/* Structure */
:root {
    --primary-color: #2c3e50;    /* Professional dark blue */
    --secondary-color: #34495e;  /* Lighter blue */
    --accent-color: #3498db;     /* Bright blue for highlights */
    --background-color: #f8f9fa; /* Light gray background */
    --text-color: #2c3e50;      /* Dark text */
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

#main-content {
    background-color: var(--white);
    padding: 2rem;
    min-height: 100vh;
    width: 100%;
    box-sizing: border-box;
}

#main-header, #main-footer {
    background-color: var(--primary-color);
    padding: 1rem;
    color: var(--white);
    width: 100%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.project {
    padding: 1.5rem;
    margin: 1rem;
    background: var(--white);
    border-radius: 8px;
    flex: 0 0 calc(33.33% - 2rem);
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.project:hover {
    transform: translateY(-5px);
}

.project img {
    padding: 0.5rem;
    display: block;
    margin: auto;
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

/* Typography */
h1, h2, h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

#main-header h1, #main-header h2 {
    text-align: center;
    color: var(--white);
    margin: 0;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
}

/* Navigation */
#main-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#main-nav li {
    padding: 0.5rem 1rem;
}

#main-nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

#main-nav a:hover {
    color: var(--accent-color);
}

/* Projects Grid */
.projects {
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 900px) {
    #main-nav ul {
        display: flex;
        justify-content: center;
    }
    
    .projects {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 2rem;
    }
    
    .project {
        flex: 0 0 calc(33.33% - 2rem);
        margin: 0;
    }
}