.but,
button {
  outline: none;
  border: none;
  background: inherit;
  box-sizing: border-box !important;
}

.button-1 {
  background-color: #3498db;
  color: #fff;
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.button-1:hover {
  color: #e8e8e8;
  background-color: #2980b9;
}

.button-2 {
  background-color: #e74c3c;
  color: #fff;
  padding: 12px 24px;
  border: none;
  border-radius: 3px;
  cursor: pointer;
}

.button-2:hover {
  color: #e8e8e8;
  background-color: #c0392b;
}

.button-3 {
  background-color: #2ecc71;
  color: #fff;
  padding: 8px 16px;
  border: 2px solid #27ae60;
  border-radius: 25px;
  cursor: pointer;
}

.button-3:hover {
  color: #e8e8e8;
  background-color: #27ae60;
}

.button-4 {
  background-color: #f1c40f;
  color: #fff;
  padding: 14px 28px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
}

.button-4:hover {
  color: #e8e8e8;
  background-color: #d4ac0d;
}

.button-5 {
  background-color: #34495e;
  color: #fff;
  padding: 10px 20px;
  border: none;
  border-radius: 0;
  border-bottom: 2px solid #2c3e50;
  cursor: pointer;
}

.button-5:hover {
  color: #e8e8e8;
  background-color: #2c3e50;
}