body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #2c3e50;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    letter-spacing: 2px;
}

nav {
    background-color: #34495e;
    padding: 0.5rem 0;
    text-align: center;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
    text-transform: uppercase;
}

nav a:hover {
    color: #e74c3c;
}

.container {
    max-width: 960px;
    margin: 20px auto;
    background: #fff;
    padding: 40px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1.article-title {
    color: #c0392b;
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-align: center;
}

h2 {
    color: #2c3e50;
    border-bottom: 2px solid #ecf0f1;
    padding-bottom: 10px;
    margin-top: 30px;
}

p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.highlight {
    background-color: #fff3cd;
    padding: 5px;
    font-weight: bold;
}

.btn-cta {
    display: block;
    width: 80%;
    margin: 40px auto;
    padding: 20px;
    background-color: #e74c3c;
    color: #fff;
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 5px;
    border-bottom: 5px solid #c0392b;
    transition: all 0.3s ease;
}

.btn-cta:hover {
    background-color: #c0392b;
    transform: translateY(2px);
}

.sidebar {
    background: #ecf0f1;
    padding: 20px;
    margin-top: 40px;
    border-left: 5px solid #3498db;
}

.comments-section {
    margin-top: 50px;
    border-top: 1px solid #ddd;
    padding-top: 20px;
}

.comment {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.comment-author {
    font-weight: bold;
    color: #2980b9;
}

.comment-date {
    font-size: 0.8rem;
    color: #999;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #2c3e50;
    color: #bdc3c7;
    margin-top: 40px;
}

.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.post-card {
    border: 1px solid #ddd;
    padding: 20px;
    background: #fff;
    transition: box-shadow 0.3s;
}

.post-card:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

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

.alert-box {
    background-color: #d1ecf1;
    color: #0c5460;
    padding: 15px;
    border-radius: 4px;
    border: 1px solid #bee5eb;
    margin-bottom: 20px;
}