/* Fuentes alojadas en la propia web (licencia SIL OFL) */
@font-face{font-family:"Bricolage Grotesque Web";src:url(fonts/bricolage-grotesque.woff2) format("woff2");font-weight:200 800;font-display:swap}
@font-face{font-family:"Source Serif 4 Web";src:url(fonts/source-serif-4.woff2) format("woff2");font-weight:200 900;font-display:swap}
@font-face{font-family:"JetBrains Mono Web";src:url(fonts/jetbrains-mono.woff2) format("woff2");font-weight:100 800;font-display:swap}
html{scroll-behavior:smooth}
body{margin:0}
img{max-width:100%}

/* Layout: cuaderno de laboratorio — columna editorial con fichas técnicas de proyecto, etiqueta de precio "0,00 €" como sello recurrente */
:root{
  --bg:#f5f6f2; --surface:#ffffff; --ink:#14212b; --muted:#566570; --line:#d9ded8;
  --accent:#1f5f8b; --tag:#f2c230; --tag-ink:#2a2100;
  --display:"Bricolage Grotesque Web", "Avenir Next", system-ui, sans-serif;
  --body:"Source Serif 4 Web", Georgia, "Times New Roman", serif;
  --mono:"JetBrains Mono Web", ui-monospace, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0f171d; --surface:#16222b; --ink:#e7ecef; --muted:#9aa9b3; --line:#2a3842;
  --accent:#7fb7e0; --tag:#e9b824; --tag-ink:#231b00; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f171d; --surface:#16222b; --ink:#e7ecef; --muted:#9aa9b3; --line:#2a3842;
  --accent:#7fb7e0; --tag:#e9b824; --tag-ink:#231b00; color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.6}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px, env(safe-area-inset-left, 0px));padding-right:max(16px, env(safe-area-inset-right, 0px))}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--tag);outline-offset:2px}
h1,h2,h3{font-family:var(--display);text-wrap:balance;line-height:1.1;margin:0}
.label{font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}

/* Cabecera */
header.top{border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-block:18px}
.logo{font-family:var(--display);font-weight:800;font-size:1.15rem;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:10px}
.logo b{font-family:var(--mono);font-size:.7rem;background:var(--tag);color:var(--tag-ink);padding:3px 7px;border-radius:3px}
nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0;flex-wrap:wrap;font-family:var(--display);font-weight:500;font-size:.95rem}
nav a{color:var(--ink);text-decoration:none}
nav a:hover{color:var(--accent)}

/* Portada */
.hero .wrap{display:grid;grid-template-columns:1.6fr 1fr;gap:48px;align-items:center;padding-block:64px 56px}
.hero h1{font-size:clamp(2.3rem,5.6vw,4.2rem);font-weight:800;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{max-width:34em;color:var(--muted);font-size:1.15rem;margin:22px 0 28px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{font-family:var(--display);font-weight:700;text-decoration:none;padding:12px 20px;border-radius:6px;border:2px solid var(--ink);color:var(--ink)}
.btn.primary{background:var(--ink);color:var(--bg)}
.btn:hover{transform:translateY(-1px)}
.price{justify-self:center;position:relative;background:var(--tag);color:var(--tag-ink);padding:34px 40px 30px 56px;border-radius:6px 22px 22px 6px;transform:rotate(-4deg);box-shadow:0 18px 40px -20px rgba(0,0,0,.45)}
.price::before{content:"";position:absolute;left:20px;top:50%;width:16px;height:16px;margin-top:-8px;border-radius:50%;background:var(--bg)}
.price .label{color:var(--tag-ink);opacity:.75}
.price strong{display:block;font-family:var(--display);font-size:clamp(3rem,7vw,4.6rem);font-weight:800;line-height:1;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.price small{font-family:var(--mono);font-size:.75rem}

/* Secciones */
section.block .wrap{padding-block:56px}
section.block + section.block .wrap{border-top:1px solid var(--line)}
.head{display:flex;justify-content:space-between;align-items:end;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.head h2{font-size:clamp(1.7rem,3.4vw,2.4rem);font-weight:700}
.head p{margin:6px 0 0;color:var(--muted);max-width:36em}

/* Fichas de proyecto */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:22px;display:flex;flex-direction:column;gap:12px;min-width:0}
.card h3{font-size:1.3rem;font-weight:700}
.card p{margin:0;color:var(--muted);font-size:.98rem}
.spec{margin:auto 0 0;display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-family:var(--mono);font-size:.78rem;border-top:1px dashed var(--line);padding-top:12px}
.spec dt{color:var(--muted)}
.spec dd{margin:0}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a:hover{color:var(--accent)}
.mas{font-family:var(--display);font-weight:700;font-size:.92rem;text-decoration:none}
.chip{display:inline-block;font-family:var(--mono);font-size:.7rem;padding:2px 8px;border-radius:99px;border:1px solid var(--line);color:var(--muted);align-self:flex-start}

.vacio{grid-column:1/-1;display:flex;gap:32px;align-items:center;flex-wrap:wrap;border:2px dashed var(--line);border-radius:8px;padding:36px 32px}
.vacio>div{flex:1 1 300px;min-width:0;display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.vacio h3{font-size:1.4rem}
.vacio p{margin:0;color:var(--muted);max-width:40em}
.price.mini{padding:16px 22px 14px 40px;justify-self:auto}
.price.mini::before{left:14px;width:12px;height:12px;margin-top:-6px}
.price.mini strong{font-size:3rem}

/* Guías */
.guides{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.guide{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;padding:20px 0;border-bottom:1px solid var(--line)}
.guide .lvl{font-family:var(--mono);font-size:.72rem;color:var(--accent);padding-top:5px;min-width:7ch}
.guide h3{font-size:1.15rem;font-weight:700}
.guide h3 a{color:var(--ink);text-decoration:none}
.guide h3 a:hover{color:var(--accent)}
.min{font-family:var(--mono);font-size:.75rem;white-space:nowrap}
.guide p{grid-column:2;margin:0;color:var(--muted);font-size:.95rem}

/* Glosario */
.gloss{display:grid;grid-template-columns:repeat(2,1fr);gap:22px 40px;margin:0}
.gloss div{min-width:0}
.gloss dt{font-family:var(--display);font-weight:700;font-size:1.1rem}
.gloss dd{margin:4px 0 0;color:var(--muted)}

/* Boletín */
.news{background:var(--ink);color:var(--bg)}
.news .wrap{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;padding-block:52px}
.news h2{font-size:clamp(1.6rem,3vw,2.2rem)}
.news p{opacity:.8;margin:10px 0 0}
form{display:flex;gap:10px;flex-wrap:wrap}
form input{flex:1 1 220px;min-width:0;font:inherit;padding:12px 14px;border-radius:6px;border:0;background:var(--bg);color:var(--ink)}
form button{font-family:var(--display);font-weight:700;font-size:1rem;padding:12px 20px;border-radius:6px;border:0;background:var(--tag);color:var(--tag-ink);cursor:pointer}
.check{flex-basis:100%;display:flex;gap:10px;align-items:flex-start;font-size:.9rem;opacity:.9}
.check input{flex:0 0 auto;width:18px;height:18px;margin-top:3px;accent-color:var(--tag)}
.news a{color:var(--tag)}
.capa{flex-basis:100%;margin:6px 0 0;font-size:.78rem;line-height:1.5;opacity:.75}
.capa b{font-weight:600}
footer nav ul{gap:18px;font-size:.9rem}
footer nav a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}
#msg{flex-basis:100%;margin:4px 0 0;font-family:var(--mono);font-size:.8rem;opacity:.85}

footer .wrap{padding-block:30px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.9rem}

@media (max-width:860px){
  .hero .wrap,.news .wrap{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr}
  .price{justify-self:start}
}
@media (max-width:600px){
  .grid,.guides,.gloss{grid-template-columns:1fr}
  nav ul{gap:16px}
}
@media (prefers-reduced-motion:reduce){.btn:hover{transform:none}}

.legal .wrap{max-width:760px;padding-block:48px 64px}
.legal h1{font-size:clamp(2.2rem,5vw,3.2rem);font-weight:800;margin:10px 0 0}
.legal .intro{color:var(--muted);font-size:1.12rem}
.legal section{padding-top:36px;margin-top:36px;border-top:1px solid var(--line);scroll-margin-top:16px}
.legal h2{font-size:1.9rem;font-weight:700;margin-bottom:12px}
.legal h3{font-size:1.15rem;font-weight:700;margin:26px 0 6px}
.legal p,.legal li{max-width:65ch}
.legal ul{padding-left:1.2em}
.datos{display:grid;grid-template-columns:auto 1fr;gap:8px 20px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:18px 20px;margin:18px 0}
.datos dt{font-family:var(--mono);font-size:.78rem;color:var(--muted);padding-top:3px}
.datos dd{margin:0;min-width:0;overflow-wrap:anywhere}
mark{background:var(--tag);color:var(--tag-ink);padding:0 4px;border-radius:3px}
.tabla{overflow-x:auto;margin:14px 0}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:.92rem}
th,td{text-align:left;vertical-align:top;padding:10px 12px;border-bottom:1px solid var(--line)}
th{font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600}
.destacado{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--tag);padding:14px 18px;border-radius:4px;font-size:1.08rem}
@media (max-width:600px){.datos{grid-template-columns:1fr;gap:2px}.datos dd{margin-bottom:10px}}

.articulo .wrap{max-width:760px;padding-block:40px 64px}
.miga{font-family:var(--mono);font-size:.8rem;color:var(--muted);margin:0 0 18px}
.miga a{color:var(--muted)}
.articulo h1{font-size:clamp(2.6rem,7vw,4rem);font-weight:800;letter-spacing:-.02em;margin:12px 0 0}
.entradilla{font-size:1.22rem;color:var(--muted);max-width:36em;margin:16px 0 0}
.ficha{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden;margin:32px 0 8px}
.ficha div{background:var(--surface);padding:14px 16px;min-width:0}
.ficha dt{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.ficha dd{margin:4px 0 0;font-family:var(--display);font-weight:700;font-size:1.02rem}
.ficha div:first-child dd{display:inline-block;background:var(--tag);color:var(--tag-ink);padding:0 6px;border-radius:3px;font-variant-numeric:tabular-nums}
.articulo section{margin-top:40px}
.articulo h2{font-size:1.7rem;font-weight:700;margin-bottom:10px}
.articulo p,.articulo li{max-width:65ch}
.articulo ul{padding-left:1.2em;display:grid;gap:8px}
.articulo .label{margin:18px 0 6px}
pre{background:var(--ink);color:var(--bg);padding:14px 16px;border-radius:6px;overflow-x:auto;font-family:var(--mono);font-size:.85rem;margin:0}
.nota{font-size:.9rem;color:var(--muted)}
@media (max-width:600px){.ficha{grid-template-columns:1fr 1fr}}

.articulo h3{font-size:1.2rem;font-weight:700;margin:24px 0 8px}
.articulo ol{padding-left:1.4em;display:grid;gap:10px}
.articulo :not(pre)>code{font-family:var(--mono);font-size:.86em;background:var(--surface);border:1px solid var(--line);padding:1px 5px;border-radius:4px;white-space:nowrap}
.articulo td code{white-space:nowrap}
.meta{font-family:var(--mono);font-size:.78rem;color:var(--muted);margin:14px 0 0}
.capas{display:grid;gap:0;margin:16px 0}
.capas div{padding:12px 0 12px 16px;border-left:3px solid var(--line)}
.capas div:nth-child(1){margin-left:0}.capas div:nth-child(2){margin-left:14px}.capas div:nth-child(3){margin-left:28px}.capas div:nth-child(4){margin-left:42px}.capas div:nth-child(5){margin-left:56px;border-left-color:var(--tag)}
.capas dt{font-family:var(--display);font-weight:700}
.capas dd{margin:2px 0 0;color:var(--muted)}
.comparar{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:16px 0}
.comparar>div{border:1px solid var(--line);border-radius:8px;padding:14px 16px;background:var(--surface);min-width:0}
.comparar .bien{border-color:var(--accent);border-width:2px}
.comparar p{margin:6px 0 0}
.comparar .mal p{color:var(--muted)}
.siguiente{margin-top:48px;padding-top:24px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.siguiente a{font-family:var(--display);font-weight:700;font-size:1.2rem;text-decoration:none}
@media (max-width:600px){.comparar{grid-template-columns:1fr}.capas div{margin-left:0!important}}