:root{--primary:#831238;--primary-dark:#5f0d29;--primary-deep:#47081e;--white:#fff;--muted:#776b71;--border:#ded7da}
*{box-sizing:border-box}html,body{width:100%;height:100%;margin:0}body{font-family:Arial,Helvetica,sans-serif;display:flex;flex-direction:column;overflow:hidden;background:#dedede}
.book-header{min-height:66px;padding:8px 18px;display:flex;align-items:center;justify-content:space-between;gap:18px;color:#fff;background:linear-gradient(120deg,var(--primary-deep),var(--primary));box-shadow:0 3px 16px rgba(0,0,0,.22);z-index:100}
.book-title{display:flex;align-items:center;gap:11px;min-width:0}.book-title-icon{width:42px;height:42px;flex:0 0 42px;border-radius:9px;display:grid;place-items:center;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.18);font-size:18px}.book-title-text{min-width:0}.book-title-text strong{display:block;max-width:650px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}.book-title-text span{display:block;margin-top:3px;font-size:10px;opacity:.75}
.book-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}.book-actions button,.download-button{height:36px;border:1px solid rgba(255,255,255,.25);border-radius:7px;background:rgba(255,255,255,.1);color:#fff;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;cursor:pointer;transition:.18s}.book-actions button{width:36px;padding:0}.download-button{padding:0 12px;gap:6px;font-size:11px;font-weight:700}.book-actions button:hover,.download-button:hover{background:#fff;color:var(--primary)}.zoom-level{min-width:48px;text-align:center;font-size:11px;font-weight:800}
.reader-area{flex:1 1 auto;min-height:0;width:100%;display:flex;align-items:center;justify-content:center;gap:12px;padding:12px 16px;overflow:hidden;background:radial-gradient(circle at center,#f5f5f5 0%,#dedede 55%,#c7c7c7 100%)}
.book-container{flex:1 1 auto;min-width:0;min-height:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;overflow:auto;scrollbar-width:thin}
#zoomWrapper{display:inline-block;transform-origin:center center;transition:transform .18s ease}#book{width:840px;height:594px;margin:0 auto;position:relative}
.pdf-page{background:#fff;overflow:hidden;position:relative;box-shadow:0 2px 12px rgba(0,0,0,.18)}.pdf-page canvas{display:block;width:100%;height:100%;object-fit:contain;background:#fff}.pdf-page::after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 0 2px rgba(0,0,0,.14)}
.nav-button{width:46px;height:46px;flex:0 0 46px;border:0;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:16px;cursor:pointer;box-shadow:0 5px 18px rgba(0,0,0,.22);transition:.18s}.nav-button:hover{background:var(--primary-dark);transform:scale(1.07)}
.book-footer{min-height:38px;flex:0 0 38px;padding:0 18px;display:flex;align-items:center;justify-content:center;gap:24px;background:#fff;border-top:1px solid var(--border);color:var(--muted);font-size:11px}.page-status{font-weight:700;color:var(--primary)}.reader-hint{display:flex;align-items:center;gap:5px}
@media(max-width:700px){.book-header{min-height:58px;padding:7px 10px}.book-title-icon{width:36px;height:36px;flex-basis:36px}.book-title-text strong{max-width:170px;font-size:11px}.book-title-text span,.zoom-level,.reader-hint{display:none}.download-button{width:36px;padding:0}.download-button span{display:none}.reader-area{gap:4px;padding:7px 4px}.nav-button{width:34px;height:34px;flex-basis:34px;font-size:12px}.book-footer{min-height:32px;flex-basis:32px}}