:root {
    --primary-color: #2c7db1; /* Azul Reprofot */
    --secondary-color: #333333; /* Texto principal */
    --light-gray: #f4f4f4; /* Fondos claros */
    --white: #ffffff;
    --dark-text: #222222;
    --text-color: #555555;
    --border-color: #e0e0e0;
    --transition-speed: 0.3s;
    --font-main: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --max-width: 1200px;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    padding-top: 80px; /* Space for fixed header */
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

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

/* Container */
.container {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
.main-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 15px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.logo img {
    height: 50px; /* Adjust based on actual logo ratio */
}

/* Navigation */
.main-nav ul {
    display: flex;
    gap: 25px;
}

.main-nav a {
    color: var(--white);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    padding: 5px 0;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--white);
    transition: width var(--transition-speed);
}

.main-nav a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background-color: var(--light-gray);
    padding: 60px 0;
    overflow: hidden;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.hero-text strong {
    color: var(--dark-text);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-image img {
    max-width: 450px;
    border-radius: 8px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

/* Services Tabs */
.services-section {
    padding: 60px 0;
}

.tabs-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    padding: 12px 25px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    position: relative;
    transition: color 0.3s;
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

.service-card {
    display: flex;
    gap: 30px;
    align-items: start;
    background: var(--white);
    padding: 30px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.service-card img {
    width: 300px;
    object-fit: cover;
    border-radius: 5px;
}

.service-info h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* Portfolio Grid */
.portfolio-section {
    padding: 60px 0;
    background-color: #fafafa;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
    color: var(--dark-text);
}

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

.filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 20px;
    margin: 5px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.portfolio-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.4s;
}

.portfolio-item:hover img {
    transform: scale(1.05);
}

/* Footer */
footer {
    background-color: #222;
    color: #ccc;
    padding: 50px 0 20px;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.2rem;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
    padding-bottom: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        padding: 0 10px;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--white);
        transition: left 0.3s;
        border-top: 1px solid var(--border-color);
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }
    
    .main-nav a {
        color: var(--dark-text);
        display: block;
        padding: 15px 0;
        border-bottom: 1px solid #f0f0f0;
    }

    .hero-content {
        flex-direction: column-reverse; /* Image on top mobile or text? usually image top or text */
        text-align: center;
    }
    
    .service-card {
        flex-direction: column;
    }
    
    .service-card img {
        width: 100%;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}