/* ffdrop — datasheet. dark, dense, technical. */

:root {
  --bg: #0a0b0d;
  --bg-soft: #101216;
  --card: #131519;
  --border: #23262e;
  --border-soft: #1b1e24;
  --text: #d8dbe2;
  --muted: #868b96;
  --accent: #5b9dff;
  --code: #9ad0a0;
  --code-bg: #0d0f13;
  --maxw: 980px;
  --mono: "SF Mono", "JetBrains Mono", "Menlo", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; font-weight: 600; }

code, pre, .ver { font-family: var(--mono); }
code {
  font-size: 0.86em;
  color: var(--code);
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: 5px;
  padding: 1px 5px;
  white-space: nowrap;
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  overflow-x: auto;
  margin-top: 14px;
}
pre code {
  border: 0; background: none; padding: 0;
  white-space: pre;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--code);
}
pre var { color: var(--accent); font-style: normal; }

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(18px, 5vw, 40px);
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand img { height: 22px; display: block; }
.nav nav { display: flex; gap: 22px; font-size: 13px; flex-wrap: wrap; }
.nav nav a { color: var(--muted); }
.nav nav a:hover { color: var(--text); text-decoration: none; }

/* ---------- LAYOUT ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(18px, 5vw, 40px); }
section { padding: 46px 0; border-top: 1px solid var(--border-soft); }
section:first-of-type { border-top: 0; }
section > h2 {
  font-size: 22px;
  margin-bottom: 6px;
}
section > h2::before { content: "# "; color: var(--accent); opacity: 0.55; }
.sub {
  font-size: 16px;
  margin: 34px 0 4px;
  color: var(--text);
}
.sub::before { content: "## "; color: var(--accent); opacity: 0.45; font-family: var(--mono); }
.lede { color: var(--muted); margin-bottom: 22px; max-width: 70ch; }
.note { color: var(--muted); font-size: 13px; margin-top: 14px; max-width: 78ch; }
.note code, .reqs code { white-space: normal; }

/* ---------- INTRO ---------- */
.intro { padding-top: 54px; }
.intro h1 {
  font-family: var(--mono);
  font-size: clamp(34px, 7vw, 52px);
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}
.tagline { font-size: 17px; max-width: 68ch; color: var(--text); }
.meta-line {
  display: flex; flex-wrap: wrap; gap: 8px 14px;
  margin: 22px 0 26px;
  font-size: 12.5px; color: var(--muted);
}
.meta-line span { position: relative; }
.meta-line span + span::before {
  content: "·"; position: absolute; left: -9px; opacity: 0.5;
}
.meta-line .ver {
  color: var(--code); background: var(--code-bg);
  border: 1px solid var(--border-soft); border-radius: 5px; padding: 0 6px;
}
.meta-line .ver::before { content: none; }

/* ---------- BUTTONS ---------- */
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.btn {
  display: inline-flex; align-items: center;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600; font-size: 14px;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, transform 0.12s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: #06101f; }
.btn.primary:hover { background: #6fadff; }
.btn.ghost { border-color: var(--border); color: var(--text); }
.btn.ghost:hover { border-color: var(--accent); }
.btn.big { padding: 13px 26px; font-size: 15px; }

/* ---------- TABLE ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 720px; }
thead th {
  text-align: left; font-weight: 600; color: var(--muted);
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 11px 14px; background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
tbody td { padding: 11px 14px; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--bg-soft); }
td:first-child { color: var(--text); font-weight: 500; white-space: nowrap; }
td code { white-space: nowrap; }

/* ---------- TWO-COL ---------- */
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.col {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 22px;
}
.col h3 { font-size: 15px; margin-bottom: 8px; }
.col p { color: var(--muted); font-size: 14px; }
.col pre { font-size: 12px; }

pre.full { margin-top: 6px; }

/* ---------- REQS ---------- */
.reqs { list-style: none; max-width: 80ch; }
.reqs li {
  position: relative; padding: 8px 0 8px 22px;
  color: var(--muted); font-size: 14px;
  border-bottom: 1px solid var(--border-soft);
}
.reqs li:last-child { border-bottom: 0; }
.reqs li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); opacity: 0.7; }

/* ---------- FOOTER ---------- */
footer {
  max-width: var(--maxw); margin: 0 auto;
  border-top: 1px solid var(--border);
  padding: 28px clamp(18px, 5vw, 40px) 48px;
  color: var(--muted); font-size: 13px;
}
footer .muted { font-size: 12px; opacity: 0.7; margin-top: 6px; }

@media (max-width: 680px) {
  .cols { grid-template-columns: 1fr; }
  .nav nav { gap: 14px; }
}