:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5f6b7a;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #dbe3ef;
  --shadow: 0 18px 45px rgba(23, 32, 51, 0.10);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px;
}

.logo {
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  font-weight: 600;
}

.nav-links a[aria-current="page"] {
  color: var(--primary);
}

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 56px 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr);
  gap: 32px;
  align-items: center;
  min-height: 520px;
}

.hero-content,
.page-hero,
.highlight {
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.16), transparent 34%),
    var(--surface);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-content {
  padding: 56px;
}

.page-hero {
  padding: 48px;
  margin-bottom: 32px;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  max-width: 800px;
  font-size: clamp(2.3rem, 6vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.06em;
}

.page-hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.7rem);
}

.hero-text,
.page-hero p {
  max-width: 760px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.button-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
}

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

.button.secondary {
  background: #eef4ff;
  color: var(--primary);
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.hero-card,
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(23, 32, 51, 0.07);
}

.hero-card {
  padding: 30px;
}

.hero-card h2,
.card h2,
.card h3 {
  margin-top: 0;
  line-height: 1.2;
}

.hero-card ul {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.section {
  margin-top: 36px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 22px;
}

.section-heading h2,
.highlight h2,
.two-column h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.grid {
  display: grid;
  gap: 22px;
}

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

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: start;
}

.card {
  padding: 26px;
}

.card p,
.highlight p,
.two-column p {
  color: var(--muted);
}

.project-card,
.link-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.project-card a,
.link-card a {
  margin-top: auto;
}

.tag {
  display: inline-block;
  margin-bottom: 16px;
  padding: 5px 10px;
  border-radius: 999px;
  background: #eef4ff;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
}

.highlight {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: 24px;
  align-items: center;
  padding: 34px;
}

.site-footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 820px) {
  .nav,
  .hero,
  .three-columns,
  .two-column,
  .highlight {
    grid-template-columns: 1fr;
  }

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

  .hero {
    min-height: auto;
  }

  .hero-content,
  .page-hero {
    padding: 34px;
  }
}