:root {
  color-scheme: light dark;
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-soft: #eef2f8;
  --text: #16181c;
  --muted: #595f69;
  --border: #cbd0d8;
  --accent: #244a9b;
  --accent-contrast: #ffffff;
  --focus: #ffbf47;
  --max-width: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101216;
    --surface: #181b21;
    --surface-soft: #20252e;
    --text: #f5f6f8;
    --muted: #c3c8d0;
    --border: #4a505a;
    --accent: #a9c0ff;
    --accent-contrast: #101726;
    --focus: #ffd166;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 0.14em; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
iframe:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

button,
input { font: inherit; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -6rem;
  z-index: 1000;
  padding: .75rem 1rem;
  border: 2px solid currentColor;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
}
.skip-link:focus { top: 1rem; }

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

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1rem;
}

.brand {
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 800;
  text-decoration-thickness: .15em;
}

.hero { padding-block: 5rem 3.5rem; }

.hero h1,
.page-head h1,
.article-page h1 {
  margin: .25rem 0 1rem;
  font-size: clamp(2.1rem, 7vw, 4rem);
  line-height: 1.08;
  letter-spacing: -.035em;
}

.lead {
  max-width: 64ch;
  font-size: 1.24rem;
}

.eyebrow {
  margin-bottom: .35rem;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.page-shell { padding-bottom: 5rem; }
.page-head { padding-block: 3.5rem 2.5rem; }

.section {
  padding-block: 3rem;
  border-top: 1px solid var(--border);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}
.section-heading h2 { margin: 0; }

.section-copy,
.card-meta,
.article-meta,
.status,
.ai-note { color: var(--muted); }

.card,
.audio-box,
.note,
.ai-panel,
.references,
.work-card,
.portal-card {
  border: 1px solid var(--border);
  border-radius: .85rem;
  background: var(--surface);
  padding: 1.35rem;
}

.card h2,
.card h3,
.portal-card h2,
.portal-card h3,
.work-card h3 {
  margin: .2rem 0 .7rem;
  line-height: 1.25;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.portal-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.portal-card p:last-child { margin-bottom: 0; }
.portal-card .card-link { margin-top: auto; padding-top: .6rem; font-weight: 750; }
.compact-grid { margin-top: 1rem; }

.home-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, .8fr);
  gap: 1rem;
  align-items: start;
}

.home-latest { min-width: 0; }
.quick-links ul { margin: .6rem 0 0; padding-left: 1.25rem; }
.quick-links li + li { margin-top: .5rem; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-block: 1.25rem;
}

.button,
.search-form button {
  display: inline-block;
  padding: .7rem 1rem;
  border: 2px solid var(--accent);
  border-radius: .55rem;
  background: var(--accent);
  color: var(--accent-contrast);
  font: inherit;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
}

.portfolio-group { margin-top: 2rem; }
.portfolio-group h2,
.portfolio-group h3 { margin-bottom: 1rem; }

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.work-card { min-width: 0; }
.work-card p:last-child { margin-bottom: 0; }
.featured-work { grid-column: 1 / -1; }

.video-frame {
  position: relative;
  width: 100%;
  margin-block: 1rem;
  overflow: hidden;
  border-radius: .6rem;
  background: #000;
  aspect-ratio: 16 / 9;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.portfolio-links {
  margin-top: 1.5rem;
  color: var(--muted);
}

.ai-form,
.search-form { margin-top: 1.25rem; }

.ai-form label,
.search-form label {
  display: block;
  margin-bottom: .45rem;
  font-weight: 750;
}

.ai-form-row {
  display: flex;
  gap: .65rem;
  align-items: stretch;
}

.ai-form input,
.search-form input {
  flex: 1;
  min-width: 0;
  padding: .75rem .85rem;
  border: 1px solid var(--border);
  border-radius: .55rem;
  background: var(--bg);
  color: var(--text);
}

.ai-form button {
  padding: .75rem 1rem;
  border: 2px solid var(--accent);
  border-radius: .55rem;
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 750;
  cursor: pointer;
}

.ai-form button:disabled,
.ai-form input:disabled {
  cursor: not-allowed;
  opacity: .65;
}

.ai-answer {
  min-height: 1.5rem;
  margin-top: 1rem;
  white-space: pre-wrap;
}

.ai-answer:not(:empty) {
  border-left: 4px solid var(--accent);
  padding-left: 1rem;
}

.ai-note {
  margin-bottom: 0;
  font-size: .95rem;
}

.search-results {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}
.search-result h2 { font-size: 1.25rem; }

.article-list-card { max-width: 780px; }
.article-page { padding-block: 3rem 5rem; }
.article-meta { margin-bottom: 2rem; }
.audio-box,
.note,
.references { margin-block: 2rem; }
.article-body { font-size: 1.12rem; }
.article-body p { margin-block: 1.25rem; }
.references ul { padding-left: 1.25rem; }

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
  color: var(--muted);
}

@media (max-width: 760px) {
  .portfolio-grid,
  .portal-grid,
  .home-feature { grid-template-columns: 1fr; }
  .featured-work { grid-column: auto; }
}

@media (max-width: 640px) {
  .header-inner,
  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  nav ul { flex-direction: column; gap: .45rem; }
  .hero { padding-top: 3rem; }
  .ai-form-row { flex-direction: column; }
}