:root{
  --bg:#020908;
  --panel:#07100f;
  --text:#e4e7e6;
  --muted:#94a09b;
  --green:#39ff9c;
  --border:rgba(57,255,156,.28);
  --soft:rgba(255,255,255,.08);
}

*{
  box-sizing:border-box;
}

html{
  background:var(--bg);
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    monospace;
  background:
    radial-gradient(circle at 50% 0%,rgba(57,255,156,.09),transparent 32rem),
    linear-gradient(180deg,#020908,#010504);
  line-height:1.65;
}

a{
  color:var(--green);
}

.wrap{
  width:min(960px,calc(100% - 34px));
  margin:0 auto;
}

header{
  padding:64px 0 38px;
  text-align:center;
}

.brand{
  margin:0;
  color:var(--green);
  font-size:clamp(3rem,9vw,5.8rem);
  line-height:1;
  letter-spacing:.025em;
  text-shadow:
    0 0 10px rgba(57,255,156,.75),
    0 0 38px rgba(57,255,156,.25);
}

.subtitle{
  margin:18px 0 0;
  color:#dce2df;
  font-size:clamp(1rem,3vw,1.25rem);
}

.intro{
  max-width:760px;
  margin:24px auto 0;
  color:#b9c3bf;
}

.lang{
  margin-top:28px;
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:10px;
}

.lang a{
  padding:8px 12px;
  border:1px solid var(--border);
  border-radius:8px;
  text-decoration:none;
}

.lang a[aria-current="page"]{
  background:var(--green);
  color:#001a0d;
  font-weight:800;
}

nav{
  margin-top:20px;
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:10px;
}

nav a{
  padding:8px 11px;
  border:1px solid var(--soft);
  border-radius:8px;
  text-decoration:none;
  font-size:.82rem;
}

.panel{
  margin:0 0 22px;
  padding:28px;
  border:1px solid var(--border);
  border-radius:16px;
  background:
    linear-gradient(
      180deg,
      rgba(7,18,16,.94),
      rgba(3,10,9,.96)
    );
  box-shadow:0 24px 70px rgba(0,0,0,.35);
}

h2{
  margin:0 0 18px;
  color:var(--green);
  font-size:1.45rem;
}

h3{
  margin:28px 0 8px;
  color:#e5ece9;
  font-size:1rem;
}

p{
  margin:8px 0;
  color:#c1cac6;
}

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

.card{
  border:1px solid var(--soft);
  border-radius:12px;
  padding:20px;
  background:rgba(255,255,255,.018);
}

.card strong{
  display:block;
  color:var(--green);
  margin-bottom:7px;
}

.code{
  margin-top:15px;
  padding:14px;
  border:1px solid var(--soft);
  border-radius:9px;
  background:#020706;
  color:#bfffdc;
}

.qa{
  padding:18px 0;
  border-top:1px solid var(--soft);
}

.qa:first-of-type{
  border-top:0;
  padding-top:0;
}

.qa strong{
  color:#e9efec;
}

.badge{
  display:inline-block;
  margin-top:20px;
  padding:7px 11px;
  border:1px solid var(--border);
  border-radius:999px;
  color:var(--green);
  font-size:.75rem;
}

.cta{
  display:inline-block;
  margin-top:18px;
  padding:13px 18px;
  background:var(--green);
  color:#001a0d;
  border-radius:9px;
  font-weight:800;
  text-decoration:none;
}

footer{
  padding:26px 0 50px;
  text-align:center;
  color:#74817b;
  font-size:.78rem;
}

.start{
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:24px;
}

.startbox{
  width:min(700px,100%);
  text-align:center;
  padding:42px;
  border:1px solid var(--border);
  border-radius:18px;
  background:var(--panel);
}

@media(max-width:700px){
  header{
    padding-top:42px;
  }

  .panel{
    padding:21px;
  }

  .grid{
    grid-template-columns:1fr;
  }
}