/* Blackout documentation site. Plain CSS, no build step. */

:root {
  --bg: #080808;
  --surface: #121212;
  --border: #2a2a2a;
  --text: #f2f2f2;
  --muted: #9c9c9c;
  --accent: #00ff57;
  --accent-ink: #080808;
  --highlight: #ff0066;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-padding-top: 5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--sans);
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--accent-ink);
  z-index: 10;
}
.skip-link:focus { top: 1rem; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  background: rgb(8 8 8 / 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.brand {
  color: var(--text);
  text-decoration: none;
  font: 700 1rem/1 var(--mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.brand span { color: var(--accent); }

.topnav { display: flex; gap: 1.25rem; font: 0.8rem var(--mono); text-transform: uppercase; letter-spacing: 0.1em; }
.topnav a { color: var(--muted); text-decoration: none; padding: 0.25rem 0; }
.topnav a:hover, .topnav a[aria-current="page"] { color: var(--text); }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  max-width: 76rem;
  margin: 0 auto;
  padding: 2.5rem clamp(1rem, 4vw, 2.5rem) 5rem;
}

.sidebar { position: sticky; top: 5rem; align-self: start; max-height: calc(100vh - 6rem); overflow: auto; }
.sidebar p { margin: 1.25rem 0 0.4rem; font: 0.72rem var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: 0.14em; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar a { display: block; padding: 0.2rem 0; color: var(--text); text-decoration: none; font-size: 0.92rem; }
.sidebar a:hover { color: var(--accent); }

main { min-width: 0; }

.eyebrow { margin: 0 0 0.5rem; font: 0.75rem var(--mono); color: var(--accent); text-transform: uppercase; letter-spacing: 0.16em; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.01em; }
h1 { margin: 0 0 1rem; font-size: clamp(2.2rem, 6vw, 3.6rem); text-transform: uppercase; }
h2 { margin: 3.5rem 0 1rem; padding-top: 1.5rem; border-top: 1px solid var(--border); font-size: 1.7rem; }
h3 { margin: 2rem 0 0.5rem; font-size: 1.15rem; }

.lead { font-size: 1.15rem; color: var(--muted); max-width: 42rem; }

code, kbd { font: 0.88em var(--mono); background: var(--surface); border: 1px solid var(--border); padding: 0.1em 0.35em; }

.callout {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border-left: 3px solid var(--accent);
}
.callout--warning { border-left-color: var(--highlight); }
.callout p { margin: 0; }
.callout p + p { margin-top: 0.5rem; }

table { width: 100%; border-collapse: collapse; margin: 1rem 0 1.5rem; font-size: 0.94rem; }
th, td { text-align: left; vertical-align: top; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--border); }
th { font: 0.75rem var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }
.table-wrap { overflow-x: auto; }

details { border-bottom: 1px solid var(--border); padding: 0.9rem 0; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 0.6rem 0 0; color: var(--muted); }

.button {
  display: inline-block;
  padding: 0.85rem 1.4rem;
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 0.8rem var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  text-decoration: none;
  border: 0;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 2rem clamp(1rem, 4vw, 2.5rem);
  color: var(--muted);
  font: 0.8rem var(--mono);
  text-align: center;
}

@media (max-width: 800px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding-top: 1.5rem; }
  .sidebar { position: static; max-height: none; border: 1px solid var(--border); padding: 0 1rem 1rem; }
  .topnav { gap: 0.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* Support form */
.support-form { display: grid; gap: 1.25rem; max-width: 40rem; margin: 2rem 0 1rem; }
.field { display: grid; gap: 0.4rem; }
.field label { font: 0.78rem var(--mono); text-transform: uppercase; letter-spacing: 0.12em; }
.optional { color: var(--muted); text-transform: none; letter-spacing: 0; }
.field input, .field textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid #5a5a5a;
  border-radius: 0;
  font: inherit;
}
.field input:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--highlight); }
.field input[type="file"] { padding: 0.6rem; }
.hint { margin: 0; color: var(--muted); font-size: 0.85rem; }
.field--trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.support-form .button { justify-self: start; cursor: pointer; }
.support-form .button[disabled] { opacity: 0.6; cursor: progress; }
.form-status { margin: 0; min-height: 1.5em; }
.form-status--error { color: var(--highlight); }
.form-status--success { color: var(--accent); }