:root{--bg:#f6f7fb;--card:#fff;--primary:#2563eb;--text:#172033;--muted:#64748b;--border:#dbe3ef}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:var(--primary)}.topbar{background:#0f172a;color:#fff;padding:14px 22px;display:flex;justify-content:space-between;align-items:center}.topbar a{color:#fff;margin-left:14px}.container{max-width:1180px;margin:24px auto;padding:0 16px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:0 6px 18px rgba(15,23,42,.06);margin-bottom:16px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.btn{display:inline-block;border:none;background:var(--primary);color:#fff;padding:10px 14px;border-radius:10px;cursor:pointer;font-weight:700}.btn.secondary{background:#334155}.btn.danger{background:#dc2626}.input,select,textarea{width:100%;padding:11px;border:1px solid var(--border);border-radius:10px;background:#fff;margin:6px 0 12px}textarea{min-height:100px}.muted{color:var(--muted);font-size:14px}.reader{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:16px}.pdfbox{background:#1e293b;border-radius:16px;padding:12px;text-align:center}.pdfbox canvas{max-width:100%;background:#fff;border-radius:8px}.toolbar{display:flex;gap:8px;justify-content:center;align-items:center;margin-bottom:10px;flex-wrap:wrap}.toolbar button{padding:8px 10px;border:0;border-radius:8px;cursor:pointer}.note{border-left:4px solid var(--primary);padding:10px;margin:8px 0;background:#f8fafc;border-radius:8px}.badge{display:inline-block;background:#e2e8f0;border-radius:999px;padding:4px 8px;font-size:12px}.login{max-width:420px;margin:60px auto}.alert{background:#fee2e2;color:#991b1b;padding:10px;border-radius:10px;margin-bottom:10px}@media(max-width:900px){.reader{grid-template-columns:1fr}.topbar{display:block}.topbar nav{margin-top:8px}}

.brand{display:flex;align-items:center;gap:8px}.brand img{width:28px;height:28px;object-fit:contain;border-radius:6px}.topbar nav{display:flex;gap:14px;align-items:center}.topbar a{margin-left:0}.reader.clean{grid-template-columns:minmax(0,1fr) 360px}.reader-full{max-width:100%;}.pdfbox.clean{min-height:calc(100vh - 150px);position:relative;overflow:auto}.reader-title-row{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}.reader-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.quick-page{display:flex;gap:6px;align-items:center}.quick-page input{width:90px;padding:8px;border-radius:8px;border:1px solid var(--border);margin:0}.sidepanel h2{margin-top:0}.panel-tabs{display:flex;gap:6px;margin-bottom:12px}.panel-tabs button{flex:1;border:1px solid var(--border);background:#fff;border-radius:10px;padding:9px;cursor:pointer}.panel-tabs button.active{background:var(--primary);color:#fff}.panel-section{display:none}.panel-section.active{display:block}.bookmark-item{display:block;width:100%;text-align:left;background:#f8fafc;border:1px solid var(--border);border-radius:10px;padding:10px;margin:8px 0;cursor:pointer}.bookmark-item b{display:block}.float-reader-buttons{display:none}.mobile-sheet-backdrop{display:none}.mobile-sheet{display:none}.reader-hint{color:#cbd5e1;font-size:13px;margin-top:6px}.pdf_canvas_wrap{display:inline-block;touch-action:pan-y;background:#fff;border-radius:8px}
@media(max-width:900px){.topbar{display:flex;gap:10px}.topbar nav{overflow-x:auto;white-space:nowrap;padding-bottom:2px}.reader.clean{display:block}.sidepanel{display:none}.container.reader-container{margin:10px auto;padding:0 8px}.reader-title-row h1{font-size:20px;margin:8px 0}.pdfbox.clean{border-radius:12px;padding:8px;min-height:calc(100vh - 120px)}.toolbar{position:sticky;top:0;z-index:3;background:#1e293b;padding:6px;border-radius:10px}.toolbar button{font-size:12px}.quick-page{display:none}.float-reader-buttons{display:flex;position:fixed;right:14px;bottom:16px;z-index:50;flex-direction:column;gap:10px}.float-reader-buttons button{width:52px;height:52px;border:0;border-radius:999px;background:var(--primary);color:#fff;box-shadow:0 8px 24px rgba(15,23,42,.25);font-size:20px}.mobile-sheet-backdrop.show{display:block;position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:60}.mobile-sheet.show{display:block;position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;border-radius:18px 18px 0 0;padding:16px;max-height:82vh;overflow:auto;box-shadow:0 -12px 32px rgba(15,23,42,.25)}.mobile-sheet-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.mobile-sheet-header button{border:0;background:#e2e8f0;border-radius:999px;width:36px;height:36px}.reader-hint{display:block}.pdf_canvas_wrap{width:100%;overflow:auto}.pdfbox canvas{width:100%;height:auto}}