/* ====== Variables ====== */
:root {
  --bg: #0c0f12;          /* deep, muted background */
  --bg-elev: #12161b;     /* slight elevation panels */
  --text: #c7cbd1;        /* soft gray text */
  --muted: #9aa2ab;       /* secondary text */
  --heading: #e6e9ef;     /* light headings */
  --accent: #7aa2ff;      /* link accent (cool steel blue) */
  --accent-hover: #9fb8ff;
  --border: #242a31;      /* hairline borders */
  --metal: linear-gradient(180deg,#1a1f26,#0f1317); /* subtle metallic */
  --radius: 10px;
  --shadow: 0 10px 24px rgba(0,0,0,0.35);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
}

/* ====== Reset / Base ====== */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  padding: 0 16px;
}

/* ====== Layout container ====== */
.container {
  max-width: 840px;
  margin: 0 auto;
  padding: 40px 0 80px;
}

/* ====== Headings ====== */
h1, h2, h3, h4 {
  color: var(--heading);
  margin: 0 0 16px;
  letter-spacing: 0.2px;
}
h1 { font-size: 2.2rem; line-height: 1.2; }
h2 { font-size: 1.6rem; margin-top: 36px; }
h3 { font-size: 1.25rem; margin-top: 28px; }

/* Intro block (hero-like) */
.hero {
  background: var(--metal);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin: 24px 0 36px;
}
.hero p { margin: 0; color: var(--muted); }

/* ====== Text elements ====== */
p { margin: 0 0 16px; }
strong { color: var(--heading); }
small, .muted { color: var(--muted); }

/* Lists */
ul, ol { padding-left: 22px; margin: 0 0 16px; }
li { margin: 6px 0; }

/* ====== Links ====== */
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--border);
}
a:hover { color: var(--accent-hover); border-bottom-color: var(--accent-hover); }

/* ====== Cards / sections ====== */
.section {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 18px 0;
}

/* Grid for feature lists */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 760px) {
  .grid { grid-template-columns: 1fr 1fr; }
}

/* ====== Code / pre ====== */
code, pre {
  font-family: var(--mono);
  background: #0a0d10;
  border: 1px solid var(--border);
  color: #cfe1ff;
  border-radius: 8px;
}
code { padding: 2px 6px; }
pre { padding: 14px; overflow-x: auto; }

/* ====== Tables ====== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 24px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
th, td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
th {
  text-align: left;
  color: var(--heading);
  background: #151a20;
}

/* ====== Footer ====== */
footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 24px 0;
  color: var(--muted);
  font-size: 0.95rem;
}