:root {
  --primary-color: #0f172a;
  --secondary-color: #3b82f6;
  --accent-color: #10b981;
  --text-color: #334155;
  --light-bg: #f8fafc;
  --white: #ffffff;
  --border-color: #e2e8f0;
  --container-width: 1200px;
  --header-height: 70px;
}

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

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

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

ul {
  list-style: none;
}

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

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background-color: var(--white);
  height: var(--header-height);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo img {
  height: 40px;
}

.nav-menu {
  display: flex;
  gap: 30px;
}

.nav-link {
  font-weight: 500;
  color: var(--text-color);
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--secondary-color);
}

.cta-button {
  background-color: var(--secondary-color);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 600;
  transition: background-color 0.2s;
}

.cta-button:hover {
  background-color: #2563eb;
}

.mobile-menu-toggle {
  display: none;
  font-size: 24px;
  cursor: pointer;
}

/* Hero Section */
.hero {
  background-color: var(--white);
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 20px;
  font-weight: 800;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 30px;
  color: #64748b;
}

/* Features/Categories Grid */
.section {
  padding: 60px 0;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 40px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.card {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.card h3 {
  color: var(--primary-color);
  margin-bottom: 10px;
}

/* Reviews Preview */
.review-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.review-image {
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 15px;
  background-color: #e2e8f0;
}

.rating {
  color: #f59e0b;
  margin-bottom: 10px;
}

.read-more {
  margin-top: auto;
  color: var(--secondary-color);
  font-weight: 600;
}

/* Newsletter */
.newsletter {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 60px 0;
  text-align: center;
}

.newsletter-form {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.newsletter-input {
  padding: 12px 20px;
  border-radius: 6px;
  border: none;
  min-width: 300px;
}

.newsletter-button {
  background-color: var(--accent-color);
  color: var(--white);
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
}

/* Footer */
footer {
  background-color: var(--white);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 20px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--primary-color);
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a:hover {
  color: var(--secondary-color);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: #94a3b8;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-color);
  }

  .nav-menu.active {
    display: flex;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero h1 {
    font-size: 2rem;
  }
}