.projects-section {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
max-width: 1200px;
margin: 0 auto;
padding: 2rem;
background-color: #f5f7fa;
}

.projects-title {
font-size: 2.5rem;
color: #2c3e50;
text-align: center;
margin-bottom: 3rem;
font-weight: 700;
}

.projects-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
gap: 2rem;
margin-bottom: 2rem;
}

.project-card {
background: white;
border-radius: 12px;
padding: 1.5rem;
box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
transition: transform 0.3s ease, box-shadow 0.3s ease;
border: 1px solid #e1e8ed;
}

.project-card:hover {
transform: translateY(-4px);
box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1);
}

.project-number {
display: inline-block;
background: #3498db;
color: white;
width: 30px;
height: 30px;
border-radius: 50%;
text-align: center;
line-height: 30px;
font-weight: bold;
margin-bottom: 1rem;
}

.project-title {
font-size: 1.5rem;
color: #2c3e50;
margin-bottom: 0.5rem;
font-weight: 600;
}

.project-link {
display: inline-block;
color: #3498db;
text-decoration: none;
margin-bottom: 1rem;
font-size: 0.9rem;
transition: color 0.2s ease;
}

.project-link:hover {
color: #2980b9;
text-decoration: underline;
}

.project-description {
color: #555;
line-height: 1.6;
margin-bottom: 1.5rem;
font-size: 0.95rem;
}

.technical-challenges {
margin-top: 1rem;
}

.challenges-title {
font-size: 1.1rem;
color: #34495e;
font-weight: 600;
margin-bottom: 0.5rem;
}

.challenges-list {
list-style: none;
padding: 0;
}

.challenge-item {
position: relative;
padding-left: 1.5rem;
margin-bottom: 0.8rem;
color: #666;
font-size: 0.9rem;
line-height: 1.5;
}

.challenge-item::before {
content: "▸";
position: absolute;
left: 0;
color: #3498db;
font-weight: bold;
}

.challenge-label {
font-weight: 600;
color: #2c3e50;
}

@media (max-width: 768px) {
.projects-grid {
    grid-template-columns: 1fr;
}

.projects-title {
    font-size: 2rem;
}
}