:root {
  color-scheme: light;
  --color-background: #f7f9fc;
  --color-surface: #ffffff;
  --color-surface-alt: #eef2f8;
  --color-text: #101828;
  --color-text-muted: #5f6c80;
  --color-border: #e2e8f0;
  --color-accent: #2563eb;
  --shadow-soft: 0 20px 45px -25px rgba(37, 99, 235, 0.45);
  font-size: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background-color: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}

.site-header .layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
}

.main-nav {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.main-nav a {
  position: relative;
  padding-bottom: 4px;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  opacity: 0;
  transform: scaleX(0.6);
  transition: transform 180ms ease, opacity 180ms ease;
}

.main-nav a:hover::after,
.main-nav a:focus::after {
  opacity: 1;
  transform: scaleX(1);
}

.cta-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-accent);
}

.hero {
  padding: 100px 0 80px;
}

.hero__content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: 32px;
  align-items: start;
}

.hero__text {
  background: linear-gradient(150deg, #ffffff 0%, rgba(255, 255, 255, 0.8) 100%);
  border-radius: 24px;
  padding: 48px;
  box-shadow: var(--shadow-soft);
}

.eyebrow {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

h1 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.15;
}

.lead {
  margin: 0 0 32px;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover,
.button:focus {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px -12px rgba(37, 99, 235, 0.6);
}

.link {
  color: var(--color-accent);
  font-weight: 600;
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.meta-card {
  padding: 18px 20px;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.9);
}

.meta-card__label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.meta-card__value {
  font-weight: 600;
}

.hero__sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--color-surface);
  border-radius: 24px;
  padding: 32px;
  border: 1px solid rgba(226, 232, 240, 0.7);
}

.sidebar-card h2 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.sidebar-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--color-text-muted);
  display: grid;
  gap: 12px;
}

.section {
  padding: 96px 0;
}

.section--alt {
  background: var(--color-surface);
}

.section__header {
  max-width: 640px;
  margin-bottom: 48px;
}

.section__header h2 {
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  margin: 0 0 16px;
}

.section__header p {
  margin: 0;
  color: var(--color-text-muted);
}

.pill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.pill {
  background: var(--color-surface);
  border-radius: 24px;
  padding: 32px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  transition: transform 160ms ease;
}

.pill:hover,
.card:hover {
  transform: translateY(-4px);
}

.pill h3,
.card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.pill p,
.card p {
  margin: 0;
  color: var(--color-text-muted);
}

.timeline {
  display: grid;
  gap: 32px;
}

.timeline__item {
  background: var(--color-surface);
  border-radius: 24px;
  padding: 32px 32px 32px 36px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  position: relative;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 32px;
  width: 6px;
  height: calc(100% - 64px);
  background: linear-gradient(180deg, #c1d5ff 0%, var(--color-accent) 100%);
  border-radius: 3px;
}

.timeline__item header {
  margin-bottom: 8px;
}

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

.timeline__period {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.timeline__summary {
  margin: 16px 0;
  color: var(--color-text-muted);
}

.timeline__item ul {
  margin: 0;
  padding-left: 20px;
  color: var(--color-text-muted);
  display: grid;
  gap: 10px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-surface);
  border-radius: 24px;
  padding: 32px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card__tag {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.card__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.skills-column {
  background: var(--color-surface);
  border-radius: 24px;
  padding: 28px;
  border: 1px solid rgba(226, 232, 240, 0.9);
}

.skills-column h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.skills-column ul {
  margin: 0;
  padding-left: 20px;
  color: var(--color-text-muted);
  display: grid;
  gap: 8px;
}

.contact {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(37, 99, 235, 0.15) 100%);
}

.contact__content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.contact__content h2 {
  margin: 0 0 8px;
  font-size: clamp(1.9rem, 3vw, 2.4rem);
}

.contact__content p {
  margin: 0;
  color: var(--color-text-muted);
}

.contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.site-footer {
  padding: 32px 0;
  background: var(--color-surface);
  border-top: 1px solid rgba(226, 232, 240, 0.7);
}

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

.back-to-top {
  font-weight: 600;
  color: var(--color-accent);
}

@media (max-width: 960px) {
  .site-header .layout {
    flex-wrap: wrap;
    gap: 12px;
  }

  .main-nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
  }

  .hero__content {
    grid-template-columns: 1fr;
  }

  .hero__text {
    padding: 36px;
  }

  .hero__meta {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .hero__sidebar {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-card {
    flex: 1 1 260px;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
  }

  .main-nav {
    gap: 12px;
    flex-wrap: wrap;
    font-size: 0.85rem;
  }

  .hero__text {
    padding: 28px;
  }

  .hero__meta {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 0;
  }
}