.center{
  width: 150px;
  margin: 40px auto;  
}
.mayus{width:500px; display:block; margin:0 auto;}
.mayus p{font-size:12px;}
article p::first-letter {
  float: left;
  font-size: 300%;
  margin: 0 10px 10px 0;
}

.color{
	background-color: #25EAC4
}

.input-number-group {
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
}

.input-number-group input[type=number]::-webkit-inner-spin-button,
.input-number-group input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
          appearance: none;
}

.input-number-group .input-group-button {
  line-height: calc(80px/2 - 5px);
}

.input-number-group .input-number {
  width: 80px;
  padding: 0 12px;
  vertical-align: top;
  text-align: center;
  outline: none;
  display: block;
  margin: 0;
}

.input-number-group .input-number,
.input-number-group .input-number-decrement,
.input-number-group .input-number-increment {
  border: 1px solid #cacaca;
  height: 40px;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  border-radius: 0;
}

.input-number-group .input-number-decrement,
.input-number-group .input-number-increment {
  display: inline-block;
  width: 40px;
  background: #e6e6e6;
  color: #0a0a0a;
  text-align: center;
  font-weight: bold;
  cursor: pointer;
  font-size: 2rem;
  font-weight: 400;
}

.input-number-group .input-number-decrement {
  margin-right: 0.3rem;
}

.input-number-group .input-number-increment {
  margin-left: 0.3rem;
}