/* =========================================================
   FireKnowHow — Identidad visual del sitio
   Paleta y tipografía heredadas de los comprobantes FKH
   ========================================================= */
:root{
  --ink:#1C1F23;        /* charcoal — texto / fondos oscuros */
  --ink-2:#3A3F46;      /* texto secundario */
  --ink-3:#6B7079;      /* metadatos / muted */
  --red:#B62A1F;        /* rojo fuego — acento de marca */
  --red-700:#8f2017;    /* rojo hover */
  --paper:#E8E6E1;      /* fondo de página */
  --paper-2:#f2f0ec;    /* tarjetas claras */
  --white:#FFFFFF;
  --rule:#1C1F23;
  --rule-soft:rgba(28,31,35,.22);
  --rule-faint:rgba(28,31,35,.12);
  --rule-light:rgba(255,255,255,.16);
  --maxw:1180px;
  --gutter:clamp(20px,5vw,64px);
  --radius:8px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Space Grotesk',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
:focus-visible{outline:2.5px solid var(--red);outline-offset:3px;border-radius:3px;}

/* ---------- Tipografía utilitaria ---------- */
.mono{font-family:'IBM Plex Mono',monospace;}
.tag{
  font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-3);font-weight:600;
}
.tag--red{color:var(--red);}
h1,h2,h3,h4{font-weight:700;letter-spacing:-0.02em;line-height:1.08;margin:0 0 .5em;}
h1{font-size:clamp(2.4rem,6vw,4.4rem);}
h2{font-size:clamp(1.8rem,4vw,2.9rem);}
h3{font-size:1.3rem;letter-spacing:-0.01em;}
p{margin:0 0 1rem;color:var(--ink-2);}
.lead{font-size:clamp(1.05rem,2vw,1.3rem);color:var(--ink-2);max-width:62ch;}
.fire{color:var(--red);}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter);}
.section{padding-block:clamp(56px,9vw,120px);}
.section--tight{padding-block:clamp(40px,6vw,72px);}
.eyebrow{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red);}

/* ---------- Botones ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:600;font-size:.95rem;
  padding:13px 26px;border-radius:var(--radius);
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .15s ease,background .15s ease,color .15s ease,border-color .15s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn--primary{background:var(--red);color:#fff;}
.btn--primary:hover{background:var(--red-700);}
.btn--ghost{background:transparent;border-color:var(--rule-soft);color:var(--ink);}
.btn--ghost:hover{border-color:var(--ink);}
.btn--light{background:#fff;color:var(--ink);}
.btn--on-dark{border-color:var(--rule-light);color:#fff;}
.btn--on-dark:hover{border-color:#fff;background:rgba(255,255,255,.06);}
.btn .arrow{transition:transform .15s ease;}
.btn:hover .arrow{transform:translateX(3px);}

/* =========================================================
   Header / navegación
   ========================================================= */
.site-header{position:sticky;top:0;z-index:50;background:var(--ink);color:#fff;}
.site-header::after{content:"";display:block;height:3px;background:var(--red);}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;
  max-width:var(--maxw);margin-inline:auto;padding:14px var(--gutter);}
.brand{display:flex;align-items:center;gap:12px;}
.brand svg{width:38px;height:38px;flex:none;}
.brand .wordmark{font-weight:700;font-size:1.25rem;letter-spacing:-0.02em;line-height:1;color:#fff;}
.brand .wordmark .fire{color:var(--red);}
.brand .sub{font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.16em;
  text-transform:uppercase;color:#9aa0a8;margin-top:3px;}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;}
.nav-links a{
  font-size:.92rem;font-weight:500;color:#d6d8db;padding:9px 14px;border-radius:6px;
  transition:color .15s,background .15s;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.07);}
.nav-links a[aria-current="page"]{color:#fff;}
.nav-links a[aria-current="page"]::after{
  content:"";display:block;height:2px;background:var(--red);margin-top:4px;border-radius:2px;
}
.nav-cta{display:flex;align-items:center;gap:10px;}
.nav-toggle{display:none;background:none;border:1.5px solid var(--rule-light);border-radius:6px;
  width:42px;height:42px;color:#fff;cursor:pointer;align-items:center;justify-content:center;}
.nav-toggle svg{width:22px;height:22px;}

@media(max-width:920px){
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:0;background:var(--ink);border-top:1px solid var(--rule-light);
    padding:8px var(--gutter) 18px;display:none;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:13px 6px;border-bottom:1px solid var(--rule-light);}
  .nav-links a[aria-current="page"]::after{display:none;}
  .nav .nav-cta .btn{display:none;}
}

/* =========================================================
   Hero
   ========================================================= */
.hero{position:relative;overflow:hidden;background:var(--ink);color:#fff;}
.hero .wrap{position:relative;z-index:2;padding-block:clamp(64px,11vw,128px);}
.hero h1{color:#fff;max-width:16ch;}
.hero .lead{color:#c7cace;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 28px;margin:30px 0 36px;}
.hero-meta .item{display:flex;align-items:center;gap:9px;font-family:'IBM Plex Mono',monospace;
  font-size:13px;letter-spacing:.04em;color:#aeb2b8;}
.hero-meta .item b{color:#fff;font-weight:600;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-glow{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(60% 80% at 88% 8%,rgba(182,42,31,.34),transparent 60%),
    radial-gradient(40% 60% at 12% 100%,rgba(182,42,31,.16),transparent 60%);}
.hero-grid{position:absolute;inset:0;z-index:1;opacity:.5;pointer-events:none;
  background-image:linear-gradient(var(--rule-light) 1px,transparent 1px),
    linear-gradient(90deg,var(--rule-light) 1px,transparent 1px);
  background-size:64px 64px;mask-image:linear-gradient(to bottom,#000,transparent 75%);}

/* Tira de normas / credenciales */
.strip{border-top:1px solid var(--rule-light);border-bottom:1px solid var(--rule-light);
  background:rgba(0,0,0,.18);}
.strip .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:14px 34px;padding-block:18px;}
.strip .label{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:#7f858d;}
.strip .norms{display:flex;flex-wrap:wrap;gap:12px 22px;}
.strip .norms span{font-family:'IBM Plex Mono',monospace;font-size:13px;letter-spacing:.06em;color:#d6d8db;}

/* =========================================================
   Tarjetas de servicio
   ========================================================= */
.grid{display:grid;gap:20px;}
.grid--3{grid-template-columns:repeat(3,1fr);}
.grid--2{grid-template-columns:repeat(2,1fr);}
.grid--4{grid-template-columns:repeat(4,1fr);}
@media(max-width:900px){.grid--3,.grid--4{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.grid--2,.grid--3,.grid--4{grid-template-columns:1fr;}}

.card{
  background:var(--white);border:1px solid var(--rule-faint);border-radius:var(--radius);
  padding:28px;position:relative;transition:border-color .15s,transform .15s,box-shadow .15s;
}
.card:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:0 12px 32px rgba(28,31,35,.10);}
.card .num{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.1em;color:var(--red);}
.card .ico{width:42px;height:42px;margin-bottom:18px;color:var(--red);}
.card h3{margin-bottom:.4em;}
.card p{font-size:.96rem;margin:0;}
.card ul{margin:14px 0 0;padding:0;list-style:none;}
.card ul li{font-size:.9rem;color:var(--ink-2);padding:6px 0 6px 20px;position:relative;
  border-top:1px solid var(--rule-faint);}
.card ul li::before{content:"";position:absolute;left:2px;top:12px;width:7px;height:7px;
  background:var(--ink);}

/* Bloque rule (estilo comprobante) */
.feature-row{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center;}
@media(max-width:840px){.feature-row{grid-template-columns:1fr;}}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule-soft);
  border:1px solid var(--rule-soft);border-radius:var(--radius);overflow:hidden;}
.stat-grid .stat{background:var(--paper);padding:26px 22px;}
.stat-grid .stat .n{font-size:2.4rem;font-weight:700;letter-spacing:-0.02em;}
.stat-grid .stat .l{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink-3);margin-top:4px;}

/* Lista normativa con check mono */
.checklist{list-style:none;margin:0;padding:0;}
.checklist li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--rule-faint);}
.checklist li .k{font-family:'IBM Plex Mono',monospace;color:var(--red);font-size:.95rem;
  font-weight:600;flex:none;width:64px;}
.checklist li .t strong{display:block;}
.checklist li .t span{color:var(--ink-3);font-size:.92rem;}

/* =========================================================
   Sección oscura (CTA / nosotros)
   ========================================================= */
.dark{background:var(--ink);color:#fff;}
.dark h2,.dark h3{color:#fff;}
.dark p{color:#c2c5c9;}
.dark .tag{color:#8b9098;}
.dark .card{background:#23272c;border-color:var(--rule-light);}
.dark .card:hover{border-color:#fff;box-shadow:none;}

.cta-band{position:relative;overflow:hidden;}
.cta-band::before{content:"";position:absolute;inset:0;
  background:radial-gradient(50% 120% at 85% 0,rgba(182,42,31,.30),transparent 60%);}
.cta-band .wrap{position:relative;display:flex;flex-wrap:wrap;align-items:center;
  justify-content:space-between;gap:28px;}
.cta-band h2{max-width:18ch;}

/* =========================================================
   Proyectos
   ========================================================= */
.project{background:var(--white);border:1px solid var(--rule-faint);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s,border-color .15s;}
.project:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(28,31,35,.10);border-color:var(--ink);}
.project .thumb{aspect-ratio:16/10;background:var(--ink);position:relative;overflow:hidden;
  display:flex;align-items:flex-end;padding:18px;}
.project .thumb .glow{position:absolute;inset:0;
  background:radial-gradient(70% 90% at 70% 10%,rgba(182,42,31,.4),transparent 60%);}
.project .thumb .cat{position:relative;font-family:'IBM Plex Mono',monospace;font-size:11px;
  letter-spacing:.14em;text-transform:uppercase;color:#fff;
  border:1px solid var(--rule-light);padding:5px 10px;border-radius:5px;background:rgba(0,0,0,.25);}
.project .body{padding:22px;}
.project .body h3{font-size:1.12rem;}
.project .body .meta{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--ink-3);
  letter-spacing:.04em;margin-top:10px;}

/* =========================================================
   Contacto / formulario
   ========================================================= */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(28px,5vw,64px);}
@media(max-width:840px){.contact-grid{grid-template-columns:1fr;}}
.info-block{border-top:1.5px solid var(--ink);padding-top:18px;margin-bottom:26px;}
.info-block .tag{display:block;margin-bottom:8px;}
.info-block a,.info-block .v{font-size:1.15rem;font-weight:600;font-family:'IBM Plex Mono',monospace;
  letter-spacing:-0.01em;}
.info-block a:hover{color:var(--red);}

form.fkh{display:grid;gap:18px;background:var(--white);border:1px solid var(--rule-faint);
  border-radius:var(--radius);padding:clamp(22px,4vw,38px);}
.field{display:flex;flex-direction:column;gap:7px;}
.field label{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink-3);font-weight:600;}
.field input,.field textarea,.field select{
  font:inherit;font-size:.98rem;color:var(--ink);background:var(--paper-2);
  border:1.5px solid var(--rule-faint);border-radius:6px;padding:13px 14px;width:100%;
  transition:border-color .15s,background .15s;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--red);background:#fff;}
.field textarea{resize:vertical;min-height:130px;}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
@media(max-width:520px){.field-row{grid-template-columns:1fr;}}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;}
.form-note{font-size:.82rem;color:var(--ink-3);}
.form-status{font-family:'IBM Plex Mono',monospace;font-size:.85rem;display:none;padding:12px 14px;border-radius:6px;}
.form-status.show{display:block;}
.form-status.ok{background:rgba(28,31,35,.06);color:var(--ink);border:1px solid var(--rule-faint);}
.form-status.err{background:rgba(182,42,31,.08);color:var(--red);border:1px solid rgba(182,42,31,.3);}

/* =========================================================
   Footer
   ========================================================= */
.site-footer{background:var(--ink);color:#fff;padding-block:clamp(48px,7vw,80px) 0;}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
@media(max-width:820px){.site-footer .cols{grid-template-columns:1fr 1fr;}}
@media(max-width:480px){.site-footer .cols{grid-template-columns:1fr;}}
.site-footer .wordmark{font-weight:700;font-size:1.3rem;letter-spacing:-0.02em;color:#fff;}
.site-footer .wordmark .fire{color:var(--red);}
.site-footer p{color:#a4a9af;font-size:.92rem;max-width:34ch;}
.site-footer h4{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:#7f858d;font-weight:600;margin-bottom:14px;}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.site-footer ul a{color:#c2c5c9;font-size:.92rem;}
.site-footer ul a:hover{color:#fff;}
.site-footer .legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding:22px 0;border-top:1px solid var(--rule-light);
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.04em;color:#7f858d;}

/* ---------- Reveal on scroll ---------- */
@media(prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
  .reveal.in{opacity:1;transform:none;}
}