:root {
      --blue-950: #0f2f4d;
      --blue-900: #12385a;
      --blue-850: #153f66;
      --blue-800: #184a77;
      --blue-700: #1f6fb4;
      --blue-600: #2c8fe5;
      --blue-100: #dcecf8;
      --gray-900: #17202a;
      --gray-700: #56616b;
      --gray-500: #9ca8b4;
      --gray-300: #c6ccd3;
      --gray-200: #d8dde3;
      --gray-100: #f3f6f9;
      --white: #ffffff;
      --panel: rgba(18, 56, 90, 0.78);
      --panel-strong: rgba(15, 47, 77, 0.94);
      --line: rgba(198, 204, 211, 0.28);
      --text-soft: rgba(255, 255, 255, 0.74);
      --shadow: 0 22px 60px rgba(4, 18, 32, 0.28);
      --radius: 8px;
      --container: 1120px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 92px;
    }

    body {
      margin: 0;
      color: var(--white);
      font-family: Arial, Helvetica, sans-serif;
      line-height: 1.6;
      background-image:
        linear-gradient(135deg, rgba(21, 63, 102, 0.86), rgba(24, 74, 119, 0.78) 52%, rgba(21, 63, 102, 0.86)),
        url("../img/bhc-wallpaper-site.jpg");
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
    }

    body.menu-open {
      overflow: hidden;
    }

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

    img,
    svg {
      max-width: 100%;
      display: block;
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .skip-link {
      position: fixed;
      top: -80px;
      left: 16px;
      z-index: 100;
      padding: 10px 14px;
      color: var(--white);
      background: var(--blue-800);
      border-radius: var(--radius);
      transition: top 0.2s ease;
    }

    .skip-link:focus {
      top: 16px;
    }

    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 50;
      background: rgba(15, 47, 77, 0.92);
      border-bottom: 1px solid rgba(120, 143, 161, 0.42);
      box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(12px);
    }

    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--white);
      font-size: 1.12rem;
      font-weight: 700;
      white-space: nowrap;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      object-fit: contain;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 30px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      margin: 0;
      padding: 0;
      list-style: none;
      color: var(--text-soft);
      font-size: 0.95rem;
      font-weight: 600;
    }

    .nav-links a {
      padding: 8px 0;
    }

    .nav-links a:hover,
    .nav-links a:focus {
      color: var(--white);
    }

    .menu-button {
      width: 42px;
      height: 42px;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 0;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: rgba(255, 255, 255, 0.08);
      cursor: pointer;
    }

    .menu-lines,
    .menu-lines::before,
    .menu-lines::after {
      width: 18px;
      height: 2px;
      display: block;
      background: var(--white);
      border-radius: 999px;
      content: "";
      transition: transform 0.2s ease, opacity 0.2s ease;
    }

    .menu-lines::before {
      transform: translateY(-6px);
    }

    .menu-lines::after {
      transform: translateY(4px);
    }

    .menu-open .menu-lines {
      transform: rotate(45deg);
    }

    .menu-open .menu-lines::before {
      opacity: 0;
    }

    .menu-open .menu-lines::after {
      transform: translateY(-2px) rotate(-90deg);
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 12px 18px;
      border: 1px solid transparent;
      border-radius: var(--radius);
      font-weight: 700;
      line-height: 1.2;
      text-align: center;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .button:hover,
    .button:focus {
      transform: translateY(-1px);
    }

    .button-primary {
      color: var(--white);
      background: var(--blue-600);
      box-shadow: 0 12px 26px rgba(44, 143, 229, 0.24);
    }

    .button-primary:hover,
    .button-primary:focus {
      background: var(--blue-700);
    }

    .button-secondary {
      color: var(--white);
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--line);
    }

    .button-whatsapp {
      width: 100%;
      color: var(--white);
      background: #1f8f55;
      box-shadow: 0 12px 24px rgba(31, 143, 85, 0.24);
    }

    main {
      padding-top: 76px;
    }

    .section {
      padding: 84px 0;
    }

    .hero {
      min-height: calc(100vh - 76px);
      display: flex;
      align-items: center;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(300px, 440px);
      align-items: center;
      gap: 64px;
    }

    .eyebrow {
      margin: 0 0 14px;
      color: var(--gray-300);
      font-size: 0.78rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      max-width: 780px;
      margin-bottom: 22px;
      color: var(--white);
      font-size: clamp(2.35rem, 5vw, 4.6rem);
      line-height: 1.02;
      letter-spacing: 0;
    }

    h2 {
      margin-bottom: 18px;
      color: var(--white);
      font-size: clamp(1.85rem, 3vw, 2.7rem);
      line-height: 1.15;
      letter-spacing: 0;
    }

    h3 {
      margin-bottom: 10px;
      color: var(--white);
      font-size: 1.05rem;
      line-height: 1.3;
    }

    .hero-text {
      max-width: 650px;
      margin-bottom: 28px;
      color: var(--text-soft);
      font-size: 1.13rem;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .hero-visual {
      position: relative;
      min-height: 420px;
      padding: 26px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: rgba(15, 47, 77, 0.72);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .hero-visual::before {
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(198, 204, 211, 0.14) 1px, transparent 1px),
        linear-gradient(90deg, rgba(198, 204, 211, 0.14) 1px, transparent 1px);
      background-size: 34px 34px;
      content: "";
    }

    .server-stack,
    .cloud-card,
    .device-card,
    .signal-card {
      position: relative;
      z-index: 1;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: rgba(18, 56, 90, 0.88);
      box-shadow: 0 16px 34px rgba(4, 18, 32, 0.22);
    }

    .server-stack {
      width: 72%;
      margin-top: 24px;
      padding: 18px;
    }

    .server-row {
      height: 54px;
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
      padding: 0 14px;
      border: 1px solid rgba(198, 204, 211, 0.18);
      border-radius: 8px;
      background: rgba(255, 255, 255, 0.08);
    }

    .server-row:last-child {
      margin-bottom: 0;
    }

    .status-dot {
      width: 10px;
      height: 10px;
      background: #2f9e44;
      border-radius: 50%;
      box-shadow: 0 0 0 5px rgba(47, 158, 68, 0.12);
    }

    .server-line {
      height: 8px;
      flex: 1;
      background: linear-gradient(90deg, var(--blue-600), var(--gray-700));
      border-radius: 999px;
    }

    .cloud-card {
      width: 190px;
      margin: -10px 0 0 auto;
      padding: 18px;
    }

    .cloud-shape {
      width: 92px;
      height: 42px;
      margin: 0 auto 14px;
      background: rgba(44, 143, 229, 0.16);
      border: 2px solid rgba(44, 143, 229, 0.32);
      border-radius: 999px;
    }

    .cloud-shape::before,
    .cloud-shape::after {
      position: absolute;
      background: rgba(44, 143, 229, 0.16);
      border: 2px solid rgba(44, 143, 229, 0.32);
      border-bottom: 0;
      content: "";
    }

    .cloud-shape::before {
      width: 34px;
      height: 34px;
      margin-top: -18px;
      margin-left: 16px;
      border-radius: 50% 50% 0 0;
    }

    .cloud-shape::after {
      width: 42px;
      height: 42px;
      margin-top: -24px;
      margin-left: 40px;
      border-radius: 50% 50% 0 0;
    }

    .mini-lines span {
      height: 7px;
      display: block;
      margin-top: 8px;
      background: rgba(255, 255, 255, 0.32);
      border-radius: 999px;
    }

    .mini-lines span:nth-child(2) {
      width: 72%;
    }

    .device-card {
      width: 220px;
      margin-top: 22px;
      padding: 14px;
    }

    .device-screen {
      height: 92px;
      padding: 14px;
      background: linear-gradient(135deg, var(--blue-950), var(--blue-700));
      border-radius: 8px;
    }

    .device-screen span {
      height: 8px;
      display: block;
      margin-bottom: 9px;
      background: rgba(255, 255, 255, 0.68);
      border-radius: 999px;
    }

    .device-screen span:nth-child(2) {
      width: 68%;
    }

    .signal-card {
      position: absolute;
      right: 28px;
      bottom: 32px;
      width: 146px;
      padding: 14px;
    }

    .signal-bars {
      display: flex;
      align-items: end;
      gap: 8px;
      height: 62px;
    }

    .signal-bars span {
      width: 22%;
      background: var(--blue-600);
      border-radius: 6px 6px 2px 2px;
    }

    .signal-bars span:nth-child(1) { height: 32%; }
    .signal-bars span:nth-child(2) { height: 52%; }
    .signal-bars span:nth-child(3) { height: 76%; }
    .signal-bars span:nth-child(4) { height: 100%; }

    .section-muted {
      background: transparent;
    }

    .content-grid {
      display: grid;
      grid-template-columns: 0.86fr 1.14fr;
      gap: 58px;
      align-items: start;
    }

    .section-copy {
      color: var(--text-soft);
      font-size: 1.02rem;
    }

    .section-copy > p {
      color: var(--white);
      text-shadow:
        -1px -1px 0 rgba(0, 0, 0, 0.34),
        1px -1px 0 rgba(0, 0, 0, 0.34),
        -1px 1px 0 rgba(0, 0, 0, 0.34),
        1px 1px 0 rgba(0, 0, 0, 0.34);
    }

    .section-copy p:last-child {
      margin-bottom: 0;
    }

    .trust-panel {
      padding: 28px;
      border-left: 4px solid var(--gray-700);
      border-radius: var(--radius);
      background: var(--panel-strong);
      box-shadow: 0 12px 30px rgba(4, 18, 32, 0.18);
    }

    .trust-panel strong {
      display: block;
      margin-bottom: 8px;
      color: var(--white);
      font-size: 1.18rem;
    }

    .cards {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 18px;
      margin-top: 36px;
    }

    .card {
      min-height: 174px;
      padding: 22px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel);
      box-shadow: 0 10px 26px rgba(4, 18, 32, 0.16);
    }

    .card-number {
      width: 34px;
      height: 34px;
      display: inline-grid;
      place-items: center;
      margin-bottom: 18px;
      color: var(--white);
      font-size: 0.78rem;
      font-weight: 800;
      background: rgba(44, 143, 229, 0.24);
      border-radius: 8px;
    }

    .card p {
      margin-bottom: 0;
      color: var(--text-soft);
      font-size: 0.95rem;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 48px;
      align-items: stretch;
    }

    .contact-info {
      height: 100%;
      padding: 30px;
      color: var(--text-soft);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel-strong);
      box-shadow: 0 10px 30px rgba(4, 18, 32, 0.16);
    }

    .contact-info p {
      margin-bottom: 18px;
    }

    .contact-info p:last-of-type {
      margin-bottom: 24px;
    }

    .contact-card {
      height: 100%;
      padding: 30px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel-strong);
      box-shadow: var(--shadow);
    }

    .contact-card h3 {
      margin-bottom: 22px;
      font-size: 1.25rem;
    }

    .contact-list {
      display: grid;
      gap: 14px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .contact-list li {
      display: grid;
      gap: 4px;
      padding: 16px;
      border: 1px solid rgba(198, 204, 211, 0.18);
      border-radius: var(--radius);
      background: rgba(255, 255, 255, 0.07);
    }

    .contact-list span {
      color: var(--gray-300);
      font-size: 0.78rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .contact-list a,
    .contact-list strong {
      color: var(--white);
      font-size: 1.03rem;
      font-weight: 700;
      overflow-wrap: anywhere;
    }

    .contact-list a:hover,
    .contact-list a:focus {
      color: var(--blue-100);
    }

    .site-footer {
      padding: 26px 0;
      color: rgba(255, 255, 255, 0.82);
      background: var(--blue-950);
      border-top: 1px solid rgba(255, 255, 255, 0.14);
    }

    .footer-content {
      max-width: 720px;
      text-align: center;
      font-size: 0.9rem;
    }

    .footer-content p {
      margin: 0;
    }

    @media (max-width: 980px) {
      .hero-grid,
      .content-grid,
      .contact-grid {
        grid-template-columns: 1fr;
      }

      .hero {
        min-height: auto;
        padding: 76px 0;
      }

      .hero-grid {
        gap: 42px;
      }

      .hero-visual {
        min-height: 380px;
      }

      .cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 760px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .menu-button {
        display: inline-flex;
      }

      .nav-menu {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        display: none;
        min-height: calc(100vh - 76px);
        padding: 24px 20px;
        flex-direction: column;
        align-items: stretch;
        gap: 18px;
        background: var(--blue-950);
        border-top: 1px solid var(--line);
      }

      .menu-open .nav-menu {
        display: flex;
      }

      .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
      }

      .nav-links a {
        display: block;
        padding: 13px 0;
        border-bottom: 1px solid var(--line);
      }

      .nav-menu .button {
        width: 100%;
      }

      .section {
        padding: 62px 0;
      }

      h1 {
        font-size: clamp(2.2rem, 12vw, 3.4rem);
      }

      .hero-text {
        font-size: 1.03rem;
      }

      .hero-actions {
        flex-direction: column;
      }

      .button {
        width: 100%;
      }

      .cards {
        grid-template-columns: 1fr;
      }

      .hero-visual {
        min-height: 330px;
        padding: 18px;
      }

      .server-stack {
        width: 84%;
      }

      .cloud-card {
        width: 160px;
      }

      .device-card {
        width: 190px;
      }

      .signal-card {
        right: 18px;
        bottom: 20px;
        width: 124px;
      }

      .contact-info,
      .contact-card {
        padding: 22px;
      }
    }