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

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;

  color: var(--color-text);
  background:
    radial-gradient(
      circle at top,
      rgba(150, 87, 191, 0.1),
      transparent 34rem
    ),
    var(--color-background);

  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;

  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.modal-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

main {
  width: 100%;
}

.page-shell {
  width: min(
    calc(100% - 32px),
    var(--page-width)
  );

  margin-inline: auto;
  padding: 24px 0 28px;
  text-align: center;
}

.page-shell--inner {
  min-height: calc(100vh - 90px);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;

  padding: 10px 16px;

  color: var(--color-white);
  background: var(--color-purple-dark);

  border-radius: var(--radius-pill);

  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;

  transform: translateY(-180%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;

  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;

  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;

  border: 0;
}

.site-footer {
  width: min(
    calc(100% - 32px),
    var(--page-width)
  );

  margin: 0 auto;
  padding: 20px 0 30px;

  color: var(--color-muted);
  font-size: 0.8rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;

  margin-bottom: 28px;
  padding: 9px 16px;

  color: var(--color-purple-dark);
  background: var(--color-purple-soft);

  border: 1px solid var(--color-purple-border);
  border-radius: var(--radius-pill);

  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;

  transition:
    transform var(--transition-fast),
    background var(--transition-fast);
}

.back-link:hover {
  transform: translateY(-1px);
  background: rgba(150, 87, 191, 0.19);
}

.back-link:focus-visible {
  outline: 3px solid var(--color-purple-soft);
  outline-offset: 4px;
}