/* =====================================================
   AISLAMIENTO TÉRMICO  ·  css/aislamiento.css
   Prefix: .at-
   ===================================================== */

:root {
    --at-navy:   #02042B;
    --at-blue:   #1B6CA8;
    --at-light:  #D5EBF8;
    --at-gray:   #F4F6F8;
    --at-gray2:  #F7F9FC;
    --at-white:  #FFFFFF;
    --at-text:   #1a1a2e;
    --at-muted:  #5a6a7e;
    --at-border: #dde6ef;
    --at-warn:   #e65c00;
    --at-warn-bg:#fff4ee;
    --at-radius: 12px;
    --at-shadow: 0 4px 24px rgba(2,4,43,.10);
    --at-trans:  .3s ease;
}

/* ── Reveal ── */
.at-reveal{opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease;}
.at-reveal.visible{opacity:1;transform:translateY(0);}
.at-reveal--left{opacity:0;transform:translateX(-40px);transition:opacity .6s ease,transform .6s ease;}
.at-reveal--left.visible{opacity:1;transform:translateX(0);}
.at-reveal--right{opacity:0;transform:translateX(40px);transition:opacity .6s ease,transform .6s ease;}
.at-reveal--right.visible{opacity:1;transform:translateX(0);}

/* ── Breadcrumb ── */
.at-breadcrumb{background:var(--at-gray);padding:10px 0;}
.at-breadcrumb__inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:6px;font-size:.82rem;color:var(--at-muted);}
.at-breadcrumb__inner a{color:var(--at-blue);text-decoration:none;}
.at-breadcrumb__inner a:hover{text-decoration:underline;}
.at-breadcrumb__sep{color:var(--at-muted);}

/* ── Layout base ── */
.at-section{padding:80px 0;}
.at-container{max-width:1200px;margin:0 auto;padding:0 24px;}
.at-section-label{font-size:.78rem;font-weight:700;letter-spacing:2px;color:var(--at-blue);text-transform:uppercase;display:block;margin-bottom:10px;}
.at-section-title{font-size:2rem;font-weight:800;color:var(--at-navy);margin:0 0 18px;}
.at-section-title span{color:var(--at-blue);}
.at-section-sub{font-size:1rem;color:var(--at-muted);max-width:680px;line-height:1.7;margin:0 0 8px;}
.at-divider{width:56px;height:4px;background:var(--at-blue);border-radius:2px;margin:0 0 32px;}
.at-divider--center{margin:0 auto 32px;}

/* =====================================================
   S2 — INTRO
   ===================================================== */
.at-intro{background:var(--at-white);overflow:hidden;}
.at-intro__grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.at-intro__img-wrap{border-radius:var(--at-radius);overflow:hidden;box-shadow:var(--at-shadow);}
.at-intro__img{width:100%;height:420px;object-fit:cover;display:block;}
.at-intro__lead{font-size:1.05rem;color:var(--at-text);line-height:1.8;margin-bottom:24px;}
.at-intro__checks{list-style:none;padding:0;margin:0 0 28px;display:flex;flex-direction:column;gap:10px;}
.at-intro__checks li{display:flex;align-items:flex-start;gap:10px;font-size:.93rem;color:var(--at-text);line-height:1.5;}
.at-intro__checks li i{color:var(--at-blue);margin-top:3px;flex-shrink:0;}
.at-intro__warn{background:var(--at-warn-bg);border-left:4px solid var(--at-warn);border-radius:0 8px 8px 0;padding:18px 20px;display:flex;gap:14px;align-items:flex-start;}
.at-intro__warn i{color:var(--at-warn);font-size:1.3rem;margin-top:2px;flex-shrink:0;}
.at-intro__warn p{margin:0;font-size:.92rem;color:#7a3a00;line-height:1.6;}
.at-intro__warn strong{color:var(--at-warn);display:block;margin-bottom:4px;}

/* =====================================================
   S3 — ¿POR QUÉ DEFANY?
   ===================================================== */
.at-porque{background:var(--at-navy);overflow:hidden;}
.at-porque .at-section-label{color:var(--at-light);}
.at-porque .at-section-title{color:var(--at-white);}
.at-porque .at-section-sub{color:rgba(255,255,255,.70);}
.at-porque__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;}
.at-porque__card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:var(--at-radius);padding:32px 28px;transition:var(--at-trans);}
.at-porque__card:hover{background:rgba(27,108,168,.25);border-color:var(--at-blue);transform:translateY(-4px);}
.at-porque__icon{width:52px;height:52px;border-radius:50%;background:rgba(27,108,168,.25);display:flex;align-items:center;justify-content:center;margin-bottom:18px;}
.at-porque__icon i{color:var(--at-light);font-size:1.25rem;}
.at-porque__title{font-size:1rem;font-weight:700;color:var(--at-white);margin:0 0 10px;}
.at-porque__desc{font-size:.88rem;color:rgba(255,255,255,.65);line-height:1.6;margin:0;}

/* =====================================================
   S4 — MATERIALES
   ===================================================== */
.at-materiales{background:var(--at-gray2);overflow:hidden;}
.at-mat__intro{max-width:760px;margin-bottom:40px;}
.at-mat__table-wrap{overflow-x:auto;border-radius:var(--at-radius);box-shadow:var(--at-shadow);}
.at-mat__table{width:100%;border-collapse:collapse;background:var(--at-white);font-size:.92rem;}
.at-mat__table thead{background:var(--at-navy);color:var(--at-white);}
.at-mat__table thead th{padding:14px 18px;text-align:left;font-weight:600;font-size:.84rem;letter-spacing:.4px;white-space:nowrap;}
.at-mat__table tbody tr:nth-child(even){background:var(--at-gray);}
.at-mat__table tbody tr:hover{background:var(--at-light);}
.at-mat__table td{padding:13px 18px;color:var(--at-text);border-bottom:1px solid var(--at-border);line-height:1.4;}
.at-mat__table td:first-child{font-weight:600;color:var(--at-navy);}
.at-mat__badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.75rem;font-weight:600;}
.at-mat__badge--hot{background:#fee2e2;color:#b91c1c;}
.at-mat__badge--cold{background:#dbeafe;color:#1d4ed8;}
.at-mat__badge--both{background:#d1fae5;color:#065f46;}
.at-mat__badge--high{background:#fef3c7;color:#92400e;}
.at-mat__note{margin-top:16px;font-size:.83rem;color:var(--at-muted);font-style:italic;}

/* =====================================================
   S5 — GALERÍA
   ===================================================== */
.at-galeria{background:var(--at-white);overflow:hidden;}
.at-galeria__grid{columns:3;column-gap:16px;margin-top:40px;}
.at-galeria__item{break-inside:avoid;margin-bottom:16px;border-radius:var(--at-radius);overflow:hidden;cursor:pointer;position:relative;display:block;}
.at-galeria__item img{width:100%;display:block;transition:transform .4s ease;}
.at-galeria__item:hover img{transform:scale(1.05);}
.at-galeria__overlay{position:absolute;inset:0;background:rgba(2,4,43,.50);opacity:0;display:flex;align-items:center;justify-content:center;transition:opacity .3s;}
.at-galeria__item:hover .at-galeria__overlay{opacity:1;}
.at-galeria__overlay i{color:#fff;font-size:2.2rem;}
.at-galeria__caption{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(0deg,rgba(2,4,43,.85) 0%,transparent 100%);color:#fff;font-size:.82rem;font-weight:500;padding:28px 14px 12px;opacity:0;transition:opacity .3s;}
.at-galeria__item:hover .at-galeria__caption{opacity:1;}

/* Lightbox */
.at-lightbox{position:fixed;inset:0;background:rgba(0,0,0,.92);z-index:9000;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s;}
.at-lightbox.is-open{opacity:1;pointer-events:all;}
.at-lightbox__img{max-width:90vw;max-height:88vh;border-radius:8px;box-shadow:0 8px 48px rgba(0,0,0,.6);object-fit:contain;}
.at-lightbox__close{position:absolute;top:20px;right:28px;color:#fff;font-size:2.4rem;cursor:pointer;line-height:1;background:none;border:none;padding:4px;}
.at-lightbox__close:hover{color:var(--at-light);}
.at-lightbox__caption{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);color:#fff;font-size:.88rem;background:rgba(0,0,0,.55);padding:6px 20px;border-radius:20px;white-space:nowrap;}

/* =====================================================
   S6 — PROCESO DE INSTALACIÓN
   ===================================================== */
.at-proceso{background:var(--at-gray);overflow:hidden;}
.at-proceso__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:40px;}
.at-proceso__step{background:var(--at-white);border-radius:var(--at-radius);padding:22px 26px;display:flex;gap:18px;align-items:flex-start;box-shadow:0 2px 12px rgba(2,4,43,.06);}
.at-proceso__num{width:40px;height:40px;border-radius:50%;background:var(--at-navy);color:#fff;font-size:.85rem;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.at-proceso__body h4{font-size:.93rem;font-weight:700;color:var(--at-navy);margin:0 0 5px;}
.at-proceso__body p{font-size:.87rem;color:var(--at-muted);margin:0;line-height:1.6;}

/* =====================================================
   S7 — CRITERIOS DE SELECCIÓN
   ===================================================== */
.at-criterios{background:var(--at-white);overflow:hidden;}
.at-criterios__grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:40px;}
.at-criterios__card{background:var(--at-gray2);border-radius:var(--at-radius);padding:28px 18px;text-align:center;border:2px solid transparent;transition:var(--at-trans);}
.at-criterios__card:hover{border-color:var(--at-blue);background:var(--at-light);}
.at-criterios__icon{width:56px;height:56px;border-radius:50%;background:var(--at-navy);display:flex;align-items:center;justify-content:center;margin:0 auto 14px;}
.at-criterios__icon i{color:var(--at-light);font-size:1.25rem;}
.at-criterios__title{font-size:.88rem;font-weight:700;color:var(--at-navy);margin:0 0 7px;}
.at-criterios__desc{font-size:.82rem;color:var(--at-muted);line-height:1.5;margin:0;}

/* =====================================================
   S8 — SECTORES
   ===================================================== */
.at-sectores{background:var(--at-gray2);overflow:hidden;}
.at-sectores__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px;}
.at-sector{background:var(--at-white);border-radius:var(--at-radius);padding:28px 22px;border-top:4px solid var(--at-blue);transition:var(--at-trans);box-shadow:0 2px 10px rgba(2,4,43,.05);}
.at-sector:hover{transform:translateY(-5px);box-shadow:var(--at-shadow);}
.at-sector__icon{font-size:1.9rem;color:var(--at-blue);margin-bottom:12px;}
.at-sector__title{font-size:.95rem;font-weight:700;color:var(--at-navy);margin:0 0 12px;}
.at-sector__list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:7px;}
.at-sector__list li{font-size:.84rem;color:var(--at-muted);display:flex;align-items:flex-start;gap:8px;line-height:1.4;}
.at-sector__list li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--at-blue);flex-shrink:0;margin-top:5px;}

/* =====================================================
   S9 — PROBLEMAS COMUNES
   ===================================================== */
.at-problemas{background:var(--at-navy);overflow:hidden;}
.at-problemas .at-section-label{color:var(--at-light);}
.at-problemas .at-section-title{color:var(--at-white);}
.at-problemas .at-section-sub{color:rgba(255,255,255,.70);}
.at-problemas__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px;}
.at-problema{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);border-radius:var(--at-radius);padding:24px 20px;transition:var(--at-trans);}
.at-problema:hover{background:rgba(230,92,0,.15);border-color:rgba(230,92,0,.5);}
.at-problema__icon{font-size:1.7rem;margin-bottom:12px;}
.at-problema__title{font-size:.92rem;font-weight:700;color:var(--at-white);margin:0 0 8px;}
.at-problema__desc{font-size:.85rem;color:rgba(255,255,255,.60);line-height:1.5;margin:0;}

/* =====================================================
   S10 — SERVICIOS DEFANY
   ===================================================== */
.at-servicios{background:var(--at-white);overflow:hidden;}
.at-servicios__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px;}
.at-servicio{background:var(--at-gray2);border-radius:var(--at-radius);padding:28px 24px;border-left:4px solid var(--at-blue);transition:var(--at-trans);}
.at-servicio:hover{background:var(--at-light);transform:translateX(4px);}
.at-servicio__icon{width:46px;height:46px;border-radius:50%;background:var(--at-blue);display:flex;align-items:center;justify-content:center;margin-bottom:14px;}
.at-servicio__icon i{color:#fff;font-size:1rem;}
.at-servicio__title{font-size:.93rem;font-weight:700;color:var(--at-navy);margin:0 0 8px;}
.at-servicio__desc{font-size:.87rem;color:var(--at-muted);line-height:1.6;margin:0;}

/* =====================================================
   S11 — NORMATIVA
   ===================================================== */
.at-normas{background:var(--at-gray);overflow:hidden;}
.at-normas__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px;}
.at-norma{background:var(--at-white);border-radius:var(--at-radius);padding:28px 24px;box-shadow:0 2px 12px rgba(2,4,43,.06);}
.at-norma__tag{display:inline-block;background:var(--at-navy);color:#fff;font-size:.74rem;font-weight:700;letter-spacing:1px;padding:4px 12px;border-radius:4px;margin-bottom:12px;text-transform:uppercase;}
.at-norma__title{font-size:.93rem;font-weight:700;color:var(--at-navy);margin:0 0 8px;}
.at-norma__desc{font-size:.87rem;color:var(--at-muted);line-height:1.6;margin:0;}

/* =====================================================
   S12 — COTIZADOR
   ===================================================== */
.at-cotizador{background:var(--at-navy);overflow:hidden;}
.at-cotizador .at-section-label{color:var(--at-light);}
.at-cotizador .at-section-title{color:var(--at-white);}
.at-cotizador .at-section-sub{color:rgba(255,255,255,.70);}
.at-cotizador__card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:40px;margin-top:36px;}
.at-cotizador__form{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.at-cotizador__group{display:flex;flex-direction:column;gap:6px;}
.at-cotizador__group--full{grid-column:1/-1;}
.at-cotizador__label{font-size:.83rem;font-weight:600;color:rgba(255,255,255,.80);letter-spacing:.3px;}
.at-cotizador__input,
.at-cotizador__select,
.at-cotizador__textarea{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:8px;padding:11px 14px;color:#fff;font-family:Poppins,sans-serif;font-size:.9rem;transition:var(--at-trans);width:100%;box-sizing:border-box;}
.at-cotizador__input::placeholder,
.at-cotizador__textarea::placeholder{color:rgba(255,255,255,.35);}
.at-cotizador__input:focus,
.at-cotizador__select:focus,
.at-cotizador__textarea:focus{outline:none;border-color:var(--at-light);background:rgba(255,255,255,.12);}
.at-cotizador__select option{background:var(--at-navy);color:#fff;}
.at-cotizador__textarea{resize:vertical;min-height:90px;}
.at-cotizador__btn-row{grid-column:1/-1;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:6px;}
.at-btn{display:inline-flex;align-items:center;gap:10px;padding:14px 30px;border-radius:8px;font-family:Poppins,sans-serif;font-size:.93rem;font-weight:600;cursor:pointer;text-decoration:none;border:none;transition:var(--at-trans);}
.at-btn--primary{background:var(--at-light);color:var(--at-navy);}
.at-btn--primary:hover{background:#fff;transform:translateY(-2px);}
.at-btn--wa{background:#25D366;color:#fff;}
.at-btn--wa:hover{background:#1da851;transform:translateY(-2px);}

/* =====================================================
   S13 — FAQ
   ===================================================== */
.at-faq{background:var(--at-gray2);overflow:hidden;}
.at-faq__list{max-width:820px;margin:40px auto 0;display:flex;flex-direction:column;gap:10px;}
.at-faq__item{border:1px solid var(--at-border);border-radius:var(--at-radius);overflow:hidden;}
.at-faq__q{display:flex;justify-content:space-between;align-items:center;padding:17px 22px;cursor:pointer;background:var(--at-white);gap:16px;transition:background var(--at-trans);}
.at-faq__item.is-open .at-faq__q{background:var(--at-navy);}
.at-faq__q-text{font-size:.93rem;font-weight:600;color:var(--at-navy);}
.at-faq__item.is-open .at-faq__q-text{color:#fff;}
.at-faq__q-icon{flex-shrink:0;color:var(--at-blue);transition:transform var(--at-trans);}
.at-faq__item.is-open .at-faq__q-icon{transform:rotate(45deg);color:var(--at-light);}
.at-faq__a{max-height:0;overflow:hidden;transition:max-height .4s ease;}
.at-faq__item.is-open .at-faq__a{max-height:320px;}
.at-faq__a-inner{padding:18px 22px;background:var(--at-white);font-size:.88rem;color:var(--at-muted);line-height:1.7;}

/* =====================================================
   S14 — RELACIONADOS
   ===================================================== */
.at-relacionados{background:var(--at-white);overflow:hidden;}
.at-rel__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px;}
.at-rel{display:flex;flex-direction:column;align-items:center;text-align:center;background:var(--at-gray2);border-radius:var(--at-radius);padding:30px 22px;text-decoration:none;color:inherit;transition:var(--at-trans);border:2px solid transparent;}
.at-rel:hover{border-color:var(--at-blue);background:var(--at-light);transform:translateY(-4px);}
.at-rel__icon{font-size:2.2rem;color:var(--at-blue);margin-bottom:14px;}
.at-rel__name{font-size:.95rem;font-weight:700;color:var(--at-navy);margin:0 0 8px;}
.at-rel__desc{font-size:.85rem;color:var(--at-muted);line-height:1.5;margin:0;}

/* =====================================================
   S15 — CTA FINAL
   ===================================================== */
.at-cta{padding:96px 0;background:linear-gradient(135deg,#1B6CA8 0%,#02042B 100%);text-align:center;overflow:hidden;position:relative;z-index:1;}
.at-cta__title{font-size:2.2rem;font-weight:800;color:#fff;margin:0 0 16px;}
.at-cta__sub{font-size:1rem;color:rgba(255,255,255,.80);margin:0 auto 36px;max-width:620px;line-height:1.7;}
.at-cta__btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.at-cta__btn{display:inline-flex;align-items:center;gap:10px;padding:15px 36px;border-radius:8px;font-family:Poppins,sans-serif;font-size:.98rem;font-weight:700;cursor:pointer;text-decoration:none;transition:var(--at-trans);}
.at-cta__btn--light{background:var(--at-white);color:var(--at-navy);}
.at-cta__btn--light:hover{background:var(--at-light);transform:translateY(-2px);}
.at-cta__btn--wa{background:#25D366;color:#fff;}
.at-cta__btn--wa:hover{background:#1da851;transform:translateY(-2px);}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media(max-width:1100px){
    .at-criterios__grid{grid-template-columns:repeat(3,1fr);}
    .at-sectores__grid{grid-template-columns:repeat(2,1fr);}
    .at-problemas__grid{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:1024px){
    .at-intro__grid{grid-template-columns:1fr;}
    .at-intro__img{height:300px;}
    .at-porque__grid{grid-template-columns:repeat(2,1fr);}
    .at-servicios__grid{grid-template-columns:repeat(2,1fr);}
    .at-normas__grid{grid-template-columns:repeat(2,1fr);}
    .at-rel__grid{grid-template-columns:repeat(2,1fr);}
    .at-galeria__grid{columns:2;}
}
@media(max-width:768px){
    .at-section{padding:56px 0;}
    .at-section-title{font-size:1.6rem;}
    .at-porque__grid{grid-template-columns:1fr;}
    .at-proceso__grid{grid-template-columns:1fr;}
    .at-criterios__grid{grid-template-columns:repeat(2,1fr);}
    .at-sectores__grid{grid-template-columns:1fr;}
    .at-problemas__grid{grid-template-columns:1fr;}
    .at-servicios__grid{grid-template-columns:1fr;}
    .at-normas__grid{grid-template-columns:1fr;}
    .at-rel__grid{grid-template-columns:1fr;}
    .at-galeria__grid{columns:1;}
    .at-cotizador__form{grid-template-columns:1fr;}
    .at-cotizador__card{padding:28px 20px;}
    .at-cta__title{font-size:1.7rem;}
    .at-cta{padding:64px 0;}
}