:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: var(--primary-color);
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: var(--shadow);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
}

.search-section {
    padding: 2rem 0;
    background-color: white;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.search-container {
    display: flex;
    justify-content: center;
    gap: 10px;
}

#searchInput {
    padding: 12px 15px;
    width: 60%;
    max-width: 500px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

#categoryFilter {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    background-color: white;
}

.projects-section {
    padding: 1rem 0 3rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.project-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.project-header {
    padding: 1.5rem;
    flex-grow: 1;
}

.project-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.project-description {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: #777;
}

.project-footer {
    padding: 1rem 1.5rem;
    background-color: #f8f9fa;
    border-top: 1px solid #eee;
}

.project-link {
    display: inline-block;
    padding: 8px 15px;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

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

.no-results {
    text-align: center;
    padding: 2rem;
    grid-column: 1 / -1;
    color: #777;
}

.loading {
    text-align: center;
    padding: 2rem;
    grid-column: 1 / -1;
    color: #777;
}

footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

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

    .search-container {
        flex-direction: column;
        align-items: center;
    }

    #searchInput {
        width: 90%;
    }
}