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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #3498db;
}

.signin-btn {
    background-color: #3498db;
    padding: 0.5rem 1.5rem;
    border-radius: 5px;
    font-weight: 500;
}

.signin-btn:hover {
    background-color: #2980b9;
    color: white !important;
}

main {
    background-color: white;
    margin: 2rem auto;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

main h2 {
    margin-bottom: 2rem;
    color: #2c3e50;
    border-bottom: 3px solid #3498db;
    padding-bottom: 0.5rem;
}

.post {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #eee;
}

.post:last-child {
    border-bottom: none;
}

.post h3 {
    margin-bottom: 0.5rem;
}

.post h3 a {
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s;
}

.post h3 a:hover {
    color: #3498db;
}

.meta {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.post p {
    margin-bottom: 1rem;
}

.read-more {
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.read-more:hover {
    color: #2980b9;
}

.article-content {
    line-height: 1.8;
}

.article-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.article-content p {
    margin-bottom: 1rem;
}

.back-link {
    display: inline-block;
    margin-top: 2rem;
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
}

.back-link:hover {
    color: #2980b9;
}

footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
}