body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background-color: white;
  padding: 15px;
  border-radius: 2%;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  width: 300px;
}

h1 {
  text-align: center;
}

h1 span {
  font-size: 15px;
}

.ket {
  margin-bottom: 20px;
  text-align: center;
  width: 230px;
  background-color: #6e706e27;
  margin-left: 30px;
  padding: 7px;
  border-radius: 30px;
  border: #555 2px solid;
}
.ket p {
  font-size: 13px;
  color: #555;
  text-align: start;
}

label {
  display: block;
  margin-bottom: 5px;
}

input {
  width: 100%;
  padding: 8px;
  margin-bottom: 10px;
  box-sizing: border-box;
}

button {
  width: 100%;
  padding: 10px;
  background-color: #4caf50;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

#result {
  /* margin-top: 10px; */
  padding: 10px;
  background-color: #e9e9e9;
  border-radius: 4px;
  text-align: center;
}

.reset {
  margin-top: 10px;
  text-align: center;
  width: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.reset button {
  background-color: #f44336;
  border-radius: 40px;
}
.reset button:hover {
  background-color: #d32f2f;
}
.reset button:active {
  background-color: #b71c1c;
}
.reset button:focus {
  outline: none;
}

#calculate:hover {
  background-color: #45a049;
}
#calculate:active {
  background-color: #3e8e41;
}
#calculate:focus {
  outline: none;
}