:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f5;
  --bg-muted: #f2f2ef;
  --ink: #111418;
  --ink-soft: #3a3f47;
  --ink-muted: #6b7280;
  --line: #e6e6e2;
  --line-strong: #d4d4cf;
  --accent: #1f3a5f;
  --accent-soft: #e8eef6;
  --accent-ink: #16304f;
  --max: 1120px;
  --radius: 4px;
  --shadow-sm: 0 1px 2px rgba(17, 20, 24, 0.04);
  --shadow-md: 0 4px 14px rgba(17, 20, 24, 0.06);
  --serif: "Source Serif Pro", "Georgia", "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 120ms ease;
}

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

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.2;
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.1rem, 4.2vw, 3rem);
}

h2 {
  font-size: clamp(1.55rem, 2.6vw, 1.95rem);
}

h3 {
  font-size: 1.15rem;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: -0.005em;
}

p {
  margin: 0 0 1em;
  color: var(--ink-soft);
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  max-width: var(--max);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  width: 26px;
  height: 26px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 8px 12px;
  color: var(--ink-soft);
  font-size: 0.93rem;
  border-radius: var(--radius);
  transition: color 120ms ease, background 120ms ease;
}

.nav-links a:hover {
  color: var(--ink);
  background: var(--bg-soft);
}

.nav-links a.active {
  color: var(--ink);
  background: var(--bg-soft);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--ink);
}

/* ---------- Hero ---------- */
.hero {
  padding: 88px 0 56px;
  border-bottom: 1px solid var(--line);
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 18px;
}

.hero h1 {
  max-width: 880px;
  margin-bottom: 20px;
}

.hero-lede {
  max-width: 680px;
  font-size: 1.08rem;
  color: var(--ink-soft);
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.btn:hover {
  background: var(--bg-soft);
  color: var(--ink);
  border-color: var(--ink-muted);
}

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

.btn-primary:hover {
  background: var(--accent-ink);
  border-color: var(--accent-ink);
  color: #fff;
}

.btn .arr {
  transition: transform 160ms ease;
}

.btn:hover .arr {
  transform: translateX(2px);
}

/* ---------- Quick facts ---------- */
.quick-facts {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.fact {
  padding: 22px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.fact-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  margin-bottom: 8px;
}

.fact-value {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- Section ---------- */
section {
  padding: 72px 0;
  border-bottom: 1px solid var(--line);
}

section:last-of-type {
  border-bottom: none;
}

.section-head {
  margin-bottom: 36px;
  max-width: 720px;
}

.section-eyebrow {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
}

.section-head p {
  font-size: 1rem;
  color: var(--ink-soft);
  margin-top: 8px;
}

/* ---------- Project cards ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
  color: var(--ink);
}

.project-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--ink);
}

.project-visual {
  aspect-ratio: 16 / 9;
  margin: -28px -28px 22px;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--line);
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
  position: relative;
}

.project-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.project-card h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--ink);
}

.project-card p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin-bottom: 18px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.tag {
  font-size: 0.76rem;
  color: var(--ink-soft);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- Experience ---------- */
.exp-list {
  display: grid;
  gap: 4px;
}

.exp-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.exp-row:last-child {
  border-bottom: 1px solid var(--line);
}

.exp-meta {
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.exp-role {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 4px;
}

.exp-org {
  font-size: 0.92rem;
  color: var(--accent);
  margin-bottom: 10px;
}

.exp-body p {
  margin-bottom: 12px;
}

.exp-body ul {
  margin: 0;
  padding-left: 18px;
}

.exp-body li {
  color: var(--ink-soft);
  margin-bottom: 6px;
  font-size: 0.95rem;
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.skill-group {
  padding: 28px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.skill-group h3 {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.skill-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.skill-group li {
  color: var(--ink-soft);
  font-size: 0.92rem;
  padding-left: 14px;
  position: relative;
}

.skill-group li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
}

/* ---------- About focus cards ---------- */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.focus-card {
  padding: 24px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.focus-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.focus-card h3 {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink);
}

.focus-card p {
  font-size: 0.9rem;
  margin: 0;
}

/* ---------- CTA block ---------- */
.cta {
  padding: 72px 0;
  text-align: center;
  background: var(--bg-soft);
}

.cta h2 {
  max-width: 640px;
  margin: 0 auto 18px;
}

.cta p {
  max-width: 560px;
  margin: 0 auto 24px;
  color: var(--ink-soft);
}

/* ---------- Footer ---------- */
footer {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.footer-inner a {
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  gap: 22px;
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ---------- Page header (interior pages) ---------- */
.page-header {
  padding: 80px 0 48px;
  border-bottom: 1px solid var(--line);
}

.page-header h1 {
  max-width: 780px;
  margin-bottom: 14px;
}

.page-header p {
  max-width: 680px;
  font-size: 1.05rem;
  color: var(--ink-soft);
}

/* ---------- Project detail block ---------- */
.project-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.project-detail:last-of-type {
  border-bottom: none;
}

.project-detail .visual {
  aspect-ratio: 4 / 3;
  background: var(--bg-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.project-detail h2 {
  font-family: var(--serif);
  font-size: 1.55rem;
  margin-bottom: 12px;
}

.project-detail .tagline {
  font-style: italic;
  color: var(--ink-soft);
  font-size: 1rem;
  margin-bottom: 20px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
}

.project-detail h4 {
  font-family: var(--sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  margin: 24px 0 10px;
  font-weight: 600;
}

.project-detail ul {
  padding-left: 18px;
  margin: 0;
}

.project-detail ul li {
  color: var(--ink-soft);
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.project-detail .showcase {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

/* ---------- Imaging illustrations (inline SVG frames) ---------- */
.imaging-frame {
  width: 100%;
  height: 100%;
  display: block;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info {
  padding: 28px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.contact-row {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-row .label {
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

.contact-row .value {
  font-size: 1rem;
  color: var(--ink);
}

/* ---------- Utility ---------- */
.tight {
  max-width: 680px;
}

.lede {
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.divider {
  height: 1px;
  background: var(--line);
  margin: 40px 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    padding: 12px 24px;
    gap: 2px;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    padding: 12px 8px;
    border-bottom: 1px solid var(--line);
  }
  .nav-links a:last-child {
    border-bottom: none;
  }
  .facts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .focus-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .exp-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .project-detail {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  section {
    padding: 56px 0;
  }
  .hero {
    padding: 64px 0 44px;
  }
}

@media (max-width: 480px) {
  .facts-grid {
    grid-template-columns: 1fr;
  }
  .focus-grid {
    grid-template-columns: 1fr;
  }
  .container {
    padding: 0 20px;
  }
}