/* Layout: cabecera simple, portada con texto a la izquierda y el display de una caldera a la derecha, banda azul marino para Peisa, secciones claras alternadas, banda final de contacto. */
:root{
  color-scheme:light;
  --bg:#EEF2F6; --surface:#FFFFFF; --ink:#0F2236; --muted:#4D6074; --line:#D0DAE5;
  --blue:#1B5BC4; --red:#C82B25; --wa:#0F7A40; --wa-ink:#FFFFFF;
  --panel:#0E2A47; --panel-ink:#EAF2FB; --panel-muted:#A9BED3; --panel-line:#2A4C70;
  --wa-dark:#2BD068; --wa-dark-ink:#06210F;
  --wall:#C8D1DA; --brand-black:#0A0A0A; --brand-ink:#E8ECF2; --brand-muted:#AEB9C8; --brand-red:#E20A0A; --brand-blue:#400AE2;
  --lcd-bg:#061726; --lcd-top:#0B2640; --lcd-bezel:#0A1F33; --lcd-warn:#FFB347; --lcd-glow:#7FD1FF; --lcd-ok:#6EE7A8;
  --font-display:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-body:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-lcd:"Share Tech Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#09131E; --surface:#102033; --ink:#E8EFF7; --muted:#9FB3C8; --line:#213649;
    --blue:#6AA6FF; --red:#FF7B70; --wa:#2BD068; --wa-ink:#06210F; --panel:#11335A; --wall:#1A2B3C;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#09131E; --surface:#102033; --ink:#E8EFF7; --muted:#9FB3C8; --line:#213649;
  --blue:#6AA6FF; --red:#FF7B70; --wa:#2BD068; --wa-ink:#06210F; --panel:#11335A; --wall:#1A2B3C;
  color-scheme:dark;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(84px + env(safe-area-inset-top,0px))}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:1rem;line-height:1.55;-webkit-text-size-adjust:100%}
a{color:inherit}
h1,h2,h3{font-family:var(--font-display);font-stretch:70%;font-weight:800;line-height:1;margin:0;text-wrap:balance}
h1{font-size:clamp(2.6rem,9.5vw,4.7rem)}
h2{font-size:clamp(2.1rem,6.5vw,3.2rem)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.sec{padding-block:clamp(48px,9vw,96px)}
.sec-surface{background:var(--surface)}
.sec-panel{background:var(--panel);color:var(--panel-ink)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}

/* Botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6em;min-height:54px;padding:0 24px;border-radius:12px;border:2px solid transparent;font:700 1.05rem/1 var(--font-body);text-decoration:none;cursor:pointer;transition:transform .15s ease,background .15s ease}
.btn:hover{transform:translateY(-2px)}
.btn svg{width:1.3em;height:1.3em;fill:currentColor;flex:none}
.btn-wa{background:var(--wa);color:var(--wa-ink)}
.btn-ghost{border-color:var(--ink);color:var(--ink)}
.btn.small{min-height:42px;padding:0 16px;font-size:.95rem}
.sec-panel .btn-wa,.top .btn-wa{background:var(--wa-dark);color:var(--wa-dark-ink)}
.sec-panel .btn-ghost{border-color:var(--panel-ink);color:var(--panel-ink)}

/* Cabecera */
.stripe{height:6px;background:linear-gradient(90deg,var(--brand-blue),var(--brand-red))}
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:var(--brand-black)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:31;background:var(--bg)}
.bar{display:flex;align-items:center;gap:20px;padding-block:14px}
.logo{display:block;flex:0 1 auto;min-width:0;line-height:0}
.logo img{display:block;width:clamp(150px,52vw,250px);height:auto}
.bar>.btn{margin-left:auto}
.nav{display:none;gap:22px}
.nav a{text-decoration:none;font-weight:600;color:var(--brand-muted)}
.nav a:hover{color:#fff;text-decoration:underline;text-underline-offset:6px}
@media (min-width:960px){
  .nav{display:flex;margin-left:auto}
  .bar>.btn{margin-left:0}
}

/* Portada */
.hero{padding-block:clamp(32px,7vw,76px)}
.hero-grid{display:grid;gap:36px}
.hero-grid>*{min-width:0}
@media (min-width:880px){.hero-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:56px;align-items:center}}
.lead{font-size:clamp(1.1rem,2.6vw,1.3rem);color:var(--muted);max-width:34em;margin-top:20px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.num{margin-top:16px;color:var(--muted);font-size:.95rem}
.num b{color:var(--ink);font-variant-numeric:tabular-nums}

/* Panel de caldera */
.lcd-wrap{margin:0}
.wall{background:var(--wall);border-radius:24px;padding:clamp(14px,4vw,24px)}
.panel-svg{display:block;width:100%;height:auto;filter:drop-shadow(0 12px 14px rgba(0,0,0,.28))}
.seg{fill:#0F2A18}
.seg.on{fill:#57FF7A;filter:drop-shadow(0 0 3px rgba(87,255,122,.9))}
.led-blue.on{fill:#3AA0FF}
#lcd[data-state="fault"] .digits{animation:blink 1.1s step-end infinite}
#lcd[data-state="diag"] .digits{animation:blink .6s step-end infinite}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:.15}}
.lcd-status{margin-top:18px;font-size:1.15rem;font-weight:700;min-height:1.6em}
.lcd-steps{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:8px;font-size:.95rem;color:var(--muted)}
.lcd-steps li{display:flex;align-items:center}
.lcd-steps li::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--line);margin-right:8px;transition:background .3s}
#lcd[data-state="fault"] [data-s="fault"],#lcd[data-state="diag"] [data-s="diag"],#lcd[data-state="ok"] [data-s="ok"]{color:var(--ink);font-weight:600}
#lcd[data-state="fault"] [data-s="fault"]::before{background:var(--red)}
#lcd[data-state="diag"] [data-s="diag"]::before{background:var(--blue)}
#lcd[data-state="ok"] [data-s="ok"]::before{background:var(--wa)}
.lcd-wrap figcaption{margin-top:14px;color:var(--muted);font-size:.98rem;max-width:30em}

/* Peisa */
.split{display:grid;gap:32px}
.split>*{min-width:0}
@media (min-width:880px){.split{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:72px}}
.split p{color:var(--panel-muted);font-size:1.15rem;margin-top:18px;max-width:28em}
.faults li{padding:20px 0;border-top:1px solid var(--panel-line)}
.faults li:last-child{border-bottom:1px solid var(--panel-line)}
.faults b{display:block;font-size:1.2rem;margin-bottom:4px}
.faults span{color:var(--panel-muted)}

/* Marcas */
.brands{display:flex;flex-wrap:wrap;align-items:center;gap:10px 36px;margin-top:28px}
.brands li{font-family:var(--font-display);font-stretch:70%;font-weight:800;font-size:clamp(2rem,6.5vw,3rem);line-height:1.1}
.tag{display:inline-block;margin-left:12px;padding:6px 11px;border:1.5px solid var(--blue);border-radius:999px;color:var(--blue);font:600 .82rem/1 var(--font-body);font-stretch:100%;vertical-align:middle}

/* Filas */
.rows{margin-top:32px;border-top:1px solid var(--line)}
.rows li{display:grid;gap:4px 32px;padding:22px 0;border-bottom:1px solid var(--line)}
.rows li>*{min-width:0}
@media (min-width:760px){.rows li{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);align-items:baseline}}
.rt{font-family:var(--font-display);font-stretch:72%;font-weight:700;font-size:1.65rem;line-height:1.1}
.rd{color:var(--muted)}
.note{margin-top:18px;color:var(--muted)}

/* Experiencia */
.exp{display:grid;gap:24px 56px;align-items:center}
.exp>*{min-width:0}
@media (min-width:700px){.exp{grid-template-columns:auto minmax(0,1fr)}}
.big{font-family:var(--font-display);font-stretch:62%;font-weight:800;font-size:clamp(6.5rem,30vw,11.5rem);line-height:.85;color:var(--blue);font-variant-numeric:tabular-nums}
.big::before{content:"";display:block;width:60px;height:6px;background:var(--red);margin-bottom:16px}
.exp p{color:var(--muted);font-size:1.15rem;margin-top:16px;max-width:30em}

/* Cómo trabajamos */
.steps{display:grid;gap:28px;margin-top:36px}
@media (min-width:760px){.steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:36px}}
.steps li{border-top:3px solid var(--ink);padding-top:16px}
.n{display:block;font-family:var(--font-display);font-stretch:62%;font-weight:800;font-size:3rem;line-height:1;color:var(--red)}
.steps b{display:block;font-size:1.2rem;margin:10px 0 4px}
.steps span.d{color:var(--muted)}

/* Contacto */
.cta .lead{color:var(--panel-muted)}
.opts{display:flex;flex-wrap:wrap;gap:10px;border:0;padding:0;margin:28px 0 0;min-width:0}
.opt{position:relative}
.opt input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer}
.opt span{display:inline-flex;align-items:center;min-height:48px;padding:0 20px;border:2px solid var(--panel-line);border-radius:999px;font-weight:600;transition:background .15s,color .15s,border-color .15s}
.opt input:checked+span{background:var(--panel-ink);border-color:var(--panel-ink);color:var(--panel)}
.opt input:focus-visible+span{outline:3px solid var(--panel-ink);outline-offset:3px}
.cta .cta-row{margin-top:24px}
.cta .num{color:var(--panel-muted)}
.cta .num b{color:var(--panel-ink)}

/* Pie */
.foot{background:var(--brand-black);padding-block:40px 120px;color:var(--brand-muted);font-size:.92rem}
.foot .logo{margin-bottom:18px}
.foot p{max-width:40em;margin-top:8px}
.foot a{color:var(--brand-ink)}
.foot .credit{margin-top:18px;padding-top:18px;border-top:1px solid var(--panel-line)}
.foot .credit a{font-weight:600;text-underline-offset:3px}
.top :focus-visible,.foot :focus-visible{outline-color:#fff}

/* Botón flotante */
.float{position:fixed;right:calc(16px + env(safe-area-inset-right,0px));bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:20;display:flex;align-items:center;justify-content:center;width:62px;height:62px;border-radius:50%;background:#25D366;color:#fff;box-shadow:0 10px 26px rgba(0,0,0,.28);transition:transform .15s ease;animation:ring 1.6s ease-out 3s 3}
.float:hover{transform:scale(1.06)}
.float svg{width:36px;height:36px;fill:currentColor}
@keyframes ring{0%{box-shadow:0 0 0 0 rgba(37,211,102,.6)}100%{box-shadow:0 0 0 20px rgba(37,211,102,0)}}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* Enlaces a las páginas del sitio */
.faults a{color:inherit;text-decoration:underline;text-decoration-color:var(--panel-line);text-decoration-thickness:2px;text-underline-offset:5px}
.faults a:hover{text-decoration-color:currentColor}
.brands a,.rt a{color:inherit;text-decoration:underline;text-decoration-color:var(--line);text-decoration-thickness:3px;text-underline-offset:8px}
.rt a{text-decoration-thickness:2px;text-underline-offset:6px}
.brands a:hover,.rt a:hover{color:var(--blue);text-decoration-color:currentColor}
.note a{color:var(--blue)}

/* Problemas y aviso de gas */
.issues{margin-top:28px;display:grid;gap:0 48px;border-top:1px solid var(--line)}
@media (min-width:760px){.issues{grid-template-columns:repeat(2,minmax(0,1fr))}}
.issues li{padding:16px 0;border-bottom:1px solid var(--line);font-size:1.08rem}
.aviso{margin-top:28px;padding:18px 20px;border:2px solid var(--red);border-radius:12px;background:color-mix(in srgb,var(--red) 9%,var(--surface));max-width:48em}

/* Galería */
.gal{margin-top:28px;column-count:2;column-gap:14px}
@media (min-width:760px){.gal{column-count:3}}
@media (min-width:1040px){.gal{column-count:4}}
.gal figure{margin:0 0 16px;break-inside:avoid}
.gal img{display:block;width:100%;height:auto;border-radius:10px;background:var(--line)}
.gal figcaption{margin-top:6px;font-size:.88rem;color:var(--muted)}

/* Preguntas frecuentes */
.faq{margin-top:28px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{position:relative;cursor:pointer;list-style:none;padding:20px 44px 20px 0;font-weight:700;font-size:1.12rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:1.7rem;font-weight:400;color:var(--blue)}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding:0 0 22px;color:var(--muted);max-width:42em}

/* Pie con columnas */
.foot-cols{display:grid;gap:28px;margin:4px 0 8px}
.foot-cols>*{min-width:0}
@media (min-width:760px){.foot-cols{grid-template-columns:1.2fr 1fr 1fr}}
.foot-cols b{display:block;margin-bottom:8px;color:var(--brand-ink)}
.foot-cols .links a{display:block;padding:4px 0}