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

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: #1f2933;
  background-color: #f8fafc;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  background-color: #0f172a;
  color: #f9fafb;
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo a {
  font-weight: 700;
  font-size: 1.25rem;
}

.main-nav a {
  margin-left: 1rem;
  font-size: 0.95rem;
  opacity: 0.9;
}

.main-nav a:hover {
  opacity: 1;
}

.site-main {
  padding: 2.5rem 0 3rem;
}

.hero {
  text-align: center;
  padding: 3rem 1rem 2.5rem;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  border-radius: 1.5rem;
  color: #f9fafb;
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-size: 2.3rem;
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  opacity: 0.95;
}

.hero-text {
  max-width: 520px;
  margin: 0.5rem auto 1.75rem;
  opacity: 0.9;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.section {
  margin-bottom: 2.5rem;
}

.section h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.section-intro {
  max-width: 620px;
  margin-bottom: 1.25rem;
}

.section-alt {
  background-color: #e5edf7;
  border-radius: 1.25rem;
  padding: 1.75rem 1.5rem;
}

.grid {
  display: grid;
  gap: 1.25rem;
}

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

.grid.four {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.grid.three,
.products-grid {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  background-color: #ffffff;
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.04);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.product-card {
  background-color: #ffffff;
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.04);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.product-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.product-price {
  font-weight: 700;
  color: #0f172a;
  margin: 0;
}

.product-desc {
  font-size: 0.9rem;
  color: #4b5563;
  margin: 0 0 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn.primary {
  background-color: #38bdf8;
  color: #0f172a;
}

.btn.primary:hover {
  background-color: #0ea5e9;
}

.btn.secondary {
  background-color: #f9fafb;
  color: #0f172a;
  border-color: #cbd5f5;
}

.btn.secondary:hover {
  background-color: #e5edf7;
}

.checklist {
  list-style: none;
  padding-left: 0;
}

.checklist li::before {
  content: "•";
  color: #38bdf8;
  font-weight: 900;
  display: inline-block;
  width: 1rem;
  margin-left: -1rem;
}

.checklist li {
  margin-bottom: 0.35rem;
}

.site-footer {
  background-color: #0f172a;
  color: #9ca3af;
  padding: 1.25rem 0 1.5rem;
}

.footer-inner {
  text-align: center;
  font-size: 0.85rem;
}

.footer-links a {
  color: #e5e7eb;
  margin: 0 0.4rem;
}

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

@media (max-width: 640px) {
  .hero {
    padding: 2.25rem 1rem 2rem;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .main-nav {
    font-size: 0.9rem;
  }

  .main-nav a {
    margin-left: 0.75rem;
  }
}