body {
  font-family: 'Roboto', sans-serif;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background-color: #f9f9f9;
  color: #333;
  padding: 20px;
}

section {
  background-color: #fff;
  margin: 20px auto;
  padding: 30px;
  max-width: 800px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

h2 {
  font-size: 28px;
  color: #0b6efd;
  margin-bottom: 15px;
  border-left: 4px solid #0b6efd;
  padding-left: 10px;
}

h3 {
  font-size: 22px;
  color: #333;
  margin-top: 25px;
}

a {
  color: #0b6efd;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

p {
  margin-bottom: 15px;
  font-size: 16px;
}

@media (max-width: 600px) {
  body {
    padding: 10px;
  }

  section {
    padding: 20px;
  }

  h2 {
    font-size: 22px;
  }

  h3 {
    font-size: 18px;
  }

  p {
    font-size: 15px;
  }
}
/*===================================================*/
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: #0b6efd;
  color: white;
  padding: 10px 12px;
  border-radius: 50%;
  font-size: 18px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  text-align: center;
  z-index: 1000;
}

.back-to-top:hover {
  background: #094ec2;
}