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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Descargar</title> <style> body { font-family: Arial, sans-serif; text-align: center; } .button { display: inline-block; padding: 10px 20px; font-size: 16px; color: white; background-color: red; border: 2px solid red; border-radius: 5px; cursor: pointer; transition: border-color 0.5s; } .button:hover { border-color: green; } </style> </head> <body> <button...