html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

main {
  width: 100%;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* HEADER */
#header {
  position: sticky;
  top: 0;
  z-index: 1000;

  background-color: transparent;
  border-bottom: 1px solid transparent;

  transition:
    background-color 0.28s ease,
    border-color 0.28s ease,
    backdrop-filter 0.28s ease,
    box-shadow 0.28s ease;
}

#header.scrolled {
  background:
    linear-gradient(to bottom,
      rgba(18, 18, 18, 0.32),
      rgba(18, 18, 18, 0.12));

  border-bottom: 1px solid rgba(246, 241, 235, 0.08);

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);

  padding: 0.25rem 0;

  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.08);
}

.site-footer {
  padding: 1rem var(--spacing-md);
  background-color: var(--color-text);
  text-align: center;
}

.site-footer__trigger {
  border: 0;
  padding: 0;

  background: transparent;

  color: white;

  cursor: pointer;

  font: inherit;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;

  transition:
    color var(--transition-fast),
    opacity var(--transition-fast);
}

.site-footer__trigger:hover,
.site-footer__trigger:focus-visible {
  color: rgba(246, 241, 235, 0.9);
}