* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Montserrat', sans-serif; color: #333; background-color: #f4f4f4; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Header */
header { background: #ffffff; padding: 20px 0; border-bottom: 1px solid #ddd; }
nav { display: flex; justify-content: space-between; align-items: center; }
nav ul { display: flex; list-style: none; }
nav ul li a { text-decoration: none; color: #003882; font-size: 13px; font-weight: 700; margin-left: 25px; }

/* Hero */
.hero { 
    height: 70vh; 
    background: linear-gradient(rgba(3, 73, 152, 0.2), rgba(0,0,0,0.2)), url('desarrollo1.jpg') center/cover;
    display: flex; align-items: center; justify-content: center; text-align: center;
}
.hero h1 { color: #ffffff; font-size: 4rem; margin-bottom: 20px; text-shadow: 2px 2px 10px rgba(0,0,0,0.5); }
.btn-hero { 
    background: rgba(0,0,0,0.7); color: #fff; padding: 12px 30px; 
    text-decoration: none; border-radius: 3px; font-size: 14px;
}

/* About */
.about { padding: 60px 0; }
.about h2 { margin-bottom: 20px; font-size: 24px; }
.about-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin-top: 30px; }
.about-gallery img { width: 100%; height: 200px; object-fit: cover; }
.slider-dots { text-align: center; margin-top: 20px; }
.dot { height: 10px; width: 10px; background: #bbb; border-radius: 50%; display: inline-block; margin: 0 5px; }
.dot.active { background: #8e743d; }

.separator { border: 0; border-top: 1px solid #ddd; margin: 40px 0; }

/* Projects Grid (Efecto Escalonado) */
.projects-grid { position: relative; height: 500px; margin-top: 40px; }
.card { position: absolute; background-size: cover; background-position: center; box-shadow: 10px 10px 20px rgba(0,0,0,0.2); }
.card-overlay { background: rgba(0,0,0,0.3); width: 100%; height: 100%; padding: 20px; display: flex; flex-direction: column; justify-content: center; color: #fff; }

.card-large { width: 60%; height: 250px; top: 0; left: 0; background-image: url('desarrollo1.jpg'); }
.card-medium { width: 55%; height: 250px; top: 50px; right: 0; background-image: url('desarrollo2.jpg'); }
.card-small { width: 50%; height: 200px; bottom: 0; left: 20%; background-image: url('desarrollo3.jpg'); }

/* Footer */
.footer-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 40px; padding: 60px 0; }
input, textarea { width: 100%; padding: 10px; margin-bottom: 10px; border: 1px solid #ccc; }
button { background: #333; color: #fff; border: none; padding: 10px 25px; cursor: pointer; }
.bottom-bar { height: 50px; background: #1a2a35; margin-top: 40px; }