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var(--border);min-height:44px;color:var(--accent-strong);font:inherit;cursor:pointer;background:#fff;border-radius:8px;justify-content:center;align-items:center;padding:0 18px;font-size:14px;font-weight:800;transition:border-color .18s,box-shadow .18s,background-color .18s,transform .18s;display:inline-flex}.dashboard-back-button:hover{background:var(--surface-strong);border-color:#0f766e4d;transform:translateY(-1px);box-shadow:0 12px 24px #2b231814}.dashboard-back-button:focus-visible{border-color:var(--accent);outline:none;box-shadow:0 0 0 4px #0f766e24}.detail-heading{flex:1;grid-template-columns:96px minmax(0,1fr);align-items:start;gap:20px;min-width:0;display:grid}.detail-heading-cover{width:96px;color:inherit;cursor:zoom-in;background:0 0;border:0;border-radius:6px;justify-content:center;padding:0;text-decoration:none;display:flex}.detail-heading-cover img{object-fit:contain;border-radius:6px;width:100%;height:auto;max-height:140px;box-shadow:0 14px 28px #18201f29}.detail-heading-cover-empty{cursor:default}.detail-heading-cover-empty .book-cover-placeholder{min-height:132px}.detail-heading-cover:focus-visible{outline:none;box-shadow:0 0 0 4px #0f766e24}.detail-heading-cover[href]{cursor:pointer}.detail-heading-content{min-width:0}.video-heading{flex:1;min-width:0}.detail-meta-row{flex-wrap:wrap;gap:10px 18px;margin-top:8px;display:flex}.detail-meta-row span,.detail-meta-row strong{letter-spacing:0;font-size:13px;font-weight:800}.detail-meta-row span{color:var(--accent)}.detail-meta-row strong{color:var(--accent-strong)}.book-detail-view{gap:22px;animation:.24s ease-out detail-view-in;display:grid}.detail-video-panel{border:1px solid var(--border);background:#ffffffeb;border-radius:8px;padding:22px;box-shadow:0 14px 38px #2b231814}.detail-section-header{justify-content:space-between;align-items:flex-end;gap:18px;margin-bottom:18px;display:flex}.detail-section-header h2{color:var(--foreground);margin-top:8px;font-size:26px;font-weight:850;line-height:1.2}.detail-section-header>span{border:1px solid var(--border);background:var(--surface-strong);color:var(--accent-strong);border-radius:8px;flex:none;padding:9px 12px;font-size:13px;font-weight:800}.video-list{gap:12px;list-style:none;display:grid}.video-list-item{color:inherit;border:1px solid var(--border);background:#fff;border-radius:8px;grid-template-columns:52px minmax(0,1fr);align-items:center;gap:14px;padding:16px;text-decoration:none;transition:border-color .18s,box-shadow .18s,transform .18s;display:grid}.video-list-item:hover{border-color:#0f766e3d;transform:translateY(-1px);box-shadow:0 12px 24px #2b231814}.video-list-item:focus-visible{border-color:var(--accent);outline:none;box-shadow:0 0 0 4px #0f766e24}.video-index{color:#f8fbf9;background:var(--accent-strong);width:52px;height:52px;font-family:var(--font-geist-mono), monospace;border-radius:8px;place-items:center;font-size:14px;font-weight:850;display:grid}.video-info{min-width:0}.video-info h3{color:var(--foreground);overflow-wrap:anywhere;font-size:17px;font-weight:800;line-height:1.3}.video-info dl{flex-wrap:wrap;gap:12px 20px;margin-top:10px;display:flex}.video-info dl div{color:var(--muted);gap:6px;font-size:13px;display:flex}.video-info dt{font-weight:700}.video-info dd{color:var(--accent-strong);margin:0;font-weight:800}.video-player-panel{border:1px solid var(--border);background:#ffffffeb;border-radius:8px;padding:18px;animation:.24s ease-out detail-view-in;box-shadow:0 18px 46px #2b23181a}.video-player{aspect-ratio:16/9;background:#0e1d1b;border-radius:8px;width:100%;display:block}.video-player-empty{color:#fff;text-align:center;background:#0e1d1b;border-radius:8px;place-items:center;min-height:280px;font-size:15px;font-weight:800;display:grid}.video-player-empty-error{color:#ffd8cf;background:#2a1714}.cover-lightbox{z-index:30;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0c1413b8;place-items:center;padding:28px;animation:.18s ease-out lightbox-in;display:grid;position:fixed;inset:0}.cover-lightbox-image{place-items:center;max-width:min(900px,92vw);max-height:calc(100vh - 72px);animation:.22s ease-out cover-zoom-in;display:grid}.cover-lightbox-image img{object-fit:contain;border-radius:8px;width:auto;max-width:min(900px,92vw);height:auto;max-height:calc(100vh - 72px);box-shadow:0 34px 90px #0000006b}.cover-lightbox-close{z-index:31;color:#fff;cursor:pointer;width:44px;height:44px;font:inherit;background:#ffffff1f;border:1px solid #fff3;border-radius:8px;place-items:center;font-size:28px;line-height:1;display:grid;position:fixed;top:24px;right:24px}.cover-lightbox-close:focus-visible{outline:none;box-shadow:0 0 0 4px #ffffff3d}@keyframes detail-view-in{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes lightbox-in{0%{opacity:0}to{opacity:1}}@keyframes cover-zoom-in{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}@media (max-width:920px){.dashboard-header h1{font-size:34px}.book-grid{grid-template-columns:1fr}}@media (max-width:560px){.dashboard-shell{width:min(100% - 32px,1180px);padding-top:32px}.dashboard-header{flex-direction:column;align-items:flex-start}.dashboard-header-actions{flex-wrap:wrap;justify-content:flex-start;width:100%}.dashboard-user-card{flex:220px}.logout-button{flex:128px}.dashboard-header-detail{gap:18px}.dashboard-back-button{width:100%}.detail-heading{grid-template-columns:72px minmax(0,1fr);gap:14px}.detail-heading-cover{width:72px}.detail-heading-cover img{max-height:108px}.book-card-button{grid-template-columns:112px minmax(0,1fr);gap:14px;padding:12px}.book-cover-frame{width:112px;min-height:154px}.book-cover-frame img{max-height:164px}.book-content h2{font-size:18px}.detail-video-panel{padding:16px}.detail-section-header{flex-direction:column;align-items:flex-start}.video-list-item{grid-template-columns:44px minmax(0,1fr);padding:14px}.video-index{width:44px;height:44px}.video-player-panel{padding:10px}}@media (prefers-reduced-motion:reduce){.book-card-button,.dashboard-back-button,.detail-heading-cover,.book-detail-view,.cover-lightbox,.cover-lightbox-image,.video-player-panel,.video-list-item{transition:none;animation:none}}