*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #4f46e5;--primary-dark: #4338ca;--primary-light: #818cf8;--secondary: #06b6d4;--secondary-dark: #0891b2;--accent: #8b5cf6;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--text-dark: #1e293b;--text-medium: #64748b;--text-light: #94a3b8;--text-white: #ffffff;--background: #ffffff;--background-alt: #f8fafc;--background-dark: #0f172a;--border: #e2e8f0;--border-light: #f1f5f9;--radius-sm: 6px;--radius: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--transition: .2s cubic-bezier(.4, 0, .2, 1);--transition-slow: .3s cubic-bezier(.4, 0, .2, 1)}body{font-family:Inter,Segoe 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1.25rem;border-radius:var(--radius-lg);line-height:1.6;white-space:pre-wrap;font-size:.95rem;box-shadow:var(--shadow-sm);transition:all var(--transition)}.bubble:hover{box-shadow:var(--shadow-md)}.user .bubble{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;border-bottom-right-radius:4px}.assistant .bubble{background:var(--background);color:var(--text-dark);border-bottom-left-radius:4px;border:2px solid var(--border-light)}.typing{display:inline-flex;align-items:center;gap:.25rem}.typing:after{content:"";animation:pulse 1.5s infinite}.chat-input{display:flex;gap:.75rem;margin-top:1.25rem}.chat-input textarea{flex:1;border-radius:var(--radius)}.chat-input button[type=submit]{width:auto;margin-top:0;padding:.875rem 1.75rem;white-space:nowrap}.chat-controls{display:flex;gap:.75rem;margin:1rem 0;flex-wrap:wrap}.chat-controls button{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 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ease-out;display:flex;align-items:center;gap:.75rem}.error-message:before{content:"⚠";font-size:1.25rem}.footer{text-align:center;padding:1.5rem;margin-top:auto;background:linear-gradient(135deg,#f8fafc,#e2e8f0);font-size:.9rem;color:var(--text-medium);border-top:2px solid var(--border-light)}.footer img{margin-top:.75rem;transition:transform var(--transition)}.footer img:hover{transform:scale(1.05)}.skeleton{background:linear-gradient(90deg,var(--border-light) 25%,var(--border) 50%,var(--border-light) 75%);background-size:1000px 100%;animation:shimmer 2s infinite;border-radius:var(--radius)}.loading-spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin .8s linear infinite;margin-right:.5rem}@keyframes spin{to{transform:rotate(360deg)}}.typing-dots span{animation:blink 1.4s infinite;animation-fill-mode:both;font-size:1.5rem;line-height:1}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes blink{0%,80%,to{opacity:0}40%{opacity:1}}.custom-file-upload.dragging{background:linear-gradient(135deg,var(--secondary) 0%,var(--secondary-dark) 100%);border-color:var(--secondary);transform:scale(1.05)}@media(max-width:768px){.navbar{flex-direction:column;text-align:center;gap:.75rem;padding:1rem 1.5rem}.container{padding:1.5rem;width:95%;margin:1.5rem auto;border-radius:var(--radius-lg)}.hero h2{font-size:1.5rem}.hero p{font-size:1rem}.bubble{max-width:85%;font-size:.9rem;padding:.875rem 1rem}.chat-controls{flex-direction:column}.chat-controls button{width:100%;justify-content:center}.chat-input{flex-direction:column}.chat-input button[type=submit]{width:100%}}