/* Broadnarrow LLP — brand guidelines site
   Two-colour system only: BN Black #000000, BN White #FFFFFF.
   Typeface: Oswald (SIL OFL 1.1), per BN-BRAND-MASTERS 3.2 */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@200;300;400;500;700&display=swap');

:root {
  --ink: #000000;
  --paper: #FFFFFF;
  --rule: rgba(0, 0, 0, 0.14);
  --muted: rgba(0, 0, 0, 0.55);
  --wash: rgba(0, 0, 0, 0.035);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #FFFFFF;
    --paper: #000000;
    --rule: rgba(255, 255, 255, 0.18);
    --muted: rgba(255, 255, 255, 0.6);
    --wash: rgba(255, 255, 255, 0.05);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Oswald', 'Arial Narrow', 'Helvetica Neue Condensed', sans-serif;
  font-weight: 300;
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: 0.01em;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 96px;
}

/* ---------- masthead ---------- */
header.mast {
  border-bottom: 1px solid var(--rule);
  margin-bottom: 48px;
  padding: 40px 0 24px;
}

.wordmark {
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1;
  letter-spacing: -0.01em;
  margin: 0;
}
.wordmark .broad  { font-weight: 500; }   /* Oswald Medium */
.wordmark .narrow { font-weight: 300; }   /* Oswald Light  */
.wordmark .tm {
  font-weight: 400;
  font-size: 0.2em;
  vertical-align: super;
  margin-left: 0.1em;
}

.mast .kicker {
  margin: 14px 0 0;
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

nav.docnav {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
nav.docnav a { color: var(--muted); text-decoration: none; border-bottom: 1px solid transparent; }
nav.docnav a:hover, nav.docnav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }

/* ---------- typography ---------- */
h1, h2, h3, h4 { font-weight: 500; line-height: 1.2; letter-spacing: 0; }
h1 { font-size: clamp(26px, 5vw, 36px); margin: 0 0 8px; }
h2 {
  font-size: clamp(20px, 3.4vw, 25px);
  margin: 56px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}
h3 { font-size: 19px; margin: 34px 0 10px; font-weight: 400; }
h4 { font-size: 16px; margin: 24px 0 8px; font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }

p { margin: 0 0 16px; }
strong { font-weight: 500; }
a { color: var(--ink); text-underline-offset: 3px; }

ul, ol { padding-left: 22px; margin: 0 0 18px; }
li { margin-bottom: 7px; }

blockquote {
  margin: 22px 0;
  padding: 14px 20px;
  border-left: 3px solid var(--ink);
  background: var(--wash);
}
blockquote p:last-child { margin-bottom: 0; }

code {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.86em;
  padding: 1px 5px;
  background: var(--wash);
  border: 1px solid var(--rule);
  border-radius: 3px;
  white-space: nowrap;
}
pre {
  background: var(--wash);
  border: 1px solid var(--rule);
  padding: 16px;
  overflow-x: auto;
  border-radius: 4px;
}
pre code { background: none; border: 0; padding: 0; white-space: pre; font-size: 13px; }

hr { border: 0; border-top: 1px solid var(--rule); margin: 44px 0; }

/* ---------- tables ---------- */
.tablewrap { overflow-x: auto; margin: 0 0 22px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { border: 1px solid var(--rule); padding: 9px 12px; text-align: left; vertical-align: top; }
th { background: var(--ink); color: var(--paper); font-weight: 500; letter-spacing: 0.04em; }
tbody tr:nth-child(even) { background: var(--wash); }

/* ---------- landing cards ---------- */
.cards { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin: 34px 0 0; }
.card {
  border: 1px solid var(--rule);
  padding: 26px 24px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: background .15s ease, border-color .15s ease;
}
.card:hover { background: var(--wash); border-color: var(--ink); }
.card h3 { margin: 0 0 8px; font-weight: 500; }
.card p { margin: 0; font-size: 15px; color: var(--muted); }
.card .tag { display: block; font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }

/* ---------- footer ---------- */
footer.foot {
  margin-top: 72px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--muted);
}

@media print {
  nav.docnav, .card:hover { display: revert; }
  body { font-size: 11pt; }
  th { background: none; color: var(--ink); border-bottom: 2px solid var(--ink); }
}