:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #5c5c62;
  --faint: #6e6e73;
  --rule: #e4e4e0;
  --accent: #2a3f5f;
  --accent-soft: #c9d3e1;
  --shadow: 0 1px 2px rgba(20, 24, 31, 0.04), 0 6px 20px rgba(20, 24, 31, 0.07);
  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121416;
    --surface: #1b1e22;
    --text: #ebe9e6;
    --muted: #a8a8ad;
    --faint: #97979c;
    --rule: #2a2d32;
    --accent: #a9bfdf;
    --accent-soft: #3a4a62;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 20px rgba(0, 0, 0, 0.35);
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent-soft);
}

a {
  color: var(--accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  display: inline-block;
  margin: 12px;
  padding: 8px 12px;
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
  border-radius: 6px;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 88px 24px 56px;
}

/* Header */

.site-header {
  margin-bottom: 64px;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(2.25rem, 6vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.1;
  margin: 0 0 14px;
}

.tagline {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 34em;
  margin: 0;
}

.back {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 0.15s;
}

.back:hover {
  color: var(--accent);
}

/* Categories */

.category {
  margin-bottom: 40px;
}

.category h2 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--faint);
  margin: 0 0 8px;
}

@media (min-width: 760px) {
  .category {
    display: grid;
    grid-template-columns: 8.5rem 1fr;
    column-gap: 16px;
    align-items: start;
  }

  /* Align the label with the first project's title. */
  .category h2 {
    padding-top: 21px;
    margin: 0;
  }
}

/* Project list */

.projects {
  display: flex;
  flex-direction: column;
  margin: 0 -18px;
}

.project {
  position: relative;
  display: block;
  padding: 16px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s, box-shadow 0.15s;
}

/* Hairline divider between rows, hidden around the hovered row. */
.project + .project::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 18px;
  right: 18px;
  border-top: 1px solid var(--rule);
  transition: opacity 0.15s;
}

.project:hover,
.project:focus-visible {
  background-color: var(--surface);
  border-color: var(--rule);
  box-shadow: var(--shadow);
}

.project:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 10px;
}

.project:hover::before,
.project:hover + .project::before,
.project:focus-visible::before,
.project:focus-visible + .project::before {
  opacity: 0;
}

.project-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 4px;
}

.project-title::after {
  content: "\2192";
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s, transform 0.15s;
}

.project:hover .project-title::after,
.project:focus-visible .project-title::after {
  opacity: 1;
  transform: none;
}

.project p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* Footer */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: 72px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  color: var(--faint);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

.site-footer a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 480px) {
  .container {
    padding-top: 56px;
  }

  .site-header {
    margin-bottom: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}