:root{
  --bg:#ffffff;
  --bg2:#f6f8fb;
  --text:#0f172a;
  --muted:#475569;
  --border:#e2e8f0;
  --card:#ffffff;
  --accent:#2563eb;
  --accent2:#0ea5e9;
  --ok:#16a34a;
  --warn:#f59e0b;
  --danger:#ef4444;
  --radius:18px;
  --shadow: 0 10px 30px rgba(2,6,23,.08);
  --max: 1120px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  background: radial-gradient(900px 420px at 20% -10%, rgba(37,99,235,.10), transparent 60%),
              radial-gradient(900px 420px at 80% 0%, rgba(14,165,233,.10), transparent 60%),
              var(--bg);
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--max); margin:0 auto; padding:0 18px}
.main{padding:28px 0 52px}

.nav{
  position:sticky; top:0; z-index:20;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(1.2) blur(10px);
  border-bottom:1px solid var(--border);
}
.nav__inner{display:flex; align-items:center; justify-content:space-between; height:64px}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; letter-spacing:.2px; color:var(--text)}
.brand__mark{font-size:18px}
.brand__text{font-size:16px}
.nav__menu{display:flex; gap:16px; align-items:center}
.nav__menu a{color:var(--text); font-weight:600; padding:10px 10px; border-radius:12px}
.nav__menu a:hover{background:var(--bg2); text-decoration:none}
.nav__toggle{
  display:none;
  border:1px solid var(--border);
  background:var(--card);
  padding:10px 12px;
  border-radius:12px;
  font-weight:700;
}
@media (max-width: 780px){
  .nav__toggle{display:inline-flex}
  .nav__menu{display:none; position:absolute; right:16px; top:64px; flex-direction:column; min-width:220px;
             background:var(--card); border:1px solid var(--border); border-radius:16px; padding:10px; box-shadow:var(--shadow)}
  .nav__menu.is-open{display:flex}
  .nav__menu a{width:100%}
}

.hero{
  background: linear-gradient(180deg, rgba(246,248,251,.95), rgba(255,255,255,.9));
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:26px;
}
.hero__grid{display:grid; grid-template-columns: 1.2fr .8fr; gap:20px; align-items:center}
@media (max-width: 880px){ .hero__grid{grid-template-columns:1fr} }
.kicker{display:inline-flex; align-items:center; gap:8px; padding:8px 10px; border-radius:999px; background:rgba(37,99,235,.08); color:#1d4ed8; font-weight:700; font-size:13px}
h1{font-size:40px; line-height:1.05; margin:14px 0 10px}
@media (max-width: 520px){ h1{font-size:32px} }
.lead{font-size:18px; color:var(--muted); margin:0 0 16px}
.btns{display:flex; flex-wrap:wrap; gap:10px; margin-top:12px}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  border-radius:14px; padding:12px 14px;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text);
  font-weight:800;
  text-decoration:none;
}
.btn--primary{background:linear-gradient(135deg, var(--accent), var(--accent2)); border-color:transparent; color:white}
.btn:hover{text-decoration:none; filter:brightness(.98)}
.badges{display:grid; gap:12px}
.badge{
  border:1px solid var(--border);
  border-radius:16px;
  padding:14px;
  background:rgba(255,255,255,.96);
}
.badge__title{font-weight:900; margin:0 0 6px}
.badge__text{margin:0; color:var(--muted); font-size:14px}

.section{margin-top:24px}
.section h2{margin:0 0 12px; font-size:24px}
.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
}
@media (max-width: 920px){ .grid{grid-template-columns: repeat(2,1fr)} }
@media (max-width: 540px){ .grid{grid-template-columns: 1fr} }

.card{
  border:1px solid var(--border);
  border-radius:18px;
  background:rgba(255,255,255,.96);
  box-shadow: 0 6px 18px rgba(2,6,23,.05);
  padding:16px;
}
.card h3{margin:0 0 6px; font-size:18px}
.card p{margin:0 0 12px; color:var(--muted)}
.meta{font-size:13px; color:var(--muted)}
.pill{
  display:inline-flex; gap:8px; align-items:center;
  padding:6px 10px; border-radius:999px;
  background:rgba(14,165,233,.10); color:#0369a1;
  font-weight:800; font-size:12px;
}

.prose{
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:rgba(255,255,255,.96);
  box-shadow:var(--shadow);
  padding:24px;
}
.prose h1{font-size:34px}
.prose h2{margin-top:26px}
.prose p, .prose li{color:var(--text); line-height:1.65}
.prose .muted{color:var(--muted)}
.prose code{background:var(--bg2); padding:2px 6px; border-radius:8px}
hr{border:none; border-top:1px solid var(--border); margin:22px 0}

.tool{
  margin-top:18px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  background:linear-gradient(180deg, rgba(246,248,251,.95), rgba(255,255,255,.98));
}
.form{display:grid; gap:10px}
label{font-weight:800; font-size:14px}
input, textarea, select{
  width:100%; padding:12px 12px; border-radius:14px;
  border:1px solid var(--border); background:var(--card);
  font: inherit;
}
textarea{min-height:120px; resize:vertical}
.row{display:grid; grid-template-columns:1fr 1fr; gap:10px}
@media (max-width: 700px){ .row{grid-template-columns:1fr} }
.actions{display:flex; flex-wrap:wrap; gap:10px; margin-top:8px}
.btn2{
  border-radius:14px; padding:12px 14px;
  border:1px solid var(--border);
  background:var(--card);
  font-weight:900;
  cursor:pointer;
}
.btn2.primary{background:linear-gradient(135deg, var(--accent), var(--accent2)); border-color:transparent; color:white}
.btn2:disabled{opacity:.6; cursor:not-allowed}
.output{
  border:1px dashed rgba(2,6,23,.25);
  background:rgba(255,255,255,.9);
  border-radius:16px;
  padding:14px;
  white-space:pre-wrap;
  word-break:break-word;
}
.notice{
  border-left:4px solid var(--accent);
  background:rgba(37,99,235,.06);
  padding:12px 14px;
  border-radius:14px;
  color:var(--muted);
}
.small{font-size:13px; color:var(--muted)}
.muted{color:var(--muted)}
.footer{
  border-top:1px solid var(--border);
  background:rgba(255,255,255,.92);
}
.footer__inner{padding:22px 0}
.footer__cols{display:grid; grid-template-columns: 1.3fr 1fr 1fr; gap:16px}
@media (max-width: 860px){ .footer__cols{grid-template-columns:1fr} }
.footer__brand{font-weight:900; margin-bottom:8px}
.footer__title{font-weight:900; margin-bottom:8px}
.footer__list{list-style:none; padding:0; margin:0; display:grid; gap:8px}
.footer__list a{color:var(--text)}
.footer__fineprint{margin-top:16px; display:flex; flex-wrap:wrap; gap:10px; color:var(--muted); font-size:13px}
.sep{opacity:.7}

kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  border:1px solid var(--border);
  border-bottom-width:2px;
  padding:2px 6px;
  border-radius:8px;
  background:var(--bg2);
}

@media print{
  .nav, .footer, .btns, .actions, .no-print{display:none !important}
  body{background:white}
  .prose, .hero, .tool{box-shadow:none}
}