/* ------------------ */
/* CSS RESET         */
/* ------------------ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
}

body {
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  font-family: "Space Mono", monospace;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

input,
button {
  font: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

fieldset {
  border: none;
}

legend {
  margin-bottom: 0.75rem;
}

body {
  background-color: #c5e4e7;
  display: grid;
  place-items: center;
}

.app-header {
  margin-top: 3rem;
}

.calculator-card {
  max-width: 375px;
  background: #ffffff;
  border-radius: 1.5rem;
  padding: 2rem;
  max-width: 920px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.calculator-inputs {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.field span,
legend {
  color: #5e7a7d;
  font-size: 0.9rem;
}

input {
  background: #f3f9fa;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  text-align: right;
  font-weight: 700;
  color: #00494d;
}

.tip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.tip-grid button {
  background: #00494d;
  color: #fff;
  padding: 0.75rem;
  border-radius: 0.5rem;
  font-weight: 700;
}

.tip-grid input {
  text-align: center;
}

.tip-grid button,
.tip-grid input {
  width: 100%;
  height: 3rem;
  border-radius: 0.5rem;
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
}

.calculator-results {
  background: #00494d;
  border-radius: 1rem;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

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

.result p {
  color: #fff;
  font-weight: 700;
}

.result span {
  color: #7f9c9f;
  font-size: 0.8rem;
}

output {
  color: #26c0ab;
  font-size: 2rem;
  font-weight: 700;
}

.reset-btn {
  margin-top: auto;
  background: #26c0ab;
  padding: 0.75rem;
  border-radius: 0.5rem;
  font-weight: 700;
  color: #00494d;
  outline: none;
  border: none;
}

.label-row {
  display: flex;
  justify-content: space-between;
}

.error-message {
  display: none;
  color: #e17052;
  font-size: 0.8rem;
}

.people-field.error .error-message {
  display: block;
  color: #e17052;
}

.people-field.error input {
  outline: 2px solid #e17052;
}

.span_div {
  display: flex;
  justify-content: space-between;
}

/* Active tip button style */
.tip-grid button.active {
  background-color: hsl(172, 67%, 45%);
  color: white;
}

/* Custom tip input when active (focused or has value) */
.tip-grid input.active {
  outline: 2px solid hsl(172, 67%, 45%);
  color: hsl(172, 67%, 45%);
  font-weight: 700;
}

input.active {
  outline: 2px solid hsl(172, 67%, 45%);
  color: hsl(172, 67%, 45%);
  font-weight: 700;
}

/* 
  Media Queries
*/

@media (max-width: 768px) {
  .calculator-card {
    grid-template-columns: 1fr;
  }
  .app-header {
    margin-bottom: 2rem;
  }
}