body {
    font-family: 'Public Sans', sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    padding: 20px;
}

.main-container {
    max-width: 1000px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 { color: #333; margin-top: 20px; }
.header h2 { color: #666; font-weight: 400; font-size: 1.1rem; }

.grid-modulos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.tarjeta {
    background: white;
    width: 260px;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
    transition: transform 0.2s;
}

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

.icono { font-size: 45px; margin-bottom: 15px; }

.tarjeta h3 { 
    margin: 10px 0; 
    color: #2c3e50; 
    font-size: 1.3rem; 
}

.tarjeta p { 
    font-size: 14px; 
    color: #7f8c8d; 
    margin-bottom: 25px;
    line-height: 1.4;
}

.boton {
    display: inline-block;
    background-color: #2c3e50;
    color: white;
    padding: 12px 20px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 13px;
    transition: background 0.3s;
}

.boton:hover {
    background-color: #34495e;
}