/* ===== TOKENS ===== */
:root {
  --bg:          #080c15;
  --bg-alt:      #0c1020;
  --surface:     #0f1520;
  --surface-2:   #141c2e;
  --border:      #1e2a40;
  --border-2:    #253347;
  --blue:        #3b82f6;
  --blue-dim:    #1d4ed8;
  --blue-glow:   rgba(59, 130, 246, 0.12);
  --blue-glow-2: rgba(59, 130, 246, 0.06);
  --text:        #eef2ff;
  --text-2:      #94a3b8;
  --text-3:      #4b5e7a;
  --mono-font:   'JetBrains Mono', 'Fira Code', monospace;
  --sans-font:   'Inter', system-ui, sans-serif;
  --radius:      12px;
  --radius-sm:   8px;
  --nav-h:       64px;
  --transition:  0.22s ease;
}

[data-theme="light"] {
  --bg:          #f8fafc;
  --bg-alt:      #f1f5f9;
  --surface:     #ffffff;
  --surface-2:   #f8fafc;
  --border:      #e2e8f0;
  --border-2:    #cbd5e1;
  --blue:        #2563eb;
  --blue-dim:    #1d4ed8;
  --blue-glow:   rgba(37, 99, 235, 0.08);
  --blue-glow-2: rgba(37, 99, 235, 0.04);
  --text:        #0f172a;
  --text-2:      #475569;
  --text-3:      #94a3b8;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ===== UTILITY ===== */
.mono { font-family: var(--mono-font); }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 100px 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
  margin-bottom: 56px;
}
.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-top: 8px;
}
.section-desc {
  color: var(--text-2);
  max-width: 600px;
  margin-top: 12px;
  font-size: 1rem;
}

.section-tag {
  font-size: 0.7rem;
  color: var(--blue);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: rgba(8, 12, 21, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
[data-theme="light"] .nav {
  background: rgba(248, 250, 252, 0.9);
}
.nav.scrolled {
  border-bottom-color: var(--border);
}

.nav-logo {
  font-family: var(--mono-font);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--blue);
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--text-2);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }

.nav-cta {
  background: var(--blue);
  color: #fff !important;
  padding: 7px 16px;
  border-radius: 6px;
  font-size: 0.85rem !important;
  font-weight: 500;
  transition: opacity var(--transition) !important;
}
.nav-cta:hover { opacity: 0.85; }

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-2);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition);
}
.theme-toggle:hover { border-color: var(--blue); color: var(--blue); }

.nav-mobile-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  background: var(--bg);
  z-index: 99;
  flex-direction: column;
  padding: 32px 24px;
  gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-link {
  font-size: 1.25rem;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
}
.mobile-link:hover { color: var(--text); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 40%, transparent 100%);
}
[data-theme="light"] .hero-bg-grid { opacity: 0.2; }

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-tag {
  font-size: 0.72rem;
  color: var(--blue);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-tag::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--blue);
}

.hero-name {
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 20px;
}

.hero-role {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-2);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  height: 2em;
}
.role-prefix { color: var(--blue); }

.typewriter { color: var(--text); font-weight: 500; }

.cursor {
  color: var(--blue);
  font-weight: 300;
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero-bio {
  max-width: 540px;
  color: var(--text-2);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--blue-dim); transform: translateY(-1px); }
.btn-ghost {
  border: 1px solid var(--border-2);
  color: var(--text-2);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--blue), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== PILLARS ===== */
.pillars { padding: 64px 0; border-bottom: 1px solid var(--border); }
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.pillar {
  padding: 40px 36px;
  border-right: 1px solid var(--border);
  transition: background var(--transition);
}
.pillar:last-child { border-right: none; }
.pillar:hover { background: var(--blue-glow-2); }

.pillar-icon {
  font-size: 1.5rem;
  color: var(--blue);
  margin-bottom: 16px;
  line-height: 1;
}
.pillar h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.pillar p { font-size: 0.9rem; color: var(--text-2); line-height: 1.65; }

/* ===== COMPANY BLOCKS ===== */
.company-block {
  margin-bottom: 72px;
}
.company-block:last-child { margin-bottom: 0; }

.company-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.company-meta { display: flex; align-items: center; gap: 16px; }

.company-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 4px;
}
.company-dot.blue { background: var(--blue); box-shadow: 0 0 8px var(--blue); }
.company-dot.green { background: #22c55e; box-shadow: 0 0 8px #22c55e; }

.company-name {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.company-role {
  font-size: 0.75rem;
  color: var(--text-2);
  display: block;
  margin-top: 4px;
}
.company-dates {
  font-size: 0.72rem;
  color: var(--text-3);
  white-space: nowrap;
  letter-spacing: 0.05em;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.work-grid.three-col { grid-template-columns: repeat(3, 1fr); }

.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}
.work-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-2), transparent);
  transition: background var(--transition);
}
.work-card:hover {
  border-color: var(--border-2);
  background: var(--surface-2);
}
.work-card:hover::before {
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
}
.work-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.work-tag {
  font-size: 0.65rem;
  color: var(--blue);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.work-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.work-card p {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 16px;
}

.work-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.metric {
  font-family: var(--mono-font);
  font-size: 0.65rem;
  background: var(--blue-glow);
  color: var(--blue);
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.04em;
  border: 1px solid rgba(59, 130, 246, 0.15);
}
[data-theme="light"] .metric { background: rgba(37,99,235,0.07); }

/* ===== THOUGHT LEADERSHIP ===== */
.thinking-featured {
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}

.thinking-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color var(--transition), transform var(--transition);
}
.thinking-card:hover {
  border-color: var(--border-2);
  transform: translateY(-2px);
}
.thinking-card.featured {
  border-color: rgba(59, 130, 246, 0.3);
  background: linear-gradient(135deg, var(--surface), rgba(59, 130, 246, 0.04));
}

.thinking-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.thinking-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.thinking-tag {
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.thinking-status {
  font-size: 0.62rem;
  color: var(--blue);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--blue-glow);
  padding: 3px 8px;
  border-radius: 4px;
}

.thinking-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.thinking-card.featured h3 { font-size: 1.6rem; }

.thinking-subtitle {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-2);
  margin-bottom: 16px;
}

.thinking-card p {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.65;
  margin-bottom: 16px;
}

.thinking-pull {
  font-size: 1rem !important;
  color: var(--text) !important;
  font-style: italic;
  padding-left: 16px;
  border-left: 2px solid var(--blue);
  margin: 20px 0 !important;
}

.thinking-themes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}
.theme-tag {
  font-family: var(--mono-font);
  font-size: 0.62rem;
  color: var(--text-3);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.06em;
}

.thinking-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--blue);
  transition: gap var(--transition);
}
.thinking-link:hover { text-decoration: underline; }

.thinking-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.thinking-link-row .thinking-link { margin-top: 0; }

.thinking-card-image {
  display: block;
  max-width: none;
  width: calc(100% + 64px);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin: -32px -32px 20px;
  border-radius: var(--radius) var(--radius) 0 0;
}

.thinking-video {
  display: block;
  width: 100%;
  max-height: 320px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: #000;
  margin: 20px 0;
  border: 1px solid var(--border);
}

/* ===== AWARDS ===== */
.awards-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.award-row {
  display: grid;
  grid-template-columns: 80px 1fr 140px;
  gap: 32px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.award-row:last-child { border-bottom: none; }
.award-row:hover { background: var(--blue-glow-2); }

.award-year {
  font-size: 0.72rem;
  color: var(--blue);
  letter-spacing: 0.1em;
  padding-top: 2px;
}
.award-body h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.award-body p {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.55;
}
.award-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-top: 10px;
}
.award-org {
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-align: right;
  padding-top: 2px;
}

/* ===== ACADEMIC ===== */
.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.filter-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.82rem;
  cursor: pointer;
  font-family: var(--sans-font);
  transition: all var(--transition);
}
.filter-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
}
.filter-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.academic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.acad-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.acad-card:hover {
  border-color: var(--border-2);
  background: var(--surface-2);
  transform: translateY(-2px);
}
.acad-card.hidden { display: none; }

.acad-tag {
  font-size: 0.6rem;
  color: var(--blue);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.acad-card h4 {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.acad-card p {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.55;
  flex: 1;
}
.acad-link {
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
  margin-top: auto;
}
.acad-link-active {
  font-size: 0.75rem;
  color: var(--blue);
  transition: opacity var(--transition);
}
.acad-link-active:hover { opacity: 0.7; }

.acad-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: auto;
}

/* ===== CONTACT ===== */
.contact-section {
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.contact-section::before {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(59,130,246,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.contact-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 40px;
}

.contact-heading {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  margin: 16px 0 12px;
}
.contact-sub {
  max-width: 420px;
  color: var(--text-2);
  font-size: 1rem;
  margin-bottom: 16px;
}
.contact-signoff {
  margin-bottom: 0;
  font-size: 1rem;
}

.contact-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.contact-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}
.contact-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
}
.contact-btn-icon {
  font-size: 1rem;
  color: var(--blue);
  width: 20px;
  text-align: center;
}

/* ===== FOOTER ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-copy, .footer-loc {
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
}

/* ===== REVEAL ANIMATIONS ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .academic-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-mobile-btn { display: flex; align-items: center; justify-content: center; }

  .pillars-grid { grid-template-columns: 1fr; gap: 0; }
  .pillar { border-right: none; border-bottom: 1px solid var(--border); }
  .pillar:last-child { border-bottom: none; }

  .work-grid, .work-grid.three-col { grid-template-columns: 1fr; }

  .thinking-featured { grid-template-columns: 1fr; }
  .thinking-grid { grid-template-columns: 1fr; }

  .award-row {
    grid-template-columns: 60px 1fr;
    gap: 16px;
  }
  .award-org { display: none; }

  .academic-grid { grid-template-columns: repeat(2, 1fr); }

  .company-header { flex-direction: column; gap: 8px; }
}

@media (max-width: 480px) {
  .academic-grid { grid-template-columns: 1fr; }
  .hero-name { letter-spacing: -0.03em; }
  .section { padding: 72px 0; }
}