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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--color-ink);
}

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

a {
  color: inherit;
}

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

:focus-visible {
  outline: 2px solid var(--color-terracotta);
  outline-offset: 3px;
}

.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;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out-expo),
    background-color var(--duration-fast) var(--ease-out-expo);
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--color-terracotta);
  color: var(--color-paper);
}

.button--primary:hover {
  background: #d4754f;
}

.button--on-paper {
  background: var(--color-ink);
  color: var(--color-paper);
}

.button--on-paper:hover {
  background: #1c2028;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Site header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(245, 243, 237, 0.1);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: var(--space-xs);
}

.site-header__brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--color-paper);
  text-decoration: none;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-header__link {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out-expo);
}

.site-header__link:hover,
.site-header__link:focus-visible {
  color: var(--color-paper);
}

.site-header__link.is-active {
  color: var(--color-terracotta);
}

.site-header__link.is-active::before {
  content: "[ ";
}

.site-header__link.is-active::after {
  content: " ]";
}

.site-header__cta {
  padding: 0.5rem 1.125rem;
  font-size: 0.875rem;
}

@media (max-width: 30rem) {
  .site-header__nav {
    gap: var(--space-sm);
  }

  .site-header__cta {
    display: none;
  }
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
  justify-content: space-between;
  width: 100%;
}