/* ============================================================
   landing.css — estilos compartidos de las páginas de servicio
   (/inteligencia-artificial, /tiendas-online, /erp-crm, /diseno-web-apps)
   Reutiliza los tokens y componentes del index.html (mismo look),
   más clases long-form (breadcrumb, prose, feature-grid).
   Cargada con <link rel="stylesheet"> => CSP style-src 'self' OK.
   ============================================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;-webkit-font-smoothing:antialiased;background:#06080f;color:#e2e8f0;overflow-x:hidden;min-height:100vh;min-height:100dvh}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}

:root{
  --orange:#f97316;--orange-light:#fb923c;--orange-dark:#ea580c;
  --purple:#8b5cf6;--purple-light:#a78bfa;--purple-dark:#7c3aed;
  --amber:#f59e0b;--green:#22c55e;--green-light:#4ade80;
  --gradient:linear-gradient(135deg,var(--orange),var(--purple));
  --gradient-green:linear-gradient(135deg,var(--green),var(--purple));
  --glow-orange:rgba(249,115,22,.15);--glow-purple:rgba(139,92,246,.15);
  --bg-0:#06080f;--bg-1:#0c1019;--bg-2:#141928;--bg-3:#1c2333;
  --border:rgba(255,255,255,.06);--border-hover:rgba(255,255,255,.12);
  --text-1:#f1f5f9;--text-2:#94a3b8;--text-3:#64748b;
  --radius:14px;--radius-lg:20px;--radius-xl:28px;
}

/* background layers */
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(249,115,22,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(139,92,246,.025) 1px,transparent 1px);background-size:60px 60px}
.bg-glow{position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse 60% 50% at 20% 0%,rgba(249,115,22,.08),transparent),radial-gradient(ellipse 50% 60% at 80% 10%,rgba(139,92,246,.08),transparent)}

/* nav (idéntico al home) */
header{position:fixed;top:0;left:0;right:0;z-index:100;padding:0 24px;background:rgba(6,8,15,.75);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);height:64px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--text-1)}
.nav-logo img{height:34px;width:auto}
.nav-logo span{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
nav{display:flex;align-items:center;gap:6px}
nav a{padding:8px 16px;border-radius:10px;font-size:14px;font-weight:500;color:var(--text-2);transition:.2s}
nav a:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-btn{padding:8px 20px!important;background:var(--gradient)!important;color:#fff!important;border-radius:10px!important;font-weight:600!important}
.nav-hamburger{display:none;background:none;border:none;color:var(--text-1);cursor:pointer;padding:8px}
.nav-hamburger svg{width:24px;height:24px}
.nav-overlay{display:none;position:fixed;inset:0;z-index:99;background:rgba(6,8,15,.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-direction:column;align-items:center;justify-content:center;gap:16px}
.nav-overlay.open{display:flex}
.nav-overlay>a{font-size:20px;font-weight:600;color:var(--text-1);padding:12px 32px;border-radius:12px;width:240px;text-align:center}
.nav-overlay>a:hover{background:rgba(255,255,255,.05)}
.nav-overlay .close-btn{position:absolute;top:20px;right:20px;background:none;border:none;color:var(--text-1);cursor:pointer;padding:8px}
.nav-overlay .close-btn svg{width:24px;height:24px}

/* skip link */
.skip-link{position:absolute;top:-40px;left:8px;background:var(--bg-3);color:var(--text-1);padding:10px 16px;border-radius:8px;border:1px solid var(--border);font-weight:600;font-size:14px;z-index:1000;transition:top .2s}
.skip-link:focus{top:8px;outline:2px solid var(--orange);outline-offset:2px}

/* breadcrumb */
.breadcrumb{position:relative;z-index:2;max-width:900px;margin:0 auto;padding:96px 24px 0;font-size:13px;color:var(--text-3)}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--orange-light)}
.breadcrumb span{color:var(--text-3);margin:0 8px}

/* hero (long-form) */
.lp-hero{position:relative;z-index:2;max-width:900px;margin:0 auto;padding:40px 24px 20px;text-align:center}
.lp-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:linear-gradient(135deg,rgba(249,115,22,.1),rgba(139,92,246,.1));border:1px solid rgba(249,115,22,.18);border-radius:100px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--orange-light);margin-bottom:24px}
.lp-hero h1{font-size:clamp(32px,5.2vw,56px);font-weight:900;line-height:1.08;letter-spacing:-.03em;background:linear-gradient(135deg,#fff 0%,#cbd5e1 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:22px}
.lp-hero h1 em{font-style:normal;background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.lp-hero>p{font-size:clamp(16px,2vw,20px);color:var(--text-2);line-height:1.7;max-width:680px;margin:0 auto 32px}
.lp-cta-row{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.btn-primary{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;background:var(--gradient);color:#fff;border:none;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;transition:.25s;box-shadow:0 4px 24px rgba(249,115,22,.2),0 4px 24px rgba(139,92,246,.15)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-secondary{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;background:var(--bg-2);border:1.5px solid var(--border);color:var(--text-1);border-radius:var(--radius);font-size:16px;font-weight:500;transition:.25s}
.btn-secondary:hover{border-color:var(--orange);background:rgba(249,115,22,.05);transform:translateY(-2px)}

/* sections */
.section{position:relative;z-index:2;padding:72px 24px;max-width:1080px;margin:0 auto;scroll-margin-top:80px}
.section-center{text-align:center}
.section-label{display:inline-flex;align-items:center;gap:8px;padding:4px 14px;background:linear-gradient(135deg,rgba(249,115,22,.1),rgba(139,92,246,.1));border:1px solid rgba(249,115,22,.15);border-radius:100px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;margin-bottom:18px;color:var(--orange-light)}
.section-title{font-size:clamp(26px,4vw,40px);font-weight:800;letter-spacing:-.03em;line-height:1.12;margin-bottom:16px;color:var(--text-1)}
.section-sub{font-size:clamp(15px,1.5vw,18px);color:var(--text-2);line-height:1.7;max-width:680px;margin:0 auto 44px}

/* prose intro */
.prose{max-width:760px;margin:0 auto;text-align:left}
.prose p{font-size:16px;color:var(--text-2);line-height:1.8;margin-bottom:18px}
.prose strong{color:var(--text-1);font-weight:600}

/* feature grid (cards) */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;text-align:left}
.feature-card{background:var(--bg-1);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;transition:.3s;position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--gradient);opacity:0;transition:.3s}
.feature-card:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:0 8px 40px rgba(0,0,0,.25)}
.feature-card:hover::before{opacity:1}
.feature-card .fi{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(249,115,22,.08);color:var(--orange-light);border:1px solid var(--border);margin-bottom:16px}
.feature-card .fi svg{width:24px;height:24px}
.feature-card.alt .fi{background:rgba(139,92,246,.08);color:var(--purple-light)}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:10px;color:var(--text-1)}
.feature-card p{font-size:14px;color:var(--text-2);line-height:1.7}

/* checklist */
.check-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px 28px;text-align:left;max-width:840px;margin:0 auto}
.check-list li{list-style:none;display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2);line-height:1.6;padding:6px 0}
.check-list li svg{flex-shrink:0;width:22px;height:22px;color:var(--green-light);margin-top:1px}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:12px;text-align:left;max-width:820px;margin:0 auto}
.faq-item{background:var(--bg-1);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:var(--border-hover)}
.faq-item[open]{border-color:rgba(249,115,22,.22)}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 26px;font-size:16px;font-weight:600;color:var(--text-1);display:flex;align-items:center;justify-content:space-between;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:24px;font-weight:300;color:var(--orange-light);transition:transform .3s;line-height:1}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 26px 20px;font-size:15px;color:var(--text-2);line-height:1.7}

/* cta + contact form (reusa el del home, app.js lo cablea) */
.cta{position:relative;z-index:2;padding:64px 24px 40px;max-width:800px;margin:0 auto;text-align:center}
.cta-box{background:var(--bg-1);border:1px solid var(--border);border-radius:var(--radius-xl);padding:56px 44px;position:relative;overflow:hidden}
.cta-box::after{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--gradient)}
.cta-box h2{font-size:clamp(24px,3.5vw,34px);font-weight:800;letter-spacing:-.02em;margin-bottom:14px;color:var(--text-1)}
.cta-box p{font-size:16px;color:var(--text-2);line-height:1.7;max-width:520px;margin:0 auto 32px}
.contact-form{display:grid;gap:14px;max-width:520px;margin:0 auto;text-align:left}
.contact-form .row2{display:grid;gap:14px;grid-template-columns:1fr 1fr}
.contact-form label{display:block;font-size:13px;font-weight:500;color:var(--text-2);margin-bottom:6px}
.contact-form input,.contact-form textarea{width:100%;padding:13px 14px;background:var(--bg-2);border:1px solid var(--border);border-radius:12px;color:var(--text-1);font-size:16px;font-family:inherit;transition:.2s;resize:vertical}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--orange);background:var(--bg-3);box-shadow:0 0 0 3px rgba(249,115,22,.15)}
.contact-form input[aria-invalid="true"],.contact-form textarea[aria-invalid="true"]{border-color:#ef4444;box-shadow:0 0 0 3px rgba(239,68,68,.18)}
.contact-form textarea{min-height:120px;line-height:1.5}
.contact-form .hp{position:absolute;left:-9999px;top:-9999px;width:1px;height:1px;opacity:0;pointer-events:none}
.contact-form button{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 28px;background:var(--gradient);color:#fff;border:none;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;transition:.2s;font-family:inherit;box-shadow:0 4px 24px rgba(249,115,22,.2),0 4px 24px rgba(139,92,246,.15)}
.contact-form button:hover:not(:disabled){transform:translateY(-1px)}
.contact-form button:disabled{opacity:.55;cursor:progress;transform:none}
.contact-form .consent{font-size:12px;color:var(--text-3);line-height:1.5}
.contact-form .consent a{color:var(--text-2);border-bottom:1px solid var(--border)}
.form-msg{padding:12px 14px;border-radius:12px;font-size:14px;display:none}
.form-msg.ok{display:block;background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:var(--green-light)}
.form-msg.err{display:block;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);color:#fca5a5}
.cta-alt{margin-top:20px;font-size:14px;color:var(--text-3)}
.cta-alt a{color:var(--text-2);border-bottom:1px solid var(--border);padding-bottom:1px}
.cta-alt a:hover{color:var(--orange-light)}

/* related links */
.related{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:8px}
.related a{padding:8px 16px;border:1px solid var(--border);border-radius:100px;font-size:13px;font-weight:600;color:var(--text-2);background:var(--bg-1);transition:.2s}
.related a:hover{border-color:var(--orange);color:var(--text-1)}

/* footer */
footer{position:relative;z-index:2;border-top:1px solid var(--border);padding:32px 24px;display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;font-size:13px;color:var(--text-3)}
footer a{color:var(--text-2);transition:.2s}
footer a:hover{color:var(--orange-light)}
.footer-logo{display:flex;align-items:center;gap:8px}
.footer-logo img{height:22px;width:auto}
.footer-logo span{font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.footer-links{display:flex;gap:24px;flex-wrap:wrap}

/* privacy banner */
.privacy-banner{position:fixed;bottom:16px;left:16px;right:16px;max-width:520px;margin:0 auto;z-index:300;padding:14px 18px;background:rgba(20,25,40,.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.4);font-size:13px;color:var(--text-2);line-height:1.5;display:none;align-items:center;gap:14px}
.privacy-banner.show{display:flex}
.privacy-banner a{color:var(--text-1);border-bottom:1px solid var(--border-hover)}
.privacy-banner button{flex-shrink:0;padding:8px 18px;background:var(--gradient);color:#fff;border:none;border-radius:10px;font-weight:600;font-size:13px;cursor:pointer;font-family:inherit}

/* animations */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.animate{opacity:0;transform:translateY(24px)}
.animate.visible{animation:fadeUp .6s ease forwards}
.lp-hero .animate{opacity:1;transform:none}

/* responsive */
@media(max-width:768px){
  header{padding:0 14px;height:60px}
  nav a:not(.nav-btn){display:none}
  .nav-hamburger{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px}
  .breadcrumb{padding-top:80px}
  .lp-hero{padding:24px 18px 12px}
  .lp-cta-row{flex-direction:column;align-items:stretch;max-width:340px;margin:0 auto}
  .btn-primary,.btn-secondary{width:100%;justify-content:center}
  .section{padding:52px 18px}
  .feature-grid{grid-template-columns:1fr}
  .contact-form .row2{grid-template-columns:1fr}
  .cta-box{padding:40px 22px}
  footer{flex-direction:column;gap:14px;text-align:center}
  .footer-links{justify-content:center;gap:12px 18px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.animate{opacity:1;transform:none;animation:none}}