:root {
  /* Colors */

  /* Primary */

  --pale-blue: hsl(225, 100%, 94%);
  --bright-blue: hsl(245, 75%, 52%);
  --clr-white: hsl(0, 0%, 100%);
  --clr-black: hsl(0, 0%, 0%);

  /* Neutral */

  --very-pale-blue: hsl(225, 100%, 98%);
  --desaturated-blue: hsl(224, 23%, 55%);
  --dark-blue: hsl(223, 47%, 23%);

  /* font weights */

  --fw-500: 500;
  --fw-700: 700;
  --fw-900: 900;
  /* Space and padding */

  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 2.5rem;
}

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

body {
  font-family: "Red Hat Display", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--dark-blue);
  padding: var(--space-lg);
  background-color: hsl(0, 0%, 94%);

  @media screen and (max-width: 768px) {
    padding: unset;
    background-color: unset;
  }
}

main {
  background-image: url("../images/pattern-background-desktop.svg");
  background-repeat: no-repeat;
  background-color: var(--pale-blue);
  margin-inline: auto;
  position: relative;
  max-width: 90rem;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;

  @media screen and (max-width: 768px) {
    background-image: url("../images/pattern-background-mobile.svg");
    background-size: cover;
    background-position: center;
  }
}

section {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  max-width: 23.44rem;
  border-radius: 0.9rem;
  background-color: var(--clr-white);
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);

  @media screen and (max-width: 768px) {
    max-width: 22rem;
  }
}

article {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;

  h2 {
    font-size: 24px;
    font-weight: var(--fw-900);
    color: var(--dark-blue);
  }

  p {
    font-size: 14px;
    color: var(--desaturated-blue);
    text-align: center;
  }
}

.plan {
  display: flex;
  width: 100%;
  padding: var(--space-sm);
  align-items: center;
  justify-content: space-between;
  border-radius: 0.5rem;
  background-color: var(--very-pale-blue);

  .plan-info {
    display: flex;
    gap: var(--space-sm);
  }

  a {
    font-size: 14px;
    font-weight: var(--fw-700);
    color: var(--bright-blue);
  }

  a:active {
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.2s ease;
  }

  h3 {
    font-size: 18px;
    font-weight: var(--fw-700);
    color: var(--dark-blue);
  }
}

article button {
  width: 100%;
  padding: var(--space-xs);
  border: none;
  border-radius: 0.5rem;
  background-color: var(--bright-blue);
  color: var(--clr-white);
  font-size: 14px;
  font-weight: var(--fw-700);
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

article button:active {
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

article > a {
  text-decoration: none;
  color: var(--desaturated-blue);
  font-size: 14px;
  font-weight: var(--fw-700);
}

article > a:active {
  color: var(--dark-blue);
  font-weight: var(--fw-900);
  transition: opacity 0.2s ease;
}

footer {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  margin-top: var(--space-lg);
  font-size: 14px;
}