/* Blackfire AI site. Palette: Ink, Paper, Hi-vis, Steel. Hi-vis appears only in
   the core of the Blackfire flame; never as an accent. */

:root {
  --ink: #111111;
  --paper: #F5F5F2;
  --hivis: #FF5A1F;
  --steel: #5E626A;

  --bg: var(--paper);
  --surface: #FFFFFF;
  --fg: var(--ink);
  --muted: var(--steel);
  --line: #DCDCD6;
  --term-bg: #111111;
  --term-fg: #F5F5F2;
  --term-muted: #9A9EA5;
  --term-line: #2A2A2A;

  --sans: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --wrap: 1120px;
  --gutter: 24px;
  --r: 6px;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111111;
    --surface: #191919;
    --fg: #F5F5F2;
    --muted: #A3A7AE;
    --line: #2C2C2C;
    --term-bg: #0A0A0A;
    --term-line: #2C2C2C;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 2px solid var(--fg); outline-offset: 3px; border-radius: 2px; }

code, pre, kbd { font-family: var(--mono); font-size: 0.88em; }
:not(pre) > code {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}

h1, h2, h3 { line-height: 1.1; letter-spacing: -0.03em; margin: 0; font-weight: 700; }
h1 { font-size: clamp(40px, 6vw, 68px); }
h2 { font-size: clamp(30px, 4vw, 44px); }
h3 { font-size: 20px; letter-spacing: -0.01em; }
p { margin: 0; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip {
  position: absolute; left: -9999px; top: 8px;
  background: var(--fg); color: var(--bg); padding: 8px 12px; z-index: 10;
}
.skip:focus { left: 8px; }

.label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Header */

.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 64px; flex-wrap: wrap;
}

.bf-lockup {
  display: inline-flex; align-items: center; gap: 8px;
  text-decoration: none; font-weight: 700; font-size: 22px; letter-spacing: -0.04em;
  min-height: 44px;
}
.bf-lockup svg { width: 15px; height: 26px; flex: none; }
.bf-lockup .ai { font-weight: 500; color: var(--muted); letter-spacing: -0.01em; }

.flame-body { fill: currentColor; }
.flame-core { fill: var(--hivis); }

.nav { display: flex; gap: 4px 20px; flex-wrap: wrap; align-items: center; font-size: 15px; }
.nav a { text-decoration: none; color: var(--muted); padding: 10px 0; }
.nav a:hover { color: var(--fg); text-decoration: underline; }
@media (max-width: 600px) { .nav a.opt { display: none; } .nav { gap: 4px 16px; } }

/* Buttons */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 18px;
  border-radius: var(--r); border: 1px solid var(--fg);
  font: 500 15px/1 var(--sans); text-decoration: none; cursor: pointer;
  background: transparent; color: var(--fg);
}
.btn:hover { text-decoration: none; background: var(--surface); }
.btn-solid { background: var(--fg); color: var(--bg); }
.btn-solid:hover { background: var(--fg); opacity: 0.88; }
.btn svg { width: 18px; height: 18px; }

/* Sections */

.section { padding: 88px 0; border-top: 1px solid var(--line); }
.section-head { display: grid; gap: 14px; max-width: 760px; margin-bottom: 44px; }
.section-head p { color: var(--muted); font-size: 19px; }

.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.grid > * { background: var(--bg); padding: 28px; display: grid; gap: 10px; align-content: start; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid p { color: var(--muted); }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* Terminal */

.term {
  background: var(--term-bg); color: var(--term-fg);
  border: 1px solid var(--term-line); border-radius: var(--r);
  font-family: var(--mono); font-size: 14px; line-height: 1.7;
  overflow: hidden; min-width: 0;
}
.term-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px; border-bottom: 1px solid var(--term-line);
  color: var(--term-muted); font-size: 12px; letter-spacing: 0.04em;
}
.term pre { margin: 0; padding: 18px 20px; overflow-x: auto; font-size: inherit; }
.term .c { color: var(--term-muted); }
.term .p { color: var(--term-muted); user-select: none; }

.copy {
  font: 500 12px/1 var(--mono); color: var(--term-fg);
  background: transparent; border: 1px solid var(--term-line); border-radius: 4px;
  min-height: 32px; padding: 0 10px; cursor: pointer;
}
.copy:hover { border-color: var(--term-muted); }

/* Footer */

.site-footer { border-top: 1px solid var(--line); padding: 48px 0 56px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: grid; gap: 24px; }
.footer-row { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; justify-content: space-between; }
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.footer-links a { text-decoration: none; padding: 8px 0; }
.footer-links a:hover { color: var(--fg); text-decoration: underline; }
.fine { max-width: 760px; }