/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* Header styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2d3748;
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.nav-link {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.nav-link:hover,
.nav-link.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* Breadcrumb navigation */
.breadcrumb {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 2rem;
    margin-top: 1.5rem;
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #718096;
}

.breadcrumb a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: #764ba2;
}

.breadcrumb .separator {
    color: #cbd5e0;
    margin: 0 0.5rem;
}

.breadcrumb .current {
    color: #4a5568;
    font-weight: 600;
}

/* Main content */
.main {
    padding: 3rem 0;
    min-height: calc(100vh - 200px);
}

/* Hero section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: #4a5568;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: #718096;
    margin-bottom: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Navigation grid */
.navigation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.nav-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.nav-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.nav-card:hover::before {
    transform: scaleX(1);
}

.nav-card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.nav-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

.nav-card p {
    color: #718096;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Content pages */
.content {
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    margin-bottom: 2rem;
}

.content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #2d3748;
    border-bottom: 3px solid;
    border-image: linear-gradient(135deg, #667eea 0%, #764ba2 100%) 1;
    padding-bottom: 1rem;
}

.content h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin: 2rem 0 1rem 0;
    color: #2d3748;
}

.content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem 0;
    color: #2d3748;
}

.content p {
    margin-bottom: 1rem;
    color: #4a5568;
    line-height: 1.7;
}

.content ul, .content ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.content li {
    margin-bottom: 0.5rem;
    color: #4a5568;
}

.content blockquote {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    margin: 2rem 0;
    font-style: italic;
    position: relative;
}

.content blockquote::before {
    content: '"';
    font-size: 4rem;
    position: absolute;
    top: -10px;
    left: 10px;
    opacity: 0.3;
}

.content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.content th,
.content td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.content th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
}

.content tr:hover {
    background: #f7fafc;
}

/* Warning boxes */
.warning {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    margin: 2rem 0;
    border-left: 4px solid #c44569;
}

.warning h3 {
    color: white;
    margin-bottom: 0.5rem;
}

/* Info boxes */
.info-box {
    background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    margin: 2rem 0;
}

/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 4rem;
}

.footer p {
    color: #718096;
}

.footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.footer a:hover {
    text-decoration: underline;
}

/* Responsive design */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        justify-content: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .navigation-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .nav-card {
        padding: 1.5rem;
    }
    
    .content {
        padding: 2rem 1rem;
    }
    
    .content h1 {
        font-size: 2rem;
    }
    
    .breadcrumb .container {
        flex-wrap: wrap;
        gap: 0.25rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 2rem 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .nav {
        gap: 0.5rem;
    }
    
    .nav-link {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .breadcrumb {
        padding: 0.5rem 0;
    }
    
    .breadcrumb .container {
        font-size: 0.8rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-card {
    animation: fadeInUp 0.6s ease-out;
}

.nav-card:nth-child(1) { animation-delay: 0.1s; }
.nav-card:nth-child(2) { animation-delay: 0.2s; }
.nav-card:nth-child(3) { animation-delay: 0.3s; }
.nav-card:nth-child(4) { animation-delay: 0.4s; }
.nav-card:nth-child(5) { animation-delay: 0.5s; }
.nav-card:nth-child(6) { animation-delay: 0.6s; }
.nav-card:nth-child(7) { animation-delay: 0.7s; }
.nav-card:nth-child(8) { animation-delay: 0.8s; }