*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #2a4d8f;--secondary: #00a6a6;--text-dark: #213547;--text-light: #ffffff;--background: #ffffff;--background-alt: #f5f7fa;--radius: 8px;--transition: .3s ease}body{font-family:Inter,Segoe UI,Arial,sans-serif;line-height:1.6;color:var(--text-dark);background-color:var(--background);min-width:320px;min-height:100vh;display:flex;flex-direction:column}h1,h2,h3{font-weight:700;color:var(--text-dark)}h1{font-size:3rem;line-height:1.2}p{margin-bottom:1em;color:#444}a{color:var(--primary);font-weight:500;text-decoration:none;transition:color var(--transition)}a:hover{color:var(--secondary)}button,.btn{border-radius:var(--radius);border:none;padding:.75em 1.5em;font-size:1rem;font-weight:600;cursor:pointer;transition:background var(--transition),transform var(--transition)}.btn-primary{background:var(--primary);color:var(--text-light)}.btn-primary:hover{background:#1f3a6b;transform:translateY(-2px)}.btn-secondary{background:var(--secondary);color:var(--text-light)}.btn-secondary:hover{background:teal;transform:translateY(-2px)}section{padding:4rem 2rem;text-align:center}section.alt{background-color:var(--background-alt)}@media (max-width: 768px){h1{font-size:2.2rem}section{padding:2rem 1rem}}body{margin:0;font-family:Inter,sans-serif;background-color:#f4f6f9;color:#333;display:flex;flex-direction:column;min-height:100vh}.navbar{display:flex;justify-content:space-between;align-items:center;background:#a1b5ff;color:#fff;padding:1rem 2rem;font-size:1.1rem}.logo{font-weight:700;font-size:1.3rem}.tagline{font-style:italic;font-size:.95rem;opacity:.9}.container{background-color:#fff;padding:2rem;border-radius:16px;box-shadow:0 4px 12px #0044ff26;width:95%;max-width:1200px;margin:2rem auto;display:flex;flex-direction:column;flex:1}.hero{text-align:center;margin-bottom:1.5rem}.hero h2{color:#1a73e8;margin-bottom:.5rem}.hero p{color:#555}.form-group{margin-bottom:1.5rem}#image-upload{display:none}.custom-file-upload{display:inline-block;padding:10px 15px;background-color:#007bff;color:#fff;border-radius:5px;cursor:pointer;font-weight:700;transition:background-color .3s ease}.custom-file-upload:hover{background-color:#0056b3}label{display:block;margin-bottom:.5rem;font-weight:700}#image-upload{display:none;margin-bottom:1rem;background-color:#f0f6ff;border:1px solid #ccd9ff;border-radius:6px;padding:.75rem;font-size:1rem;cursor:pointer}textarea{width:100%;padding:.75rem;border:1px solid #ccc;border-radius:6px;font-size:1rem;box-sizing:border-box;resize:vertical}.preview{margin-top:1rem;text-align:center}.preview img{max-width:100%;max-height:300px;border-radius:8px;box-shadow:0 3px 8px #00000026}button{background-color:#1a73e8;color:#fff;border:none;border-radius:6px;padding:.75rem 1.5rem;font-size:1rem;cursor:pointer;transition:background-color .3s ease}button:disabled{background-color:#a8c8e8}button:hover:not(:disabled){background-color:#155bb5}.chat-box{flex:1;margin:1rem 0;padding:1rem;border:1px solid #e1e5eb;border-radius:12px;background:#f9fafc;overflow-y:auto;max-height:500px}.chat-message{display:flex;margin-bottom:1rem}.chat-message.user{justify-content:flex-end}.chat-message.assistant{justify-content:flex-start}.bubble{max-width:80%;padding:.9rem 1.2rem;border-radius:16px;line-height:1.4;white-space:pre-wrap;font-size:.95rem}.user .bubble{background:#1a73e8;color:#fff;border-bottom-right-radius:4px}.assistant .bubble{background:#e8f0fe;color:#333;border-bottom-left-radius:4px}.typing{font-style:italic;opacity:.7}.chat-input{display:flex;gap:.5rem;margin-top:1rem}.chat-input textarea{flex:1;border-radius:6px}.error-message{margin-top:1rem;padding:1rem;background-color:#fce8e8;color:#d93025;border:1px solid #f9bdbd;border-radius:6px}.footer{text-align:center;padding:1rem;margin-top:auto;background:#f1f5f9;font-size:.9rem;color:#555}@media (max-width: 768px){.navbar{flex-direction:column;text-align:center}.container{padding:1rem;width:95%}.bubble{max-width:90%;font-size:.9rem}button{border-radius:6px;padding:.5rem 1rem;font-size:.7rem}}