:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --text-color: #333;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.container {
  max-width: 1400px;
  width: 100%;
  padding: 20px;
  text-align: center;
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100vh;
}

.cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 30px;
  font-size: 1rem;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
  font-weight: 600;
}

.btn-primary {
  background: white;
  color: #667eea;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: white;
  color: #667eea;
}

.tagline {
  font-size: 1.1rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.admin-link {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  color: white;
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.admin-link:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Header */
.main-header {
    background-color: var(--dark-color);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--box-shadow);
}

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

.main-nav a {
    color: white;
    text-decoration: none;
    margin-left: 2rem;
    transition: color 0.3s;
}

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

.logo {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  text-shadow: 2px 2px 20px rgba(0,0,0,0.2);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

/* Features Section */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  margin-bottom: 30px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.features h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 25px 15px;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-decoration: none;
  color: white;
  display: block;
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  background: rgba(255, 255, 255, 0.15);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 0.85rem;
  opacity: 0.9;
  line-height: 1.5;
}

.feature-card h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

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

.footer {
  margin-top: 30px;
  opacity: 0.7;
  font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 1200px) {
    .features {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    body {
        height: auto;
        min-height: 100vh;
        overflow: auto;
    }
    
    .container {
        height: auto;
        padding: 30px 15px;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .tagline {
        font-size: 1rem;
        margin-bottom: 20px;
    }
    
    .features {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 20px;
    }
    
    .feature-card {
        padding: 20px 15px;
    }
    
    .feature-icon {
        font-size: 2rem;
    }
    
    .feature-title {
        font-size: 1rem;
    }
    
    .feature-desc {
        font-size: 0.8rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
    
    .footer {
        margin-top: 20px;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .main-nav {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .main-nav a {
        margin-left: 0;
    }
}