:root {
  --primary: #1b9aaa;
  --primary-dark: #147784;
  --accent: #4ecdc4;
  --bg: #f5fbfd;
  --text: #12313f;
  --muted: #6b7b86;
  --white: #ffffff;
  --radius: 12px;
  --max-width: 1100px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  background: var(--white);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, #ffffff, #1b9aaa);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--primary-dark);
}

.nav-cta {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  text-decoration: none;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  background: var(--white);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.hero h1 {
  font-size: 2.4rem;
  margin-bottom: 1rem;
}

.hero p {
  color: var(--muted);
  margin-bottom: 1.5rem;
  max-width: 30rem;
}

.btn-primary {
  padding: 0.9rem 1.6rem;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.hero-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

/* Categories */
.section-title {
  font-size: 1.8rem;
  margin: 3rem 0 1rem;
}

.categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.cat-card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.04);
  cursor: pointer;
  transition: 0.2s;
}

.cat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}

.cat-card img {
  width: 80px;
  margin-bottom: 1rem;
}

.cat-card h3 {
  margin-bottom: 0.5rem;
}

/* CTA */
.cta {
  margin-top: 4rem;
  background: linear-gradient(135deg, #1b9aaa, #147784);
  padding: 2rem;
  border-radius: var(--radius);
  color: var(--white);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.cta h3 {
  font-size: 1.5rem;
}

.cta button {
  background: var(--white);
  color: var(--primary-dark);
  border: none;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
}

footer {
  margin-top: 3rem;
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 800px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .categories {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 500px) {
  .categories {
    grid-template-columns: 1fr;
  }
}