@media (max-width: 767px) {}
@media (min-width: 768px) {}
@media (min-width: 992px) {}
@media (min-width: 1200px) {}

html,
body {
  background-color: #fff;
  color: #333;
  font-family: 'Lato', Helvetica, Arial, sans-serif;
}

.container {
  margin: 0 auto;
  max-width: 600px;
}

/*
 * Header Section
 */
header {
  margin-bottom: 40px;
}

/*
 * Main Section
 */
main .answer,
main span {
  font-size: 1.25rem;
  letter-spacing: .5px;
}

main .span-title {
  margin-bottom: 10px;
}

main .calc-section {
  align-items: center;
  background-color: #eef5fb;
  border-radius: 4px;
  box-shadow: 0px 1px 3px 0px rgba(0, 0, 0, .2),
              0px 1px 1px 0px rgba(0, 0, 0, .14),
              0px 2px 1px -1px rgba(0, 0, 0, .12);
  display: flex;
  justify-content: space-between;
  margin-bottom: 30px;
  padding: 26px 24px;
}

/*
 * Inputs
 */
.input-container {
  display: inline-block;
  position: relative;
  transition: .2s ease-in-out;
}

.answer input[type="text"] {
  font-weight: bold;
}

input[type="text"] {
  border: 1px solid rgba(0, 0, 0, .42);
  border-radius: .25rem;
  font-size: 18px;
  max-width: 70px;
  padding: .375rem .75rem;
  transition: .2s ease-in-out;
}

input[type="text"]:hover {
  border-color: rgba(0, 0, 0, .87);
}

input[type="text"]:focus {
  border-color: #1976d2;
  outline: none;
}

/*
 * Etc
 */
.hidden {
  opacity: 0;
}