:root {
  --bg: #f8fafc;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --border: rgba(15, 23, 42, 0.1);
  --text: #0f172a;
  --text-muted: rgba(15, 23, 42, 0.65);
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --accent-glow: rgba(37, 99, 235, 0.25);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 60px rgba(2, 6, 23, 0.12);
  --max-width: 1120px;
  --header-height: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

.page-top {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(37, 99, 235, 0.08), transparent 28%),
    radial-gradient(circle at 85% 0%, rgba(14, 165, 233, 0.08), transparent 24%),
    var(--bg);
  min-height: 100vh;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #111;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: min(calc(100% - 2.5rem), var(--max-width));
  margin-inline: auto;
}

.section {
  padding: 6rem 0;
}

.section-label {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-header h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.scrolled {
  background: color-mix(in srgb, var(--bg-elevated) 82%, transparent);
  border-color: var(--border);
  backdrop-filter: blur(10px);
}

.nav {
  width: min(calc(100% - 2.5rem), var(--max-width));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: 0.01em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-menu a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  color: var(--text);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: calc(var(--header-height) + 3rem) 1.25rem 4rem;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hero-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  margin: 1.25rem 0 0;
  font-size: clamp(1.2rem, 2.5vw, 1.65rem);
  color: var(--accent);
}

.hero-tagline {
  margin: 1.5rem 0 0;
  max-width: 38rem;
  color: var(--text-muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-primary:hover {
  background: color-mix(in srgb, var(--accent) 85%, #0b4a78);
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.03);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.5rem;
}

.hero-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.hero-links a:hover {
  color: var(--text);
  border-color: rgba(37, 99, 235, 0.35);
  background: var(--accent-soft);
}

.hero-accent {
  position: absolute;
  right: -8%;
  top: 18%;
  width: min(42vw, 420px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow), transparent 68%);
  filter: blur(8px);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 2rem;
  margin-top: 2.5rem;
}

.about-text p {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 1.08rem;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  box-shadow: 0 10px 30px rgba(2, 6, 23, 0.06);
}

.about-card h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
}

.facts-list {
  display: grid;
  gap: 1rem;
}

.facts-list div {
  display: grid;
  gap: 0.25rem;
}

.facts-list dt {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.facts-list dd {
  margin: 0;
  font-weight: 500;
}

.timeline {
  display: grid;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.timeline-item:hover {
  border-color: rgba(232, 168, 73, 0.25);
  transform: translateY(-2px);
}

.timeline-meta {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.timeline-meta strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-content h3 {
  margin: 0;
  font-size: 1.25rem;
}

.timeline-company {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
}

.timeline-content ul {
  margin-top: 1rem;
  display: grid;
  gap: 0.55rem;
}

.timeline-content li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.timeline-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
  border-color: rgba(232, 168, 73, 0.28);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.project-image {
  margin: -0.25rem -0.25rem 1rem;
  border-radius: calc(var(--radius) - 4px);
  overflow: hidden;
  border: 1px solid var(--border);
}

.project-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top center;
}

.project-card h3 {
  margin: 0;
  font-size: 1.2rem;
}

.project-card p {
  margin: 0.85rem 0 0;
  color: var(--text-muted);
  flex: 1;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.tag {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: color-mix(in srgb, var(--accent) 70%, #0f172a);
  font-size: 0.78rem;
  font-weight: 600;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.project-links a {
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 600;
}

.project-links a:hover {
  text-decoration: underline;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.skill-card {
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  box-shadow: 0 10px 30px rgba(2, 6, 23, 0.05);
}

.skill-card h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
}

.skill-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.skill-card li {
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.education-list {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}

.education-item {
  padding: 1.35rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  box-shadow: 0 10px 30px rgba(2, 6, 23, 0.05);
}

.education-item h3 {
  margin: 0;
  font-size: 1.15rem;
}

.education-meta {
  margin: 0.35rem 0 0;
  color: var(--accent);
  font-size: 0.92rem;
}

.education-note {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
}

.contact-card {
  padding: clamp(2rem, 5vw, 3rem);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(circle at top right, var(--accent-soft), transparent 45%),
    var(--bg-card);
  box-shadow: var(--shadow);
}

.contact-card h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 400;
}

.contact-copy {
  max-width: 34rem;
  margin: 1rem 0 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.back-to-top {
  color: var(--accent);
}

.back-to-top:hover {
  text-decoration: underline;
}

@media (max-width: 860px) {
  .about-grid,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-meta {
    padding-bottom: 0.25rem;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: calc(var(--header-height) - 0.5rem);
    right: 1.25rem;
    left: 1.25rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  }

  .nav-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-menu a {
    padding: 0.85rem 0.75rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media print {
  .site-header,
  .hero-actions,
  .hero-links,
  .back-to-top,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    padding: 1.5rem 0;
    break-inside: avoid;
  }

  .project-card,
  .timeline-item,
  .contact-card,
  .about-card,
  .skill-card,
  .education-item {
    border: 1px solid #ddd;
    box-shadow: none;
  }
}