:root {
      --bg: #0f172a;
      --surface: rgba(15, 23, 42, 0.82);
      --surface-soft: rgba(15, 23, 42, 0.72);
      --text: #f8fafc;
      --muted: #cbd5e1;
      --blue: #2563eb;
      --purple: #7c3aed;
      --gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
      --shadow: 0 26px 60px rgba(15, 23, 42, 0.24);
      --radius: 24px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: 'Poppins', sans-serif;
      background: linear-gradient(
          135deg,
          rgba(37, 99, 235, 0.1) 0%,
          rgba(15, 23, 42, 0) 25%,
          rgba(124, 58, 237, 0.08) 75%,
          rgba(124, 58, 237, 0.15) 100%
        ),
        #020617;
      background-size: 200% 200%;
      color: var(--text);
      overflow-x: hidden;
      position: relative;
      animation: gradient-animation 25s ease infinite;
    }
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      pointer-events: none;
      background: radial-gradient(
        600px circle at var(--cursor-x, -1000px) var(--cursor-y, -1000px),
        rgba(37, 99, 235, 0.12),
        transparent 40%
      );
      transition: background 0.1s ease-out;
    }
    button, a { font: inherit; }
    img { max-width: 100%; display: block; }
    .container { width: min(1180px, calc(100% - 3rem)); margin: 0 auto; }
    header {
      position: fixed;
      width: 100%;
      top: 0;
      left: 0;
      z-index: 30;
      padding: 1.1rem 0;
      transition: transform .3s ease, background .4s ease, box-shadow .4s ease;
      background: transparent;
    }
    header.solid {
      background: rgba(15, 23, 42, 0.96);
      box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
      backdrop-filter: blur(14px);
    }
    .topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
    .brand { display: flex; align-items: center; text-decoration: none; }
    .brand img {
      height: 32px;
      width: auto;
      transition: opacity 0.25s ease;
    }
    .brand:hover img { opacity: 0.9; }

    nav { display: flex; align-items: center; gap: 2rem; flex-wrap: wrap; }
    nav a {
      position: relative;
      color: var(--muted);
      text-decoration: none;
      font-size: .95rem;
      transition: color .24s ease;
      padding-bottom: 4px;
    }
    nav a:hover { color: var(--text); }
    nav a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--gradient);
      transform: scaleX(0);
      transform-origin: right;
      transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
    }
    nav a:hover::after {
      transform: scaleX(1);
      transform-origin: left;
    }
    .cta-header { padding: .9rem 1.65rem; border-radius: 999px; background: var(--gradient); color: #fff; text-decoration: none; display: inline-flex; align-items: center; gap: .6rem; box-shadow: 0 22px 52px rgba(37, 99, 235, 0.2); transition: transform .25s ease, box-shadow .25s ease, opacity .25s ease; }
    .cta-header:hover { transform: translateY(-1px); box-shadow: 0 28px 65px rgba(37, 99, 235, 0.26); opacity: .98; }
    .hero { min-height: 100vh; position: relative; display: grid; align-items: center; }
    .hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,23,42,.12), rgba(15,23,42,.92) 72%); pointer-events: none; }
    .hero-slider { position: relative; overflow: hidden; border-radius: 36px; min-height: 92vh; box-shadow: 0 28px 80px rgba(0,0,0,.28); }
    .slide { position: absolute; inset: 0; display: grid; place-items: center; padding: 2rem; opacity: 0; transform: scale(.98); transition: opacity .8s ease, transform .8s ease; background-size: cover; background-position: center; }
    .slide.active { opacity: 1; transform: scale(1); }
    .slide::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,23,42,.18), rgba(15,23,42,.85)); }
    .slide-content { position: relative; z-index: 2; max-width: 720px; text-align: left; animation: fadeUp .9s ease forwards; }
    .slide h1 { font-family: 'Playfair Display', serif; font-size: clamp(3rem, 3.8vw, 5.6rem); line-height: 1.02; margin: 0 0 1rem; }
    .slide p { color: #cbd5e1; font-size: 1.08rem; max-width: 42rem; margin-bottom: 1.8rem; }
    .slide a { display: inline-flex; align-items: center; justify-content: center; padding: 1rem 1.9rem; border-radius: 999px; background: var(--gradient); color: #fff; text-decoration: none; font-weight: 600; box-shadow: 0 20px 30px rgba(37, 99, 235, .18); }
    .slide-meta { display: grid; gap: 1rem; margin-top: 2rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .slide-meta .tag { display: inline-flex; align-items: center; gap: .55rem; color: #a5b4fc; font-size: .95rem; }
    .slide-meta span { font-weight: 600; color: #fff; }
    .slide-overlay { position: absolute; inset: 0; background-size: cover; background-position: center; filter: saturate(.9) contrast(1.02); }
    .hero-controls { position: absolute; bottom: 2rem; left: 2rem; right: 2rem; display: flex; align-items: center; justify-content: space-between; z-index: 3; gap: 1rem; padding: 1rem; border-radius: 32px; background: rgba(8, 15, 34, .72); backdrop-filter: blur(18px); border: 1px solid rgba(255,255,255,.08); }
    .hero-dots { display: flex; gap: .7rem; }
    .hero-dot { width: 12px; height: 12px; background: rgba(255,255,255,.18); border-radius: 999px; border: 1px solid rgba(255,255,255,.2); cursor: pointer; transition: transform .3s ease, background .3s ease; }
    .hero-dot.active { background: #fff; transform: scale(1.3); }
    .hero-nav { display: flex; gap: .9rem; }
    .hero-nav button { width: 52px; height: 52px; border-radius: 50%; border: 1px solid rgba(255,255,255,.18); background: rgba(15, 23, 42, .48); color: #fff; cursor: pointer; transition: transform .25s ease, background .25s ease; }
    .hero-nav button:hover { transform: translateY(-1px); background: rgba(37, 99, 235, .32); }
    section { position: relative; padding: 100px 0; }
    .section-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
    .section-head h2 { font-family: 'Playfair Display', serif; font-size: clamp(2.3rem, 2.6vw, 3.6rem); margin: 0; letter-spacing: -.03em; }
    .section-head p { margin: 0; color: #94a3b8; max-width: 620px; }
    .section-head h2::after { content: ''; display: block; width: 72px; height: 4px; margin-top: 1rem; border-radius: 999px; background: var(--gradient); }
    .grid-3 { display: grid; gap: 1.6rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .grid-4 { display: grid; gap: 1.6rem; grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .card { background: rgba(15, 23, 42, 0.82); border: 1px solid rgba(148, 163, 184, .08); border-radius: 24px; box-shadow: var(--shadow); overflow: hidden; position: relative; transition: transform .35s ease, border-color .35s ease, background .35s ease, box-shadow .35s ease; }
    .card:hover { transform: translateY(-10px); border-color: rgba(37, 99, 235, .3); background: rgba(15, 23, 42, 0.96); box-shadow: 0 30px 70px rgba(15, 23, 42, .24); }
    .service-card { padding: 2rem; display: grid; gap: 1.4rem; min-height: 320px; position: relative; overflow: hidden; }
    .service-card::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at top right, rgba(124,58,237,.18), transparent 38%); opacity: 0; transition: opacity .4s ease; }
    .service-card:hover::before { opacity: 1; }
    .service-card .icon { width: 64px; height: 64px; display: grid; place-items: center; border-radius: 18px; background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%); color: #fff; font-size: 1.5rem; box-shadow: 0 20px 35px rgba(37,99,235,.18); }
    .service-card h3 { margin: 0; font-size: 1.45rem; }
    .service-card p { margin: 0; line-height: 1.85; color: #cbd5e1; }
    .service-card .tag { display: inline-flex; align-items: center; gap: .45rem; color: #8b5cf6; font-size: .92rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
    .portfolio-filter { display: flex; flex-wrap: wrap; gap: .85rem; margin-bottom: 2rem; }
    .portfolio-filter button { padding: .9rem 1.4rem; border-radius: 999px; border: 1px solid rgba(148, 163, 184, .18); background: rgba(15,23,42,.65); color: #cbd5e1; cursor: pointer; transition: all .25s ease; }
    .portfolio-filter button.active, .portfolio-filter button:hover { background: var(--gradient); color: #fff; border-color: transparent; }
    .project-card { position: relative; overflow: hidden; border-radius: 28px; cursor: pointer; background: #020617; }
    .project-card img { width: 100%; height: 320px; object-fit: cover; transition: transform .6s ease; }
    .project-card:hover img { transform: scale(1.08); }
    .project-card .project-meta { position: absolute; bottom: 0; left: 0; right: 0; padding: 1.7rem 1.5rem; background: linear-gradient(180deg, transparent, rgba(15,23,42,.98)); color: #fff; backdrop-filter: blur(10px); }
    .project-card .project-meta span { display: inline-block; font-size: .82rem; color: #a5b4fc; margin-bottom: .5rem; text-transform: uppercase; letter-spacing: .08em; }
    .project-card .project-meta h3 { margin: 0; font-size: 1.3rem; }
    .timeline { display: grid; gap: 1.5rem; grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .timeline-card { background: rgba(255,255,255,.04); border: 1px solid rgba(148,163,184,.08); padding: 1.6rem; border-radius: 24px; backdrop-filter: blur(10px); text-align: center; transition: transform .3s ease, border-color .3s ease; }
    .timeline-card:hover { transform: translateY(-8px); border-color: rgba(37,99,235,.26); }
    .timeline-card .step { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; margin: 0 auto 1rem; background: linear-gradient(135deg, rgba(37,99,235,.14), rgba(124,58,237,.16)); color: #fff; font-weight: 700; font-size: 1.1rem; }
    .timeline-card h3 { margin: .75rem 0 1rem; font-size: 1.1rem; }
    .timeline-card p { margin: 0; color: #cbd5e1; line-height: 1.75; font-size: .95rem; }
    .blog-grid { display: grid; gap: 1.6rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .blog-card { background: rgba(15,23,42,.82); border-radius: 28px; overflow: hidden; display: flex; flex-direction: column; min-height: 100%; transition: transform .35s ease, box-shadow .35s ease; }
    .blog-card:hover { transform: translateY(-8px); box-shadow: 0 28px 70px rgba(15,23,42,.16); }
    .blog-card img { height: 230px; width: 100%; object-fit: cover; }
    .blog-card-content { padding: 1.7rem; display: grid; gap: 1rem; flex:1; }
    .blog-card .meta { display: flex; gap: .9rem; flex-wrap: wrap; color: #94a3b8; font-size: .9rem; }
    .blog-card h3 { margin: 0; font-size: 1.2rem; }
    .blog-card p { margin: 0; color: #cbd5e1; line-height: 1.8; }
    .blog-card a { margin-top: auto; align-self: flex-start; color: var(--blue); text-decoration: none; font-weight: 600; }
    .stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.4rem; margin-top: 2rem; }
    .stat-card { padding: 2rem; border-radius: 28px; background: linear-gradient(180deg, rgba(15,23,42,.92), rgba(3,7,18,.92)); border: 1px solid rgba(148,163,184,.08); box-shadow: 0 24px 50px rgba(0,0,0,.12); }
    .stat-card h3 { margin: 0; font-size: 2.4rem; color: #fff; }
    .stat-card p { margin: .8rem 0 0; color: #94a3b8; font-size: .95rem; }
    .testimonials { position: relative; }
    .testimonial-slider { position: relative; overflow: hidden; border-radius: 28px; }
    .testimonial-slides-wrapper {
      display: flex;
      transition: transform 0.5s ease-in-out;
    }
    .testimonial-card {
      flex: 0 0 100%;
      box-sizing: border-box;
      background: rgba(15, 23, 42, 0.9);
      padding: 2rem;
      border: 1px solid rgba(148, 163, 184, .08);
      box-shadow: var(--shadow);
      display: grid;
      gap: 1.3rem;
    }
    .testimonial-top { display: flex; gap: 1rem; align-items: center; }
    .testimonial-photo { width: 64px; height: 64px; border-radius: 50%; overflow: hidden; border: 1px solid rgba(255,255,255,.12); }
    .testimonial-photo img { width: 100%; height: 100%; object-fit: cover; }
    .testimonial-author h4 { margin: 0; font-size: 1.1rem; }
    .testimonial-author span { color: #94a3b8; font-size: .92rem; }
    .stars { display: inline-flex; gap: .2rem; color: #ffb703; }
    .testimonial-card p { color: #cbd5e1; line-height: 1.8; }
    .testimonial-navigation { display: flex; align-items: center; justify-content: center; gap: 1.5rem; margin-top: 2rem; }
    .testimonial-navigation button { padding: .8rem 1.8rem; border-radius: 18px; border: 1px solid rgba(255,255,255,.12); background: rgba(15,23,42,.6); color: #fff; cursor: pointer; transition: background .25s ease, transform .25s ease; }
    .testimonial-navigation button:hover { background: rgba(37, 99, 235, .18); transform: translateY(-1px); }
    .testimonial-dots { display: flex; gap: .8rem; }
    .testimonial-dot {
      width: 12px;
      height: 12px;
      background: rgba(255,255,255,.25);
      border-radius: 50%;
      border: none;
      padding: 0;
      cursor: pointer;
      transition: background .3s ease, transform .3s ease;
    }
    .testimonial-dot.active { background: #fff; transform: scale(1.2); }
    .contact-grid { display: grid; gap: 1.6rem; grid-template-columns: 1.2fr minmax(320px, 1fr); }
    .contact-panel { display: grid; gap: 1.6rem; }
    .contact-panel .info-box { display: grid; gap: .75rem; padding: 1.6rem 1.8rem; border-radius: 24px; background: rgba(255,255,255,.03); border: 1px solid rgba(148,163,184,.08); }
    .contact-panel .info-box h3 { margin: 0; font-size: 1rem; color: #fff; }
    .contact-panel .info-box p { margin: 0; color: #cbd5e1; line-height: 1.75; }
    .contact-panel .info-line { display: grid; gap: .5rem; }
    .contact-panel .info-line strong { display: block; color: #fff; }
    .contact-panel .info-line span { color: #94a3b8; }
    .contact-form { display: grid; gap: 1rem; }
    .whatsapp-panel { padding: 1.6rem; border-radius: 28px; background: linear-gradient(180deg, rgba(37,99,235,.18), rgba(124,58,237,.12)); border: 1px solid rgba(255,255,255,.12); box-shadow: 0 28px 80px rgba(37,99,235,.12); }
    .whatsapp-panel .info-box { position: relative; overflow: hidden; }
    .whatsapp-info-box {
      background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(124, 58, 237, .16));
      border: 1px solid rgba(37, 99, 235, .18);
    }
    .whatsapp-bg-icon {
      position: absolute;
      right: -10px;
      bottom: -10px;
      color: rgba(255, 255, 255, 0.04);
      pointer-events: none;
    }
    .whatsapp-panel h3 { margin: 0 0 .75rem; font-size: 1.45rem; color: #fff; }
    .whatsapp-panel p { margin: 0 0 1.3rem; color: #dbeafe; line-height: 1.75; }
    .whatsapp-panel .cta-header { width: 100%; justify-content: center; border: none; cursor: pointer; padding: 1rem 1.5rem; gap: .8rem; }
    .map-wrapper { border-radius: 28px; overflow: hidden; border: 1px solid rgba(148,163,184,.12); box-shadow: 0 24px 60px rgba(0,0,0,.16); }
    .footer-modal .modal-card { transform: translateY(20px); transition: transform .3s ease; }
    .footer-modal.active .modal-card { transform: translateY(0); }
    iframe { width: 100%; min-height: 420px; border: 0; }
    .lightbox {
      position: fixed;
      inset: 0;
      background: rgba(8, 15, 34, 0.92);
      display: grid;
      place-items: center;
      padding: 2rem;
      z-index: 80;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.4s ease;
    }
    .lightbox.active {
      opacity: 1;
      pointer-events: auto;
    }
    .lightbox-content {
      position: relative;
      max-width: 1100px;
      width: 100%;
      border-radius: 30px;
      overflow: hidden;
      box-shadow: 0 40px 90px rgba(0, 0, 0, 0.42);
      background: rgba(6, 10, 24, 0.96);
      transform: scale(0.95);
      transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
    }
    .lightbox.active .lightbox-content {
      transform: scale(1);
    }
    .lightbox-close {
      position: absolute;
      top: 18px;
      right: 18px;
      width: 50px;
      height: 50px;
      border: none;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.08);
      color: #fff;
      font-size: 1.5rem;
      cursor: pointer;
      z-index: 10;
      transition: background 0.25s ease, transform 0.25s ease;
    }
    .lightbox-close:hover {
      background: rgba(255, 255, 255, 0.12);
      transform: scale(1.05);
    }
    .lightbox-content img {
      width: 100%;
      height: auto;
      display: block;
      max-height: 70vh;
      object-fit: cover;
    }
    .lightbox-meta {
      padding: 1.6rem 2rem;
      color: #e2e8f0;
    }
    .lightbox-meta h3 {
      margin: 0 0 0.75rem;
      font-size: 1.8rem;
      font-family: 'Playfair Display', serif;
    }
    .lightbox-meta p {
      margin: 0;
      color: #94a3b8;
    }

    .whatsapp-panel .form-group {
      display: grid;
      gap: .5rem;
      margin-bottom: 1.2rem;
    }
    .whatsapp-panel .form-label {
      font-weight: 500;
      font-size: .9rem;
      color: var(--muted);
      padding-left: .25rem;
    }
    .whatsapp-panel .form-field {
      width: 100%;
      padding: .9rem 1rem;
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(148, 163, 184, .2);
      border-radius: 12px;
      color: var(--text);
      font-size: .95rem;
      transition: border-color .25s ease, box-shadow .25s ease;
    }
    .whatsapp-panel .form-field::placeholder { color: #64748b; }
    .whatsapp-panel select.form-field {
      appearance: none;
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
      background-position: right 1rem center;
      background-repeat: no-repeat;
      background-size: 1.2em;
    }
    .whatsapp-panel .form-field:focus {
      outline: none;
      border-color: rgba(37, 99, 235, 0.6);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
    }
    footer { padding: 3.5rem 0 2rem; background: rgba(3, 7, 18, 0.96); border-top: 1px solid rgba(148,163,184,.06); }
    .footer-grid { display: grid; gap: 1.8rem; grid-template-columns: 1.7fr 1fr 1fr 1fr; }
    .footer-brand { display: grid; gap: 1rem; }
    .footer-brand p { color: #94a3b8; max-width: 280px; }
    .footer-links { display: grid; gap: .85rem; }
    .footer-links a { color: #cbd5e1; text-decoration: none; font-size: .95rem; }
    .newsletter { display: grid; gap: .9rem; }
    .newsletter input { width: 100%; padding: 1rem 1.1rem; background: rgba(255,255,255,.04); border: 1px solid rgba(148,163,184,.16); border-radius: 18px; color:#f8fafc; }
    .newsletter button { width: 100%; padding: 1rem; border-radius: 18px; border:none; background: var(--blue); color:#fff; font-weight: 600; }
    .footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 2rem; flex-wrap: wrap; color: #94a3b8; font-size: .92rem; }
    .footer-modal { position: fixed; inset: 0; background: rgba(15,23,42,.88); display: none; align-items: center; justify-content: center; z-index: 60; padding: 2rem; }
    .footer-modal.active { display: flex; }
    .modal-card { width: min(900px, 100%); max-height: 88vh; overflow-y: auto; background: rgba(15,23,42,.98); border-radius: 32px; border: 1px solid rgba(148,163,184,.14); box-shadow: 0 40px 80px rgba(0,0,0,.3); padding: 2.5rem; position: relative; }
    .modal-card h3 { margin-top: 0; font-family: 'Playfair Display', serif; font-size: 2rem; }
    .modal-card p { color: #cbd5e1; line-height: 1.9; margin-bottom: 1rem; }
    .modal-card .modal-close { position: absolute; top: 1.3rem; right: 1.3rem; width: 48px; height: 48px; border-radius: 50%; border: none; background: rgba(255,255,255,.08); color: #fff; cursor: pointer; font-size: 1.2rem; }
    .floating-whatsapp { position: fixed; right: 1.5rem; bottom: 1.5rem; width: 64px; height: 64px; border-radius: 50%; background: #25d366; display: grid; place-items: center; box-shadow: 0 24px 60px rgba(37, 99, 235, .25); animation: pulse 2.5s ease infinite; z-index: 50; cursor: pointer; }
    .floating-whatsapp img { width: 32px; height: 32px; filter: drop-shadow(0 0 1px rgba(0,0,0,.4)); }
    .scroll-reveal { opacity: 0; transform: translateY(32px); transition: opacity .75s ease, transform .75s ease; }
    .scroll-reveal.visible { opacity: 1; transform: none; }
    @media (max-width: 1100px) {
      .grid-3 { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .timeline { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .blog-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .stats-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    }
    @media (max-width: 860px) {
      .topbar { flex-direction: column; align-items: flex-start; }
      nav { gap: 1rem; }
      .section-head { flex-direction: column; align-items: flex-start; }
      .hero-controls { flex-direction: column; align-items: stretch; }
      .hero-nav { justify-content: flex-start; }
      .grid-3, .timeline, .blog-grid, .stats-grid { grid-template-columns: 1fr; }
      .contact-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 620px) {
      header { padding: .9rem 0; }
      .hero { min-height: 92vh; }
      .slide h1 { font-size: 2.8rem; }
      .slide p { font-size: 1rem; }
      .hero-controls { left: 1rem; right: 1rem; bottom: 1rem; }
      .service-card { padding: 1.6rem; }
      .modal-card { padding: 1.6rem; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; align-items: stretch; }
    }
    @keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); }}
    @keyframes gradient-animation {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }
    @keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.08); } }

    /* Classe para acessibilidade (Screen Reader only) */
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border-width: 0;
    }