/* Cool Hub - Modern Responsive Design */
:root {
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --text-light: #e2e8f0;
  --bg-primary: #ffffff;
  --bg-secondary: #f7fafc;
  --bg-dark: #1a202c;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.15);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, #e6fffa 100%);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo a {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: var(--transition);
}

.logo a:hover {
  background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav {
  display: flex;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

nav a:hover {
  color: var(--primary-color);
  background: rgba(102, 126, 234, 0.1);
}

nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transition: var(--transition);
}

nav a:hover::after {
  width: 100%;
  left: 0;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--primary-color);
  border-radius: 3px;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* Categories Section */
.categories {
  padding: 4rem 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 3rem;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.category-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.category-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.category-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.category-button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: var(--transition);
  margin-bottom: 1rem;
}

.category-button:hover {
  transform: scale(1.05);
}

/* Featured Items */
.featured {
  padding: 4rem 0;
  background: var(--bg-primary);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.featured-item {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: var(--transition);
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.featured-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--primary-color);
}

.featured-item h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.featured-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.featured-item a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.featured-item a:hover {
  color: var(--secondary-color);
}

.read-more {
  text-align: center;
  margin-top: 2rem;
}

.read-more a {
  display: inline-block;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
}

.read-more a:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Footer */
footer {
  background: var(--bg-dark);
  color: var(--text-light);
  text-align: center;
  padding: 2rem 0;
  margin-top: 4rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow);
  }
  
  nav.active {
    display: flex;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .featured-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 15px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 2rem 0;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .categories {
    padding: 2rem 0;
  }
  
  .featured {
    padding: 2rem 0;
  }
  
  .category-card {
    padding: 1.5rem;
  }
}