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

:root {
  --ff-main: "Red Hat Display", sans-serif;
  --fs-sm: 0.938rem;
  --fs-md: 1rem;
  --fs-lg: 1.75rem;
  --fw-sm: 500;
  --fw-md: 700;
  --fw-lg: 900;

  --font-main: var(--ff-main);

  --text-size-title: var(--fs-lg);
  --text-size-body: var(--fs-md);
  --text-size-small: var(--fs-sm);

  --weight-title: var(--fw-lg);
  --weight-body: var(--fw-md);
  --weight-caption: var(--fw-sm);

  --blue-50: hsl(225, 100%, 98%);
  --blue-100: hsl(225, 100%, 94%);
  --blue-700: hsl(245, 75%, 52%);
  --blue-950: hsl(223, 47%, 23%);
  --gray-600: hsl(224, 23%, 45%);
  --white: hsl(0, 0%, 100%);

  --brand-primary: var(--blue-100);
  --brand-secondary: var(--blue-700);

  --bg-body: var(--blue-100);
  --bg-card: var(--white);

  --text-main: var(--blue-950);
  --text-description: var(--gray-600);
  --text-content: var(--blue-50);

  --sp-sm: 0.5rem;
  --sp-md: 1rem;
  --sp-lg: 1.5rem;
  --sp-xl: 2rem;
  --sp-x2: 3rem;
  --sp-x3: 5rem;
  --btn-padding-y: var(--sp-md);
  --btn-padding-x: var(--sp-x3);
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-body);
  font-family: var(--font-main);
}

main {
  display: flex;
  max-width: 768px;
  width: 100%;
  height: auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sp-md);
  margin-top: var(--sp-xl);
}

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 375px;
  background-color: var(--bg-card);
  gap: var(--sp-md);
  height: auto;
  border-radius: 1.5rem;
  box-shadow: 0 2rem 4rem 0rem rgba(0, 0, 0, 0.1);
}

.card__img--illustration-hero {
  width: 100%;
  height: auto;
  border-radius: 1.5rem 1.5rem 0 0;
}

.card__content {
  display: flex;
  flex-direction: column;
  text-align: center;
  gap: var(--sp-md);
  padding: var(--sp-md);
}

.card__content--title {
  font-size: var(--text-size-title);
  font-weight: var(--weight-title);
  color: var(--text-main);
}

.card__content--description {
  font-size: var(--text-size-body);
  font-weight: var(--weight-body);
  color: var(--text-description);
  line-height: 1.75rem;
}

.card__plan {
  font-size: var(--text-size-body);
  display: flex;
  flex-direction: row;
  width: auto;
  text-align: center;
  align-items: center;
  gap: var(--sp-xl);
  padding: var(--sp-md);
  background-color: var(--blue-50);
  border-radius: var(--sp-md);
}

.card__plan--annual {
  display: flex;
  flex-direction: column;
  font-weight: var(--weight-body);
  color: var(--text-main);
  gap: 0.25rem;
}

.card__plan--change-plan a {
  display: flex;
  flex-direction: row;
  padding: var(--sp-md);
  font-weight: var(--weight-title);
  color: var(--blue-700);

  font-size: var(--text-size-small);
}

.u-text-gray {
  color: var(--gray-600);
}

.card__buttons {
  display: flex;
  flex-direction: column;
  text-align: center;
  align-items: center;
  gap: var(--sp-sm);
  padding: var(--sp-md);
}
.btn {
  font-size: var(--text-size-small);
  font-weight: var(--weight-title);
  font-family: var(--font-main);
  border: none;
  border-radius: var(--sp-md);
  padding: var(--btn-padding-y) var(--btn-padding-x);
}

.btn--proceed {
  color: var(--blue-50);
  background-color: var(--blue-700);
  box-shadow: 0rem 1rem 0.75rem rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
}

.btn--cancel {
  color: var(--gray-600);
  transition: all 0.2s ease;
  background-color: transparent;
}

.card__plan--change-plan a {
  transition: all 0.2s ease;
}

.card__plan--change-plan a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--blue-700);
  outline-offset: 2px;
}

.card__plan--change-plan a:hover {
  text-decoration: none;
  cursor: pointer;
  color: hsla(245, 75%, 52%, 0.73);
}

.btn--proceed:hover {
  cursor: pointer;
  background-color: hsla(245, 75%, 52%, 0.73);
}

.btn--cancel:hover {
  cursor: pointer;

  color: var(--blue-950);
}

@media (min-width: 768px) {
  main {
    max-width: 1440px;
    width: 100%;
    min-height: 100vh;
    display: grid;
    place-items: center;
    margin: 0;
    padding: 0;
  }
}

/* ========================================
   ACESSIBILIDADE: Skip link
   ======================================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--blue-700);
  color: var(--white);
  padding: var(--sp-sm) var(--sp-md);
  border-radius: 0.5rem;
  font-weight: var(--fw-md);
  text-decoration: none;
  z-index: 1000;
}
.skip-link:focus {
  top: var(--sp-md);
  outline: 2px solid var(--white);
  outline-offset: 2px;
}

/* ========================================
   ACESSIBILIDADE: Respeitar preferência por movimento reduzido
   ======================================== */
@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;
  }

  html {
    scroll-behavior: auto !important;
  }

  .btn--proceed,
  .btn--cancel,
  .card__plan--change-plan a {
    transition: none !important;
  }
}