@import url('https://fonts.googleapis.com/css2?family=Jost:wght@300;400;600;700&display=swap');

  :root {
    --bg-dark: #1a1a1a;
    --menu-bg: #262626;
    --text-light: #ffffff;
    --text-muted: #a6a6a6;
    --accent-gold: #c8a75a;
    --overlay: rgba(0, 0, 0, 0.4);
    --maxw: 1400px;
    --font-main: 'Jost', sans-serif;
  }

  /* Reset & base */
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html,
  body {
    height: 100%;
  }

  body {
    margin: 0;
    font-family: var(--font-main);
    color: var(--text-light);
    background: var(--bg-dark);
    line-height: 1.6;
    overflow-x: hidden;
  }

  body.menu-open {
    overflow: hidden;
  }

  .logo-bprincipal {
    position: absolute;
    width: 150px;
    z-index: 500;
    cursor: pointer;
    opacity: 0.9;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .logo-bprincipal:hover {
    opacity: 0.8;
    transform: scale(1.08);
    transition: all 0.3s ease;
  }

  .presentacion-pic img {
    width: 100%;       /* ocupa todo el ancho disponible */
    height: auto;      /* mantiene la proporción */
    max-width: 1200px; /* opcional: límite máximo en pantallas grandes */
    display: block;    /* elimina espacios extra */
    margin: 0 auto;    /* centra la imagen */
  }


  a {
    text-decoration: none;
    color: inherit;
  }

  /* Layout */
  .site {
    display: grid;
    grid-template-rows: auto 1fr auto;
    min-height: 100vh;
  }

  .container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 80px;
  }

  @media (max-width: 768px) {
    .container {
      padding: 0 30px;
    }
  }

  /* Hero */
  .hero {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 92vh;
    isolation: isolate;
    background: #111;
    overflow: hidden;
  }

  /* Replace URL(...) con tu imagen de fondo */
  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: var(--hero-bg);
    background-size: cover;
    background-position: center;
    filter: brightness(0.85) saturate(1.05);
    z-index: -2;
  }

  .hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.35), var(--overlay));
    z-index: -1;
  }

  .hero__video-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
    filter: brightness(0.85) saturate(1.05);
  }

  /* Header brand */
  .brand {
    position: absolute;
    top: 24px;
    left: 24px;
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    letter-spacing: 0.08em;
    font-weight: 600;
  }

  .brand__logo {
    font-size: 14px;
    color: var(--text-muted);
  }

  .brand__name {
    font-size: 14px;
    color: var(--text-light);
  }

  /* Content block */
  .hero__content {
    width: min(92vw, var(--maxw));
    padding-inline: 20px;
    display: grid;
    gap: clamp(20px, 4vw, 32px);
    text-align: center;
    z-index: 5;
  }

  .hero__title {
    display: grid;
    gap: 12px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
  }

  .hero__title .line {
    font-weight: 300;
    color: var(--text-light);
    line-height: 1.1;
  }

  .hero__title .line--small {
    font-size: clamp(10px, 2vw, 13px);
    color: var(--accent-gold);
    letter-spacing: 0.3em;
    margin-bottom: 5px;
  }

  .hero__title .line--main {
    font-size: clamp(28px, 6vw, 64px);
    max-width: 20ch;
    margin-inline: auto;
  }

  .hero__divider {
    width: 1px;
    height: clamp(40px, 8vh, 80px);
    margin: 0 auto;
    background: linear-gradient(to bottom, transparent, var(--accent-gold), transparent);
    opacity: 0.8;
  }

  .hero__tagline {
    width: min(65ch, 100%);
    margin: 0 auto;
    font-size: clamp(14px, 2.5vw, 18px);
    color: var(--text-muted);
    font-weight: 300;
    letter-spacing: 0.02em;
    line-height: 1.6;
  }

  /* Footer signature */
  .hero__signature {
    position: absolute;
    bottom: clamp(20px, 5vh, 40px);
    left: clamp(20px, 5vw, 60px);
    display: grid;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-muted);
    font-size: clamp(9px, 1.5vw, 11px);
    z-index: 5;
  }

  .hero__signature .strong {
    color: var(--text-light);
    font-weight: 600;
  }

  /* Hero Scroll Indicator */
  .hero__scroll {
    position: absolute;
    bottom: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    color: var(--text-muted);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-decoration: none;
    z-index: 10;
    transition: color 0.3s ease;
  }

  .hero__scroll:hover {
    color: var(--text-light);
  }

  .hero__scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--text-muted), transparent);
    position: relative;
    overflow: hidden;
  }

  .hero__scroll-line::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--accent-gold);
    animation: scrollLineAnim 2s cubic-bezier(0.77, 0, 0.175, 1) infinite;
  }

  @keyframes scrollLineAnim {
    0% {
      transform: translateY(-100%);
    }

    100% {
      transform: translateY(100%);
    }
  }

  /* Animated Spheres */
  .hero__spheres {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
  }

  .sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    background: var(--accent-gold);
    animation: sphereFloat 20s infinite alternate ease-in-out;
  }

  .sphere--1 {
    width: 400px;
    height: 400px;
    top: -100px;
    right: -100px;
    animation-delay: -2s;
  }

  .sphere--2 {
    width: 300px;
    height: 300px;
    bottom: 10%;
    left: -50px;
    background: #fff;
    opacity: 0.05;
    animation-duration: 25s;
  }

  @keyframes sphereFloat {
    0% {
      transform: translate(0, 0) scale(1);
    }

    100% {
      transform: translate(-50px, 50px) scale(1.1);
    }
  }

  /* Presentacion Section */
  .presentacion {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: 140px 0;
    overflow: hidden;
    position: relative;
  }

  .presentacion-container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 0.8fr 1.4fr;
    gap: 60px;
    align-items: center;
  }

  .presentacion-texto {
    display: flex;
    flex-direction: column;
    gap: 30px;
  }

  .presentacion-label {
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 11px;
    color: var(--accent-gold);
    font-weight: 600;
    opacity: 0.8;
  }

  .presentacion-texto h2 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 300;
    margin: 0;
    line-height: 1.1;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-light);
  }

  .presentacion-divider {
    width: 80px;
    height: 1px;
    background: linear-gradient(to right, var(--accent-gold), transparent);
  }

  .presentacion-texto p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-muted);
    font-weight: 300;
    margin: 0;
    max-width: 50ch;
  }

  .btn-presentacion {
    display: inline-block;
    width: fit-content;
    padding: 18px 45px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 11px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 20px;
    background: transparent;
  }

  .btn-presentacion:hover {
    background-color: var(--text-light);
    color: var(--bg-dark);
    border-color: var(--text-light);
    transform: translateY(-5px);
  }

  .presentacion-imagen {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    position: relative;
  }

  .presentacion-pic {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    position: relative;
  }

  .presentacion-pic img,
  .presentacion-pic video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(20%) brightness(0.9);
    transition: transform 1.2s cubic-bezier(0.2, 1, 0.3, 1), filter 0.8s ease;
  }

  .presentacion-pic:hover img,
  .presentacion-pic:hover video {
    transform: scale(1.1);
    filter: grayscale(0%) brightness(1);
  }

  .presentacion-pic:nth-child(2) {
    margin-top: 80px;
  }

  /* Decorative element */
  .presentacion::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(200, 167, 90, 0.1), transparent);
    z-index: -1;
  }

  /* Responsive tweaks */
  @media (max-width: 1024px) {
    .presentacion-container {
      grid-template-columns: 1fr;
      gap: 60px;
      text-align: center;
    }

    .presentacion-texto {
      align-items: center;
    }

    .presentacion-divider {
      margin: 0 auto;
    }

    .presentacion-pic:nth-child(2) {
      margin-top: 0;
    }
  }

  @media (max-width: 640px) {
    .presentacion {
      padding: 80px 0;
    }

    .presentacion-imagen {
      grid-template-columns: 1fr;
    }
  }

  /* Proyectos & Servicios Sections */
  .proyectos-destacados,
  .servicios-destacados {
    background-color: var(--bg-dark);
    padding: 100px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }

  .proyectos-container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 40px;
  }

  .proyectos-titulo {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: 60px;
    color: var(--text-light);
    text-align: center;
    position: relative;
  }

  .proyectos-titulo::after {
    content: "";
    display: block;
    width: 40px;
    height: 1px;
    background-color: var(--accent-gold);
    margin: 20px auto 0;
  }

  .proyectos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
  }

  .proyecto-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
  }

  .proyecto-card {
    position: relative;
    overflow: hidden;
    background-color: #222;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .proyecto-imagen {
    width: 100%;
    aspect-ratio: 3/2;
    overflow: hidden;
  }

  .proyecto-imagen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.8);
    transition: transform 0.6s ease, filter 0.6s ease;
  }

  .proyecto-info {
    padding: 30px;
    background-color: #222;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    transition: background-color 0.4s ease;
  }

  .proyecto-info h3 {
    font-size: 18px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0 0 10px 0;
    color: var(--text-light);
  }

  .proyecto-info p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
    font-weight: 300;
    letter-spacing: 1px;
  }

  /* Hover Effects */
  .proyecto-card-link:hover .proyecto-card {
    transform: translateY(-10px);
  }

  .proyecto-card-link:hover .proyecto-imagen img {
    transform: scale(1.1);
    filter: brightness(1);
  }

  .proyecto-card-link:hover .proyecto-info {
    background-color: #2a2a2a;
  }

  .proyecto-card-link:hover .proyecto-info h3 {
    color: var(--accent-gold);
  }

  /* Responsive tweaks */
  @media (max-width: 768px) {
    .proyectos-grid {
      grid-template-columns: 1fr;
    }

    .proyectos-destacados,
    .servicios-destacados {
      padding: 60px 0;
    }
  }

  /* Contact Section */
  .contacto-section {
    padding: 100px 0;
    position: relative;
    background: radial-gradient(circle at center, #2a2a2a 0%, #111 100%);
  }

  .contacto-glass {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 60px;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
  }

  .contacto-content .section-title {
    margin-bottom: 10px;
  }

  .contacto-content .section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 50px;
  }

  .contacto-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    justify-content: center;
  }

  .contacto-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    text-decoration: none;
    transition: all 0.4s ease;
  }

  .contacto-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-gold);
  }

  .contacto-item .icon-box {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(200, 167, 90, 0.1);
    color: var(--accent-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    transition: all 0.4s ease;
  }

  .contacto-item:hover .icon-box {
    background: var(--accent-gold);
    color: #000;
    box-shadow: 0 0 20px rgba(200, 167, 90, 0.3);
  }

  .contacto-item h3 {
    color: var(--text-light);
    font-size: 1.1rem;
    margin: 0;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
  }

  .contacto-item p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.95rem;
  }

  @media (max-width: 768px) {
    .contacto-glass {
      padding: 40px 20px;
    }
  }

  /* Site Footer */
  .site-footer {
    background-color: #111;
    color: var(--text-light);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }

  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    margin-bottom: 40px;
  }

  .footer-brand {
    display: flex;
    flex-direction: column;
    gap: 15px;
  }

  .footer-logo {
    width: 140px;
    opacity: 0.9;
  }

  .footer-tagline {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin: 0;
  }

  .footer-info {
    display: flex;
    gap: 60px;
  }

  .footer-contact p {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 300;
  }

  .footer-social {
    display: flex;
    flex-direction: row;
    gap: 25px;
  }

  .social-link {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: color 0.3s ease;
  }

  .social-link:hover {
    color: var(--accent-gold);
  }

  .footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
  }

  .footer-credit {
    margin: 0;
  }

  /* Responsive Footer */
  @media (max-width: 1024px) {
    .footer-content {
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 40px;
    }

    .footer-info {
      gap: 60px;
    }
  }

  @media (max-width: 768px) {
    .footer-info {
      flex-direction: column;
      gap: 40px;
    }

    .footer-bottom {
      flex-direction: column;
      gap: 20px;
      text-align: center;
    }
  }

  /* Accessibility helpers */
  .sr-only {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  /* Menu Button */
  .e-menu-btn {
    position: fixed;
    top: 40px;
    right: 40px;
    z-index: 1001;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 12px;
    font-weight: 400;
  }

  .e-menu-btn__icon {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .e-menu-btn__line {
    display: block;
    width: 24px;
    height: 1px;
    background-color: var(--text-light);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .e-menu-btn--open .e-menu-btn__line:first-child {
    transform: translateY(3.5px) rotate(45deg);
  }

  .e-menu-btn--open .e-menu-btn__line:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  .e-menu-btn__label {
    transition: opacity 0.3s ease;
  }

  .e-menu-btn--open .e-menu-btn__label {
    opacity: 0.5;
  }

  /* Main Menu Overlay */
  .b-main-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--menu-bg);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 80px 10%;
    transform: translateY(-100%);
    transition: transform 0.6s cubic-bezier(0.77, 0, 0.175, 1);
    overflow-y: auto;
  }

  .b-main-menu--is-active {
    transform: translateY(0);
  }

  .b-main-menu__content {
    width: 100%;
    max-width: var(--maxw);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 60px;
    align-items: end;
  }

  .b-main-menu__nav {
    padding-left: 40px;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
  }

  .b-main-menu__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .b-main-menu__link {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 300;
    text-decoration: none;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 4px;
    transition: color 0.3s ease, padding-left 0.3s ease;
    display: inline-block;
  }

  .b-main-menu__link:hover {
    color: var(--text-light);
    padding-left: 15px;
  }

  .b-main-menu__footer {
    display: flex;
    flex-direction: column;
    gap: 30px;
    color: var(--text-muted);
    font-size: 14px;
    letter-spacing: 2px;
    text-transform: uppercase;
  }

  .b-main-menu__contact p {
    margin: 5px 0;
  }

  .b-main-menu__social {
    display: flex;
    gap: 20px;
  }

  .b-main-menu__social a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .b-main-menu__social a:hover {
    color: var(--accent-gold);
  }

  /* Responsive tweaks */
  @media (max-width: 1200px) {
    .presentacion-container {
      gap: 60px;
    }
  }

  @media (max-width: 1024px) {
    .presentacion-container {
      grid-template-columns: 1fr;
      gap: 60px;
      text-align: center;
    }

    .presentacion-texto {
      align-items: center;
    }

    .presentacion-divider {
      margin: 0 auto;
    }

    .presentacion-pic:nth-child(2) {
      margin-top: 0;
    }

    .presentacion-imagen {
      max-width: 800px;
      margin: 0 auto;
    }

    .b-main-menu__content {
      grid-template-columns: 1fr;
      gap: 40px;
      align-items: center;
      text-align: center;
    }

    .b-main-menu__nav {
      padding-left: 0;
      border-left: none;
    }

    .b-main-menu__footer {
      align-items: center;
    }

    .hero__content {
      gap: 32px;
    }

    .hero__divider {
      height: 56px;
    }
  }

  @media (max-width: 768px) {
    .proyectos-grid {
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .proyectos-destacados,
    .servicios-destacados {
      padding: 80px 0;
    }

    .presentacion {
      padding: 100px 0;
    }

    .hero__scroll {
      right: 20px;
      bottom: 20px;
    }

    .e-menu-btn {
      top: 25px;
      right: 25px;
    }

    .logo-bprincipal {
      width: 120px;
    }

    .b-main-menu__content {
      grid-template-columns: 1fr;
      gap: 40px;
    }

    .b-main-menu__nav {
      padding-left: 20px;
    }
  }

  @media (max-width: 640px) {
    .brand {
      top: 16px;
      left: 16px;
    }

    .hero__signature {
      bottom: 20px;
      left: 16px;
    }

    .hero__divider {
      height: 36px;
    }
  }

  @media (max-width: 480px) {

    .proyectos-container,
    .presentacion-container {
      padding: 0 20px;
    }

    .presentacion-imagen {
      grid-template-columns: 1fr;
      gap: 20px;
    }

    .b-main-menu__link {
      font-size: 1.8rem;
      letter-spacing: 2px;
    }

    .hero__signature {
      left: 20px;
      bottom: 80px;
      /* Evitar solapamiento con scroll en pantallas muy pequeñas */
    }
  }