/* --- Global & Basic Styles --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 850px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- 1. Header & Navigation --- */
header {
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

.logo {
    margin: 0;
    font-size: 1.75rem;
    color: #007BFF;
}

nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
}

nav li {
    margin-left: 1.5rem;
}

nav a {
    text-decoration: none;
    color: #555;
    font-weight: 600;
    padding: 0.25rem 0;
    transition: color 0.3s ease;
}

nav a:hover,
nav a.active {
    color: #007BFF;
    border-bottom: 2px solid #007BFF;
}

/* --- 2. Main Content & Articles --- */
main {
    padding-top: 2rem; /* Space from header */
}

.blog-post {
    background-color: #ffffff;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.post-title {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 2rem;
    color: #222;
}

.post-meta {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 1rem;
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
    background-color: #007BFF;
    color: #ffffff;
    padding: 0.6rem 1.2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.read-more:hover {
    background-color: #0056b3;
}

/* --- 3. Footer --- */
footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    color: #999;
    border-top: 1px solid #e0e0e0;
}

/* --- 4. Responsiveness --- */
@media (max-width: 650px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

    nav li {
        margin-left: 0;
    }
    
    .post-title {
        font-size: 1.5rem;
    }
}