style.scss

// css variables
:root {
  --bg-color: #f3eee4;
  --primary-btn-color: #bb1450;
  --bg-secondary: #cec5c5;
  --bg-white: #fff;
  --color-gray: #8c97b7;
  --color-blue: #1c38f1;
  --color-green: #1fcdb0;
  --color-red: #e72f2f;
  --input-height: 3rem;
  --transition-duration: 0.3s;
  --transition-easing: cubic-bezier(0.5, 0, 0.5, 1);
  --animation-duration: 0.8s;
  --btn-color: var(--color-gray);
}

// css reset line 17 - 71
/* Box sizing rules */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default margin */
body,
h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

/* Remove list styles on ul, ol elements with a list role, which suggests default styling will be removed */
ul[role="list"],
ol[role="list"] {
  list-style: none;
}

/* Set core root defaults */
html:focus-within {
  scroll-behavior: smooth;
}

/* Set core body defaults */
body {
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  line-height: 1.5;
}

/* A elements that don't have a class get default styles */
a:not([class]) {
  text-decoration-skip-ink: auto;
}

/* Make images easier to work with */
img,
picture {
  max-width: 100%;
  display: block;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
  font: inherit;
}

/* Remove all animations, transitions and smooth scroll for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.container {
  max-width: 1100px;
  width: 90%;
}

.main {
  background-color: var(--bg-color);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.col {
  flex-direction: column;
}

.form {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 600px;
  background-color: var(--bg-white);
  box-shadow: 0 0.5rem 1rem #0003;

  --color: var(--color-gray);

  &:focus-within {
    --btn-color: var(--color-blue);
  }
  &:valid {
    --btn-color: var(--color-green);
  }
}

.form-input {
  &:focus-within {
    --color: var(--color-blue);
  }
  &:invalid {
    --color: var(--color-red);
  }
  &:valid:focus-within {
    --color: var(--color-green);
  }
  &:default {
    --color: var(--color-gray);
  }
  margin-bottom: 10px;
  padding: 0 1rem;
  height: var(--input-height);
  border: 2px solid var(--color);
  outline: none;
  border-radius: 0.25rem;
  transition-property: border;
  transition-duration: 0.4s;
  transition-timing-function: ease;
}

.btn {
  grid-area: button;
  border: none;
  padding: 0 1rem;
  color: white;
  font-weight: bold;
  border-radius: 0.25rem;
  height: var(--input-height);
  background-color: var(--btn-color);
  margin-left: -40px;
  transform: translateX(20px);
  cursor: pointer;
}

.btn:active {
  box-shadow: 0 0.5rem 1rem #0003;
}

// .error__msg {
//   color: var(--color-red);
// }