/* ====== Base ====== */
:root{
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --accent-2: #60a5fa;
  --border: #1f2937;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
  --radius: 16px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:linear-gradient(180deg, #0b1220, #0f172a 30%);
  color:var(--text);
  font:16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

.container{width:min(1100px, 92%); margin-inline:auto}

.site-header{
  padding:48px 0 28px;
  background: radial-gradient(60% 100% at 50% 0%, #1f2937 0%, rgba(31,41,55,0) 60%);
  border-bottom:1px solid var(--border);
}
h1{font-size:clamp(1.6rem, 2.8vw, 2.4rem); margin:0 0 6px}
.subtitle{color:var(--muted); margin:0}

.toc{
  background:var(--card);
  border:1px solid var(--border);
  padding:16px 18px;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  margin:22px 0;
}
.toc h2{margin:0 0 8px; font-size:1.1rem; color:#cbd5e1}
.toc a{color:var(--accent-2); text-decoration:none}
.toc a:hover{text-decoration:underline}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
  margin:22px 0;
}

.step h2{margin-top:0}
.grid{display:grid; grid-template-columns:1fr; gap:16px}
@media (min-width:800px){
  .grid{grid-template-columns:1fr 1fr}
}

/* ====== Code blocks with copy ====== */
.codeblock{
  position:relative;
  margin:14px 0;
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
  background:#0b1220;
}
.codeblock pre{
  margin:0; padding:16px 18px; overflow:auto;
}
.codeblock code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size:.95rem;
  color:#e5e7eb;
  white-space:pre;
}
.copy-btn{
  position:absolute;
  top:10px; right:10px;
  border:1px solid var(--border);
  background:#111827;
  color:#cbd5e1;
  padding:6px 10px;
  font-size:.85rem;
  border-radius:10px;
  cursor:pointer;
  transition:all .15s ease;
}
.copy-btn:hover{transform:translateY(-1px); border-color:#334155}
.copy-btn.copied{background:var(--accent); color:#052e16; border-color:#16a34a}

.site-footer{
  text-align:center;
  color:var(--muted);
  padding:24px 0 40px;
}