:root{--bg-app:#000;--bg-surface:#121214;--bg-card:#1c1c1e;--bg-card-secondary:#2c2c2e;--bg-card-hover:#242426;--bg-input:#151517;--apple-blue:#0a84ff;--apple-blue-hover:#0071e3;--apple-green:#30d158;--apple-red:#ff453a;--apple-amber:#ffd60a;--apple-indigo:#5e5ce6;--text-primary:#fff;--text-secondary:#a1a1a6;--text-tertiary:#636366;--text-quaternary:#48484a;--border-subtle:#ffffff14;--border-hover:#ffffff26;--border-focus:#0a84ff80;--font-sans:-apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Helvetica, Arial, sans-serif;--font-mono:ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;--radius-xs:6px;--radius-sm:10px;--radius-md:14px;--radius-lg:18px;--radius-full:980px;--shadow-subtle:0 4px 20px #00000040;--shadow-float:0 12px 32px #00000073;--sat:env(safe-area-inset-top,0px);--sar:env(safe-area-inset-right,0px);--sab:env(safe-area-inset-bottom,0px);--sal:env(safe-area-inset-left,0px)}*,:before,:after{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;width:100%;max-width:100vw;height:100%;overflow-x:hidden}body{font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;width:100%;max-width:100vw;min-height:100dvh;padding-bottom:max(3.5rem, calc(2.5rem + 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var(--border-subtle);border-radius:var(--radius-lg);width:90%;max-width:440px;box-shadow:var(--shadow-float);padding:1.5rem}.modal-title{margin-bottom:.4rem;font-size:1.15rem;font-weight:600}.modal-desc{color:var(--text-secondary);margin-bottom:1.25rem;font-size:.82rem;line-height:1.5}.form-group{margin-bottom:1rem}.form-label{color:var(--text-secondary);margin-bottom:.4rem;font-size:.75rem;font-weight:500;display:block}.form-input,.form-select{background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:#fff;width:100%;font-size:16px;font-family:var(--font-sans);-webkit-appearance:none;min-height:42px;padding:10px 12px;transition:border-color .2s}.form-input:focus,.form-select:focus{border-color:var(--border-focus);outline:none}.modal-actions{justify-content:flex-end;gap:8px;margin-top:1.5rem;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.segmented-control-wrap{justify-content:center;margin-bottom:2rem;display:flex}.segmented-control{border-radius:var(--radius-full);border:1px solid var(--border-subtle);background:#ffffff0f;gap:2px;padding:3px;display:inline-flex}.segmented-btn{color:var(--text-secondary);font-family:var(--font-sans);border-radius:var(--radius-full);cursor:pointer;background:0 0;border:none;align-items:center;gap:6px;padding:6px 16px;font-size:.84rem;font-weight:500;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex}.segmented-btn:hover{color:var(--text-primary)}.segmented-btn.active{color:#fff;background:#ffffff24;box-shadow:0 2px 8px #0000004d}.domain-bar{scrollbar-width:none;gap:8px;margin-bottom:1.5rem;padding-bottom:4px;display:flex;overflow-x:auto}.domain-bar::-webkit-scrollbar{display:none}.domain-pill{border:1px solid var(--border-subtle);color:var(--text-secondary);font-family:var(--font-sans);border-radius:var(--radius-full);cursor:pointer;white-space:nowrap;background:0 0;padding:6px 14px;font-size:.8rem;font-weight:500;transition:all .18s}.domain-pill:hover{color:var(--text-primary);background:#ffffff0d}.domain-pill.active{color:#000;background:#fff;border-color:#fff;font-weight:600}.books-grid{flex-direction:column;gap:1.5rem;margin-bottom:2rem;display:flex}.book-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1.5rem;transition:border-color .2s,transform .2s}.book-card:hover{border-color:var(--border-hover)}.book-meta{border-bottom:.5px solid 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.2s}.search-input:focus{border-color:var(--border-focus);background:var(--bg-card-hover);outline:none}.search-icon-inside{color:var(--text-tertiary);pointer-events:none;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.drop-zone{border:1px dashed var(--border-subtle);border-radius:var(--radius-md);text-align:center;cursor:pointer;background:#ffffff05;margin-bottom:1rem;padding:1.5rem;transition:all .2s}.drop-zone:hover,.drop-zone.drag-active{border-color:var(--apple-blue);background:#0a84ff0d}.drop-icon{color:var(--apple-blue);margin-bottom:6px}.drop-text{color:var(--text-primary);font-size:.88rem;font-weight:500}.drop-hint{color:var(--text-tertiary);margin-top:2px;font-size:.75rem}.dialogue-thread{flex-direction:column;gap:12px;margin-bottom:1.5rem;display:flex}.chat-bubble{border-radius:var(--radius-md);max-width:92%;padding:1rem 1.25rem;font-size:.94rem;line-height:1.55;animation:.25s fadeIn}.chat-bubble.socrates{border:1px solid var(--border-subtle);color:var(--text-primary);background:#ffffff0a;align-self:flex-start}.chat-bubble.socrates .speaker{text-transform:uppercase;letter-spacing:.4px;color:var(--apple-blue);margin-bottom:4px;font-size:.72rem;font-weight:600}.chat-bubble.user{background:var(--apple-blue);color:#fff;border-radius:18px 18px 4px;align-self:flex-end}.vault-overlay{-webkit-backdrop-filter:blur(16px);z-index:100;opacity:0;pointer-events:none;background:#000000a6;justify-content:flex-end;transition:opacity .2s;display:flex;position:fixed;inset:0}.vault-overlay.open{opacity:1;pointer-events:auto}.vault-panel{background:var(--bg-surface);border-left:1px solid var(--border-subtle);width:100%;max-width:480px;height:100dvh;padding:1.75rem;padding-top:max(1.75rem, calc(1rem + var(--sat)));padding-bottom:max(2rem, calc(1.5rem + var(--sab)));padding-left:max(1.25rem, var(--sal));padding-right:max(1.25rem, var(--sar));-webkit-overflow-scrolling:touch;flex-direction:column;transition:transform .28s 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.2s}.vault-item:hover{border-color:var(--border-hover)}.vault-item-top{justify-content:space-between;align-items:flex-start;margin-bottom:6px;display:flex}.vault-item-title{color:var(--text-primary);font-size:.95rem;font-weight:600}.vault-item-date{color:var(--text-tertiary);font-size:.72rem}.vault-item-lever{color:var(--text-secondary);margin-bottom:8px;font-size:.84rem;line-height:1.45}.vault-action-check{color:var(--text-tertiary);cursor:pointer;border-top:.5px solid var(--border-subtle);align-items:center;gap:8px;padding-top:6px;font-size:.78rem;display:flex}.vault-action-check.completed{color:var(--apple-green);font-weight:500}.vault-empty-state{text-align:center;color:var(--text-tertiary);padding:3rem 1rem;font-size:.9rem}.learning-settings-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);flex-direction:column;gap:1rem;margin-bottom:1.5rem;padding:1.25rem 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