:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --text-color: #ecf0f1;
    --light-bg: #f8f9fa;
    --dark-bg: #222;
    --white: #FFFFFF;
    --spacing-unit: 1.5rem;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--dark-bg);
    text-align: center;
}

.contenedor {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.header {
    background-color: var(--primary-color);
    padding: calc(var(--spacing-unit) * 2) 0;
    margin-bottom: var(--spacing-unit);
}

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

.header p {
    font-size: 1.2rem;
    color: var(--text-color);
    opacity: 0.9;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-unit);
    padding: var(--spacing-unit) 0;
}

.project-card {
    background-color: var(--secondary-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
}

.project-card-content {
    padding: var(--spacing-unit);
}

.project-card h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--white);
    overflow-wrap: break-word; /* Evita que el texto largo se desborde */
}

.project-card p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.project-card a {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.project-card a:hover {
    background-color: #3498db;
}

footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-unit) 0;
    margin-top: var(--spacing-unit);
}