@font-face{font-family:'Arial';src:url('arial.ttf') format('truetype');font-weight:normal;font-style:normal}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;display:flex;align-items:center;justify-content:center;font-family:'Arial',sans-serif;overflow:hidden;position:relative}.background-container{position:fixed;top:0;left:0;width:100%;height:100%;background:url('https://st2.depositphotos.com/1533202/7122/i/450/depositphotos_71225641-stock-photo-blurred-nature-background.jpg') center/cover no-repeat;filter:blur(8px) brightness(0.6);z-index:-1;transform:scale(1.05)}.container{background:rgba(255,255,255,0.93);border-radius:16px;box-shadow:0 12px 40px rgba(0,0,0,0.25);padding:2.5rem;width:100%;max-width:480px;text-align:center;backdrop-filter:blur(4px);border:1px solid rgba(255,255,255,0.3);margin:1rem;animation:fadeIn 0.6s ease-out}@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}h1{color:#2c3e50;font-size:1.8rem;font-weight:600;margin-bottom:0.5rem;letter-spacing:-0.5px}.subtitle{color:#7f8c8d;font-size:1rem;margin-bottom:2rem;line-height:1.5}.captcha-container{margin:2rem 0;position:relative}#captcha-canvas{border:1px solid #e0e0e0;border-radius:10px;background:#f9f9f9;display:block;margin:0 auto;box-shadow:inset 0 1px 3px rgba(0,0,0,0.1);cursor:pointer;transition:all 0.3s ease}#captcha-canvas:hover{box-shadow:0 2px 8px rgba(0,0,0,0.15)}.captcha-controls{display:flex;justify-content:center;align-items:center;gap:1rem;margin-top:1rem}.refresh-btn{background:#f8f9fa;border:1px solid #e0e0e0;color:#3498db;cursor:pointer;font-size:0.9rem;padding:0.5rem 1rem;border-radius:6px;transition:all 0.2s ease;display:inline-flex;align-items:center;gap:0.5rem}.refresh-btn:hover{background:#e9ecef;border-color:#ced4da}.refresh-btn:active{transform:scale(0.98)}.audio-btn{background:#f8f9fa;border:1px solid #e0e0e0;color:#3498db;cursor:pointer;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all 0.2s ease}.audio-btn:hover{background:#e9ecef;border-color:#ced4da}.form-container{margin-top:1.5rem}.captcha-input{width:100%;padding:1rem;border:2px solid #e0e0e0;border-radius:10px;font-size:1.1rem;text-align:center;margin-bottom:1.5rem;letter-spacing:3px;font-weight:600;transition:all 0.2s ease;box-shadow:0 1px 2px rgba(0,0,0,0.05);background:#fff;text-transform:uppercase}.captcha-input::placeholder{text-transform:uppercase;letter-spacing:normal;opacity:0.7}.captcha-input:focus{border-color:#3498db;outline:none;box-shadow:0 0 0 3px rgba(52,152,219,0.2)}.submit-btn{width:100%;background:linear-gradient(135deg,#3498db,#2980b9);color:#fff;border:none;border-radius:10px;padding:1rem;font-size:1.1rem;cursor:pointer;font-weight:500;transition:all 0.2s ease;box-shadow:0 2px 4px rgba(0,0,0,0.1);position:relative;overflow:hidden}.submit-btn:hover{box-shadow:0 4px 8px rgba(0,0,0,0.15);transform:translateY(-1px)}.submit-btn:active{transform:translateY(0)}.submit-btn::after{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(rgba(255,255,255,0.1),rgba(255,255,255,0));pointer-events:none}.message{margin-top:1.5rem;padding:1rem;border-radius:10px;font-size:0.95rem;font-weight:500;animation:fadeIn 0.3s ease-in;font-family:'Arial',sans-serif;line-height:1.5}.message.success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.message.error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.message.hidden{display:none}.loading .btn-text{visibility:hidden}.loading .btn-text::after{content:'Verificando...';visibility:visible;display:block;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.spinner{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,0.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:480px){.container{padding:1.75rem}h1{font-size:1.5rem}#captcha-canvas{width:240px;height:70px}.captcha-input{font-size:1rem}}