:root{
  --bg:#07101d;--panel:#111827;--panel2:#1e293b;--text:#e5e7eb;--muted:#9fb3cf;
  --line:rgba(255,255,255,.12);--accent:#38bdf8;--green:#22c55e;--orange:#f59e0b;
  --red:#ef4444;--purple:#a855f7;--shadow:0 18px 55px rgba(0,0,0,.35);
}
*{box-sizing:border-box;scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:radial-gradient(circle at top left,rgba(56,189,248,.17),transparent 30%),radial-gradient(circle at top right,rgba(168,85,247,.12),transparent 30%),linear-gradient(180deg,#06101d,#111827);line-height:1.6}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.layout{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;overflow:auto;background:rgba(5,14,26,.96);border-right:1px solid var(--line);padding:18px}
.logo{display:flex;align-items:center;gap:12px;font-weight:900;text-transform:uppercase;margin-bottom:18px}
.logo-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(135deg,var(--accent),#2563eb);display:grid;place-items:center;color:#020617}
.nav-section{margin:18px 0 8px;color:#60a5fa;font-weight:900;font-size:.76rem;text-transform:uppercase;border-top:1px solid var(--line);padding-top:14px}
.nav-link{display:flex;align-items:center;gap:10px;padding:10px 11px;border-radius:11px;color:var(--text);font-size:.94rem}
.nav-link:hover,.nav-link.active{background:#1e40af;color:white;text-decoration:none}
.main{min-width:0}.topbar{position:sticky;top:0;z-index:50;background:rgba(7,16,29,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:14px 22px;display:flex;gap:12px;align-items:center;justify-content:space-between}
.search-global{max-width:720px;width:100%}.search-global input,input,select{width:100%;padding:13px 15px;border-radius:13px;border:1px solid var(--line);background:#0f172a;color:var(--text);outline:none}
.container{width:min(1500px,96%);margin:auto;padding:22px 0 50px}
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;margin-bottom:22px}
.card,.tool-card,.panel{background:rgba(17,24,39,.86);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow)}
h1{font-size:clamp(2.2rem,4vw,4.6rem);line-height:1.04;margin:0 0 12px;letter-spacing:-1.7px}
h2{color:white;margin:0 0 12px}h3{color:white;margin:0 0 8px}h4{margin:14px 0 8px;color:#dbeafe}
p{color:var(--muted);margin-top:0}.eyebrow{display:inline-block;padding:6px 12px;border-radius:999px;color:var(--green);background:rgba(34,197,94,.09);border:1px solid rgba(34,197,94,.25);font-weight:900;font-size:.82rem;margin-bottom:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.stat{background:rgba(30,41,59,.76);border:1px solid var(--line);border-radius:17px;padding:18px}.stat strong{display:block;color:white;font-size:2rem;line-height:1.1}
.section{margin:24px 0}.toolbar{display:grid;grid-template-columns:1.4fr .75fr .65fr .45fr;gap:10px;margin:16px 0}
button,.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:12px;padding:11px 14px;background:var(--panel2);color:var(--text);font-weight:900;cursor:pointer}
.btn.primary,button.primary{background:linear-gradient(135deg,var(--accent),#2563eb);color:#020617;border:0}.btn.danger{background:rgba(239,68,68,.16);color:#fca5a5}
.tool-card{background:rgba(30,41,59,.74);padding:18px;transition:.18s}.tool-card:hover{transform:translateY(-3px);border-color:rgba(56,189,248,.45)}
.tool-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.tags{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}
.tag,.level{display:inline-flex;padding:5px 9px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.05);font-size:.75rem;font-weight:900}
.level.Básico{color:var(--green);border-color:rgba(34,197,94,.35)}.level.Medio{color:var(--orange);border-color:rgba(245,158,11,.35)}.level.Avanzado{color:#f87171;border-color:rgba(239,68,68,.35)}
pre{background:#050b14;color:#d1fae5;border:1px solid rgba(34,197,94,.2);border-radius:13px;padding:13px;overflow:auto}
table{width:100%;border-collapse:collapse;margin-top:12px}th,td{padding:13px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:rgba(56,189,248,.12);color:white}td{color:var(--muted)}
.notice{border-left:4px solid var(--orange);background:rgba(245,158,11,.08);color:#fbbf24;border-radius:13px;padding:14px 16px}
.hidden{display:none!important}.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:#0f172a;border:1px solid var(--line);border-radius:999px;padding:10px 14px;display:none;z-index:1000;font-weight:900}
.footer{text-align:center;color:var(--muted);padding:30px;border-top:1px solid var(--line)}
.utility{background:rgba(30,41,59,.7);border:1px solid var(--line);border-radius:16px;padding:16px}
@media(max-width:1100px){.layout{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.hero{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.toolbar{grid-template-columns:1fr}}