/* Grupo Arké PG · estilos del sitio
 * Identidad: minimalista, industrial, brutalista (referencia: concreto aparente de Tadao Ando).
 * Paleta: carbón #0A0A0A · púrpura gris #2F2B36 · dorado #BFA86D · concreto #7A7D7B
 */
:root{
  --ink:#0A0A0A;--plum:#2F2B36;--gold:#BFA86D;--gold-2:#D8C690;--concrete:#7A7D7B;
  --slab:#C6C6C1;--paper:#F3F3F1;--white:#FFFFFF;--line:#D3D3CF;--text-2:#474A48;
  --display:'Archivo',system-ui,sans-serif;--body:'Public Sans',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 var(--body);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--display);font-stretch:112%;margin:0;line-height:1.06;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0}
.wrap{max-width:1240px;margin:0 auto;padding:0 40px}
.sec{padding:112px 0}
.sec.tight{padding:80px 0}
.ink{background:var(--ink);color:#EDEDEA}
.plum{background:var(--plum);color:#EDEDEA}
.white{background:var(--white)}
.h1{font-size:clamp(40px,6vw,82px);font-weight:800}
.h2{font-size:clamp(30px,3.6vw,50px);font-weight:700}
.h3{font-size:22px;font-weight:700}
.lead{font-size:19px;line-height:1.6;max-width:62ch;color:var(--text-2)}
.ink .lead,.plum .lead{color:#B9BBB8}
.kicker{font-size:15px;color:var(--concrete);font-weight:500;margin-bottom:18px}
.ink .kicker,.plum .kicker{color:var(--gold)}
.small{font-size:14px;color:var(--concrete)}
.stack>*+*{margin-top:22px}
.head{max-width:760px;margin-bottom:56px}
.head .lead{margin-top:20px}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;z-index:100;background:var(--gold);color:var(--ink);padding:10px 14px}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* Botones */
.btn{display:inline-flex;align-items:center;min-height:52px;padding:0 26px;font:600 15px/1 var(--body);text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn-gold{background:var(--gold);color:var(--ink)}
.btn-gold:hover{background:var(--gold-2)}
.btn-line{border-color:currentColor;background:transparent;color:inherit}
.btn-line:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.ink .btn-line:hover,.plum .btn-line:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn[disabled]{opacity:.6;cursor:wait}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}

/* Encabezado */
.hdr{position:sticky;top:0;z-index:50;background:var(--ink);color:#EDEDEA;border-bottom:1px solid #1E1E1E}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand img{width:44px;height:44px}
.brand b{display:block;font:700 17px/1.1 var(--display);font-stretch:112%;letter-spacing:.02em}
.brand small{display:block;font:400 11.5px/1.3 var(--body);color:var(--concrete)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{text-decoration:none;font-size:14.5px;color:#C9CAC7}
.nav a:hover{color:#fff}
.nav a[aria-current=page]{color:#fff;box-shadow:inset 0 -2px 0 var(--gold);padding-bottom:4px}
.nav .btn{color:var(--ink);min-height:44px;padding:0 20px;box-shadow:none}
.menu-btn{display:none;background:none;border:1px solid #444;color:#fff;font:600 14px var(--body);padding:10px 14px;cursor:pointer}
@media (max-width:1100px){
  .menu-btn{display:block}
  .nav{position:absolute;left:0;right:0;top:76px;background:var(--ink);flex-direction:column;align-items:flex-start;padding:12px 40px 28px;gap:18px;display:none;border-bottom:1px solid #222}
  .nav.open{display:flex}
}

/* Hero: muro de concreto con un corte de luz */
.wall{position:relative;overflow:hidden;background-color:var(--slab);
  background-image:
    radial-gradient(circle,rgba(28,28,28,.55) 0 2.5px,rgba(255,255,255,.45) 3px,transparent 4px),
    linear-gradient(90deg,rgba(55,57,56,.22) 1px,transparent 1px),
    linear-gradient(0deg,rgba(55,57,56,.22) 1px,transparent 1px),
    radial-gradient(ellipse at 22% 18%,rgba(255,255,255,.38),transparent 55%),
    radial-gradient(ellipse at 78% 88%,rgba(0,0,0,.12),transparent 60%);
  background-size:120px 90px,360px 180px,360px 180px,100% 100%,100% 100%}
.slit{position:absolute;top:0;bottom:0;left:70%;width:7px;background:linear-gradient(180deg,#FFF9EA,#EADBAE 45%,var(--gold));box-shadow:0 0 28px 6px rgba(234,219,174,.55),0 0 110px 34px rgba(191,168,109,.22);transform-origin:top;animation:luz 1.6s cubic-bezier(.2,.7,.2,1) .25s both}
@keyframes luz{from{transform:scaleY(0)}to{transform:scaleY(1)}}
.hero{min-height:calc(100vh - 76px);display:flex;align-items:center;padding:96px 0}
.hero .copy{position:relative;z-index:1;max-width:min(760px,62vw)}
.hero .lead{color:#262827;margin-top:28px}
.hero .btn-line:hover{background:var(--ink);color:var(--paper)}
@media (max-width:860px){.slit{left:auto;right:16px;width:5px}.hero .copy{max-width:none;padding-right:20px}.hero{min-height:auto;padding:88px 0}}

/* Encabezado de página interior */
.phero{background:var(--ink);color:#EDEDEA;padding:104px 0 88px;position:relative}
.phero .wrap{border-left:3px solid var(--gold);padding-left:40px}
.phero .h1{font-size:clamp(36px,5vw,66px);max-width:20ch}
.phero .lead{margin-top:24px;color:#B9BBB8}
@media (max-width:560px){.phero .wrap{padding-left:20px;margin-left:22px;margin-right:0;padding-right:22px}}

/* Filas */
.split{display:grid;grid-template-columns:5fr 7fr;gap:72px;align-items:start}
@media (max-width:960px){.split{grid-template-columns:1fr;gap:40px}}
.rows{border-top:1px solid var(--line)}
.rows>div{display:grid;grid-template-columns:minmax(180px,1fr) 2fr;gap:24px;padding:26px 0;border-bottom:1px solid var(--line)}
.rows h3{font-size:21px}
.rows p{color:var(--text-2)}
.ink .rows,.ink .rows>div,.plum .rows,.plum .rows>div{border-color:#2E2E2E}
.ink .rows p,.plum .rows p{color:#B9BBB8}
@media (max-width:760px){.rows>div{grid-template-columns:1fr;gap:8px}}

/* Ciclo del negocio */
.cycle{border-top:1px solid #2A2A2A}
.cycle>div{display:grid;grid-template-columns:220px 1fr 220px;gap:28px;padding:30px 0;border-bottom:1px solid #2A2A2A;align-items:baseline}
.cycle b{font:700 30px/1 var(--display);font-stretch:112%;color:#fff}
.cycle p{color:#B9BBB8}
.cycle .who{color:var(--gold);font-weight:600;text-align:right}
.cycle .who a{text-decoration:none}.cycle .who a:hover{text-decoration:underline}
@media (max-width:860px){.cycle>div{grid-template-columns:1fr;gap:8px}.cycle .who{text-align:left}}

/* Marcas */
.brands{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:#423D4A}
.slab{background:var(--plum);padding:40px 32px 36px;border-top:4px solid var(--accent,var(--gold));display:flex;flex-direction:column;gap:16px}
.slab h3{font-size:28px;color:#fff}
.slab .what{color:var(--gold);font-weight:600;font-size:14.5px}
.slab p{color:#CAC8CF}
.slab .btn{margin-top:auto;align-self:flex-start}
@media (max-width:900px){.brands{grid-template-columns:1fr}}

/* Datos y pasos */
.facts{display:grid;grid-template-columns:repeat(3,1fr);border-top:2px solid var(--ink);margin-top:48px}
.facts div{padding:28px 28px 0 0}
.facts b{display:block;font:800 28px/1.1 var(--display);font-stretch:112%;margin-bottom:10px}
.facts span{color:var(--text-2);font-size:15px}
@media (max-width:760px){.facts{grid-template-columns:1fr}.facts div{padding:22px 0 0}}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(5,1fr);padding:0;border-top:1px solid var(--line)}
.steps li{list-style:none;counter-increment:s;padding:30px 24px 0 0}
.steps li::before{content:counter(s);display:block;font:800 46px/1 var(--display);font-stretch:112%;color:var(--gold);margin-bottom:18px}
.steps b{display:block;font-size:17px;margin-bottom:6px}
.steps span{color:var(--text-2);font-size:15px}
@media (max-width:960px){.steps{grid-template-columns:1fr 1fr;gap:8px}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

/* Divisiones */
.division{display:grid;grid-template-columns:5fr 7fr;gap:72px;padding:72px 0;border-top:1px solid var(--line);scroll-margin-top:96px}
.division:first-child{border-top:0;padding-top:0}
.division .tag{color:var(--concrete);font-size:14.5px;font-weight:600;margin-bottom:12px}
.division h2{font-size:clamp(28px,3vw,40px);font-weight:700}
.division p{color:var(--text-2);font-size:17.5px;max-width:62ch}
.tags{padding:0;margin-top:24px;display:flex;flex-wrap:wrap;gap:8px}
.tags li{list-style:none;border:1px solid #B9BAB6;padding:7px 12px;font-size:14px;background:var(--white)}
@media (max-width:960px){.division{grid-template-columns:1fr;gap:20px}}

/* Proyectos */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case{background:var(--white);border:1px solid var(--line);padding:32px 28px}
.case h3{font-size:22px;margin-bottom:16px}
.case ul{padding-left:18px;color:var(--text-2)}
.case li+li{margin-top:8px}
@media (max-width:960px){.cases{grid-template-columns:1fr}}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:22px 0}
.faq summary{cursor:pointer;font:700 19px/1.3 var(--display);font-stretch:108%;list-style:none;display:flex;justify-content:space-between;gap:24px}
.faq summary::after{content:'+';color:var(--gold);font-size:26px;line-height:1}
.faq details[open] summary::after{content:'−'}
.faq details p{margin-top:12px;color:var(--text-2);max-width:70ch}

/* Formulario */
.contact{display:grid;grid-template-columns:7fr 4fr;gap:64px;align-items:start}
@media (max-width:960px){.contact{grid-template-columns:1fr}}
.form{display:grid;grid-template-columns:1fr 1fr;gap:22px 24px}
.form .full{grid-column:1/-1}
.field label{display:block;font-weight:600;font-size:14.5px;margin-bottom:8px}
.field .opt{font-weight:400;color:var(--concrete)}
.field input,.field select,.field textarea{width:100%;font:16px var(--body);padding:14px;border:1.5px solid #B4B5B1;background:var(--white);color:var(--ink);border-radius:0;appearance:none}
.field select{background-image:linear-gradient(45deg,transparent 50%,var(--ink) 50%),linear-gradient(135deg,var(--ink) 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;background-size:6px 6px;background-repeat:no-repeat;padding-right:40px}
.field textarea{min-height:150px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 3px rgba(191,168,109,.5)}
.check{display:flex;gap:12px;align-items:flex-start;font-size:14.5px}
.check input{width:20px;height:20px;margin-top:2px;accent-color:var(--ink);flex:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.status{padding:16px 18px;border-left:4px solid var(--gold);background:var(--white);font-size:15px}
.status.err{border-left-color:#B4423F}
.aside{background:var(--ink);color:#D5D6D3;padding:36px 32px}
.aside h2{font-size:22px;color:#fff;margin-bottom:22px}
.aside dt{color:var(--gold);font-size:13.5px;font-weight:600;margin-top:18px}
.aside dd{margin:4px 0 0}
.aside a{color:#fff}
@media (max-width:760px){.form{grid-template-columns:1fr}}

/* Legal */
.legal{max-width:78ch}
.legal h2{font-size:22px;margin:44px 0 12px}
.legal p,.legal li{color:#2A2C2B}
.legal p+p{margin-top:12px}
.legal ol,.legal ul{padding-left:22px;margin-top:10px}
.legal li+li{margin-top:6px}
.note{margin-top:40px;padding:20px 22px;border-left:3px solid var(--gold);background:var(--white);font-size:14.5px;color:var(--text-2)}

/* Pie */
.ftr{background:var(--ink);color:#B9BBB8;padding:80px 0 32px;font-size:14.5px}
.fcols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.ftr h4{font:600 14.5px var(--body);color:#fff;margin-bottom:16px}
.ftr a{display:block;text-decoration:none;color:#B9BBB8;margin-bottom:10px}
.ftr a:hover{color:#fff}
.ftr p{margin-bottom:10px}
.fbottom{margin-top:56px;padding-top:24px;border-top:1px solid #262626;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:var(--concrete)}
@media (max-width:900px){.fcols{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.fcols{grid-template-columns:1fr}}
.wa{position:fixed;right:20px;bottom:20px;z-index:60;background:var(--ink);color:#fff;border:1.5px solid var(--gold);padding:14px 18px;font:600 14px var(--body);text-decoration:none}
.wa:hover{background:var(--gold);color:var(--ink)}
@media (max-width:560px){.wrap{padding:0 22px}.sec{padding:80px 0}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.slit{animation:none}}
/* Banner de cookies */
.cookie{position:fixed;left:20px;right:20px;bottom:20px;z-index:70;max-width:720px;margin:0 auto;background:var(--ink);color:#D5D6D3;border:1.5px solid var(--gold);padding:22px 24px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;font-size:14.5px}
.cookie p{flex:1 1 320px}
.cookie a{color:#fff}
.cookie .btn{min-height:44px;padding:0 20px}
.linkbtn{background:none;border:0;padding:0;color:#B9BBB8;font:inherit;cursor:pointer;text-align:left;margin-bottom:10px}
.linkbtn:hover{color:#fff}
/* Redes sociales del pie */
.social{display:flex;gap:10px;margin-top:14px}
.social-ico{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid rgba(255,255,255,.25);color:inherit;transition:border-color .2s,color .2s}
.social-ico svg{width:16px;height:16px;fill:currentColor}
.social-ico:hover{border-color:var(--gold);color:var(--gold)}