/* Custom properties */
:root {
  --color-red: hsl(0, 100%, 74%);
  --color-green: hsl(154, 59%, 51%);
  --color-blue: hsl(248, 32%, 49%);
  --color-dark-blue: hsl(249, 10%, 26%);
  --color-grayish-blue: hsl(246, 25%, 77%);
  --color-white: hsl(0, 0%, 100%);
  --color-black: hsl(0, 0%, 0%);

  --size-1: clamp(0.7rem, 0.66rem + 0.2vw, 0.8rem);
  --size-2: clamp(0.88rem, 0.83rem + 0.24vw, 1rem);
  --size-3: clamp(1.09rem, 1rem + 0.47vw, 1.33rem);
  --size-4: clamp(1.37rem, 1.21rem + 0.8vw, 1.78rem);
  --size-5: clamp(1.71rem, 1.45rem + 1.29vw, 2.37rem);
  --size-6: clamp(2.14rem, 1.74rem + 1.99vw, 3.16rem);
  --size-7: clamp(2.67rem, 2.07rem + 3vw, 4.21rem);
  --size-8: clamp(3.34rem, 2.45rem + 4.43vw, 5.61rem);

  --size-header-1: 20ch;
  --size-header-2: 25ch;
  --size-header-3: 35ch;

  --size-content-1: 20ch;
  --size-content-2: 45ch;
  --size-content-3: 60ch;
}

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

body {
  font-family: 'Poppins', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeSpeed;
  line-height: 1.5;
  min-block-size: 100vh;
  display: grid;
  place-items: center;
  background-color: var(--color-red);
  background-image: url('../assets/images/image-bg-intro-mobile.png');
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

h1,
p {
  color: var(--color-white);
}

h1 {
  font-size: var(--size-4);
  line-height: 1.25;
  margin-block-end: var(--size-2);
}

p {
  font-size: calc(var(--size-2) - 0.15rem);
}

a {
  text-decoration: none;
}

i {
  display: none !important;
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
}

small {
  font-size: calc(var(--size-1) - 0.15rem);
  font-weight: 500;
  display: none;
  margin-block-start: calc(var(--size-1) - 0.5rem);
  color: var(--color-red);
}

input,
button {
  font-family: inherit;
  line-height: inherit;
  inline-size: 100%;
  border-radius: 0.25rem;
}

input::placeholder {
  font-size: var(--size-1);
  font-weight: 500;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Icons styles */
.icon-check {
  color: var(--color-green);
}

.icon-error {
  color: var(--color-red);
}

/* Components styles */
.form-control {
  font-size: var(--size-1);
  display: block;
  padding: 0.65rem 1rem;
  border: 1px solid var(--color-grayish-blue);
}

.submit-button {
  font-size: calc(var(--size-2) - 0.25rem);
  font-weight: 600;
  text-transform: uppercase;
  padding: var(--size-2) var(--size-3);
  box-shadow: inset 0px -4px 0px rgba(0, 0, 0, 0.09);
  appearance: none;
  border: none;
  user-select: none;
  touch-action: manipulation;
  transition: all 500ms ease;
  cursor: pointer;
  background-color: var(--color-green);
  color: var(--color-white);
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

.submit-button:hover {
  opacity: 0.9;
}

:where(button, input, a):where(:not(:active)):focus-visible {
  outline: 2px solid var(--color-black);
}

/* Layout styles */
.container {
  padding-inline: var(--size-1);
  padding-block: var(--size-4);
  margin-inline: auto;
}

.main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--size-6);
}

.section-intro {
  max-inline-size: var(--size-header-2);
  text-align: center;
}

.section-form {
  max-inline-size: min(90vw, var(--size-content-2));
}

/* Form styles */
.subscription-info {
  font-size: calc(var(--size-1) - 0.05rem);
  text-align: center;
  padding: var(--size-2) var(--size-3);
  border-radius: 0.25rem;
  background-color: var(--color-blue);
  color: var(--color-white);
}

.subscription-info span {
  font-weight: 700;
}

.form {
  padding: var(--size-2);
  margin-block-start: var(--size-1);
  border-radius: 0.25rem;
  background-color: var(--color-white);
}

.form-group {
  position: relative;
  margin-block: var(--size-1);
}

.form-paragraph {
  font-size: calc(var(--size-1) - 0.15rem);
  text-align: center;
  max-inline-size: var(--size-content-2);
  margin-block-start: var(--size-1);
  color: var(--color-grayish-blue);
}

.form-paragraph a {
  font-weight: 600;
  color: var(--color-red);
}

/* Form validation styles */
.form-group.check .icon-check {
  display: block !important;
}

.form-group.error .icon-error {
  display: block !important;
}

.form-group.error small {
  display: flex;
  justify-content: flex-end;
}

/* Responsiveness */
@media screen and (min-width: 22.5rem) {
  .container {
    padding-inline: var(--size-2);
  }
}

@media screen and (min-width: 30rem) {
  body {
    background-image: url('../assets/images/image-bg-intro-desktop.png');
  }

  .container {
    padding-inline: var(--size-3);
  }
}

@media screen and (min-width: 48rem) {
  .container {
    max-inline-size: 45.125rem;
  }

  .section-intro {
    max-inline-size: var(--size-header-3);
  }
}

@media screen and (min-width: 62rem) {
  h1 {
    font-size: var(--size-5);
  }

  p {
    font-size: calc(var(--size-2) - 0.15rem);
  }

  .container {
    max-inline-size: 60rem;
    padding-block: 0;
  }

  .main {
    flex-direction: row;
  }

  .section-intro {
    text-align: left;
  }
}

@media screen and (min-width: 80rem) {
  .container {
    max-inline-size: 71.25rem;
  }
}

@media screen and (min-width: 96rem) {
  .container {
    max-inline-size: 92.5rem;
  }
}