:root {
    --bk-primary: #111111;
    --bk-secondary: #1a1a1a;
    --bk-card: #222222;
    --bk-yellow: #ffb700; /* Amarillo industrial característico de la referencia */
    --bk-yellow-hover: #ffa200;
    --bk-text: #ffffff;
    --bk-text-muted: #999999;
    --bk-border: #333333;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bk-primary);
    color: var(--bk-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Barra de Aviso Legal Google Ads (Top Extremo) */
.ads-top-disclaimer {
    background-color: #261d0a;
    border-bottom: 1px solid #4a370e;
    color: #ffda73;
    font-size: 0.76rem;
    padding: 8px 20px;
    text-align: center;
}
.disclaimer-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.disclaimer-badge {
    background: rgba(255, 183, 0, 0.2);
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.68rem;
}

/* Barra Superior de Contacto (Estilo exacto de la referencia) */
.top-info-bar {
    background-color: #0b0b0b;
    border-bottom: 1px solid var(--bk-border);
    padding: 10px 0;
    font-size: 0.82rem;
    color: var(--bk-text-muted);
}
.top-info-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-info-left {
    display: flex;
    gap: 20px;
}
.top-info-left span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Header Principal Estilo Buildkon */
.buildkon-header {
    background-color: var(--bk-primary);
    border-bottom: 1px solid var(--bk-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.header-main-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
    height: 90px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.brand-logo-main {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--bk-text);
    text-decoration: none;
    letter-spacing: -0.5px;
}
.brand-logo-main span {
    color: var(--bk-yellow);
}
.nav-menu-list {
    display: flex;
    gap: 30px;
    align-items: center;
    list-style: none;
}
.nav-menu-list a {
    color: var(--bk-text);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    transition: color 0.2s;
}
.nav-menu-list a:hover, .nav-menu-list a.active {
    color: var(--bk-yellow);
}
.btn-header-cta {
    background-color: var(--bk-yellow);
    color: #111111 !important;
    padding: 12px 24px;
    font-weight: 700;
    border-radius: 2px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}
.btn-header-cta:hover {
    background-color: var(--bk-yellow-hover);
}

/* Hero Estilo Referencia (Fondo con Imagen Real y Superposición Oscura) */
.hero-buildkon {
    position: relative;
    padding: 140px 20px 100px 20px;
    background: linear-gradient(rgba(17,17,17,0.85), rgba(17,17,17,0.92)), url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
    border-bottom: 1px solid var(--bk-border);
}
.hero-content-box {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.hero-badge-tag {
    display: inline-block;
    background-color: rgba(255, 183, 0, 0.15);
    color: var(--bk-yellow);
    padding: 6px 16px;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    border-radius: 2px;
}
.hero-content-box h1 {
    font-size: 3.8rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 25px;
    letter-spacing: -1px;
}
.hero-content-box h1 span {
    color: var(--bk-yellow);
}
.hero-content-box p {
    color: var(--bk-text-muted);
    font-size: 1.15rem;
    margin-bottom: 40px;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
}
.hero-buttons-group {
    display: flex;
    gap: 15px;
    justify-content: center;
}
.btn-yellow-solid {
    background-color: var(--bk-yellow);
    color: #111111;
    padding: 15px 35px;
    font-weight: 800;
    text-decoration: none;
    font-size: 0.95rem;
    border-radius: 2px;
    transition: background-color 0.2s;
}
.btn-yellow-solid:hover {
    background-color: var(--bk-yellow-hover);
}
.btn-outline-dark {
    border: 2px solid var(--bk-border);
    color: var(--bk-text);
    background: transparent;
    padding: 15px 35px;
    font-weight: 700;
    text-decoration: none;
    font-size: 0.95rem;
    border-radius: 2px;
    transition: border-color 0.2s, color 0.2s;
}
.btn-outline-dark:hover {
    border-color: var(--bk-yellow);
    color: var(--bk-yellow);
}

/* Cuadrícula de Características / Servicios Estilo Buildkon */
.features-grid-section {
    padding: 100px 20px;
    background-color: var(--bk-secondary);
}
.features-container {
    max-width: 1300px;
    margin: 0 auto;
}
.section-title-center {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px auto;
}
.section-title-center span {
    color: var(--bk-yellow);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 10px;
}
.section-title-center h2 {
    font-size: 2.6rem;
    font-weight: 900;
    letter-spacing: -0.5px;
}

.cards-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.card-item-box {
    background-color: var(--bk-card);
    border: 1px solid var(--bk-border);
    padding: 45px 35px;
    position: relative;
    transition: transform 0.3s, border-color 0.3s;
}
.card-item-box:hover {
    transform: translateY(-5px);
    border-color: var(--bk-yellow);
}
.card-number-bg {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.03);
}
.card-item-box h3 {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 15px;
}
.card-item-box p {
    color: var(--bk-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Sección de Contenido Dual con Fotografía Real */
.dual-showcase-section {
    padding: 120px 20px;
}
.dual-grid-layout {
    max-width: 1300px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.dual-image-box img {
    width: 100%;
    height: 460px;
    object-fit: cover;
    border-radius: 2px;
    border: 1px solid var(--bk-border);
}
.dual-text-box h2 {
    font-size: 2.4rem;
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
}
.dual-text-box p {
    color: var(--bk-text-muted);
    margin-bottom: 20px;
    font-size: 1rem;
}
.bullet-list-custom {
    list-style: none;
    margin-top: 25px;
}
.bullet-list-custom li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    font-size: 0.96rem;
    font-weight: 600;
}
.bullet-list-custom li::before {
    content: "✔";
    position: absolute;
    left: 0;
    color: var(--bk-yellow);
    font-weight: 900;
}

/* Footer Estilo Industrial Pesado */
.industrial-footer {
    background-color: #080808;
    border-top: 1px solid var(--bk-border);
    padding: 80px 20px 30px 20px;
}
.footer-grid-layout {
    max-width: 1300px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 60px;
}
.footer-col-main p {
    color: var(--bk-text-muted);
    font-size: 0.9rem;
    margin-top: 15px;
    line-height: 1.7;
}
.footer-col-links h4 {
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 20px;
}
.footer-col-links ul {
    list-style: none;
}
.footer-col-links ul li {
    margin-bottom: 12px;
}
.footer-col-links ul li a {
    color: var(--bk-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}
.footer-col-links ul li a:hover {
    color: var(--bk-yellow);
}
.footer-bottom-bar {
    max-width: 1300px;
    margin: 0 auto;
    border-top: 1px solid var(--bk-border);
    padding-top: 30px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--bk-text-muted);
}

@media (max-width: 1024px) {
    .dual-grid-layout, .footer-grid-layout, .cards-grid-3, .top-info-container {
        grid-template-columns: 1fr;
        flex-direction: column;
        gap: 30px;
    }
    .hero-content-box h1 {
        font-size: 2.8rem;
    }
}