:root {
  --bg: #fdfdfc;
  --bg-alt: #f4f4f2;
  --text: #1c1e21;
  --muted: #5b6168;
  --accent: #0a7d4f;
  --border: #e2e2df;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --bg-alt: #1c1f24;
    --text: #e8e8e6;
    --muted: #9aa1a9;
    --accent: #3ecf8e;
    --border: #2a2e34;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */

.site-header {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.site-header nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.8rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.brand {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text);
}
.brand:hover { text-decoration: none; color: var(--accent); }
.prompt { color: var(--accent); font-weight: 700; }

.nav-links { display: flex; gap: 1.1rem; }
.nav-links a { color: var(--muted); font-size: 0.9rem; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* Layout */

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

section { padding-top: 3rem; }

h1 { font-size: 2.4rem; letter-spacing: -0.02em; }

h2 {
  font-size: 1.35rem;
  margin-bottom: 1.2rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}
h2.more { margin-top: 2.5rem; }

/* Hero */

.hero { padding-top: 4.5rem; }
.tagline {
  font-family: var(--mono);
  color: var(--accent);
  margin: 0.4rem 0 1rem;
}
.intro { font-size: 1.1rem; }
.facts { margin-top: 1rem; color: var(--muted); font-size: 0.92rem; }

/* Project cards on the homepage */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem;
  margin-bottom: 1.1rem;
}
.card-grid .card { margin-bottom: 0; }

.card {
  position: relative;
  display: block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.4rem;
  margin-bottom: 1.1rem;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin-bottom: 0.9rem;
}
/* Pill pinned to the top-right corner of a card's thumbnail, for cards whose
   project can be played live on the site. */
.play-badge {
  position: absolute;
  top: 1.9rem;
  right: 2.05rem;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
}

.card:hover {
  text-decoration: none;
  border-color: var(--accent);
  transform: translateY(-2px);
}
.card h3 { font-size: 1.1rem; }
.card .arrow { color: var(--accent); font-weight: 700; }
.card:hover h3 { color: var(--accent); }

.stack {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0.25rem 0 0.7rem;
}
.card p:last-child { font-size: 0.95rem; }

/* Supporting projects list */

.project-list { list-style: none; }
.project-list li {
  border-bottom: 1px solid var(--border);
}
.project-list li:last-child { border-bottom: none; }
.project-list a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  color: var(--text);
}
.project-list a:hover { text-decoration: none; color: var(--accent); }
.project-list .name { font-weight: 600; }
.project-list .blurb { color: var(--muted); font-size: 0.9rem; text-align: right; }

/* Skills / about / contact */

#about p + p { margin-top: 0.8rem; }

/* Project page */

.back-link {
  display: inline-block;
  margin-top: 3.5rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
}
.back-link:hover { color: var(--accent); text-decoration: none; }

.project-head { padding-top: 3.5rem; }
.project-head h1 { font-size: 2rem; }

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
}
.btn:hover { background: var(--accent); color: var(--bg); text-decoration: none; }

.prose { margin-top: 2rem; }
.prose p { margin-bottom: 1rem; }
.prose h2 { font-size: 1.1rem; margin-top: 2.6rem; margin-bottom: 0.5rem; }
.prose ul { margin: 0.5rem 0 1rem 1.2rem; }
.prose li { margin-bottom: 0.4rem; }

.lede {
  font-size: 1.1rem;
  color: var(--muted);
  margin-top: 0.6rem;
}

.demo {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin: 1.5rem auto 0.4rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #101014;
}

.shot {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.5rem auto 0.4rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.shot + .shot { margin-top: 0.75rem; }
.caption {
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
  margin-bottom: 1rem;
}

.diagram {
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  white-space: pre;
}

.skills { margin-top: 1.5rem; }
.skill-group { margin-bottom: 1.1rem; }
.skill-group .label {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.45rem;
}
.tag {
  display: inline-block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
  margin: 0 0.35rem 0.4rem 0;
  font-family: var(--mono);
  font-size: 0.82rem;
}
.langs {
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.langs strong { color: var(--text); font-weight: 600; }

#about h3 {
  font-size: 1rem;
  margin-top: 2.6rem;
  margin-bottom: 1rem;
}
#about > p { margin-bottom: 1.2rem; }
.skills { margin-bottom: 0.5rem; }

.footer-back {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}

/* Footer */

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem 2.5rem;
}
footer p {
  max-width: 1080px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 0.85rem;
}

/* 404 */

.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  font-family: var(--mono);
}

@media (max-width: 600px) {
  .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  h1 { font-size: 1.9rem; }
  .nav-links { gap: 0.8rem; }
  .project-list .blurb { display: none; }
}