:root {
  --bg: #ffffff;
  --text: #000000;
  --muted: #3f3f3f;
  --card: #ffffff;
  --line: #a0a0a0;
  --accent: #000000;
  --blue: #000000;
  --blue-soft: rgba(160, 160, 160, 0.18);
  --radius: 22px;
  --shadow: none;
}

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

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: #ffffff;
  border-bottom: 1px solid #a0a0a0;
}

.nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 850;
  text-decoration: none;
  letter-spacing: -0.035em;
}

.nav-links {
  display: flex;
  gap: 1rem;
  color: #000000;
  font-size: 0.95rem;
  flex-wrap: wrap;
}

.nav-links a { text-decoration: none; }

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.hero {
  min-height: 72vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 2rem;
  align-items: center;
}

.page-hero {
  padding: 5rem 0 2rem;
  max-width: 900px;
}

.eyebrow, .label {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 850;
  color: var(--blue);
  font-size: 0.78rem;
}

h1, h2, h3 {
  line-height: 1.12;
  letter-spacing: -0.045em;
  margin: 0 0 1rem;
}

h1 { font-size: clamp(3rem, 7.2vw, 6rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.45rem); }
h3 { font-size: 1.18rem; }

.subtitle {
  max-width: 790px;
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  color: var(--muted);
  margin-bottom: 1.35rem;
}

.role-list {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0 2rem;
}

.role-list p {
  margin: 0;
  padding-left: 1rem;
  border-left: 4px solid var(--accent);
  color: var(--muted);
}

.role-list strong { color: var(--text); }

.hero-actions, .inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.82rem 1.15rem;
  font-weight: 780;
  text-decoration: none;
  border: 1px solid var(--line);
}

.primary {
  background: #000000;
  color: #a0a0a0;
  border-color: #000000;
}

.secondary { background: #ffffff; color: #000000; border-color: #a0a0a0; }

.qr-card, .card, .notice {
  background: var(--card);
  border: 1px solid #a0a0a0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.qr-card {
  padding: 1.25rem;
  text-align: center;
}

.qr-card img {
  width: 100%;
  max-width: 240px;
  border-radius: 18px;
  background: #ffffff;
}

.qr-card p {
  margin: 0.75rem 0 0.2rem;
  font-weight: 850;
}

.qr-card code { color: var(--muted); }

.notice {
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}

.inline-links a {
  color: var(--blue);
  font-weight: 800;
}

.grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  padding: 2rem;
  margin-top: 1.25rem;
}

.grid .card { margin-top: 0; }
.card p, .card li, .notice p { color: var(--muted); }
ul { padding-left: 1.2rem; }

.method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.method-grid article {
  border: 1px solid var(--line);
  background: rgba(160, 160, 160, 0.10);
  border-radius: 18px;
  padding: 1.25rem;
}

.method-grid p { margin-bottom: 0; }

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.pill-row span {
  background: var(--blue-soft);
  color: #000000;
  border: 1px solid #a0a0a0;
  padding: 0.55rem 0.78rem;
  border-radius: 999px;
  font-weight: 760;
  font-size: 0.9rem;
}

pre {
  background: #000000;
  color: #a0a0a0;
  padding: 1rem;
  border-radius: 16px;
  overflow-x: auto;
}

.publication {
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
}

.publication:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.publication p { margin: 0 0 0.35rem; }

.publication a, .card a {
  font-weight: 780;
  color: var(--blue);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline div {
  display: grid;
  grid-template-columns: 145px minmax(0, 1fr);
  gap: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.timeline div:first-child { border-top: 0; padding-top: 0; }

.timeline span {
  color: var(--blue);
  font-weight: 850;
}

.timeline p { margin: 0; }
.detailed p { color: var(--muted); }
.detailed strong { color: var(--text); }

.inner-grid {
  margin-top: 0;
}

.education {
  border-top: 1px solid var(--line);
  margin-top: 1.25rem;
  padding-top: 1.25rem;
}

.talks li { margin-bottom: 0.55rem; }

.footer {
  text-align: center;
  color: var(--muted);
  padding: 2rem 1rem;
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero, .two, .notice, .method-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .hero {
    min-height: auto;
    padding: 3rem 0 1rem;
  }

  .notice { align-items: start; }

  .timeline div {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}


.feature-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 1.5rem;
  align-items: start;
}

.image-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(160, 160, 160, 0.10);
}

.image-card img {
  display: block;
  width: 100%;
  height: auto;
}

.image-card figcaption {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 0.8rem 1rem;
}

.format-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.format-grid article {
  border: 1px solid var(--line);
  background: rgba(160, 160, 160, 0.10);
  border-radius: 18px;
  padding: 1.1rem;
}

.inline-cta {
  margin-top: 1.25rem;
}

@media (max-width: 900px) {
  .feature-split, .format-grid {
    grid-template-columns: 1fr;
  }
}


.contact-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.45rem;
  color: var(--text);
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.85rem 0.95rem;
  font: inherit;
  color: var(--text);
  background: #ffffff;
  box-sizing: border-box;
}

.contact-form textarea {
  resize: vertical;
  min-height: 150px;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 3px solid rgba(0, 0, 0, 0.20);
  border-color: var(--accent);
}

.form-note {
  margin: 0;
  color: #000000;
  font-size: 0.95rem;
}

@media (max-width: 700px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}


/* Minimal black, grey, and white palette */
body { background: #ffffff; color: #000000; }
.site-header { background: #ffffff; }
.card, .notice, .qr-card { background: #ffffff; border-color: #a0a0a0; }
.button.primary, button.primary { background: #000000; color: #a0a0a0; border-color: #000000; }
.button.secondary { background: #ffffff; color: #000000; border-color: #a0a0a0; }
.button:hover { text-decoration: underline; }
.contact-form button, .contact-form .button { background: #000000; color: #a0a0a0; border-color: #000000; }
.contact-form input, .contact-form select, .contact-form textarea { background: #ffffff; color: #000000; border-color: #a0a0a0; }
::placeholder { color: #3f3f3f; opacity: 0.75; }

.availability {
  font-weight: 700;
  color: var(--ink);
  margin: 0.8rem 0 1rem;
}