:root{
    --orange:#FFA500;
    --orange-dark:#FF8C00;
    --black:#111111;
    --gray-900:#1F2937;
    --gray-600:#6B7280;
    --gray-100:#F9FAFB;
    --whatsapp:#25D366;
    --whatsapp-dark:#20BA5A;
    --radius:12px;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  section[id]{scroll-margin-top:78px;}
  @media (min-width:640px){ section[id]{scroll-margin-top:88px;} }
  body{
    font-family:'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    color:var(--gray-900);
    background:#fff;
    line-height:1.5;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  ul{list-style:none;}
  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 1.5rem;
  }
  @media (max-width:380px){ .container{padding:0 1.1rem;} }

  /* Header */
  header{
    position:fixed;top:0;left:0;right:0;
    background:rgba(255,255,255,.97);
    backdrop-filter:blur(6px);
    box-shadow:0 1px 6px rgba(0,0,0,.06);
    z-index:100;
  }
  nav{
    position:relative;
    display:flex;align-items:center;justify-content:space-between;
    padding:.8rem 0;
  }
  .logo{display:flex;align-items:center;gap:.5rem;min-width:0;}
  .logo-img{
    width:40px;height:40px;border-radius:9px;
    object-fit:cover;flex-shrink:0;
  }
  .logo-text{
    font-size:1rem;font-weight:700;color:var(--black);
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .logo-text span{color:var(--orange);}

  .nav-panel{display:flex;align-items:center;gap:2rem;}
  .nav-links{display:flex;gap:2rem;}
  .nav-links button{
    background:none;border:none;font:inherit;font-weight:500;
    color:var(--gray-900);cursor:pointer;transition:color .15s;
  }
  .nav-links button:hover{color:var(--orange);}

  .nav-toggle{
    display:none;
    position:relative;
    width:26px;height:19px;
    background:none;border:none;cursor:pointer;padding:0;
    flex-shrink:0;
  }
  .nav-toggle span{
    position:absolute;left:0;width:100%;height:2px;background:var(--black);
    border-radius:2px;transition:transform .25s ease, opacity .2s ease, top .25s ease;
  }
  .nav-toggle span:nth-child(1){top:0;}
  .nav-toggle span:nth-child(2){top:8.5px;}
  .nav-toggle span:nth-child(3){top:17px;}
  .nav-toggle.open span:nth-child(1){top:8.5px;transform:rotate(45deg);}
  .nav-toggle.open span:nth-child(2){opacity:0;}
  .nav-toggle.open span:nth-child(3){top:8.5px;transform:rotate(-45deg);}

  @media (max-width:820px){
    .logo-text{font-size:.95rem;max-width:9.5rem;}
    .nav-toggle{display:block;}
    .nav-panel{
      position:absolute;top:100%;left:0;right:0;
      flex-direction:column;align-items:stretch;gap:0;
      background:#fff;
      border-radius:0 0 var(--radius) var(--radius);
      box-shadow:0 12px 24px rgba(0,0,0,.1);
      max-height:0;overflow:hidden;
      transition:max-height .3s ease;
    }
    .nav-panel.open{max-height:26rem;}
    .nav-links{flex-direction:column;gap:0;padding:.5rem 1.5rem 0;}
    .nav-links button{
      width:100%;text-align:left;padding:.9rem 0;
      font-size:1.05rem;border-bottom:1px solid #f0f0f0;
    }
    .nav-cta{display:block;margin:1.1rem 1.5rem 1.5rem;}
    .nav-cta .btn{width:100%;justify-content:center;}
  }
  @media (max-width:380px){
    .logo-text{max-width:7rem;}
  }

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
    border:none;border-radius:8px;
    font-weight:600;font-size:.95rem;
    padding:.65rem 1.3rem;
    cursor:pointer;transition:background .15s, transform .15s;
  }
  .btn-whatsapp{background:var(--whatsapp);color:#fff;}
  .btn-whatsapp:hover{background:var(--whatsapp-dark);}
  .btn-orange{background:var(--orange);color:#000;}
  .btn-orange:hover{background:var(--orange-dark);}
  .btn-outline{
    background:transparent;border:1.5px solid #fff;color:#fff;
  }
  .btn-outline:hover{background:rgba(255,255,255,.12);}
  .btn-lg{padding:.85rem 2rem;font-size:1rem;}

  /* Hero */
  .hero{
    padding:7rem 0 3.5rem;
    background:linear-gradient(135deg,#000,#1a1a1a,var(--orange));
    color:#fff;
  }
  @media (min-width:640px){ .hero{padding:8.5rem 0 5rem;} }
  .hero .container{
    display:grid;grid-template-columns:1fr;gap:2rem;
  }
  @media (min-width:860px){
    .hero .container{grid-template-columns:1fr 1fr;gap:2.5rem;align-items:center;}
  }
  .hero h1{
    display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;
    font-size:clamp(2rem, 8vw, 3.4rem);line-height:1.15;font-weight:700;
  }
  .hero-bulb{
    width:1em;height:1em;flex-shrink:0;
    transform:translateY(-.02em);
  }
  .hero h1 span{color:var(--orange);}
  .hero p{font-size:clamp(1rem, 3vw, 1.15rem);color:#e5e7eb;margin-top:1rem;max-width:34rem;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:.85rem;margin-top:1.5rem;}
  .hero-actions .btn{flex:1 1 auto;}
  @media (min-width:480px){ .hero-actions .btn{flex:0 1 auto;} }
  .hero-visual{
    border-radius:16px;overflow:hidden;
    box-shadow:0 20px 40px rgba(0,0,0,.3);
    aspect-ratio:4/3;
  }
  @media (min-width:640px){ .hero-visual{border-radius:20px;box-shadow:0 25px 50px rgba(0,0,0,.35);} }
  .hero-visual img{width:100%;height:100%;object-fit:cover;}

  section{padding:3.5rem 0;}
  @media (min-width:640px){ section{padding:5rem 0;} }
  .section-gray{background:var(--gray-100);}
  .section-head{text-align:center;max-width:40rem;margin:0 auto 2.5rem;}
  @media (min-width:640px){ .section-head{margin-bottom:3.5rem;} }
  .section-head h2{font-size:clamp(1.6rem, 5vw, 2.2rem);font-weight:700;color:var(--black);margin-bottom:.6rem;}
  .section-head p{font-size:clamp(1rem, 3vw, 1.15rem);color:var(--gray-600);}

  /* Services */
  .grid-services{
    display:grid;grid-template-columns:1fr;gap:1.25rem;
  }
  @media (min-width:640px){ .grid-services{grid-template-columns:1fr 1fr;gap:2rem;} }
  @media (min-width:980px){ .grid-services{grid-template-columns:repeat(3,1fr);} }
  .card{
    background:#fff;border:1px solid #eee;border-radius:var(--radius);
    border-top:4px solid var(--orange);
    padding:1.4rem;
    box-shadow:0 1px 2px rgba(0,0,0,.04);
    transition:box-shadow .2s, transform .2s;
  }
  @media (min-width:640px){ .card{padding:1.75rem;} }
  .card:hover{box-shadow:0 12px 24px rgba(0,0,0,.08);transform:translateY(-2px);}
  .icon-box{
    width:48px;height:48px;border-radius:10px;background:var(--orange);
    display:flex;align-items:center;justify-content:center;margin-bottom:1rem;
  }
  .card h3{font-size:1.2rem;font-weight:600;color:var(--black);margin-bottom:.5rem;}
  .card p{color:var(--gray-600);font-size:.95rem;}

  /* About */
  .about-grid{display:grid;grid-template-columns:1fr;gap:2rem;align-items:center;}
  @media (min-width:860px){ .about-grid{grid-template-columns:1fr 1fr;gap:3rem;} }
  .about-visual{
    border-radius:16px;aspect-ratio:4/3;overflow:hidden;
    box-shadow:0 14px 28px rgba(0,0,0,.12);
  }
  @media (min-width:640px){ .about-visual{border-radius:20px;box-shadow:0 20px 40px rgba(0,0,0,.12);} }
  .about-visual img{width:100%;height:100%;object-fit:cover;}
  .about h2{font-size:clamp(1.6rem, 5vw, 2.2rem);font-weight:700;color:var(--black);margin-bottom:1rem;}
  .about p{color:var(--gray-600);font-size:1.02rem;margin-bottom:1rem;}
  .about strong{color:var(--orange);font-weight:600;}
  .checklist{margin-top:1.25rem;display:flex;flex-direction:column;gap:1rem;}
  .checklist li{display:flex;gap:.9rem;align-items:flex-start;}
  .checklist svg{flex-shrink:0;margin-top:.15rem;color:var(--orange);}
  .checklist h3{font-size:1.02rem;font-weight:600;color:var(--black);}
  .checklist span{color:var(--gray-600);font-size:.92rem;}

  /* Why choose */
  .grid-why{display:grid;grid-template-columns:1fr 1fr;gap:1.75rem 1.25rem;text-align:center;}
  @media (min-width:640px){ .grid-why{gap:2.5rem;} }
  @media (min-width:980px){ .grid-why{grid-template-columns:repeat(4,1fr);} }
  .why-icon{
    width:60px;height:60px;border-radius:50%;background:var(--orange);
    display:flex;align-items:center;justify-content:center;margin:0 auto .85rem;
  }
  @media (min-width:640px){ .why-icon{width:72px;height:72px;margin-bottom:1rem;} }
  .grid-why h3{font-size:1rem;font-weight:600;color:var(--black);margin-bottom:.35rem;}
  @media (min-width:640px){ .grid-why h3{font-size:1.15rem;} }
  .grid-why p{color:var(--gray-600);font-size:.88rem;}
  @media (min-width:640px){ .grid-why p{font-size:.95rem;} }

  /* Contact */
  .contact-grid{display:grid;grid-template-columns:1fr;gap:2rem;}
  @media (min-width:860px){ .contact-grid{grid-template-columns:1fr 1fr;gap:3rem;} }
  .form-card{
    background:#fff;border:1px solid #eee;border-radius:var(--radius);
    padding:1.4rem;box-shadow:0 1px 3px rgba(0,0,0,.06);
  }
  @media (min-width:640px){ .form-card{padding:1.75rem;} }
  .field{margin-bottom:1.1rem;}
  .field label{display:block;font-size:.9rem;font-weight:500;color:var(--black);margin-bottom:.4rem;}
  .field input,.field textarea{
    width:100%;border:1px solid #d1d5db;border-radius:8px;
    padding:.6rem .8rem;font:inherit;font-size:1rem;
  }
  .field input:focus,.field textarea:focus{outline:2px solid var(--orange);outline-offset:1px;}
  .field textarea{min-height:100px;resize:vertical;}

  .contact-info{display:flex;flex-direction:column;gap:1.25rem;}
  .info-item{display:flex;gap:1rem;align-items:flex-start;}
  .info-item .icon-box{margin-bottom:0;flex-shrink:0;}
  .info-item h3{font-weight:600;color:var(--black);margin-bottom:.15rem;}
  .info-item p{color:var(--gray-600);word-break:break-word;}

  .whatsapp-card{
    background:var(--whatsapp);color:#fff;border-radius:var(--radius);
    padding:1.75rem;text-align:center;
  }
  @media (min-width:640px){ .whatsapp-card{padding:2rem;} }
  .whatsapp-card h3{font-size:1.3rem;font-weight:700;margin:.75rem 0 .4rem;}
  .whatsapp-card p{color:#eafff0;margin-bottom:1.2rem;}
  .whatsapp-card .btn{width:100%;justify-content:center;background:#fff;color:var(--whatsapp);}
  .whatsapp-card .btn:hover{background:#f3f3f3;}

  /* Footer */
  footer{background:var(--black);color:#fff;padding:3rem 0 2rem;}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:2rem;text-align:center;}
  @media (min-width:640px){ .footer-grid{text-align:left;} }
  @media (min-width:768px){ .footer-grid{grid-template-columns:repeat(4,1fr);gap:2.5rem;} }
  footer h3{color:var(--orange);font-weight:600;margin-bottom:1rem;font-size:1rem;}
  footer p, footer li{color:#9ca3af;font-size:.95rem;}
  footer .flogo{display:flex;align-items:center;justify-content:center;gap:.6rem;margin-bottom:1rem;}
  @media (min-width:640px){ footer .flogo{justify-content:flex-start;} }
  footer .flogo .logo-img-footer{width:38px;height:38px;}
  footer ul{display:flex;flex-direction:column;align-items:center;gap:.55rem;}
  @media (min-width:640px){ footer ul{align-items:flex-start;} }
  footer ul li a, footer ul li button{
    background:none;border:none;font:inherit;cursor:pointer;color:#9ca3af;transition:color .15s;
  }
  footer ul li a:hover, footer ul li button:hover{color:var(--orange);}
  footer .contact-list li{display:flex;align-items:center;justify-content:center;gap:.5rem;}
  @media (min-width:640px){ footer .contact-list li{justify-content:flex-start;} }
  .footer-bottom{border-top:1px solid #333;margin-top:2rem;padding-top:1.75rem;text-align:center;color:#9ca3af;font-size:.85rem;}
  @media (min-width:640px){ .footer-bottom{margin-top:2.5rem;padding-top:2rem;font-size:.9rem;} }

  /* Floating WhatsApp */
  .float-whatsapp{
    position:fixed;bottom:1.1rem;right:1.1rem;
    width:52px;height:52px;border-radius:50%;
    background:var(--whatsapp);
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 6px 18px rgba(0,0,0,.25);
    transition:transform .2s, background .2s;
    z-index:100;
  }
  @media (min-width:640px){ .float-whatsapp{width:60px;height:60px;bottom:1.5rem;right:1.5rem;} }
  .float-whatsapp:hover{background:var(--whatsapp-dark);transform:scale(1.08);}
  .float-whatsapp svg{width:24px;height:24px;}
  @media (min-width:640px){ .float-whatsapp svg{width:28px;height:28px;} }