.app{color:#333}.app-header{background:#fff;padding:30px;border-radius:16px;box-shadow:0 8px 32px #0000001a;text-align:center;margin-bottom:30px}.app-header h1{font-size:2.5rem;margin-bottom:10px;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.app-header p{color:#666;font-size:1.1rem}.ai-section{background:linear-gradient(135deg,#667eea15,#764ba215);border:2px solid #667eea;padding:30px;border-radius:16px;margin-bottom:30px;box-shadow:0 8px 32px #667eea33}.ai-section h2{margin-top:0;color:#667eea;font-size:2rem;text-align:center}.api-key-setup{background:#fff;padding:30px;border-radius:12px;box-shadow:0 4px 16px #00000014}.api-key-setup h3{color:#667eea;margin-top:0}.api-key-setup .input-group{display:flex;gap:10px;margin-bottom:15px}.api-key-setup input{flex:1;padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:14px}.api-key-setup button{padding:12px 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#00000026}button:active{transform:translateY(0)}input,select{border:1px solid #ddd;border-radius:6px;padding:8px 12px;font-size:14px;transition:border-color .3s ease}input:focus,select:focus{outline:none;border-color:#667eea}