/* TechoSolar — hoja de estilos principal */
:root{
  --ink:#14211f;
  --ink-soft:#43514e;
  --muted:#6b7774;
  --bg:#fbf8f2;
  --surface:#ffffff;
  --line:#e7e1d4;
  --brand:#0e4a45;
  --brand-2:#13665f;
  --brand-tint:#e4efec;
  --sun:#f2a516;
  --sun-tint:#fdf1d8;
  --danger:#b3261e;
  --radius:14px;
  --shadow:0 1px 2px rgba(20,33,31,.06),0 8px 24px rgba(20,33,31,.06);
  --max:1160px;
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--sans)}
img,svg{max-width:100%;display:block}
a{color:var(--brand-2);text-underline-offset:3px}
a:hover{color:var(--brand)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.18;letter-spacing:-.01em;margin:0 0 .5em;color:var(--ink)}
h1{font-size:clamp(2rem,4.4vw,3.3rem)}
h2{font-size:clamp(1.55rem,2.8vw,2.2rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.container{width:min(var(--max),100% - 2.5rem);margin-inline:auto}
.skip{position:absolute;left:-999px}
.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem 1rem;z-index:100}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px;border-radius:4px}

/* Cabecera */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,248,242,.92);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:68px}
.logo{display:flex;align-items:center;gap:.55rem;text-decoration:none;color:var(--ink);font-family:var(--serif);font-weight:700;font-size:1.3rem}
.logo span b{color:var(--brand-2)}
.nav ul{list-style:none;display:flex;gap:.2rem;margin:0;padding:0;align-items:center}
.nav a{display:block;white-space:nowrap;padding:.45rem .55rem;border-radius:8px;text-decoration:none;color:var(--ink-soft);font-size:.93rem;font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{background:var(--brand-tint);color:var(--brand)}
.nav .cta-link{background:var(--brand);color:#fff;margin-left:.4rem}
.nav .cta-link:hover{background:var(--brand-2);color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:.5rem .65rem;cursor:pointer;color:var(--ink)}
@media (max-width:1240px){
  .menu-btn{display:block}
  .nav{position:absolute;left:0;right:0;top:68px;background:var(--bg);border-bottom:1px solid var(--line);display:none}
  .nav.open{display:block}
  .nav ul{flex-direction:column;align-items:stretch;padding:.75rem 1.25rem 1.25rem}
  .nav .cta-link{margin:.5rem 0 0;text-align:center}
}

/* Botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.8rem 1.25rem;border-radius:999px;font-weight:600;text-decoration:none;border:1.5px solid transparent;cursor:pointer;font:600 1rem/1.2 var(--sans);transition:transform .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2);color:#fff}
.btn-sun{background:var(--sun);color:#1f1600}
.btn-sun:hover{background:#ffb627;color:#1f1600}
.btn-ghost{border-color:var(--line);color:var(--ink);background:var(--surface)}
.btn-ghost:hover{border-color:var(--brand-2);color:var(--brand)}

/* Hero */
.hero{position:relative;padding:4.5rem 0 3.5rem;overflow:hidden}
.hero::before{content:"";position:absolute;right:-180px;top:-200px;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,var(--sun-tint) 0%,rgba(253,241,216,0) 70%);z-index:-1}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.82rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--brand-2);background:var(--brand-tint);padding:.35rem .75rem;border-radius:999px;margin-bottom:1.1rem}
.lead{font-size:1.15rem;color:var(--ink-soft);max-width:38rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin:1.6rem 0 1.4rem}
.hero-trust{display:flex;flex-wrap:wrap;gap:1.25rem;font-size:.9rem;color:var(--muted)}
.hero-trust span{display:inline-flex;align-items:center;gap:.4rem}
.hero-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:1.6rem}
.hero-card h2{font-size:1.25rem;margin-bottom:.25rem}
.hero-card .small{margin-bottom:1rem}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}.hero{padding-top:2.75rem}}

/* Secciones */
section{padding:3.5rem 0}
.section-head{max-width:44rem;margin-bottom:2rem}
.section-head p{color:var(--ink-soft);font-size:1.05rem}
.alt{background:var(--surface);border-block:1px solid var(--line)}
.small{font-size:.88rem;color:var(--muted)}

/* Tarjetas */
.grid{display:grid;gap:1.1rem}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media (max-width:960px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.g4,.g3,.g2{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.35rem;transition:border-color .15s,box-shadow .15s,transform .15s;position:relative}
a.card{text-decoration:none;color:inherit;display:block}
a.card:hover{border-color:var(--brand-2);box-shadow:var(--shadow);transform:translateY(-2px)}
.card h3{margin:.65rem 0 .35rem}
.card p{color:var(--ink-soft);margin:0;font-size:.95rem}
.icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--brand-tint);color:var(--brand)}
.icon.sun{background:var(--sun-tint);color:#9a6400}
.tool-card .arrow{margin-top:1rem;font-weight:600;color:var(--brand-2);display:inline-flex;gap:.35rem;align-items:center}
.count{position:absolute;top:1.1rem;right:1.1rem;font-size:.78rem;color:var(--muted)}

/* Artículos destacados */
.feature,a.card.feature{display:grid;grid-template-columns:200px 1fr;gap:1.4rem;align-items:center}
.feature-art{height:100%;min-height:150px;border-radius:12px;background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 60%,var(--sun) 160%);display:grid;place-items:center;color:#fff}
@media (max-width:640px){.feature{grid-template-columns:1fr}.feature-art{min-height:110px}}
.tag{display:inline-block;font-size:.75rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:#8a5a00;background:var(--sun-tint);padding:.2rem .55rem;border-radius:6px}
.tag.green{color:var(--brand);background:var(--brand-tint)}
.meta{font-size:.85rem;color:var(--muted)}

/* Confianza */
.trust-list{list-style:none;padding:0;margin:0;display:grid;gap:1rem}
.trust-list li{display:flex;gap:.9rem;align-items:flex-start}
.trust-list .icon{flex:none;width:40px;height:40px}
.sources{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}
.sources span{border:1px solid var(--line);border-radius:999px;padding:.3rem .8rem;font-size:.85rem;background:var(--bg)}

/* Pasos */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}
.steps li{list-style:none;counter-increment:s;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem}
.steps li::before{content:counter(s);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--sun);font-weight:700;margin-bottom:.7rem}
.steps{padding:0;margin:0}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

/* Formularios */
.form{display:grid;gap:.9rem}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:.9rem}
@media (max-width:560px){.form .row{grid-template-columns:1fr}}
label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.3rem}
.hint{font-weight:400;color:var(--muted);font-size:.82rem}
input,select,textarea{width:100%;font:inherit;padding:.7rem .8rem;border-radius:10px;border:1.5px solid var(--line);background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--brand-2);outline:none;box-shadow:0 0 0 3px var(--brand-tint)}
.check{display:flex;gap:.6rem;align-items:flex-start;font-weight:400;font-size:.88rem;color:var(--ink-soft)}
.check input{width:auto;margin-top:.3rem}
.form-msg{display:none;padding:.9rem 1rem;border-radius:10px;font-size:.95rem}
.form-msg.ok{display:block;background:var(--brand-tint);color:var(--brand)}
.form-msg.err{display:block;background:#fbe9e7;color:var(--danger)}
.lead-box{background:var(--brand);color:#eaf3f1;border-radius:24px;padding:2.4rem;display:grid;grid-template-columns:.9fr 1.1fr;gap:2.4rem}
.lead-box h2{color:#fff}
.lead-box .form{background:var(--surface);color:var(--ink);padding:1.5rem;border-radius:16px}
.lead-box ul{padding-left:1.1rem}
@media (max-width:900px){.lead-box{grid-template-columns:1fr;padding:1.5rem}}

/* Calculadoras */
.calc{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:1.75rem;margin-bottom:2rem;scroll-margin-top:90px}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
@media (max-width:860px){.calc-grid{grid-template-columns:1fr}}
.result{background:var(--bg);border:1px dashed var(--line);border-radius:14px;padding:1.3rem}
.kpis{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;margin-bottom:1rem}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:.85rem 1rem}
.kpi .v{font-family:var(--serif);font-size:1.6rem;font-weight:600;color:var(--brand);line-height:1.1}
.kpi .l{font-size:.82rem;color:var(--muted)}
.kpi.hl{background:var(--brand);border-color:var(--brand)}
.kpi.hl .v{color:#fff}.kpi.hl .l{color:#cfe3df}
.aid-list{display:grid;gap:.75rem}
.aid{border:1px solid var(--line);border-radius:12px;padding:1rem;background:var(--surface)}
.aid h4{font-family:var(--sans);font-size:1rem;margin:0 0 .25rem}
.aid p{margin:0;font-size:.92rem;color:var(--ink-soft)}

/* Artículo */
.breadcrumbs{font-size:.85rem;color:var(--muted);padding-top:1.5rem}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem;padding:0;margin:0}
.breadcrumbs li+li::before{content:"›";margin-right:.35rem}
.breadcrumbs a{color:var(--muted)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:3rem;padding:1.5rem 0 3rem}
@media (max-width:980px){.article-layout{grid-template-columns:1fr}}
.prose{max-width:46rem}
.prose h2{margin-top:2.2rem;scroll-margin-top:90px}
.prose h3{margin-top:1.6rem}
.prose ul,.prose ol{padding-left:1.3rem}
.prose li{margin-bottom:.35rem}
.byline{display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;align-items:center;font-size:.9rem;color:var(--muted);padding:1rem 0;border-block:1px solid var(--line);margin:1.25rem 0 1.75rem}
.byline strong{color:var(--ink)}
.updated{display:inline-flex;align-items:center;gap:.35rem;background:var(--sun-tint);color:#7a4f00;padding:.2rem .6rem;border-radius:6px;font-weight:600}
.table-wrap{overflow-x:auto;margin:1.25rem 0;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.93rem}
th,td{padding:.7rem .9rem;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#f4efe4;font-weight:600}
tr:last-child td{border-bottom:none}
td.num,th.num{text-align:right;white-space:nowrap}
.callout{border-left:4px solid var(--sun);background:var(--sun-tint);padding:1rem 1.2rem;border-radius:0 12px 12px 0;margin:1.5rem 0}
.callout.info{border-color:var(--brand-2);background:var(--brand-tint)}
.callout p:last-child{margin:0}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1.2rem 1.3rem;position:sticky;top:90px}
.toc h2{font-family:var(--sans);font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 .6rem}
.toc ol{margin:0;padding-left:1.1rem;font-size:.92rem}
.toc li{margin-bottom:.35rem}
.aside-stack{display:grid;gap:1rem;align-content:start}
.aside-cta{background:var(--brand);color:#e4efec;border-radius:14px;padding:1.2rem 1.3rem}
.aside-cta h3{color:#fff;font-size:1.1rem}
.aside-cta p{font-size:.92rem}
.related{display:grid;gap:.6rem}
.author-box{display:flex;gap:1rem;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1.2rem;margin-top:2.5rem}
.avatar{flex:none;width:56px;height:56px;border-radius:50%;background:var(--brand-tint);display:grid;place-items:center;color:var(--brand);font-weight:700;font-family:var(--serif);font-size:1.2rem}
.disclaimer{font-size:.85rem;color:var(--muted);border-top:1px solid var(--line);padding-top:1rem;margin-top:2rem}

/* Listado categoría */
.post-list{display:grid;gap:.75rem}
.post-item{display:flex;justify-content:space-between;align-items:center;gap:1rem;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem}
.post-item h3{font-family:var(--sans);font-size:1rem;font-weight:600;margin:0}
.post-item a{text-decoration:none;color:var(--ink)}
.post-item a:hover{color:var(--brand-2)}
.post-item.pillar{border-color:var(--brand-2);box-shadow:inset 4px 0 0 var(--brand-2)}
.soon{font-size:.78rem;color:var(--muted);white-space:nowrap}

/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem;margin-bottom:.7rem}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;line-height:1;color:var(--brand-2)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:.75rem 0 0;color:var(--ink-soft)}

/* Página simple */
.page-hero{padding:2.75rem 0 1.5rem}
.page-hero p{max-width:44rem}
.legal{max-width:48rem;padding-bottom:3rem}
.legal h2{font-size:1.4rem;margin-top:2rem}

/* Pie */
.site-footer{background:#0b2b28;color:#b9cbc7;padding:3rem 0 1.5rem;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem}
.site-footer h3{font-family:var(--sans);font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:#fff;margin-bottom:.8rem}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.4rem}
.site-footer a{color:#b9cbc7;text-decoration:none}
.site-footer a:hover{color:#fff}
.site-footer .logo{color:#fff;margin-bottom:.75rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:2.25rem;padding-top:1.25rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;font-size:.83rem}
@media (max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}}

/* Cookies */
.cookie-bar{position:fixed;left:1rem;right:1rem;bottom:1rem;z-index:80;max-width:760px;margin-inline:auto;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 40px rgba(0,0,0,.15);padding:1.1rem 1.25rem;display:none;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cookie-bar.show{display:flex}
.cookie-bar p{margin:0;font-size:.9rem;flex:1 1 320px}
.cookie-bar .btns{display:flex;gap:.5rem;flex-wrap:wrap}
.cookie-bar .btn{padding:.6rem 1rem;font-size:.9rem}

/* Huecos publicitarios: reservan espacio para no empeorar el CLS */
.ad-slot{min-height:280px;margin:2rem 0;display:none}
.ads-on .ad-slot{display:block}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.logo svg{flex:none}

/* Ilustraciones de categoría */
.card-img{padding:0;overflow:hidden}
.card-img>img{width:100%;height:auto;aspect-ratio:1200/520;object-fit:cover;border-bottom:1px solid var(--line)}
.card-img .count{background:rgba(255,255,255,.92);padding:.1rem .5rem;border-radius:6px}
.card-img .icon{margin:1.1rem 1.35rem 0}
.card-img h3,.card-img p{margin-left:1.35rem;margin-right:1.35rem}
.card-img p{margin-bottom:1.35rem}
.cat-hero{display:grid;grid-template-columns:1fr 1.15fr;gap:2.5rem;align-items:center}
.cat-hero img{width:100%;height:auto;border-radius:20px;box-shadow:var(--shadow);border:1px solid var(--line)}
@media (max-width:900px){.cat-hero{grid-template-columns:1fr}.cat-hero img{order:-1}}
.article-img{width:100%;height:auto;border-radius:16px;border:1px solid var(--line);margin:0 0 1.75rem}
.byline a{color:inherit}