/* Governed Intelligence — Personal Authority Site
   Design: Minimal editorial. Authority through restraint.
   Palette: near-white bg, dark text, deep blue accent, warm gray secondary */

/* ── Reset & Base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --color-bg: #FAFAF8;
  --color-bg-alt: #F2F1EE;
  --color-bg-white: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-secondary: #5C5C5C;
  --color-text-tertiary: #8C8C8C;
  --color-accent: #1B3A5C;
  --color-accent-light: #2D5F8A;
  --color-accent-bg: #EDF2F7;
  --color-border: #E0DED8;
  --color-border-light: #ECEAE4;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
  --max-width: 720px;
  --max-width-wide: 960px;
}

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

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

img { max-width: 100%; display: block; }

/* ── Typography ── */
h1 { font-size: 2rem; font-weight: 500; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
h2 { font-size: 1.35rem; font-weight: 500; line-height: 1.3; letter-spacing: -0.01em; margin-bottom: 0.75rem; }
h3 { font-size: 1.1rem; font-weight: 500; line-height: 1.4; margin-bottom: 0.5rem; }

.subtitle {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 540px;
}

.label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

/* ── Layout ── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.container-wide { max-width: var(--max-width-wide); margin: 0 auto; padding: 0 1.5rem; }

.section { padding: 4rem 0; }
.section + .section { border-top: 1px solid var(--color-border-light); }

/* ── Navigation ── */
nav {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .container-wide {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav-logo span { color: var(--color-text-tertiary); font-weight: 400; }

.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 400;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--color-text); }
.nav-links a.active { color: var(--color-text); font-weight: 500; }

/* ── Hero ── */
.hero {
  padding: 5rem 0 4rem;
}

.hero h1 {
  font-size: 2.5rem;
  max-width: 600px;
  margin-bottom: 1.25rem;
}

.hero .subtitle {
  margin-bottom: 2rem;
}

/* ── Paper / Publication cards ── */
.pub-list { display: flex; flex-direction: column; gap: 1.5rem; }

.pub-card {
  padding: 1.5rem;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: 6px;
  transition: border-color 0.15s;
}
.pub-card:hover { border-color: var(--color-border); }

.pub-card .label { margin-bottom: 0.5rem; }

.pub-card h3 { margin-bottom: 0.5rem; }
.pub-card h3 a { color: var(--color-text); }
.pub-card h3 a:hover { color: var(--color-accent); }

.pub-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.pub-card .authors {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  margin-top: 0.75rem;
}

/* ── Manifesto cards ── */
.manifesto-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.manifesto-card {
  padding: 1.25rem;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: 6px;
}

.manifesto-card .layer-tag {
  display: inline-block;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: var(--color-accent-bg);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

/* ── Team / About ── */
.team-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.team-member {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.team-photo {
  width: 100%;
  aspect-ratio: 1;
  max-width: 200px;
  background: var(--color-bg-alt);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  font-size: 0.8125rem;
}

.team-member h3 { margin-bottom: 0.25rem; }
.team-member .role {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

/* ── Speaking ── */
.speaking-list { display: flex; flex-direction: column; gap: 1rem; }

.speaking-item {
  display: flex;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.speaking-date {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  min-width: 100px;
  font-variant-numeric: tabular-nums;
}

.speaking-item h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.speaking-venue { font-size: 0.875rem; color: var(--color-text-secondary); }

/* ── Contact ── */
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 1rem;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* ── Footer ── */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border-light);
  margin-top: 2rem;
}

footer p {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero h1 { font-size: 1.75rem; }
  .team-grid { grid-template-columns: 1fr; }
  .nav-links { gap: 1.25rem; }
  .speaking-item { flex-direction: column; gap: 0.25rem; }
  .speaking-date { min-width: auto; }
}