:root {
    --primary-color: #e67e22; /* Naranja Industrial */
    --secondary-color: #2c3e50; /* Gris Azulado Oscuro */
    --bg-dark: #1a1a1a; /* Negro Carbón */
    --text-light: #ecf0f1;
    --metallic: linear-gradient(145deg, #34495e, #2c3e50);
    --transition: all 0.3s ease-in-out;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #f4f4f4;
    color: var(--secondary-color);
    line-height: 1.6;
}

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

/* --- Header & Navigation --- */
#main-header {
    background: var(--bg-dark);
    height: 80px;
    display: flex;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 3px solid var(--primary-color);
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

#main-header.scrolled {
    height: 65px;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(5px);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    color: var(--text-light);
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
}

.gear-logo {
    font-size: 2rem;
    color: var(--primary-color);
    margin-right: 10px;
    animation: rotateGear 10s linear infinite;
}

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

/* Menú */
.nav-menu {
    display: flex;
    list-style: none;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 10px 15px;
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    position: relative;
    transition: var(--transition);
}

/* Efecto Hover Mecánico */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--primary-color);
    text-shadow: 0 0 8px rgba(230, 126, 34, 0.5);
}

.nav-link:hover::after {
    width: 80%;
}

/* --- Mobile Menu (Hamburger) --- */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: var(--transition);
    background-color: var(--text-light);
}

/* --- Animaciones --- */
@keyframes rotateGear {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .hamburger { display: block; }

    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--bg-dark);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 20px rgba(0,0,0,0.5);
        border-bottom: 5px solid var(--primary-color);
    }

    .nav-menu.active { left: 0; }
    .nav-item { margin: 15px 0; }
    .nav-link { display: block; padding: 20px; }
}

/* Estilo para el Hero de ejemplo */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1537462715879-360eeb61a0ad?auto=format&fit=crop&q=80&w=1600') no-repeat center center/cover;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
    padding-top: 80px;
}

.hero h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    margin-bottom: 10px;
}