:root {
  color-scheme: light;
  --background: #f7f5ef;
  --surface: #fffcf6;
  --ink: #252820;
  --muted: #62675c;
  --primary: #23594f;
  --primary-strong: #19443c;
  --line: #d8ddd3;
  --soft: #e9eeea;
  --white: #ffffff;

  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: Georgia, "Times New Roman", "Songti SC", SimSun, serif;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 20px;
  --text-xl: 28px;
  --text-2xl: 44px;
  --text-hero: 64px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 80px;
  --container: 1120px;
}

* { box-sizing: border-box; }
body {
  min-width: 320px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.65;
}
main { flex: 1; }
a { color: inherit; text-underline-offset: 4px; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.025em; text-wrap: balance; }
h1, h2 { font-family: var(--font-heading); font-weight: 400; }
h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); font-weight: 600; }
p { text-wrap: pretty; }
/* The responsive container subtracts two spacing-token gutters: 24px, or 16px below 768px. */
.container { width: min(var(--container), calc(100% - var(--space-5) - var(--space-5))); margin-inline: auto; }
.skip-link {
  position: fixed;
  z-index: 20;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: 6px;
  background: var(--ink);
  color: var(--white);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-block: var(--space-3);
}
.brand { display: inline-flex; align-items: center; gap: var(--space-3); min-width: max-content; font-size: var(--text-lg); font-weight: 600; text-decoration: none; }
.mark { width: 32px; height: 32px; display: inline-block; position: relative; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
.mark::after { content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; background: var(--primary); }
.site-nav { display: flex; flex: 1; align-items: center; justify-content: center; flex-wrap: wrap; gap: var(--space-6); }
.site-nav a, .header-action { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; font-size: var(--text-sm); font-weight: 600; text-decoration: none; }
.site-nav a { color: var(--muted); }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--primary); }
.site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 8px; }
.header-action { min-width: 88px; padding-inline: var(--space-4); border: 1px solid var(--line); border-radius: 6px; color: var(--primary); }
.header-action:hover { border-color: var(--primary); background: var(--surface); }
.header-action.signed-in { background: var(--soft); border-color: var(--primary); }

.hero { padding-block: var(--space-8); }
.hero-content { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); align-items: center; gap: var(--space-7); }
.hero-copy { display: grid; gap: var(--space-5); }
.hero h1 { font-size: var(--text-hero); }
.hero-lead { max-width: 40ch; color: var(--muted); font-size: var(--text-lg); }
.hero-links { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-5); margin-top: var(--space-2); }
.hero-picture { display: block; aspect-ratio: 4 / 3; overflow: hidden; border-radius: 12px; background: var(--soft); }
.hero-picture img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: 15% center; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: var(--space-3) var(--space-5); border: 1px solid var(--primary); border-radius: 6px; font-weight: 600; text-decoration: none; }
.button.primary { background: var(--primary); color: var(--white); }
.button.primary:hover { background: var(--primary-strong); border-color: var(--primary-strong); }
.text-link, .intro-links a, .footer-inner a { color: var(--primary); font-weight: 600; }
.text-link:hover, .intro-links a:hover, .footer-inner a:hover { color: var(--primary-strong); }
.hero-links .text-link, .launcher-actions .text-link { min-height: 44px; display: inline-flex; align-items: center; }

.home-about { padding-bottom: var(--space-8); }
.section-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; gap: var(--space-8); padding-top: var(--space-7); border-top: 1px solid var(--line); }
.home-about p { max-width: 50ch; line-height: 1.75; color: var(--muted); }
.section-inner > div > p { margin-top: var(--space-4); }
.about-side { display: grid; gap: var(--space-6); }
.about-topic { display: grid; gap: var(--space-3); }
.about-topic + .about-topic { padding-top: var(--space-6); border-top: 1px solid var(--line); }

.page-content { padding-block: var(--space-8); }
.intro { max-width: 800px; }
.eyebrow { margin-bottom: var(--space-4); color: var(--primary); font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }
.intro .lead { max-width: 60ch; margin-top: var(--space-5); color: var(--muted); font-size: var(--text-lg); }
.intro-links { display: flex; flex-wrap: wrap; gap: var(--space-5); margin-top: var(--space-5); }
.content-divider { height: 1px; margin-block: var(--space-7); border: 0; background: var(--line); }
.profile-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; align-items: start; gap: var(--space-8); }
.prose { max-width: 65ch; }
.prose h2 { margin-bottom: var(--space-4); }
.prose p + p { margin-top: var(--space-5); }
.prose p { color: var(--muted); }
.prose strong { color: var(--ink); font-weight: 600; }
.section { margin-top: var(--space-7); }
.snapshot { padding-top: var(--space-5); border-top: 1px solid var(--line); }
.snapshot h2 { margin-bottom: var(--space-5); font-family: var(--font-body); font-size: var(--text-base); font-weight: 600; }
.snapshot dl { display: grid; gap: var(--space-5); margin: 0; }
.snapshot dt { margin-bottom: var(--space-2); color: var(--muted); font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.snapshot dd { margin: 0; font-size: var(--text-sm); }

.page-heading { max-width: 800px; margin-bottom: var(--space-7); }
.page-heading > p:not(.eyebrow) { margin-top: var(--space-4); color: var(--muted); }
.project-list { border-top: 1px solid var(--line); }
.project { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.5fr) 24px; align-items: start; gap: var(--space-6); padding-block: var(--space-6); border-bottom: 1px solid var(--line); color: inherit; text-decoration: none; }
.project:hover { background: var(--surface); }
.project:hover h2 { color: var(--primary); }
.project-top { display: grid; justify-items: start; gap: var(--space-3); }
.project h2 { font-family: var(--font-body); font-size: var(--text-lg); font-weight: 600; line-height: 1.3; }
.project-details { display: grid; gap: var(--space-4); }
.project p { max-width: 64ch; color: var(--muted); }
.project-arrow { display: block; width: 24px; height: 24px; align-self: center; color: var(--primary); }
.status { display: inline-flex; align-items: center; justify-self: start; min-height: 28px; padding-inline: var(--space-3); border-radius: 6px; background: var(--soft); color: var(--ink); font-size: var(--text-xs); font-weight: 600; white-space: nowrap; }
.status.ready { color: var(--primary); }
.tags { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.tag { color: var(--muted); font-size: var(--text-xs); line-height: 1.4; }
.tag + .tag { padding-left: var(--space-3); border-left: 1px solid var(--line); }
.launcher-panel { max-width: 800px; display: grid; gap: var(--space-5); padding-top: var(--space-6); border-top: 1px solid var(--line); }
.launcher-panel .eyebrow { margin: 0; }
.launcher-panel p:not(.eyebrow) { max-width: 60ch; color: var(--muted); }
.launcher-panel .access-note { font-size: var(--text-sm); }
.launcher-actions { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-5); padding-top: var(--space-2); }

.site-footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); padding-block: var(--space-5); color: var(--muted); font-size: var(--text-sm); }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 4px; }
a { transition: color 120ms ease, background-color 120ms ease, border-color 120ms ease; }

@media (max-width: 799px) {
  .header-inner { justify-content: space-between; }
  .site-nav { flex: 0 0 100%; order: 3; justify-content: flex-start; gap: var(--space-5); }
  .hero, .page-content { padding-block: var(--space-7); }
  .hero-content, .section-inner, .profile-layout { grid-template-columns: 1fr; gap: var(--space-7); }
  .hero h1 { font-size: var(--text-2xl); }
  .hero-picture { width: 100%; }
  .home-about { padding-bottom: var(--space-7); }
  .snapshot { max-width: 65ch; }
  .project { grid-template-columns: minmax(0, 1fr) 24px; gap: var(--space-4); }
  .project-top { grid-column: 1; grid-row: 1; }
  .project-details { grid-column: 1 / -1; grid-row: 2; }
  .project-arrow { grid-column: 2; grid-row: 1; align-self: start; }
}
@media (max-width: 767px) {
  .container { width: min(var(--container), calc(100% - var(--space-4) - var(--space-4))); }
}
@media (max-width: 480px) {
  .footer-inner { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { a { transition: none; } }