style.css

/*
  CSS Reset from
  Josh: https://www.joshwcomeau.com/css/custom-css-reset/
  Andy-bell: https://andy-bell.co.uk/a-more-modern-css-reset/
*/
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

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

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

h1,
h2,
h3,
h4,
button,
input,
label {
  line-height: 1.1;
}

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

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

a {
  text-decoration: none;
  text-decoration-skip-ink: auto;
  color: currentColor;
  cursor: pointer;
}

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

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

textarea:not([rows]) {
  min-height: 10em;
}

ul,
ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

address {
  font-style: normal;
}
/* Reset Ends */

/* Hides screen-reader contents */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Fonts */
@font-face {
  font-family: Poppins;
  font-weight: 400;
  font-style: italic;
  src: url(./assets/fonts/Poppins.woff2);
}

@font-face {
  font-family: Poppins;
  font-weight: 700;
  font-style: normal;
  src: url(./assets/fonts/Poppins\ Bold.woff2);
}

@font-face {
  font-family: Poppins;
  font-weight: 800;
  font-style: italic;
  src: url(./assets/fonts/Poppins\ ExtraBold\ Italic.woff2);
}

/* Custom properties */
:root {
  /* primary colors */
  --purple: hsl(259, 100%, 65%);
  --light-red: hsl(0, 100%, 67%);
  --light-tomato: hsla(4, 100%, 67%, 0.14);

  /* neutral colors */
  --white: hsl(0, 0%, 100%);
  --off-white: hsl(0, 0%, 94%);
  --light-grey: hsl(0, 0%, 86%);
  --smokey-grey: hsl(0, 1%, 44%);
  --off-black: hsl(0, 0%, 8%);

  /* gradients */
  --bg-gradient: linear-gradient(
    45deg,
    hsl(259deg 100% 65%) 0%,
    hsl(321deg 94% 50%) 80%,
    hsl(0deg 100% 67%) 100%
  );

  /* box shadow */
  --section-shadow: 0px 10px 15px -3px hsla(0, 0%, 0%, 0.1);

  /* font-weights */
  --regular: 400;
  --bold: 700;
  --extra-bold: 800;
}

html {
  font-family: Poppins;
}

/* Layout style */
body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background-color: var(--off-white);
}

main {
  width: min(100%, 680px);
  padding: 2.75rem 2rem;
  border-radius: 1rem 1rem 6rem 1rem;
  background-color: var(--white);
  box-shadow: var(--section-shadow);
}

/* Form style begins */
.form {
  position: relative;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0 0 3.5rem;
  border-bottom: 1px solid var(--light-grey);
}

.form__input-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  flex: 1 0 80px;
}

.form__label {
  font-size: 0.8rem;
  font-weight: var(--regular);
  color: var(--smokey-grey);
  letter-spacing: 2px;
  line-height: 1.5;
  margin-bottom: 2px;
}

.form__label:has(+ .form__input[aria-invalid='true']) {
  color: var(--light-red);
}

.form__input {
  font-size: 1rem;
  color: var(--off-black);
  width: calc(100% - 15px);
  min-width: 80px;
  padding: 0.5rem 1rem;
  border: 1px solid var(--light-grey);
  border-radius: 5px;
}

.form__input::placeholder {
  color: var(--smokey-grey);
}

.form__input:is(:focus, :focus-visible) {
  outline-color: var(--purple);
}

.form__input[aria-invalid='true'] {
  border-color: var(--light-red);
}

.form__error-message {
  font-size: clamp(0.5rem, 11.7vw, 0.7rem);
  font-weight: var(--regular);
  font-style: italic;
  color: var(--light-red);
  margin-top: 0.3rem;
}

.form__error-message_hide {
  display: none;
}

.form__input_invalid {
  animation: shake-form-input 0.82s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
  transform: translateX(0);
}

@keyframes shake-form-input {
  10%,
  90% {
    transform: translateX(-1px);
  }

  20%,
  80% {
    transform: translateX(2px);
  }

  30%,
  50%,
  70% {
    transform: translateX(-4px);
  }

  40%,
  60% {
    transform: translateX(4px);
  }
}

.btn {
  width: 58px;
  height: 58px;
  padding: 1rem;
  background-image: none;
  background-color: var(--purple);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn:is(:hover, :active) {
  background-color: var(--off-black);
}

.btn:is(:focus, :focus-visible) {
  outline-color: var(--purple);
  background-color: var(--off-black);
}

.form__btn {
  position: absolute;
  left: calc(50% - 29px);
  bottom: 0;
  transform: translateY(50%);
}

.btn__icon {
  margin: auto;
}
/* Form style ends */

/* Result section style begins */
.result {
  padding: 3.5rem 0 0;
}

.result {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.result__paragraph {
  font-size: clamp(2.5rem, 11.7vw, 5rem);
  font-weight: var(--extra-bold);
  font-style: italic;
  color: var(--off-black);
  line-height: 1.1;
}

.result__text {
  display: inline-block;
  color: var(--purple);
}

.result__text_reveal {
  animation: result-reveal 0.35s ease;
  -webkit-animation: result-reveal 0.35s ease;
}

@keyframes result-reveal {
  from {
    transform: scale(0);
  }
  80% {
    transform: scale(1.2);
  }
  to {
    transform: scale(1);
  }
}
@-webkit-keyframes result-reveal {
  from {
    -webkit-transform: scale(0);
  }
  80% {
    -webkit-transform: scale(1.2);
  }
  to {
    -webkit-transform: scale(1);
  }
}
/* Result section style ends */

@media screen and (min-width: 425px) {
  main {
    padding: 2.75rem 3rem;
    border-radius: 1rem 1rem 10rem 1rem;
    background-color: var(--white);
  }

  .form {
    gap: 1.5rem;
    padding: 0 2rem 2.5rem 0;
  }

  .form__input-container {
    flex: 1 0 100px;
  }

  .form__input {
    font-size: clamp(1rem, 11.7vw, 2rem);
    width: 100%;
  }

  .btn {
    width: 75px;
    height: 75px;
  }

  .form__btn {
    left: calc(100% - 75px);
  }

  .result {
    padding: 2.5rem 0 0;
  }
}

@media screen and (min-width: 600px) {
  main {
    padding: 2.75rem 3rem;
    border-radius: 1rem 1rem 10rem 1rem;
    background-color: var(--white);
  }

  .form {
    padding: 0 3rem 2.5rem 0;
  }

  .form__input-container {
    flex: 0 0 128px;
  }

  .result {
    padding: 2rem 0 0;
  }
}