/* --- 1. VARIABLES Y RESET --- */
:root {
    --primary: #C5A059;
    --primary-light: #D4AF37;
    --dark: #1A1A1A;
    --darker: #0F0F0F;
    --light: #F5F5F5;
    --grey-text: #888;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    --header-height: 72px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--dark);
    color: var(--light);
    line-height: 1.7;
    overflow-x: hidden;
    font-weight: 300;
}

h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--light);
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* --- NAVEGACIÓN --- */
header {
    background: rgba(26, 26, 26, 0.98);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #333;
    backdrop-filter: blur(10px);
    height: var(--header-height);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-text {
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    font-size: 1.2rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--light);
}

.nav-logo-img {
    height: 40px;
    filter: brightness(1.2);
}

nav ul { display: flex; gap: 2.5rem; }

nav a {
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    font-size: 0.75rem;
    letter-spacing: 2px;
    transition: var(--transition);
    text-transform: uppercase;
    color: var(--grey-text);
}

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

/* Hamburger button — hidden on desktop */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    cursor: pointer;
    z-index: 1100;
    background: none;
    border: none;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--light);
    border-radius: 2px;
    transition: var(--transition);
}

/* Animate hamburger to X when active */
.menu-toggle.is-active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.menu-toggle.is-active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.is-active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.btn-cta {
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 0.7rem 1.8rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: var(--transition);
    display: inline-block;
    background: transparent;
    white-space: nowrap;
}

.btn-cta:hover {
    background: var(--primary);
    color: var(--dark);
    box-shadow: 0 10px 20px rgba(197, 160, 89, 0.2);
}

/* --- SECCIONES --- */
.section-padding { padding: 8rem 10%; }

.section-title {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.section-title p {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: var(--primary);
    font-size: 1.3rem;
    max-width: 700px;
    margin: 1rem auto 0;
}

.line {
    width: 60px;
    height: 2px;
    background: var(--primary);
    margin: 0 auto;
}

/* --- HERO (index) --- */
#hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: calc(var(--header-height) + 4rem) 10% 4rem;
    background: linear-gradient(to right, rgba(15,15,15,0.9) 30%, rgba(15,15,15,0.2)),
                url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
}

#hero h1 {
    font-size: 5rem;
    margin-bottom: 2rem;
    max-width: 900px;
    font-weight: 700;
}

#hero h1 span {
    color: var(--primary);
    display: block;
    font-style: italic;
    font-weight: 400;
}

#hero p {
    font-size: 1.1rem;
    max-width: 500px;
    margin-bottom: 3rem;
    color: #ccc;
    border-left: 2px solid var(--primary);
    padding-left: 20px;
}

/* --- HERO CATÁLOGO --- */
#hero-catalog {
    padding: calc(var(--header-height) + 5rem) 5% 5rem;
    text-align: center;
    background: var(--darker);
    border-bottom: 1px solid #333;
}

#hero-catalog h1 { font-size: 4rem; margin-bottom: 1rem; }
#hero-catalog h1 span { color: var(--primary); font-style: italic; }
#hero-catalog p { color: var(--grey-text); max-width: 600px; margin: 0 auto; }

/* --- BENEFICIOS / VALOR --- */
.value-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.value-item {
    text-align: center;
    padding: 2rem;
    transition: var(--transition);
}

.value-item i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.value-item h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-family: 'Playfair Display', serif;
}

.value-item p {
    color: var(--grey-text);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* --- GRID DE PRODUCTOS (2x2) --- */
.services-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(2, 1fr);
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: #222;
    padding: 4rem 3rem;
    border: 1px solid #333;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--primary);
    background: #282828;
}

.card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 2rem;
}

.card h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.card p {
    color: var(--grey-text);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.card-number {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: rgba(197, 160, 89, 0.1);
    font-size: 4rem;
}

.brand-tag {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    border-top: 1px solid #444;
    padding-top: 1.5rem;
    margin-top: auto;
    display: block;
}

/* --- IMPLEMENTACIÓN LOOP --- */
.implementation-loop-container { width: 100%; }

.implementation-card {
    background: #1a1a1a;
    border: 1px solid #333;
    padding: 5rem;
    text-align: center;
    max-width: 1000px;
    margin: 5rem auto 0;
}

.loop-title h3 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.loop-subtitle {
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 0.8rem;
}

.loop-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    text-align: left;
}

.loop-icon {
    font-size: 3rem !important;
    color: var(--primary);
    opacity: 0.5;
}

.loop-steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin-top: 4rem;
}

.loop-step {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--light);
    border: 1px solid #444;
    padding: 0.8rem 1.5rem;
}

/* --- CATÁLOGO DE PRODUCTOS --- */
.catalog-container { padding: 5rem 5%; max-width: 1400px; margin: 0 auto; }

.product-row {
    display: flex;
    align-items: center;
    gap: 5rem;
    margin-bottom: 8rem;
}

.product-row:nth-child(even) { flex-direction: row-reverse; }

.product-images {
    flex: 1;
    display: grid;
    gap: 12px;
    align-self: stretch;
}

/* 2-image layout: stacked vertically, each image same height */
.product-images.img-count-2 {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(2, 230px);
}

/* 3-image layout: first image spans full width, two equal ones below */
.product-images.img-count-3 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: 290px 170px;
}

.product-images.img-count-3 img:first-child {
    grid-column: 1 / -1;
}

.product-images img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    display: block;
}

.product-images img:hover { transform: scale(1.02); }

.product-info { flex: 1; }
.product-info h2 { font-size: 2.5rem; margin-bottom: 1rem; color: var(--primary); }
.product-info .subtitle {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--grey-text);
    margin-bottom: 2rem;
    display: block;
}
.product-info p { margin-bottom: 1.5rem; color: #ccc; }

.specs-list { margin-top: 2rem; border-top: 1px solid #333; padding-top: 2rem; }
.specs-list li { margin-bottom: 1rem; display: flex; gap: 10px; align-items: flex-start; }
.specs-list i { color: var(--primary); margin-top: 5px; font-size: 0.9rem; flex-shrink: 0; }
.specs-list strong { color: var(--light); font-weight: 600; }

/* --- CONTACTO --- */
.contact-form {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    display: block;
}

.contact-form button.submit {
    align-self: center;
    padding: 1.2rem 4rem;
    width: auto;
}

input, textarea {
    background: transparent;
    border: none;
    border-bottom: 1px solid #444;
    padding: 1.5rem 0.5rem;
    color: white;
    font-family: 'Montserrat', sans-serif;
    margin-bottom: 1rem;
    transition: var(--transition);
    border-radius: 0;
    width: 100%;
}

input:focus, textarea:focus {
    outline: none;
    border-bottom-color: var(--primary);
}

button.submit {
    margin-top: 2rem;
    background: var(--primary);
    border: 1px solid var(--primary);
    padding: 1.2rem;
    color: var(--dark);
    font-weight: 700;
    letter-spacing: 2px;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Montserrat', sans-serif;
    font-size: 0.8rem;
}

button.submit:hover {
    background: transparent;
    color: var(--primary);
}

/* --- LOGOS DE MARCAS --- */
.brands-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 4rem;
    padding: 2rem 0;
    margin-top: 3rem;
}

.brand-logo-item {
    height: 50px;
    width: 150px;
    display: flex;
    justify-content: center;
    align-items: center;
    filter: grayscale(100%) opacity(0.6);
    transition: var(--transition);
}

.brand-logo-item:hover {
    filter: grayscale(0%) opacity(1);
}

.brand-logo-item img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

/* --- FOOTER --- */
footer {
    padding: 5rem 10%;
    background: #0a0a0a;
    border-top: 1px solid #222;
    text-align: center;
}

/* --- ANIMACIONES REVEAL --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }

/* =====================================================
   RESPONSIVE
   ===================================================== */

/* Tablet & below */
@media (max-width: 1024px) {
    /* Show hamburger */
    .menu-toggle {
        display: flex;
    }

    /* Hide CTA button in header to save space */
    header > .btn-cta {
        display: none;
    }

    /* Nav becomes fullscreen dropdown */
    nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: rgba(10, 10, 10, 0.98);
        padding: 2.5rem 0;
        text-align: center;
        border-bottom: 1px solid var(--primary);
        backdrop-filter: blur(10px);
    }

    nav.active {
        display: block;
    }

    nav ul {
        flex-direction: column;
        gap: 2rem;
    }

    nav a {
        font-size: 1rem;
    }

    /* Two-column grid → one column */
    .services-grid {
        grid-template-columns: 1fr;
    }

    .section-title h2 {
        font-size: 2.5rem;
    }

    .implementation-card {
        padding: 3rem 2rem;
    }

    .loop-header {
        flex-direction: column;
        text-align: center;
    }

    .loop-steps {
        flex-direction: column;
        gap: 1rem;
    }

    .loop-steps .fa-arrow-right {
        transform: rotate(90deg);
    }
}

/* Mobile */
@media (max-width: 768px) {
    #hero h1 {
        font-size: 2.8rem;
    }

    #hero-catalog h1 {
        font-size: 2.4rem;
    }

    .section-padding {
        padding: 5rem 6%;
    }

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

    .section-title p {
        font-size: 1rem;
    }

    /* Catalog rows stack vertically */
    .product-row,
    .product-row:nth-child(even) {
        flex-direction: column;
        gap: 2.5rem;
        margin-bottom: 5rem;
    }

    .product-images.img-count-2 {
        grid-template-rows: repeat(2, 200px);
    }

    .product-images.img-count-3 {
        grid-template-rows: 220px 140px;
    }

    .product-info h2 {
        font-size: 2rem;
    }

    .card {
        padding: 3rem 2rem;
    }

    .card h3 {
        font-size: 1.6rem;
    }

    footer {
        padding: 3rem 6%;
    }
}

/* Small phones */
@media (max-width: 480px) {
    #hero h1 {
        font-size: 2.2rem;
    }

    .logo-text {
        font-size: 1rem;
        letter-spacing: 2px;
    }
}