:root {
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-text: #656565;
  --color-heading: #333333;
  --color-logo: #222222;
  --color-accent: #eb3000;
  --color-border: #e9e9e9;
  --color-footer-text: #f8f8f8;
  --color-footer-muted: #f5f5f5;
  --font-serif: Palatino Linotype, Georgia, Garamond, Times, Times New Roman, serif;
  --max-width: 72rem;
  --header-height: 6.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-serif);
  font-size: 0.875rem;
  font-weight: 300;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-accent);
  opacity: 0.85;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 1rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--color-logo);
  text-decoration: none;
}

.logo span {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.375rem;
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  cursor: pointer;
}

.nav-toggle:hover {
  background: var(--color-bg);
}

.nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav a {
  display: block;
  padding: 0.35rem 0;
  color: var(--color-heading);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 700;
  transition: color 0.3s ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--color-accent);
}

/* Main layout */

main {
  flex: 1;
  padding-block: 2.5rem 3rem;
}

.page-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 48rem) {
  .page-grid {
    grid-template-columns: minmax(12rem, 1fr) minmax(0, 2fr);
    gap: 3rem;
  }
}

.hero-image img {
  display: block;
}

.content {
  max-width: 42rem;
}

.content h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 3vw, 1.25rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-heading);
}

.content p {
  margin: 0 0 1rem;
}

.content p:last-child {
  margin-bottom: 0;
}

.content .attribution {
  margin-top: 1.5rem;
  color: var(--color-text);
  font-style: italic;
}

.content .links {
  margin-top: 0.5rem;
}

/* Footer */

.site-footer {
  margin-top: auto;
  background: var(--color-accent);
  color: var(--color-footer-text);
}

.footer-inner {
  padding-block: 3.125rem 2rem;
}

.footer-inner h2 {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-footer-text);
}

.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links li + li {
  margin-top: 0.35rem;
}

.footer-links a {
  color: var(--color-footer-text);
  text-decoration: none;
}

.footer-links a:hover {
  color: #eeeeee;
}

.footer-bottom {
  padding-block: 1rem 1.5rem;
  font-size: 0.75rem;
  color: var(--color-footer-muted);
  background: var(--color-accent);
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom a {
  color: var(--color-footer-text);
}

.footer-bottom a:hover {
  color: #eeeeee;
}

/* Mobile nav */

@media (max-width: 47.99rem) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 1rem 1rem;
    display: none;
  }

  .nav.is-open {
    display: block;
  }

  .nav ul {
    flex-direction: column;
    gap: 0;
  }

  .nav a {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav li:last-child a {
    border-bottom: none;
  }

  .site-header .container {
    position: relative;
    flex-wrap: wrap;
  }
}

/* 404 */

.error-page {
  text-align: center;
  padding-block: 4rem;
}

.error-page h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

.error-page p {
  color: var(--color-text);
  margin: 0 0 1.5rem;
}

.error-page a {
  font-weight: 500;
}