@import"https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700&family=Inter:wght@300;400;500&family=JetBrains+Mono:wght@400;500&display=swap";:root{--bg-primary: #0d0f12;--bg-secondary: #151820;--bg-sidebar: #101318;--bg-hover: #1c2030;--bg-active: #1e2540;--bg-input: #181c28;--bg-bubble-user: #1a3a5c;--bg-bubble-ai: #161b27;--bg-card: #13171f;--border: #232840;--border-light: #2a3050;--accent: #4f8ef7;--accent-hover: #6ba3ff;--accent-dim: rgba(79, 142, 247, .15);--student-color: #22c55e;--staff-color: #f59e0b;--danger: #ef4444;--text-primary: #e8eaf2;--text-secondary: #9aa0bb;--text-muted: #5a6080;--font-display: "Instrument Sans", sans-serif;--font-body: "Inter", sans-serif;--font-mono: "JetBrains Mono", monospace;--sidebar-width: 280px;--chat-edge-padding: clamp(18px, 3.4vw, 72px);--chat-bubble-max: min(980px, calc(100vw - var(--sidebar-width) - 160px));--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 1px 4px rgba(0,0,0,.4);--shadow-md: 0 4px 16px rgba(0,0,0,.5);--shadow-lg: 0 8px 32px rgba(0,0,0,.6)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100%;width:100%}body{font-family:var(--font-body);font-size:14px;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}::selection{background:var(--accent-dim);color:var(--accent-hover)}@keyframes pulse{0%,to{opacity:.45;transform:scale(.85)}50%{opacity:1;transform:scale(1)}}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:99px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.chat-layout{display:flex;min-height:100vh;height:100dvh;width:100%;overflow:hidden;position:relative}.chat-main{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column;overflow:hidden;transition:margin-left .2s ease}.mobile-sidebar-toggle,.mobile-sidebar-backdrop{display:none}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);height:100%;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;transition:all .2s ease}.sidebar-collapsed-panel{width:56px;min-width:56px;align-items:center;padding:12px 8px;gap:8px}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 14px 12px;border-bottom:1px solid var(--border)}.sidebar-brand{display:flex;align-items:center;gap:8px}.sidebar-logo{font-family:var(--font-display);font-size:15px;font-weight:700;color:var(--text-primary);letter-spacing:-.3px}.user-badge{font-size:10px;font-weight:600;padding:2px 8px;border-radius:99px;letter-spacing:.5px;text-transform:uppercase}.user-badge.student{background:#22c55e26;color:var(--student-color)}.user-badge.staff{background:#f59e0b26;color:var(--staff-color)}.new-chat-btn{display:flex;align-items:center;gap:8px;margin:12px 10px 8px;padding:9px 14px;background:var(--accent-dim);color:var(--accent);border:1px solid rgba(79,142,247,.3);border-radius:var(--radius-md);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s}.new-chat-btn:hover{background:#4f8ef740;border-color:var(--accent)}.conversations-list{flex:1;overflow-y:auto;padding:4px 6px}.empty-conversations{padding:24px 12px;text-align:center;color:var(--text-muted);font-size:13px;line-height:1.7}.conversation-item{display:flex;align-items:center;gap:6px;padding:9px 10px;border-radius:var(--radius-sm);cursor:pointer;transition:background .12s;min-height:44px}.conversation-item:hover{background:var(--bg-hover)}.conversation-item.active{background:var(--bg-active)}.conversation-item:hover .conv-actions{opacity:1}.conv-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.conv-title{font-size:13px;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-date{font-size:11px;color:var(--text-muted)}.conv-actions{display:flex;gap:2px;opacity:0;transition:opacity .12s}.conv-edit{display:flex;align-items:center;gap:4px;flex:1}.conv-edit-input{flex:1;background:var(--bg-input);border:1px solid var(--border-light);border-radius:var(--radius-sm);color:var(--text-primary);font-size:12px;padding:4px 8px;outline:none}.sidebar-footer{display:flex;align-items:center;gap:10px;padding:12px 14px;border-top:1px solid var(--border)}.user-info{flex:1;display:flex;align-items:center;gap:10px;min-width:0}.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--accent-dim);border:1px solid rgba(79,142,247,.3);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0}.user-details{min-width:0;display:flex;flex-direction:column;gap:1px}.user-name{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-email{font-size:11px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-window{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-primary)}.messages-container{flex:1;min-height:0;overflow-y:auto;padding:24px 0;display:flex;flex-direction:column;gap:2px;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}.empty-chat{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px var(--chat-edge-padding);text-align:center;gap:16px;animation:fadeIn .4s ease}.empty-chat-icon{width:72px;height:72px;border-radius:50%;background:var(--bg-card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--accent)}.empty-chat-title{font-family:var(--font-display);font-size:24px;font-weight:600;color:var(--text-primary);letter-spacing:-.5px}.empty-chat-subtitle{font-size:14px;color:var(--text-secondary);max-width:min(680px,calc(100vw - var(--sidebar-width) - 160px));line-height:1.7}.empty-chat-suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:8px;max-width:min(920px,calc(100vw - var(--sidebar-width) - 160px))}.suggestion-chip{padding:8px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all .15s;text-align:left}.suggestion-chip:hover:not(:disabled){border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}.suggestion-chip:disabled{opacity:.4;cursor:default}.message-row{display:flex;gap:12px;padding:10px var(--chat-edge-padding);animation:messageIn 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var(--border-light);border-radius:var(--radius-md);background:var(--bg-card)}.generated-file-item.diagram{display:flex;flex-direction:column;gap:8px}.generated-diagram-inline{overflow:auto;max-height:520px;padding:10px;border:1px solid var(--border-light);border-radius:var(--radius-md);background:#fff}.generated-diagram-inline img{display:block;width:100%;max-width:100%;height:auto;min-height:160px;object-fit:contain}.generated-diagram-loading{padding:14px;border:1px solid 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span:nth-child(2){animation-delay:.15s}.typing-indicator span:nth-child(3){animation-delay:.3s}.loading-conversation{display:flex;justify-content:center;padding:16px;color:var(--text-muted);font-size:14px}@keyframes bounce{0%,80%,to{transform:translateY(0);opacity:.5}40%{transform:translateY(-6px);opacity:1}}.cursor-blink{display:inline-block;width:2px;height:16px;background:var(--accent);margin-left:2px;vertical-align:text-bottom;animation:cursorBlink .8s infinite}@keyframes cursorBlink{0%,to{opacity:1}50%{opacity:0}}.input-bar-wrapper{padding:12px var(--chat-edge-padding) 16px;border-top:1px solid var(--border);background:var(--bg-primary);padding-bottom:calc(16px + env(safe-area-inset-bottom,0px))}.tool-controls{display:flex;align-items:center;gap:8px;min-height:30px;position:relative;min-width:0;flex:1}.tool-menu{position:relative;flex-shrink:0}.tool-menu-btn{height:30px;display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-input);color:var(--text-secondary);padding:0 9px;font-size:12px;font-weight:500;cursor:pointer;transition:all .15s}.tool-menu-btn.icon-only{width:30px;justify-content:center;padding:0}.tool-menu-btn:hover:not(:disabled),.tool-menu-btn.active{border-color:var(--accent);color:var(--text-primary)}.tool-status-dot{min-width:16px;height:16px;padding:0 5px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-size:10px;line-height:1;font-weight:700;background:var(--bg-card);color:var(--text-muted);border:1px solid var(--border-light)}.tool-status-dot.on{background:var(--accent-dim);color:var(--accent);border-color:#4f8ef752}.tool-status-dot.off{opacity:.55}.tool-menu-btn:disabled{opacity:.5;cursor:default}.tool-popover{position:absolute;left:0;bottom:calc(100% + 8px);z-index:20;width:min(360px,calc(100vw - 24px));display:flex;flex-direction:column;gap:8px;padding:10px;border:1px solid var(--border-light);border-radius:var(--radius-lg);background:var(--bg-primary);box-shadow:var(--shadow-lg)}.tool-row{display:flex;align-items:center;justify-content:space-between;gap:clamp(12px,1vw,16px)}.tool-row-label{min-width:112px;display:inline-flex;align-items:center;gap:7px;color:var(--text-secondary);font-size:12px;font-weight:500}.tool-segmented{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:186px;padding:2px;border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-input)}.tool-segmented button{min-width:0;height:24px;border:0;border-radius:calc(var(--radius-md) - 2px);background:transparent;color:var(--text-muted);font-size:11px;cursor:pointer}.tool-segmented button.active{background:var(--accent);color:#fff}.tool-summary{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-muted);font-size:11px}.input-bar{display:flex;flex-direction:column;gap:10px;background:var(--bg-input);border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:12px 14px 10px;transition:border-color .15s;position:relative}.input-bar:focus-within{border-color:var(--accent)}.input-textarea{width:100%;min-height:26px;background:none;border:none;outline:none;color:var(--text-primary);font-family:var(--font-body);font-size:14px;line-height:1.6;resize:none;max-height:200px;overflow-y:auto}.input-textarea::placeholder{color:var(--text-muted)}.input-textarea:disabled{opacity:.5}.char-count{font-size:11px;color:var(--text-muted);flex-shrink:0}.char-count.danger{color:var(--danger)}.send-btn{width:34px;height:34px;border-radius:50%;background:var(--accent);color:#fff;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:all .15s}.send-btn:hover:not(:disabled){background:var(--accent-hover);transform:scale(1.05)}.send-btn:disabled{background:var(--border);cursor:default}.send-btn.stop{background:var(--danger)}.send-btn.stop:hover{background:#f87171}.input-disclaimer{text-align:center;font-size:11px;color:var(--text-muted);margin-top:8px}.prompt-footer{width:100%;display:flex;align-items:center;justify-content:space-between;gap:10px}.prompt-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.knowledge-role-toggle{display:inline-grid;grid-template-columns:repeat(2,minmax(0,1fr));width:142px;padding:2px;border:1px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-primary);flex-shrink:0}.knowledge-role-toggle button{min-width:0;height:26px;border:0;border-radius:calc(var(--radius-md) - 2px);background:transparent;color:var(--text-muted);font-size:11px;font-weight:600;cursor:pointer}.knowledge-role-toggle button.active.students{background:#22c55e29;color:var(--student-color)}.knowledge-role-toggle button.active.staff{background:#f59e0b29;color:var(--staff-color)}.knowledge-role-toggle button:disabled{cursor:default;opacity:.6}.attached-files{width:100%;display:flex;align-items:center;gap:6px;flex-wrap:wrap}.attached-file{min-width:0;max-width:220px;display:inline-flex;align-items:center;gap:5px;padding:4px 8px;border:1px solid var(--border-light);border-radius:var(--radius-sm);color:var(--text-secondary);background:var(--bg-primary);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.attached-clear{width:24px;height:24px;border:1px solid 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