/* =========================================================
   Ejemplo: Herrería El Yunque
   Negro de taller, gris de lámina y el azul del arco de
   soldadura para lo que se toca. Letra de rótulo pintado,
   todo cuadrado: aquí nada es curvo.
   ========================================================= */
:root{
  --negro:    #111213;
  --negro-2:  #1B1D1F;
  --lamina:   #EDEDEA;
  --lamina-2: #DCDCD7;
  --gris:     #55585C;   /* 6.8:1 sobre lámina */
  --azul:     #2F6FE4;
  --azul-os:  #1B4EAE;   /* 5.3:1 sobre lámina, para letra */
  --verde:    #128C4A;
  --linea:    rgba(17,18,19,.16);
  --f-titulo: "Bebas Neue", "Arial Narrow", system-ui, sans-serif;
  --f-texto:  "Inter", "Segoe UI", system-ui, sans-serif;
  --r: 2px;
  --max: 1150px;
  --pad: clamp(1.1rem, 4vw, 2.2rem);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; scroll-padding-top:78px; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }
body{ margin:0; background:var(--lamina); color:var(--gris);
  font-family:var(--f-texto); font-size:1.02rem; line-height:1.65; overflow-x:hidden; }
img{ display:block; max-width:100%; height:auto; }
h1,h2,h3{ margin:0; font-family:var(--f-titulo); font-weight:400; color:var(--negro);
  line-height:.98; letter-spacing:.02em; text-wrap:balance; }
h1{ font-size:clamp(3rem, 7vw, 5.2rem); }
h2{ font-size:clamp(2.2rem, 4.6vw, 3.4rem); }
h3{ font-size:1.5rem; }
p{ margin:0 0 1rem; text-wrap:pretty; }
ul,ol{ margin:0; padding:0; list-style:none; }
a{ color:inherit; }
button,select,input,legend{ font:inherit; color:inherit; }
:focus-visible{ outline:3px solid var(--azul); outline-offset:3px; }
.wrap{ width:100%; max-width:var(--max); margin-inline:auto; padding-inline:var(--pad); }
.wrap--angosto{ max-width:760px; }
.ico{ width:20px; height:20px; flex:none; fill:none; stroke:currentColor;
  stroke-width:1.7; stroke-linecap:round; stroke-linejoin:round; }
.mini{ font-size:.86rem; }

.sobre{ margin:0 0 .7rem; font-family:var(--f-texto); font-weight:700; font-size:.74rem;
  letter-spacing:.18em; text-transform:uppercase; color:var(--azul-os); }
.sobre--claro{ color:#8FB6F5; }
.seccion{ padding:clamp(3rem, 7vw, 5rem) 0; }
.seccion--gris{ background:var(--lamina-2); }
.sec-head{ max-width:640px; margin:0 auto clamp(1.8rem,4vw,2.6rem); text-align:center; }

/* ---------- Botones ---------- */
.btn{
  --bg:var(--azul); --fg:#fff; --bd:transparent; --bg-h:#1B4EAE;
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  min-height:50px; padding:.8rem 1.6rem;
  background:var(--bg); color:var(--fg); border:2px solid var(--bd); border-radius:var(--r);
  font-family:var(--f-texto); font-weight:700; font-size:.88rem; letter-spacing:.06em;
  text-transform:uppercase; text-decoration:none; cursor:pointer;
  transition:background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover{ background:var(--bg-h); }
.btn--grande{ min-height:56px; padding:1rem 1.8rem; font-size:.94rem; }
.btn--bloque{ width:100%; }
.btn--linea{ --bg:transparent; --fg:#fff; --bd:rgba(255,255,255,.5); --bg-h:rgba(255,255,255,.14); }
.btn--linea:hover{ border-color:#fff; }
.btn--wa{ --bg:var(--verde); --fg:#fff; --bg-h:#0E7A3F; }
.btn .ico[href$="i-wa"]{ fill:currentColor; stroke:none; }

/* ---------- Cabecera ---------- */
.cabecera{ position:sticky; top:0; z-index:100; background:var(--negro); color:#fff;
  border-bottom:3px solid var(--azul); }
.cabecera__inner{ display:flex; align-items:center; gap:1.2rem; min-height:72px; }
.marca{ display:flex; align-items:center; gap:.7rem; text-decoration:none; color:#fff; }
.marca__ico{ display:grid; place-items:center; width:40px; height:40px; background:var(--azul);
  border-radius:var(--r); }
.marca__txt{ display:flex; flex-direction:column; font-family:var(--f-titulo); font-size:1.7rem;
  line-height:.9; letter-spacing:.04em; }
.marca__txt small{ font-family:var(--f-texto); font-weight:500; font-size:.62rem;
  letter-spacing:.16em; text-transform:uppercase; color:#8FB6F5; margin-top:.25rem; }
.nav{ display:flex; align-items:center; gap:1.5rem; margin-left:auto; }
.nav a{ text-decoration:none; color:rgba(255,255,255,.82); font-weight:600; font-size:.82rem;
  letter-spacing:.1em; text-transform:uppercase; }
.nav a:not(.btn):hover{ color:#8FB6F5; }
.nav a.nav__cta{ color:var(--fg); min-height:42px; padding:.5rem 1.1rem; font-size:.78rem; }
.nav-toggle{ display:none; margin-left:auto; width:44px; height:44px; padding:11px;
  background:transparent; border:1px solid rgba(255,255,255,.35); border-radius:var(--r); cursor:pointer; }
.nav-toggle span{ display:block; height:2px; background:#fff;
  transition:transform .25s ease, opacity .2s ease; }
.nav-toggle span + span{ margin-top:5px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }
@media (max-width:900px){
  .nav-toggle{ display:block; }
  .nav{ position:absolute; left:0; right:0; top:100%; flex-direction:column; align-items:stretch; gap:0;
    background:var(--negro); border-bottom:3px solid var(--azul); padding:.4rem var(--pad) 1.1rem;
    max-height:0; overflow:hidden; visibility:hidden; transition:max-height .3s ease, visibility 0s linear .3s; }
  .nav.is-abierto{ max-height:80vh; visibility:visible; transition:max-height .35s ease, visibility 0s; }
  .nav a{ padding:.95rem 0; border-bottom:1px solid rgba(255,255,255,.14); }
  .nav a.nav__cta{ margin-top:.9rem; border-bottom:0; }
}

/* ---------- Hero ---------- */
.hero{ position:relative; isolation:isolate; overflow:hidden; display:flex; align-items:center;
  min-height:clamp(520px, 80vh, 700px); padding:clamp(3rem,7vw,5rem) 0; color:#fff; }
.hero__foto{ position:absolute; inset:0; z-index:-1; }
.hero__foto img{ width:100%; height:100%; object-fit:cover; }
.hero::after{ content:""; position:absolute; inset:0; z-index:0;
  background:linear-gradient(92deg, rgba(17,18,19,.95) 0%, rgba(17,18,19,.86) 45%, rgba(17,18,19,.45) 85%, rgba(17,18,19,.3) 100%); }
.hero__inner{ position:relative; z-index:1; max-width:640px; }
.hero h1{ color:#fff; }
.hero .lede{ margin:1.2rem 0 1.9rem; font-size:1.08rem; max-width:48ch; color:rgba(255,255,255,.88); }
.hero__acciones{ display:flex; flex-wrap:wrap; gap:.7rem; }
.hero__datos{ display:flex; flex-wrap:wrap; gap:.6rem 1.6rem; margin-top:2rem; font-size:.93rem;
  color:rgba(255,255,255,.86); }
.hero__datos li{ display:inline-flex; align-items:center; gap:.5rem; }
.hero__datos .ico{ color:#8FB6F5; }
@media (max-width:560px){ .hero__acciones .btn{ width:100%; } }

/* ---------- Trabajos ---------- */
.trabajos{ display:grid; gap:1rem; grid-template-columns:repeat(auto-fit, minmax(240px,1fr)); }
.trabajo{ background:#fff; border:1px solid var(--linea); border-radius:var(--r);
  border-top:4px solid var(--azul); padding:1.5rem 1.4rem; }
.trabajo__ico{ display:grid; place-items:center; width:46px; height:46px; margin-bottom:1rem;
  background:var(--lamina-2); border-radius:var(--r); color:var(--negro); }
.trabajo h3{ margin-bottom:.35rem; }
.trabajo p{ margin:0; font-size:.95rem; }

/* ---------- Calculadora ---------- */
.calculadora{ background:var(--negro); color:rgba(255,255,255,.82); padding:clamp(3rem,7vw,5rem) 0; }
.calculadora__inner{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(1.8rem,4vw,3.4rem);
  align-items:start; }
.calculadora h2{ color:#fff; }
.lista-check{ display:grid; gap:.55rem; margin-top:1.2rem; }
.lista-check li{ position:relative; padding-left:1.8rem; }
.lista-check li::before{ content:""; position:absolute; left:.15rem; top:.55em; width:.8rem; height:.42rem;
  border-left:2.5px solid var(--azul); border-bottom:2.5px solid var(--azul); transform:rotate(-45deg); }
.lista-check--oscura li::before{ border-color:var(--azul-os); }
.calculadora__foto{ display:block; margin-top:1.8rem; border-radius:var(--r); overflow:hidden; }
.calculadora__foto img{ width:100%; aspect-ratio:4/3; object-fit:cover; }
@media (max-width:900px){ .calculadora__foto{ display:none; } }

.calculadora__caja{ background:var(--negro-2); border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r); padding:clamp(1.3rem,3vw,1.9rem); }
.campo{ margin:0 0 1.2rem; padding:0; border:0; }
.campo legend, .campo > span{ display:block; margin-bottom:.55rem; padding:0;
  font-weight:700; font-size:.78rem; letter-spacing:.12em; text-transform:uppercase; color:#fff; }
.opciones{ display:grid; grid-template-columns:repeat(2,1fr); gap:.5rem; }
.opciones label{ position:relative; }
.opciones input{ position:absolute; opacity:0; width:100%; height:100%; margin:0; cursor:pointer; }
.opciones span{ display:block; min-height:48px; padding:.7rem 1rem; text-align:center;
  background:var(--negro); border:1.5px solid rgba(255,255,255,.24); border-radius:var(--r);
  font-weight:600; font-size:.92rem; color:#fff; cursor:pointer;
  transition:background .2s, border-color .2s; }
.opciones input:checked + span{ background:var(--azul); border-color:var(--azul); }
.opciones input:focus-visible + span{ outline:3px solid var(--azul); outline-offset:2px; }
.campo--medidas{ display:flex; align-items:flex-end; gap:.7rem; }
.campo--medidas label{ flex:1; display:flex; flex-direction:column; gap:.4rem;
  font-weight:700; font-size:.78rem; letter-spacing:.12em; text-transform:uppercase; color:#fff; }
.campo--medidas small{ font-weight:400; letter-spacing:.06em; color:rgba(255,255,255,.55); }
.campo--medidas input{ min-height:52px; padding:.6rem .8rem; background:var(--negro);
  border:1.5px solid rgba(255,255,255,.24); border-radius:var(--r); color:#fff;
  font-family:var(--f-titulo); font-size:1.8rem; letter-spacing:.04em; }
.por{ padding-bottom:.9rem; font-family:var(--f-titulo); font-size:1.6rem; color:rgba(255,255,255,.5); }
.campo select{ width:100%; min-height:50px; padding:.65rem .9rem; background:var(--negro);
  border:1.5px solid rgba(255,255,255,.24); border-radius:var(--r); color:#fff; font-weight:400; }

.salida{ margin:1.4rem 0; padding:1.2rem; text-align:center;
  background:rgba(47,111,228,.14); border:1px solid rgba(47,111,228,.45); border-radius:var(--r); }
.salida__area{ margin:0; font-weight:700; font-size:.78rem; letter-spacing:.14em;
  text-transform:uppercase; color:#8FB6F5; }
.salida__precio{ margin:.25rem 0 .3rem; font-family:var(--f-titulo); font-size:clamp(2.2rem,5.5vw,3.2rem);
  line-height:1; color:#fff; }
.salida__detalle{ margin:0; font-size:.92rem; color:rgba(255,255,255,.78); }
.calculadora__nota{ margin:.9rem 0 0; font-size:.83rem; color:rgba(255,255,255,.58); }
@media (max-width:900px){ .calculadora__inner{ grid-template-columns:1fr; } }

/* ---------- El taller ---------- */
.taller{ display:grid; grid-template-columns:1.1fr 1fr; gap:clamp(1.8rem,4vw,3.2rem); align-items:center; }
.taller__fotos{ display:grid; grid-template-columns:1fr 1fr; gap:.8rem; }
.taller__fotos figure{ margin:0; border-radius:var(--r); overflow:hidden; }
.taller__fotos img{ width:100%; height:100%; object-fit:cover; }
.taller__alta{ grid-row:span 2; }
@media (max-width:900px){ .taller{ grid-template-columns:1fr; } }

/* ---------- Preguntas ---------- */
.faq{ display:grid; gap:.5rem; }
.faq__item{ background:#fff; border:1px solid var(--linea); border-radius:var(--r); overflow:hidden; }
.faq__item summary{ position:relative; cursor:pointer; list-style:none; min-height:44px;
  padding:1rem 3rem 1rem 1.2rem; font-weight:600; color:var(--negro); }
.faq__item summary::-webkit-details-marker{ display:none; }
.faq__item summary::after{ content:""; position:absolute; right:1.3rem; top:50%; width:10px; height:10px;
  margin-top:-7px; border-right:2px solid var(--azul-os); border-bottom:2px solid var(--azul-os);
  transform:rotate(45deg); transition:transform .25s ease; }
.faq__item[open] summary::after{ transform:rotate(-135deg); margin-top:-2px; }
.faq__a{ padding:0 1.2rem 1.1rem; }
.faq__a p{ margin:0; }

/* ---------- Pie ---------- */
.pie{ background:var(--negro); color:rgba(255,255,255,.76); padding:2.2rem 0 2.6rem; }
.pie__inner{ display:flex; flex-wrap:wrap; gap:1rem 2rem; justify-content:space-between; }
.pie__marca{ margin:0 0 .2rem; font-family:var(--f-titulo); font-size:1.7rem; letter-spacing:.04em; color:#fff; }
.pie__datos{ display:grid; gap:.4rem; font-size:.92rem; }
.pie__datos li{ display:flex; align-items:center; gap:.5rem; }
.pie__datos .ico{ color:#8FB6F5; }