/* ==========================================================================
   TierrasFísicas — hoja de estilos compartida
   Paleta tomada de los materiales del oficio: bentonita, cobre, pátina,
   tierra y el amarillo de la cinta de señalización.
   ========================================================================== */

:root{
  --bentonita:#E9E4DA;
  --bentonita-claro:#F4F1EB;
  --tierra:#2A2118;
  --tierra-media:#5A4A38;
  --cobre:#B87333;
  --cobre-oscuro:#8E5322;
  --patina:#3F7A6B;
  --senal:#E4B303;
  --linea:rgba(42,33,24,.14);
  --linea-fuerte:rgba(42,33,24,.28);

  --display:'Bricolage Grotesque',system-ui,sans-serif;
  --cuerpo:'Public Sans',system-ui,sans-serif;
  --dato:'IBM Plex Mono',ui-monospace,monospace;

  --max:1180px;
  --r:3px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
body{font-family:var(--cuerpo);background:var(--bentonita);color:var(--tierra);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
.envoltura{max-width:var(--max);margin:0 auto;padding:0 24px}
.estrecho{max-width:760px}

h1,h2,h3{font-family:var(--display);font-weight:800;line-height:1.05;letter-spacing:-.025em}
h1{font-size:clamp(2.3rem,5.6vw,4.2rem)}
h2{font-size:clamp(1.8rem,3.6vw,2.7rem)}
h3{font-size:1.12rem;font-weight:600;letter-spacing:-.01em;line-height:1.25}

.rotulo{font-family:var(--dato);font-size:.7rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--tierra-media)}
.dato{font-family:var(--dato);font-variant-numeric:tabular-nums}

/* ---------- Barra de norma ---------- */
.barra-norma{background:var(--tierra);color:var(--bentonita);font-family:var(--dato);font-size:.72rem;letter-spacing:.09em;padding:9px 0;text-transform:uppercase}
.barra-norma .envoltura{display:flex;gap:22px;flex-wrap:wrap;align-items:center;justify-content:center}
.barra-norma b{color:var(--senal);font-weight:600}

/* ---------- Encabezado ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(233,228,218,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--linea)}
.cabecera{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0}
.marca{display:flex;align-items:center;gap:11px;text-decoration:none}
.marca-icono{width:34px;height:34px;flex:none;border:1.5px solid var(--tierra);border-radius:50%;display:grid;place-items:center;background:var(--cobre)}
.marca-icono i{display:block;width:2.5px;height:19px;background:var(--tierra);border-radius:2px}
.marca-txt{font-family:var(--display);font-weight:800;font-size:1.12rem;letter-spacing:-.03em;line-height:1}
.marca-txt small{display:block;font-family:var(--dato);font-weight:400;font-size:.6rem;letter-spacing:.13em;color:var(--tierra-media);text-transform:uppercase;margin-top:3px}
nav.principal{display:flex;gap:26px}
nav.principal a{font-size:.88rem;font-weight:500;text-decoration:none;padding:4px 0;border-bottom:2px solid transparent;transition:border-color .18s}
nav.principal a:hover,nav.principal a:focus-visible,nav.principal a[aria-current="page"]{border-bottom-color:var(--cobre)}
@media(max-width:940px){nav.principal{display:none}}

.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--cuerpo);font-weight:600;font-size:.92rem;padding:13px 22px;border-radius:var(--r);text-decoration:none;border:1.5px solid var(--tierra);cursor:pointer;transition:transform .15s,background .15s;background:transparent;color:var(--tierra)}
.btn:active{transform:translateY(1px)}
.btn-principal{background:var(--tierra);color:var(--bentonita)}
.btn-principal:hover{background:var(--cobre-oscuro);border-color:var(--cobre-oscuro)}
.btn-secundario:hover{background:rgba(42,33,24,.06)}
.btn-wa{background:var(--patina);border-color:var(--patina);color:#fff}
.btn-wa:hover{background:#356659;border-color:#356659}
.btn-sm{padding:9px 15px;font-size:.84rem}
@media(max-width:620px){.cabecera .btn-sm{display:none}}
:focus-visible{outline:3px solid var(--cobre);outline-offset:3px}

/* ---------- Secciones ---------- */
section{padding:74px 0}
.encabezado-seccion{max-width:62ch;margin-bottom:38px}
.encabezado-seccion h2{margin:12px 0 14px}
.encabezado-seccion p{color:var(--tierra-media);font-size:1.03rem}
.oscuro{background:var(--tierra);color:var(--bentonita)}
.oscuro .rotulo{color:var(--senal)}
.oscuro .encabezado-seccion p{color:rgba(233,228,218,.72)}
.claro{background:var(--bentonita-claro);border-top:1px solid var(--linea);border-bottom:1px solid var(--linea)}

/* ---------- Héroe ---------- */
.heroe{padding:60px 0 0;border-bottom:1px solid var(--linea)}
.heroe-rejilla{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
@media(max-width:940px){.heroe-rejilla{grid-template-columns:1fr;gap:36px}}
.heroe h1{margin:16px 0 0}
.heroe h1 em{font-style:normal;color:var(--cobre-oscuro)}
.heroe p.entrada{font-size:1.1rem;max-width:47ch;margin-top:20px;color:var(--tierra-media)}
.heroe-acciones{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.corte{width:100%;height:auto;display:block}
.corte .rotulo-svg{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;fill:#5A4A38}
.corte .ohm{font-family:'IBM Plex Mono',monospace;font-size:15px;font-weight:600;fill:#2A2118}
.varilla-anim{animation:hincar 1.4s cubic-bezier(.2,.7,.3,1) both}
@keyframes hincar{from{transform:translateY(-64px);opacity:0}to{transform:translateY(0);opacity:1}}

.cifras{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--linea);margin-top:54px}
@media(max-width:760px){.cifras{grid-template-columns:repeat(2,1fr)}}
.cifra{padding:22px 20px 26px;border-right:1px solid var(--linea)}
.cifra:last-child{border-right:0}
@media(max-width:760px){.cifra:nth-child(2){border-right:0}}
.cifra b{display:block;font-family:var(--display);font-weight:800;font-size:1.8rem;letter-spacing:-.03em;line-height:1}
.cifra span{display:block;font-size:.8rem;color:var(--tierra-media);margin-top:7px}

/* ---------- Encabezado de página interior ---------- */
.pagina-encabezado{padding:52px 0 40px;border-bottom:1px solid var(--linea)}
.pagina-encabezado h1{margin:14px 0 16px}
.pagina-encabezado p{max-width:58ch;color:var(--tierra-media);font-size:1.05rem}
.migas{font-family:var(--dato);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--tierra-media)}
.migas a{text-decoration:none}
.migas a:hover{color:var(--cobre-oscuro)}

/* ---------- Calculadora ---------- */
.calc{display:grid;grid-template-columns:1fr 1fr;border:1.5px solid rgba(233,228,218,.24)}
@media(max-width:900px){.calc{grid-template-columns:1fr}}
.calc-panel{padding:30px}
.calc-panel:first-child{border-right:1.5px solid rgba(233,228,218,.24)}
@media(max-width:900px){.calc-panel:first-child{border-right:0;border-bottom:1.5px solid rgba(233,228,218,.24)}}
.campo{margin-bottom:26px}
.campo>span.rotulo{display:block;margin-bottom:11px}
.opciones{display:flex;flex-wrap:wrap;gap:8px}
.opcion{font-family:var(--cuerpo);font-size:.86rem;font-weight:500;padding:9px 14px;border:1.5px solid rgba(233,228,218,.34);background:transparent;color:var(--bentonita);cursor:pointer;border-radius:var(--r);transition:background .15s,border-color .15s}
.opcion:hover{border-color:var(--senal)}
.opcion[aria-pressed="true"]{background:var(--senal);border-color:var(--senal);color:var(--tierra);font-weight:600}
.res-vacio{color:rgba(233,228,218,.5);font-size:.95rem;padding-top:6px}
.res-titulo{font-family:var(--display);font-weight:800;font-size:1.5rem;letter-spacing:-.02em}
.res-precio{font-family:var(--dato);font-size:1.75rem;font-weight:600;color:var(--senal);margin:14px 0 4px}
.res-lista{list-style:none;margin:16px 0 20px;border-top:1px solid rgba(233,228,218,.2)}
.res-lista li{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid rgba(233,228,218,.2);font-size:.9rem}
.res-lista li span:last-child{font-family:var(--dato);color:var(--senal);flex:none}
.res-nota{font-size:.84rem;color:rgba(233,228,218,.66);margin-bottom:20px;line-height:1.5}

/* ---------- Catálogo ---------- */
.filtros{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px}
.filtro{font-family:var(--dato);font-size:.75rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;padding:9px 15px;border:1.5px solid var(--linea-fuerte);background:transparent;color:var(--tierra-media);cursor:pointer;border-radius:var(--r);transition:all .15s}
.filtro:hover{border-color:var(--tierra)}
.filtro[aria-pressed="true"]{background:var(--tierra);border-color:var(--tierra);color:var(--bentonita)}
.rejilla-productos{display:grid;grid-template-columns:repeat(auto-fill,minmax(256px,1fr));gap:18px}
.producto{background:var(--bentonita-claro);border:1px solid var(--linea);padding:22px;display:flex;flex-direction:column;border-radius:var(--r);transition:border-color .18s,transform .18s}
.producto:hover{border-color:var(--cobre);transform:translateY(-2px)}
.producto .sku{font-family:var(--dato);font-size:.68rem;letter-spacing:.1em;color:var(--tierra-media);margin-bottom:10px}
.producto h3{margin-bottom:9px}
.producto p{font-size:.88rem;color:var(--tierra-media);flex:1;margin-bottom:18px}
.precio{font-family:var(--dato);font-size:1.28rem;font-weight:600;color:var(--cobre-oscuro)}
.precio small{display:block;font-size:.68rem;font-weight:400;color:var(--tierra-media);letter-spacing:.06em;margin-top:3px}
.producto .btn{margin-top:16px;justify-content:center}
.etiqueta{display:inline-block;font-family:var(--dato);font-size:.63rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:3px 8px;background:var(--senal);color:var(--tierra);border-radius:2px;margin-bottom:10px}
.etiqueta.mayoreo{background:var(--patina);color:#fff}
.vacio-catalogo{padding:40px;text-align:center;color:var(--tierra-media);border:1px dashed var(--linea-fuerte);grid-column:1/-1}

/* ---------- Muestrario de cintas ---------- */
.cintas{border:1px solid var(--linea);border-radius:var(--r);overflow:hidden}
.cinta-fila{display:grid;grid-template-columns:150px 1fr auto;gap:18px;align-items:center;padding:14px 18px;border-bottom:1px solid var(--linea);background:var(--bentonita-claro)}
.cinta-fila:last-child{border-bottom:0}
@media(max-width:640px){.cinta-fila{grid-template-columns:1fr;gap:9px}}
.muestra{height:26px;border-radius:2px;display:grid;place-items:center;font-family:var(--dato);font-size:.52rem;font-weight:600;letter-spacing:.08em;text-align:center;padding:0 6px;overflow:hidden;white-space:nowrap}
.cinta-fila b{font-size:.94rem;font-weight:600}
.cinta-fila span.desc{display:block;font-size:.82rem;color:var(--tierra-media);font-weight:400}
.cinta-fila .precio{font-size:1rem}

/* ---------- Pasos ---------- */
.pasos{list-style:none;counter-reset:p}
.pasos li{counter-increment:p;position:relative;padding:0 0 24px 52px;border-left:1.5px solid var(--linea-fuerte);margin-left:14px}
.pasos li:last-child{border-left-color:transparent;padding-bottom:0}
.pasos li::before{content:counter(p,decimal-leading-zero);position:absolute;left:-15px;top:-2px;width:29px;height:29px;background:var(--cobre);color:#fff;font-family:var(--dato);font-size:.72rem;font-weight:600;display:grid;place-items:center;border-radius:50%}
.pasos h3{margin-bottom:5px}
.pasos p{font-size:.9rem;color:var(--tierra-media)}
.inst-rejilla{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media(max-width:900px){.inst-rejilla{grid-template-columns:1fr;gap:32px}}
.tarjeta-precio{background:var(--tierra);color:var(--bentonita);padding:32px;border-radius:var(--r)}
.tarjeta-precio .rotulo{color:var(--senal)}
.tarjeta-precio h3{font-size:1.5rem;font-weight:800;margin:10px 0 18px}
.tarjeta-precio ul{list-style:none;margin-bottom:24px}
.tarjeta-precio li{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid rgba(233,228,218,.2);font-size:.92rem}
.tarjeta-precio li b{font-family:var(--dato);font-weight:600;color:var(--senal);flex:none}

/* ---------- Blog ---------- */
.rejilla-guias{display:grid;grid-template-columns:repeat(auto-fill,minmax(288px,1fr));gap:18px}
.guia{border:1px solid var(--linea);padding:24px;text-decoration:none;display:flex;flex-direction:column;background:var(--bentonita-claro);border-radius:var(--r);transition:border-color .18s}
.guia:hover{border-color:var(--cobre)}
.guia .rotulo{color:var(--cobre-oscuro)}
.guia h3{margin:11px 0 8px}
.guia p{font-size:.88rem;color:var(--tierra-media);flex:1}
.guia .flecha{font-family:var(--dato);font-size:.8rem;margin-top:14px;display:block;color:var(--cobre-oscuro)}
.guia.destacada{grid-column:span 2;background:var(--tierra);color:var(--bentonita);border-color:var(--tierra)}
.guia.destacada .rotulo{color:var(--senal)}
.guia.destacada p{color:rgba(233,228,218,.72)}
.guia.destacada .flecha{color:var(--senal)}
@media(max-width:720px){.guia.destacada{grid-column:span 1}}

/* ---------- Artículo ---------- */
.articulo{padding:0 0 74px}
.articulo-meta{display:flex;gap:16px;flex-wrap:wrap;font-family:var(--dato);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--tierra-media);margin-bottom:16px}
.articulo-cuerpo{max-width:68ch;font-size:1.06rem}
.articulo-cuerpo h2{font-size:1.7rem;margin:44px 0 14px}
.articulo-cuerpo h3{font-size:1.18rem;margin:30px 0 10px}
.articulo-cuerpo p{margin-bottom:18px}
.articulo-cuerpo ul,.articulo-cuerpo ol{margin:0 0 20px 22px}
.articulo-cuerpo li{margin-bottom:9px}
.articulo-cuerpo strong{font-weight:600}
.articulo-cuerpo a{color:var(--cobre-oscuro);font-weight:600}
.entradilla{font-size:1.16rem;color:var(--tierra-media);margin-bottom:30px;padding-bottom:26px;border-bottom:1px solid var(--linea)}
.tabla-envoltura{overflow-x:auto;margin-bottom:22px}
table{border-collapse:collapse;width:100%;font-size:.92rem;min-width:440px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--linea)}
th{font-family:var(--dato);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--tierra-media);border-bottom:1.5px solid var(--linea-fuerte)}
td.num{font-family:var(--dato);font-variant-numeric:tabular-nums}
.aviso{border-left:3px solid var(--senal);background:var(--bentonita-claro);padding:18px 22px;margin:26px 0;font-size:.98rem}
.aviso b{display:block;font-family:var(--dato);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--tierra-media);margin-bottom:7px}
.caja-producto{border:1.5px solid var(--cobre);background:var(--bentonita-claro);padding:24px;margin:32px 0;border-radius:var(--r)}
.caja-producto .rotulo{color:var(--cobre-oscuro)}
.caja-producto h3{margin:9px 0 8px}
.caja-producto p{font-size:.92rem;color:var(--tierra-media);margin-bottom:16px}

/* ---------- Envío ---------- */
.rejilla-envio{display:grid;grid-template-columns:repeat(auto-fit,minmax(212px,1fr));gap:1px;background:rgba(233,228,218,.2);border:1px solid rgba(233,228,218,.2)}
.celda-envio{background:var(--tierra);padding:26px}
.celda-envio b{display:block;font-family:var(--display);font-size:1.26rem;font-weight:800;margin-bottom:7px}
.celda-envio p{font-size:.88rem;color:rgba(233,228,218,.7)}

/* ---------- Formulario ---------- */
.form-rejilla{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:700px){.form-rejilla{grid-template-columns:1fr}}
.campo-form{display:flex;flex-direction:column;gap:7px}
.campo-form.ancho{grid-column:1/-1}
.campo-form label{font-family:var(--dato);font-size:.72rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--tierra-media)}
.campo-form input,.campo-form select,.campo-form textarea{font-family:var(--cuerpo);font-size:.95rem;padding:12px 14px;border:1.5px solid var(--linea-fuerte);background:var(--bentonita-claro);color:var(--tierra);border-radius:var(--r)}
.campo-form textarea{min-height:96px;resize:vertical}

/* ---------- Pie ---------- */
footer{background:var(--tierra);color:rgba(233,228,218,.72);padding:54px 0 30px;font-size:.88rem}
.pie-rejilla{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-bottom:34px;border-bottom:1px solid rgba(233,228,218,.18)}
@media(max-width:860px){.pie-rejilla{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.pie-rejilla{grid-template-columns:1fr;gap:26px}}
footer h4{font-family:var(--dato);font-size:.72rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--senal);margin-bottom:14px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a{text-decoration:none}
footer a:hover{color:var(--senal)}
.pie-base{padding-top:22px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:.78rem;color:rgba(233,228,218,.5)}

.flotante{position:fixed;right:18px;bottom:18px;z-index:70;box-shadow:0 6px 22px rgba(42,33,24,.3)}