/* CSS Moderno: Variables, Reset, Mobile-first SIN hamburguesa */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a1a1a;
    --secondary: #4a5568;
    --accent: #3182ce;
    --gold: #d4af37;
    --bg-light: #f7fafc;
    --white: #fff;
    --shadow: 0 20px 40px rgba(0,0,0,0.1);
    --shadow-hover: 0 30px 60px rgba(0,0,0,0.2);
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--primary);
    overflow-x: hidden;
}

/* Navbar SIMPLIFICADA: Siempre horizontal */
#navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

#navbar h2 {
    font-size: clamp(1.4rem, 4vw, 2rem);
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
}

#menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
    margin: 0;
    padding: 0;
}

#menu li {
    position: relative;
}

#menu a {
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    white-space: nowrap;
    border-radius: 8px;
}

#menu a.active,
#menu a:hover {
    color: var(--accent);
    background: rgba(49, 130, 206, 0.1);
}

#menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

#menu a:hover::after,
#menu a.active::after {
    width: 80%;
}

/* Hero con gradiente industrial + textura grano */
.hero {
    height: 100vh;
    background: 
        linear-gradient(135deg, #0f0f0f 0%, #2d3748 100%),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cdefs%3E%3Cpattern id='grain' width='100' height='100' patternUnits='userSpaceOnUse'%3E%3Ccircle cx='25' cy='25' r='1' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='75' cy='75' r='1' fill='rgba(255,255,255,0.05)'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100' height='100' fill='url(%23grain)'/%3E%3C/svg%3E");
    background-size: cover, 100px;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.overlay {
    text-align: center;
    color: var(--white);
    z-index: 2;
    max-width: 800px;
    padding: 0 2rem;
}

.logo {
    width: clamp(100px, 20vw, 200px);
    height: auto;
    margin-bottom: 2rem;
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.5));
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.hero p {
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    opacity: 0.9;
    margin-bottom: 2rem;
}

/* Animaciones fade-up */
.fade-up {
    opacity: 0;
    transform: translateY(50px);
    transition: var(--transition);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Secciones generales */
section {
    padding: 5rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

section h2 {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 3rem;
    color: var(--primary);
}

/* Grid Servicios responsivo */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--gold));
}

.card:hover {
    transform: translateY(-15px);
    box-shadow: var(--shadow-hover);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.card:hover img {
    transform: scale(1.05);
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.card p {
    color: var(--secondary);
}

/* Nosotros dark */
.dark {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    color: var(--white);
}

.dark p {
    font-size: 1.3rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.95;
}

/* Slider Clientes infinito */
.clientes {
    background: var(--bg-light);
}

.slider {
    overflow: hidden;
    padding: 2rem 0;
}

.slide-track {
    display: flex;
    animation: scroll 40s linear infinite;
    gap: 2rem;
    align-items: center;
}

.slide-track img {
    height: 80px;
    width: auto;
    flex-shrink: 0;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.slide-track img:hover {
    transform: scale(1.1);
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* Contacto grid */
#contacto {
    background: var(--bg-light);
}

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

.contact-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.contact-card:hover {
    transform: scale(1.05) translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.contact-card i {
    font-size: 3.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
    display: block;
}

.contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.contact-card p {
    font-size: 1.1rem;
    color: var(--secondary);
}

/* WhatsApp flotante PRO */
.whatsapp {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 70px;
    height: 70px;
    background: #25D366;
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4);
    transition: var(--transition);
    z-index: 10000;
    text-decoration: none;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4); transform: scale(1); }
    50% { box-shadow: 0 10px 40px rgba(37, 211, 102, 0.7); transform: scale(1.05); }
    100% { box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4); transform: scale(1); }
}

.whatsapp:hover {
    transform: scale(1.15) rotate(360deg);
    background: #128C7E;
    color: var(--white);
}

/* Footer */
footer {
    background: var(--primary);
    color: var(--white);
    text-align: center;
    padding: 2rem;
    font-size: 0.9rem;
}

/* RESPONSIVO: Menú compacto en móvil (SIN hamburguesa) */
@media (max-width: 768px) {
    #navbar {
        padding: 0.8rem 5%;
        flex-direction: row;
        gap: 0.5rem;
        justify-content: space-between;
    }

    #navbar h2 {
        font-size: 1.5rem;
    }

    #menu {
        gap: 0.8rem;
    }

    #menu a {
        font-size: 0.9rem;
        padding: 0.4rem 0.6rem;
    }

    .hero {
        height: 80vh;
        background-position: center bottom;
    }

    section {
        padding: 3rem 5%;
    }

    .whatsapp {
        bottom: 20px;
        right: 20px;
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }

    .slide-track {
        gap: 1rem;
        animation-duration: 30s;
    }

    .slide-track img {
        height: 60px;
    }
}

@media (max-width: 480px) {
    #navbar {
        padding: 0.7rem 3%;
    }

    #menu {
        gap: 0.5rem;
    }

    #menu a {
        font-size: 0.85rem;
        padding: 0.3rem 0.5rem;
    }

    .grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    section h2 {
        font-size: 2rem;
    }
}