/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a1a1a;
  background-color: #ffffff;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* Utility */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 64px 0;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.btn-primary {
  background-color: #2563eb;
  color: #ffffff;
}

.btn-primary:hover {
  opacity: 0.85;
}

/* Navbar */
.nav-toggle { display: none; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #1a1a1a;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}

.nav-menu {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-menu a {
  font-size: 15px;
  color: #1a1a1a;
  font-weight: 500;
}

.nav-menu a:hover { color: #2563eb; }

/* Hero */
.hero { background-color: #f8fafc; }

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #1a1a1a;
}

.hero-desc {
  font-size: 18px;
  color: #4b5563;
  margin-bottom: 32px;
}

/* Features */
.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: #1a1a1a;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.card {
  background-color: #f8fafc;
  border-radius: 10px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-icon { font-size: 32px; }

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: #1a1a1a;
}

.card-desc {
  font-size: 15px;
  color: #4b5563;
  line-height: 1.6;
}

/* CTA */
.cta {
  background-color: #f0f4ff;
  text-align: center;
}

.cta-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-desc {
  font-size: 16px;
  color: #4b5563;
  margin-bottom: 24px;
}

/* Footer */
.footer {
  background-color: #1a1a1a;
  padding: 24px 0;
}

.footer-text {
  color: #9ca3af;
  text-align: center;
  font-size: 14px;
}

/* Media Queries */
@media (min-width: 768px) {
  .hero-inner {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }

  .hero-text { flex: 1; }
  .hero-image { flex: 1; }

  .hero-title { font-size: 36px; }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
}

@media (min-width: 1024px) {
  .hero-title { font-size: 42px; }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .nav-hamburger { display: flex; }

  .nav-menu {
    display: none;
    flex-direction: column;
    gap: 16px;
    padding: 24px 0;
  }

  .nav-toggle:checked ~ nav .nav-menu {
    display: flex;
  }
}