:root {
    --color-primary: #0056b3;
    --color-secondary: #f8f9fa;
    --color-accent: #28a745;
    --color-text: #333;
    --color-light: #fff;
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--color-text);
    background-color: #f5f7fa;
    padding: 0;
    margin: 0;
}

header {
    background-color: var(--color-light);
    box-shadow: var(--shadow);
    padding: 1rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.5rem;
}

.logo {
    max-height: 60px;
    margin-right: 10px;
}

.title {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin: 0.5rem 0;
}

main {
    max-width: 1200px;
    margin: 1rem auto;
    padding: 0 1rem;
}

.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.project-card {
    background-color: var(--color-light);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
}

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

.project-title {
    color: var(--color-light);
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    padding: 1.5rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
}

footer {
    background-color: var(--color-primary);
    color: var(--color-light);
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
    font-size: 1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .projects-container {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .projects-container {
        grid-template-columns: 1fr;
    }
    
    .project-card {
        height: 180px;
    }
    
    .title {
        font-size: 1.3rem;
    }
}