:root {
  --ink: #2b2320;
  --muted: #6f625b;
  --paper: #faf6f0;
  --card: #ffffff;
  --accent: #9b3d2e;
  --accent-dark: #7e3125;
  --gold: #a87a2e;        /* borders and decoration */
  --gold-text: #85601f;   /* gold for small text: passes WCAG AA on paper and white */
  --line: #e6dccf;
  --slot: #efe7da;
  --highlight: #fff7e0;
  --sans: system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  overflow-wrap: break-word;
}

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--accent-dark); }

a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 1rem;
  font-family: var(--sans);
  z-index: 10;
}
.skip-link:focus { left: 1rem; top: 1rem; color: #fff; }

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 1.25rem 6vw;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 1.25rem;
  font-weight: bold;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--accent); }

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

nav a {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--sans);
  font-size: 0.95rem;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
nav a:hover { color: var(--accent); }

nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Main */
main {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 6vw 4rem;
}

h1 {
  font-size: 2.4rem;
  line-height: 1.2;
  margin: 0 0 1rem;
  text-wrap: balance;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.3;
  margin: 2.75rem 0 0.75rem;
}

p { text-wrap: pretty; }

.lede {
  font-size: 1.2rem;
  color: var(--muted);
}

.tag {
  font-family: var(--sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gold-text);
  margin: 0 0 0.5rem;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.5rem;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease;
}

.card:hover,
a.card:focus-visible { border-color: var(--accent); }

a.card:hover { color: inherit; }

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  line-height: 1.35;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.card p.tag { color: var(--gold-text); font-size: 0.75rem; margin-bottom: 0.5rem; }

/* Buttons */
.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1.2rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.95rem;
}
.btn:hover { background: var(--accent-dark); color: #fff; }

/* Owner-editable placeholders */
.placeholder {
  background: var(--highlight);
  border: 1px dashed var(--gold);
  padding: 0.05rem 0.4rem;
  border-radius: 3px;
  color: var(--ink);
}

/* Videos */
.video-slot {
  aspect-ratio: 16 / 9;
  background: var(--slot);
  border: 1px dashed var(--gold);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  text-align: center;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.9rem;
}

/* List entries (writing, earlier ventures) */
.entry {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0;
}

.entry h3 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
}

.entry .meta {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--gold-text);
  margin: 0 0 0.5rem;
}

/* Founders and section subheads */
main h3 {
  font-size: 1.15rem;
  line-height: 1.35;
  margin: 1.75rem 0 0.4rem;
}

.founder {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding-top: 2rem;
}
.founder h2 { margin-top: 0; }

/* Video embeds */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
  gap: 1.25rem;
  margin: 1.25rem 0 0;
}
.video { margin: 0; }
.video-frame {
  aspect-ratio: 16 / 9;
  background: var(--slot);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.video-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.video figcaption {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

/* Research page */
.byline {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--ink);
  border-left: 3px solid var(--gold);
  padding-left: 0.75rem;
  margin: 1.5rem 0 0.5rem;
}
.feature { margin-top: 1rem; }
.feature h3 { font-size: 1.4rem; }

.takeaways {
  list-style: none;
  counter-reset: t;
  padding: 0;
  margin: 1.25rem 0 0;
  display: grid;
  gap: 1rem;
}
.takeaways li {
  counter-increment: t;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  column-gap: 0.75rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem 1.25rem 1.25rem 1rem;
}
.takeaways li::before {
  content: counter(t, decimal-leading-zero);
  grid-row: span 2;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  padding-top: 0.2rem;
}
.takeaways h3 { margin: 0 0 0.25rem; }
.takeaways p { margin: 0; color: var(--muted); }

.note {
  margin-top: 2.5rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
}

/* Footer */
footer {
  border-top: 1px solid var(--line);
  padding: 2rem 6vw;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.9rem;
  text-align: center;
}
footer p { margin: 0.25rem 0; }

@media (max-width: 600px) {
  main { padding-top: 2rem; }
  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.3rem; }
  .lede { font-size: 1.1rem; }
}

@media (max-width: 400px) {
  h1 { font-size: 1.65rem; }
  nav { gap: 0.4rem 0.9rem; }
}