@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap");:root{--teal:#14b8a6;--teal-dark:#0d9488;--teal-light:#ccfbf1;--teal-bg:#f0fdfa;--sidebar-w:72px;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;--card-shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);--radius:12px}*{box-sizing:border-box;margin:0;padding:0}body.app-shell{display:flex;position:fixed;top:0;left:0;right:0;bottom:0}.page-shell,body.app-shell,html.app-shell{overflow:hidden}.page-shell{display:flex;position:fixed;top:0;left:0;right:0;bottom:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f8fafc;color:var(--text)}.sidebar{width:var(--sidebar-w);background:#fff;border-right:1px solid var(--border);flex-direction:column;padding:12px 0;gap:4px;flex-shrink:0;z-index:50}.sidebar,.sidebar-logo{display:flex;align-items:center}.sidebar-logo{width:40px;height:40px;margin-bottom:12px;justify-content:center}.sidebar-logo img{width:36px;height:36px;object-fit:contain}.nav-icon{width:44px;height:44px;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;gap:2px;color:var(--muted);font-size:18px;transition:all .15s;border:none;background:none}.nav-icon:hover{background:#f1f5f9;color:var(--text)}.nav-icon.active{background:var(--teal-light);color:var(--teal)}.nav-icon span.label{font-size:9px;font-weight:600;letter-spacing:.02em}.sidebar-bottom{margin-top:auto;display:flex;flex-direction:column;gap:4px;align-items:center}.main-area{min-width:0;overflow:hidden}#view-browse,.main-area{flex:1 1;min-height:0;display:flex;flex-direction:column}#view-browse{overflow-y:auto;overflow-x:hidden}#view-browse::-webkit-scrollbar{width:5px}#view-browse::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.browse-hero{background:linear-gradient(135deg,var(--teal) 0,var(--teal-dark) 100%);padding:32px 40px 28px;color:#fff;position:relative;overflow:hidden}.browse-hero:after{content:"";position:absolute;right:-20px;top:-20px;width:200px;height:200px;background:hsla(0,0%,100%,.06);border-radius:50%}.browse-hero h1{font-size:28px;font-weight:800;margin-bottom:6px}.browse-hero p{opacity:.85;font-size:14px}.browse-hero-row{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:12px}.ask-gali-hero{background:hsla(0,0%,100%,.15);border:1.5px solid hsla(0,0%,100%,.35);color:#fff;padding:8px 18px;border-radius:24px;font-size:13px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:background .15s}.ask-gali-hero:hover{background:hsla(0,0%,100%,.25)}.filter-bar{padding:16px 40px;border-bottom:1px solid var(--border);gap:8px;flex-wrap:wrap;position:-webkit-sticky;position:sticky;top:0;z-index:10}.filter-bar,.filter-btn{background:#fff;display:flex;align-items:center}.filter-btn{padding:7px 18px;border-radius:24px;font-size:13px;font-weight:600;border:1.5px solid var(--border);color:var(--muted);cursor:pointer;transition:all .15s;gap:6px;white-space:nowrap;flex-shrink:0}.filter-btn:hover{border-color:var(--teal);color:var(--teal)}.filter-btn.active{background:var(--teal);color:#fff;border-color:var(--teal)}.filter-count{font-size:11px;opacity:.75}.filter-divider{width:1px;height:24px;background:var(--border);margin:0 4px}.more-filters-btn{margin-left:auto;padding:7px 16px;border-radius:24px;font-size:13px;font-weight:600;border:1.5px solid var(--border);background:#fff;color:var(--muted);cursor:pointer}.browse-content{padding:24px 40px 40px}.browse-section{margin-bottom:36px}.browse-section-header{margin-bottom:16px}.browse-section-header h2{font-size:20px}.browse-section-nav{display:flex;align-items:center;gap:8px}.browse-all-btn{padding:5px 14px;border-radius:20px;font-size:13px;font-weight:600;border:1.5px solid var(--border);background:#fff;color:var(--teal);cursor:pointer;transition:all .15s}.browse-all-btn:hover{background:var(--teal-light)}.scroll-btn{width:32px;height:32px;border-radius:50%;border:1.5px solid var(--border);background:#fff;font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}.scroll-btn:hover{background:var(--teal);color:#fff;border-color:var(--teal)}.cards-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(200px,100%),1fr));grid-gap:16px;gap:16px;max-width:100%}.exp-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);cursor:pointer;transition:transform .18s,box-shadow .18s;overflow:hidden;display:flex;flex-direction:column}.exp-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.1)}.card-icon-wrap{padding:28px 0;display:flex;align-items:center;justify-content:center}.card-icon{font-size:48px;line-height:1}.card-body{padding:12px 16px 16px}.card-section{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}.card-title{font-size:15px;font-weight:700;color:var(--text);margin-bottom:6px;line-height:1.3}.card-desc{font-size:12px;color:var(--muted);line-height:1.5}#view-experiment{overflow:hidden;display:none}#view-experiment,.exp-view{flex:1 1;flex-direction:column;min-height:0}.exp-view{display:flex;min-width:0}.exp-teal-header{padding:20px 32px 0;color:#fff;flex-shrink:0;overflow:hidden}.exp-header-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.back-btn{background:hsla(0,0%,100%,.15);border:1.5px solid hsla(0,0%,100%,.3);color:#fff;padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;cursor:pointer;transition:background .15s}.back-btn:hover{background:hsla(0,0%,100%,.25)}.ask-gali-btn{border:1.5px solid hsla(0,0%,100%,.35);padding:7px 18px;border-radius:24px;display:flex;align-items:center;gap:6px;transition:background .15s}.ask-gali-btn:hover{background:hsla(0,0%,100%,.28)}.exp-h1{font-size:26px;font-weight:800;margin-bottom:4px}.exp-subtitle{font-size:13px;opacity:.85;margin-bottom:10px}.exp-badges{gap:8px;margin-bottom:14px}.exp-badge{background:hsla(0,0%,100%,.18);padding:4px 12px;font-size:11px}.main-tabs{display:flex;gap:2px;border-bottom:none;flex-wrap:wrap;overflow:hidden}.main-tab{padding:10px 20px;border:none;background:hsla(0,0%,100%,.1);color:hsla(0,0%,100%,.75);font-size:13px;font-weight:600;border-radius:10px 10px 0 0;cursor:pointer;transition:all .15s;display:flex;align-items:center;gap:6px}.main-tab:hover{background:hsla(0,0%,100%,.2);color:#fff}.main-tab.active{background:#fff;color:var(--teal)}.exp-body{overflow:hidden;background:#f8fafc}.exp-body,.exp-main-col{flex:1 1;min-height:0;display:flex}.exp-main-col{min-width:0;overflow-y:auto;overflow-x:hidden;padding:24px;flex-direction:column;gap:16px}.exp-main-col::-webkit-scrollbar{width:5px}.exp-main-col::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.tab-pane{display:none}.tab-pane.active{display:block}.content-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);padding:24px;box-shadow:var(--card-shadow)}.content-card h3{font-size:16px;font-weight:700;color:var(--text);margin-bottom:10px;margin-top:18px}.content-card h3:first-child{margin-top:0}.content-card h4.section-subhead{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin:14px 0 6px;border-bottom:1px solid var(--border);padding-bottom:4px}.content-card p{font-size:14px;color:#475569;line-height:1.7;margin-bottom:10px}.content-card ol,.content-card ul{margin-left:20px;margin-bottom:10px}.content-card li{font-size:14px;color:#475569;line-height:1.7;margin-bottom:4px}.concept-list li{font-size:14px;color:#1e293b;line-height:1.7;margin-bottom:6px;padding-left:4px}.clean-eq-list li{font-size:14px;color:#1e293b;line-height:1.8}.content-card li.num{list-style:decimal}.empty{font-style:italic;font-size:13px}.empty,.hint-text{color:var(--muted)}.hint-text{font-size:12px;margin-bottom:8px}.formula-box{background:var(--teal-bg);border:1px solid var(--teal-light);border-radius:8px;padding:10px 16px;margin:12px 0;display:flex;align-items:center;gap:10px}.formula-box .fl{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--teal);flex-shrink:0}.formula-box code{font-family:Courier New,monospace;font-size:14px;font-weight:600;color:var(--text)}.right-panel{width:340px;background:#fff;border-left:1px solid var(--border);flex-direction:column;overflow:hidden}.right-panel,.rp-tabs{flex-shrink:0;display:flex}.rp-tabs{border-bottom:1px solid var(--border)}.rp-tab{flex:1 1;padding:12px;font-size:13px;font-weight:600;background:none;color:var(--muted);cursor:pointer;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all .14s}.rp-tab:hover{color:var(--text)}.rp-tab.active{color:var(--teal);border-bottom-color:var(--teal)}.rp-pane{display:none;flex:1 1;overflow-y:auto;overflow-x:hidden;padding:16px;min-height:0}.rp-pane::-webkit-scrollbar{width:4px}.rp-pane::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.rp-pane.active{display:block}.rp-section h4{font-size:13px;font-weight:700;color:var(--text);margin-bottom:10px}.eq-grid{grid-template-columns:1fr 1fr;grid-gap:10px;gap:10px}.eq-item{border:1px solid var(--border);padding:10px}.eq-emoji{font-size:28px}.eq-name{line-height:1.3}.cb-label{width:130px}.cb-bar-wrap{height:8px;background:#f1f5f9;border-radius:4px}.cb-bar{border-radius:4px;transition:width .4s ease}.cb-pct{width:30px}.misc-list{gap:8px}.misconception{font-size:12px;border-radius:6px}.misconception.wrong{background:#fef2f2;color:#991b1b;border-left:3px solid #ef4444}.hook-box{border-left:4px solid var(--teal)}.khan-link{background:#fff7ed;border:1px solid #fed7aa;color:#c2410c;font-size:12px;font-weight:600;transition:all .15s;cursor:pointer}.khan-link:hover{background:#ffedd5;border-color:#fb923c;color:#9a3412;transform:translateX(2px)}.khan-link:active{background:#fed7aa}.khan-icon{font-size:10px;flex-shrink:0;color:#f97316}.khan-title{line-height:1.3}.khan-note{font-size:11px;color:#9ca3af;margin:4px 0 0;text-align:center}.rp-pane#rpp-chat-placeholder{padding:0}.chat-messages{flex:1 1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;min-height:0;max-height:320px}.chat-messages::-webkit-scrollbar{width:3px}.chat-messages::-webkit-scrollbar-thumb{background:var(--border)}.chat-msg{display:flex;gap:8px;align-items:flex-start}.chat-msg.user{flex-direction:row-reverse}.gali-avatar{font-size:12px}.chat-bubble{max-width:85%;padding:10px 14px;border-radius:12px;font-size:13px;line-height:1.6}.gali-bubble{background:#f8fafc;border:1px solid var(--border);color:var(--text)}.user-bubble{background:var(--teal);color:#fff;border-radius:12px 12px 2px 12px}.gali-bubble ul{margin-left:16px;margin-top:4px}.gali-bubble li{margin-bottom:3px}.gali-bubble ol{margin-left:16px;margin-top:4px}.gali-bubble blockquote{border-left:3px solid var(--teal);padding-left:8px;color:var(--muted);margin:6px 0}.chat-formula{background:var(--teal-bg);padding:6px 10px;border-radius:6px;font-family:monospace;font-size:13px;margin:6px 0;font-weight:600}.chat-quick-btns{padding:8px 12px;display:flex;gap:6px;flex-wrap:wrap;border-top:1px solid var(--border)}.quick-btn{padding:5px 10px;border-radius:20px;font-size:11px;font-weight:600;border:1.5px solid var(--border);background:#fff;color:var(--muted);cursor:pointer;transition:all .14s}.quick-btn:hover{background:var(--teal-light);border-color:var(--teal);color:var(--teal)}.chat-tone-btns{padding:4px 12px;display:flex;gap:5px;flex-wrap:wrap}.tone-btn{padding:4px 10px;border-radius:14px;font-size:11px;font-weight:600;border:1.5px solid var(--border);background:#fff;color:var(--muted);cursor:pointer;transition:all .14s}.tone-btn:hover{background:#f8fafc}.tone-btn.active{background:var(--teal-light);border-color:var(--teal);color:var(--teal)}.chat-input-row{padding:10px 12px;border-top:1px solid var(--border);display:flex;gap:6px}.chat-input{flex:1 1;padding:9px 12px;border-radius:8px;border:1.5px solid var(--border);font-size:13px;outline:none;transition:border .15s}.chat-input:focus{border-color:var(--teal)}.chat-submit{padding:9px 16px;background:var(--teal);color:#fff;border:none;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;transition:background .15s;white-space:nowrap}.chat-submit:hover{background:var(--teal-dark)}.chat-thinking{display:flex;gap:4px;padding:8px 12px;align-items:center}.dot{width:6px;height:6px;border-radius:50%;background:var(--teal);animation:bounce .8s infinite}.dot:nth-child(2){animation-delay:.15s}.dot:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,80%,to{transform:scale(.8);opacity:.6}40%{transform:scale(1.2);opacity:1}}.results-form{display:flex;flex-direction:column;gap:20px}.conclusion-section h4,.obs-section h4,.results-table-wrap h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:10px}.table-scroll{overflow-x:auto}.data-entry-table{border-collapse:collapse;width:100%;font-size:13px}.data-entry-table th{background:#f8fafc;padding:8px 10px;border:1px solid var(--border);font-weight:600;color:var(--muted);font-size:11px;white-space:nowrap}.data-entry-table td{padding:0}.data-entry-table td,.row-num{border:1px solid var(--border)}.row-num{background:#f8fafc;padding:6px 10px;font-size:12px;color:var(--muted);font-weight:600;text-align:center}.data-cell{width:100%;border:none;padding:7px 10px;font-size:13px;outline:none;background:transparent;text-align:center}.data-cell:focus{background:var(--teal-bg)}.data-cell.valid{background:#f0fdf4}.data-cell.invalid{background:#fef2f2}.table-actions{display:flex;gap:8px;margin-top:8px}.obs-field{margin-bottom:12px}.obs-field label{font-size:13px;color:var(--text);margin-bottom:4px;display:block;line-height:1.5}.conclusion-section textarea,.obs-field textarea,.personal-notes,.teacher-notes-input{width:100%;max-width:100%;box-sizing:border-box;border:1.5px solid var(--border);border-radius:8px;padding:10px 12px;font-size:13px;font-family:inherit;outline:none;transition:border .15s;resize:vertical;line-height:1.6}.conclusion-section textarea:focus,.obs-field textarea:focus,.personal-notes:focus,.teacher-notes-input:focus{border-color:var(--teal)}.btn-secondary{padding:7px 16px;border-radius:8px;border:1.5px solid var(--border);background:#fff;color:var(--text);font-size:13px;font-weight:600;cursor:pointer;transition:all .15s}.btn-secondary:hover{background:#f8fafc;border-color:var(--teal);color:var(--teal)}.btn-check-results{width:100%;padding:12px;background:var(--teal);color:#fff;border:none;border-radius:10px;font-size:14px;font-weight:700;cursor:pointer;transition:background .15s;display:flex;align-items:center;justify-content:center;gap:6px}.btn-check-results:hover{background:var(--teal-dark)}.ai-results-feedback{background:var(--teal-bg);border:1px solid var(--teal-light)}.rf-header{padding:8px 14px;font-size:12px;display:flex;align-items:center;gap:6px}.rf-body{padding:12px 14px}.rf-hint{background:rgba(20,184,166,.08);color:var(--teal-dark)}.rf-expected,.rf-hint{padding:8px 14px}.questions-tab{display:flex;flex-direction:column;gap:24px}.q-section h3{font-size:16px;font-weight:700;color:var(--text);margin-bottom:14px}.q-item,.q-open{display:flex;gap:12px;margin-bottom:16px;align-items:flex-start}.q-check-icon{width:20px;height:20px;border-radius:50%;background:var(--teal);color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}.q-content{flex:1 1}.q-text{font-size:14px;color:var(--text);margin-bottom:8px;line-height:1.5}.q-answers{display:flex;flex-direction:column;gap:6px}.q-btn{text-align:left;padding:8px 14px;border-radius:8px;border:1.5px solid var(--border);background:#fff;font-size:13px;color:#475569;cursor:pointer;transition:all .14s}.q-btn:hover:not(:disabled){background:var(--teal-bg);border-color:var(--teal)}.q-btn.correct{background:#dcfce7;border-color:#16a34a;color:#15803d;font-weight:600}.q-btn.wrong{background:#fee2e2;border-color:#ef4444;color:#dc2626}.q-btn:disabled{cursor:default}.q-feedback{font-size:12px;margin-top:6px;padding:6px 10px;border-radius:6px;display:none;line-height:1.5}.q-feedback.show{display:block}.q-feedback.correct{background:#dcfce7;color:#15803d}.q-feedback.wrong{background:#fff7ed;color:#92400e}.q-open textarea{width:100%;border:1.5px solid var(--border);border-radius:8px;padding:8px 12px;font-size:13px;font-family:inherit;outline:none;transition:border .15s;resize:vertical}.q-open textarea:focus{border-color:var(--teal)}.teacher-only{display:none}body.teacher-mode .teacher-only{display:block}.teacher-notes-input{background:#fffbeb}.teacher-mode-bar{display:none;background:#f59e0b;color:#fff;padding:6px 24px;font-size:12px;font-weight:700;text-align:center;letter-spacing:.03em}body.teacher-mode .teacher-mode-bar{display:block}.search-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:100;display:none;align-items:flex-start;justify-content:center;padding-top:80px}.search-overlay.open{display:flex}.search-box{background:#fff;border-radius:16px;width:600px;max-width:95vw;box-shadow:0 20px 60px rgba(0,0,0,.2);overflow:hidden}.search-input-wrap{display:flex;align-items:center;gap:10px;padding:16px 20px;border-bottom:1px solid var(--border)}.search-main-input{flex:1 1;border:none;font-size:16px;color:var(--text);outline:none}.search-close-btn{background:none;border:none;font-size:20px;color:var(--muted);cursor:pointer}.search-results{max-height:400px;overflow-y:auto}.search-item{padding:12px 20px;cursor:pointer;border-bottom:1px solid #f8fafc;display:flex;align-items:center;gap:12px;transition:background .12s}.search-item:hover{background:#f8fafc}.search-item-emoji{font-size:24px;width:36px;text-align:center}.search-item-section{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px}.search-item-title{font-size:14px;font-weight:600;color:var(--text)}.search-item-desc{font-size:12px;color:var(--muted)}.teacher-toggle{position:fixed;bottom:24px;right:24px;z-index:40;background:var(--teal);color:#fff;border:none;border-radius:50%;width:52px;height:52px;font-size:20px;cursor:pointer;box-shadow:0 4px 16px rgba(20,184,166,.4);transition:all .2s}.teacher-toggle:hover{transform:scale(1.08);box-shadow:0 6px 20px rgba(20,184,166,.5)}.toast{position:fixed;bottom:80px;right:24px;background:var(--text);color:#fff;padding:10px 20px;border-radius:10px;font-size:13px;font-weight:600;z-index:200;opacity:0;transition:opacity .3s;pointer-events:none}.toast.show{opacity:1}.mobile-panel-btn{display:none}@media(max-width:900px){.right-panel{display:none}.right-panel.mobile-open{display:flex;position:fixed;bottom:56px;left:0;right:0;height:50vh;width:100%;border-left:none;border-top:1px solid var(--border);box-shadow:0 -4px 20px rgba(0,0,0,.12);z-index:45;background:#fff;flex-direction:column}.mobile-panel-btn{display:flex;align-items:center;gap:6px;position:fixed;bottom:68px;right:16px;z-index:44;background:var(--teal);color:#fff;border:none;border-radius:24px;padding:8px 16px;font-size:13px;font-weight:600;box-shadow:0 4px 14px rgba(20,184,166,.4);cursor:pointer;transition:all .2s}.mobile-panel-btn:hover{background:var(--teal-dark)}.teacher-toggle{bottom:68px;right:80px}.toast{bottom:68px}.gali-modal-overlay{align-items:flex-end;padding:0}.gali-modal{width:100%;max-width:100%;border-radius:20px 20px 0 0;height:85vh;max-height:85vh;animation:slideSheet .25s ease}}@media(max-width:768px){html.app-shell{overflow-x:hidden;overflow-y:auto}body.app-shell{overflow-x:hidden;overflow-y:auto;width:100%;padding-bottom:calc(56px + env(safe-area-inset-bottom,0px))}.page-shell,body.app-shell{position:static;height:auto;min-height:100vh;flex-direction:column}.page-shell{overflow:visible}.main-area{order:1;width:100%}#view-browse,.main-area{flex:none;overflow:visible}#view-browse{display:flex;flex-direction:column}.exp-view{overflow:visible}.exp-body{flex-direction:column}.exp-body,.exp-main-col{overflow:visible;min-height:unset}.exp-main-col{height:auto;max-height:none;padding:14px 12px 32px;gap:14px}.sidebar{order:2;width:100%;height:calc(56px + env(safe-area-inset-bottom,0px));flex-direction:row;border-right:none;border-top:1px solid var(--border);padding:0 8px env(safe-area-inset-bottom,0);position:fixed;bottom:0;left:0;right:0;z-index:50;gap:0;background:#fff}.sidebar-logo{display:none}.sidebar-bottom{margin-top:0;margin-left:auto;flex-direction:row;gap:0}.nav-icon{flex:1 1;width:auto;height:56px;border-radius:0;gap:3px;font-size:20px;padding:6px 0}.nav-icon span.label{font-size:9px}.signout-btn{flex:1 1;height:56px;border-radius:0;font-size:20px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;background:none;border:none;color:var(--muted);cursor:pointer}.signout-btn:after{content:"Exit";font-size:9px;font-weight:600;letter-spacing:.02em}.browse-hero{padding:calc(20px + env(safe-area-inset-top,0px)) 16px 20px}.browse-hero h1{font-size:22px;margin-bottom:4px}.browse-hero p{font-size:13px}.browse-hero-row{gap:8px}.ask-gali-hero{padding:7px 14px;font-size:12px}.filter-bar{padding:10px 12px;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;gap:6px;scrollbar-width:none;position:-webkit-sticky;position:sticky;top:0;z-index:10}.filter-bar::-webkit-scrollbar{display:none}.filter-divider,.more-filters-btn{display:none}.browse-content{padding:14px 12px 24px}.browse-section{margin-bottom:28px}.browse-section-header h2{font-size:17px}.cards-row{grid-template-columns:repeat(2,1fr);gap:10px}.card-icon{font-size:38px}.card-icon-wrap{padding:18px 0}.card-body{padding:10px 12px 14px}.card-title{font-size:13px}.card-desc{font-size:11px}.exp-teal-header{padding:calc(12px + env(safe-area-inset-top,0px)) 14px 0}.exp-header-top{margin-bottom:10px}.back-btn{font-size:12px;padding:5px 10px}.ask-gali-btn{font-size:12px;padding:6px 12px}.exp-h1{font-size:20px;margin-bottom:4px}.exp-subtitle{font-size:12px;margin-bottom:8px}.exp-badges{gap:6px;margin-bottom:10px;flex-wrap:wrap}.exp-badge{font-size:10px;padding:3px 10px}.main-tabs{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:2px;padding-bottom:0}.main-tabs::-webkit-scrollbar{display:none}.main-tab{padding:9px 14px;font-size:12px;white-space:nowrap;flex-shrink:0;border-radius:8px 8px 0 0}.content-card{padding:16px;margin-bottom:0}.content-card h3{font-size:15px;margin-top:16px}.content-card h3:first-child{margin-top:0}.content-card li,.content-card p{font-size:13px;line-height:1.65}.khan-inline-section{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}.khan-inline-title{font-size:13px;font-weight:700;color:var(--text);margin-bottom:10px;display:flex;align-items:center;gap:6px}.khan-links{gap:8px}.khan-link{font-size:13px;padding:10px 14px}.right-panel.mobile-open{bottom:calc(56px + env(safe-area-inset-bottom,0px))}.mobile-panel-btn{bottom:calc(70px + env(safe-area-inset-bottom,0px));right:12px;padding:7px 14px;font-size:12px}.chat-messages{max-height:calc(40vh - 120px)}.search-overlay{padding-top:16px;align-items:flex-start}.search-box{border-radius:12px;width:calc(100% - 16px);max-width:100%;margin:0 8px}.search-input-wrap{padding:12px 14px}.search-main-input{font-size:15px}.search-results{max-height:60vh}.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}.data-entry-table{min-width:400px}.q-text{font-size:13px}.q-btn{font-size:12px;padding:8px 12px;text-align:left}.teacher-toggle{right:12px;width:44px;height:44px;font-size:18px}.teacher-toggle,.toast{bottom:calc(70px + env(safe-area-inset-bottom,0px))}}@media(max-width:390px){.browse-hero h1{font-size:20px}.exp-h1{font-size:18px}.main-tab{padding:7px 11px;font-size:11px}.cards-row{grid-template-columns:1fr 1fr;gap:10px}.card-icon{font-size:36px}.content-card{padding:12px}}.section-subhead{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:8px}.q-section{margin-bottom:24px}.conclusion-section textarea,.obs-section textarea{width:100%;border:1.5px solid var(--border);border-radius:8px;padding:8px 12px;font-size:13px;font-family:inherit;outline:none;transition:border .15s;resize:vertical;margin-top:4px}.conclusion-section textarea:focus,.obs-section textarea:focus{border-color:var(--teal)}.misconception{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border-radius:8px;margin-bottom:6px;font-size:13px;line-height:1.5}.misconception.wrong{background:#fff7ed;color:#92400e}.mc-icon{font-weight:700;flex-shrink:0}.data-cell.valid{border-color:#16a34a!important;background:#dcfce715}.exp-card{transition:box-shadow .15s,transform .1s}.exp-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.12);transform:translateY(-1px)}.clean-eq-list{list-style:none;padding:0}.personal-notes{width:100%;border:1.5px solid var(--border);border-radius:8px;padding:10px 14px;font-size:14px;font-family:inherit;outline:none;transition:border .15s;resize:vertical;line-height:1.6}.personal-notes:focus{border-color:var(--teal)}.exp-view{overflow:hidden}.data-entry-table tbody tr:nth-child(2n){background:#fafafa}.browse-section{margin-bottom:32px}.browse-section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.browse-section-header h2{font-size:18px;font-weight:700;color:var(--text)}.ai-results-feedback{margin-top:12px;border:1.5px solid var(--teal-light);border-radius:10px;overflow:hidden}.rf-header{background:var(--teal);color:#fff;padding:10px 16px;font-size:13px;font-weight:700}.rf-body{padding:12px 16px;font-size:13px;line-height:1.6;color:var(--text)}.rf-hint{background:var(--teal-bg);color:#0d9488;border-top:1px solid var(--teal-light)}.rf-expected,.rf-hint{padding:8px 16px;font-size:12px}.rf-expected{background:#f8fafc;color:var(--muted);border-top:1px solid var(--border)}.teacher-notes-section{border:2px solid #f59e0b;border-radius:12px;padding:16px;margin-top:16px}.q-check-icon.correct{background:#16a34a}.q-check-icon.wrong{background:#ef4444}.exp-badge{display:inline-flex;align-items:center;gap:4px;background:hsla(0,0%,100%,.2);border:1px solid hsla(0,0%,100%,.3);color:#fff;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600}.exp-badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}.ask-gali-btn{background:hsla(0,0%,100%,.15);border:1.5px solid hsla(0,0%,100%,.4);color:#fff;padding:7px 14px;border-radius:20px;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s}.ask-gali-btn:hover{background:hsla(0,0%,100%,.25)}.rp-section{padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:16px}.rp-section:last-child{border-bottom:none}.hook-box{background:var(--teal-bg);border-left:3px solid var(--teal);border-radius:0 8px 8px 0;padding:10px 14px;font-size:13px;line-height:1.6;color:var(--text)}.khan-links{display:flex;flex-direction:column;gap:6px}.khan-link{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#f8fafc;border-radius:8px;text-decoration:none;font-size:13px;color:var(--text);border:1px solid var(--border);transition:all .14s}.khan-link:hover{background:var(--teal-bg);border-color:var(--teal)}.khan-icon{color:var(--teal);font-size:16px}.khan-title{font-weight:500}.misc-list{display:flex;flex-direction:column;gap:6px}.eq-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));grid-gap:8px;gap:8px}.eq-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px;background:#f8fafc;border-radius:8px;text-align:center}.eq-emoji{font-size:24px}.eq-name{font-size:11px;color:var(--muted);font-weight:500;line-height:1.2}.cb-list{flex-direction:column}.cb-list,.cb-row{display:flex;gap:8px}.cb-row{align-items:center}.cb-label{font-size:12px;color:var(--text);width:140px;flex-shrink:0}.cb-bar-wrap{flex:1 1;height:6px;background:#e2e8f0;border-radius:3px;overflow:hidden}.cb-bar{height:100%;border-radius:3px;transition:width .4s}.cb-pct{font-size:11px;color:var(--muted);width:32px;text-align:right;flex-shrink:0}.gali-modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:300;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .15s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.gali-modal{background:#fff;border-radius:16px;width:520px;max-width:100%;height:600px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 24px 64px rgba(0,0,0,.2);animation:slideUp .2s ease}@keyframes slideUp{0%{transform:translateY(16px);opacity:0}to{transform:translateY(0);opacity:1}}.gali-modal-header{background:linear-gradient(135deg,var(--teal) 0,var(--teal-dark) 100%);padding:14px 16px;gap:10px}.gali-modal-avatar,.gali-modal-header{display:flex;align-items:center;flex-shrink:0}.gali-modal-avatar{width:34px;height:34px;border-radius:50%;background:hsla(0,0%,100%,.22);color:#fff;font-size:14px;font-weight:800;justify-content:center;border:1.5px solid hsla(0,0%,100%,.35)}.gali-modal-header-title{flex:1 1;color:#fff;font-size:15px;font-weight:700;letter-spacing:.01em}.gali-modal-context-badge{background:hsla(0,0%,100%,.18);border:1px solid hsla(0,0%,100%,.32);color:#fff;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:160px}.gali-modal-close{background:none;border:none;color:hsla(0,0%,100%,.75);font-size:18px;cursor:pointer;padding:4px 6px;line-height:1;border-radius:6px;transition:all .15s;flex-shrink:0}.gali-modal-close:hover{color:#fff;background:hsla(0,0%,100%,.15)}.gali-voice-toggle{background:none;border:none;color:hsla(0,0%,100%,.65);font-size:16px;cursor:pointer;padding:4px 6px;line-height:1;border-radius:6px;transition:all .15s;flex-shrink:0}.gali-voice-toggle:hover{color:#fff;background:hsla(0,0%,100%,.15)}.gali-voice-toggle.active{color:#fff;background:hsla(0,0%,100%,.2);border:1px solid hsla(0,0%,100%,.35)}.gali-mic-btn{width:36px;height:36px;border-radius:8px;border:1.5px solid var(--border);background:#fff;font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s;color:var(--muted)}.gali-mic-btn:hover:not(:disabled){border-color:var(--teal);color:var(--teal);background:var(--teal-bg)}.gali-mic-btn:disabled{opacity:.4;cursor:not-allowed}.gali-mic-btn.listening{border-color:#ef4444;color:#ef4444;background:#fef2f2;animation:micPulse 1s ease-in-out infinite}.chat-input.listening-pulse{border-color:#ef4444;animation:inputPulse 1s ease-in-out infinite}@keyframes micPulse{0%,to{box-shadow:0 0 0 0 rgba(239,68,68,.4)}50%{box-shadow:0 0 0 5px rgba(239,68,68,0)}}@keyframes inputPulse{0%,to{border-color:#ef4444}50%{border-color:rgba(239,68,68,.35)}}.gali-modal-notice{padding:8px 14px;background:#fff7ed;border-bottom:1px solid #fed7aa;font-size:12px;color:#92400e;flex-shrink:0}.gali-modal-notice code{background:#fef3c7;padding:1px 5px;border-radius:4px;font-size:11px}.gali-modal-messages{flex:1 1;overflow-y:auto;padding:14px 12px;display:flex;flex-direction:column;gap:10px;min-height:0}.gali-modal-messages::-webkit-scrollbar{width:4px}.gali-modal-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.gali-cursor{display:inline-block;width:2px;height:14px;background:var(--teal);margin-left:2px;vertical-align:middle;animation:blink .8s infinite}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}@keyframes slideSheet{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}.gali-inline-code{background:#f1f5f9;color:#0f172a;padding:2px 6px;border-radius:4px;font-family:ui-monospace,monospace;font-size:12px;font-weight:600}.gali-para{margin:0 0 5px;line-height:1.6}.gali-para:last-child{margin-bottom:0}.gali-list{margin:4px 0 6px 16px;padding:0;line-height:1.6}.gali-list li{margin-bottom:3px}.gali-avatar{width:28px;height:28px;border-radius:50%;background:var(--teal);color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.nav-icon.gali-nav span:first-child{color:var(--teal)}.landing-root{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#f8fafc;padding:40px 20px;position:relative;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,sans-serif}.landing-bg-orb{position:absolute;top:-160px;right:-160px;width:560px;height:560px;background:radial-gradient(circle,rgba(20,184,166,.13) 0,rgba(20,184,166,.04) 55%,transparent 75%);border-radius:50%;pointer-events:none;z-index:0}.landing-card{position:relative;z-index:1;background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:0 8px 40px rgba(0,0,0,.07),0 2px 8px rgba(0,0,0,.04);padding:52px 48px 48px;width:100%;max-width:440px;display:flex;flex-direction:column;align-items:center;gap:0}.landing-logo-wrap{margin-bottom:36px;display:flex;align-items:center;justify-content:center}.landing-logo{height:56px;width:auto;object-fit:contain;display:block}.landing-brand{text-align:center;margin-bottom:40px}.landing-title{font-size:32px;font-weight:800;color:var(--text);letter-spacing:-.02em;line-height:1.1;margin-bottom:10px}.landing-tagline{font-size:15px;color:var(--muted);line-height:1.6;font-weight:400}.landing-signin-btn{width:100%;padding:13px 24px;background:var(--teal);color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;transition:background .15s,transform .1s,box-shadow .15s;display:flex;align-items:center;justify-content:center;gap:8px;letter-spacing:.01em;box-shadow:0 4px 14px rgba(20,184,166,.3)}.landing-signin-btn:hover:not(:disabled){background:var(--teal-dark);transform:translateY(-1px);box-shadow:0 6px 18px rgba(20,184,166,.38)}.landing-signin-btn:active:not(:disabled){transform:translateY(0)}.landing-signin-btn:disabled{opacity:.65;cursor:default}.landing-form{width:100%;gap:14px}.landing-field,.landing-form{display:flex;flex-direction:column}.landing-field{gap:5px}.landing-label{font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.03em;text-transform:uppercase}.landing-input{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;color:var(--text);background:#fff;outline:none;transition:border .15s,box-shadow .15s}.landing-input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(20,184,166,.12)}.landing-input:disabled{background:#f8fafc;color:var(--muted)}.landing-input::placeholder{color:#cbd5e1}.landing-error{font-size:13px;color:#dc2626;background:#fef2f2;border:1px solid #fecaca;border-radius:7px;padding:8px 12px;margin:0;line-height:1.5}.landing-spinner{display:inline-block;width:18px;height:18px;border:2.5px solid hsla(0,0%,100%,.35);border-top-color:#fff;border-radius:50%;animation:landing-spin .65s linear infinite}@keyframes landing-spin{to{transform:rotate(1turn)}}.landing-footer{position:relative;z-index:1;margin-top:32px;font-size:12px;color:#cbd5e1;letter-spacing:.02em}.signout-btn{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);font-size:16px;transition:all .15s;border:none;background:none}.signout-btn:hover{background:#fef2f2;color:#dc2626}.signout-btn title{display:none}@media(max-width:500px){.landing-card{padding:36px 24px 32px}.landing-title{font-size:28px}.landing-logo{height:44px}}.lang-switcher{flex-direction:column;margin-bottom:6px}.lang-btn,.lang-switcher{display:flex;gap:4px;align-items:center}.lang-btn{padding:5px 8px;border-radius:8px;border:1px solid transparent;cursor:pointer;font-size:11px;font-weight:500;line-height:1;background:transparent;color:var(--muted);transition:all .15s;white-space:nowrap;width:44px;justify-content:center}.lang-btn:hover{background:rgba(20,184,166,.12);color:var(--teal)}.lang-btn.active{background:rgba(20,184,166,.18);color:var(--teal);border-color:rgba(20,184,166,.35);font-weight:700}.lang-flag{font-size:13px;line-height:1}.lang-label{font-size:10px;font-weight:700;letter-spacing:.04em}@media(max-width:768px){.lang-switcher{flex-direction:row;margin-bottom:0;gap:2px}.lang-btn{width:36px;padding:4px 6px}}.landing-lang{position:fixed;top:16px;right:20px;z-index:100}.landing-lang .lang-switcher{flex-direction:row;gap:4px;background:hsla(0,0%,100%,.9);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:10px;padding:6px 8px;box-shadow:0 2px 12px rgba(0,0,0,.08)}.landing-lang .lang-btn{color:#475569;width:auto;padding:4px 10px}.landing-lang .lang-btn.active{background:var(--teal);color:#fff;border-color:var(--teal)}