:root{
  --bg:#ffffff;
  --card:#ffffff;
  --text:#0f172a;      /* slate-900 */
  --muted:#475569;     /* slate-600 */
  --accent:#2563eb;    /* blue-600 */
  --accent-weak: rgba(37,99,235,.10);
  --border:#e2e8f0;    /* slate-200 */
  --shadow: 0 6px 20px rgba(15,23,42,.06);
  --shadow-sm: 0 2px 10px rgba(15,23,42,.05);
}

*{box-sizing:border-box;}
html,body{
  margin:0;padding:0;
  font-family: system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Noto Sans",sans-serif;
  background:var(--bg);
  color:var(--text);
}

a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1080px;margin:0 auto;padding:22px;}

.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 0;
  border-bottom:1px solid var(--border);
  position:sticky; top:0;
  background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(10px);
  z-index:10;
}

/* ===== brand / logo ===== */
.brand{
  display:flex;align-items:center;gap:10px;
  font-weight:800; letter-spacing:.2px;
  color:var(--text);
}
.brand img{
  height:32px; width:auto; display:block;
}

.navlinks{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.navlinks a{
  color:var(--text);
  padding:6px 8px;
  border-radius:10px;
}
.navlinks a:hover{
  background:rgba(15,23,42,.04);
  text-decoration:none;
}

.lang{display:flex;gap:8px;align-items:center}
.lang .btn{padding:7px 10px;border-radius:10px;font-size:14px}

.hero{padding:26px 0 14px}

h1{margin:0 0 10px;font-size:34px;line-height:1.15}
h2{margin:20px 0 10px;font-size:22px;line-height:1.25}
h3{margin:0 0 8px;font-size:18px;line-height:1.25}

p{color:var(--muted);line-height:1.75;margin:0 0 10px}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.grid{grid-template-columns:1fr}}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:16px;
  box-shadow: var(--shadow-sm);
}
.card:hover{box-shadow: var(--shadow);}

.badge{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:999px;
  border:1px solid var(--border);
  color:var(--muted);
  font-size:12px;
  background:rgba(15,23,42,.02);
}

.btns{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:#fff;
  color:var(--text);
  cursor:pointer;
  box-shadow: 0 1px 0 rgba(15,23,42,.02);
}
.btn:hover{
  text-decoration:none;
  border-color: rgba(37,99,235,.35);
  box-shadow: var(--shadow-sm);
}

.btn.primary{
  background: var(--accent);
  border-color: var(--accent);
  color:#fff;
}
.btn.primary:hover{
  filter: brightness(0.98);
}

hr{
  border:none;
  border-top:1px solid var(--border);
  margin:18px 0;
}

.kv{
  display:grid;
  grid-template-columns:160px 1fr;
  gap:10px
}
@media(max-width:620px){.kv{grid-template-columns:1fr}}

.kv div{
  padding:10px;
  border:1px solid var(--border);
  border-radius:12px;
  background:rgba(15,23,42,.02);
}
.kv .k{
  color:var(--text);
  font-weight:700;
  background:rgba(37,99,235,.06);
  border-color: rgba(37,99,235,.18);
}

.notice{
  border:1px solid rgba(37,99,235,.22);
  background: var(--accent-weak);
  border-radius:14px;
  padding:12px 14px;
  color: var(--text);
}
.notice b{color: var(--text);}

.code{
  font-family: ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
  font-size:13px;
  color:#0f2b7a;
  background: rgba(37,99,235,.06);
  border: 1px solid rgba(37,99,235,.18);
  padding:10px 12px;
  border-radius:12px;
}

.footer{
  padding:22px 0;
  color:var(--muted);
  border-top:1px solid var(--border);
  margin-top:26px;
  font-size:14px
}