@import"https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;600&display=swap";:root{--bg-deep: #0a0e1a;--bg-primary: #0f1729;--bg-secondary: #151d33;--bg-card: rgba(21, 29, 51, .7);--bg-glass: rgba(15, 23, 41, .6);--bg-hover: rgba(30, 41, 74, .6);--accent-primary: #00d4ff;--accent-secondary: #a855f7;--accent-gradient: linear-gradient(135deg, #00d4ff, #a855f7);--accent-gradient-hover: linear-gradient(135deg, #22d3ee, #c084fc);--accent-glow: 0 0 20px rgba(0, 212, 255, .15);--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--text-accent: #22d3ee;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--info: #3b82f6;--border-subtle: rgba(51, 65, 85, .5);--border-accent: rgba(0, 212, 255, .2);--font-sans: "Sora", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4);--shadow-glow: 0 0 30px rgba(0, 212, 255, .1);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--glass-blur: blur(16px);--glass-border: 1px solid rgba(255, 255, 255, .06)}:root[data-theme=light]{--bg-deep: #eef0f3;--bg-primary: #f4f5f7;--bg-secondary: #eaedf1;--bg-card: rgba(248, 249, 251, .96);--bg-glass: rgba(242, 244, 247, .92);--bg-hover: rgba(148, 163, 184, .14);--text-primary: #0f172a;--text-secondary: #334155;--text-muted: #64748b;--border-subtle: rgba(148, 163, 184, .36);--border-accent: rgba(100, 116, 139, .36);--glass-border: 1px solid rgba(2, 6, 23, .12);--shadow-sm: 0 2px 12px rgba(2, 6, 23, .1);--shadow-md: 0 6px 24px rgba(2, 6, 23, .15);--shadow-lg: 0 12px 48px rgba(2, 6, 23, .2);--accent-glow: 0 0 24px rgba(2, 132, 199, .25)}:root[data-theme=light] .app{background:radial-gradient(ellipse at 20% 50%,rgba(148,163,184,.08) 0%,transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(203,213,225,.13) 0%,transparent 60%),var(--bg-deep)}:root[data-theme=light] .workspace-sidebar,:root[data-theme=light] .workspace-sidebar-right,:root[data-theme=light] .workspace-main,:root[data-theme=light] .chat-header,:root[data-theme=light] .chat-input-area,:root[data-theme=light] .workspace-topbar{background:var(--bg-glass)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background:var(--bg-deep);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow:hidden}#root{min-height:100vh}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-subtle);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}@keyframes shimmer{0%{background-position:-200% center}to{background-position:200% center}}@keyframes bounceIn{0%{transform:scale(.8);opacity:0}50%{transform:scale(1.05)}to{transform:scale(1);opacity:1}}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}@keyframes viewIn{0%{opacity:0;transform:translateY(10px) scale(.995)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes viewOut{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-6px)}}.app{min-height:100vh;display:flex;flex-direction:column;position:relative;isolation:isolate;background:radial-gradient(ellipse at 20% 50%,rgba(0,212,255,.03) 0%,transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(168,85,247,.03) 0%,transparent 60%),var(--bg-deep)}.app:before,.app:after{content:"";position:absolute;inset:0;pointer-events:none;z-index:-1}.app:before{background:radial-gradient(circle at 10% 20%,rgba(0,212,255,.1),transparent 38%),radial-gradient(circle at 85% 10%,rgba(16,185,129,.08),transparent 35%),radial-gradient(circle at 70% 90%,rgba(168,85,247,.12),transparent 40%);filter:blur(10px);animation:auraDrift 16s ease-in-out infinite alternate}.app:after{background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:42px 42px;mask-image:radial-gradient(circle at 50% 40%,black 20%,transparent 78%);opacity:.6}@keyframes auraDrift{0%{transform:translateZ(0) scale(1)}to{transform:translate3d(0,-14px,0) scale(1.04)}}.app-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);background:var(--bg-glass);backdrop-filter:var(--glass-blur);border-bottom:var(--glass-border);z-index:10}.app-logo{display:flex;align-items:center;gap:var(--space-sm)}.app-logo h1{font-size:1.25rem;font-weight:700;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.app-logo-icon{font-size:1.5rem}.app-header-actions{display:flex;align-items:center;gap:var(--space-sm)}.theme-toggle{display:inline-flex;align-items:center;cursor:pointer}.theme-toggle input{display:none}.theme-toggle-track{width:56px;height:32px;border-radius:var(--radius-full);border:var(--glass-border);background:var(--bg-card);display:inline-flex;align-items:center;padding:4px;transition:all var(--transition-fast)}.theme-toggle-thumb{width:24px;height:24px;border-radius:9999px;background:var(--accent-gradient);display:inline-flex;align-items:center;justify-content:center;color:#fff;transform:translate(0);transition:transform var(--transition-fast);font-size:.85rem}:root[data-theme=light] .theme-toggle-thumb{transform:translate(24px)}.icon-btn{width:38px;height:38px;border-radius:var(--radius-sm);border:var(--glass-border);background:var(--bg-card);color:var(--text-primary);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.icon-btn:hover{transform:translateY(-1px);border-color:var(--border-accent);box-shadow:var(--shadow-md)}.icon-btn:active{transform:translateY(0)}.settings-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:110;padding:var(--space-lg);animation:fadeIn .2s ease}.settings-panel{background:var(--bg-primary);border:var(--glass-border);border-radius:var(--radius-xl);width:100%;max-width:720px;max-height:90vh;overflow-y:auto;padding:var(--space-xl);box-shadow:var(--shadow-lg)}.settings-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-lg)}.settings-header h2{font-size:1.25rem;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.settings-close{width:36px;height:36px;border-radius:var(--radius-sm);border:var(--glass-border);background:var(--bg-card);color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast)}.settings-close:hover{color:var(--error);border-color:var(--error)}.settings-note{padding:var(--space-md);border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:#3b82f614;color:var(--text-secondary);margin-bottom:var(--space-lg)}.settings-section{margin-bottom:var(--space-xl);padding-bottom:var(--space-xl);border-bottom:1px solid var(--border-subtle)}.settings-section:last-of-type{border-bottom:none;padding-bottom:0}.settings-section h3{font-size:1rem;font-weight:700;margin-bottom:var(--space-md)}.settings-divider{height:1px;background:var(--border-subtle);margin:var(--space-lg) 0}.settings-field{display:flex;flex-direction:column;gap:var(--space-sm);margin-bottom:var(--space-md)}.settings-field label{font-size:.85rem;color:var(--text-secondary)}.settings-field input{width:100%;padding:10px 12px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);outline:none;transition:border-color var(--transition-fast)}.settings-field input:focus{border-color:#22d3ee99;box-shadow:0 0 0 3px #22d3ee1f}.settings-hint{font-size:.8rem;color:var(--text-muted)}.settings-row{display:flex;flex-wrap:wrap;gap:var(--space-md);align-items:center;margin-bottom:var(--space-md)}.settings-radio{display:inline-flex;align-items:center;gap:var(--space-sm);padding:10px 12px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);cursor:pointer;user-select:none}.settings-radio input{accent-color:var(--accent-primary)}.settings-checkbox{display:inline-flex;align-items:center;gap:var(--space-sm);font-size:.85rem;color:var(--text-secondary);cursor:pointer;user-select:none}.settings-checkbox input{accent-color:var(--accent-primary)}.settings-footer{display:flex;justify-content:flex-end;gap:var(--space-sm);margin-top:var(--space-lg)}.settings-btn{padding:10px 14px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast)}.settings-btn.primary{border-color:#22d3ee66;background:#22d3ee24}.settings-btn.secondary:hover{border-color:var(--text-muted)}.settings-btn.primary:hover{border-color:#22d3eecc;box-shadow:var(--accent-glow)}.settings-btn:disabled{opacity:.6;cursor:not-allowed}.math-workspace{display:grid;grid-template-columns:260px 1fr 300px;height:calc(100vh - 60px);gap:1px;background:var(--border-subtle)}.math-workspace.sidebar-collapsed{grid-template-columns:64px 1fr 300px}.workspace-sidebar{background:var(--bg-primary);overflow-y:auto;position:relative;transition:width var(--transition-base);padding:var(--space-md)}.workspace-sidebar.closed{width:64px;min-width:64px;padding:var(--space-sm);overflow:hidden}.workspace-sidebar.open{width:260px;min-width:260px}.sidebar-toggle{position:absolute;top:var(--space-md);right:var(--space-sm);background:var(--bg-card);border:var(--glass-border);color:var(--text-secondary);width:28px;height:28px;border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.75rem;z-index:2;transition:all var(--transition-fast)}.sidebar-toggle:hover{background:var(--bg-hover);color:var(--accent-primary)}.workspace-sidebar-right{background:var(--bg-primary);overflow-y:auto;padding:var(--space-md);min-width:320px}.side-rail{display:grid;gap:12px}.side-rail-card{border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:12px;background:var(--bg-card)}.side-rail-card h4{font-size:.9rem;margin-bottom:8px}.side-rail-row{display:flex;align-items:center;justify-content:space-between;font-size:.85rem;color:var(--text-secondary);margin-bottom:6px}.side-rail-btn{width:100%;text-align:left;margin-bottom:8px;padding:10px 12px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);cursor:pointer}.side-rail-btn:hover{border-color:var(--border-accent);background:var(--bg-hover)}.side-rail-input{width:100%;padding:10px 12px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);margin-bottom:8px}.side-rail-input:focus{outline:none;border-color:var(--border-accent);box-shadow:0 0 0 3px #22d3ee14}.side-rail-actions,.side-rail-topics{display:grid;gap:8px}.side-rail-topic{width:100%;display:flex;align-items:center;justify-content:space-between;padding:9px 10px;border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:var(--bg-card);color:var(--text-primary);cursor:pointer}.side-rail-topic:hover{border-color:var(--border-accent);background:var(--bg-hover)}.side-rail-empty{font-size:.82rem;color:var(--text-muted)}.focus-timer{font-size:2rem;font-weight:800;letter-spacing:.06em;text-align:center;margin:8px 0 10px;color:var(--text-accent);text-shadow:0 0 18px rgba(34,211,238,.35)}.focus-presets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-bottom:10px}.focus-preset-btn{border-radius:var(--radius-md);border:1px solid 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10px;cursor:pointer;font-size:.78rem;font-weight:700}.focus-custom-btn.active{color:var(--text-primary);border-color:#22d3eecc;background:#22d3ee24}.focus-custom-btn:hover{border-color:var(--border-accent);color:var(--text-primary)}.focus-actions{display:grid;gap:8px}.momentum-row{display:flex;align-items:center;justify-content:space-between;font-size:.84rem;color:var(--text-secondary);margin-bottom:8px}.momentum-bar{height:8px;border-radius:var(--radius-full);background:#0f1729a6;border:1px solid var(--border-subtle);overflow:hidden;margin-bottom:8px}.momentum-fill{height:100%;background:linear-gradient(90deg,#10b981,#06b6d4,#f59e0b);border-radius:inherit;transition:width .4s ease}.sidebar-nav{margin-top:44px;display:flex;flex-direction:column;gap:var(--space-sm)}.sidebar-nav-items{display:flex;flex-direction:column;gap:var(--space-xs)}.sidebar-nav-item{width:100%;display:flex;align-items:center;gap:var(--space-sm);padding:10px 12px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);text-align:left}.sidebar-nav-item:hover{background:var(--bg-hover);border-color:var(--border-accent)}.sidebar-nav-item.active{background:#22d3ee1a;border-color:#22d3ee59;box-shadow:0 0 0 3px #22d3ee14}.sidebar-nav-icon{width:24px;display:inline-flex;align-items:center;justify-content:center;font-size:1.05rem}.sidebar-nav-label{font-size:.9rem;font-weight:600}.sidebar-nav.collapsed .sidebar-nav-item{justify-content:center;padding:10px 0}.chat-sessions{margin-top:var(--space-md);padding-top:var(--space-md);border-top:1px solid var(--border-subtle)}.chat-sessions-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-sm)}.chat-sessions-title{font-weight:800;font-size:.9rem}.chat-sessions-new{width:28px;height:28px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);cursor:pointer}.chat-sessions-new:hover{border-color:var(--border-accent);background:var(--bg-hover)}.chat-sessions-list{display:grid;gap:6px}.chat-sessions-empty{color:var(--text-muted);font-size:.85rem;padding:6px 0}.chat-session{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:6px;min-width:0}.chat-session-edit{display:grid;grid-template-columns:1fr auto;gap:6px;align-items:center}.chat-session-input{flex:1;min-width:0;width:100%;padding:8px 10px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);outline:none}.chat-session-btn{min-width:0;display:flex;align-items:center;gap:8px;width:auto;padding:8px 10px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);cursor:pointer;text-align:left}.chat-session.active .chat-session-btn{border-color:var(--border-accent);background:var(--bg-hover)}.chat-session-actions{display:inline-flex;align-items:center;gap:6px;flex-shrink:0}.chat-session-dot{color:var(--text-muted);font-size:.65rem}.chat-session-text{font-size:.85rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-session-btn-icon{width:28px;height:28px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);cursor:pointer}.chat-session-btn-icon:hover{border-color:var(--border-accent);background:var(--bg-hover)}.chat-session-save{border-color:#22c55e59;background:#22c55e1f}.chat-session-save:hover{background:#22c55e2e}.chat-session-del{width:28px;height:28px;border-radius:var(--radius-sm);border:1px solid rgba(239,68,68,.35);background:#ef444414;color:var(--text-primary);cursor:pointer}.chat-session-del:hover{background:#ef444424}.topic-map{padding:var(--space-lg) var(--space-xl);overflow-y:auto;flex:1}.topic-map-header h3{font-size:1.1rem;margin-bottom:var(--space-xs)}.topic-map-subtitle{color:var(--text-muted);font-size:.85rem;margin-bottom:var(--space-md)}.topic-map-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:var(--space-sm);margin-bottom:var(--space-lg)}.topic-map-canvas{border-radius:var(--radius-xl);border:1px solid var(--border-subtle);background:var(--bg-card);padding:var(--space-md);overflow:auto;min-height:min(72vh,840px);margin-bottom:var(--space-lg);display:flex;justify-content:flex-start}.topic-map-canvas svg{max-width:none;height:auto;object-fit:contain}.topic-map-svg{display:block}.topic-map-link{fill:none;stroke:#94a3b859;stroke-width:2}.topic-map-link.active{stroke:#22d3eebf;stroke-width:2.5}.topic-map-link.dim{opacity:.25}.topic-map-arrow{fill:#94a3b8a6}.topic-map-link.active+.topic-map-arrow{fill:#22d3eed9}.topic-map-nodeg{cursor:pointer}.topic-map-nodeg.dim{opacity:.25}.topic-map-rect{fill:#0f172980;stroke:#3341558c;stroke-width:1}:root[data-theme=light] .topic-map-rect{fill:#ffffffeb;stroke:#94a3b8a6}.topic-map-nodeg.in-path .topic-map-rect{stroke:#a855f7a6}.topic-map-nodeg.selected .topic-map-rect{stroke:#22d3eee6;stroke-width:2;filter:drop-shadow(0 8px 20px rgba(34,211,238,.18))}.topic-map-badge{fill:#22d3ee2e;stroke:#22d3ee40}.topic-map-badge-text{fill:var(--text-primary);font-weight:900;font-size:12px}.topic-map-title{fill:var(--text-primary);font-weight:800;font-size:13px}.topic-map-meta{fill:var(--text-muted);font-weight:600;font-size:11px}.topic-map-node{display:flex;gap:var(--space-sm);padding:12px;border-radius:var(--radius-lg);border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);text-align:left}.topic-map-node:hover{background:var(--bg-hover);border-color:var(--border-accent)}.topic-map-node.selected{border-color:#a855f773;box-shadow:0 0 0 3px #a855f71a}.topic-map-node-badge{width:42px;height:42px;border-radius:var(--radius-md);background:var(--accent-gradient);display:flex;align-items:center;justify-content:center;font-weight:800;color:#061018}.topic-map-node-label{font-weight:700}.topic-map-node-meta{font-size:.8rem;color:var(--text-muted)}.topic-map-detail{border-radius:var(--radius-xl);border:1px solid var(--border-subtle);background:var(--bg-card);padding:var(--space-lg)}.topic-map-detail-row{display:flex;flex-wrap:wrap;gap:var(--space-sm);margin:var(--space-sm) 0 var(--space-md)}.pill{padding:6px 10px;border-radius:var(--radius-full);border:1px solid var(--border-subtle);color:var(--text-secondary);background:#151d3359;font-size:.8rem}.topic-map-detail-text{color:var(--text-secondary);font-size:.9rem;margin-top:var(--space-sm)}.topic-map-mini{margin-top:var(--space-md);display:grid;gap:8px}.topic-map-edge{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;padding:10px 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var(--space-md);color:var(--text-muted)}.dashboard-icon{font-size:2.5rem;margin-bottom:var(--space-md);opacity:.5}.score-circle-container{position:relative;width:120px;height:120px;margin:var(--space-md) auto}.score-circle{width:100%;height:100%;transform:rotate(-90deg)}.score-bg{fill:none;stroke:var(--bg-deep);stroke-width:8}.score-fill{fill:none;stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset 1s ease}.score-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.score-number{font-size:1.5rem;font-weight:800}.score-label{font-size:.75rem;color:var(--text-muted)}.score-grade{font-size:.85rem;font-weight:700;color:var(--accent-primary)}.step-results{margin-top:var(--space-lg)}.step-results h4{font-size:.85rem;font-weight:600;margin-bottom:var(--space-md);color:var(--text-secondary)}.step-result-item{padding:var(--space-sm) var(--space-md);margin-bottom:var(--space-sm);border-left:3px 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0;font-size:.8rem}.history-topic{color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-score{color:var(--text-muted);font-family:var(--font-mono)}.history-bar{height:4px;background:var(--bg-deep);border-radius:var(--radius-full);overflow:hidden}.history-fill{height:100%;border-radius:var(--radius-full);transition:width var(--transition-slow)}.graph-panel{position:relative;padding:var(--space-md);border-top:var(--glass-border)}.graph-close{position:absolute;top:var(--space-sm);right:var(--space-sm);width:28px;height:28px;background:var(--bg-card);border:var(--glass-border);border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center}.graph-plotter{background:var(--bg-card);border:var(--glass-border);border-radius:var(--radius-md);overflow:hidden}.graph-header{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);border-bottom:var(--glass-border);font-size:.85rem}.graph-equation{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-family:var(--font-mono);color:var(--accent-primary)}.graph-action-btn{border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-secondary);border-radius:var(--radius-sm);padding:4px 8px;font-size:.75rem;cursor:pointer;transition:all var(--transition-fast)}.graph-action-btn:hover{border-color:var(--border-accent);color:var(--text-primary)}.graph-canvas-container{height:250px;padding:var(--space-sm)}.graph-controls{padding:10px var(--space-md) 6px;border-bottom:var(--glass-border);background:#02061738}.graph-input-label{display:block;font-size:.74rem;color:var(--text-muted);margin-bottom:6px;letter-spacing:.04em;text-transform:uppercase}.graph-input-row{display:flex;gap:8px;align-items:center}.graph-input{flex:1;min-width:0;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font-mono);font-size:.84rem;padding:8px 10px;outline:none}.graph-input:focus{border-color:var(--border-accent);box-shadow:0 0 0 2px #22d3ee24}.graph-action-apply{background:#22d3ee1f;border-color:#22d3ee66;color:var(--text-primary);font-weight:700}.graph-presets{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.graph-preset-btn{border:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-secondary);border-radius:var(--radius-full);padding:4px 10px;font-size:.76rem;font-family:var(--font-mono);cursor:pointer;transition:all var(--transition-fast)}.graph-preset-btn:hover{border-color:var(--border-accent);color:var(--text-primary);transform:translateY(-1px)}.graph-help{padding:0 var(--space-md) var(--space-sm);color:var(--text-muted);font-size:.78rem}.graph-error{height:100%;display:flex;align-items:center;justify-content:center;text-align:center;color:var(--warning);border:1px dashed rgba(245,158,11,.4);border-radius:var(--radius-sm);background:#f59e0b14;padding:var(--space-md)}:root[data-theme=light] .solution-step-box{background:#f1f5f9f2;border:1px solid rgba(148,163,184,.45);border-left:3px solid rgba(14,116,144,.65)}:root[data-theme=light] .graph-controls{background:#f8fafce6}.image-upload{border-radius:var(--radius-md);overflow:hidden}.dropzone{padding:var(--space-xl);border:2px dashed var(--border-subtle);border-radius:var(--radius-md);text-align:center;cursor:pointer;transition:all var(--transition-base)}.image-upload.drag-active .dropzone{border-color:var(--accent-primary);background:#00d4ff0d}.upload-icon{font-size:2rem;display:block;margin-bottom:var(--space-sm)}.upload-title{font-weight:600;margin-bottom:var(--space-xs)}.upload-subtitle{font-size:.8rem;color:var(--text-muted)}.preview-container{position:relative}.preview-image{max-width:100%;max-height:200px;border-radius:var(--radius-sm)}.processing-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#0009;border-radius:var(--radius-sm);gap:var(--space-sm);color:var(--text-primary);font-size:.85rem}.spinner{width:32px;height:32px;border:3px solid var(--border-subtle);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes 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#22d3ee26}.student-report-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:100;padding:var(--space-lg);animation:fadeIn .3s ease}.student-report{background:var(--bg-primary);border:var(--glass-border);border-radius:var(--radius-xl);max-width:800px;width:100%;max-height:90vh;overflow-y:auto;padding:var(--space-xl);box-shadow:var(--shadow-lg)}.report-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-xl)}.report-header h2{font-size:1.25rem;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.report-close{width:36px;height:36px;border-radius:var(--radius-sm);border:var(--glass-border);background:var(--bg-card);color:var(--text-muted);cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast)}.report-close:hover{color:var(--error);border-color:var(--error)}.report-section{margin-bottom:var(--space-xl);padding-bottom:var(--space-xl);border-bottom:1px solid var(--border-subtle)}.report-section h3{font-size:1rem;font-weight:600;margin-bottom:var(--space-md)}.student-info-section{display:flex;align-items:center;gap:var(--space-lg)}.student-avatar-large{font-size:2.5rem;width:64px;height:64px;background:var(--accent-gradient);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center}.xp-total{color:var(--warning);font-weight:600}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-md)}.stat-card{display:flex;flex-direction:column;align-items:center;padding:var(--space-md);background:var(--bg-card);border:var(--glass-border);border-radius:var(--radius-md)}.stat-value{font-size:1.5rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-label{font-size:.75rem;color:var(--text-muted);text-align:center}.mastery-heatmap{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:var(--space-sm);margin-bottom:var(--space-md)}.heatmap-cell{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-sm);display:flex;flex-direction:column;gap:2px;transition:transform var(--transition-fast)}.heatmap-cell:hover{transform:scale(1.05)}.heatmap-label{font-size:.75rem;font-weight:600;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.3)}.heatmap-status{font-size:.65rem;color:#ffffffb3}.heatmap-legend{display:flex;flex-wrap:wrap;gap:var(--space-md);font-size:.7rem;color:var(--text-muted)}.legend-item{display:flex;align-items:center;gap:var(--space-xs)}.legend-color{width:12px;height:12px;border-radius:3px}.forensic-narrative{font-size:.9rem;line-height:1.7;color:var(--text-secondary);margin-bottom:var(--space-md)}.forensic-strong,.forensic-weak{font-size:.85rem;margin-bottom:var(--space-xs)}.report-actions{display:flex;justify-content:center;padding-top:var(--space-md)}.btn-print{padding:var(--space-sm) var(--space-xl);background:var(--accent-gradient);border:none;border-radius:var(--radius-md);color:#fff;font-weight:600;font-size:.9rem;cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-sans)}.btn-print:hover{transform:scale(1.03);box-shadow:var(--accent-glow)}@media print{body{background:#fff;color:#000}.app-header,.workspace-sidebar,.workspace-sidebar-right,.workspace-topbar,.chat-assistant,.report-close,.report-actions,.btn-print{display:none!important}.student-report-overlay{position:static;background:#fff;padding:0}.student-report{max-height:none;box-shadow:none;border:none}.stat-value,.report-header h2{-webkit-text-fill-color:#0f1729;color:#0f1729}}.quiz-result-complete{padding:var(--space-xl);animation:slideUp .4s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.quiz-result-complete h3{font-size:1.4rem;margin-bottom:var(--space-lg);color:var(--accent-primary)}.result-scores{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--space-md);margin-bottom:var(--space-lg)}.score-box{padding:var(--space-md);border-radius:var(--radius-lg);border:1px solid var(--border-subtle);background:#0f172940;text-align:center}.score-box.high{border-color:#22d3ee80;background:#22d3ee1a}.score-label{font-size:.85rem;color:var(--text-secondary);margin-bottom:4px}.score-value{font-size:1.8rem;font-weight:800;color:var(--accent-primary)}.score-percentage{font-size:.9rem;color:var(--text-secondary);margin-top:2px}.solve-details{margin-top:var(--space-xl);padding-top:var(--space-lg);border-top:1px solid var(--border-subtle)}.solve-details h4{margin-bottom:var(--space-md)}.solve-detail-item{margin-bottom:var(--space-md);padding:var(--space-md);border-radius:var(--radius-lg);border-left:4px solid var(--border-subtle);background:#0f17292e}.solve-detail-item.correct{border-left-color:#10b98180;background:#10b98114}.solve-detail-item.incorrect{border-left-color:#ef444480;background:#ef444414}.solve-detail-item.pending{border-left-color:#f59e0b8c;background:#f59e0b1a}.detail-header{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-sm)}.detail-num{font-weight:800;color:var(--accent-primary);min-width:30px}.status-badge{padding:4px 8px;border-radius:var(--radius-md);font-size:.8rem;font-weight:700}.status-badge.correct{background:#10b98133;color:#86efac}.status-badge.incorrect{background:#ef444433;color:#fca5a5}.status-badge.pending{background:#f59e0b40;color:#fcd34d}.difficulty-badge{padding:4px 8px;border-radius:var(--radius-md);font-size:.75rem;font-weight:700;background:#22d3ee26;color:#22d3eecc;text-transform:uppercase}.pill.difficulty{background:#22d3ee26;color:#22d3eecc}.detail-question,.detail-answer,.detail-expected{margin:var(--space-sm) 0;font-size:.95rem}.detail-feedback{margin:var(--space-sm) 0;padding:10px 12px;border-radius:var(--radius-md);border:1px solid rgba(34,211,238,.2);background:#22d3ee12}.detail-student-work{margin:var(--space-sm) 0;padding:10px 12px;border-radius:var(--radius-md);border:1px dashed rgba(34,211,238,.35);background:#0f172938}.detail-student-work strong{display:block;color:var(--text-secondary);margin-bottom:6px;font-size:.85rem}.detail-student-work-body{color:var(--text-primary);line-height:1.5}.detail-feedback-line{margin:4px 0;font-size:.9rem}.detail-question strong,.detail-answer strong,.detail-expected strong{display:block;color:var(--text-secondary);margin-bottom:4px;font-size:.85rem}.solve-question-container{padding:var(--space-md);border-radius:var(--radius-lg);background:#22d3ee0d;border:1px solid rgba(34,211,238,.2)}.solve-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-sm);margin-bottom:var(--space-md)}.solve-nav{display:flex;align-items:center;justify-content:center;gap:var(--space-md);margin-top:var(--space-lg);padding:var(--space-md);border-top:1px solid var(--border-subtle)}.solve-nav .panel-btn:disabled{opacity:.55}.nav-indicator{font-size:.9rem;color:var(--text-secondary);min-width:150px;text-align:center}.quiz-proof-section{margin-top:var(--space-md);padding:var(--space-md);background:#0f172926;border-radius:var(--radius-md)}.proof-label{display:block;margin-bottom:var(--space-sm);font-weight:600;color:var(--text-primary)}.panel-btn.small{padding:6px 10px;font-size:.85rem;height:auto}.mistake-actions{display:flex;gap:var(--space-sm)}.mistake-main{flex:1}@media (max-width: 1024px){.math-workspace{grid-template-columns:1fr;grid-template-rows:1fr}.workspace-sidebar,.workspace-sidebar-right{display:none}.stats-grid{grid-template-columns:repeat(2,1fr)}.workflow-strip{max-width:100%}.workflow-status{width:100%;margin-left:0}.coach-nudge{flex-wrap:wrap}}@media (max-width: 680px){.app-header{padding:10px 12px}.app-logo h1{font-size:1rem}.chat-header{padding:10px 12px}.quick-actions{grid-template-columns:1fr}.workflow-pill{font-size:.7rem;padding:6px 8px}}