*{
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

.selector {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

body {
  background-image: linear-gradient(
    to right bottom,
    #a3b3cf,
    #84a3bc,
    #6793a6,
    #4d838e,
    #387274
  );
  background-repeat: no-repeat;
  background-size: 100vw 100vh;
  height: 100%;
}

.container-calculator {
  margin: 50px auto;
  padding: 50px;
  width: 100%;
  height: 700px;
  max-width: 350px;
  border: 7px solid rgb(35, 35, 35);
  background-color: rgb(25, 25, 25);
  border-radius: 10px;
  box-shadow: 10px 10px 5px 10px rgba(0, 0, 0, 0.5);
}

.output-container {
  margin-top: 15px;
  margin-bottom: 40px;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.actual-action {
  font-size: 20px;
  text-align: right;
  padding-right: 20px;
  height: 20px;
}

input[type="text"] {
  -moz-appearance: textfield;
}

input[type="text"] {
  box-sizing: border-box;
  font-size: 20px;
  width: 100%;
  height: 30px;
  border: none;
  text-align: right;
  padding-right: 15px;
}

input[type="text"]:hover {
  cursor: default;
}

input[type="text"]:focus {
  cursor: default;
  outline: none;
}

.display {
  background-color: rgb(255, 255, 255);
  box-shadow: inset 3px 5px 10px rgba(0, 0, 0, 0.8);
  padding: 15px;
}

.container-buttons {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.button-number {
  width: 35px;
  height: 35px;
  padding: 20px;
  margin: 10px;
  font-size: 30px;
  font-weight: bold;
  text-align: center;
  background-color: gray;
  border-radius: 10px;
}

.button-number:hover {
  background-color: rgb(58, 58, 58);
  cursor: pointer;
}