:root{
  --bg:#f7f8fb;
  --surface:#fff;
  --text:#0f172a;
  --muted:#64748b;
  --primary:#1c64f2;
  --accent:#f97316;
  --r-lg:20px;
  --r-md:14px;
  --shadow:0 16px 40px -28px rgba(15,23,42,.25);
  --max:1100px;
  --gap:18px;
}

/* Base mobile-first */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--r-lg)}

/* Contenedor fluido móvil */
.container{width:min(100% - 28px, var(--max));margin-inline:auto}

/* Header compacto y fijo */
.site-header{
  position: sticky; top: 0; z-index: 1000;
  background:rgba(247,248,251,.92); backdrop-filter:saturate(120%) blur(10px);
  border-bottom:1px solid rgba(148,163,184,.18);
}

.header-content{display:flex;align-items:center;justify-content:space-between;padding:10px 0;gap:10px}
.brand{display:flex;align-items:center;gap:20px}
.brand-mark{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:radial-gradient(circle at 30% 30%, #fff 0%, #dbeafe 100%);font-size:16px}
.brand-title{margin:0;font-weight:700}
.brand-subtitle{margin:0;color:var(--muted);font-size:.9rem}

/* Botón – touch friendly */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 16px;border-radius:999px;border:0;cursor:pointer;text-decoration:none;
  font-weight:600;min-height:44px; /* accesible en móvil */
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 26px -20px rgba(28,100,242,.9)}
.btn-secondary{background:rgba(28,100,242,.12);color:var(--primary)}

/* HERO móvil: una columna, tipografía fluida */
.hero{padding:28px 0 36px}
.greeting{color:var(--accent);font-weight:700;letter-spacing:.3px;margin:0 0 8px;text-transform:uppercase}
h1{font-size:clamp(1.6rem, 4.5vw + .8rem, 2.6rem);line-height:1.15;margin:0 0 10px}
.lead{color:var(--muted);margin:0 0 16px;font-size:1rem}
.hero-actions{display:grid;gap:10px}
.hero-portrait{margin:18px 0 0;position:relative}
.hero-portrait img{width:100%;aspect-ratio:4/5;object-fit:cover;box-shadow:var(--shadow)}
.hero-portrait::before{
  content:"";position:absolute;inset:-12px;
  border-radius:calc(var(--r-lg) * 1.15);
  background:linear-gradient(160deg, rgba(28,100,242,.15), rgba(249,115,22,.12));
  z-index:-1;
}

/* Secciones */
section{padding:36px 0}
h2{font-size:clamp(1.3rem, 3.5vw + .5rem, 2rem);margin:0 0 14px}
.about-grid,.step-grid{display:grid;gap:12px}
.about-card,.step-card,.testimonial{
  background:var(--surface);padding:18px;border-radius:var(--r-md);box-shadow:var(--shadow)
}
.step-number{font-weight:800}

/* CTA final */
.cta{background:var(--text);color:#fff;padding:36px 0 44px}
.cta p{color:rgba(255,255,255,.85)}
.cta-links{display:grid;gap:10px}
.cta .btn-primary{background:#fff;color:var(--text);box-shadow:none}
.cta .btn-secondary{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.25)}

/* Footer */
.site-footer{background:#0b1220;color:rgba(255,255,255,.75);padding:22px 0 28px}
.footer-content{display:grid;gap:6px}
.footer-content a{color:#fff;text-decoration:none}

/* Botón flotante WhatsApp (opcional) */
.fab-whatsapp{
  position:fixed; right:14px; bottom:14px; z-index:1100;
  width:56px;height:56px;border-radius:50%; display:grid;place-items:center;
  background:#25D366; color:#fff; text-decoration:none; font-size:24px;
  box-shadow:0 12px 30px -12px rgba(0,0,0,.35)
}

/* --------- Mejora para tablets/desktop --------- */
@media (min-width: 768px){
  .container{width:min(100% - 48px, var(--max))}
  .hero{padding:48px 0 64px}
  .hero-actions{grid-auto-flow:column;justify-content:start}
  .cta-links{grid-auto-flow:column;justify-content:start}
}

@media (min-width: 960px){
  .hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
  .hero-portrait{margin:0}
  h1{font-size:clamp(2rem, 2.3vw + 1rem, 3.1rem)}
  .about-grid{grid-template-columns:repeat(3,1fr);gap:18px}
  .step-grid{grid-template-columns:repeat(3,1fr);gap:18px}
  .footer-content{grid-template-columns:1fr auto;align-items:center}
/* ===== Steps (timeline) – mobile-first ===== */
.steps { padding: 36px 0 }
.steps h2 { margin-bottom: 18px }

.steps-list {
  display: grid;
  gap: 14px;
  position: relative;
  padding-left: 6px; /* riel */
}

/* Riel vertical del timeline */
.steps-list::before {
  content:"";
  position: absolute;
  left: 22px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(28,100,242,.25), rgba(28,100,242,.05));
}

/* Tarjeta paso */
.step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  background: var(--surface);
  padding: 16px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  position: relative;
}

/* Medalla numerada */
.step-badge {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 800; color: var(--text);
  background: radial-gradient(120% 120% at 30% 20%, #fff 0%, #dbeafe 55%, #bfdbfe 100%);
  box-shadow: 0 8px 18px -12px rgba(28,100,242,.45);
  z-index: 1;
}

/* Conector del riel a la tarjeta */
.step::before {
  content:"";
  position:absolute;
  left: 22px;
  top: 44px; /* justo bajo la medalla */
  width: 2px;
  height: calc(100% - 44px);
  background: linear-gradient(180deg, rgba(28,100,242,.18), rgba(28,100,242,0));
}
.step:last-child::before { display:none; }

.step-body h3 {
  margin: 2px 0 6px;
  font-size: 1.05rem;
  line-height: 1.25;
}
.step-body p { margin: 0; color: var(--muted); }

/* CTA bajo los pasos */
.steps-cta {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

@media (max-width: 390px){
  .btn{ padding: 10px 14px; font-size: .95rem; }
  :root{ --header-height: 64px; } /* si usas la opción A */
}

/* Mejoras en pantallas medias/grandes */
@media (min-width: 960px){
  .steps { padding: 64px 0 }
  .steps-list { gap: 18px; padding-left: 10px }
  .step {
    grid-template-columns: 52px 1fr;
    padding: 20px; border-radius: 18px;
  }
  .step-badge { width: 52px; height: 52px; font-size: 1.05rem }
  .steps-cta { grid-auto-flow: column; justify-content: start }
}