/* Ayúdate - estilos base */
:root{
  --bg: #0b1220;
  --panel: #0f1a2f;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.08);
  --text: #eaf2ff;
  --muted: rgba(234,242,255,.72);
  --brand: #0ea5e9;
  --brand2: #22c55e;
  --border: rgba(234,242,255,.12);
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --radius: 18px;
  --radius2: 14px;
  --container: 1100px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 900px at 15% 5%, rgba(14,165,233,.28), transparent 60%),
    radial-gradient(900px 700px at 85% 10%, rgba(34,197,94,.18), transparent 60%),
    radial-gradient(900px 700px at 40% 90%, rgba(99,102,241,.15), transparent 60%),
    var(--bg);
  line-height: 1.6;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }
.container{
  width: min(var(--container), calc(100% - 2rem));
  margin-inline: auto;
}

.skip-link{
  position:absolute;
  left:-999px;
  top:0;
  background: var(--brand);
  color:#041018;
  padding:.75rem 1rem;
  border-radius: 12px;
  z-index:1000;
}
.skip-link:focus{ left: 1rem; top: 1rem; }

.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(11,18,32,.72);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:.7rem;
  font-weight: 800;
  letter-spacing: .2px;
}
.brand-mark{
  width: 38px; height: 38px;
  display:grid; place-items:center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(14,165,233,.95), rgba(34,197,94,.75));
  color: #041018;
  box-shadow: var(--shadow);
  font-weight: 900;
}
.brand-name{ font-size: 1.05rem; }

.site-nav{
  display:flex;
  align-items:center;
  gap: .9rem;
}
.site-nav a{
  font-weight: 600;
  color: var(--muted);
  padding: .45rem .55rem;
  border-radius: 12px;
}
.site-nav a:hover{
  color: var(--text);
  background: rgba(255,255,255,.06);
  text-decoration:none;
}

.nav-toggle{
  display:none;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  color: var(--text);
  padding: .55rem .65rem;
  border-radius: 14px;
}
.nav-toggle-bars{
  width: 22px; height: 14px; display:block;
  background:
    linear-gradient(var(--text), var(--text)) 0 0/100% 2px,
    linear-gradient(var(--text), var(--text)) 0 6px/100% 2px,
    linear-gradient(var(--text), var(--text)) 0 12px/100% 2px;
  background-repeat:no-repeat;
  opacity: .9;
}

/* Hero */
.hero{
  padding: 3rem 0 2.2rem;
}
.hero-inner{
  display:grid;
  grid-template-columns: 1.3fr .9fr;
  gap: 1.6rem;
  align-items: stretch;
}
.hero h1{
  font-size: clamp(2rem, 3.6vw, 3.1rem);
  line-height: 1.1;
  margin: 0 0 .85rem;
}
.accent{ color: var(--brand); }
.hero p{
  color: var(--muted);
  margin: 0 0 1.1rem;
  max-width: 62ch;
}
.hero-actions{
  display:flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.notice{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius2);
  padding: .9rem 1rem;
  color: var(--muted);
  max-width: 70ch;
}
.notice strong{ color: var(--text); }

.hero-card{
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.1rem 1.2rem;
}
.stat{
  display:flex;
  align-items: baseline;
  gap: .75rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: .9rem;
}
.stat-num{
  font-size: 2rem;
  font-weight: 900;
}
.stat-label{ color: var(--muted); font-weight: 600; }

.checklist{ margin: 0; padding-left: 1.1rem; color: var(--muted); }
.checklist li{ margin: .4rem 0; }

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding: .75rem 1rem;
  border-radius: 14px;
  font-weight: 700;
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform .05s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
}
.btn:hover{ transform: translateY(-1px); text-decoration:none; }
.btn:active{ transform: translateY(0); }
.btn.full{ width:100%; }

.btn.primary{
  background: linear-gradient(135deg, rgba(14,165,233,.95), rgba(14,165,233,.72));
  color: #041018;
}
.btn.secondary{
  background: rgba(255,255,255,.06);
  border-color: var(--border);
  color: var(--text);
}
.btn.ghost{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

/* Sections */
.section{
  padding: 2.2rem 0;
}
.section.alt{
  background: rgba(255,255,255,.03);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head{
  margin-bottom: 1.2rem;
}
.section-head h2{
  margin: 0 0 .3rem;
  font-size: clamp(1.5rem, 2.3vw, 2rem);
}
.section-head p{
  margin:0;
  color: var(--muted);
  max-width: 85ch;
}

.grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.card{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius2);
  padding: 1rem 1.05rem;
}
.card h3{ margin: 0 0 .6rem; }
.card p, .card li{ color: var(--muted); }
.card ol, .card ul{ padding-left: 1.15rem; margin: .5rem 0 0; }
.card li{ margin: .35rem 0; }

.callout{
  margin-top: 1rem;
  border: 1px solid rgba(34,197,94,.35);
  background: rgba(34,197,94,.08);
  border-radius: var(--radius2);
  padding: .9rem 1rem;
  color: var(--muted);
}
.callout strong{ color: var(--text); }

/* Accordion */
.accordion{
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  overflow: hidden;
  background: rgba(255,255,255,.03);
}
.accordion-btn{
  width:100%;
  text-align:left;
  padding: .9rem 1rem;
  border:0;
  background: transparent;
  color: var(--text);
  font-weight: 700;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 1rem;
}
.accordion-btn::after{
  content:"+";
  font-size: 1.2rem;
  opacity: .9;
}
.accordion-btn[aria-expanded="true"]::after{ content:"–"; }
.accordion-panel{
  padding: 0 1rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
  border-top: 1px solid var(--border);
}
.accordion-panel p{
  margin: .85rem 0;
  color: var(--muted);
}

/* CTA */
.cta{
  margin-top: 1.4rem;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(14,165,233,.14), rgba(34,197,94,.10));
  border-radius: var(--radius);
  padding: 1.1rem 1.1rem;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 1rem;
}
.cta h3{ margin: 0 0 .3rem; }
.cta p{ margin: 0; color: var(--muted); }
.cta-actions{ display:flex; gap: .7rem; flex-wrap: wrap; }

/* Footer */
.site-footer{
  padding: 2rem 0 1.4rem;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,.12);
}
.footer-inner{
  display:grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--border);
}
.footer-title{ font-weight: 800; margin-bottom: .35rem; }
.footer-list{ list-style:none; margin:0; padding:0; color: var(--muted); }
.footer-list li{ margin:.35rem 0; }
.footer-list a{ color: var(--text); }

.footer-bottom{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
}
.muted{ color: var(--muted); }
.to-top{
  color: var(--muted);
  font-weight: 700;
}
.to-top:hover{ color: var(--text); text-decoration:none; }

/* WhatsApp FAB */
.wa-fab{
  position: fixed;
  right: 16px;
  bottom: 16px;
  display:flex;
  align-items:center;
  gap: .6rem;
  padding: .75rem .9rem;
  background: rgba(34,197,94,.92);
  color: #05140a;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.25);
  box-shadow: var(--shadow);
  z-index: 120;
}
.wa-fab:hover{ text-decoration:none; opacity: .95; }
.wa-text{ font-weight: 900; }
.wa-icon{
  width: 34px; height: 34px;
  border-radius: 999px;
  display:grid; place-items:center;
  background: rgba(255,255,255,.22);
}

/* Responsive */
@media (max-width: 900px){
  .hero-inner{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr; }
}

@media (max-width: 760px){
  .nav-toggle{ display:inline-flex; }
  .site-nav{
    position:absolute;
    left: 0;
    right: 0;
    top: 64px;
    margin: 0 auto;
    width: min(var(--container), calc(100% - 2rem));
    display:none;
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;
    padding: .6rem;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(11,18,32,.92);
    backdrop-filter: blur(10px);
  }
  .site-nav a{ padding: .7rem .8rem; }
  .site-nav.open{ display:flex; }
  .grid{ grid-template-columns: 1fr; }
  .cta{ flex-direction: column; align-items: flex-start; }
  .footer-bottom{ flex-direction: column; align-items: flex-start; }
  .wa-text{ display:none; } /* solo ícono en pantallas pequeñas */
  .wa-fab{ padding: .75rem; }
}