/* Field Tested — design system v1 (see knowledge-base/assets/A-design-system-field-tested.md)
   2026-07-02: fonts self-hosted (variable woff2, latin) — faster LCP, no third-party font CDN. */

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/fonts/inter-var-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('/fonts/jetbrains-mono-var-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --bg: #FAFAF9;
  --surface: #FFFFFF;
  --ink: #18181B;
  --ink-2: #52525B;
  --ink-3: #71717A;  /* AA on bg for small text; decorative-only lighter gray below */
  --ink-4: #A1A1AA;
  --border: #E7E5E4;
  --accent: #FF4A00;
  --accent-ink: #C63A00;
  --accent-soft: #FFF1EA;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px -12px rgba(0,0,0,.12);
  --dur-1: 160ms;
  --dur-2: 320ms;
  --dur-3: 700ms;
  --ease: cubic-bezier(.22,1,.36,1);
  --font-text: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
}

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

/* accessibility: skip link — kept for screen readers, NEVER shown on screen
   (principal pref 2026-07-02: the on-focus reveal read as out-of-place in the nav).
   Screen readers still announce/activate it; no visual reveal for mouse or keyboard. */
.skip {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
}
@media (max-width: 640px) { body { font-size: 15px; } }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }

/* ————— header ————— */
header.site {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand {
  font-weight: 700; font-size: 15px; letter-spacing: -0.02em;
  color: var(--ink); text-decoration: none;
  display: flex; align-items: center; gap: 9px;
}
.brand .tick {
  width: 10px; height: 10px; border-radius: 2px;
  background: var(--accent);
  transition: transform var(--dur-2) var(--ease);
}
.brand:hover .tick { transform: rotate(45deg); }
nav.site a {
  color: var(--ink-2); text-decoration: none; font-size: 14px; font-weight: 500;
  margin-left: 22px; position: relative;
}
nav.site a::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: -3px; height: 1.5px;
  background: var(--accent);
  transition: right var(--dur-2) var(--ease);
}
nav.site a:hover { color: var(--ink); }
nav.site a:hover::after { right: 0; }

/* ————— type ————— */
h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.025em; font-weight: 700; margin: 0 0 12px; }
h2 { font-size: 22px; line-height: 1.25; letter-spacing: -0.02em; font-weight: 600; margin: 44px 0 10px; }
h3 { font-size: 17px; font-weight: 600; margin: 28px 0 6px; }
p, li { color: var(--ink-2); }
strong { color: var(--ink); font-weight: 600; }
a { color: var(--accent-ink); text-decoration: none; background-image: linear-gradient(var(--accent-ink), var(--accent-ink)); background-size: 0% 1px; background-position: 0 100%; background-repeat: no-repeat; transition: background-size var(--dur-2) var(--ease); }
a:hover { background-size: 100% 1px; }
.kicker {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .08em; color: var(--accent-ink);
  margin: 0 0 10px;
}
.meta { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-3); }
main { padding: 56px 0 32px; }

/* ————— entrance delight (hidden ONLY when JS is present — no-JS gets full content) ————— */
html.js .reveal { opacity: 0; transform: translateY(12px); }
html.js .reveal.in { opacity: 1; transform: none; transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease); }
@media (prefers-reduced-motion: reduce) { html.js .reveal { opacity: 1; transform: none; } }

/* ————— direct answer block ————— */
.answer {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 16px 20px; margin: 24px 0;
}
.answer p { margin: 0; color: var(--ink); font-size: 16.5px; }

/* ————— data tables ————— */
.tablewrap { overflow-x: auto; margin: 20px 0; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow); }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th {
  text-align: left; font-family: var(--font-mono); font-size: 11.5px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .07em; color: var(--ink-3);
  padding: 12px 16px; border-bottom: 1px solid var(--border);
}
td { padding: 13px 16px; border-bottom: 1px solid var(--border); vertical-align: top; color: var(--ink-2); position: relative; }
tr:last-child td { border-bottom: none; }
tbody tr { transition: background var(--dur-1) var(--ease); }
tbody tr:hover { background: #FCFCFB; }
tbody tr td:first-child::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--accent); transform: scaleY(0);
  transition: transform var(--dur-2) var(--ease);
}
tbody tr:hover td:first-child::before { transform: scaleY(1); }
td .yes { color: #15803D; font-weight: 600; }
td .cond { color: var(--accent-ink); font-weight: 600; }
td .no { color: #B91C1C; font-weight: 600; }
td .num, .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ————— quotes / evidence ————— */
blockquote {
  margin: 16px 0; padding: 14px 18px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--ink-2); font-size: 15px;
}
blockquote .meta { display: block; margin-top: 8px; }

/* ————— disclosure blocks ————— */
.disclosure {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--accent-soft); border: 1px solid #FFD9C7;
  border-radius: var(--radius); padding: 14px 16px; margin: 20px 0;
  font-size: 14px; color: #7C2D12;
}
.disclosure b { font-weight: 600; }
.disclosure .dot { flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); margin-top: 7px; }

/* ————— stat highlight ————— */
.stat {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  color: var(--ink); background: var(--accent-soft); border-radius: 4px; padding: 1px 6px;
  font-size: 0.92em;
}

/* ————— metric cards (/now) ————— */
.metrics { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin: 28px 0; }
.metric {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 18px; box-shadow: var(--shadow);
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);
}
.metric:hover { transform: translateY(-2px); box-shadow: 0 2px 4px rgba(0,0,0,.04), 0 16px 32px -12px rgba(0,0,0,.16); }
.metric .label { font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-3); }
.metric .value { font-family: var(--font-mono); font-size: 34px; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; margin-top: 6px; }
.metric .target { font-size: 12.5px; color: var(--ink-3); margin-top: 4px; }

.live { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-2); }
.live .pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); animation: pulse 2.4s var(--ease) infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(255,74,0,.35);} 50% { box-shadow: 0 0 0 6px rgba(255,74,0,0);} }

/* ————— log entries ————— */
.entry { border-bottom: 1px solid var(--border); padding: 20px 0; }
.entry:last-child { border-bottom: none; }
.entry .tag {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500; text-transform: uppercase;
  letter-spacing: .07em; color: var(--accent-ink); background: var(--accent-soft);
  border-radius: 4px; padding: 2px 7px; margin-left: 8px;
}
.entry p { margin: 8px 0 0; font-size: 15px; }

/* ————— cards / index lists ————— */
.card {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px 22px; margin: 14px 0;
  color: inherit; background-image: none; box-shadow: var(--shadow);
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}
.card:hover { transform: translateY(-2px); border-color: #D6D3D1; box-shadow: 0 2px 4px rgba(0,0,0,.04), 0 16px 32px -12px rgba(0,0,0,.16); }
.card h3 { margin: 0 0 6px; }
.card .arrow { color: var(--accent-ink); font-weight: 600; font-size: 14px; display: inline-block; transition: transform var(--dur-2) var(--ease); }
.card:hover .arrow { transform: translateX(3px); }
.card p { margin: 0 0 10px; font-size: 14.5px; }

/* ————— CTA ————— */
.cta {
  display: inline-block; background: var(--accent); color: #fff; font-weight: 600; font-size: 15px;
  border-radius: var(--radius); padding: 11px 20px; background-image: none;
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), background-color var(--dur-2) var(--ease);
}
.cta:hover { transform: translateY(-1px); box-shadow: 0 8px 20px -8px rgba(255,74,0,.55); background-color: #E84300; }

/* ————— footer ————— */
footer.site { border-top: 1px solid var(--border); margin-top: 64px; padding: 32px 0 48px; font-size: 13.5px; color: var(--ink-3); }
footer.site p { color: var(--ink-3); margin: 6px 0; }

/* ————— small screens ————— */
@media (max-width: 480px) {
  header.site .wrap { height: auto; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; gap: 6px; }
  nav.site a { margin-left: 0; margin-right: 16px; font-size: 13px; }
  h1 { font-size: 27px; }
}

/* ————— subscribe form ————— */
form.subscribe { margin: 20px 0; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
form.subscribe input[type=email] {
  flex: 1 1 220px; font: inherit; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--surface); color: var(--ink);
  transition: border-color var(--dur-1) var(--ease), box-shadow var(--dur-1) var(--ease);
}
form.subscribe input[type=email]:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255,74,0,.15); }
form.subscribe .cta { border: 0; cursor: pointer; font-family: inherit; }
form.subscribe .meta { flex-basis: 100%; margin: 2px 0 0; }
form.subscribe.done input, form.subscribe.done .cta { display: none; }
form.subscribe .thanks { display: none; color: var(--ink); font-weight: 600; }
form.subscribe.done .thanks { display: block; }