:root{
  --bg:#e8ece1; --bg2:#dde3d3; --ink:#1c2a21; --soft:#4b5c50; --thread:#3f7a62; --spore:#b88a3e; --card:#f3f5ee; --line:#c4cdb8;
  --hf:'Bricolage Grotesque','Helvetica Neue',Arial,sans-serif; --bf:'Source Serif 4',Georgia,'Times New Roman',serif;
  box-sizing:border-box; padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#121b16;--bg2:#18241d;--ink:#e6ebdf;--soft:#a3b3a6;--thread:#6fb99a;--spore:#d1a258;--card:#1a271f;--line:#2b3b31}}
:root[data-theme="dark"]{--bg:#121b16;--bg2:#18241d;--ink:#e6ebdf;--soft:#a3b3a6;--thread:#6fb99a;--spore:#d1a258;--card:#1a271f;--line:#2b3b31}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.125rem/1.65 var(--bf)}
h1,h2,h3{font-family:var(--hf);line-height:1.08;letter-spacing:-.02em;margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--spore);outline-offset:3px}
.wrap{max-width:1040px;margin:0 auto;padding:0 1.5rem}
section{padding:5.5rem 0}
p{max-width:62ch;margin:0 0 1rem}
.mark{display:inline-flex;align-items:center;padding:1.4rem 0 0;font:700 1.25rem var(--hf);color:var(--ink);text-decoration:none}
.logo{display:block;height:3rem;width:auto;max-width:60vw}
.flogo{display:block;height:2rem;width:auto;margin-bottom:.8rem}

/* ─── NAV ─── */
        nav{
          position:fixed;top:0;left:0;right:0;z-index:100;
          display:flex;align-items:center;justify-content:space-between;
          padding:calc(env(safe-area-inset-top,0px) + 1rem) 2rem 1rem;
          transition:background .4s,border-color .4s;
          border-bottom:1px solid transparent;
        }
        nav.scrolled{background:rgba(245,240,232,.92);border-color:var(--border);backdrop-filter:blur(16px)}

        /* LOGO en nav */
        .nav-logo{display:flex;align-items:center;gap:.75rem;text-decoration:none}
        .nav-logo-mark{width:32px;height:32px;flex-shrink:0}
        .nav-logo-text{display:flex;flex-direction:column;line-height:1.1}
        .nav-logo-name{font-family:'Playfair Display',serif;font-style:italic;font-size:1.1rem;color:var(--text);letter-spacing:.01em}
        .nav-logo-sub{font-family:'DM Mono',monospace;font-size:.58rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}

        /* selector de idioma */
        .lang-switcher{display:flex;align-items:center;gap:.5rem;margin-right:1.2rem}
        .lang-switcher a{font-family:'DM Mono',monospace;font-size:.65rem;letter-spacing:.12em;color:var(--muted);text-decoration:none;padding:.2rem .4rem;border:1px solid transparent;transition:color .2s,border-color .2s}
        .lang-switcher a:hover{color:var(--warm);border-color:var(--border-warm)}
        .lang-switcher a.active{color:var(--accent);border-color:var(--accent-dim)}
        .nav-right{display:flex;align-items:center}

        .nav-cta{font-family:'DM Sans',sans-serif;font-size:.8rem;font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--bg);background:var(--accent);border:none;padding:.6rem 1.4rem;cursor:pointer;text-decoration:none;transition:opacity .2s}
        .nav-cta:hover{opacity:.82}

/* hero */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;overflow:hidden;padding:3rem 0 5rem}
.hero svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero .wrap{position:relative}
.hero h1{font-size:clamp(2.4rem,6.4vw,4.9rem);font-weight:700;max-width:15ch}
.hero p.lead{font-size:1.3rem;color:var(--soft);margin-top:1.6rem;max-width:44ch}
.btn{display:inline-block;margin-top:1.6rem;padding:.95rem 1.7rem;border-radius:999px;background:var(--ink);color:var(--bg);font:600 1rem var(--hf);text-decoration:none;transition:background .2s}
.btn:hover{background:var(--thread)}
.btn.alt{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.alt:hover{background:var(--ink);color:var(--bg)}

/* problem */
.problem{background:var(--bg2)}
.problem h2,.pieces h2,.how h2,.why h2{font-size:clamp(1.9rem,4vw,3rem);max-width:20ch;margin-bottom:1.6rem}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}
.pain{list-style:none;margin:0;padding:0}
.pain li{padding:1rem 0;border-top:1px solid var(--line);color:var(--soft)}
.pain li b{display:block;color:var(--ink);font:600 1.1rem var(--hf)}

/* pieces */
.pieces .intro{max-width:56ch;color:var(--soft)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.1rem;margin-top:2.4rem}
.piece{background:var(--card);border:1px solid var(--line);border-radius:22px 6px 22px 6px;padding:1.5rem}
.piece:nth-child(3n+2){border-radius:6px 22px 6px 22px}
.piece h3{font-size:1.25rem;margin-bottom:.5rem}
.piece p{font-size:1rem;color:var(--soft);margin:0}
.piece.wide{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;background:var(--ink);color:var(--bg);border-color:var(--ink);border-radius:22px}
.piece.wide p{color:inherit;opacity:.85}

/* how */
.how{background:var(--bg2)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:2.2rem;counter-reset:s}
.steps div{counter-increment:s;border-top:2px solid var(--thread);padding-top:1rem}
.steps h3{font-size:1.2rem;margin-bottom:.4rem}
.steps h3::before{content:counter(s) ". ";color:var(--thread)}
.steps p{color:var(--soft);font-size:1rem}

/* why */
.why ul{margin:0;padding:0;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:1.4rem 3rem}
.why li{padding-left:1.4rem;position:relative;color:var(--soft)}
.why li::before{content:"";position:absolute;left:0;top:.7em;width:.6rem;height:.6rem;border-radius:50%;background:var(--spore)}
.why li b{color:var(--ink);font-family:var(--hf)}

/* cta */
.cta{background:var(--ink);color:var(--bg);text-align:center}
.cta h2{font-size:clamp(1.9rem,4.4vw,3.2rem);margin:0 auto 1.2rem;max-width:18ch}
.cta p{margin:0 auto 1rem;opacity:.85}
.cta .btn{background:var(--bg);color:var(--ink)}
.cta .btn:hover{background:var(--spore);color:#1c2a21}
.mid{text-align:left;padding:3.2rem 0;border-block:1px solid var(--line)}
.mid .wrap{display:flex;gap:1.5rem;align-items:center;justify-content:space-between;flex-wrap:wrap}
.mid p{margin:0;font:600 1.4rem/1.25 var(--hf);max-width:26ch}
.mid .btn{margin:0}
footer{padding:2rem 0 2.5rem;color:var(--soft);font-size:.95rem}

@media (max-width:760px){
  section{padding:3.8rem 0}
  .cols,.steps,.why ul,.piece.wide{grid-template-columns:1fr}
  .hero{min-height:80vh}
  .nav-cta{display:none;}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}