* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: 'Open Sans', sans-serif;
  background: #d6d0d0;
}
/* Header */
header {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #d25c2d;
  padding: 20px;
  font-size: large;
}

/* Footer */
footer {
  margin-top: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #2da3d2;
  padding: 50px;
}

/* Main */
.description {
  margin: 20px;
  text-align: center;
  font-size: large;
}

.main-content {
  border-radius: 10px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: antiquewhite;
  padding: 20px;
  margin: 20px auto;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* Form */

.form-group {
  margin-bottom: 30px;
}
.form-group label {
  font-size: large;
  font-weight: bold;
  display: block;
  margin-bottom: 4px;
}
.form-group input {
  font-size: medium;
  padding: 10px;
  border-radius: 5px;
  border: 0;
  outline: 0;
}
.form-buttons {
  display: flex;
  flex-direction: column;
}
.btn-calc:not([hidden]) {
  display: block;
  margin-bottom: 4px;
  border-radius: 10px;
  padding: 10px;
  border: none;
  background-color: #20dfb7;
  font-size: medium;
  font-weight: bold;
}
.btn-calc:hover {
  cursor: pointer;
}
.btn-reset:not([hidden]) {
  display: block;
  margin-bottom: 4px;
  border-radius: 10px;
  padding: 10px;
  border: none;
  background-color: #eb7fa3;
  font-size: medium;
  font-weight: bold;
}
.btn-reset:hover {
  cursor: pointer;
}

.results {
  max-width: 250px;
  display: flex;
  flex-direction: column;
  align-items: start;
  justify-content: center;
  background-color: antiquewhite;
  padding: 20px;
  margin: 20px auto;
  border-radius: 10px 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}
p {
  margin-bottom: 10px;
}