:root {
    --primary-green: #2ecc71;
    --dark-forest: #050c09; /* Color base oscuro */
    --black-footer: #000000; /* Negro puro para el footer */
    --accent-lime: #a2d149;
    --text-light: #f4f4f4;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--dark-forest);
    color: var(--text-light);
    overflow-x: hidden;
    line-height: 1.6;
}

/* 1. INTEGRACIÓN DE IMAGEN DE FONDO + ENERGÍA DINÁMICA */
#eco-canvas-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    /* IMAGEN DE FONDO: Bosque Tech */
    background-image: 
        /* Capa 1: El brillo verde interactivo que sigue al mouse */
        radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), 
        rgba(46, 204, 113, 0.15) 0%, 
        transparent 50%),
        /* Capa 2: Filtro oscuro para asegurar legibilidad del texto */
        linear-gradient(rgba(5, 12, 9, 0.85), rgba(5, 12, 9, 0.95)),
        /* Capa 3: La imagen de fondo real */
        url('img/fondo.jfif');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -1;
    transition: background 0.1s ease;
}

/* CENTRADO GENERAL Y LAYOUT */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

/* 2. MENÚ MÁS MODERNO */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(5, 12, 9, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 1px;
    color: var(--text-light);
}

.accent-logo { color: var(--primary-green); }

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 400;
    transition: 0.3s;
    opacity: 0.8;
}

.nav-links a:hover {
    color: var(--primary-green);
    opacity: 1;
}

/* Botón CTA en el menú */
.cta-nav {
    border: 1px solid var(--primary-green);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.cta-nav:hover {
    background: var(--primary-green);
    color: var(--dark-forest) !important;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3);
}

/* SECCIONES PRINCIPALES */
header.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 80px; /* Espacio para el menú fijo */
}

h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.accent-text {
    background: linear-gradient(90deg, var(--primary-green), var(--accent-lime));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* GLASSMORPHISM POTENCIADO */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
}

.card {
    background: var(--glass);
    padding: 3rem;
    border-radius: 24px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.card:hover {
    border-color: var(--primary-green);
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(46, 204, 113, 0.15);
}

/* 3. FOOTER CENTRADO Y NEGRO */
.footer-dark {
    background-color: var(--black-footer);
    color: rgba(255, 255, 255, 0.6);
    padding: 3rem 0;
    margin-top: 5rem;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.footer-tagline {
    font-weight: 300;
    letter-spacing: 1px;
    color: var(--primary-green);
}
/* BOTÓN EXPLORE OUR PILLARS */
.btn-primary, 
.btn-primary:visited {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--primary-green) !important; /* Fuerza el verde */
    color: var(--dark-forest) !important; /* Texto oscuro para contraste */
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    margin-top: 2rem;
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-5px);
    background-color: var(--accent-lime) !important; /* Cambia a lima al pasar el mouse */
    box-shadow: 0 10px 20px rgba(46, 204, 113, 0.3);
    color: var(--dark-forest) !important;
}