:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #8ab4f8;
  --btn: #3c4043;
  --btn-primary: #8ab4f8;
  --btn-primary-text: #0f1115;
  --border: #2a2e37;
  --max: 52rem;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: #0a0c10;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
pre {
  background: #0a0c10;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  line-height: 1.4;
}
pre code { background: none; padding: 0; }

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(15, 17, 21, 0.92);
  backdrop-filter: blur(8px);
}
.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}
nav { display: flex; flex-wrap: wrap; gap: 0.85rem; font-size: 0.95rem; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}
.hero { margin: 1.5rem 0 2rem; }
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); line-height: 1.25; margin: 0 0 0.75rem; }
.lead { color: var(--muted); font-size: 1.05rem; max-width: 40rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.25rem; }

.btn {
  display: inline-block;
  padding: 0.65rem 1rem;
  border-radius: 8px;
  background: var(--btn);
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--border);
}
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn.primary {
  background: var(--btn-primary);
  color: var(--btn-primary-text);
  border-color: transparent;
  font-weight: 600;
}

.grid3 {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  margin: 2rem 0;
}
.grid3 article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
.grid3 h2 { font-size: 1.05rem; margin: 0 0 0.5rem; }

section { margin: 2rem 0; }
section h2 { margin-top: 0; }
ol, ul { padding-left: 1.25rem; }
li { margin: 0.35rem 0; }
.note {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 0 0.5rem 0.85rem;
  color: var(--muted);
  margin: 1rem 0;
}
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}
.muted { color: var(--muted); }

.card-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
  margin: 1.25rem 0;
  display: grid;
  gap: 0.75rem;
  max-width: 28rem;
}
.card-form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.95rem;
  color: var(--muted);
}
.card-form input,
.card-form select {
  background: #0a0c10;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.55rem 0.65rem;
  font: inherit;
}
.card-form .btn {
  cursor: pointer;
  border: none;
  font: inherit;
  text-align: center;
}
button.btn {
  cursor: pointer;
  font: inherit;
}