/* ============================================================
   RAA OTEC — Sistema de diseño premium
   Paleta: azul petróleo, verde salvia, dorado, grafito
   ============================================================ */
:root{
  --c-primary:#1F5C6D; --c-secondary:#8FAF9B; --c-dark:#2F3740;
  --c-gold:#D8B16A; --c-light:#F5F7F6; --white:#ffffff;
  --c-primary-soft:#eaf1f2; --c-sage-soft:#eef3ef;
  --radius:16px; --radius-sm:10px; --radius-lg:26px;
  --shadow-sm:0 4px 14px rgba(31,92,109,.08);
  --shadow:0 12px 40px rgba(31,92,109,.12);
  --shadow-lg:0 24px 60px rgba(31,92,109,.18);
  --font:'Poppins',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-serif:'Fraunces','Playfair Display',Georgia,serif;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--c-dark);background:var(--white);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:.25s}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--c-primary);line-height:1.15;font-weight:600;letter-spacing:-.01em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--soft{background:var(--c-light)}
.section--sage{background:var(--c-sage-soft)}
.text-center{text-align:center}
.eyebrow{display:inline-block;font-family:var(--font);font-weight:600;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;color:var(--c-gold);margin-bottom:14px}
.section-title{font-size:clamp(1.9rem,3.4vw,2.8rem);margin-bottom:16px}
.section-sub{max-width:640px;margin:0 auto 8px;color:#5c6672;font-size:1.05rem}
.lead{font-size:1.15rem;color:#5c6672}

/* ---------- Botones ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 26px;border-radius:999px;font-weight:600;font-size:.98rem;cursor:pointer;border:2px solid transparent;transition:.25s;white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:#164653;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-gold{background:var(--c-gold);color:#3a2e12}
.btn-gold:hover{background:#c99f52;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-outline{border-color:var(--c-primary);color:var(--c-primary);background:transparent}
.btn-outline:hover{background:var(--c-primary);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:var(--c-primary-soft);color:var(--c-primary)}
.btn-ghost:hover{background:var(--c-primary);color:#fff}
.btn-wa{background:#25D366;color:#fff}
.btn-wa:hover{background:#1da851;transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:.85rem}
.btn-block{width:100%;justify-content:center}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid #eef1f0;transition:.3s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;height:82px;gap:24px}
.brand-logo{display:flex;align-items:center;gap:12px;font-family:var(--font-serif);font-weight:700;font-size:1.5rem;color:var(--c-primary)}
.brand-logo img{height:46px;width:auto}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none}
.nav-links a{padding:10px 14px;border-radius:999px;font-weight:500;font-size:.95rem;color:var(--c-dark)}
.nav-links a:hover,.nav-links a.active{color:var(--c-primary);background:var(--c-primary-soft)}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--c-primary)}
.nav-toggle svg{width:28px;height:28px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:70px 0 90px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(2.3rem,4.6vw,3.6rem);margin-bottom:10px}
.hero .hero-lead{font-size:clamp(1.25rem,2vw,1.6rem);color:var(--c-secondary);font-family:var(--font-serif);font-weight:600;margin-bottom:18px}
.hero p.desc{font-size:1.12rem;color:#5c6672;max-width:540px;margin-bottom:30px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.hero-attrs{display:flex;gap:26px;flex-wrap:wrap}
.hero-attr{display:flex;align-items:center;gap:10px;font-weight:500;font-size:.95rem;color:var(--c-dark)}
.hero-attr .ic{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--c-sage-soft);color:var(--c-primary)}
.hero-attr svg{width:20px;height:20px}
.hero-media{position:relative}
.hero-media img{border-radius:140px 140px 26px 26px;box-shadow:var(--shadow-lg);width:100%;height:560px;object-fit:cover}
.hero-media .badge-float{position:absolute;bottom:26px;left:-24px;background:#fff;border-radius:18px;padding:16px 20px;box-shadow:var(--shadow);display:flex;align-items:center;gap:12px}
.hero-media .badge-float .n{font-family:var(--font-serif);font-size:1.7rem;color:var(--c-primary);font-weight:700}
.hero-media .badge-float small{color:#7a838c;font-size:.8rem}
.hero-blob{position:absolute;width:420px;height:420px;background:radial-gradient(circle,var(--c-sage-soft),transparent 70%);top:-80px;right:-120px;z-index:-1;border-radius:50%}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid #eef1f0;border-radius:var(--radius);padding:30px;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card .ic-box{width:58px;height:58px;border-radius:16px;display:grid;place-items:center;background:var(--c-primary-soft);color:var(--c-primary);margin-bottom:18px}
.card .ic-box svg{width:26px;height:26px}
.card h3{font-size:1.25rem;margin-bottom:10px}
.card p{color:#5c6672;font-size:.97rem}
.area-card{position:relative;overflow:hidden}
.area-card .bar{position:absolute;top:0;left:0;height:5px;width:100%;background:var(--c-gold)}

/* Feature list (por qué elegir) */
.why-item{display:flex;gap:18px;align-items:flex-start}
.why-item .ic{flex:none;width:52px;height:52px;border-radius:14px;background:var(--c-sage-soft);color:var(--c-primary);display:grid;place-items:center}
.why-item .ic svg{width:24px;height:24px}
.why-item h4{font-family:var(--font);font-weight:600;font-size:1.05rem;color:var(--c-primary);margin-bottom:4px}
.why-item p{color:#5c6672;font-size:.94rem}

/* Metodología */
.method-step{background:#fff;border-radius:var(--radius);padding:32px 26px;border:1px solid #eef1f0;position:relative;overflow:hidden}
.method-step .n{font-family:var(--font-serif);font-size:2.6rem;color:var(--c-sage-soft);font-weight:700;line-height:1}
.method-step h4{margin:8px 0 8px;font-family:var(--font);font-size:1.15rem;color:var(--c-primary)}
.method-step p{color:#5c6672;font-size:.95rem}

/* CTA */
.cta{background:linear-gradient(135deg,var(--c-primary),#164653);color:#fff;border-radius:var(--radius-lg);padding:64px;position:relative;overflow:hidden}
.cta h2{color:#fff;font-size:clamp(1.8rem,3vw,2.6rem);margin-bottom:14px}
.cta p{color:rgba(255,255,255,.85);font-size:1.1rem;max-width:560px}
.cta-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.cta form{background:#fff;border-radius:var(--radius);padding:30px}
.cta .contact-row{display:flex;gap:20px;flex-wrap:wrap;margin-top:24px}
.cta .contact-row a{display:flex;align-items:center;gap:8px;color:#fff;font-weight:500}
.cta .contact-row svg{width:18px;height:18px}

/* Course cards */
.course-card{background:#fff;border:1px solid #eef1f0;border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.course-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.course-card .thumb{height:180px;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));position:relative}
.course-card .thumb img{width:100%;height:100%;object-fit:cover}
.course-card .tag{position:absolute;top:14px;left:14px;background:var(--c-gold);color:#3a2e12;padding:5px 12px;border-radius:999px;font-size:.72rem;font-weight:600}
.course-card .body{padding:22px;flex:1;display:flex;flex-direction:column}
.course-card .meta{display:flex;gap:14px;flex-wrap:wrap;font-size:.8rem;color:#8a929b;margin-bottom:10px}
.course-card h3{font-size:1.15rem;margin-bottom:12px;font-family:var(--font);font-weight:600;color:var(--c-primary)}
.course-card .foot{margin-top:auto;display:flex;gap:8px;padding-top:16px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;background:var(--c-primary-soft);color:var(--c-primary);font-size:.78rem;font-weight:600}

/* Forms */
.field{margin-bottom:16px}
.field label{display:block;font-weight:500;font-size:.9rem;margin-bottom:6px;color:var(--c-dark)}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid #e2e7e6;border-radius:var(--radius-sm);font-family:var(--font);font-size:.95rem;transition:.2s;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-soft)}
.field textarea{min-height:120px;resize:vertical}

/* Footer */
.site-footer{background:var(--c-dark);color:#c9cfd4;padding:70px 0 30px}
.site-footer h4{color:#fff;font-family:var(--font);font-size:1rem;margin-bottom:18px;font-weight:600}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:44px}
.footer-grid a{color:#9aa3ab;font-size:.92rem;display:block;padding:5px 0}
.footer-grid a:hover{color:var(--c-gold)}
.footer-brand p{color:#9aa3ab;font-size:.92rem;margin-top:16px;max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.08);display:grid;place-items:center;color:#fff}
.footer-social a:hover{background:var(--c-gold);color:#3a2e12}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.85rem;color:#7d868f}

/* WhatsApp flotante */
.wa-float{position:fixed;bottom:24px;right:24px;z-index:200;width:60px;height:60px;border-radius:50%;background:#25D366;display:grid;place-items:center;box-shadow:0 8px 30px rgba(37,211,102,.4);color:#fff;animation:pulse 2.4s infinite}
.wa-float svg{width:32px;height:32px}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(37,211,102,.5)}70%{box-shadow:0 0 0 18px rgba(37,211,102,0)}100%{box-shadow:0 0 0 0 rgba(37,211,102,0)}}

/* Alerts */
.alert{padding:14px 18px;border-radius:var(--radius-sm);margin-bottom:18px;font-size:.92rem}
.alert-success{background:#e7f4ec;color:#1c6b3f;border:1px solid #bfe3cd}
.alert-danger{background:#fdeaea;color:#a12626;border:1px solid #f4c6c6}

/* Page hero (interior) */
.page-hero{background:linear-gradient(135deg,var(--c-primary),#164653);color:#fff;padding:70px 0}
.page-hero h1{color:#fff;font-size:clamp(2rem,4vw,3rem)}
.page-hero p{color:rgba(255,255,255,.85);max-width:640px;margin-top:10px;font-size:1.08rem}
.breadcrumb{font-size:.85rem;color:rgba(255,255,255,.7);margin-bottom:12px}
.breadcrumb a{color:rgba(255,255,255,.9)}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* Accreditation strip */
.accred-note{font-size:.82rem;color:#8a929b;font-style:italic}
.badge-accred{display:inline-flex;align-items:center;gap:8px;background:var(--c-gold);color:#3a2e12;padding:6px 14px;border-radius:999px;font-size:.8rem;font-weight:600}

/* Responsive */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .hero-media{order:-1}
  .hero-media img{height:360px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .cta-grid,.footer-grid{grid-template-columns:1fr}
  .cta{padding:40px}
  .nav-links{position:fixed;inset:82px 0 auto 0;background:#fff;flex-direction:column;padding:20px;box-shadow:var(--shadow);display:none;align-items:stretch}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .section{padding:64px 0}
}
@media(max-width:600px){
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .hero-media img{border-radius:60px 60px 20px 20px}
}