:root{--bg:#f4f7fb;--surface:#fff;--text:#172038;--muted:#5b6475;--primary:#0d6e6e;--primary-soft:#d8f1f1;--border:#dde3ee;--danger:#b42318;--shadow:0 10px 30px rgba(20,32,61,.08)}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:Space Grotesk,Segoe UI,sans-serif;background:radial-gradient(circle at top right,#e6f7f4,var(--bg) 40%);color:var(--text)}.app-shell{min-height:100vh;display:grid;grid-template-columns:260px 1fr}.sidebar{position:-webkit-sticky;position:sticky;top:0;height:100vh;padding:28px 16px;border-left:1px solid var(--border);background:linear-gradient(180deg,#0f2d48,#123b5c);color:#f1f6ff;display:flex;flex-direction:column}.sidebar-footer{margin-top:auto;padding-top:16px;border-top:1px solid hsla(0,0%,100%,.12)}.sign-out-btn{width:100%;padding:10px;border:1px solid hsla(0,0%,100%,.2);border-radius:10px;background:hsla(0,0%,100%,.06);color:#fca5a5;font-size:.88rem;font-weight:600;cursor:pointer;transition:all .2s 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var(--border);background:#fff;max-height:400px;overflow-y:auto}.cur-book-loading{text-align:center;color:var(--muted);font-size:.85rem}.cur-book-text{white-space:pre-wrap;word-wrap:break-word;font-size:.84rem;line-height:1.8;color:var(--text);font-family:inherit;margin:0;direction:rtl}.filter-bar{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;margin-bottom:16px;padding:14px 16px;background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}.filter-group{display:flex;flex-direction:column;gap:4px;min-width:160px}.filter-label{font-size:.78rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}.filter-select{padding:8px 12px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;font-family:inherit;background:#fff;color:var(--text);cursor:pointer;direction:rtl}.filter-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px 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