:root {
  --scale: 1.333;
  --base: 0.875rem;
  --s1: calc(var(--base) * var(--scale));
  --s2: calc(var(--s1) * var(--scale));
  --s3: calc(var(--s2) * var(--scale));
  --s-1: calc(var(--base) / var(--scale));
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --serif: 'IBM Plex Serif', Georgia, serif;
  --mono: 'IBM Plex Mono', monospace;
  --measure: 60ch;
  --leading: 1.5;
  --leading-tight: 1.2;
  --gap: 0.75rem;
  --page-max: 1080px;
}

html[data-theme='dark'] {
  --bg: #0c1017;
  --surface: #151a24;
  --surface-alt: #1b2230;
  --border: #28323f;
  --text: #d3d7de;
  --text-muted: #74808b;
  --accent: #74d5a0;
  --status-live: #74d5a0;
  --status-build: #caa15b;
  --status-research: #7ea8ff;
  --status-ops: #b78de7;
}

html[data-theme='paper'] {
  --bg: #ebe5da;
  --surface: #e1dacd;
  --surface-alt: #d6d0c3;
  --border: #bfb4a4;
  --text: #25313a;
  --text-muted: #596268;
  --accent: #245d45;
  --status-live: #245d45;
  --status-build: #866631;
  --status-research: #2f548f;
  --status-ops: #68408f;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: var(--base);
  line-height: var(--leading);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}

::selection {
  background: rgba(48, 118, 84, 0.15);
}

html[data-theme='dark'] ::selection {
  background: rgba(116, 213, 160, 0.15);
}

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

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 1.5rem;
}

.site-header,
.card,
.site-footer {
  background: var(--surface);
  border: 1px solid var(--border);
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  margin-bottom: var(--gap);
}

.header-block {
  display: grid;
  gap: 0.2rem;
}

h1,
h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: var(--leading-tight);
}

h1 {
  font-size: var(--s1);
}

h2 {
  font-size: var(--s1);
  margin-bottom: 0.75rem;
}

h3 {
  margin: 0 0 0.25rem;
  font-size: var(--base);
  font-weight: 600;
  line-height: var(--leading-tight);
}

.tagline,
.card-label,
.nav-link,
.status-text,
.tech,
.summary-list,
.detail-list,
.inline-link,
.theme-toggle,
.site-footer,
.site-footer-links,
.back-link,
.breadcrumb,
.footer-link-label {
  font-family: var(--mono);
  font-size: var(--s-1);
  font-variant-numeric: tabular-nums;
}

.tagline,
.body-copy,
.card p,
.summary-list li,
.detail-list li,
.site-footer-note,
.contact-text {
  color: var(--text-muted);
}

.tagline {
  margin: 0.25rem 0 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.main-nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--text-muted);
  padding: 0.5rem 0.75rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--accent);
  text-decoration: none;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text);
  cursor: pointer;
  min-height: 44px;
  padding: 0.65rem 0.9rem;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.bento {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
}

.card {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
}

.card.wide {
  grid-column: 1 / -1;
}

.card-label {
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card p,
.body-copy,
.contact-text {
  max-width: var(--measure);
  margin: 0 0 0.75rem;
}

.card p:last-child,
.body-copy:last-child,
.contact-text:last-child {
  margin-bottom: 0;
}

.hero-title {
  font-size: var(--s2);
  max-width: 20ch;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
  margin-top: 0.42rem;
}

.status-dot.live {
  background: var(--status-live);
}

.status-dot.build {
  background: var(--status-build);
}

.status-dot.research {
  background: var(--status-research);
}

.status-dot.ops {
  background: var(--status-ops);
}

.project-entry {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
}

.project-entry:first-of-type {
  padding-top: 0;
}

.project-entry:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.project-title {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.status-text,
.meta,
.tech,
.breadcrumb {
  color: var(--text-muted);
  text-transform: uppercase;
}

.status-text,
.meta {
  margin-bottom: 0.45rem;
}

.tech,
.site-footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.tech {
  margin-top: 0.55rem;
}

.inline-link,
.back-link {
  color: var(--accent);
}

.inline-link::after,
.back-link::after {
  content: ' ->';
}

.summary-list,
.detail-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.summary-list li,
.detail-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.summary-list li:last-child,
.detail-list li:last-child {
  border-bottom: none;
}

.summary-list strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--text);
}

.contact-links,
.footer-contact-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.contact-links a,
.footer-contact-links a,
.back-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.site-footer {
  margin-top: var(--gap);
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer-links {
  align-items: center;
}

.site-footer-note,
.site-footer-mark {
  color: var(--text-muted);
}

.site-footer-mark {
  white-space: nowrap;
}

@media (max-width: 768px) {
  .page {
    padding: 0.75rem;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    justify-content: flex-start;
  }

  .bento {
    grid-template-columns: 1fr;
  }

  .hero-title {
    max-width: none;
  }
}