@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');

:root {
  --bg-base: #FFFFFF;
  --bg-surface: #FFF4F4;
  --bg-surface-elevated: #FFFFFF;

  --text-primary: #231F20;
  --text-secondary: #5A5A5A;
  --text-muted: #777677;

  --accent-primary: #7A0019;
  --accent-primary-dark: #5B0013;
  --accent-secondary: #FFD424;

  --accent-navy: #002A5C;
  --accent-teal: #00759A;

  --border-color: #D5D6D2;
  --border-glow: rgba(122, 0, 25, 0.45);
  --accent-glow: rgba(122, 0, 25, 0.18);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 99px;

  --max-width: 1040px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 15% 50%, rgba(122, 0, 25, 0.04), transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(255, 212, 36, 0.06), transparent 25%);
}

h1, h2, h3, h4 {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.25;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover { color: var(--accent-primary-dark); }

img { max-width: 100%; display: block; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.site-header__inner {
  width: 100%;
  max-width: var(--max-width);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
}

.brand__chip {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-dark));
  color: var(--accent-secondary);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.5px;
}

.brand__name {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.95rem;
}

.nav a {
  color: var(--text-secondary);
  font-weight: 500;
}

.nav a:hover { color: var(--accent-primary); }

/* ---------- Sections ---------- */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 4rem 0;
  scroll-margin-top: 80px;
}

.section + .section { border-top: 1px solid var(--border-color); }

.section__eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
}

.section__title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

/* ---------- Hero ---------- */

.hero {
  padding: 4.5rem 0 3.5rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__name {
  font-size: 2.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.5px;
}

.hero__role {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.hero__role strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero__cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero__photo {
  display: flex;
  justify-content: center;
}

.hero__photo img {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-surface);
  box-shadow: 0 8px 32px 0 rgba(35, 31, 32, 0.10), 0 0 0 1px var(--border-color);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

.btn svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}

.btn--primary {
  background: var(--accent-primary);
  color: #FFFFFF;
}

.btn--primary:hover {
  background: var(--accent-primary-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--accent-glow);
}

.btn--ghost {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn--ghost:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(35, 31, 32, 0.06);
}

/* ---------- Cards ---------- */

.card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: 0 4px 16px 0 rgba(35, 31, 32, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card--blush { background: var(--bg-surface); }

.card--accent {
  border-left: 4px solid var(--accent-primary);
  padding-left: 1.5rem;
}

.bio p + p { margin-top: 1rem; }

.bio p { color: var(--text-primary); font-size: 1.05rem; }

/* ---------- Research interests ---------- */

.interests {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.interest {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.interest__tag {
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.interest__tag--current {
  background: rgba(122, 0, 25, 0.08);
  color: var(--accent-primary);
  border: 1px solid rgba(122, 0, 25, 0.2);
}

.interest__tag--past {
  background: rgba(0, 42, 92, 0.08);
  color: var(--accent-navy);
  border: 1px solid rgba(0, 42, 92, 0.2);
}

.interest h3 {
  font-size: 1.1rem;
}

.interest p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ---------- Project card ---------- */

.project-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: center;
}

.project-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-dark));
  color: var(--accent-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.project-card__icon svg { width: 28px; height: 28px; stroke-width: 2; }

.project-card__title {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.project-card__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.project-card__links {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* ---------- Contact ---------- */

.contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.contact p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 540px;
}

.contact__buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--accent-primary); }

/* ---------- Responsive ---------- */

@media (max-width: 760px) {
  .site-header__inner { padding: 0.875rem 1.25rem; }
  main { padding: 0 1.25rem; }
  .nav { gap: 1rem; font-size: 0.875rem; }
  .nav a:not(.brand__name) { display: none; }
  .nav .nav__contact { display: inline-flex; }

  .hero {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2.5rem 0 2rem;
    text-align: center;
  }
  .hero__cta { justify-content: center; }
  .hero__photo { order: -1; }
  .hero__photo img { width: 180px; height: 180px; }
  .hero__name { font-size: 2.25rem; }

  .section { padding: 2.75rem 0; }
  .section__title { font-size: 1.5rem; }
  .interests { grid-template-columns: 1fr; }
  .project-card { grid-template-columns: 1fr; text-align: center; }
  .project-card__icon { margin: 0 auto; }
  .project-card__links { justify-content: center; }
}