:root{--brand:#7c3aed;--brand-dark:#5b21b6;--brand-light:#ede9fe;--accent:#f97316;--accent-light:#fff7ed;--bg:#f8fafc;--surface:#fff;--text:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--success:#10b981;--danger:#ef4444;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.5}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);max-width:480px;min-height:100svh;margin:0 auto;position:relative}#app{flex-direction:column;min-height:100svh;display:flex}.btn-primary{background:var(--brand);color:#fff;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:8px;width:100%;padding:12px 24px;font-size:15px;font-weight:600;text-decoration:none;transition:background .2s,transform .1s;display:inline-flex}.btn-primary:hover{background:var(--brand-dark)}.btn-primary:active{transform:scale(.98)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{color:var(--brand);border:2px solid var(--brand);cursor:pointer;background:0 0;border-radius:12px;justify-content:center;align-items:center;gap:8px;width:100%;padding:10px 24px;font-size:15px;font-weight:600;text-decoration:none;transition:background .2s,color .2s;display:inline-flex}.btn-secondary:hover{background:var(--brand-light)}.btn-sm{border-radius:8px;padding:6px 14px;font-size:13px}.card{background:var(--surface);border-radius:16px;overflow:hidden;box-shadow:0 1px 3px #00000014,0 1px 2px #0000000a}.bottom-nav{background:var(--surface);border-top:1px solid var(--border);width:100%;max-width:480px;padding:8px 0 max(8px, env(safe-area-inset-bottom));z-index:100;justify-content:space-around;align-items:center;display:flex;position:fixed;bottom:0;left:50%;transform:translate(-50%)}.bottom-nav-item{cursor:pointer;color:var(--text-muted);background:0 0;border:none;border-radius:10px;flex-direction:column;align-items:center;gap:3px;padding:4px 12px;font-size:11px;font-weight:500;text-decoration:none;transition:background .15s;display:flex}.bottom-nav-item.active{color:var(--brand)}.bottom-nav-item svg{width:22px;height:22px}.page{flex:1;padding:0 0 80px;overflow-y:auto}.page-header{background:var(--surface);border-bottom:1px solid var(--border);z-index:50;justify-content:space-between;align-items:center;padding:16px 20px 12px;display:flex;position:sticky;top:0}.page-title{color:var(--text);font-size:20px;font-weight:700}.section{padding:20px 20px 0}.section-title{color:var(--text);margin-bottom:12px;font-size:16px;font-weight:700}.scroll-row{scrollbar-width:none;gap:12px;padding-bottom:8px;display:flex;overflow-x:auto}.scroll-row::-webkit-scrollbar{display:none}.progress-bar{background:var(--border);border-radius:3px;width:100%;height:6px;overflow:hidden}.progress-bar-fill{background:var(--brand);border-radius:3px;height:100%;transition:width .4s}.input{border:2px solid var(--border);width:100%;color:var(--text);background:var(--surface);border-radius:12px;outline:none;padding:12px 16px;font-size:15px;transition:border-color .2s}.input:focus{border-color:var(--brand)}.otp-inputs{justify-content:center;gap:10px;display:flex}.otp-box{border:2px solid var(--border);text-align:center;width:56px;height:60px;color:var(--text);background:var(--surface);border-radius:12px;outline:none;font-size:24px;font-weight:700;transition:border-color .2s}.otp-box:focus{border-color:var(--brand)}.chip{border:1px solid var(--border);background:var(--surface);color:var(--text-muted);cursor:pointer;white-space:nowrap;border-radius:20px;align-items:center;padding:4px 12px;font-size:13px;font-weight:500;transition:all .15s;display:inline-flex}.chip.active{background:var(--brand);border-color:var(--brand);color:#fff}.stars{gap:4px;display:flex}.star{cursor:pointer;font-size:20px;transition:transform .1s}.star:hover{transform:scale(1.2)}.streak-ring{background:linear-gradient(135deg, var(--accent) 0%, var(--brand) 100%);color:#fff;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:44px;height:44px;font-size:12px;font-weight:700;line-height:1;display:flex}.badge{background:var(--brand-light);color:var(--brand);border-radius:20px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:600;display:inline-flex}.empty-state{text-align:center;color:var(--text-muted);padding:40px 20px}.empty-state svg{opacity:.3;width:64px;height:64px;margin-bottom:16px}.spinner{border:3px solid var(--border);border-top-color:var(--brand);border-radius:50%;width:32px;height:32px;margin:0 auto;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.modal-overlay{z-index:200;background:#00000080;justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.modal-sheet{background:var(--surface);padding:24px 20px max(24px, env(safe-area-inset-bottom));border-radius:20px 20px 0 0;width:100%;max-width:480px;max-height:90svh;overflow-y:auto}.ebook-logo{color:var(--brand);letter-spacing:-.5px;font-size:22px;font-weight:800}.book-grid{grid-template-columns:repeat(3,1fr);gap:12px;padding:16px 20px;display:grid}.stat-card{background:var(--surface);text-align:center;border-radius:16px;padding:16px;box-shadow:0 1px 3px #0000000f}.stat-card .stat-value{color:var(--brand);font-size:28px;font-weight:800;line-height:1}.stat-card .stat-label{color:var(--text-muted);margin-top:4px;font-size:12px}.tabs{border-bottom:2px solid var(--border);scrollbar-width:none;gap:0;padding:0 20px;display:flex;overflow-x:auto}.tabs::-webkit-scrollbar{display:none}.tab{color:var(--text-muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-2px;padding:10px 16px;font-size:14px;font-weight:600;transition:color .15s,border-color .15s}.tab.active{color:var(--brand);border-bottom-color:var(--brand)}