/* ============================================================
   ABOUT.CSS — About page styles
   ============================================================ */

/* ── About Hero ──────────────────────────────────────────────── */
.about-hero {
  position: relative;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32)) clamp(var(--space-12), 6vw, var(--space-20));
  overflow: hidden;
  border-bottom: 1px solid var(--color-divider);
}

.about-hero__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(var(--space-12), 6vw, var(--space-20));
  align-items: center;
  position: relative;
  z-index: 1;
}

@media (max-width: 800px) {
  .about-hero__inner {
    grid-template-columns: 1fr;
  }
}

.about-hero__heading {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-block: var(--space-5) var(--space-7);
}

.about-hero__lead {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  line-height: 1.8;
}

.about-portrait-frame {
  position: relative;
}

.about-portrait-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  display: block;
  border: 1px solid var(--color-border);
}

.about-portrait-caption {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
}

/* ── Bio sections ────────────────────────────────────────────── */
.bio-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 700px) {
  .bio-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .bio-sidebar {
    position: static;
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
  }
  .bio-sidebar__chapter {
    margin-bottom: var(--space-1);
  }
  .bio-content {
    padding-top: 0;
  }
}

.bio-sidebar {
  padding-top: var(--space-1);
}

@media (min-width: 701px) {
  .bio-sidebar {
    position: sticky;
    top: calc(60px + var(--space-8));
  }
}

.bio-sidebar__chapter {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.bio-sidebar__place {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.bio-sidebar__years {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
}

.bio-heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: var(--space-8);
  max-width: 26ch;
}

.bio-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.bio-text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.82;
  max-width: 62ch;
}

/* ── Skills grid ─────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

@media (max-width: 600px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

.skill-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: box-shadow var(--transition-base);
}

.skill-block:hover {
  box-shadow: var(--shadow-sm);
}

.skill-block__heading {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: 0.01em;
}

.skill-block__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 100%;
}

/* ── Timeline ────────────────────────────────────────────────── */
.timeline-section {
  background: var(--color-surface);
  border-block: 1px solid var(--color-divider);
}

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: var(--space-8);
  border-left: 1.5px solid var(--color-border);
  margin-left: var(--space-4);
}

.timeline-item {
  position: relative;
  padding: var(--space-5) 0 var(--space-8) var(--space-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item__marker {
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: var(--space-6);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  border: 2px solid var(--color-bg);
  transition: background var(--transition-base);
}

.timeline-item:last-child .timeline-item__marker {
  background: var(--color-primary);
  width: 12px;
  height: 12px;
  left: calc(-1 * var(--space-8) - 6px);
}

.timeline-item__date {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: var(--space-2);
}

.timeline-item__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.timeline-item__org {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.timeline-item__note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 56ch;
}

.timeline-item__current {
  display: inline-flex;
  align-items: center;
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-subtle);
  padding: 0.2em 0.7em;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary-highlight);
}

/* ── Contact nudge ───────────────────────────────────────────── */
.contact-nudge__inner {
  max-width: 48ch;
}

.contact-nudge__heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.contact-nudge__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Older bio sections — progressive de-emphasis ─────── */
.bio-section--muted {
  opacity: 0.7;
}

.bio-section--muted .bio-heading {
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
}

.bio-section--muted .bio-sidebar__place,
.bio-section--muted .bio-sidebar__years {
  opacity: 0.7;
}

.bio-section--muted-more {
  opacity: 0.5;
}

.bio-section--muted-more .bio-heading {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
}

.bio-section--muted-more .bio-sidebar__place,
.bio-section--muted-more .bio-sidebar__years {
  opacity: 0.6;
}

/* ── Timeline — "current" item prominent ─────────────── */
.timeline-item:first-child .timeline-item__marker {
  background: var(--color-green);
  opacity: 1;
}

.timeline-item:first-child .timeline-item__title {
  color: var(--color-green);
}

.timeline-item:nth-child(n+4) {
  opacity: 0.55;
}

.timeline-item:nth-child(n+4) .timeline-item__note {
  font-size: var(--text-sm);
}