/* =========================================================
   IPSA PANEL · Sistema visual
   Paleta derivada del logotipo:
   - Azul IPSA  #1C82DB  (palabra IPSA)
   - Grafito    #232733  (palabra PANEL)
   - Acero      #7A808C  (trazo del edificio)
   ========================================================= */
:root{
  --azul:#1C82DB; --azul-700:#0F5FA8; --azul-900:#0A3D6E; --cielo:#5AB0F5; --azul-50:#EAF4FD;
  --grafito:#232733; --noche:#14171F; --acero:#7A808C; --acero-300:#A9B0BC;
  --niebla:#F3F5F8; --linea:#E1E5EB; --blanco:#FFFFFF; --texto:#3B404C;
  --ok:#17845A; --err:#C0392B;
  --r:10px; --wrap:1180px;
  --ff:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --fh:"Inter Tight","Inter",system-ui,sans-serif;
  --sh:0 1px 2px rgba(20,23,31,.06),0 8px 24px -12px rgba(20,23,31,.18);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;font:400 16px/1.65 var(--ff);color:var(--texto);background:var(--blanco);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:var(--azul-700);text-decoration:none}
a:hover{color:var(--azul)}
h1,h2,h3,h4{font-family:var(--fh);color:var(--grafito);line-height:1.12;margin:0 0 .5em;letter-spacing:-.02em}
h1{font-size:clamp(2.2rem,4.6vw,3.7rem);font-weight:800}
h2{font-size:clamp(1.75rem,3.1vw,2.6rem);font-weight:800}
h3{font-size:1.15rem;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:8px;background:var(--grafito);color:#fff;padding:8px 14px;border-radius:6px;z-index:99}
.skip:focus{left:8px}
:focus-visible{outline:3px solid var(--cielo);outline-offset:2px}

.eyebrow{font:700 .76rem/1 var(--ff);letter-spacing:.16em;text-transform:uppercase;color:var(--azul);margin-bottom:16px;display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:22px;height:2px;background:currentColor}
.eyebrow--light{color:var(--cielo)}

/* Botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font:600 .96rem/1 var(--ff);padding:16px 24px;border-radius:8px;border:1.5px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--azul);color:#fff}
.btn--primary:hover{background:var(--azul-700);color:#fff}
.btn--dark{background:var(--grafito);color:#fff}
.btn--dark:hover{background:var(--noche);color:#fff}
.btn--ghost{border-color:rgba(255,255,255,.28);color:#fff}
.btn--ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.06)}
.btn--sm{padding:11px 18px;font-size:.88rem}
.btn--block{width:100%}

/* Encabezado */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.top.is-scrolled{border-color:var(--linea);box-shadow:0 6px 20px -16px rgba(20,23,31,.4)}
.top__in{display:flex;align-items:center;justify-content:space-between;height:76px}
.top__logo img{height:58px;width:auto}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--grafito);font-weight:500;font-size:.94rem}
.nav a:not(.btn):hover{color:var(--azul)}
.nav .nav__cta{color:#fff;margin-left:6px}
.burger{display:none;background:none;border:0;width:44px;height:44px;padding:10px;cursor:pointer}
.burger span{display:block;height:2px;background:var(--grafito);margin:5px 0;transition:transform .25s,opacity .25s}

/* Hero */
.hero{position:relative;background:var(--noche);color:#C9CFD9;overflow:hidden;isolation:isolate}
.hero__grid{position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(90,176,245,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(90,176,245,.07) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse at 75% 40%,#000 20%,transparent 70%)}
.hero::after{content:"";position:absolute;right:-12%;top:-30%;width:60%;height:120%;background:radial-gradient(closest-side,rgba(28,130,219,.28),transparent);z-index:-1}
.hero__in{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;padding-top:88px;padding-bottom:96px}
.hero h1{color:#fff}
.hero h1 span{color:var(--cielo)}
.lead{font-size:1.14rem;max-width:560px;color:#B8C0CC}
.hero__ctas{display:flex;flex-wrap:wrap;gap:14px;margin:32px 0 44px}
.hero__facts{list-style:none;margin:0;padding:24px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;border-top:1px solid rgba(255,255,255,.1)}
.hero__facts strong{display:block;color:#fff;font:700 1.02rem/1.2 var(--fh);margin-bottom:4px}
.hero__facts span{font-size:.86rem;color:#8E96A3}
.hero__art{margin:0}
.wall{width:100%;height:auto;filter:drop-shadow(0 30px 40px rgba(0,0,0,.35))}

/* Marcas */
.brands{border-bottom:1px solid var(--linea);padding:40px 0}
.brands__label{text-align:center;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--acero);font-weight:600;margin-bottom:24px}
.brands__row{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.marca{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:92px;padding:14px;border:1px solid var(--linea);border-radius:var(--r);background:#fff;text-align:center;transition:border-color .2s,box-shadow .2s}
.marca:hover{border-color:var(--acero-300);box-shadow:var(--sh)}
.marca img{max-height:52px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.78;transition:filter .25s,opacity .25s}
.marca:hover img{filter:none;opacity:1}
.marca__name{font:800 1.08rem/1.1 var(--fh);color:var(--grafito);letter-spacing:-.01em}
.marca__tag{font-size:.72rem;color:var(--acero);margin-top:4px}

/* Secciones */
.sec{padding:112px 0}
.sec--tint{background:var(--niebla)}
.sec--dark{background:var(--grafito);color:#B8C0CC}
.sec--dark h2,.sec--dark strong{color:#fff}
.sec__head{max-width:720px;margin:0 auto 56px;text-align:center}
.sec__head .eyebrow{justify-content:center}
.sec__head > p:last-child{font-size:1.08rem}
.sec__head--left{text-align:left;margin:0}
.sec__head--left .eyebrow{justify-content:flex-start}
.split{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.split--rev > :first-child{order:0}

/* Tarjetas */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--linea);border-radius:14px;padding:30px 28px;transition:transform .25s,box-shadow .25s,border-color .25s;position:relative}
.card::before{content:"";position:absolute;left:28px;right:28px;top:-1px;height:3px;background:var(--azul);transform:scaleX(0);transform-origin:left;transition:transform .3s}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh);border-color:#D2D8E0}
.card:hover::before{transform:scaleX(1)}
.card__ic{width:56px;height:56px;border-radius:12px;background:var(--azul-50);display:grid;place-items:center;margin-bottom:22px}
.card__ic svg{width:32px;height:32px;fill:none;stroke:var(--azul);stroke-width:2.2;stroke-linejoin:round;stroke-linecap:round}
.card__ic .f{fill:var(--azul);stroke:none}
.card__ic .thin{stroke-width:1.1}
.card p{font-size:.96rem}
.ticks{list-style:none;margin:16px 0 0;padding:16px 0 0;border-top:1px dashed var(--linea);font-size:.9rem;color:var(--grafito)}
.ticks li{position:relative;padding-left:22px;margin:6px 0}
.ticks li::before{content:"";position:absolute;left:0;top:.55em;width:10px;height:6px;border-left:2px solid var(--azul);border-bottom:2px solid var(--azul);transform:rotate(-45deg)}

/* Pasos */
.steps{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.step{display:flex;gap:22px;background:#fff;border:1px solid var(--linea);border-radius:14px;padding:24px 26px}
.step__n{font:800 1.5rem/1 var(--fh);color:var(--azul);min-width:44px;padding-top:2px}
.step h3{margin-bottom:6px}
.step p{margin:0;font-size:.95rem}
.sec__head--left .btn{margin-top:10px}

/* Impermeabilización */
.layers,.pw{margin:0}
.layers svg,.pw svg{width:100%;height:auto;overflow:visible}

.specs{margin:28px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:18px 28px}
.specs div{border-left:3px solid var(--azul);padding:2px 0 2px 16px}
.specs dt{font:700 1rem/1.3 var(--fh);color:var(--grafito);margin-bottom:4px}
.specs dd{margin:0;font-size:.92rem}

/* Panel W */
.feats{list-style:none;margin:30px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.feats li{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09);border-radius:12px;padding:18px 20px}
.feats strong{display:block;font:700 1rem/1.3 var(--fh);margin-bottom:4px}
.feats span{font-size:.9rem}

/* Por qué */
.why{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--linea)}
.why__i{padding:30px 26px 6px;border-right:1px solid var(--linea)}
.why__i:last-child{border-right:0}
.why__k{display:block;font:800 1.25rem/1.2 var(--fh);color:var(--grafito);margin-bottom:10px}
.why__k::before{content:"";display:block;width:28px;height:3px;background:var(--azul);margin-bottom:16px}
.why p{font-size:.95rem}

/* Cotización */
.quote{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:start}
.contact-list{list-style:none;margin:32px 0 0;padding:0;border-top:1px solid var(--linea)}
.contact-list li{display:grid;grid-template-columns:110px 1fr;gap:12px;padding:14px 0;border-bottom:1px solid var(--linea);font-size:.96rem}
.contact-list span{font-size:.76rem;letter-spacing:.12em;text-transform:uppercase;color:var(--acero);font-weight:600;padding-top:3px}
.contact-list a,.contact-list p{color:var(--grafito);font-weight:500;margin:0;overflow-wrap:anywhere}
.contact-list a:hover{color:var(--azul)}
.form{background:#fff;border:1px solid var(--linea);border-radius:16px;padding:36px;box-shadow:var(--sh);display:grid;gap:18px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form label{display:grid;gap:7px;font-size:.86rem;font-weight:600;color:var(--grafito)}
.form input,.form select,.form textarea{font:400 1rem/1.4 var(--ff);color:var(--grafito);width:100%;padding:13px 14px;border:1.5px solid var(--linea);border-radius:8px;background:#fff;transition:border-color .2s,box-shadow .2s}
.form textarea{resize:vertical;min-height:110px}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--azul);box-shadow:0 0 0 4px rgba(28,130,219,.14)}
.form .is-invalid{border-color:var(--err)}
.form .check{display:flex;align-items:flex-start;gap:10px;font-weight:500;color:var(--texto)}
.form .check input{width:18px;height:18px;margin-top:3px;accent-color:var(--azul)}
.hp{position:absolute!important;left:-9999px!important}
.alert{padding:14px 16px;border-radius:8px;font-size:.94rem;font-weight:500}
.alert--ok{background:#E7F5EE;color:var(--ok)}
.alert--err{background:#FBEAEA;color:var(--err)}

/* Pie */
.foot{background:var(--noche);color:#8E96A3;padding:72px 0 0;font-size:.94rem}
.foot__in{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:48px}
.foot__brand img{height:56px;width:auto;margin-bottom:18px}
.foot__brand p{max-width:360px}
.foot h4{color:#fff;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:16px}
.foot__col{display:flex;flex-direction:column;gap:9px}
.foot__col a{color:#C9CFD9}
.foot__col a:hover{color:var(--cielo)}
.foot__col p{margin:0}
.foot__legal{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.08);padding-top:22px;padding-bottom:26px;font-size:.82rem}
.foot__legal p{margin:0}
.foot__legal a{color:#C9CFD9}

/* WhatsApp flotante */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:60;width:58px;height:58px;border-radius:50%;background:#25D366;color:#fff;display:grid;place-items:center;box-shadow:0 10px 24px -6px rgba(0,0,0,.35);transition:transform .2s}
.wa-float:hover{transform:scale(1.06);color:#fff}

/* Animación de entrada */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-in{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}}

/* Páginas internas */
.legal{padding:72px 0 96px}
.legal .wrap{max-width:820px}
.legal h2{font-size:1.3rem;margin-top:2em}

/* Responsivo */
@media (max-width:1060px){
  .nav{gap:20px}
  .hero__in,.split,.quote{grid-template-columns:1fr;gap:48px}
  .hero__art{max-width:560px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .brands__row{grid-template-columns:repeat(3,1fr)}
  .why{grid-template-columns:repeat(2,1fr)}
  .why__i:nth-child(2){border-right:0}
  .split--rev > :first-child{order:2}
  .layers svg{max-width:560px}
}
@media (max-width:900px){
  .burger{display:block}
  .nav{position:fixed;inset:76px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;background:#fff;padding:8px 24px 24px;border-bottom:1px solid var(--linea);box-shadow:0 20px 30px -20px rgba(0,0,0,.25);transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .2s,transform .2s,visibility .2s}
  .nav.is-open{opacity:1;transform:none;visibility:visible}
  .nav a{padding:14px 0;border-bottom:1px solid var(--linea)}
  .nav .nav__cta{margin:14px 0 0;border:0}
  .burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger[aria-expanded="true"] span:nth-child(2){opacity:0}
  .burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .foot__in{grid-template-columns:1fr 1fr}
  .foot__brand{grid-column:1/-1}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .sec{padding:76px 0}
  .top__in{height:68px}
  .top__logo img{height:42px}
  .nav{inset:68px 0 auto 0}
  .hero__in{padding-top:56px;padding-bottom:64px}
  .hero__ctas .btn{width:100%}
  .hero__facts{grid-template-columns:1fr;gap:14px}
  .cards,.row,.specs,.feats,.why{grid-template-columns:1fr}
  .why__i{border-right:0;border-bottom:1px solid var(--linea);padding:24px 0}
  .brands__row{grid-template-columns:repeat(2,1fr)}
  .form{padding:24px 18px}
  .contact-list li{grid-template-columns:1fr;gap:2px}
  .step{padding:20px;gap:14px}
  .foot__in{grid-template-columns:1fr}
  .wa-float{right:16px;bottom:16px;width:54px;height:54px}
}