@font-face {
  font-family: "Roboto";
  src: local("Roboto-Regular"),
    url(../fonts/Roboto-Regular.woff2) format("woff2"),
    url(../fonts/Roboto-Regular.woff) format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Roboto";
  src: local("Roboto-Regular"),
    url(../fonts/Roboto-Bold.woff2) format("woff2"),
    url(../fonts/Roboto-Bold.woff) format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

body {
  font-family: "Roboto", sans-serif;
  font-weight: 400;
  background-color: #999;
}

html {
  box-sizing: border-box;
  text-align: justify;
}

.container {
  width: 500px;
  margin: 0 auto;
  margin-top: 100px;
}

.app_title {
  margin-left: 15px;
}

.number-card_form {
  margin-left: 15px;
}

.number-card_input {
  margin-top: 15px;
  width: calc(100% - 30px);
  display: block;
  margin-bottom: 15px;
}

.number-card_button {
  margin-bottom: 30px;
}

.main {
  width: 500px;
  height: 500px;
  outline: 2px solid #814f4f;
  display: flex;
}

.cards_list {
  margin: auto;
  width: 90%;
  height: 90%;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
  align-content: space-evenly;
  list-style: none;
}

.card {
  width: 100px;
  height: 100px;
  background-color: #999;
  display: flex;
}

.btn {
  width: 100%;
  padding: 0;
  text-align: center;
  font-size: 40px;
  cursor: pointer;
  border: 1px solid transparent;
  outline: none;
  transition: all .3s ease;
}

.btn:hover {
  border-color: red;
}

.btn:disabled {
  background-color: blue;
  color: white;
  transition: all .3s ease;
}

.btn-1 {
  display: inline-block;
  margin: 20px 50px;
  padding: 0;
  width: 80%;
  font-size: 30px;
}