/* ==========================================================================
   GutLab · Capa de interfaz — sistema visual
   --------------------------------------------------------------------------
   Se carga LA ÚLTIMA a propósito: refina lo que ya existe sin reescribirlo.
   Aquí vive lo que antes estaba disperso en 154 estilos en línea.
   ========================================================================== */

:root{
  /* Escala de espaciado — múltiplos de 4, un solo criterio para todo */
  --sp-1:4px;  --sp-2:8px;  --sp-3:12px; --sp-4:16px; --sp-5:24px;
  --sp-6:32px; --sp-7:40px; --sp-8:56px; --sp-9:72px; --sp-10:96px;

  /* Escala tipográfica fluida: se adapta al ancho sin media queries */
  --fs-display: clamp(34px, 5.2vw, 54px);
  --fs-h2:      clamp(26px, 3.4vw, 38px);
  --fs-h3:      clamp(19px, 2.1vw, 23px);
  --fs-lead:    clamp(15px, 1.5vw, 17.5px);
  --fs-body:    15px;
  --fs-sm:      13.5px;
  --fs-xs:      12px;

  /* Elevación — tres niveles, no diez */
  --sh-sm: 0 1px 2px rgba(15,43,77,.06), 0 2px 8px rgba(15,43,77,.05);
  --sh-md: 0 4px 12px rgba(15,43,77,.07), 0 12px 28px rgba(15,43,77,.06);
  --sh-lg: 0 12px 32px rgba(15,43,77,.10), 0 28px 64px rgba(15,43,77,.08);

  --r-sm:10px; --r-md:14px; --r-lg:20px; --r-xl:28px;
  --ring: 0 0 0 3px rgba(14,159,202,.35);
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* --------------------------------------------------------------------------
   1. ACCESIBILIDAD
   -------------------------------------------------------------------------- */

/* Salto al contenido: primer tabulador para quien navega con teclado */
.skip-link{position:absolute;left:-9999px;top:0;z-index:400;background:var(--navy);
  color:#fff;padding:12px 20px;border-radius:0 0 var(--r-sm) 0;font-weight:700;font-size:14px;}
.skip-link:focus{left:0;}

/* Anillo de foco visible solo con teclado, nunca con ratón */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible, summary:focus-visible,
[tabindex]:focus-visible{outline:none;box-shadow:var(--ring);border-radius:var(--r-sm);}

/* El ancla de cada sección no queda tapada por la barra fija */
section[id]{scroll-margin-top:84px;}

/* --------------------------------------------------------------------------
   2. RITMO DE SECCIÓN Y ENCABEZADOS
   Sustituye a los 21 <h2 style="..."> del marcado.
   -------------------------------------------------------------------------- */

.section{padding:clamp(56px,7vw,96px) 0;}
.section--alt{background:var(--bg);}
.section--edge{border-top:1px solid var(--border);}
.section--tint{background:linear-gradient(180deg,var(--bg),#EFF4FF);}

.section-head{max-width:640px;margin-bottom:var(--sp-7);}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{font-size:var(--fs-h2);letter-spacing:-.4px;margin-bottom:var(--sp-3);}
.section-head .lead{font-size:var(--fs-lead);color:var(--muted);line-height:1.65;}
.section-head .lead + .lead{margin-top:var(--sp-3);}

/* --------------------------------------------------------------------------
   3. NAVEGACIÓN
   -------------------------------------------------------------------------- */

/* Progreso de lectura: una línea fina que crece con el scroll */
.read-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:120;
  background:linear-gradient(90deg,var(--cyan),var(--purple));
  transition:width .1s linear;pointer-events:none;}

.topnav{transition:box-shadow .25s var(--ease), background .25s var(--ease);}
.topnav.is-stuck{box-shadow:var(--sh-sm);background:rgba(255,255,255,.97);}

/* Sección activa resaltada en el menú */
.nav-links a{position:relative;padding:6px 2px;}
.nav-links a::after{content:'';position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--cyan);border-radius:2px;transition:right .28s var(--ease);}
.nav-links a:hover::after,
.nav-links a.is-active::after{right:0;}
.nav-links a.is-active{color:var(--navy);}

/* Botón hamburguesa: solo aparece en pantallas pequeñas */
.nav-toggle{display:none;width:42px;height:42px;border-radius:var(--r-sm);
  background:transparent;border:1.5px solid var(--border);cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;padding:0;}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--navy);
  border-radius:2px;transition:transform .3s var(--ease), opacity .2s;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* Cajón de navegación móvil */
.nav-drawer{position:fixed;inset:0;z-index:150;display:none;}
.nav-drawer.open{display:block;}
.nav-drawer-scrim{position:absolute;inset:0;background:rgba(15,43,77,.45);
  backdrop-filter:blur(3px);animation:fadeIn .2s var(--ease);}
.nav-drawer-panel{position:absolute;top:0;right:0;bottom:0;width:min(340px,86vw);
  background:#fff;box-shadow:var(--sh-lg);padding:var(--sp-5);overflow-y:auto;
  animation:slideIn .28s var(--ease);display:flex;flex-direction:column;}
.nav-drawer-head{display:flex;justify-content:space-between;align-items:center;
  margin-bottom:var(--sp-5);padding-bottom:var(--sp-4);border-bottom:1px solid var(--border);}
.nav-drawer-close{width:36px;height:36px;border-radius:var(--r-sm);border:none;
  background:var(--bg);color:var(--navy);font-size:17px;cursor:pointer;}
.nav-drawer a.nav-drawer-link{display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;font-size:15.5px;font-weight:600;color:var(--navy);
  border-bottom:1px solid var(--border);}
.nav-drawer a.nav-drawer-link span{color:var(--muted);font-size:13px;}
.nav-drawer a.nav-drawer-link:hover{color:var(--cyan);}
.nav-drawer-actions{margin-top:auto;padding-top:var(--sp-5);display:flex;
  flex-direction:column;gap:var(--sp-3);}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideIn{from{transform:translateX(100%)}to{transform:none}}

@media(max-width:900px){
  .nav-toggle{display:flex;}
}

/* --------------------------------------------------------------------------
   4. APARICIÓN AL HACER SCROLL
   Sutil: 12px y opacidad. Nada que maree ni retrase la lectura.
   -------------------------------------------------------------------------- */

.reveal{opacity:0;transform:translateY(12px);
  transition:opacity .55s var(--ease), transform .55s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* Quien pidió menos movimiento, no ve ninguno */
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  .nav-drawer-panel,.nav-drawer-scrim{animation:none;}
  html{scroll-behavior:auto;}
  *{transition-duration:.01ms !important;}
}

/* --------------------------------------------------------------------------
   5. TARJETAS VISUALES
   Sustituyen a los recuadros "FOTO PENDIENTE": composiciones de gradiente
   e icono que se ven intencionales mientras no haya fotografía real.
   -------------------------------------------------------------------------- */

.visual-card{position:relative;border-radius:var(--r-lg);overflow:hidden;
  min-height:280px;display:flex;align-items:flex-end;padding:var(--sp-5);
  background:linear-gradient(140deg,var(--navy-dk),var(--navy) 55%,#1a4e85);
  box-shadow:var(--sh-md);isolation:isolate;}
.visual-card::before{content:'';position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(420px 260px at 78% 12%, rgba(14,159,202,.34), transparent 70%),
    radial-gradient(320px 220px at 12% 88%, rgba(109,40,217,.28), transparent 72%);}
/* Trama de puntos: da textura sin necesitar una imagen */
.visual-card::after{content:'';position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
  background-size:18px 18px;
  mask-image:linear-gradient(160deg,#000,transparent 72%);
  -webkit-mask-image:linear-gradient(160deg,#000,transparent 72%);}
.visual-card--light{background:linear-gradient(140deg,#EFF4FF,#F8FAFC);}
.visual-card--light::before{
  background:
    radial-gradient(380px 240px at 80% 15%, rgba(14,159,202,.20), transparent 70%),
    radial-gradient(300px 200px at 10% 85%, rgba(109,40,217,.14), transparent 72%);}
.visual-card--light .vc-title{color:var(--navy);}
.visual-card--light .vc-text{color:var(--muted);}
.visual-card--light .vc-mark{background:rgba(24,62,109,.08);color:var(--navy);}

.vc-mark{position:absolute;top:var(--sp-5);left:var(--sp-5);width:52px;height:52px;
  border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;
  font-size:24px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(4px);}
.vc-body{position:relative;}
.vc-title{font-size:var(--fs-h3);font-weight:700;color:#fff;line-height:1.3;margin-bottom:6px;}
.vc-text{font-size:var(--fs-sm);color:rgba(255,255,255,.74);line-height:1.6;max-width:38ch;}

/* --------------------------------------------------------------------------
   6. PESTAÑAS DE CONTENIDO
   Permiten unir en una sola sección lo que antes eran dos.
   -------------------------------------------------------------------------- */

.tabs{display:inline-flex;gap:4px;padding:5px;background:var(--bg);
  border:1px solid var(--border);border-radius:99px;margin-bottom:var(--sp-6);}
.tab-btn{border:none;background:transparent;border-radius:99px;padding:10px 22px;
  font-size:14px;font-weight:700;color:var(--muted);cursor:pointer;transition:.2s var(--ease);}
.tab-btn:hover{color:var(--navy);}
.tab-btn.on{background:#fff;color:var(--navy);box-shadow:var(--sh-sm);}
.tab-panel{display:none;animation:fadeIn .3s var(--ease);}
.tab-panel.on{display:block;}

/* --------------------------------------------------------------------------
   7. REFINADO DE COMPONENTES EXISTENTES
   -------------------------------------------------------------------------- */

.svc-card,.toma-card,.quick-card,.step-card,.process-step{
  border-radius:var(--r-md);transition:transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s;}
.svc-card:hover,.toma-card:hover,.quick-card:hover{
  transform:translateY(-3px);box-shadow:var(--sh-md);}

.portal-card{border-radius:var(--r-lg);}
.portal-card:hover{box-shadow:var(--sh-lg);}

.btn-primary,.btn-cyan,.btn-navy{box-shadow:var(--sh-sm);}
.btn-primary:active,.btn-cyan:active,.btn-navy:active{transform:translateY(1px);}

.hero h1{font-size:var(--fs-display);letter-spacing:-.8px;}
.hero-sub{font-size:var(--fs-lead);}


/* Preguntas frecuentes con más aire */
.faq-item{padding:var(--sp-4) 0;}
.faq-item summary{padding:2px 0;}
.faq-item[open] summary{color:var(--cyan);}

/* Pie: rejilla explícita en vez de flex con saltos */
footer .container{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;
  gap:var(--sp-6);align-items:start;}
@media(max-width:820px){
  footer .container{grid-template-columns:1fr 1fr;}
}
@media(max-width:520px){
  footer .container{grid-template-columns:1fr;}
}

/* Subtítulo dentro de una sección que agrupa varios bloques.
   Conserva los títulos de las secciones que se fusionaron. */
.sub-head{max-width:620px;margin-bottom:var(--sp-5);}
.sub-head h3{font-size:var(--fs-h3);margin-bottom:var(--sp-2);letter-spacing:-.2px;}
.sub-head .lead{font-size:var(--fs-body);color:var(--muted);line-height:1.65;}
.sub-head + .tabs{margin-top:var(--sp-2);}