index.css

/* --------------- */
/* CUSTOM PROPERTIES */
/* --------------- */

:root {
  /* font-families */
  --ff-sans-serif: "Poppins", sans-serif;

  /* font-weight */
  --fw-regular: 400;
  --fw-bold: 700;
  --fw-extra-bold: 800;

  /* colors */
  --clr-purple: 259, 100%, 65%;
  --clr-light-red: 0, 100%, 67%;
  --clr-white: 0, 0%, 100%;
  --clr-off-white: 0, 0%, 94%;
  --clr-light-grey: 0, 0%, 86%;
  --clr-smokey-grey: 0, 1%, 44%;
  --clr-off-black: 0, 0%, 8%;
}

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

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

/* Reset margins */
body,
h1,
h2,
h3,
h4,
h5,
p,
figure,
picture {
  margin: 0;
}

/* images */
img,
picture {
  max-width: 100%;
}

/* form elements */
input,
button,
textarea,
select {
  font: inherit;
}

/* button*/
button {
  cursor: pointer;
}

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

/* remove animations for people who've turned them off */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------- */
/* UTILITY CLASSES */
/* --------------- */

.flex {
  display: flex;
  gap: var(--gap, 1rem);
}

/* typography */
.ff-san-serif {
  font-family: var(--ff-sans-serif);
}

.fw-regular {
  font-weight: var(--fw-regular);
}
.fw-bold {
  font-weight: var(--fw-bold);
}
.fw-extra-bold {
  font-weight: var(--fw-extra-bold);
}

.italic {
  font-style: italic;
}

.letter-spacing-4 {
  letter-spacing: 4px;
}

.uppercase {
  text-transform: uppercase;
}

/* colors */
.bg-purple {
  background-color: hsl(var(--clr-purple));
}
.bg-light-red {
  background-color: hsl(var(--clr-light-red));
}
.bg-white {
  background-color: hsl(var(--clr-white));
}
.bg-off-white {
  background-color: hsl(var(--clr-off-white));
}
.bg-light-grey {
  background-color: hsl(var(--clr-light-grey));
}
.bg-smokey-grey {
  background-color: hsl(var(--clr-smokey-grey));
}
.bg-off-black {
  background-color: hsl(var(--clr-off-black));
}

.text-purple {
  color: hsl(var(--clr-purple));
}
.text-light-red {
  color: hsl(var(--clr-light-red));
}
.text-white {
  color: hsl(var(--clr-white));
}
.text-off-white {
  color: hsl(var(--clr-off-white));
}
.text-light-grey {
  color: hsl(var(--clr-light-grey));
}
.text-smokey-grey {
  color: hsl(var(--clr-smokey-grey));
}
.text-off-black {
  color: hsl(var(--clr-off-black));
}

/* --------------- */

body {
  font-family: var(--ff-sans-serif);
  min-height: 100dvh;
  justify-content: center;
}

main {
  align-items: center;
}

input {
  font-size: 24px;
  width: clamp(6rem, 25vw, 9rem);
  height: 4rem;
  padding: 1.2rem 0.75rem;
  border-radius: 0.5rem;
  border: 2px solid hsl(var(--clr-light-grey));
  caret-color: hsl(var(--clr-purple));
}

input:focus {
  outline: none;
  border-color: hsl(var(--clr-purple));
}

.container {
  border-radius: 1.75rem 1.75rem 5rem;
  margin: 0 auto;
  padding: 3rem 1rem;
  width: clamp(350px, 95vw, 750px);
  max-height: 90vh;
}

.input-container {
  flex-direction: column;
  --gap: 0.5rem;
}

.all-inputs-container {
  width: 100%;
  justify-content: flex-start;
  gap: clamp(1rem, 5vw, 2rem);
}

form {
  flex-direction: column;
  align-items: center;
  position: relative;
}

button {
  border: none;
  border-radius: 50%;
  padding: 0 1rem;
  aspect-ratio: 1/1;
  z-index: 2;
  background-color: hsl(var(--clr-purple));
  align-items: center;
}

button:hover {
  background-color: hsl(var(--clr-off-black));
}

.submit-icon {
  width: 1.75rem;
}

.line {
  display: block;
  width: 100%;
  background-color: hsl(var(--clr-light-grey));
  height: 1px;
  position: absolute;
  bottom: 1.85rem;
  z-index: 1;
}

.invalidInput,
.invalidInput:focus {
  border-color: hsl(var(--clr-light-red));
}

.invalidLabel {
  color: hsl(var(--clr-light-red));
}

.error-text {
  font-size: 12px;
  min-height: 37px;
  visibility: hidden;
}

.age-section h1 {
  font-size: 3.5rem;
}

.age-section h1:first-child {
  position: relative;
  top: 1.5rem;
}

.age-section h1:last-child {
  position: relative;
  top: -1.5rem;
}

@media (hover: hover) {
  input:hover {
    border-color: hsl(var(--clr-purple));
  }
}

/* Tablet layout */
@media (min-width: 480px) {
  .container {
    padding: 3rem clamp(1.5rem, 5vw, 3rem);
    border-bottom-right-radius: 7.5rem;
  }

  button {
    padding: 0 1.25rem;
    align-self: end;
    position: absolute;
    bottom: -3.5rem;
  }

  .age-section {
    margin-top: 2rem;
  }

  .age-section h1 {
    font-size: 4.5rem;
  }

  .line {
    bottom: -1.5rem;
  }
}
/* Desktop layout */
@media (min-width: 768px) {
  .container {
    padding: 3rem 3.5rem;
    border-bottom-right-radius: 10rem;
  }
  button {
    padding: 0 1.5rem;
  }
  .submit-icon {
    width: 2.25rem;
  }
  .age-section h1 {
    font-size: 5rem;
  }
  .line {
    bottom: -1rem;
  }
}