{min-height:34px;font-size:.8rem;padding:.3rem .55rem}.toolbar{padding-block:5px}.toolbar-row{display:inline-flex;vertical-align:middle;gap:5px}.navigation-row{margin:0 12px 0 0}.toolbar button,.jump-form input{min-height:34px;height:34px;padding:.28rem .45rem;font-size:.8rem}.jump-form label,.app-footer{display:none}}.page-loading{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);font-size:.85rem}.book-frame{flex:none;position:relative}