:root{--bg:#CBCED0;--ink:#15171A;--acc:#E2461F;--pane:#E3E5E6;--frame:#1B1C1E}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font:1.02rem/1.6 Manrope,system-ui,sans-serif}
h1,h2,h3,.logo,.facts b,.result strong,.mull span,.btn{font-family:'Big Shoulders Display','Arial Narrow',sans-serif;text-transform:uppercase}
h1{font-weight:900;font-size:clamp(3rem,8vw,6.6rem);line-height:.9;letter-spacing:-.005em}
h2{font-weight:800;font-size:clamp(2rem,4.5vw,3.4rem);line-height:.95;margin-bottom:1.4rem}
a{color:inherit}:focus-visible{outline:3px solid var(--acc);outline-offset:3px}
section{padding:4.5rem clamp(1.2rem,5vw,4.5rem)}
.top{display:flex;justify-content:space-between;align-items:center;padding:1rem clamp(1.2rem,5vw,4.5rem);border-bottom:3px solid var(--ink);position:sticky;top:0;background:var(--bg);z-index:5}
.logo{font-weight:900;font-size:1.7rem;text-decoration:none;letter-spacing:.04em}
.logo b{background:var(--ink);color:var(--bg);padding:0 .25em;margin-right:.05em}
.logo em{font:600 .7rem Manrope;letter-spacing:.2em;margin-left:.5rem;vertical-align:middle}
nav{display:flex;gap:1.5rem;align-items:center;font-weight:700;font-size:.9rem}
nav a{text-decoration:none}nav a:hover{color:var(--acc)}
.cta-nav{border:2px solid var(--ink);padding:.4rem 1rem}
.btn{display:inline-block;background:var(--acc);color:#fff;border:0;font-weight:800;font-size:1.15rem;letter-spacing:.06em;padding:.8rem 1.8rem;cursor:pointer;text-decoration:none;transition:background .2s}
.btn:hover{background:var(--ink)}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center;min-height:86vh}
.tag{font-weight:700;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--acc);margin-bottom:1rem}
.sub{max-width:48ch;margin:1.3rem 0 1.8rem;font-size:1.1rem}
/* ventana */
.win{position:relative;aspect-ratio:4/5;max-width:420px;margin:auto;border:18px solid var(--frame);background:var(--frame);overflow:hidden;box-shadow:12px 12px 0 var(--ink);transition:border-color .4s}
.scene{position:absolute;inset:0;background:linear-gradient(#7CC4F5,#D9EFFC 60%,#9CCB7B 60%,#6FA356);transition:background .8s}
.sun{position:absolute;top:14%;right:18%;width:56px;height:56px;border-radius:50%;background:#FFD54A;box-shadow:0 0 40px #FFD54A;transition:all .8s}
.win.night .scene{background:linear-gradient(#0B1330,#27345F 60%,#1B2A2A 60%,#121E1E)}
.win.night .sun{background:#EDEFF5;box-shadow:0 0 30px #8FA0D8,inset -14px 0 0 #B5BCD6}
.sash{position:absolute;top:0;bottom:0;width:52%;border:10px solid var(--frame);background:linear-gradient(115deg,#ffffff55 0 22%,#ffffff12 22% 30%,#ffffff33 30% 100%);backdrop-filter:blur(1px);transition:transform .9s cubic-bezier(.6,0,.2,1),border-color .4s}
.sash.a{left:0}.sash.b{right:0}
.win.open .sash.b{transform:translateX(-92%)}
.ctrl{display:flex;gap:.6rem;justify-content:center;margin-top:2rem;flex-wrap:wrap;align-items:center}
.chips{display:flex;gap:.5rem;margin-right:.8rem}
.chip{width:30px;height:30px;border-radius:50%;border:3px solid var(--bg);outline:2px solid var(--ink);cursor:pointer;background:var(--c)}
.chip[aria-checked=true]{outline:3px solid var(--acc);transform:scale(1.15)}
.mini{background:transparent;border:2px solid var(--ink);font:700 .85rem Manrope;padding:.4rem 1rem;cursor:pointer}
.mini:hover{background:var(--ink);color:var(--bg)}
/* facts */
.facts{display:grid;grid-template-columns:repeat(4,1fr);background:var(--ink);color:var(--bg);padding-block:2rem;gap:1rem}
.facts b{display:block;font-size:2.6rem;line-height:1;color:var(--acc);font-weight:900}
/* líneas: parteluz */
.mull{display:grid;grid-template-columns:repeat(4,1fr);border:3px solid var(--ink)}
.mull article{padding:1.6rem;border-right:3px solid var(--ink);background:var(--pane);transition:background .25s}
.mull article:last-child{border:0}.mull article:hover{background:var(--acc);color:#fff}
.mull span{font-size:3rem;font-weight:900;line-height:1;opacity:.35}
.mull h3{font-size:1.7rem;font-weight:800;margin:.6rem 0 .4rem}
/* cotizador */
.quote{display:grid;grid-template-columns:1.2fr .8fr;gap:3rem;background:var(--pane);border-block:3px solid var(--ink)}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
label{display:grid;gap:.3rem;font-weight:700;font-size:.9rem}
input,select,textarea{font:inherit;padding:.7rem;border:3px solid var(--ink);background:#fff;color:var(--ink);border-radius:0;width:100%}
.result{background:var(--ink);color:#fff;padding:2rem;display:flex;flex-direction:column;gap:.4rem;justify-content:center}
.result strong{font-size:clamp(2.6rem,6vw,4rem);font-weight:900;color:var(--acc);line-height:1}
.result .btn{margin-top:1rem}
/* proceso */
.steps ol{list-style:none;padding:0;display:grid;grid-template-columns:repeat(4,1fr);counter-reset:s;gap:1.5rem;position:relative}
.steps li{counter-increment:s;border-top:6px solid var(--ink);padding-top:1rem}
.steps li::before{content:"0" counter(s);font:900 2.4rem 'Big Shoulders Display';color:var(--acc);display:block}
.steps b{display:block;font:800 1.4rem 'Big Shoulders Display';text-transform:uppercase}
/* contacto */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:3rem;background:var(--pane);border-top:3px solid var(--ink)}
.contact ul{list-style:none;padding:0;display:grid;gap:1rem}.contact li b{display:block;font:800 1.1rem 'Big Shoulders Display';text-transform:uppercase;color:var(--acc)}
.contact form{display:grid;gap:1rem}.st{min-height:1.4rem;font-weight:700}.st.err{color:#B3261E}
footer{display:flex;justify-content:space-between;background:var(--ink);color:var(--bg);padding:1.3rem clamp(1.2rem,5vw,4.5rem);font-size:.9rem;flex-wrap:wrap;gap:.5rem}
footer i{font-style:normal}
@media(max-width:860px){
 .hero,.quote,.contact{grid-template-columns:1fr}.hero{min-height:auto}
 .facts,.steps ol{grid-template-columns:1fr 1fr}.mull{grid-template-columns:1fr 1fr}
 .mull article:nth-child(2){border-right:0}.mull article:nth-child(-n+2){border-bottom:3px solid var(--ink)}
 nav a:not(.cta-nav){display:none}.logo em{display:none}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}html{scroll-behavior:auto}}