header {
  text-align: center;
  color: var(--color-green-900);
  padding: 1.8rem 0;
}

header h1 {
  letter-spacing: 0.5rem;
  font-size: 1.4rem;
}

body {
  background-color: var(--color-grey-200);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

main {
  background-color: white;
  border-top-left-radius: 1.8rem;
  border-top-right-radius: 1.8rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.8rem;
  padding-bottom: 4rem;
  font-weight: 600;
  color: var(--color-grey-500);
  gap: 2rem;
}

main .control-panel {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

main .control-panel .form {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

main .control-panel .form .label-wrapper {
  display: flex;
  justify-content: space-between;
}

main .control-panel .form .input-wrapper {
  display: flex;
  border-radius: 5px;
  background-color: var(--color-grey-50);
  padding: 0.5rem 1rem;
  align-items: center;
}

main .control-panel .form .input-wrapper:focus-within {
  outline: 3px solid var(--color-green-400);
}

main .control-panel .form .input-wrapper img {
  width: fit-content;
  height: fit-content;
}

main .control-panel .form .input-wrapper .input {
  border: none;
  font-size: 1.2rem;
  flex: 1;
  text-align: right;
  background-color: transparent;
  border: none;
  outline: none;
  color: var(--color-green-900);
  width: 100%;
}

main .control-panel .form .input-wrapper input::placeholder {
  color: var(--color-grey-200);
}

main .control-panel .form .tip-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  /* grid-template-columns: 50% 50%; */
  justify-content: space-between;
  gap: 1rem;
}

main .control-panel .form .tip-selector .btn {
  padding: 0.5rem 0;
  border: none;
  border-radius: 5px;
  font-size: 1.2rem;
}

.custom {
  padding: 0.5rem 0;
  border: none;
  text-align: center;
  border-radius: 5px;
  font-size: 1.2rem;
  width: 100%;
  color: var(--color-green-900);
  background-color: var(--color-grey-50);
}

.custom::placeholder {
  color: var(--color-grey-500);
}

.custom:focus {
  outline: 2px solid var(--color-green-400);
}

.result-panel {
  background-color: var(--color-green-900);
  border-radius: 1rem;
  padding: 1.5rem;
  padding-top: 2.5rem;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.result-panel .wrapper {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.result-panel .value-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.result-panel .value-wrapper div {
  display: flex;
  flex-direction: column;
}

.result-panel .value-wrapper div .main-text {
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
}

.result-panel .value-wrapper div .side-text {
  font-size: 0.8rem;
}

.result-panel .value-wrapper .value {
  font-size: 1.8rem;
  color: var(--color-green-400);
}

.result-panel button {
  margin-top: 1rem;
  background-color: var(--color-green-400);
  border-radius: 0.4rem;
  border: none;
  width: 100%;
  color: var(--color-green-900);
  padding: 0.6rem 0;
}

footer {
  position: absolute;
  bottom: calc(80vh / 100vh * 20px);
  padding: 0px 1.8rem;
  font-size: 11px;
  text-align: center;
}

footer a {
  font-weight: 600;
  color: var(--color-green-900);
}