:root {
  --bg: #f7f7f5;
  --surface: rgba(255, 255, 255, 0.8);
  --surface-strong: #ffffff;
  --text: #09090b;
  --text-soft: #4b5563;
  --muted: #e5e7eb;
  --line: rgba(9, 9, 11, 0.08);
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: min(1120px, calc(100vw - 32px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Noto Sans SC", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 32%),
    radial-gradient(circle at top right, rgba(15, 23, 42, 0.08), transparent 22%),
    var(--bg);
  line-height: 1.65;
}

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

button,
a {
  cursor: pointer;
}

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

.container {
  width: var(--container);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  padding: 12px 16px;
  background: var(--text);
  color: #fff;
  border-radius: 12px;
  z-index: 1000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(247, 247, 245, 0.72);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  border-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--text), #2f3642);
  color: #fff;
  box-shadow: var(--shadow);
}

.brand-text {
  font-size: 1rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 0.95rem;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="true"] {
  background: rgba(37, 99, 235, 0.08);
  color: var(--text);
  outline: none;
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 16px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  box-shadow: inset 0 0 0 1px rgba(9, 9, 11, 0.08);
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
}

.section {
  padding: 88px 0;
}

.hero {
  padding-top: 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.9fr);
  gap: 28px;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.section-shell,
.contact-shell,
.timeline-item,
.metric-card,
.skill-panel,
.education-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-copy,
.hero-panel {
  padding: 36px;
  border-radius: var(--radius-xl);
}

.eyebrow,
.section-kicker,
.panel-label {
  margin: 0 0 14px;
  color: var(--accent-strong);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  font-weight: 700;
}

.hero h1,
.section-heading h2,
.contact-shell h2 {
  margin: 0;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.hero h1 {
  font-size: clamp(1.9rem, 3.2vw, 3.2rem);
  max-width: 14ch;
  line-height: 1.18;
}

.hero-summary {
  margin: 24px 0 0;
  max-width: 60ch;
  color: var(--text-soft);
  font-size: 1.04rem;
}

.hero-tags,
.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.hero-tags span,
.pill-list li {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(9, 9, 11, 0.08);
  color: var(--text-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  min-height: 48px;
  padding: 12px 18px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.button-primary {
  background: var(--text);
  color: #fff;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #1f2937;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(9, 9, 11, 0.08);
}

.panel-card {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.panel-card h2 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

.panel-card p {
  margin: 12px 0 0;
  color: var(--text-soft);
}

.hero-stats {
  display: grid;
  gap: 20px;
  margin: 28px 0 0;
}

.hero-stats div {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.hero-stats div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.hero-stats dt {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.hero-stats dd {
  margin: 6px 0 0;
  color: var(--text-soft);
}

.section-heading {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}

.section-heading h2,
.contact-shell h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.section-heading.compact h2 {
  max-width: 14ch;
}

.section-shell,
.contact-shell,
.education-card {
  padding: 32px;
  border-radius: var(--radius-lg);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.about-grid p,
.timeline-subtitle,
.timeline-content li,
.metric-card p,
.education-card p,
.contact-card,
.contact-label {
  color: var(--text-soft);
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  padding: 28px;
  border-radius: var(--radius-lg);
}

.timeline-meta p,
.timeline-meta span,
.education-card span {
  display: block;
}

.timeline-meta p {
  margin: 0 0 8px;
  font-weight: 700;
}

.timeline-meta span,
.education-card span {
  color: var(--text-soft);
}

.timeline-content h3,
.metric-card h3,
.skill-panel h3,
.education-card h3 {
  margin: 0;
  font-size: 1.34rem;
  letter-spacing: -0.03em;
}

.timeline-subtitle {
  margin: 10px 0 0;
}

.timeline-content ul {
  margin: 18px 0 0;
  padding-left: 20px;
}

.timeline-content li + li {
  margin-top: 10px;
}

.highlight-grid,
.skills-grid,
.contact-cards {
  display: grid;
  gap: 18px;
}

.highlight-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.metric-value {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--text);
}

.metric-card h3 {
  margin-bottom: 10px;
}

.skills-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skill-panel {
  padding: 24px;
  border-radius: var(--radius-md);
}

.education-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.education-card p,
.education-card span {
  margin: 0;
}

.section-contact {
  padding-bottom: 104px;
}

.contact-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 24px;
}

.contact-cards {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.contact-card {
  min-height: 96px;
  padding: 20px 22px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(9, 9, 11, 0.08);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.contact-card:hover,
.contact-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.24);
  outline: none;
}

.contact-card strong {
  color: var(--text);
  font-size: 1.04rem;
}

.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid rgba(9, 9, 11, 0.06);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-soft);
}

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

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

@media (max-width: 1024px) {
  .hero-grid,
  .contact-shell,
  .timeline-item,
  .highlight-grid,
  .skills-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: none;
  }

  .timeline-item {
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .hero {
    padding-top: 28px;
  }

  .header-inner {
    min-height: 72px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 16px;
    right: 16px;
    padding: 12px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow);
    border: 1px solid rgba(9, 9, 11, 0.08);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .hero-copy,
  .hero-panel,
  .section-shell,
  .contact-shell,
  .timeline-item,
  .metric-card,
  .skill-panel,
  .education-card {
    padding: 24px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}