:root {
  --blue-900: #0a2f66;
  --blue-800: #0b3f86;
  --blue-700: #0b4fb3;
  --blue-600: #1769d2;
  --blue-100: #eaf3ff;
  --blue-050: #f5f9ff;
  --ink: #132238;
  --muted: #5d6a7b;
  --line: #dfe7f1;
  --surface: #ffffff;
  --shadow: 0 18px 45px rgba(17, 50, 91, 0.09);
  --radius: 18px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { max-width: 100%; display: block; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 9999;
  background: var(--blue-900);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  text-decoration: none;
}
.skip-link:focus { top: 16px; }

.container {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}
.narrow { max-width: 800px; }
.section { padding: 96px 0; scroll-margin-top: 82px; }
.alt-section { background: var(--blue-050); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(223,231,241,0.85);
}
.nav-wrap {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue-900), var(--blue-600));
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.03em;
  box-shadow: 0 10px 25px rgba(11,79,179,0.22);
}
.nav { display: flex; gap: 22px; align-items: center; }
.nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 650;
  color: #3c4b5e;
}
.nav a:hover, .nav a:focus { color: var(--blue-700); }
.menu-button {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 12px;
  font: inherit;
  font-weight: 700;
}

.hero {
  min-height: calc(100vh - 70px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 85% 20%, rgba(23,105,210,0.12), transparent 28rem),
    linear-gradient(180deg, #fff 0%, #f8fbff 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: 72px;
  align-items: center;
}
.eyebrow, .section-kicker {
  margin: 0 0 12px;
  color: var(--blue-700);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 800;
}
h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(3rem, 7vw, 5.7rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
  color: var(--blue-900);
}
.headline {
  margin: 26px 0 6px;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 750;
  color: #29435f;
}
.location { margin: 0; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 32px; }

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 750;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button.primary {
  background: var(--blue-700);
  color: #fff;
  box-shadow: 0 12px 26px rgba(11,79,179,0.2);
}
.button.primary:hover { background: var(--blue-800); }
.button.secondary { background: #fff; color: var(--blue-800); border-color: #cbd9ea; }
.text-link { color: var(--blue-700); font-weight: 750; text-decoration: none; padding: 10px 4px; }

.portrait-wrap { justify-self: center; text-align: center; }
.portrait {
  width: clamp(230px, 26vw, 320px);
  aspect-ratio: 1;
  border-radius: 32px;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(145deg, rgba(255,255,255,.12), rgba(255,255,255,0)),
    linear-gradient(145deg, var(--blue-900), var(--blue-600));
  box-shadow: 0 28px 70px rgba(10,47,102,0.24);
  border: 8px solid rgba(255,255,255,0.8);
}
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.portrait span { font-size: clamp(4rem, 8vw, 7rem); font-weight: 900; letter-spacing: -0.06em; }
.portrait-note { font-size: 0.82rem; color: var(--muted); margin-top: 14px; }

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: end;
  margin-bottom: 34px;
}
h2 {
  margin: 0;
  color: var(--blue-900);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}
.lead { font-size: clamp(1.05rem, 1.7vw, 1.2rem); color: #34475e; margin: 24px 0 0; }
.section-note { max-width: 440px; margin: 0; color: var(--muted); text-align: right; font-size: 0.92rem; }

.timeline { display: grid; gap: 16px; }
.timeline-item {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: 0 8px 28px rgba(17,50,91,0.04);
}
.timeline-period { color: var(--blue-700); font-weight: 800; }
.timeline-item h3 { margin: 0 0 4px; font-size: 1.15rem; }
.timeline-item .sub { color: #40536a; font-weight: 650; margin: 0 0 8px; }
.timeline-item .detail { color: var(--muted); margin: 0; }

.skills-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.skill-card, .project-card, .cert-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 8px 28px rgba(17,50,91,0.04);
}
.skill-card h3, .project-card h3, .cert-card h3 { margin: 0 0 16px; font-size: 1.05rem; color: var(--blue-900); }
.skill-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--blue-100);
  color: var(--blue-800);
  font-size: 0.82rem;
  font-weight: 700;
}

.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.project-card { display: flex; flex-direction: column; min-height: 310px; }
.project-index { color: var(--blue-600); font-weight: 850; font-size: .8rem; letter-spacing: .08em; }
.project-card h3 { margin-top: 16px; font-size: 1.3rem; }
.project-card p { color: var(--muted); margin: 0 0 22px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 7px; margin-top: auto; }
.project-links { display: flex; gap: 14px; margin-top: 22px; }
.project-links a { color: var(--blue-700); font-weight: 750; text-decoration: none; }

.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cert-card p { margin: 4px 0; color: var(--muted); }
.cert-card a { display: inline-block; margin-top: 10px; color: var(--blue-700); font-weight: 750; text-decoration: none; }

.resume-section { background: linear-gradient(135deg, var(--blue-900), #0d5bc3); color: #fff; }
.resume-card { display: flex; justify-content: space-between; align-items: center; gap: 38px; }
.resume-section .section-kicker { color: #a9ccff; }
.resume-section h2 { color: #fff; }
.resume-section p:not(.section-kicker) { max-width: 680px; color: #d6e7ff; }
.resume-section .button.primary { background: #fff; color: var(--blue-900); box-shadow: none; }
.resume-section .button.secondary { background: transparent; border-color: rgba(255,255,255,.5); color: #fff; }
.resume-actions { display: flex; gap: 12px; flex-shrink: 0; }

.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.contact-card > p { margin-top: 0; color: var(--muted); max-width: 700px; }
.contact-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 26px; }
.contact-item {
  display: flex;
  flex-direction: column;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color .2s ease, transform .2s ease;
}
.contact-item:hover { border-color: #a9c7ef; transform: translateY(-2px); }
.contact-item span { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 800; }
.contact-item strong { margin-top: 4px; color: var(--blue-900); overflow-wrap: anywhere; }

.footer { border-top: 1px solid var(--line); background: #fff; }
.footer-inner { min-height: 90px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: .9rem; }
.footer a { text-decoration: none; color: var(--blue-700); font-weight: 750; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .button, .contact-item { transition: none; }
}

@media (max-width: 920px) {
  .nav {
    display: none;
    position: absolute;
    left: 20px;
    right: 20px;
    top: 62px;
    padding: 18px;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .menu-button { display: inline-flex; }
  .hero { min-height: auto; padding-top: 90px; }
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .portrait-wrap { order: -1; }
  .portrait { width: 220px; border-radius: 26px; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card { min-height: 0; }
  .resume-card { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 650px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 72px 0; }
  .hero { padding-top: 72px; }
  h1 { font-size: clamp(2.65rem, 14vw, 4rem); }
  .section-heading { align-items: flex-start; flex-direction: column; margin-bottom: 24px; }
  .section-note { text-align: left; }
  .timeline-item { grid-template-columns: 1fr; gap: 8px; padding: 22px; }
  .skills-grid, .contact-links, .cert-grid { grid-template-columns: 1fr; }
  .resume-actions { width: 100%; flex-direction: column; }
  .resume-actions .button { width: 100%; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding: 22px 0; }
}