:root {
  --text: #2a2b2f;
  --muted: #5a5c63;
  --brand: #2d7ff9;
  --brand-dark: #1555c0;
  --bg: #f5f7fb;
  --card: #ffffff;
  --border: #d9deeb;
  --accent: #f0f5ff;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

a:hover {
  color: var(--brand-dark);
}

header {
  background: linear-gradient(135deg, rgba(45, 127, 249, 0.95), rgba(21, 85, 192, 0.92));
  color: #fff;
  padding: 4rem 1.5rem 5rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 2.5rem;
  color: #fff;
  transition: transform 0.2s ease, text-shadow 0.2s ease;
}

.logo img {
  height: 8rem;
  width: 8rem;
  border-radius: 50%;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.logo:hover {
  color: #fff;
  transform: translateY(-2px) scale(1.02);
  text-shadow: 0 10px 18px rgba(15, 30, 67, 0.35);
}

.logo:hover img {
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.85);
  transform: scale(1.03);
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.3rem);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.1rem;
  max-width: 620px;
  margin-bottom: 2rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-primary {
  background: #fff;
  color: var(--brand-dark);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.cta-primary:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 14px 28px rgba(15, 30, 67, 0.35);
}

.cta-secondary {
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  background: transparent;
}
.cta-secondary:hover {
  color: #fff;
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 14px 28px rgba(15, 30, 67, 0.35);
}

main {
  padding: 4rem 1.5rem;
}

.grid {
  display: grid;
  gap: 2rem;
  margin: 0 auto 4rem;
}

.grid.features {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 1.75rem;
  border: 1px solid var(--border);
  box-shadow: 0 18px 35px rgba(15, 30, 67, 0.05);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.3rem;
}

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

.feature-list {
  margin: 0;
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  color: var(--muted);
}

.feature-list li {
  line-height: 1.5;
}

.highlight {
  background: var(--accent);
  padding: 1.5rem;
  border-radius: 16px;
  border: 1px solid rgba(45, 127, 249, 0.15);
}

.code-block {
  background: #0f1e43;
  color: #f5f7fb;
  padding: 1.5rem;
  border-radius: 16px;
  font-family: "Fira Code", "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.95rem;
  overflow-x: auto;
}

footer {
  padding: 2.5rem 1.5rem;
  background: #0f1e43;
  color: #c3c8d8;
}

footer .footer-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
  align-items: center;
}

footer a {
  color: #fff;
}

@media (max-width: 720px) {
  .nav {
    flex-direction: column;
    gap: 1rem;
  }

  .hero {
    text-align: center;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .cta-group {
    justify-content: center;
  }

  footer .footer-content {
    flex-direction: column;
    text-align: center;
  }
}