:root {
    --primary-color: #003366;
    --secondary-color: #fca311;
    --dark-color: #14213d;
    --light-color: #ffffff;
    --gray-color: #e5e5e5;
    --text-color: #333333;
    
    --adce-color: #1a4f8b;
    --rs-color: #2c3e50;
    --rl-color: #d35400;
    --virza-color: #27ae60;
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: #f9f9f9;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 15px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--light-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-logo img {
    height: 50px;
}

.logo-grupo {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.header-nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.header-nav a {
    font-weight: 600;
    color: var(--dark-color);
    padding: 10px;
}

.header-nav a:hover, .header-nav a.active {
    color: var(--secondary-color);
}

.header-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 80vh;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://placehold.co/1920x1080/333/fff?text=Construccion+y+Desarrollo') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--light-color);
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    animation: fadeInUp 1s ease;
}

.btn {
    padding: 12px 25px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    border: none;
}

.btn-primario {
    background-color: var(--secondary-color);
    color: var(--dark-color);
}

.btn-primario:hover {
    background-color: #e09010;
}

.btn-secundario {
    background-color: transparent;
    color: var(--light-color);
    border: 2px solid var(--light-color);
}

.btn-secundario:hover {
    background-color: var(--light-color);
    color: var(--dark-color);
}

/* Secciones generales */
section {
    padding: 80px 0;
}

section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 40px;
}

/* Empresas Card */
.empresas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.empresa-card {
    background: var(--light-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

.empresa-card:hover {
    transform: translateY(-10px);
}

.empresa-card-header {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.empresa-card-header img {
    max-height: 80px;
    max-width: 100%;
}

.empresa-card-header.adce { background-color: var(--adce-color); }
.empresa-card-header.rs { background-color: var(--rs-color); }
.empresa-card-header.rl { background-color: var(--rl-color); }
.empresa-card-header.virza { background-color: var(--virza-color); }

.empresa-card-body {
    padding: 25px;
    text-align: center;
}

.empresa-card-body h3 {
    font-size: 1.2rem;
}

.empresa-card-body h3.adce { color: var(--adce-color); }
.empresa-card-body h3.rs { color: var(--rs-color); }
.empresa-card-body h3.rl { color: var(--rl-color); }
.empresa-card-body h3.virza { color: var(--virza-color); }

.empresa-card-body p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 20px;
    min-height: 80px;
}

.btn-card {
    display: inline-block;
    font-weight: 600;
    font-size: 0.9rem;
}
.btn-card.adce { color: var(--adce-color); }
.btn-card.rs { color: var(--rs-color); }
.btn-card.rl { color: var(--rl-color); }
.btn-card.virza { color: var(--virza-color); }

/* Contacto */
.contacto {
    background-color: var(--gray-color);
}

.contacto-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: 'Poppins', sans-serif;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.info-item i {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer h3 {
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer ul li a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    font-size: 0.9rem;
}

/* Animaciones */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .header-nav { display: none; }
    .header-menu-btn { display: block; }
    .hero-content h2 { font-size: 2rem; }
    .contacto-grid { grid-template-columns: 1fr; }
}