:root {
  --paper: #eef2f7;
  --paper-2: #e4eaf2;
  --ink: #0c1222;
  --ink-soft: #2a3444;
  --muted: #5c6776;
  --line: rgba(12, 18, 34, 0.14);
  --accent: #1d4ed8;
  --accent-deep: #1e3a8a;
  --night: #070b14;
  --night-2: #111827;
  --cream: #f8fafc;
  --cream-dim: #c5d0dc;
  --serif: "Sora", "Outfit", sans-serif;
  --sans: "Outfit", "Avenir Next", "Segoe UI", sans-serif;
  --max: 1180px;
  --header: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(900px 420px at 0% 18%, rgba(37, 99, 235, 0.08), transparent 55%),
    radial-gradient(700px 380px at 100% 70%, rgba(37, 99, 235, 0.05), transparent 50%),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input { font: inherit; }
.skip {
  position: absolute;
  left: 1rem;
  top: -40px;
  background: var(--cream);
  color: var(--ink);
  padding: 0.5rem 0.8rem;
  z-index: 100;
}
.skip:focus { top: 0.6rem; }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 60;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.4rem;
  background: rgba(7, 11, 20, 0.92);
  color: var(--cream);
  backdrop-filter: blur(18px);
  z-index: 50;
  border-bottom: 1px solid rgba(248, 250, 252, 0.08);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--cream);
}
.brand-mark {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(248, 250, 252, 0.35);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-weight: 560;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.brand-name {
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.95rem;
}
.nav-links a {
  text-decoration: none;
  color: var(--cream-dim);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav-links a:hover,
.nav-links a:focus-visible { color: var(--cream); }
.nav-toggle {
  display: none;
  background: transparent;
  color: var(--cream);
  border: 1px solid rgba(248, 250, 252, 0.3);
  width: 42px;
  height: 42px;
  padding: 0;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--cream);
  position: relative;
  margin: 0 auto;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }

.hero {
  background:
    radial-gradient(520px 420px at 78% 42%, rgba(37, 99, 235, 0.28), transparent 62%),
    radial-gradient(900px 480px at 12% 0%, rgba(147, 197, 253, 0.08), transparent 55%),
    linear-gradient(180deg, #0b1220 0%, #100e0c 70%, #0f172a 100%);
  color: var(--cream);
  padding: calc(var(--header) + 1.6rem) 1.4rem 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
.hero-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 3rem;
  align-items: center;
  flex: 1;
}
.hero-grid > * { min-width: 0; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: #93c5fd;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.75rem;
  margin: 0 0 1.2rem;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: #93c5fd;
}
h1 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(3.4rem, 7vw, 6.4rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  margin: 0 0 1.4rem;
}
h1 em {
  font-style: normal;
  font-weight: 500;
  color: #93c5fd;
}
.lede {
  max-width: 38rem;
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--cream-dim);
  margin: 0 0 1.6rem;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  color: #9aabc0;
  font-size: 0.92rem;
  margin-bottom: 1.8rem;
}
.hero-meta span:not(:last-child) { white-space: nowrap; }
.hero-meta span:not(:last-child)::after {
  content: "·";
  margin: 0 0.75rem;
  color: #64748b;
}
.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; max-width: 100%; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  min-height: 46px;
  padding: 0.7rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--cream); color: var(--night); }
.btn-primary:hover { background: #fff; }
.btn-ghost { border-color: rgba(248, 250, 252, 0.28); color: var(--cream); }
.btn-ghost:hover { border-color: var(--cream); }
.btn-ink { background: var(--ink); color: var(--cream); }
.btn-ink:hover { background: #000; }
.btn-line { border-color: var(--line); color: var(--ink); }
.btn-line:hover { border-color: var(--ink); }

.portrait {
  justify-self: end;
  width: min(100%, 340px);
}
.portrait-frame {
  position: relative;
  padding: 10px;
  border-radius: 28px;
  background: linear-gradient(160deg, rgba(147, 197, 253, 0.85), rgba(37, 99, 235, 0.25) 45%, rgba(248, 250, 252, 0.15));
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
}
.portrait img {
  width: 100%;
  height: min(58vh, 520px);
  object-fit: cover;
  object-position: center 15%;
  border-radius: 20px;
  filter: grayscale(0.15) contrast(1.05);
}
.portrait figcaption {
  margin-top: 1.3rem;
  color: #9aabc0;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stat-rail {
  width: min(var(--max), 100%);
  margin: 2.2rem auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  padding-bottom: 1.6rem;
}
.stat {
  padding: 1.15rem 1.1rem 1.2rem;
  border-radius: 18px;
  background: rgba(248, 250, 252, 0.06);
  border: 1px solid rgba(248, 250, 252, 0.1);
}
.stat b {
  display: block;
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.4rem;
}
.stat span { color: #9aabc0; font-size: 0.88rem; }

.section {
  width: min(var(--max), 100%);
  margin: 0 auto;
  padding: 5.5rem 1.4rem;
  scroll-margin-top: 84px;
}
.section-kicker {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  border-top: 1px solid var(--ink);
  padding-top: 0.8rem;
  margin-bottom: 2rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--muted);
}
.section h2 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 1rem;
}
.section-intro {
  max-width: 42rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
  margin: 0 0 2.5rem;
}

.case {
  display: grid;
  grid-template-columns: 92px 1.4fr 0.9fr;
  gap: 1.4rem;
  padding: 1.5rem 1.4rem;
  margin-bottom: 0.9rem;
  background: rgba(255, 253, 248, 0.86);
  border: 1px solid rgba(12, 18, 34, 0.08);
  border-radius: 22px;
  box-shadow: 0 16px 40px rgba(12, 18, 34, 0.05);
}
.case:last-child { margin-bottom: 0; }
.case-index {
  font-family: var(--serif);
  font-style: normal;
  font-weight: 600;
  font-size: 1.4rem;
  color: var(--accent);
}
.case-org {
  display: block;
  margin-top: 0.45rem;
  font-style: normal;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.case h3 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(1.6rem, 2.4vw, 2.15rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.8rem;
}
.case p { margin: 0 0 1rem; color: var(--ink-soft); }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tags span {
  border: 0;
  border-radius: 8px;
  padding: 0.38rem 0.62rem;
  font-size: 0.8rem;
  color: #16325c;
  background: #e8f0fe;
}
.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; align-content: start; }
.metrics div {
  background: #fff;
  border-radius: 14px;
  padding: 0.7rem 0.75rem;
  border: 1px solid rgba(12, 18, 34, 0.06);
}
.metrics div b {
  display: block;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 560;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--accent-deep);
}
.metrics div span { color: var(--muted); font-size: 0.86rem; }

.also {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.also article {
  background: #ffffff;
  border: 1px solid rgba(12, 18, 34, 0.08);
  border-radius: 18px;
  padding: 1.3rem 1.2rem 1.4rem;
  box-shadow: 0 10px 28px rgba(12, 18, 34, 0.04);
}
.also h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 560;
  margin: 0.3rem 0 0.6rem;
}
.also p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }
.also .org {
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent-deep);
}

.role {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.5rem;
  padding: 1.8rem 0;
  border-top: 1px solid var(--line);
}
.role:last-child { border-bottom: 1px solid var(--line); }
.role time { color: var(--muted); font-size: 0.92rem; display: block; }
.role h3 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 560;
}
.role .company {
  font-family: var(--serif);
  font-style: normal;
  font-weight: 500;
  font-size: 1.35rem;
  margin-top: 0.15rem;
  color: var(--accent-deep);
}
.role ul { margin: 0.8rem 0 0; padding: 0; list-style: none; }
.role li {
  position: relative;
  padding-left: 1rem;
  margin: 0.45rem 0;
  color: var(--ink-soft);
}
.role li::before {
  content: "";
  width: 6px;
  height: 1px;
  background: var(--accent);
  position: absolute;
  left: 0;
  top: 0.7rem;
}

.lab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.lab-card {
  border: 1px solid rgba(12, 18, 34, 0.08);
  background: #ffffff;
  border-radius: 20px;
  padding: 1.4rem 1.3rem 1.3rem;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  box-shadow: 0 12px 30px rgba(12, 18, 34, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.lab-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(12, 18, 34, 0.08);
}
.lab-card h3 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  margin: 0.35rem 0 0.55rem;
}
.lab-card p { margin: 0 0 1rem; color: var(--ink-soft); flex: 1; }
.year {
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent-deep);
}
.card-links { display: flex; gap: 1rem; }
.card-links a {
  color: var(--ink);
  font-size: 0.9rem;
  text-underline-offset: 3px;
}
.card-links a:hover { color: var(--accent-deep); }

.skill-block {
  margin: 0 0 0.8rem;
  background: #fff;
  border: 1px solid rgba(12, 18, 34, 0.08);
  border-radius: 16px;
  padding: 1rem 1.1rem 1.1rem;
  box-shadow: 0 8px 24px rgba(12, 18, 34, 0.04);
}
.skill-block h3 {
  margin: 0 0 0.7rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}
.interest-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}
.interest-row article {
  border-top: 1px solid var(--ink);
  padding-top: 0.9rem;
}
.interest-row h3 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: 1.4rem;
  margin: 0 0 0.4rem;
}
.interest-row p { margin: 0; color: var(--ink-soft); }

.edu {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}
.edu:last-of-type { border-bottom: 1px solid var(--line); margin-bottom: 2rem; }
.edu strong { font-weight: 560; }
.edu span { color: var(--muted); }

.cert-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
}
.cert-grid a, .cert-list a {
  text-decoration: none;
}
.cert-grid a {
  display: block;
  border: 1px solid rgba(12, 18, 34, 0.08);
  background: #ffffff;
  border-radius: 16px;
  padding: 1rem 1rem 0.9rem;
  box-shadow: 0 8px 22px rgba(12, 18, 34, 0.03);
}
.cert-grid a:hover, .cert-list a:hover { border-color: var(--ink); }
.cert-grid small, .cert-list small {
  display: block;
  color: var(--accent-deep);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.7rem;
  margin-bottom: 0.25rem;
}
.cert-grid strong { font-weight: 520; }
.cert-list {
  margin-top: 0.7rem;
  display: grid;
  gap: 0;
}
.cert-list a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}
.more-certs {
  margin-top: 1rem;
}
.more-certs summary {
  cursor: pointer;
  color: var(--accent-deep);
  letter-spacing: 0.04em;
}

.contact {
  background: var(--night);
  color: var(--cream);
  scroll-margin-top: 72px;
}
.contact .section { padding-bottom: 4rem; }
.contact .section-kicker { border-top-color: rgba(248, 250, 252, 0.3); color: #9aabc0; }
.contact h2 { max-width: 16ch; }
.contact-mail {
  font-family: var(--serif);
  font-style: normal;
  font-weight: 500;
  font-size: clamp(1.35rem, 4vw, 2.4rem);
  color: #93c5fd;
  text-decoration: none;
  display: inline-block;
  max-width: 100%;
  overflow-wrap: anywhere;
  margin: 0.4rem 0 1.2rem;
}
.contact-mail:hover { color: #fff; }
.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
  margin-bottom: 1.6rem;
}
.contact-row a { color: var(--cream-dim); }
.contact-row a:hover { color: var(--cream); }
.assistant-wrap {
  background:
    radial-gradient(700px 320px at 90% 0%, rgba(37, 99, 235, 0.16), transparent 60%),
    linear-gradient(180deg, #f7f1e8 0%, #e7eef7 100%);
  scroll-margin-top: 72px;
}
.assistant {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1.5rem;
  align-items: stretch;
}
.assistant-copy p { color: var(--ink-soft); max-width: 38rem; }
.prompt-label {
  margin: 1.4rem 0 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--accent-deep);
}
.prompts {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}
.prompts li {
  background: #ffffff;
  border: 1px solid rgba(12, 18, 34, 0.08);
  border-radius: 14px;
  padding: 0.75rem 0.9rem;
  color: var(--ink);
}
.chat-stage {
  background: var(--night);
  color: var(--cream);
  border-radius: 24px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  box-shadow: 0 24px 50px rgba(7, 11, 20, 0.22);
  min-height: 100%;
}
.chat-top {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.4rem 0.7rem;
  border-bottom: 1px solid rgba(248, 250, 252, 0.1);
  margin-bottom: 0.3rem;
}
.chat-top strong { font-weight: 560; font-size: 0.95rem; }
.chat-top span:last-child { margin-left: auto; color: #9aabc0; font-size: 0.78rem; }
.chat-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #3ddc84;
  box-shadow: 0 0 0 4px rgba(61, 220, 132, 0.15);
}
.bubble {
  max-width: 92%;
  padding: 0.8rem 0.9rem;
  border-radius: 16px;
  font-size: 0.92rem;
  line-height: 1.45;
}
.bubble.user {
  margin-left: auto;
  background: rgba(248, 250, 252, 0.1);
  border-bottom-right-radius: 5px;
}
.bubble.bot {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.28), rgba(37, 99, 235, 0.12));
  border: 1px solid rgba(147, 197, 253, 0.2);
  border-bottom-left-radius: 5px;
}
.chat-continue {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 999px;
  text-decoration: none;
  background: var(--cream);
  color: var(--night);
  font-size: 0.92rem;
}
.chat-continue:hover { background: #fff; }

.site-footer {
  background: var(--night);
  color: #8b97a8;
  padding: 0 1.4rem 2rem;
}
.site-footer div {
  width: min(var(--max), 100%);
  margin: 0 auto;
  border-top: 1px solid rgba(248, 250, 252, 0.12);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
}

@media (max-width: 980px) {
  .hero-grid, .case, .role, .also, .lab-grid, .interest-row, .cert-grid, .assistant {
    grid-template-columns: 1fr;
  }
  .metrics { grid-template-columns: 1fr 1fr; }
  .portrait { justify-self: start; width: min(100%, 320px); margin-top: 1rem; }
  .stat-rail { grid-template-columns: 1fr 1fr; }
  .edu { grid-template-columns: 1fr; gap: 0.15rem; }
  .nav-toggle { display: grid; place-items: center; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--header);
    left: 0;
    right: 0;
    background: var(--night);
    flex-direction: column;
    align-items: flex-start;
    padding: 0.6rem 1.4rem 1.2rem;
    border-bottom: 1px solid rgba(248, 250, 252, 0.08);
    gap: 0.2rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.7rem 0; width: 100%; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .stat-rail { grid-template-columns: 1fr; }
  .brand-name { display: none; }
  .site-footer div { flex-direction: column; }
  .cert-list a { flex-direction: column; gap: 0.15rem; }
  .actions .btn { flex: 1 1 calc(50% - 0.7rem); }
  .portrait img { height: auto; aspect-ratio: 4 / 5; }
  h1 { font-size: 3.15rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}