:root {
  --color-off-white: hsl(0, 100%, 100%);
  --color-dark: hsl(183, 100%, 15%);
  --color-500: hsl(186, 14%, 43%);
  --color-400: hsl(184, 14%, 56%);
  --color-200: hsl(185, 41%, 84%);
  --color-50: hsl(189, 47%, 97%);
  --color-primary: hsl(172, 67%, 45%);
  --bg-off-white: hsl(0, 100%, 100%);
  --bg-dark: hsl(183, 100%, 15%);
  --bg-500: hsl(186, 14%, 43%);
  --bg-400: hsl(184, 14%, 56%);
  --bg-200: hsl(185, 41%, 84%);
  --bg-50: hsl(189, 47%, 97%);
  --bg-primary: hsl(172, 67%, 45%);
}

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
}

body {
  min-height: 100vh;
  min-height: 100svh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

p {
  text-wrap: pretty;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  text-wrap: balance;
}

button {
  border: unset;
  background-color: unset;
}

fieldset {
  border: unset;
}

input + [hidden] {
  display: none;
}

:is(input:hover, button:hover) {
  cursor: pointer;
}

.visually-hidden:not(:focus):not(:active) { 
  clip: rect(0 0 0 0); 
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap; 
  width: 1px;
}

.page {
  background-color: var(--bg-200);
  color: var(--color-500);
  font-family: "Space Mono";
  font-size: 1rem;
}

.box--img {
  display: grid;
  place-content: center;
  padding-block: 3.125rem 2.5rem;
}

.form {
  max-width: 23.4375rem;
  background-color: var(--bg-off-white);
  border-radius: 20px;
  overflow: hidden;
  margin: auto;
  padding: 2rem 1.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.form__section-1 {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.box--input {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.input {
  background-color: var(--bg-50);
  font-size: 1.5rem;
  color: var(--color-dark);
  text-align: end;
  padding: 5px;
  border: unset;
  border-radius: 5px;
  caret-color: var(--color-primary);
  outline-offset: 2px;
}

.input:hover,
[id="tip-6"]:hover {
  outline: auto 1px var(--color-primary);
}

.box--input__input {
  background-repeat: no-repeat;
  background-position: center left 1ch;
  padding-left: 3ch;
  margin-top: .5rem;
}

::placeholder {
  color: var(--color-200); 
}

input[id="bill"] {
  background-image: url(./images/icon-dollar.svg);
}

input[id="number-of-people"] {
  background-image: url(./images/icon-person.svg);
}

.fieldset {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.fieldset__legend {
  grid-column: 1 / span 2;
  margin-bottom: 1rem;
  width: max-content;
}

.box--radio {
  background-color: var(--bg-dark);
  max-height: 100%;
  padding-block: 5px;
  border-radius: 5px;
  text-align: center;
  position: relative;
}

.box--radio label {
  color: var(--color-off-white);
  font-size: 1.5rem;
}

.box--radio input[type="radio"] {
  appearance: unset;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 5px;
  outline-offset: 2px;
}

.box--radio:last-child {
  background-color: var(--bg-50);
}

.box--radio:last-child label {
  color: var(--color-500);
}

.custom {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  visibility: hidden;
}

.box--radio:not(:last-child):hover {
  background-color: var(--bg-200);
}

.box--radio:not(:last-child):hover label {
  color: var(--color-dark);
}

.box--radio:not(:last-child):has(input:checked) {
  background-color: var(--bg-primary);
} 

.box--radio:not(:last-child):has(input:checked) label {
  color: var(--color-dark);
}

input:checked + input {
  visibility: visible;
}

.box--input-error-message {
  text-align: end;
}

.fieldset-error-message {
  text-align: end;
  margin-top: -2rem;
}

.invalid {
  color: darkorange;
}

.box--input__input:has( + .invalid),
.fieldset:has( + .invalid) .custom {
  border-radius: 5px;
  outline: auto 1px darkorange;
}

.form__section-2 {
  background-color: var(--bg-dark);
  border-radius: 10px;
  padding: 1.5rem;
}

.box-summary {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.box-tip,
.box-total {
  display: grid;
  grid-template-columns: auto 1fr;
}

.title-tip-1,
.title-total-1 {
  display: flex;
  flex-direction: column;
  color: var(--color-off-white);
  font-size: 1rem;
}

.title-tip-2,
.title-total-2 {
  color: var(--color-400);
  font-size: 0.8125rem;
}

.text-tip-1,
.text-total-1 {
  color: var(--color-primary);
  font-size: 1.875rem;
  justify-self: end;
  max-width: 100%;
  text-overflow: clip;
  overflow: hidden;
  white-space: nowrap;
}

.button-reset {
  width: 100%;
  margin-top: 2rem;
  font-size: 1.25rem;
  text-transform: uppercase;
  background-color: var(--bg-500);
  color: var(--color-dark);
  padding-block: .5rem;
  border-radius: 5px;
}

.button-reset:hover {
  background-color: var(--bg-200);
}

.allValid {
  background-color: var(--bg-primary);
}

@media (min-width: 57.5rem) {
  .page {
    display: grid;
    place-content: center;
  }

  .box--img {
    padding-block: 0 5rem;
  }

  .form {
    max-width: 57.5rem;
    padding: 2rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
  }

  .form__section-1 {
    gap: 2.5rem;
    padding: 1rem;
  }

  .box--input {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .box--input__input {
    grid-column: 1 / span 2;
    grid-row: 2;
  }

  .fieldset {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .form__section-2 {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
  }

  .box-summary {
    margin-top: unset;
  }

  .title-tip-1,
  .title-total-1 {
    align-self: center;
  }

  .text-tip-1,
  .text-total-1 {
    font-size: 2.875rem;
  }

  .button-reset {
    margin-top: auto;
  }
}