:root{
  --bg:#0b1220;
  --text:#e8eefc;
  --muted:#a9b6d6;
  --brand:#6aa8ff;
  --brand2:#7cf3c2;
  --border:rgba(255,255,255,.10);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
  --max: 980px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
}

*{ box-sizing:border-box; }

html, body{ height:100%; }

body{
  margin:0;
  font-family: var(--sans);
  color: var(--text);
  line-height: 1.6;

  background:
    radial-gradient(1100px 600px at 20% 0%, rgba(106,168,255,.22), transparent 60%),
    radial-gradient(900px 600px at 90% 10%, rgba(124,243,194,.16), transparent 55%),
    radial-gradient(900px 700px at 60% 100%, rgba(255,255,255,.05), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-size: cover;

  min-height: 100vh;

  display:flex;
  flex-direction:column;
}

main{ flex: 1 0 auto; }

footer{
  flex: 0 0 auto;
  margin-top:22px;
  padding:18px 0 28px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:14px;
}

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
}

header{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(1.2) blur(10px);
  background: rgba(11,18,32,.65);
  border-bottom: 1px solid var(--border);
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.logo{
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:700;
}

.mark{
  width:34px;
  height:34px;
  border-radius:10px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: var(--shadow);
}

nav.links{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
}

a{
  color: var(--muted);
  text-decoration:none;
  font-size:14px;
  padding:8px 10px;
  border-radius:10px;
}

a:hover{
  background: rgba(255,255,255,.06);
  color: var(--text);
}

a.active{
  color: var(--text);
  background: rgba(255,255,255,.06);
}

.card{
  background: rgba(16,26,46,.7);
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.hero{ padding: 34px 0 10px; }

h1{
  margin:0 0 10px;
  font-size: clamp(28px, 4vw, 44px);
  line-height:1.1;
}

h2{
  margin: 20px 0 10px;
  font-size: 20px;
}

p{
  margin:0 0 12px;
  color: var(--muted);
}

ul{
  margin: 8px 0 0 18px;
  color: var(--muted);
}

li{ margin:6px 0; }

.grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap:14px;
  margin-top:14px;
}

@media (max-width: 760px){
  .grid{ grid-template-columns: 1fr; }
  .topbar{ align-items:flex-start; flex-direction:column; }
}

.btn{
  display:inline-block;
  text-decoration:none;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.05);
  color: var(--text);
  font-size:14px;
}

.btn:hover{ background: rgba(255,255,255,.08); }

.code{
  font-family: var(--mono);
  font-size: 12px;
  background: rgba(0,0,0,.25);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  overflow:auto;
  color:#dfe8ff;
}

.note{
  border:1px dashed rgba(255,255,255,.18);
  background: rgba(255,255,255,.02);
  border-radius: 14px;
  padding: 12px;
  color: var(--muted);
}