/* ==========================================================================
   BENTOSAN · Climatización y Refrigeración — estilos
   Mobile-first. Paleta: azul profundo, celeste frío, gris acero, blanco.
   ========================================================================== */
:root {
  --azul: #0B2A4A;
  --azul-2: #123A63;
  --azul-3: #1B4C7E;
  --celeste: #35A7E8;
  --celeste-osc: #1677B8;   /* celeste con contraste AA sobre blanco */
  --acero: #8A97A6;
  --acero-osc: #5B6878;
  --tinta: #13263B;
  --texto: #3C4B5C;
  --gris: #F2F5F8;
  --gris-2: #E3E9EF;
  --blanco: #fff;
  --wa: #1FAF54;
  --wa-osc: #178A42;
  --radio: 16px;
  --sombra: 0 1px 2px rgba(11, 42, 74, .06), 0 8px 24px rgba(11, 42, 74, .08);
  --t: "Montserrat", "Segoe UI", system-ui, sans-serif;
  --b: "Inter", "Segoe UI", system-ui, sans-serif;
  --top-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--top-h) + 8px); -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 400 1rem/1.6 var(--b); color: var(--texto); background: var(--blanco); overflow-x: hidden; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3 { font-family: var(--t); color: var(--tinta); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.01em; }
h2 { font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.4rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 700; }
p { margin: 0 0 1em; }
a { color: var(--celeste-osc); }
.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.ic { width: 1.25em; height: 1.25em; flex: none; }
[hidden] { display: none !important; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--azul); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--celeste); outline-offset: 2px; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55em;
  font: 600 1rem/1.2 var(--b); text-decoration: none; text-align: center;
  padding: .85em 1.25em; border-radius: 12px; border: 2px solid transparent; cursor: pointer;
  transition: background-color .2s, border-color .2s, transform .2s, box-shadow .2s;
  min-height: 48px;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: none; }
.btn--lg { font-size: 1.05rem; padding: 1em 1.4em; min-height: 54px; }
.btn--sm { padding: .55em .9em; min-height: 42px; font-size: .95rem; }
.btn--wa { background: var(--wa); color: #fff; box-shadow: 0 6px 18px rgba(31, 175, 84, .28); }
.btn--wa:hover { background: var(--wa-osc); }
.btn--azul { background: var(--azul); color: #fff; }
.btn--azul:hover { background: var(--azul-3); }
.btn--ghost { border-color: rgba(255, 255, 255, .55); color: #fff; background: rgba(255, 255, 255, .04); }
.btn--ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .1); }

/* ---------- Header ---------- */
.top { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .96); border-bottom: 1px solid transparent; transition: border-color .2s, box-shadow .2s; }
@supports (backdrop-filter: blur(8px)) { .top { background: rgba(255, 255, 255, .86); backdrop-filter: saturate(1.4) blur(10px); } }
.top.is-scrolled { border-color: var(--gris-2); box-shadow: 0 4px 16px rgba(11, 42, 74, .06); }
.top__in { display: flex; align-items: center; gap: 12px; height: var(--top-h); }
.top__logo img { height: 22px; width: auto; }
.top__nav { display: none; }
.top__cta { margin-left: auto; }
.top__burger { display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; padding: 0 11px; background: none; border: 0; cursor: pointer; border-radius: 10px; }
.top__burger span { display: block; height: 2px; background: var(--azul); border-radius: 2px; transition: transform .25s, opacity .2s; }
.top__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.top__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.top__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.top__nav.is-open {
  display: flex; flex-direction: column; position: absolute; left: 0; right: 0; top: var(--top-h);
  background: #fff; border-bottom: 1px solid var(--gris-2); padding: 8px 16px 16px; box-shadow: 0 12px 24px rgba(11, 42, 74, .1);
}
.top__nav a { color: var(--tinta); text-decoration: none; font-weight: 600; padding: 12px 4px; border-bottom: 1px solid var(--gris); }
.top__nav a:hover { color: var(--celeste-osc); }
@media (max-width: 380px) { .top__cta span { display: none; } .top__cta { padding: .55em .7em; } }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; color: #fff; background: radial-gradient(120% 90% at 85% 10%, var(--azul-3) 0%, var(--azul) 55%, #071E36 100%); padding: 56px 0 64px; isolation: isolate; }
.hero__air { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero__air path { fill: none; stroke: var(--celeste); stroke-width: 2; stroke-opacity: .28; stroke-linecap: round; stroke-dasharray: 340 160; animation: flujo 14s linear infinite; }
.hero__air path:nth-child(2) { stroke-opacity: .2; animation-duration: 18s; }
.hero__air path:nth-child(3) { stroke-opacity: .14; animation-duration: 22s; }
.hero__air path:nth-child(4), .hero__air path:nth-child(5) { stroke-opacity: .12; animation-duration: 26s; }
@keyframes flujo { to { stroke-dashoffset: -1000; } }
.hero__fan { position: absolute; z-index: -1; right: -120px; bottom: -110px; width: 360px; color: rgba(53, 167, 232, .1); }
.hero__blades { transform-origin: 50px 50px; animation: girar 30s linear infinite; }
@keyframes girar { to { transform: rotate(360deg); } }
.hero__logo { width: min(300px, 78vw); height: auto; margin-bottom: 28px; }
.hero h1 { color: #fff; font-size: clamp(2rem, 1.3rem + 3.6vw, 3.6rem); font-weight: 800; max-width: 15ch; margin-bottom: 16px; }
.hero h1 span { color: var(--celeste); }
.hero__sub { font-size: clamp(1.05rem, 1rem + .4vw, 1.25rem); color: #D3E1EE; max-width: 36ch; margin-bottom: 28px; }
.hero__btns { display: flex; flex-direction: column; gap: 12px; }
.hero__chips { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.hero__chips li { font-size: .85rem; font-weight: 600; color: #CFE6F7; border: 1px solid rgba(53, 167, 232, .4); border-radius: 999px; padding: .3em .85em; background: rgba(53, 167, 232, .08); }

.hero__panel { display: none; }
.hero__panel-t { font: 700 .78rem/1 var(--t); letter-spacing: .14em; text-transform: uppercase; color: var(--celeste); margin-bottom: 16px; }
.hero__tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero__tiles a { display: flex; flex-direction: column; gap: 4px; padding: 18px; border-radius: 14px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .12); color: #fff; text-decoration: none; transition: background-color .2s, border-color .2s, transform .2s; }
.hero__tiles a:hover { background: rgba(53, 167, 232, .14); border-color: rgba(53, 167, 232, .6); transform: translateY(-2px); }
.hero__tiles svg { width: 40px; height: 40px; color: var(--celeste); margin-bottom: 8px; }
.hero__tiles b { font-family: var(--t); font-size: 1.02rem; }
.hero__tiles span { font-size: .86rem; color: #B9CDE0; }
.hero__panel-z { display: flex; align-items: center; gap: 8px; margin: 16px 0 0; font-weight: 600; color: #D3E1EE; font-size: .92rem; }
.hero__panel-z .ic { color: var(--celeste); }

/* ---------- Barra de confianza ---------- */
.trust { background: var(--azul-2); color: #fff; border-top: 1px solid rgba(255, 255, 255, .08); }
.trust__list { list-style: none; margin: 0 auto; padding: 14px 16px; display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: center; font: 700 .92rem/1.3 var(--t); letter-spacing: .01em; }
.trust__list li { display: inline-flex; align-items: center; gap: 8px; }
.trust__list .ic { color: var(--celeste); width: 1.1em; height: 1.1em; }

/* ---------- Secciones ---------- */
.sec { padding: 64px 0; }
.sec--gris { background: var(--gris); }
.sec--azul { background: var(--azul); color: #D3E1EE; }
.sec--azul h2, .sec--azul h3 { color: #fff; }
.sec__head { max-width: 720px; margin-bottom: 32px; }
.sec__head p:last-child { font-size: 1.06rem; }
.kicker { font: 700 .8rem/1 var(--t); letter-spacing: .14em; text-transform: uppercase; color: var(--celeste-osc); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.kicker::before { content: ""; width: 26px; height: 2px; background: currentColor; }
.kicker--claro { color: var(--celeste); }

/* ---------- Tarjetas de servicio ---------- */
.cards { display: grid; gap: 16px; }
.card { position: relative; background: #fff; border: 1px solid var(--gris-2); border-radius: var(--radio); padding: 24px; box-shadow: var(--sombra); display: flex; flex-direction: column; transition: transform .25s, box-shadow .25s, border-color .25s; }
.card:hover { transform: translateY(-3px); border-color: rgba(53, 167, 232, .5); box-shadow: 0 2px 4px rgba(11, 42, 74, .06), 0 16px 36px rgba(11, 42, 74, .12); }
.card::before { content: ""; position: absolute; left: 24px; right: 24px; top: 0; height: 3px; border-radius: 0 0 3px 3px; background: linear-gradient(90deg, var(--celeste), transparent); }
.card__ic { width: 64px; height: 64px; border-radius: 14px; background: linear-gradient(145deg, #EAF5FD, #D7ECFA); color: var(--azul); display: grid; place-items: center; margin-bottom: 18px; }
.card__ic svg { width: 40px; height: 40px; }
.card h3 { font-size: 1.35rem; }
.card p { margin-bottom: 16px; }
.card__tag { display: inline-block; align-self: flex-start; font-weight: 600; font-size: .92rem; color: var(--azul); background: #E3F2FC; border-left: 3px solid var(--celeste); border-radius: 6px; padding: .5em .8em; }
.card .btn { margin-top: auto; align-self: stretch; }

/* ---------- Formularios ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; min-width: 0; }
.field-row { display: grid; gap: 0 14px; }
label, legend { font-weight: 600; font-size: .93rem; color: var(--tinta); }
input, select, textarea {
  font: 400 1rem/1.4 var(--b); color: var(--tinta); width: 100%;
  border: 1.5px solid #C9D3DD; border-radius: 10px; padding: .75em .85em; background: #fff; min-height: 48px;
  transition: border-color .2s, box-shadow .2s;
}
textarea { resize: vertical; min-height: 96px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--celeste); box-shadow: 0 0 0 4px rgba(53, 167, 232, .18); }
.is-invalid { border-color: #D93838 !important; }
.form-error { color: #B42318; background: #FEF0EE; border-radius: 8px; padding: .6em .8em; font-weight: 500; font-size: .93rem; }
.sec--azul .form-error { color: #FFD7D2; background: rgba(217, 56, 56, .18); }
.checks { border: 0; padding: 0; margin: 4px 0 18px; }
.checks legend { margin-bottom: 8px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 500; color: var(--texto); padding: 8px 0; cursor: pointer; }
.check input { width: 22px; height: 22px; min-height: 0; flex: none; margin: 1px 0 0; accent-color: var(--celeste-osc); }

/* ---------- Calculadora ---------- */
.calc__grid { display: grid; gap: 18px; }
.calc__form, .calc__res { background: #fff; border-radius: var(--radio); box-shadow: var(--sombra); padding: 22px; }
.calc__form .btn { width: 100%; }
.calc__res { background: var(--azul); color: #D3E1EE; display: flex; flex-direction: column; justify-content: center; min-height: 260px; position: relative; overflow: hidden; }
.calc__res::after { content: ""; position: absolute; right: -60px; top: -60px; width: 200px; height: 200px; border-radius: 50%; border: 22px solid rgba(53, 167, 232, .1); }
.calc__empty { text-align: center; }
.calc__empty svg { width: 64px; height: 64px; margin: 0 auto 12px; color: var(--celeste); }
.calc__lbl { font: 700 .78rem/1 var(--t); letter-spacing: .12em; text-transform: uppercase; color: var(--celeste); margin-bottom: 6px; }
.calc__num { font: 800 clamp(2.6rem, 2rem + 3vw, 3.6rem)/1 var(--t); color: #fff; margin-bottom: 22px; }
.calc__num small { font-size: .35em; font-weight: 700; color: #A9C2D9; }
.calc__equipo { font: 700 1.35rem/1.3 var(--t); color: #fff; margin-bottom: 8px; }
.calc__nota { font-size: .95rem; margin-bottom: 20px; }
.calc__legal { font-size: .82rem; color: #A9C2D9; margin: 12px 0 0; }
.calc__out .btn { width: 100%; }
.calc__out.is-new .calc__num { animation: pop .45s ease-out; }
@keyframes pop { from { opacity: .3; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------- Empresas ---------- */
.emp { display: grid; gap: 28px; }
.emp__txt > p { font-size: 1.06rem; }
.emp__list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; }
.emp__list li { display: flex; gap: 14px; align-items: center; background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .1); border-radius: 14px; padding: 14px; }
.emp__list svg { width: 42px; height: 42px; flex: none; color: var(--celeste); }
.emp__list b { display: block; color: #fff; font-family: var(--t); }
.emp__list span { font-size: .95rem; }
.emp__form { background: #fff; color: var(--texto); border-radius: var(--radio); padding: 22px; box-shadow: 0 20px 50px rgba(0, 0, 0, .25); }
.emp__form h3 { color: var(--tinta); font-size: 1.25rem; }
.emp__help { font-size: .95rem; }
.emp__form .btn { width: 100%; }

/* ---------- Pasos ---------- */
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; counter-reset: paso; }
.steps li { position: relative; background: #fff; border: 1px solid var(--gris-2); border-radius: var(--radio); padding: 22px 22px 18px 84px; }
.steps__n { position: absolute; left: 20px; top: 20px; width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; font: 800 1.2rem/1 var(--t); color: #fff; background: var(--azul); box-shadow: 0 0 0 6px #E3F2FC; }
.steps h3 { margin-bottom: 6px; }
.steps p { margin: 0; }

/* ---------- Cobertura ---------- */
.cob { display: grid; gap: 28px; align-items: start; }
.cob__h { display: flex; align-items: center; gap: 8px; font-size: 1.05rem; margin: 22px 0 10px; }
.cob__h .ic { color: var(--celeste-osc); }
.tags { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { background: #fff; border: 1px solid var(--gris-2); border-radius: 999px; padding: .35em .8em; font-size: .9rem; font-weight: 500; color: var(--tinta); }
.cob__map { margin: 0; }
.cob__map svg { width: 100%; height: auto; border-radius: 20px; box-shadow: var(--sombra); }
.cob__map figcaption { font-size: .82rem; color: var(--acero-osc); margin-top: 8px; text-align: center; }

/* ---------- Galería ---------- */
.gal { display: grid; gap: 14px; grid-template-columns: 1fr; }
.gal__item { position: relative; margin: 0; border-radius: var(--radio); overflow: hidden; background: var(--gris); box-shadow: var(--sombra); }
.gal__item img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; transition: transform .5s; }
.gal__item:hover img { transform: scale(1.03); }
.gal__item figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 14px 12px; color: #fff; font-weight: 600; background: linear-gradient(transparent, rgba(7, 30, 54, .85)); }
.gal__ej { position: absolute; top: 10px; left: 10px; font-size: .72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--azul); background: rgba(255, 255, 255, .92); border-radius: 6px; padding: .3em .6em; }

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 880px; }
.faq { display: grid; gap: 10px; }
.faq details { background: #fff; border: 1px solid var(--gris-2); border-radius: 14px; }
.faq summary { list-style: none; cursor: pointer; padding: 18px 54px 18px 20px; font: 700 1.04rem/1.35 var(--t); color: var(--tinta); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 20px; top: 50%; width: 12px; height: 12px; margin-top: -8px; border-right: 2.5px solid var(--celeste-osc); border-bottom: 2.5px solid var(--celeste-osc); transform: rotate(45deg); transition: transform .25s; }
.faq details[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.faq details p { padding: 0 20px 18px; margin: 0; }

/* ---------- Cierre ---------- */
.cta { background: linear-gradient(120deg, var(--azul) 0%, var(--azul-3) 100%); color: #D3E1EE; padding: 56px 0; text-align: center; }
.cta h2 { color: #fff; max-width: 22ch; margin: 0 auto 10px; }
.cta p { margin-bottom: 24px; }

/* ---------- Footer ---------- */
.foot { background: #071E36; color: #A9BCD0; padding: 48px 0 96px; font-size: .95rem; }
.foot__in { display: grid; gap: 28px; }
.foot__brand img { width: 200px; height: auto; margin-bottom: 14px; }
.foot__h { font: 700 .8rem/1 var(--t); letter-spacing: .14em; text-transform: uppercase; color: #fff; margin-bottom: 14px; }
.foot__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.foot a { color: #D3E1EE; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; }
.foot a:hover { color: #fff; text-decoration: underline; }
.foot__bottom { border-top: 1px solid rgba(255, 255, 255, .1); margin-top: 32px; padding-top: 18px; display: flex; flex-wrap: wrap; gap: 6px 20px; justify-content: space-between; font-size: .85rem; }
.foot__bottom p { margin: 0; }
.foot__credit { font-size: .75rem; opacity: .7; }

/* ---------- WhatsApp flotante ---------- */
.wa-float { position: fixed; right: 16px; bottom: 16px; z-index: 60; width: 60px; height: 60px; border-radius: 50%; background: var(--wa); color: #fff; display: grid; place-items: center; box-shadow: 0 8px 24px rgba(0, 0, 0, .25); transition: transform .2s, background-color .2s; }
.wa-float svg { width: 32px; height: 32px; }
.wa-float:hover { transform: scale(1.06); background: var(--wa-osc); }
.wa-float::before { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid var(--wa); animation: latido 2.8s ease-out infinite; }
@keyframes latido { 0% { transform: scale(1); opacity: .7; } 70%, 100% { transform: scale(1.45); opacity: 0; } }

/* ---------- Aparición al scrollear ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s cubic-bezier(.2, .7, .2, 1); }
.js .reveal.is-in, .revealed .reveal { opacity: 1; transform: none; }

/* ---------- Movimiento reducido: sin bucles ni desplazamientos ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero__air path, .hero__blades, .wa-float::before { animation: none; }
  .js .reveal { transform: none; transition: opacity .3s ease; }
  .card:hover, .btn:hover, .gal__item:hover img, .hero__tiles a:hover { transform: none; }
  .calc__out.is-new .calc__num { animation: none; }
}

/* ---------- Tablet ---------- */
@media (min-width: 640px) {
  .hero__btns { flex-direction: row; flex-wrap: wrap; }
  .field-row { grid-template-columns: 1fr 1fr; }
  .gal { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}

/* ---------- Compu ---------- */
@media (min-width: 960px) {
  :root { --top-h: 76px; }
  .top__logo img { height: 26px; }
  .top__burger { display: none; }
  .top__nav { display: flex; gap: 4px; margin-left: auto; }
  .top__nav a { border: 0; padding: 8px 12px; border-radius: 8px; font-size: .95rem; }
  .top__nav a:hover { background: var(--gris); }
  .top__cta { margin-left: 8px; }
  .hero { padding: 96px 0 104px; }
  .hero__logo { width: 360px; }
  .hero__in { display: grid; grid-template-columns: 1.25fr 1fr; gap: 56px; align-items: center; }
  .hero__chips { display: none; }
  .hero__panel { display: block; padding: 24px; border-radius: 20px; background: rgba(7, 30, 54, .45); border: 1px solid rgba(255, 255, 255, .1); box-shadow: 0 30px 60px rgba(0, 0, 0, .25); }
  @supports (backdrop-filter: blur(6px)) { .hero__panel { backdrop-filter: blur(6px); } }
  .hero__fan { width: 620px; right: -140px; bottom: -200px; }
  .sec { padding: 96px 0; }
  .cards { grid-template-columns: 1fr 1fr; gap: 22px; }
  .card { padding: 32px; }
  .calc__grid { grid-template-columns: 1.15fr 1fr; gap: 24px; align-items: stretch; }
  .calc__form, .calc__res { padding: 32px; }
  .emp { grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
  .emp__form { padding: 32px; }
  .steps { grid-template-columns: repeat(4, 1fr); position: relative; }
  .steps::before { content: ""; position: absolute; left: 12%; right: 12%; top: 44px; height: 2px; background: repeating-linear-gradient(90deg, var(--celeste) 0 10px, transparent 10px 18px); z-index: 0; }
  .steps li { padding: 90px 22px 24px; text-align: center; z-index: 1; background: transparent; border: 0; }
  .steps__n { left: 50%; top: 18px; transform: translateX(-50%); width: 54px; height: 54px; font-size: 1.35rem; }
  .cob { grid-template-columns: 1.2fr 1fr; gap: 48px; }
  .cob__map { position: sticky; top: calc(var(--top-h) + 24px); }
  .gal { grid-template-columns: repeat(3, 1fr); }
  .foot__in { grid-template-columns: 1.4fr 1fr 1fr; }
  .foot__bottom { padding-right: 76px; }
}