body {
font-family: ‘Segoe UI’, Tahoma, Geneva, Verdana, sans-serif;
margin: 0;
padding: 20px;
background-color: #f5f5f5;
color: #333;
}

.container {
max-width: 100%px;
margin: 0 auto;
background-color: white;
padding: 30px;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
color: #2c3e50;
text-align: center;
margin-bottom: 30px;
font-size: 2.2em;
}

.intro {
margin-bottom: 30px;
line-height: 1.6;
font-size: 1.1em;
}

.resources-grid {
display: grid;
grid-template-columns: repeat(2, 1fr);
gap: 25px;
margin-top: 30px;
}

.resource-card {
background-color: #f8f9fa;
border-radius: 8px;
padding: 25px;
text-align: center;
transition: all 0.3s ease;
box-shadow: 0 2px 5px rgba(0,0,0,0.05);
display: flex;
flex-direction: column;
justify-content: center;
min-height: 180px;
text-decoration: none;
color: #333;
border: 2px solid #e9ecef;
}

.resource-card:hover {
transform: translateY(-5px);
box-shadow: 0 5px 15px rgba(0,0,0,0.1);
background-color: #fff;
border-color: #3498db;
}

.resource-card h3 {
margin-top: 0;
color: #3498db;
font-size: 1.4em;
}

.resource-card p {
margin-bottom: 0;
font-size: 1em;
color: #666;
line-height: 1.5;
}

.examples {
margin-top: 15px;
font-style: italic;
color: #2c3e50;
}

.icon {
font-size: 2.2em;
margin-bottom: 15px;
color: #3498db;
}

footer {
margin-top: 40px;
text-align: center;
font-size: 0.9em;
color: #666;
padding-top: 20px;
border-top: 1px solid #eee;
}

.navigation {
display: flex;
justify-content: space-between;
margin-bottom: 20px;
}

.button {
display: inline-block;
padding: 10px 15px;
background-color: #3498db;
color: white;
border-radius: 5px;
text-decoration: none;
font-weight: bold;
transition: background-color 0.3s;
}

.button:hover {
background-color: #2980b9;
}

.level-tabs {
display: flex;
justify-content: center;
margin: 20px 0;
gap: 10px;
}

.level-tab {
padding: 8px 16px;
background-color: #e9ecef;
border-radius: 20px;
text-decoration: none;
color: #495057;
font-weight: 500;
transition: all 0.3s;
}

.level-tab:hover, .level-tab.active {
background-color: #3498db;
color: white;
}

.info-box {
background-color: #f8f9fa;
border-left: 4px solid #3498db;
padding: 15px;
margin: 20px 0;
border-radius: 4px;
}

.info-box h4 {
margin-top: 0;
color: #3498db;
}