:root {
    --primary: #E31C23;
    --primary-dark: #b9151b;
    --secondary: #FFD100;
    --text-main: #1f2937;
    --text-light: #6b7280;
    --bg-body: #f9fafb;
    --bg-card: #ffffff;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
header {
    background-color: var(--bg-card);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--text-main);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary);
}

/* Mobile Menu Button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-main);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://placehold.co/1920x800?text=EDS+Terpel+Girardota');
    background-size: cover;
    background-position: center;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-bottom: 4rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid var(--primary);
}

.btn:hover {
    background-color: transparent;
    color: white;
}

/* Services Grid */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: var(--primary);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background-color: var(--secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    padding-bottom: 4rem;
}

.service-card {
    background: var(--bg-card);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    top: 0;
}

.service-card:hover {
    top: -10px;
    box-shadow: var(--shadow-hover);
}

.card-image {
    height: 250px;
    overflow: hidden;
    position: relative;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.service-card:hover .card-image img {
    transform: scale(1.1);
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.card-content p {
    color: var(--text-light);
}

/* Tracking/Stats Section */
.stats-section {
    background-color: var(--primary);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.stats-container {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.stat-item {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 1rem;
    min-width: 200px;
    backdrop-filter: blur(5px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--secondary);
    display: block;
}

.stat-label {
    font-size: 1.2rem;
    font-weight: 500;
}

/* Footer */
footer {
    background-color: #111;
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    color: var(--secondary);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col ul li a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

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

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #333;
    color: #888;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--bg-card);
        padding: 1rem;
        box-shadow: var(--shadow);
        text-align: center;
    }

    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .nav-wrapper {
        padding: 0 1rem;
    }
}

/* Animations */
.hidden-element { opacity: 0; transform: translateY(30px); transition: all 0.6s ease-out; }
.visible { opacity: 1; transform: translateY(0); }