/* IMSO — Landing Guia Variadores (VFD). Extraido de la landing original,
   servido por el plugin en /guia-variadores/. Diseno IMSO: Oswald + IBM Plex + ambar. */
  :root{
    --bg:#EDEAE1;
    --bg-alt:#E3DEd0;
    --ink:#1E2226;
    --ink-soft:#565F6A;
    --panel:#20252B;
    --panel-line:#343B44;
    --panel-text:#D8DCE1;
    --amber:#E8A33D;
    --amber-deep:#C87F1F;
    --amber-ink:#3A2A0E;
    --led-green:#6FBE7A;
    --led-red:#D9564A;
    --line: rgba(30,34,38,0.14);
    --line-panel: rgba(216,220,225,0.14);
    --font-display:'Oswald',sans-serif;
    --font-body:'IBM Plex Sans',sans-serif;
    --font-mono:'IBM Plex Mono',monospace;
    --radius:2px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-body);
    font-size:16px;
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  h1,h2,h3{
    font-family:var(--font-display);
    font-weight:600;
    letter-spacing:0.01em;
    margin:0;
    color:var(--ink);
  }
  p{margin:0;}
  a{color:inherit;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
  .eyebrow{
    font-family:var(--font-mono);
    font-size:12.5px;
    letter-spacing:0.14em;
    text-transform:uppercase;
    color:var(--amber-deep);
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:18px;
  }
  .eyebrow::before{
    content:"";
    width:9px;height:9px;
    background:var(--led-green);
    border-radius:50%;
    box-shadow:0 0 0 3px rgba(111,190,122,0.18);
    flex:none;
    animation:blink 2.4s infinite ease-in-out;
  }
  @keyframes blink{0%,100%{opacity:1;}50%{opacity:0.35;}}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    font-family:var(--font-mono);
    font-weight:600;
    font-size:14.5px;
    letter-spacing:0.03em;
    text-transform:uppercase;
    padding:16px 30px;
    border-radius:var(--radius);
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  }
  .btn-primary{
    background:var(--amber);
    color:var(--amber-ink);
    box-shadow:0 1px 0 rgba(0,0,0,0.08), inset 0 0 0 1px rgba(255,255,255,0.25);
  }
  .btn-primary:hover{background:var(--amber-deep); transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{
    background:transparent;
    border-color:var(--line-panel);
    color:var(--panel-text);
  }
  .btn-ghost:hover{border-color:var(--amber); color:var(--amber);}
  .btn-block{width:100%;}

  /* ---------- Header ---------- */
  header.site{
    position:sticky; top:0; z-index:40;
    background:rgba(237,234,225,0.92);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  .nav{display:flex; align-items:center; justify-content:space-between; padding:16px 0;}
  .brand{
    font-family:var(--font-mono);
    font-weight:600;
    font-size:14px;
    letter-spacing:0.06em;
    text-transform:uppercase;
    display:flex;align-items:center;gap:8px;
  }
  .brand .mark{
    width:22px;height:22px;
    background:var(--panel);
    color:var(--amber);
    display:flex;align-items:center;justify-content:center;
    font-family:var(--font-mono);
    font-size:11px;
    border-radius:3px;
  }
  .nav .btn{padding:10px 18px; font-size:12.5px;}
  .nav .btn-primary{color:var(--amber-ink);}
  .nav-cta{background:var(--panel); color:var(--amber); border:1px solid var(--panel);}
  .nav-cta:hover{background:#171b20;}

  /* ---------- Hero ---------- */
  .hero{
    padding:64px 0 76px;
    background:
      radial-gradient(1100px 500px at 85% -10%, rgba(232,163,61,0.10), transparent 60%),
      var(--bg);
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1.05fr 0.95fr;
    gap:56px;
    align-items:start;
  }
  .hero h1{
    font-size:clamp(32px,4.1vw,50px);
    line-height:1.08;
    margin-bottom:20px;
  }
  .hero h1 .accent{color:var(--amber-deep);}
  .hero-sub{
    font-size:17.5px;
    color:var(--ink-soft);
    max-width:52ch;
    margin-bottom:28px;
  }
  .checklist{list-style:none; margin:0 0 34px; padding:0; display:grid; gap:11px;}
  .checklist li{
    display:flex; gap:11px; align-items:flex-start;
    font-size:15px;
  }
  .checklist .chk{
    flex:none; width:18px;height:18px; margin-top:2px;
    border:1.5px solid var(--amber-deep);
    border-radius:3px;
    position:relative;
  }
  .checklist .chk::after{
    content:"";
    position:absolute; left:3px; top:0px;
    width:5px;height:9px;
    border-right:2px solid var(--amber-deep);
    border-bottom:2px solid var(--amber-deep);
    transform:rotate(40deg);
  }

  /* Form card */
  .form-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:6px;
    padding:28px;
    box-shadow:0 20px 44px -20px rgba(30,34,38,0.22);
  }
  .form-card h3{
    font-size:19px;
    margin-bottom:4px;
  }
  .form-card .form-sub{
    font-family:var(--font-mono);
    font-size:12px;
    color:var(--ink-soft);
    text-transform:uppercase;
    letter-spacing:0.06em;
    margin-bottom:20px;
    display:block;
  }
  .field{margin-bottom:14px;}
  .field label{
    display:block;
    font-size:12.5px;
    font-family:var(--font-mono);
    color:var(--ink-soft);
    margin-bottom:6px;
    letter-spacing:0.02em;
  }
  .field label .opt{color:#9a9488; text-transform:none;}
  .field input{
    width:100%;
    padding:12px 13px;
    border:1px solid #D8D3C6;
    border-radius:4px;
    font-family:var(--font-body);
    font-size:15px;
    background:#FBFAF7;
    transition:border-color .15s ease, background .15s ease;
  }
  .field input:focus{
    outline:none;
    border-color:var(--amber-deep);
    background:#fff;
  }
  .form-note{
    font-size:12.5px;
    color:var(--ink-soft);
    margin-top:14px;
    line-height:1.5;
  }
  .form-error{
    display:none;
    background:#FBEAE7;
    border:1px solid #E3B3AB;
    color:#8A3125;
    font-size:13.5px;
    padding:10px 12px;
    border-radius:4px;
    margin-bottom:14px;
    line-height:1.5;
  }
  .form-error.show{display:block;}
  .btn-primary[disabled]{opacity:0.6; cursor:not-allowed;}

  /* ---------- HMI panel (signature element) ---------- */
  .hmi{
    background:var(--panel);
    border-radius:8px;
    padding:22px;
    border:1px solid var(--panel-line);
    position:sticky;
    top:96px;
  }
  .hmi-top{
    display:flex; justify-content:space-between; align-items:center;
    font-family:var(--font-mono);
    font-size:11px;
    color:#8B93A0;
    letter-spacing:0.08em;
    text-transform:uppercase;
    margin-bottom:14px;
  }
  .hmi-leds{display:flex; gap:7px;}
  .led{width:7px;height:7px;border-radius:50%; background:#3A4149;}
  .led.on-green{background:var(--led-green); box-shadow:0 0 6px rgba(111,190,122,0.7);}
  .led.on-red{background:var(--led-red); box-shadow:0 0 6px rgba(217,86,74,0.7); animation:blink 1.4s infinite;}

  .hmi-screen{
    background:#151a1f;
    border:1px solid var(--panel-line);
    border-radius:5px;
    padding:20px 18px 16px;
    margin-bottom:16px;
  }
  .hmi-label{
    font-family:var(--font-mono);
    font-size:10.5px;
    color:#6C7686;
    text-transform:uppercase;
    letter-spacing:0.1em;
    margin-bottom:8px;
  }
  .hmi-code{
    font-family:var(--font-mono);
    font-size:30px;
    font-weight:600;
    color:var(--amber);
    letter-spacing:0.02em;
    min-height:38px;
    text-shadow:0 0 14px rgba(232,163,61,0.35);
  }
  .hmi-desc{
    font-family:var(--font-mono);
    font-size:12.5px;
    color:#AEB6C2;
    margin-top:8px;
    min-height:18px;
  }
  .hmi-meters{display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:16px;}
  .meter-label{
    font-family:var(--font-mono);
    font-size:10px;
    color:#6C7686;
    text-transform:uppercase;
    letter-spacing:0.08em;
    margin-bottom:6px;
    display:flex; justify-content:space-between;
  }
  .meter-track{
    height:6px; background:#151a1f; border-radius:3px; overflow:hidden;
    border:1px solid var(--panel-line);
  }
  .meter-fill{height:100%; background:var(--amber); width:40%; transition:width 1.8s ease;}
  .meter-fill.alt{background:#6C93B0;}
  .hmi-foot{
    font-family:var(--font-mono);
    font-size:11px;
    color:#6C7686;
    border-top:1px solid var(--panel-line);
    padding-top:14px;
    line-height:1.6;
  }
  .hmi-foot b{color:#AEB6C2; font-weight:500;}

  /* ---------- Sections generic ---------- */
  section{padding:76px 0;}
  .section-alt{background:var(--bg-alt);}
  .section-head{max-width:640px; margin-bottom:44px;}
  .section-head .eyebrow{margin-bottom:14px;}
  .section-head h2{font-size:clamp(26px,3vw,36px); line-height:1.15;}
  .section-head p{color:var(--ink-soft); font-size:16.5px; margin-top:14px;}

  .reveal{opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease;}
  .reveal.is-visible{opacity:1; transform:translateY(0);}

  /* Audience grid */
  .audience-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
  }
  .audience-item{
    background:var(--bg-alt);
    padding:24px 22px;
    font-family:var(--font-mono);
    font-size:14.5px;
  }
  .audience-item .n{color:var(--amber-deep); margin-right:8px;}

  /* Learn cards */
  .learn-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line);}
  .learn-card{background:var(--bg); padding:32px 30px;}
  .learn-card .tag{
    font-family:var(--font-mono); font-size:11.5px; color:var(--amber-deep);
    text-transform:uppercase; letter-spacing:0.08em; margin-bottom:10px; display:block;
  }
  .learn-card h3{font-size:20px; margin-bottom:10px; line-height:1.25;}
  .learn-card p{color:var(--ink-soft); font-size:15px;}

  /* Company section */
  .company{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:56px;
    align-items:start;
  }
  .service-list{list-style:none; margin:22px 0 0; padding:0; display:grid; gap:12px;}
  .service-list li{
    display:flex; gap:12px; align-items:baseline;
    font-size:15px; padding-bottom:12px; border-bottom:1px solid var(--line);
  }
  .service-list li .idx{font-family:var(--font-mono); color:var(--amber-deep); font-size:13px; flex:none; width:26px;}
  .philosophy{
    background:var(--panel);
    color:var(--panel-text);
    padding:34px 30px;
    border-radius:6px;
    margin-top:26px;
  }
  .philosophy .eyebrow{color:var(--amber); margin-bottom:14px;}
  .philosophy p.quote{
    font-family:var(--font-display);
    font-size:22px;
    line-height:1.35;
    color:#fff;
    margin-bottom:14px;
  }
  .philosophy p.sub{color:#9AA2AC; font-size:14.5px;}

  /* Sectors + photo placeholders */
  .sector-tags{display:flex; flex-wrap:wrap; gap:10px; margin-bottom:34px;}
  .sector-tag{
    font-family:var(--font-mono); font-size:12.5px; text-transform:uppercase; letter-spacing:0.04em;
    padding:8px 14px; border:1px solid var(--line); border-radius:20px; color:var(--ink-soft);
  }
  .photo-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px;}
  .photo-slot{
    aspect-ratio:4/3;
    border:1.5px dashed #C9C2B2;
    border-radius:5px;
    display:flex; align-items:center; justify-content:center;
    background:repeating-linear-gradient(135deg, rgba(30,34,38,0.03) 0 10px, transparent 10px 20px);
    text-align:center;
    padding:14px;
  }
  .photo-slot span{
    font-family:var(--font-mono); font-size:11.5px; color:#9a9488; line-height:1.5; text-transform:uppercase; letter-spacing:0.04em;
  }
  .photo-real{
    aspect-ratio:4/3;
    border-radius:5px;
    overflow:hidden;
    border:1px solid var(--line);
  }
  .photo-real img{width:100%; height:100%; object-fit:cover; display:block;}

  /* TOC / contents */
  .toc{
    background:var(--panel);
    border-radius:8px;
    padding:8px 0;
  }
  .toc-row{
    display:grid;
    grid-template-columns:110px 1fr;
    gap:20px;
    padding:16px 30px;
    border-bottom:1px solid var(--line-panel);
    align-items:baseline;
  }
  .toc-row:last-child{border-bottom:none;}
  .toc-page{
    font-family:var(--font-mono);
    color:var(--amber);
    font-size:13px;
    letter-spacing:0.03em;
  }
  .toc-title{color:var(--panel-text); font-size:15.5px;}

  /* FAQ */
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item:first-child{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;
    display:flex; align-items:center; gap:16px;
    background:none; border:none; text-align:left;
    padding:22px 0; cursor:pointer;
    font-family:var(--font-body); font-size:17px; font-weight:600; color:var(--ink);
  }
  .faq-q .fcode{
    font-family:var(--font-mono); font-size:12.5px; color:var(--amber-deep);
    flex:none; width:46px;
  }
  .faq-q .plus{margin-left:auto; font-family:var(--font-mono); color:var(--ink-soft); font-size:18px; transition:transform .2s ease;}
  .faq-item.open .plus{transform:rotate(45deg); color:var(--amber-deep);}
  .faq-a{
    max-height:0; overflow:hidden;
    transition:max-height .28s ease;
  }
  .faq-a-inner{padding:0 0 22px 62px; color:var(--ink-soft); font-size:15.5px; max-width:60ch;}

  /* Final CTA */
  .final-cta{
    background:var(--panel);
    color:var(--panel-text);
    border-radius:8px;
    padding:56px 48px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:36px;
  }
  .final-cta h2{color:#fff; font-size:clamp(24px,2.8vw,32px); max-width:18ch; line-height:1.2;}
  .final-cta p{color:#9AA2AC; margin-top:12px; font-size:15px; max-width:42ch;}
  .final-cta .cta-side{flex:none; text-align:right;}
  .final-cta .btn-primary{padding:18px 34px; font-size:15px;}

  /* Footer */
  footer{padding:44px 0; border-top:1px solid var(--line);}
  .footer-row{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px;}
  .footer-row .brand{color:var(--ink-soft);}
  .footer-links{display:flex; gap:22px; font-family:var(--font-mono); font-size:12.5px; color:var(--ink-soft);}
  .footer-links a:hover{color:var(--amber-deep);}

  /* ---------- Thank you view ---------- */
  #thanks{
    display:none;
    min-height:100vh;
    background:var(--panel);
    color:var(--panel-text);
    align-items:center;
  }
  #thanks.active{display:flex;}
  .thanks-wrap{max-width:720px; margin:0 auto; padding:80px 32px; text-align:left;}
  .thanks-icon{
    width:56px;height:56px;
    border:1.5px solid var(--amber);
    border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    margin-bottom:26px;
  }
  .thanks-icon::after{
    content:"";
    width:11px;height:20px;
    border-right:2.5px solid var(--amber);
    border-bottom:2.5px solid var(--amber);
    transform:translateY(-2px) rotate(40deg);
  }
  #thanks h1{color:#fff; font-size:clamp(28px,3.6vw,40px); margin-bottom:16px; line-height:1.15;}
  #thanks .lead{color:#AEB6C2; font-size:16.5px; max-width:52ch; margin-bottom:8px;}
  #thanks .lead-note{color:#7B8492; font-size:14px; margin-bottom:40px;}
  .resource-grid{display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--panel-line); border:1px solid var(--panel-line); margin-bottom:36px;}
  .resource-card{
    background:#181D23; padding:22px;
    display:flex; flex-direction:column; gap:8px;
    text-decoration:none;
  }
  .resource-card .fcode{font-family:var(--font-mono); font-size:11.5px; color:var(--amber-deep);}
  .resource-card h3{color:#fff; font-size:15.5px; font-family:var(--font-body); font-weight:600;}
  .resource-card p{color:#8B93A0; font-size:13.5px;}
  .resource-card:hover{background:#1D2329;}

  /* ---------- Responsive ---------- */
  @media (max-width:900px){
    .hero-grid{grid-template-columns:1fr;}
    .hmi{position:static;}
    .audience-grid{grid-template-columns:1fr 1fr;}
    .learn-grid{grid-template-columns:1fr;}
    .company{grid-template-columns:1fr;}
    .photo-grid{grid-template-columns:1fr 1fr;}
    .final-cta{flex-direction:column; align-items:flex-start; text-align:left;}
    .final-cta .cta-side{text-align:left;}
    .resource-grid{grid-template-columns:1fr;}
  }
  @media (max-width:560px){
    .wrap{padding:0 20px;}
    .audience-grid{grid-template-columns:1fr;}
    .toc-row{grid-template-columns:70px 1fr; padding:14px 18px;}
    .faq-a-inner{padding-left:0;}
    .final-cta{padding:36px 26px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important; transition:none !important;}
  }