:root {
  --paper: #f4f1e9;
  --paper-deep: #ebe5d9;
  --ink: #142840;
  --muted: #5f6b73;
  --teal: #16767b;
  --teal-dark: #0d555a;
  --line: rgba(20, 40, 64, 0.16);
  --white: #fffefb;
  --shadow: 0 24px 70px rgba(28, 41, 49, 0.11);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% 8%, rgba(22, 118, 123, 0.10), transparent 25rem),
    var(--paper);
  font-family: "Noto Sans SC", system-ui, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.page-shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }

.site-header {
  width: min(1240px, calc(100% - 48px));
  height: 92px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.brand {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font: 600 14px/1 "Newsreader", serif;
  letter-spacing: 0.08em;
}

nav { display: flex; gap: 36px; font-size: 14px; }
nav a, .contact-link { transition: color 160ms ease; }
nav a:hover, .contact-link:hover { color: var(--teal); }
.contact-link { justify-self: end; font-size: 14px; }

.hero {
  min-height: 650px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.65fr);
  gap: 88px;
  align-items: center;
  padding-block: 80px;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 4px;
  font-family: "Newsreader", "Noto Sans SC", serif;
  font-size: clamp(64px, 9vw, 118px);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.hero-role {
  margin: 26px 0;
  font-family: "Newsreader", "Noto Sans SC", serif;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.22;
  letter-spacing: -0.035em;
}

.hero-intro { max-width: 660px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }

.button {
  min-width: 132px;
  padding: 13px 22px;
  border-radius: 999px;
  text-align: center;
  font-size: 14px;
  transition: transform 160ms ease, background 160ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--ink); }
.button-quiet { border: 1px solid var(--line); background: rgba(255,255,255,0.38); }

.hero-card {
  min-height: 360px;
  padding: 38px;
  border-radius: 4px 48px 4px 48px;
  color: var(--white);
  background: var(--ink);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
}
.hero-card::before {
  content: "BUCT";
  position: absolute;
  top: -12px;
  right: -4px;
  color: rgba(255,255,255,0.055);
  font: 600 92px/1 "Newsreader", serif;
}
.hero-card-mark {
  position: absolute;
  top: 28px;
  left: 30px;
  padding: 6px 12px;
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 999px;
  color: rgba(255,255,255,0.72);
  font-size: 12px;
}
.hero-card p { margin-bottom: 28px; color: #80cdd0; font-size: 12px; letter-spacing: 0.15em; line-height: 1.5; }
.hero-card strong { font-size: 28px; font-weight: 600; }
.hero-card span { margin-top: 4px; color: rgba(255,255,255,0.68); font-size: 13px; }
.hero-card small { color: rgba(255,255,255,0.6); }
.card-rule { height: 1px; margin: 26px 0 18px; background: rgba(255,255,255,0.2); }

.statement {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 28px;
  align-items: start;
  padding: 62px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-index { color: var(--teal); font-size: 12px; letter-spacing: 0.16em; }
.statement p { max-width: 850px; margin: 0; font-family: "Newsreader", "Noto Sans SC", serif; font-size: clamp(30px, 4vw, 52px); line-height: 1.25; }

.section { padding-block: 112px; }
.section-heading { margin-bottom: 48px; }
.section-heading h2, .closing h2 { margin: 0; font-family: "Newsreader", "Noto Sans SC", serif; font-size: clamp(40px, 5vw, 68px); line-height: 1.1; letter-spacing: -0.035em; }

.education-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 72px; }
.education-main { padding: 42px; border: 1px solid var(--line); background: rgba(255,255,255,0.38); }
.meta { color: var(--teal); font-size: 12px; letter-spacing: 0.08em; }
.education-main h3 { margin-bottom: 4px; font-size: 32px; }
.degree { color: var(--muted); }
.education-main > p:last-child { margin: 42px 0 0; padding-top: 28px; border-top: 1px solid var(--line); color: var(--muted); }
.education-notes { border-top: 1px solid var(--line); }
.education-notes article { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.education-notes span { color: var(--teal); font-weight: 600; }
.education-notes p { margin: 0; color: var(--muted); }

.section-tint { background: var(--paper-deep); }
.heading-row { display: flex; align-items: end; justify-content: space-between; gap: 32px; }
.heading-note { max-width: 360px; margin-bottom: 6px; color: var(--muted); }
.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.project-card { min-height: 320px; padding: 34px; border: 1px solid var(--line); background: rgba(255,255,255,0.44); display: flex; flex-direction: column; }
.project-featured { color: var(--white); background: var(--ink); }
.project-topline { display: flex; justify-content: space-between; color: var(--teal); font-size: 12px; letter-spacing: 0.1em; }
.project-featured .project-topline { color: #80cdd0; }
.project-card h3 { margin: 56px 0 14px; font: 600 32px/1.15 "Newsreader", "Noto Sans SC", serif; }
.project-card p { color: var(--muted); }
.project-featured p, .project-featured li { color: rgba(255,255,255,0.68); }
.project-card ul { margin: 0 0 22px; padding-left: 20px; font-size: 13px; }
.project-card a { width: fit-content; margin-top: auto; padding-bottom: 3px; border-bottom: 1px solid currentColor; font-size: 13px; }

.timeline { border-top: 1px solid var(--line); }
.timeline article { display: grid; grid-template-columns: 220px 1fr; gap: 40px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.timeline time { color: var(--teal); font-size: 13px; }
.timeline h3 { margin-bottom: 6px; font-size: 20px; }
.timeline p { margin: 0; color: var(--muted); }

.closing { padding-block: 100px 120px; text-align: center; }
.closing .eyebrow { margin-bottom: 16px; }
.closing-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 26px; margin-top: 38px; color: var(--teal-dark); font-size: 14px; }
.closing-links a { border-bottom: 1px solid rgba(13,85,90,0.3); }

footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 86px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 12px; }
.footer-inner a:hover { color: var(--teal); }

@media (max-width: 820px) {
  .page-shell, .site-header { width: min(100% - 30px, 1120px); }
  .site-header { height: 74px; grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 42px; padding-block: 56px 72px; }
  .hero-intro { font-size: 15px; }
  .hero-card { min-height: 300px; }
  .statement { grid-template-columns: 1fr; gap: 16px; padding-block: 46px; }
  .section { padding-block: 78px; }
  .education-grid, .project-grid { grid-template-columns: 1fr; gap: 16px; }
  .education-grid { gap: 36px; }
  .heading-row { display: block; }
  .heading-note { margin-top: 20px; }
  .timeline article { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 520px) {
  .page-shell, .site-header { width: calc(100% - 24px); }
  h1 { font-size: 62px; }
  .hero-role { font-size: 34px; }
  .hero-actions { align-items: stretch; }
  .button { min-width: 0; flex: 1; padding-inline: 14px; }
  .hero-card, .education-main, .project-card { padding: 26px; }
  .education-notes article { grid-template-columns: 80px 1fr; }
  .footer-inner { padding-block: 20px; flex-direction: column; justify-content: center; }
}

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