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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
#header {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #eee;
}

.logo h1 {
    font-size: 2.5em;
    color: #2c3e50;
}

.tagline {
    color: #7f8c8d;
    font-style: italic;
}

/* Navigation */
#navbar {
    background: #34495e;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 5px;
}

#navbar a {
    color: white;
    text-decoration: none;
    padding: 5px 15px;
    margin-right: 5px;
    border-radius: 3px;
}

#navbar a:hover {
    background: #2c3e50;
}

/* Breadcrumb */
#breadcrumb {
    background: #ecf0f1;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 5px;
    font-family: monospace;
    font-size: 0.9em;
}

/* Main Layout */
.wrapper {
    display: flex;
    gap: 20px;
    min-height: 600px;
}

/* Sidebars */
.sidebar {
    flex: 0 0 200px;
    background: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
}

.sidebar h3 {
    margin-bottom: 10px;
    color: #2c3e50;
    border-bottom: 1px solid #ddd;
    padding-bottom: 5px;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    padding: 5px 0;
    cursor: pointer;
}

.sidebar li:hover {
    color: #3498db;
}

.placeholder {
    color: #999;
    font-style: italic;
}

/* Main Content */
#content {
    flex: 1;
    padding: 0 20px;
}

#content section {
    margin-bottom: 40px;
}

#content h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #ecf0f1;
}

#content h3 {
    color: #34495e;
    margin: 20px 0 10px;
}

/* News Section */
.news-item {
    margin-bottom: 30px;
    padding-left: 20px;
    border-left: 3px solid #3498db;
}

.feed-link {
    display: inline-block;
    margin-bottom: 15px;
    color: #e67e22;
    text-decoration: none;
}

.feed-link:hover {
    text-decoration: underline;
}

/* Features List */
.features-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.features-list li {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #3498db;
}

/* Table */
.pairs-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.pairs-table th {
    background: #34495e;
    color: white;
    padding: 10px;
    text-align: left;
}

.pairs-table td {
    padding: 8px 10px;
    border-bottom: 1px solid #ecf0f1;
}

.pairs-table tr:hover {
    background: #f8f9fa;
}

/* Footer */
#footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 2px solid #eee;
    text-align: center;
    color: #7f8c8d;
}

#footer a {
    color: #3498db;
    text-decoration: none;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .wrapper {
        flex-direction: column;
    }
    
    .sidebar {
        flex: auto;
    }
    
    .features-list {
        grid-template-columns: 1fr;
    }
}