:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #4338ca;
  --accent-dark: #3730a3;
  --accent-soft: #eef2ff;
  --accent-2: #c2410c;
  --accent-2-dark: #9a3412;
  --accent-2-soft: #fff1e9;
  --type-label: #0d9488;
  --type-tag: #7c3aed;
  --type-tag-dark: #6d28d9;
  --type-tag-soft: #f5f3ff;
  --type-meta: #b45309;
  --font-display: "Sora", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 999px;
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -16px rgba(15, 23, 42, 0.16);
  --shadow-card-hover: 0 6px 16px -4px rgba(67, 56, 202, 0.14), 0 20px 40px -20px rgba(15, 23, 42, 0.25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--bg);
  background-image: radial-gradient(rgba(15, 23, 42, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 1.5rem; }
img { max-width: 100%; display: block; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.05rem 1.5rem;
}
.nav { display: flex; align-items: center; gap: 1.9rem; }
.nav a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding-bottom: 0.4rem;
  transition: color 0.15s ease;
}
.nav a:hover { color: var(--text-primary); }
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}
.nav a.is-active { color: var(--accent); }
.nav a.is-active::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; }

/* Hero */
.hero {
  padding: 4.5rem 0;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 12% 0%, rgba(67, 56, 202, 0.13), transparent 60%),
    radial-gradient(ellipse 55% 45% at 92% 15%, rgba(124, 58, 237, 0.11), transparent 60%),
    radial-gradient(ellipse 45% 40% at 50% 100%, rgba(180, 83, 9, 0.06), transparent 65%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, var(--bg) 100%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-inner { width: 100%; }
.hero-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
  margin-bottom: 2.8rem;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--type-label);
  margin: 0 0 1rem;
}
.hero-text h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.9rem;
  color: var(--text-primary);
}
.hero-role {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.02rem;
  color: var(--text-secondary);
  margin: 0 0 1.4rem;
}
.hero-lede {
  color: var(--text-secondary);
  font-size: 1.02rem;
  max-width: 56ch;
  margin: 0 0 1.7rem;
}
.hero-lede strong { color: var(--text-primary); font-weight: 600; }
.hero-facts { list-style: none; margin: 0; padding: 0; }
.hero-facts li {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.4rem 0;
  border-top: 1px solid var(--border);
}
.hero-facts li:before { content: "— "; color: var(--text-muted); }

/* Hero info block — horizontal icon card row */
.hero-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.2rem;
  border-top: 1px solid var(--border);
  padding-top: 1.8rem;
}
.hero-info-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  text-decoration: none;
  cursor: pointer;
}
.hero-info-card-static { cursor: default; }
.hero-info-media {
  display: flex;
  align-items: center;
  height: 46px;
  margin-bottom: 0.2rem;
}
.hero-info-card .icon-badge { margin-bottom: 0; transition: background 0.15s ease, color 0.15s ease; }
a.hero-info-card:hover .icon-badge { background: var(--accent); color: #fff; }
.hero-info-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--type-label);
}
.hero-info-value {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.88rem;
  line-height: 1.3;
  word-break: break-word;
  transition: color 0.15s ease;
}
a.hero-info-card:hover .hero-info-value { color: var(--accent); }

.hero-info-card-logo .grail-logo {
  height: 46px;
  width: auto;
  margin-bottom: 0;
  transition: opacity 0.15s ease;
}
.hero-info-card-logo:hover .grail-logo { opacity: 0.6; }

.hero-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.btn {
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: linear-gradient(120deg, var(--accent), var(--type-tag)); color: #fff; box-shadow: 0 8px 20px -8px rgba(67, 56, 202, 0.45); }
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn-ghost { color: var(--text-primary); border: 1px solid var(--border-strong); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

.hero-photo { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.photo-frame {
  width: 100%;
  max-width: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 20px 45px -18px rgba(67, 56, 202, 0.35), 0 8px 20px -12px rgba(124, 58, 237, 0.25);
}
.photo-frame img { width: 100%; height: auto; }
.photo-caption {
  display: flex;
  gap: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Sections */
.section { padding: 5.5rem 0; }
.section-compact { padding: 2.6rem 0; }
.section-alt {
  background:
    radial-gradient(ellipse 70% 100% at 0% 0%, rgba(13, 148, 136, 0.05), transparent 60%),
    radial-gradient(ellipse 60% 90% at 100% 100%, rgba(124, 58, 237, 0.05), transparent 60%),
    var(--bg-alt);
}
.section-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--type-label);
  margin: 0 0 0.5rem;
}
.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--type-label);
  margin: 0 0 0.6rem;
}

.section-title {
  position: relative;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  letter-spacing: -0.015em;
  margin: 0 0 1.9rem;
  padding-bottom: 1rem;
  color: var(--text-primary);
}
.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 46px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--type-tag));
}
.section-intro { color: var(--text-secondary); max-width: 68ch; margin: 0 0 1.1rem; font-size: 1rem; }

/* Pillars (About) */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.2rem;
  margin-top: 2.2rem;
}
.pillar-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.pillar-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.pillar-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.pillar-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0.5rem 0 0.5rem;
}
.pillar-card p { color: var(--text-secondary); font-size: 0.92rem; margin: 0; }

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}
.timeline-marker {
  position: absolute;
  left: -2.4rem;
  top: 0.4rem;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.timeline-current .timeline-marker { background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.timeline-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.6rem;
  box-shadow: var(--shadow-card);
}
.timeline-range {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--type-meta);
  margin-bottom: 0.4rem;
}
.timeline-card h3 { font-family: var(--font-display); font-size: 1.15rem; margin: 0 0 0.5rem; }
.timeline-card p { color: var(--text-secondary); font-size: 0.93rem; margin: 0 0 1rem; }

/* Tags — one violet style for all categorization chips, sitewide */
.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  background: var(--type-tag-soft);
  color: var(--type-tag-dark);
  font-size: 0.78rem;
  font-weight: 600;
}
.tag-mono {
  font-family: var(--font-mono);
  background: var(--type-tag-soft);
  border: 1px solid transparent;
  color: var(--type-tag-dark);
  font-weight: 500;
}

/* Focus grid */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.1rem;
  margin-bottom: 2.5rem;
}
.focus-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.focus-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.focus-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin: 0 0 0.5rem; }
.focus-card p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }

/* Process */
.process {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}
.process-title { font-family: var(--font-display); font-size: 1.1rem; margin: 0 0 1.1rem; }
.pipeline { display: flex; flex-wrap: wrap; align-items: center; gap: 0.45rem; margin-bottom: 1.2rem; }
.pipe-step {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--accent-soft);
  color: var(--accent-dark);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.95rem;
}
.pipe-step:not(:last-child)::after { content: "→"; margin-left: 0.5rem; color: var(--text-muted); }
.pipe-step-final { background: var(--text-primary); color: #fff; }
.process-copy { color: var(--text-secondary); font-size: 0.95rem; margin: 0; max-width: 68ch; }

/* Work grid */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.1rem;
}
.work-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.work-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.work-card h3 { font-family: var(--font-display); font-size: 1.02rem; margin: 0 0 0.5rem; }
.work-card p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }

/* Skills */
.skill-rows { display: flex; flex-direction: column; gap: 1rem; }
.skill-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 1rem;
  align-items: center;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
}
.skill-cat {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Mentoring */
.mentoring-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: start;
}
.flow-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.2rem; }
.flow-step {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--card-bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.9rem;
}
.flow-step:not(:last-child)::after { content: "→"; margin-left: 0.5rem; color: var(--accent); }
.mentor-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
}
.mentor-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin: 0 0 1rem; }
.mentor-card ul { margin: 0; padding-left: 1.1rem; color: var(--text-secondary); font-size: 0.9rem; }
.mentor-card li { margin-bottom: 0.6rem; }

/* Recognition — condensed badge list */
.badge-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 1.8rem;
  border-top: 1px solid var(--border);
}
.badge-row {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.badge-rank {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-2-dark);
  background: var(--accent-2-soft);
  border-radius: var(--radius-sm);
  padding: 0.28rem 0.7rem;
  width: fit-content;
}
.badge-body strong { display: block; font-size: 0.95rem; color: var(--text-primary); }
.badge-body span { font-size: 0.86rem; color: var(--text-secondary); }
.badge-year { font-family: var(--font-mono); font-size: 0.78rem; color: var(--type-meta); }

/* Page hero (subpages) */
.page-hero { padding: 3.5rem 0 1rem; }
.page-hero .section-title { margin-bottom: 1rem; }
.page-hero .section-intro { font-size: 1.05rem; }

/* Criteria grid (Research -> Product) */
.criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
  margin-top: 2rem;
}
.criteria-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}
.criteria-card h3 { font-family: var(--font-display); font-size: 1rem; margin: 0 0 0.9rem; }
.criteria-card ul { margin: 0; padding-left: 1.1rem; color: var(--text-secondary); font-size: 0.9rem; }
.criteria-card li { margin-bottom: 0.5rem; }

/* Case studies */
.tier-block { margin-bottom: 3rem; }
.tier-block:last-child { margin-bottom: 0; }
.tier-title { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; margin: 0 0 0.4rem; }
.tier-intro { color: var(--text-secondary); font-size: 0.92rem; margin: 0 0 1.4rem; max-width: 68ch; }

.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.3rem;
}
.cs-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.7rem 1.8rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.cs-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.cs-card h3 { font-family: var(--font-display); font-size: 1.12rem; margin: 0 0 1rem; }
.cs-block { margin-bottom: 0.9rem; }
.cs-block:last-of-type { margin-bottom: 1.1rem; }
.cs-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.cs-block p { margin: 0; color: var(--text-secondary); font-size: 0.9rem; }

/* Current role strip */
.current-role {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.9rem;
  box-shadow: var(--shadow-card);
}
.current-role-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 0.4rem;
}
.current-role-title { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; margin: 0 0 0.2rem; }
.current-role-org { color: var(--text-secondary); font-size: 0.92rem; margin: 0 0 0.5rem; }
.current-role-tags { color: var(--text-muted); font-size: 0.82rem; font-family: var(--font-mono); }
.current-role .btn { flex-shrink: 0; }

/* What I Work On */
.work-on-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}
.work-on-card {
  border-top: 2px solid var(--text-primary);
  padding-top: 1rem;
}
.work-on-num { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); }
.work-on-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.02em;
  margin: 0.4rem 0 0.5rem;
  text-transform: uppercase;
}
.work-on-card p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }

/* Timeline stage label */
.timeline-stage {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-left: 0.6rem;
}

/* Methodology groups */
.method-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.6rem;
}
.method-group-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.7rem;
}
.method-group .pipeline { margin-bottom: 0; }

/* Publications list */
.pub-list { border-top: 1px solid var(--border); }
.pub-entry {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 1.2rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--border);
}
.pub-num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  padding-top: 0.15rem;
}
.pub-entry-body h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.45;
  margin: 0 0 0.55rem;
  color: var(--text-primary);
}
.pub-cite { font-size: 0.88rem; color: var(--text-secondary); margin: 0 0 0.5rem; }
.pub-cite em { font-style: italic; color: var(--text-muted); }
.pub-tags { font-family: var(--font-mono); font-size: 0.78rem; color: var(--type-tag); margin: 0; }
.pub-doi { font-family: var(--font-mono); font-size: 0.78rem; margin-top: 0.6rem; display: inline-block; color: var(--accent-dark); }
.pub-stats {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0.8rem 0 0;
}
.pub-closing {
  margin: 3rem 0 0;
  padding: 1.8rem 2.2rem;
  border-left: 3px solid var(--accent-2);
  background: var(--card-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.pub-closing-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.01em;
}
.pub-empty {
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  text-align: center;
  color: var(--text-secondary);
}

/* Blog cards */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}
.blog-card {
  display: block;
  width: 100%;
  max-width: 380px;
  position: relative;
  text-decoration: none;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.blog-card::before, .product-card::before, .dataset-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: linear-gradient(90deg, var(--accent), var(--type-tag), var(--type-meta));
  z-index: 2;
}
.blog-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.blog-card-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background: var(--bg-alt);
}
.blog-card-body { padding: 1.4rem 1.5rem; }
.blog-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}
.blog-card-domain {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--type-tag);
}
.blog-card-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--type-meta);
}
.blog-card .icon-badge { margin-bottom: 1rem; }
.blog-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text-primary);
  margin: 0 0 0.7rem;
  line-height: 1.35;
}
.blog-card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0 0 1.1rem;
}
.blog-card .tag-row { margin-bottom: 1.1rem; }
.blog-link-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.blog-card:hover .blog-link-label { color: var(--accent); }

/* Product cards */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.3rem;
  margin-top: 2rem;
}
.product-card {
  display: block;
  position: relative;
  text-decoration: none;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.9rem 1.8rem 1.7rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.product-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.product-category {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--type-tag);
  margin-bottom: 0.7rem;
}
.product-card h3 { font-family: var(--font-display); font-size: 1.15rem; margin: 0 0 0.4rem; color: var(--text-primary); }
.product-tagline { font-size: 0.88rem; font-weight: 600; color: var(--text-secondary); margin: 0 0 0.8rem; }
.product-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.55; margin: 0 0 1.1rem; }
.product-card .tag-row { margin-bottom: 1.1rem; }
.product-card:hover .blog-link-label { color: var(--accent); }

/* Dataset cards */
.dataset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}
.dataset-card {
  display: block;
  position: relative;
  text-decoration: none;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.dataset-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.dataset-cover-wrap { position: relative; }
.dataset-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background: var(--bg-alt);
}
.dataset-badge {
  position: absolute;
  top: 0.9rem;
  left: 0.9rem;
  background: rgba(15, 23, 42, 0.72);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}
.dataset-card-body { padding: 1.5rem 1.6rem; }
.dataset-card h3 { font-family: var(--font-display); font-size: 1.1rem; margin: 0 0 0.6rem; color: var(--text-primary); }
.dataset-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.55; margin: 0 0 1rem; }
.dataset-stats { display: flex; flex-wrap: wrap; gap: 1.2rem; margin-bottom: 1.1rem; }
.dataset-stat {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--type-meta);
}
.dataset-stat svg { width: 15px; height: 15px; flex-shrink: 0; }
.dataset-card .tag-row { gap: 0.4rem; }

/* Icons */
.icon-badge {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-soft), var(--type-tag-soft));
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.7rem;
}
.icon-badge svg { width: 22px; height: 22px; }
.icon-badge-text {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.footer-links a.icon-link { display: inline-flex; align-items: center; gap: 0.45rem; }
.footer-links a.icon-link svg { width: 16px; height: 16px; }
.footer-links a.icon-link .icon-badge-text { width: 16px; height: 16px; border-radius: 3px; font-size: 0.55rem; }
.contact-card .icon-badge { margin-bottom: 0.5rem; }
.contact-card > .icon-badge-text {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

/* Contact categories */
.contact-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.3rem;
  margin: 2rem 0;
}
.contact-category h3 { font-family: var(--font-display); font-size: 0.98rem; margin: 0 0 0.4rem; }
.contact-category p { color: var(--text-secondary); font-size: 0.88rem; margin: 0; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 2rem 0 2.8rem;
}
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.3rem 1.2rem;
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.contact-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); border-color: var(--accent); }
.contact-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.contact-value { color: var(--text-primary); font-weight: 600; font-size: 0.95rem; word-break: break-word; }

.philosophy {
  margin: 0 auto;
  max-width: 620px;
  padding: 1.9rem 2.1rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  text-align: center;
}
.philosophy p {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  margin: 0 0 0.7rem;
  color: var(--text-primary);
}
.philosophy-note { font-family: var(--font-body); font-weight: 400; font-size: 0.95rem; color: var(--text-secondary); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 2.4rem 0; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-brand { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; color: var(--text-primary); }
.footer-tagline { color: var(--text-muted); font-size: 0.85rem; margin: 0.3rem 0 0; }
.footer-links { display: flex; gap: 1.2rem; align-items: center; }
.footer-links a { color: var(--text-secondary); font-size: 0.85rem; text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.footer-meta {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.back-to-top {
  background: none;
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
.back-to-top:hover { border-color: var(--accent); color: var(--accent); }

/* Career progression (horizontal timeline) */
.career-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.6rem 1.4rem;
}
.career-card { border-top: 2px solid var(--text-primary); padding-top: 1rem; }
.career-year { font-family: var(--font-mono); font-size: 0.78rem; color: var(--type-meta); }
.career-card h3 { font-family: var(--font-display); font-size: 1rem; margin: 0.4rem 0 0.15rem; }
.career-stage {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--type-label);
  display: block;
  margin-bottom: 0.7rem;
}
.career-card ul { margin: 0; padding-left: 1.05rem; color: var(--text-secondary); font-size: 0.86rem; }
.career-card li { margin-bottom: 0.3rem; }
.career-card p { margin: 0; color: var(--text-secondary); font-size: 0.86rem; line-height: 1.55; }

.journey-closing {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}
.journey-arc {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
}
.journey-closing .flow-row { justify-content: center; }

/* Technical leadership */
.leadership-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.2rem;
}
.leadership-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}
.leadership-card h3 { font-family: var(--font-display); font-size: 1rem; margin: 0 0 0.6rem; }
.leadership-card p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }
.leadership-card .tag-row { margin-top: 0.8rem; }

/* Education */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.4rem;
}
.edu-item { border-top: 2px solid var(--border-strong); padding-top: 0.9rem; }
.edu-degree { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; margin: 0 0 0.3rem; }
.edu-school { color: var(--text-secondary); font-size: 0.9rem; margin: 0 0 0.2rem; }
.edu-years { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); }

/* Institution logo wall */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
}
.logo-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 90px;
}
.logo-item img {
  max-width: 100%;
  max-height: 56px;
  width: auto;
  filter: grayscale(1);
  opacity: 0.65;
  transition: filter 0.2s ease, opacity 0.2s ease;
}
.logo-item:hover img { filter: grayscale(0); opacity: 1; }

/* Compact contact */
.contact-links { display: flex; flex-wrap: wrap; gap: 1.4rem; margin: 1.6rem 0 1.2rem; }
.icon-link-lg svg, .icon-link-lg .icon-badge-text { width: 20px; height: 20px; }
.icon-link-lg { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--text-primary); text-decoration: none; font-weight: 600; font-size: 0.92rem; }
.icon-link-lg:hover { color: var(--section-accent, var(--accent)); }
.contact-meta { color: var(--text-muted); font-size: 0.88rem; }

/* Contact section — split layout */
.contact-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: end;
}
.contact-cta-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1.35;
  color: var(--text-primary);
  margin: 2rem 0 1.4rem;
  letter-spacing: -0.01em;
}
.contact-list { display: flex; flex-direction: column; }
.contact-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: padding-left 0.2s ease;
}
.contact-list .contact-row:first-child { border-top: 1px solid var(--border); }
.contact-row:hover { padding-left: 0.4rem; }
.icon-badge-sm {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  flex-shrink: 0;
  margin-bottom: 0;
}
.icon-badge-sm svg { width: 16px; height: 16px; }
.contact-row:hover .icon-badge { background: var(--accent); color: #fff; }
.contact-row-text { display: flex; flex-direction: column; gap: 0.15rem; }
.contact-row:hover .contact-row-text .hero-info-value { color: var(--accent); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 860px) {
  .hero-top { grid-template-columns: 1fr; }
  .hero-photo { order: -1; max-width: 240px; margin: 0 auto; }
  .hero-info-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-split { grid-template-columns: 1fr; gap: 2.2rem; }
  .pillar-grid { grid-template-columns: 1fr; }
  .mentoring-grid { grid-template-columns: 1fr; }
  .skill-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .badge-row { grid-template-columns: 1fr; gap: 0.3rem; }
  .current-role { flex-direction: column; align-items: flex-start; }
  .footer-inner { flex-direction: column; }
  .footer-meta { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
  .career-grid { grid-template-columns: 1fr; }
  .logo-grid { grid-template-columns: repeat(2, 1fr); }
  .nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem 1.5rem;
    gap: 1rem;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav-toggle { display: flex; }
}