/* ============================================================
   About page — navy design system.
   Self-contained: imports the shared tokens and styles the
   about-page layout on top of them. All colour, type and
   spacing derive from tokens/*.css (single source of truth).
   ============================================================ */

@import "tokens/fonts.css";
@import "tokens/colors.css";
@import "tokens/typography.css";
@import "tokens/spacing.css";

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  font-family: var(--font-body);
  color: var(--text-body);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── NAV ─── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px var(--gutter);
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.nav-name {
  display: flex;
  align-items: center;
  line-height: 1;
}
.nav-logo-img {
  height: 26px;
  width: auto;
  display: block;
}
nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
}
nav ul a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: var(--tracking-nav);
  text-transform: uppercase;
  color: var(--soft);
  transition: color 0.15s;
}
nav ul a:hover { color: var(--ink); }
nav ul a.active { color: var(--accent); }

/* ─── SECTIONS ─── */
.section {
  padding: var(--section-pad) var(--gutter);
  border-top: 1px solid var(--line);
}
.section:first-of-type { border-top: none; }
.section-alt { background: var(--surface-card); }
.section-navy {
  background: var(--bg);
  padding: var(--section-pad) var(--gutter);
  border-top: 1px solid var(--line);
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  font-weight: 400;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.section h2,
.section-navy h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-h2);
  letter-spacing: var(--tracking-display);
  color: var(--ink);
  line-height: 1.05;
  margin-bottom: 2rem;
}

/* ─── ABOUT two-col ─── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.about-body p {
  font-size: var(--text-lede);
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 1rem;
}
.about-body p:last-child { margin-bottom: 0; }

/* ─── LEADERSHIP grid ─── */
.leadership-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-top: 3rem;
}
.leadership-card {
  padding: 2rem;
  background: var(--surface-card);
}
.leadership-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-label);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.leadership-card p {
  font-size: var(--text-body-sm);
  color: var(--soft);
  line-height: 1.7;
  margin: 0;
}
/* On the alt (card) surface, nested cards recede to page bg for contrast. */
.section-alt .leadership-card { background: var(--bg); }

/* ─── EXPERIENCE TIMELINE ─── */
.timeline {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
}
.timeline-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--line);
}
.timeline-meta .date {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--soft);
  display: block;
  margin-bottom: 0.6rem;
}
.timeline-meta h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-card-title);
  color: var(--ink);
  line-height: 1.25;
}
.exchange {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  margin-left: 0.35rem;
  vertical-align: middle;
  letter-spacing: 0.06em;
}
.timeline-body .role {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}
.timeline-body ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.timeline-body li {
  font-size: var(--text-body-sm);
  color: var(--text-body);
  line-height: 1.7;
  padding-left: 1.2rem;
  position: relative;
}
.timeline-body li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ─── SKILLS ─── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-top: 3rem;
}
.skill-group {
  padding: 2rem;
  background: var(--surface-card);
}
.section-alt .skill-group { background: var(--bg); }
.skill-group h4 {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.85rem;
}
.skill-group p {
  font-size: var(--text-body-sm);
  color: var(--soft);
  line-height: 1.7;
}

.edu-list {
  list-style: none;
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.edu-list li {
  font-size: var(--text-body-sm);
  color: var(--text-body);
  padding-left: 1.2rem;
  position: relative;
}
.edu-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  top: 0.1rem;
}
.edu-list strong { color: var(--ink); font-weight: 600; }

/* ─── SPEAKING ─── */
.speaking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
}
.speaking-col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}
.speaking-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.speaking-list li {
  font-size: var(--text-body-sm);
  color: var(--soft);
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.55;
}
.speaking-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.copyright {
  font-family: var(--font-mono);
  text-align: center;
  font-size: var(--text-label);
  letter-spacing: 0.06em;
  color: var(--soft);
  margin-top: 3rem;
}

/* ─── RESPONSIVE — tablet ─── */
@media (max-width: 900px) {
  nav ul { gap: 1rem; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.75rem; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .leadership-grid { grid-template-columns: 1fr 1fr; }
  .speaking-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ─── RESPONSIVE — mobile ─── */
@media (max-width: 480px) {
  nav { padding: 14px 1rem; }
  .skills-grid { grid-template-columns: 1fr; }
  .leadership-grid { grid-template-columns: 1fr; }
}