@import url("https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400;1,700&display=swap");

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

:root {
  /* Spacing */
  --size-1300: 6.5rem; /* 104px */
  --size-900: 4.5rem; /* 72px */
  --size-800: 4rem; /* 64px */
  --size-600: 3rem; /* 48px */
  --size-500: 2.5rem; /* 40px */
  --size-400: 2rem; /* 32px */
  --size-300: 1.5rem; /* 24px */
  --size-200: 1rem; /* 16px */
  --size-100: 0.5rem; /* 8px */
  --size-50: 0.25rem; /* 4px */

  /* Colors */
  --color-white: #ffffff;
  --color-cyan-very-dark: #00494d;
  --color-cyan-dark-grayish: #5e7a7d;
  --color-cyan-grayish: #7f9c9f;
  --color-cyan-light-grayish: #c5e4e7;
  --color-cyan-very-light-grayish: #f4fafa;
  --color-cyan-strong: #26c0ab;
}

body {
  min-block-size: 100vh;
  min-inline-size: 100vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: var(--color-cyan-light-grayish);
  font-family: "Space Mono", serif;
  font-weight: 500;
  font-size: var(--size-200);
}

input {
  inline-size: 100%;
  block-size: var(--size-600);
  padding: 0 calc(var(--size-200) + var(--size-50));
  background-color: #f3f9fa;
  color: var(--color-cyan-very-dark);
  border-radius: var(--size-50);
  border: 0;
  font-family: "Space Mono";
  font-size: var(--size-300);
  font-weight: 700;
  text-align: end;
  outline: none;
}

input:hover,
input:focus,
input:active {
  border: 2px solid #26c2ae;
}

input[type="number"] {
  appearance: none;
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

label {
  color: var(--color-cyan-dark-grayish);
  font-family: "Space Mono";
  font-weight: 700;
}

button {
  block-size: var(--size-600);
  border-radius: var(--size-50);
  border: 0;
  outline: 0;
  font-family: "Space Mono";
  font-size: var(--size-300);
  font-weight: 700;
  background-color: var(--color-cyan-very-dark);
  color: var(--color-white);
  transition: all 0.2s ease;
}

button > * {
  inline-size: 15ch;
}

button:hover,
button:active,
button:focus {
  color: var(--color-cyan-very-dark);
  background-color: #9fe8df;
}

button,
input {
  cursor: pointer;
}

.hero {
  block-size: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--size-600) 0;
}

.tip-card {
  inline-size: 100%;
  block-size: 100%;
  padding: clamp(2rem, 0.8571rem + 2.381vw, 3rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: var(--size-200) var(--size-200) 0 0;
  background-color: var(--color-white);
  gap: clamp(2rem, 1.6479rem + 1.5023vw, 3rem);
}

.tip-card > :first-child {
  inline-size: calc(100% - clamp(2rem, 1.6479rem + 1.5023vw, 3rem) / 3);
  display: flex;
  flex-direction: column;
  gap: var(--size-400);
}

.form-input {
  inline-size: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--color-cyan-dark-grayish);
}

.form-input > div {
  inline-size: 100%;
  display: flex;
  justify-content: space-between;
}

#bill-amount-input,
#tip-split-input {
  background-repeat: no-repeat;
  background-size: auto calc(var(--size-200) + var(--size-50));
  background-position: var(--size-200) center;
}

#bill-amount-input {
  background-image: url("../assets/icons/icon-dollar.svg");
}

#tip-split-input {
  background-image: url("../assets/icons/icon-person.svg");
}

.tip-options {
  inline-size: 100%;
  display: flex;
  flex-direction: column;
  align-items: start;
  gap: var(--size-200);
}

.tip-options div {
  inline-size: 100%;
  display: flex;
  flex-direction: wrap;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--size-200);
}

#custom-tip {
  text-align: center;
  font-size: calc(var(--size-200) + var(--size-50));
  padding: 0, var(--size-50);
}

.tip-options .tip-percentage-buttons > * {
  inline-size: calc((100% - var(--size-200)) / 2);
  block-size: var(--size-600);
  row-gap: var(--size-200);
  column-gap: var(--size-200);
}

.tip-result {
  inline-size: 100%;
  padding: var(--size-500);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--color-white);
  background-color: var(--color-cyan-very-dark);
  border-radius: var(--size-200);
  border: 0;
}

.tip-result > div {
  block-size: auto;
  display: flex;
  flex-direction: column;
  gap: calc(var(--size-200) + var(--size-50));
}

.tip-amount,
.tip-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tip-amount p,
.tip-total p {
  display: flex;
  flex-direction: column;
  align-items: start;
}

#reset-btn {
  color: var(--color-cyan-very-dark);
  background-color: var(--color-cyan-strong);
  text-transform: uppercase;
}

#reset-btn:hover {
  color: var(--color-cyan-very-dark);
  background-color: #9fe8df;
}

.minor-text {
  color: var(--color-cyan-grayish);
  font-size: calc(var(--size-100) + var(--size-50));
}

.result-value {
  color: var(--color-cyan-grayish);
  font-size: clamp(2rem, 0.8571rem + 2.381vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.67px;
}

.selected-tip {
  background-color: var(--color-cyan-strong);
  color: var(--color-cyan-very-dark);
}

input.validation-error {
  border: 2px solid #e17052;
}

.validation-error-text {
  color: #e17052;
}

.btn-active-state {
  color: var(--color-cyan-very-dark);
  background-color: #9fe8df;
}

@media (min-width: 48rem) {
  .tip-card {
    block-size: auto;
    border-radius: var(--size-200);
  }
}

@media (min-width: 59.25rem) {
  .tip-card {
    inline-size: clamp(30.6875rem, 0.0446rem + 63.8393vw, 57.5rem);
    block-size: 30rem;
    flex-direction: row;
    border-radius: var(--size-300);
  }

  .tip-card > * {
    block-size: 100%;
  }

  .tip-options .tip-percentage-buttons > * {
    inline-size: calc((100% - var(--size-200) * 2) / 3);
  }
}