/* cpb website — one stylesheet, dark by default, light via data-theme or
   prefers-color-scheme. Terminal-native: monospace headings and snippets,
   a plain sans for prose. */

:root {
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Code",
    "Fira Code", Menlo, Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  --bg: #0b0e14;
  --bg-raised: #11151d;
  --bg-term: #080a0f;
  --fg: #e8e6e1;
  --fg-dim: #9aa0ac;
  --fg-faint: #5c6370;
  --border: #242b38;
  --accent: #7ee0c3;
  --accent-strong: #9ff0d8;
  --prompt: #7ee0c3;
  --keyword: #e0b355;
  --link: #8ab4f8;
  --danger: #e37c7c;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

:root[data-theme="light"] {
  --bg: #fbfaf7;
  --bg-raised: #f1efe9;
  --bg-term: #16181d;
  --fg: #1b1d22;
  --fg-dim: #4c525e;
  --fg-faint: #767d8a;
  --border: #ddd8cc;
  --accent: #0f7a5c;
  --accent-strong: #0a5e46;
  --prompt: #d8c073;
  --keyword: #a9671a;
  --link: #1757b0;
  --danger: #b1352f;
  --shadow: 0 8px 24px rgba(27, 29, 34, 0.08);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #fbfaf7;
    --bg-raised: #f1efe9;
    --bg-term: #16181d;
    --fg: #1b1d22;
    --fg-dim: #4c525e;
    --fg-faint: #767d8a;
    --border: #ddd8cc;
    --accent: #0f7a5c;
    --accent-strong: #0a5e46;
    --prompt: #d8c073;
    --keyword: #a9671a;
    --link: #1757b0;
    --danger: #b1352f;
    --shadow: 0 8px 24px rgba(27, 29, 34, 0.08);
  }
}

* { box-sizing: border-box; }

html {
  color-scheme: dark light;
  scroll-padding-top: 4.5rem;
}

/* Smooth scrolling only for an in-page jump (nav links), never for wheel or
   trackpad input: a global `scroll-behavior: smooth` on html fights native
   momentum scrolling and produces visible jank/blank frames under fast
   wheel input. */
html.jump-scroll {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .mono {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: -0.01em;
}

a { color: var(--link); }
a:hover { text-decoration: underline; }

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.prose {
  max-width: 720px;
}

/* ---------- header / nav ---------- */

header.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-row {
  max-width: 920px;
  margin: 0 auto;
  padding: 0.8rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  font-size: 1.05rem;
  white-space: nowrap;
}
.brand span { color: var(--accent); }

nav.site-nav {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  flex: 1;
  scrollbar-width: none;
}
nav.site-nav::-webkit-scrollbar { display: none; }

nav.site-nav a {
  color: var(--fg-dim);
  text-decoration: none;
  font-size: 0.88rem;
  white-space: nowrap;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}
nav.site-nav a:hover,
nav.site-nav a.active {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

button.theme-toggle {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 6px;
  width: 2.1rem;
  height: 2.1rem;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
button.theme-toggle:hover { border-color: var(--accent); }

.gh-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--fg-dim);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
}
.gh-link:hover { color: var(--fg); border-color: var(--accent); text-decoration: none; }

/* ---------- hero ---------- */

.hero {
  padding: 4rem 0 2.5rem;
}

.hero .ci-badge { margin-bottom: 1rem; display: inline-block; }
.hero .ci-badge img { display: block; height: 20px; }

.hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.25;
  margin: 0 0 1rem;
}
.hero h1 .k { color: var(--accent); }

.hero p.lede {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  color: var(--fg-dim);
  max-width: 640px;
  margin: 0 0 2rem;
}

/* ---------- section scaffolding ---------- */

section { padding: 3rem 0; border-top: 1px solid var(--border); }
section:first-of-type { border-top: none; }

section > h2 {
  font-size: 1.4rem;
  margin: 0 0 0.4rem;
}
section > p.section-lede {
  color: var(--fg-dim);
  max-width: 680px;
  margin: 0 0 1.75rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

/* ---------- isolation layer cards ---------- */

.layer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 1.5rem 0 0;
}
@media (max-width: 640px) {
  .layer-grid { grid-template-columns: 1fr; }
}

.layer-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.2rem;
}
.layer-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--accent-strong);
}
.layer-card p { margin: 0 0 0.6rem; color: var(--fg-dim); font-size: 0.94rem; }
.layer-card code.kw {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--keyword);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
}

/* ---------- terminal / snippet blocks ---------- */

.term {
  background: var(--bg-term);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  overflow: hidden;
  margin: 1.25rem 0;
}

.term-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.8rem;
  background: color-mix(in srgb, var(--bg-term) 85%, white 4%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.term-dots { display: flex; gap: 0.4rem; }
.term-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: #4a4f5a;
}
.term-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: #8a8f99;
}
.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  background: transparent;
  color: #9aa0ac;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 5px;
  padding: 0.22rem 0.55rem;
  cursor: pointer;
}
.copy-btn:hover { color: #fff; border-color: var(--accent); }
.copy-btn.copied { color: var(--accent); border-color: var(--accent); }

.term pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.55;
  color: #d6dae3;
}
.term .cmd { color: #f2f3f5; }
.term .cmd .prompt { color: var(--prompt); }
.term .out { color: #9099a8; }
.term .comment { color: #666e7d; font-style: italic; }

.verified-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  margin-top: 0.5rem;
}
.verified-tag::before { content: "✓"; }

/* ---------- tui golden blocks ---------- */

.tui-block pre {
  font-size: 0.78rem;
  line-height: 1.4;
  white-space: pre;
}

/* ---------- built-to-be-relied-on ---------- */

.reliability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (max-width: 720px) {
  .reliability-grid { grid-template-columns: 1fr; }
}
.reliability-grid .stat {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
}
.reliability-grid .stat .n {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent-strong);
  display: block;
}
.reliability-grid .stat .d { color: var(--fg-dim); font-size: 0.88rem; }

/* ---------- install ---------- */

.install-row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 3rem;
  color: var(--fg-faint);
  font-size: 0.86rem;
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
footer nav { display: flex; gap: 1.1rem; }
footer a { color: var(--fg-dim); text-decoration: none; }
footer a:hover { color: var(--fg); text-decoration: underline; }

/* ---------- misc ---------- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #06120d;
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }

::selection { background: var(--accent); color: #06120d; }

code.inline {
  font-family: var(--font-mono);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  font-size: 0.9em;
}