/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fafafa;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    height: 70px;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.nav-brand p {
    font-size: 0.8rem;
    opacity: 0.9;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
    position: relative;
}

.nav-link:hover {
    opacity: 0.8;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Main Content */
.main {
    margin-top: 70px;
}

/* Title Section */
.title-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0 60px;
    text-align: center;
}

.main-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

/* Blog Content */
.blog-content {
    padding: 60px 0;
    background: white;
}

.blog-post {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.post-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.post-date, .post-category {
    font-size: 0.9rem;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 500;
}

.post-date {
    background: #e3f2fd;
    color: #1976d2;
}

.post-category {
    background: #f3e5f5;
    color: #7b1fa2;
}

.blog-post h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #333;
    line-height: 1.3;
}

.blog-post h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    color: #333;
}

.blog-post h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1.5rem 0 0.5rem;
    color: #333;
}

.blog-post p {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: #555;
}

.blog-post ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.blog-post li {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 0.5rem;
    color: #555;
}

/* Technical Grid */
.technical-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.tech-item {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

.tech-item h4 {
    color: #667eea;
    margin-bottom: 1rem;
}

.tech-item p {
    margin-bottom: 0;
    font-size: 1rem;
}

/* Demo Section */
.demo-section {
    margin: 4rem 0;
    padding: 2rem 0;
    background: #f8f9fa;
}

.demo-container {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.demo-frame {
    width: 100%;
    height: 600px;
    border: none;
    background: white;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3, .footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #34495e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
    color: white;
    text-decoration: none;
}

.social-links a:hover {
    background: #667eea;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 1rem;
    text-align: center;
    color: #bdc3c7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .blog-post h2 {
        font-size: 1.8rem;
    }
    
    .blog-post h3 {
        font-size: 1.3rem;
    }
    
    .blog-post p {
        font-size: 1rem;
    }
    
    .technical-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .title-section {
        padding: 60px 0 40px;
    }
    
    .main-title {
        font-size: 1.8rem;
    }
    
    .blog-post {
        padding: 0 15px;
    }
    
    .post-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
}