:root{
  --bg:#f5f7fa; --surface:#fff; --surface-2:#eef1f6; --ink:#141a29; --muted:#5a6474;
  --line:#e3e7ee; --accent:#2f6df0; --accent-ink:#fff; --accent-soft:#eaf1ff;
  --radius:14px; --shadow:0 1px 2px rgba(20,30,60,.04),0 8px 24px rgba(20,30,60,.06);
  --maxw:1120px;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0c0f16; --surface:#151a23; --surface-2:#1b222d; --ink:#e7ebf3; --muted:#95a0b2;
  --line:#262e3b; --accent:#6f9bff; --accent-ink:#0c0f16; --accent-soft:#172236;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.4);
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
main{max-width:var(--maxw);margin:0 auto;padding:1.5rem}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em}

/* Header */
.site-header{position:sticky;top:0;z-index:20;display:flex;flex-wrap:wrap;gap:.6rem 1rem;
  justify-content:space-between;align-items:center;padding:.7rem 1.4rem;
  background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:700;color:var(--ink)}
.brand:hover{text-decoration:none}.brand .mark{border-radius:7px;flex:none}
.brand-name{font-size:1.05rem;letter-spacing:.02em}
.brand-full{font-weight:500;color:var(--muted);font-size:.92rem}
@media(max-width:560px){.brand-full{display:none}}
.site-header nav{display:flex;align-items:center;gap:.3rem;flex-wrap:wrap}
.site-header nav a{padding:.4rem .7rem;border-radius:8px;color:var(--muted);font-weight:500;font-size:.95rem}
.site-header nav a:hover{color:var(--ink);background:var(--surface-2);text-decoration:none}
.nav-cta{color:var(--accent-ink)!important;background:var(--accent);font-weight:600!important}
.nav-cta:hover{background:var(--accent)!important;filter:brightness(1.05);color:var(--accent-ink)!important}

/* Hero */
.hero{background:
  radial-gradient(70rem 30rem at 80% -10%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 60%),
  radial-gradient(50rem 25rem at 0% 0%,color-mix(in srgb,var(--accent) 9%,transparent),transparent 55%);
  border-bottom:1px solid var(--line)}
.hero-in{max-width:var(--maxw);margin:0 auto;padding:3.6rem 1.5rem 3rem}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.72rem;font-weight:700;color:var(--accent);margin:0 0 .8rem}
.hero h1{font-size:clamp(2rem,5vw,3.1rem);margin:0 0 .8rem;font-weight:800}
.lead{color:var(--muted);font-size:1.12rem;max-width:40rem;margin:0 0 1.6rem}
.hero-cta{display:flex;gap:.7rem;flex-wrap:wrap}
.hero-stats{display:flex;gap:2.4rem;margin-top:2.4rem;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{font-size:1.7rem;font-weight:800}
.hero-stats span{color:var(--muted);font-size:.86rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.62rem 1.15rem;border-radius:10px;
  font-weight:600;font-size:.96rem;border:1px solid transparent;cursor:pointer;transition:.15s}
.btn:hover{text-decoration:none}
.btn.primary{background:var(--accent);color:var(--accent-ink)}.btn.primary:hover{filter:brightness(1.06)}
.btn.ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}.btn.ghost:hover{background:var(--surface-2)}

/* Toolbar: search + chips */
.toolbar{position:sticky;top:56px;z-index:10;padding:1rem 0 .8rem;background:linear-gradient(var(--bg),var(--bg) 70%,transparent)}
.search{display:flex;align-items:center;gap:.5rem;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:.1rem .9rem;max-width:32rem;box-shadow:var(--shadow)}
.search:focus-within{border-color:var(--accent)}
.search-ico{color:var(--muted);font-size:1.2rem}
.search input{flex:1;border:0;background:transparent;color:var(--ink);font-size:1rem;padding:.6rem 0;outline:none}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.8rem}
.chip{display:inline-flex;align-items:center;gap:.4rem;padding:.32rem .7rem;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);color:var(--muted);font-size:.82rem;cursor:pointer;transition:.12s}
.chip:hover{color:var(--ink);border-color:var(--muted)}
.chip.active{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.chip .dot{width:.6rem;height:.6rem;border-radius:50%}
.result-count{color:var(--muted);font-size:.85rem;margin:.4rem 0 1rem}
.noresults{color:var(--muted);padding:2rem 0}

/* Grid & cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:1.1rem}
.card{position:relative;display:flex;flex-direction:column;gap:.55rem;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.15rem 1.15rem;
  color:inherit;overflow:hidden;transition:transform .15s,box-shadow .15s,border-color .15s}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:var(--cat,var(--accent))}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--cat) 45%,var(--line));text-decoration:none}
.card-top{display:flex;align-items:center;gap:.55rem}
.cat-icon{display:grid;place-items:center;width:2rem;height:2rem;border-radius:9px;font-size:1.1rem;
  background:color-mix(in srgb,var(--cat) 15%,var(--surface))}
.cat-chip{font-size:.74rem;font-weight:600;color:var(--cat);background:color-mix(in srgb,var(--cat) 12%,var(--surface));
  padding:.2rem .55rem;border-radius:999px}
.card h3{margin:.1rem 0 0;font-size:1.04rem;font-weight:700}
.card p{margin:0;color:var(--muted);font-size:.9rem;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:auto;padding-top:.4rem;font-size:.76rem;color:var(--muted)}
.card-meta span{background:var(--surface-2);padding:.16rem .5rem;border-radius:6px}
.card-meta .lic{background:transparent;border:1px solid var(--line)}
.tag{background:transparent!important;border:1px dashed var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.68rem}

/* Dataset page */
.dataset{max-width:52rem}
.dataset h1{margin:.3rem 0 .6rem;font-size:clamp(1.5rem,3.5vw,2.1rem)}
.breadcrumb{margin:0 0 1rem}.breadcrumb a{color:var(--muted)}
.cat{display:inline-block;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--accent)}
.desc{color:var(--muted);max-width:48rem;font-size:1.05rem}
.ficha{display:grid;grid-template-columns:max-content 1fr;gap:.4rem 1.4rem;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.3rem;max-width:42rem;box-shadow:var(--shadow)}
.ficha dt{font-weight:600;color:var(--muted)}.ficha dd{margin:0}
.actions{display:flex;gap:.7rem;flex-wrap:wrap;margin:1.4rem 0}
.nota{color:#8a5a00;background:#fff7e6;border:1px solid #f0dfb8;border-radius:10px;padding:.55rem .9rem;max-width:42rem}
@media(prefers-color-scheme:dark){.nota{color:#f0c675;background:#2a2311;border-color:#4a3d18}}
.pending{color:var(--muted);font-style:italic}
.challenge{background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 30%,var(--line));
  border-radius:var(--radius);padding:1.1rem 1.3rem;margin-top:1.6rem;max-width:48rem}
.challenge h2{margin:.1rem 0 .6rem;font-size:1.15rem}.ch-q{font-weight:600;font-size:1.06rem;margin:.2rem 0 .9rem}
.challenge dl.ch{display:grid;grid-template-columns:max-content 1fr;gap:.4rem 1rem;margin:0}
.challenge dl.ch dt{font-weight:700;color:var(--accent)}.challenge dl.ch dd{margin:0}
.ch-forum{font-size:.85rem;color:var(--muted);margin:1rem 0 0}
.hint{font-size:.86rem;color:var(--muted);max-width:44rem}

/* Prose / legal */
.prose{max-width:52rem}.prose h1{font-size:clamp(1.5rem,3.5vw,2.1rem)}
.prose h2{margin-top:2rem;font-size:1.2rem}.prose ul{padding-left:1.2rem}.prose li{margin:.3rem 0}
.prose code{background:var(--surface-2);padding:.05rem .35rem;border-radius:5px;font-size:.85em}
.draft{background:#fff7e6;border:1px solid #f0dfb8;border-radius:10px;padding:.6rem .9rem;color:#8a5a00;font-size:.9rem}
@media(prefers-color-scheme:dark){.draft{color:#f0c675;background:#2a2311;border-color:#4a3d18}}
table.lives{border-collapse:collapse;width:100%;font-size:.9rem;margin:1rem 0}
table.lives th,table.lives td{border:1px solid var(--line);padding:.55rem .75rem;text-align:left;vertical-align:top}
table.lives th{background:var(--surface-2)}

/* Footer */
.site-footer{border-top:1px solid var(--line);margin-top:3.5rem;color:var(--muted);font-size:.85rem;background:var(--surface)}
.foot-links{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;gap:.6rem 1.5rem;
  justify-content:space-between;align-items:center;padding:1.3rem 1.5rem}
.foot-links nav a{margin-left:1rem;color:var(--muted);white-space:nowrap}.foot-links nav a:hover{color:var(--ink)}
.foot-eu{display:flex;gap:1.1rem;align-items:center;flex-wrap:wrap;background:#003399;color:#fff;padding:1.1rem 1.5rem}
.foot-eu img{height:auto;max-width:200px}.foot-eu p{margin:0;font-size:.76rem;max-width:62rem;opacity:.95}