/* ═══════════════════════════════════════════════════════
   Sello de la NOM-004 (portada): botón, recuadro con animación al pasar el cursor, ventana en celular y tarjeta ancha de «Funciones».
   Va en su propio archivo para que se cargue siempre completo junto con index.html.
═══════════════════════════════════════════════════════ */
.f-half{grid-column:span 3}
@media (max-width:900px){.f-half{grid-column:auto}}

/* Sello de cumplimiento NOM-004 (arriba del título principal) */
.nom-sello{font:inherit;text-align:left;cursor:default;display:inline-flex;align-items:center;gap:12px;max-width:100%;margin-bottom:20px;padding:7px 20px 7px 7px;border-radius:999px;background:var(--primary-dark);color:#fff;text-decoration:none;box-shadow:0 6px 18px rgba(29,78,216,.25);transition:transform .15s ease,box-shadow .15s ease}
.nom-sello:hover,.nom-sello:focus-visible{transform:translateY(-2px);box-shadow:0 10px 24px rgba(29,78,216,.34)}
.nom-sello{border:0}
.nom-sello svg{flex:none;width:36px;height:36px;padding:7px;border-radius:50%;background:#fff;stroke:var(--primary-dark);stroke-width:2.2}
.nom-sello>span{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.nom-sello strong{font-family:var(--display);font-weight:800;font-size:16px;letter-spacing:-0.005em}
.nom-sello small{font-size:13px;color:var(--primary-100);margin-top:1px}
.nom-sello strong{white-space:nowrap}
@media (max-width:420px){.nom-sello strong{font-size:13.5px}.nom-sello{padding-right:14px;gap:10px}}
@media (max-width:350px){.nom-sello strong{white-space:normal}.nom-sello .nb{white-space:nowrap}}

/* Recuadro con la explicación de la NOM-004 (computadora: al pasar el cursor) */
.nom-wrap{position:relative;z-index:5;display:inline-block;margin-bottom:20px;max-width:100%}
.nom-wrap .nom-sello{margin-bottom:0}
.nom-tip{display:block;position:absolute;left:0;top:100%;width:min(400px,86vw);padding-top:12px;opacity:0;visibility:hidden;transform:translateY(10px) scale(.97);transform-origin:20px 0;transition:opacity .22s ease,transform .26s cubic-bezier(.2,.8,.2,1),visibility 0s linear .26s;pointer-events:none}
.nom-tip .nom-info{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 22px;box-shadow:0 18px 44px rgba(15,23,42,.18)}
.nom-tip .nom-info::before{content:"";position:absolute;top:-8px;left:34px;width:14px;height:14px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line);transform:rotate(45deg)}
.nom-info h3{font-size:20px;margin-bottom:8px;color:var(--ink)}
.nom-info p{font-size:15.5px;line-height:1.5;color:var(--ink-soft);margin:0 0 10px}
.nom-info p strong{color:var(--ink)}
.nom-info ul{list-style:none;margin:0 0 12px;padding:0;display:grid;gap:8px}
.nom-info li{position:relative;padding-left:24px;font-size:15px;line-height:1.45;color:var(--ink)}
.nom-info li::before{content:"";position:absolute;left:0;top:3px;width:16px;height:16px;border-radius:50%;background:var(--primary-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231d4ed8' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center/11px no-repeat}
.nom-info .nom-fin{margin:0;font-weight:700;color:var(--primary-dark);font-size:15px}
@media (hover:hover){
  .nom-wrap:hover .nom-tip,.nom-wrap:has(.nom-sello:focus-visible) .nom-tip{opacity:1;visibility:visible;transform:none;transition-delay:0s;pointer-events:auto}
}
/* Celular o tableta: el recuadro no se muestra, se abre la ventana al tocar */
@media (hover:none){.nom-tip{display:none}}

.nom-modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:20px;background:rgba(15,23,42,.55);opacity:0;transition:opacity .22s ease}
.nom-modal[hidden]{display:none}
.nom-modal.on{opacity:1}
.nom-modal-caja{position:relative;width:min(440px,100%);max-height:calc(100dvh - 40px);overflow:auto;background:#fff;border-radius:20px;padding:26px 22px 22px;box-shadow:0 24px 60px rgba(15,23,42,.35);transform:translateY(24px) scale(.96);transition:transform .28s cubic-bezier(.2,.8,.2,1)}
.nom-modal.on .nom-modal-caja{transform:none}
.nom-modal-ico{width:52px;height:52px;border-radius:50%;background:var(--primary-100);display:grid;place-items:center;margin:0 auto 12px}
.nom-modal-ico svg{width:30px;height:30px;stroke:var(--primary-dark);stroke-width:2.2}
.nom-modal .nom-info h3{text-align:center;font-size:22px}
.nom-modal .nom-cerrar{width:100%;margin-top:16px}
@media (prefers-reduced-motion:reduce){.nom-tip,.nom-modal,.nom-modal-caja{transition:none}}

/* Tarjetas de «Funciones»: el texto no se selecciona y el cursor se queda normal */
.f,.f *{-webkit-user-select:none;user-select:none;cursor:default}