/* FrameTrace site. Colours follow the logo: slate, amber, cyan. System fonts only, so no third-party requests. */

:root {
  --bg: #12161d;
  --bg-raised: #1b212b;
  --line: #2b3340;
  --ink: #eceff4;
  --ink-dim: #a5adba;
  --amber: #ffb45c;
  --amber-deep: #ff8436;
  --cyan: #1af2ff;
  --radius: 10px;
  --width: 760px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}

a { color: var(--amber); text-underline-offset: 3px; }
a:hover { color: var(--ink); }

code, pre {
  font-family: ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  font-size: .9em;
}

code {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: .05em .35em;
}

pre {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .8em 1em;
  overflow-x: auto;
}

pre code { background: none; border: 0; padding: 0; }

.bar {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px max(16px, calc((100% - var(--width)) / 2));
  background: rgba(18, 22, 29, .92);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.bar nav { display: flex; gap: 20px; }
.bar nav a { color: var(--ink-dim); text-decoration: none; }
.bar nav a:hover { color: var(--ink); }

main {
  max-width: var(--width);
  margin: 0 auto;
  padding: 0 16px;
}

section { padding: 48px 0; border-bottom: 1px solid var(--line); }
section:last-child { border-bottom: 0; }

h1, h2 { line-height: 1.25; }
h1 { font-size: clamp(26px, 5vw, 38px); margin: 24px 0 12px; }
h2 { font-size: 24px; margin: 0 0 12px; }
h3 { font-size: 18px; margin: 28px 0 8px; }

.hero { text-align: center; padding-top: 56px; }
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin: 0;
  font-size: clamp(40px, 9vw, 64px);
  font-weight: 600;
  letter-spacing: -.01em;
}

.wordmark img { width: 1.5em; height: 1.5em; }
.wordmark em { color: var(--amber); font-style: normal; }
.lede { color: var(--ink-dim); font-size: 19px; max-width: 620px; margin: 0 auto; }

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 28px 0 12px;
}

.button {
  display: inline-block;
  padding: 12px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--bg-raised);
  font-weight: 600;
  text-decoration: none;
}

.button:hover { border-color: var(--ink-dim); color: var(--ink); }

.button.primary {
  border-color: transparent;
  color: #1a1206;
  background: linear-gradient(var(--amber), var(--amber-deep));
}

.button.primary:hover { filter: brightness(1.08); color: #1a1206; }

.fine { color: var(--ink-dim); font-size: 14px; }

.hash { word-break: break-all; }

.command { display: flex; align-items: stretch; gap: 8px; }
.command pre { flex: 1; margin: 0; }
.command code { user-select: all; -webkit-user-select: all; }
.button.copy { flex: none; padding: 10px 20px; cursor: pointer; font: inherit; font-weight: 600; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.steps h2 { font-size: 19px; margin: 8px 0 4px; }
.steps p { margin: 0; color: var(--ink-dim); }

.num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  color: var(--cyan);
  font-weight: 700;
  font-size: 15px;
}

ol { padding-left: 1.3em; }
ol li { margin-bottom: 10px; }
ol pre { margin: 8px 0 0; }

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 16px;
  margin: 10px 0;
  background: var(--bg-raised);
}

details > summary { cursor: pointer; padding: 12px 0; font-weight: 600; }
details[open] > summary { color: var(--amber); }
details p { margin: 0 0 14px; }

footer {
  max-width: var(--width);
  margin: 0 auto;
  padding: 32px 16px 48px;
  color: var(--ink-dim);
  font-size: 14px;
}

.imprint { padding-top: 32px; }
.imprint h1 { margin-top: 0; }
.licence { white-space: pre-wrap; font-size: 13px; line-height: 1.5; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .steps { grid-template-columns: 1fr; }
  .bar nav { gap: 14px; }
  section { padding: 36px 0; }
}