/* Limpiacisternas · estilos compartidos (index, agua, cloro) */
:root{--bg:#f6f9fb;--sf:#fff;--tx:#0f2038;--mut:#566b7d;--bd:#dbe5ec;--navy:#0f2038;--ac:#1fb5c9;--acd:#0b7f90;--hi:#7fe3f0;--tint:#e4f6f9;--warn:#fff6e0;--warnt:#6b4a00;--line:#c9d7e0;--err:#c0392b}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0a1522;--sf:#101f31;--tx:#e8f1f6;--mut:#9bb0be;--bd:#223a50;--acd:#4fd0e2;--tint:#0f2c3a;--warn:#3a2f10;--warnt:#ffe2a0;--err:#ff8a7a}}
:root[data-theme="dark"]{--bg:#0a1522;--sf:#101f31;--tx:#e8f1f6;--mut:#9bb0be;--bd:#223a50;--acd:#4fd0e2;--tint:#0f2c3a;--warn:#3a2f10;--warnt:#ffe2a0;--err:#ff8a7a}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--tx);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:inherit}
p{margin:0 0 14px}
img{max-width:100%}
.w{max-width:1080px;margin:0 auto;padding:0 clamp(20px,5vw,40px)}

/* Tipografía */
.ey{letter-spacing:.14em;text-transform:uppercase;font-size:.78rem;color:var(--hi);font-weight:700;margin:0 0 14px}
h1{font-size:clamp(2rem,6vw,3.3rem);line-height:1.1;margin:0 0 16px;font-weight:700;letter-spacing:-.02em;max-width:16em}
.lead{font-size:1.15rem;color:#cfe0e8;max-width:36em;margin:0 0 26px}
h2{font-size:clamp(1.6rem,4.5vw,2.4rem);line-height:1.15;margin:4px 0 14px;letter-spacing:-.015em}
h3{font-size:1.15rem;margin:0 0 6px}
.sub{color:var(--mut);max-width:40em;margin:0 0 38px}
.mut{color:var(--mut)}

/* Botones (formato de index.html) */
.btns{display:flex;flex-wrap:wrap;gap:12px}
.b{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 26px;border-radius:99px;font-family:inherit;font-weight:700;font-size:1rem;line-height:1.2;text-decoration:none;border:1px solid transparent;cursor:pointer}
.b svg,.fab svg{width:1.3em;height:1.3em;flex:none;fill:#25D366}
.b.wa{background:#fff;color:#0f2038;border-color:var(--line)}
.b.pr{background:var(--navy);color:#fff;border-color:var(--navy)}
.b.gh{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.45)}
.b.full{width:100%}
.fab{display:inline-flex;align-items:center;gap:8px;position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:20;background:#fff;color:#0f2038;border:1px solid var(--line);font-weight:800;text-decoration:none;padding:14px 20px;border-radius:99px;box-shadow:0 6px 20px rgba(0,0,0,.3)}

/* Barra superior y hero de páginas internas */
.top{background:var(--navy);color:#fff;position:sticky;top:0;z-index:10;padding-top:env(safe-area-inset-top,0px)}
.top .w{display:flex;align-items:center;justify-content:space-between;height:62px}
.top img{height:40px;width:auto;display:block;filter:brightness(0) invert(1)}
.pill{color:#fff;text-decoration:none;font-weight:600;font-size:.92rem;border:1px solid rgba(255,255,255,.5);padding:8px 15px;border-radius:99px}
.phero{background:var(--navy);color:#fff;padding:56px 0 48px}

/* Secciones y tarjetas */
section{padding:72px 0}
.alt{background:var(--sf);border-block:1px solid var(--bd)}
.card{background:var(--sf);border:1px solid var(--bd);border-radius:16px;padding:24px}
.alt .card{background:var(--bg)}
.card h3{margin:0 0 8px}
.card p{margin:0;color:var(--mut);font-size:.97rem}
.g2,.g3{display:grid;gap:16px;margin:22px 0}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.big{background:var(--tint);border:1px solid var(--ac);border-radius:16px;padding:24px;margin:24px 0}
.big>b{font-size:1.25rem;display:block;margin-bottom:6px}
.big p{margin:0}
.warn{background:var(--warn);color:var(--warnt);border-radius:12px;padding:14px 16px;font-size:.95rem;margin:20px 0}
ul.l{padding-left:20px;margin:8px 0 14px}
ul.l li{margin-bottom:6px}

/* Llamado a la acción */
.cta{background:var(--navy);color:#fff}
.cta h2{color:#fff}
.cta .sub,.cta p{color:#b9cdd8}
.cta.c{text-align:center}
.cta.c p{max-width:34em;margin:0 auto 24px}
.cta.c .btns{justify-content:center}

/* Pie de página */
footer{background:#08111e;color:#9bb0be;padding:32px 0;font-size:.88rem}
footer .w{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
footer img{height:36px;width:auto;filter:brightness(0) invert(1);display:block}
footer a{color:#cfe3ec}
footer .fl{display:flex;flex-wrap:wrap;gap:6px 16px}

/* En modo oscuro el botón primario usa el acento para no perderse sobre el fondo */
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .b.pr{background:var(--ac);color:#06222f;border-color:var(--ac)}}
:root[data-theme="dark"] .b.pr{background:var(--ac);color:#06222f;border-color:var(--ac)}

@media (max-width:780px){
  .g2,.g3{grid-template-columns:1fr}
  section{padding:52px 0}
  .phero{padding:40px 0 36px}
}

/* Formulario de cotización (index y contacto) */
[hidden]{display:none!important}
.qf{background:var(--sf);color:var(--tx);border:1px solid var(--bd);border-radius:18px;padding:24px;display:grid;gap:12px}
.qf label{font-size:.82rem;font-weight:700;display:grid;gap:5px}
.qf input,.qf select,.qf textarea{font:inherit;font-size:1rem;padding:12px;border:1px solid var(--bd);border-radius:10px;background:var(--bg);color:var(--tx);width:100%}
.qf textarea{min-height:84px;resize:vertical}
.qf .b{flex:1}
.qf .note,.qf .fine{font-size:.8rem;color:var(--mut);margin:0}
.qf .note{margin-top:-4px}
.qty{display:flex;align-items:center;justify-content:space-between;gap:12px}
.qty>span{font-weight:700}
.qty small{display:block;font-weight:500;font-size:.78rem;color:var(--mut)}
.step{display:flex;align-items:center;border:1px solid var(--bd);border-radius:12px;background:var(--sf);overflow:hidden}
.step button{width:44px;height:44px;border:0;background:transparent;color:var(--tx);font-size:1.4rem;cursor:pointer}
.qf .step input{width:52px;border:0;border-radius:0;text-align:center;font-weight:800;font-size:1.15rem;padding:8px 0;background:transparent;-moz-appearance:textfield}
.step input::-webkit-inner-spin-button,.step input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.seg{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.seg>span{font-size:.82rem;font-weight:700;flex-basis:100%}
.qf .seg label{display:flex;align-items:center;gap:8px;flex:1;font-size:.95rem;border:1px solid var(--bd);background:var(--sf);border-radius:10px;padding:10px 12px;cursor:pointer}
.qf .seg input{width:auto;accent-color:var(--acd)}
.seg label:has(input:checked){border-color:var(--ac);box-shadow:0 0 0 1px var(--ac)}
.price{display:grid;grid-template-columns:auto 1fr;align-items:baseline;gap:2px 12px;background:var(--sf);border-radius:12px;padding:12px 14px}
.price span{font-size:.82rem;font-weight:700;color:var(--mut)}
.price b{font-size:1.8rem;font-weight:800;text-align:right}
.price small{grid-column:1/-1;font-size:.82rem;color:var(--mut);white-space:pre-line}
.qf ul.notes{margin:0;padding-left:18px;font-size:.82rem;color:var(--mut)}
.qf ul.notes li{margin-bottom:4px}
.lnk{background:none;border:0;padding:0;font:inherit;color:var(--acd);text-decoration:underline;cursor:pointer;font-weight:700}

/* Cinturón "Más información": temas y herramientas (la lista vive en lc.js → TEMAS) */
.belt{background:var(--sf);border-top:1px solid var(--bd);min-height:68px}
.belt .w{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding-block:12px}
.belt .lbl{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mut);font-weight:700;white-space:nowrap;margin-right:6px}
.belt a{display:flex;flex-direction:column;flex:none;text-decoration:none;white-space:nowrap;padding:7px 14px;border:1px solid var(--bd);border-radius:12px;font-size:.88rem;font-weight:700;line-height:1.3;color:var(--tx);background:var(--bg)}
.belt a small{font-weight:500;color:var(--mut);font-size:.74rem}
.belt a:hover,.belt a:focus-visible{border-color:var(--ac)}
.belt a[aria-current]{border-color:var(--ac);background:var(--tint)}