:root{
  --bg: #0b0f17;
  --bg2:#0f1624;
  --card:#121c2e;
  --text:#e9eef7;
  --muted:#b7c3d6;
  --line: rgba(255,255,255,.10);
  --accent:#ff4d3d;
  --accent2:#20c997;
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --radius: 18px;
  --max: 1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 800px at 10% 10%, rgba(255,77,61,.18), transparent 60%),
              radial-gradient(900px 650px at 90% 20%, rgba(32,201,151,.14), transparent 55%),
              linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
  line-height:1.5;
}

a{color:inherit}
img{max-width:100%; height:auto; display:block}

.ia4-container{max-width:var(--max); margin:0 auto; padding:0 20px}
.ia4-header{
  position:sticky; top:0; z-index:50;
  background: rgba(11,15,23,.70);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.ia4-header-inner{display:flex; align-items:center; justify-content:space-between; padding:14px 0; gap:16px}
.ia4-brand{display:flex; align-items:center; gap:12px; text-decoration:none}

.custom-logo-link{display:block}
.custom-logo{width:160px; height:auto;}
.ia4-logo{width:160px}
.ia4-nav{display:flex; align-items:center; gap:18px; flex-wrap:wrap}
.ia4-nav a{
  text-decoration:none;
  color: var(--muted);
  font-size:14px;
  padding:8px 10px;
  border-radius:12px;
}
.ia4-nav a:hover{color:var(--text); background: rgba(255,255,255,.06)}
.ia4-cta{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 14px;
  border-radius:14px;
  background: linear-gradient(90deg, var(--accent), #ff7a3d);
  color:#0b0f17;
  font-weight:700;
  text-decoration:none;
  box-shadow: var(--shadow);
}
.ia4-cta:hover{filter:brightness(1.05)}

.ia4-hero{padding:56px 0 20px}
.ia4-hero-grid{display:grid; grid-template-columns: 1.15fr .85fr; gap:28px; align-items:center}
.ia4-kicker{
  display:inline-flex; gap:10px; align-items:center;
  padding:8px 12px; border:1px solid var(--line);
  border-radius:999px; color:var(--muted); font-size:13px;
  background: rgba(255,255,255,.04);
}
.ia4-h1{font-size:46px; line-height:1.05; margin:14px 0 12px}
.ia4-sub{font-size:18px; color:var(--muted); margin:0 0 22px}
.ia4-actions{display:flex; gap:12px; flex-wrap:wrap}
.ia4-btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 16px; border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  text-decoration:none;
  color:var(--text);
  font-weight:600;
}
.ia4-btn:hover{background: rgba(255,255,255,.08)}
.ia4-btn.primary{
  border:none;
  background: linear-gradient(90deg, var(--accent), #ff7a3d);
  color:#0b0f17;
}
.ia4-hero-card{
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.ia4-hero-card .media{position:relative}
.ia4-hero-card .media img{width:100%; height:auto; display:block}
.ia4-hero-card .badge{
  position:absolute; left:14px; top:14px;
  background: rgba(11,15,23,.75);
  border:1px solid rgba(255,255,255,.14);
  padding:8px 10px;
  border-radius:14px;
  font-size:13px;
  color: var(--text);
}

.ia4-section{padding:56px 0}
.ia4-section.alt{background: rgba(255,255,255,.02); border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
.ia4-title{font-size:30px; margin:0 0 12px}
.ia4-lead{color:var(--muted); margin:0 0 22px; max-width:820px}

.ia4-grid-2{display:grid; grid-template-columns:1fr 1fr; gap:22px}
.ia4-card{
  border:1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  box-shadow: var(--shadow);
  padding:20px;
}
.ia4-card h3{margin:0 0 10px; font-size:18px}
.ia4-card p{margin:0; color:var(--muted)}
.ia4-bullets{margin:0; padding-left:18px; color:var(--muted)}
.ia4-bullets li{margin:10px 0}

.ia4-stats{display:grid; grid-template-columns:repeat(5,1fr); gap:14px}
.ia4-stat{
  padding:16px;
  border:1px solid var(--line);
  border-radius:16px;
  background: rgba(255,255,255,.03);
}
.ia4-stat .num{font-size:22px; font-weight:800}
.ia4-stat .lbl{color:var(--muted); font-size:13px; margin-top:6px}
.ia4-pill{display:inline-flex; gap:8px; align-items:center; padding:8px 12px; border:1px solid var(--line); border-radius:999px; background: rgba(255,255,255,.03); color:var(--muted); font-size:13px}

.ia4-feature{display:grid; grid-template-columns: 0.9fr 1.1fr; gap:22px; align-items:center}
.ia4-feature img{border-radius: var(--radius); border:1px solid var(--line); box-shadow: var(--shadow)}
.ia4-feat-list{display:grid; gap:12px}
.ia4-feat-item{padding:16px; border-radius:16px; border:1px solid var(--line); background: rgba(255,255,255,.03)}
.ia4-feat-item .t{font-weight:800}
.ia4-feat-item .d{color:var(--muted); margin-top:6px}

.ia4-steps{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
.ia4-step{padding:18px; border-radius:16px; border:1px solid var(--line); background: rgba(255,255,255,.03)}
.ia4-step .k{font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:var(--muted)}
.ia4-step .t{font-size:16px; font-weight:800; margin-top:6px}
.ia4-step .d{color:var(--muted); margin-top:6px; font-size:14px}

.ia4-contact{display:grid; grid-template-columns: 1.15fr 0.85fr; gap:22px; align-items:start}
.ia4-person{
  display:flex; gap:16px; align-items:center;
}
.ia4-person img{
  width:96px; height:96px; border-radius:22px; object-fit:cover;
  border:1px solid var(--line);
}
.ia4-person .name{font-weight:900; font-size:18px}
.ia4-person .role{color:var(--muted); font-size:13px}

.ia4-kv{display:grid; gap:10px; margin-top:14px}
.ia4-kv .row{display:flex; gap:10px; color:var(--muted); align-items:flex-start}
.ia4-kv .row strong{color:var(--text); min-width:110px}

.ia4-form label{display:block; font-weight:700; font-size:13px; margin:12px 0 6px}
.ia4-form input, .ia4-form textarea, .ia4-form select{
  width:100%;
  padding:12px 12px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.16);
  background: rgba(11,15,23,.40);
  color: var(--text);
  outline:none;
}
.ia4-form textarea{min-height:120px; resize:vertical}
.ia4-form .row{display:grid; grid-template-columns:1fr 1fr; gap:12px}
.ia4-form .help{color:var(--muted); font-size:12px; margin-top:8px}
.ia4-form .consent{display:flex; gap:10px; align-items:flex-start; margin-top:12px; color:var(--muted); font-size:12px}
.ia4-form .consent input{width:18px; height:18px; margin-top:2px}
.ia4-form .submit{margin-top:14px}
.ia4-alert{
  padding:14px 16px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.16);
  background: rgba(32,201,151,.12);
  color: var(--text);
  margin-bottom:14px;
}
.ia4-alert.err{background: rgba(255,77,61,.12)}
.ia4-footer{
  padding:28px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size:12px;
}
.ia4-footer a{color: var(--muted)}
.ia4-footer a:hover{color: var(--text)}

@media (max-width: 980px){
  .ia4-hero-grid{grid-template-columns:1fr; }
  .ia4-feature{grid-template-columns:1fr}
  .ia4-contact{grid-template-columns:1fr}
  .ia4-stats{grid-template-columns:repeat(2,1fr)}
  .ia4-steps{grid-template-columns:repeat(2,1fr)}
  .ia4-h1{font-size:38px}
}
@media (max-width: 520px){
  .ia4-nav{display:none}
  .ia4-stats{grid-template-columns:1fr}
  .ia4-steps{grid-template-columns:1fr}
  .ia4-form .row{grid-template-columns:1fr}
  .ia4-h1{font-size:34px}
}


/* Correcciones IA4-AUTO */
.ia4-feature img{width:100%; height:auto; display:block;}
.ia4-card.media-card img,
.ia4-card img.ia4-problem-img{
  width:100%;
  aspect-ratio: 16 / 9;
  height:auto;
  object-fit:cover;
  object-position:center;
  display:block;
}
#contacto{scroll-margin-top:96px;}
#ruben-contact{scroll-margin-top:96px;}

.ia4-credits{margin-top:18px; font-size:12px; color:rgba(255,255,255,.55);}
.ia4-credits a{color:rgba(255,255,255,.75); text-decoration:underline;}