:root{
  --blue:#2E7DF0; --blue-dk:#1B5FCB; --ink:#152036; --muted:#5a6478;
  --bg:#ffffff; --bg2:#f4f7fb; --gold:#ffd60a; --wa:#25d366;
  --line:#e6ebf2; --radius:16px; --shadow:0 8px 30px rgba(20,40,80,.10);
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;border:0;cursor:pointer;
  font-weight:800;font-size:1rem;padding:.8rem 1.3rem;border-radius:999px;transition:.15s;white-space:nowrap}
.btn--primary{background:var(--blue);color:#fff}
.btn--primary:hover{background:var(--blue-dk)}
.btn--ghost{background:#fff;color:var(--blue);box-shadow:inset 0 0 0 2px var(--blue)}
.btn--wa{background:var(--wa);color:#fff}
.btn--wa:hover{filter:brightness(.95)}
.btn--big{width:100%;padding:1rem;font-size:1.1rem;margin-top:.8rem}

/* nav */
.nav{position:sticky;top:0;z-index:40;
  padding:.5rem clamp(1rem,4vw,2rem);background:rgba(255,255,255,.97);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
.nav__row{display:flex;align-items:center;gap:1rem}
.nav__brand img{height:38px;width:auto}
.section,.hero{scroll-margin-top:118px}
.nav__links{display:none;gap:1.4rem;margin-left:auto;font-weight:700;color:var(--muted)}
.nav__links a:hover{color:var(--blue)}
.nav__wa{margin-left:auto;padding:.55rem 1rem;font-size:.95rem}
@media(min-width:820px){
  .nav__links{display:flex}
  .nav__wa{margin-left:0}
}

/* hero */
.hero{max-width:var(--max);margin:0 auto;padding:clamp(1.5rem,5vw,3.5rem) clamp(1rem,4vw,2rem);
  display:grid;gap:1.6rem;align-items:center}
@media(min-width:820px){.hero{grid-template-columns:1.05fr .95fr;gap:2.5rem}}
.hero__tag{display:inline-block;background:#eaf1fe;color:var(--blue-dk);font-weight:800;
  padding:.35rem .8rem;border-radius:999px;font-size:.85rem}
.hero h1{font-size:clamp(2rem,6.5vw,3.3rem);line-height:1.08;margin:.7rem 0}
.hero h1 span{color:var(--blue)}
.hero p{color:var(--muted);font-size:1.08rem;max-width:44ch}
.hero__btns{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.2rem}
.hero__img img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow);object-fit:cover;aspect-ratio:4/3}

/* promo */
.promo{background:var(--gold);color:#3a2c00;font-weight:800;text-align:center;
  padding:.8rem 1rem;font-size:1.02rem}

/* sections */
.section{max-width:var(--max);margin:0 auto;padding:clamp(2rem,6vw,3.6rem) clamp(1rem,4vw,2rem)}
.section--alt{background:var(--bg2);max-width:none}
.section--alt>*{max-width:var(--max);margin-left:auto;margin-right:auto}
.section__title{font-size:clamp(1.6rem,5vw,2.3rem);text-align:center;margin:0 0 .3rem}
.section__sub{text-align:center;color:var(--muted);margin:0 auto 1.6rem;max-width:52ch}

/* tabs (en el header) */
.nav__cats{display:flex;gap:.45rem;flex-wrap:wrap;justify-content:center;margin:.5rem 0 0}
.tab{border:2px solid var(--blue);cursor:pointer;font-weight:800;padding:.42rem 1rem;border-radius:999px;
  font-size:.9rem;background:#eaf1fe;color:var(--blue-dk);
  animation:tabPulse 1.4s ease-in-out infinite;will-change:transform}
.tab:nth-child(2){animation-delay:.18s}
.tab:nth-child(3){animation-delay:.36s}
.tab:nth-child(4){animation-delay:.54s}
.tab:hover{background:#dbe8ff}
.tab.is-active{background:var(--blue);color:#fff;animation:none;box-shadow:0 6px 18px rgba(46,125,240,.35)}
@keyframes tabPulse{
  0%,100%{transform:scale(1);box-shadow:0 0 0 0 rgba(46,125,240,.4)}
  50%{transform:scale(1.07);box-shadow:0 6px 18px 0 rgba(46,125,240,.4)}
}
/* badges hero */
.hero__badges{display:flex;gap:.55rem;flex-wrap:wrap;margin-top:1rem}
.badge-alert{display:inline-flex;align-items:center;gap:.4rem;background:var(--wa);color:#fff;
  font-weight:900;padding:.6rem 1.05rem;border-radius:12px;font-size:1.02rem;
  box-shadow:0 6px 18px rgba(37,211,102,.45);animation:alertPulse 1.25s ease-in-out infinite}
.badge-soft{display:inline-flex;align-items:center;gap:.4rem;background:#fff6d6;color:#7a5c00;
  font-weight:800;padding:.6rem 1.05rem;border-radius:12px;font-size:1rem;border:1px solid #ffe083}
@keyframes alertPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}
@media(prefers-reduced-motion:reduce){.tab,.badge-alert{animation:none}}

/* grid */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(.7rem,2vw,1.3rem)}
@media(min-width:640px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(min-width:960px){.grid{grid-template-columns:repeat(4,1fr)}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:0 3px 14px rgba(20,40,80,.05)}
.card img{width:100%;aspect-ratio:3/4;object-fit:cover;background:#eef2f8}
.card__b{padding:.7rem .8rem .9rem;display:flex;flex-direction:column;gap:.15rem;flex:1}
.card__ref{font-size:.72rem;font-weight:800;color:var(--blue);letter-spacing:.02em}
.card__name{font-weight:800;font-size:.98rem}
.card__size{margin:.4rem 0 .5rem;padding:.5rem;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:.85rem;background:#fff}
.card .btn{margin-top:auto;padding:.55rem;font-size:.92rem}

/* qty steppers */
.qty{display:flex;align-items:center;gap:.4rem}
.qty__b{width:28px;height:28px;border:1px solid var(--line);background:#fff;border-radius:8px;font-size:1.1rem;font-weight:800;cursor:pointer;line-height:1;color:var(--blue)}
.qty span{min-width:18px;text-align:center;font-weight:800}

/* toast */
.toast{position:fixed;left:50%;bottom:84px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:.7rem 1.1rem;border-radius:999px;font-weight:800;
  box-shadow:0 8px 24px rgba(0,0,0,.25);opacity:0;pointer-events:none;transition:.22s;z-index:60;font-size:.95rem}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* single-column order */
.order--single{max-width:640px;margin:0 auto}
.order--single .order__cart{grid-column:1/-1}

/* why */
.why{display:grid;gap:1rem;grid-template-columns:1fr}
@media(min-width:640px){.why{grid-template-columns:repeat(2,1fr)}}
@media(min-width:960px){.why{grid-template-columns:repeat(4,1fr)}}
.why__card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem;text-align:center}
.why__ic{font-size:2rem}
.why__card h3{margin:.4rem 0 .3rem}
.why__card p{color:var(--muted);margin:0;font-size:.95rem}

/* order */
.order{display:grid;gap:1.3rem}
@media(min-width:820px){.order{grid-template-columns:1fr 1fr;align-items:start}}
.order__form,.order__cart{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.2rem;box-shadow:0 3px 14px rgba(20,40,80,.05)}
.order__form{display:flex;flex-direction:column;gap:.8rem}
label{font-weight:700;font-size:.9rem;display:flex;flex-direction:column;gap:.3rem;color:var(--ink)}
select,input[type=number],input[type=text]{font:inherit;padding:.7rem;border:1px solid var(--line);
  border-radius:10px;background:#fff;color:var(--ink)}
.order__price{font-size:1.3rem;font-weight:900;color:var(--blue);text-align:center}
.order__cart h3{margin:.1rem 0 .8rem}
.cart{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.5rem}
.cart__empty{color:var(--muted);font-size:.95rem}
.cart li.item{display:flex;gap:.5rem;align-items:center;border:1px solid var(--line);border-radius:10px;padding:.5rem .6rem}
.item__t{flex:1;font-size:.9rem;line-height:1.25}
.item__t b{display:block;font-size:.95rem}
.item__price{font-weight:800;white-space:nowrap}
.item__del{border:0;background:#fdeaea;color:#c0392b;cursor:pointer;border-radius:8px;padding:.35rem .5rem;font-size:1rem}
.chk{flex-direction:row;align-items:center;gap:.5rem;margin:1rem 0 .3rem;font-weight:700}
.order__rows{border-top:1px dashed var(--line);padding-top:.7rem;margin-top:.3rem;display:flex;flex-direction:column;gap:.35rem}
.order__rows>div{display:flex;justify-content:space-between;font-size:.98rem;color:var(--muted)}
.order__rows b{color:var(--ink)}
.order__total{font-size:1.25rem;border-top:1px solid var(--line);padding-top:.5rem;margin-top:.2rem}
.order__total b{color:var(--blue)}
.ship-note{font-size:.82rem;color:var(--muted);margin:.5rem 0 0}
.order__data{display:grid;gap:.6rem;margin-top:.9rem}
@media(min-width:520px){.order__data{grid-template-columns:1fr 1fr}}

/* footer */
.foot{background:var(--ink);color:#cdd6e6;text-align:center;padding:2.2rem 1rem;display:flex;
  flex-direction:column;align-items:center;gap:.7rem;margin-top:1rem}
.foot img{height:44px;width:auto;filter:brightness(0) invert(1);opacity:.95}
.foot__mini{font-size:.8rem;opacity:.7;margin:.4rem 0 0}

/* fab */
.fab{position:fixed;right:16px;bottom:16px;z-index:50;width:56px;height:56px;border-radius:50%;
  background:var(--wa);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 20px rgba(0,0,0,.25)}