/* =============================================================
   Backbench website — shared layout & navigation
   Loads colors_and_type.css for tokens.
   ============================================================= */

@import url("colors_and_type.css");

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bb-bg);
  color: var(--bb-ink);
  font-family: var(--bb-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

img { display: block; max-width: 100%; }

/* ---- Page shell ---- */
.site {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 64px;
}

/* ============================================================
   GLOBAL NAV
   ============================================================ */
.nav {
  border-bottom: 1px solid var(--bb-rule);
  padding-top: 24px;
  padding-bottom: 22px;
}
.nav-row {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 64px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 36px;
}
.nav .mk {
  font-family: var(--bb-serif);
  font-weight: 600;
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.020em;
  color: var(--bb-ink);
  font-variation-settings: "opsz" 34;
}
.nav-items {
  display: flex;
  gap: 28px;
  justify-content: center;
}
.nav-items a {
  font-family: var(--bb-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--bb-ink-soft);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition:
    color var(--bb-dur-2) var(--bb-ease),
    border-color var(--bb-dur-2) var(--bb-ease);
}
.nav-items a:hover { color: var(--bb-ink); }
.nav-items a.is-here { color: var(--bb-ink); border-bottom-color: var(--bb-ink); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--bb-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bb-ink);
  border: 1px solid var(--bb-ink);
  padding: 10px 16px;
  transition: background var(--bb-dur-2) var(--bb-ease), color var(--bb-dur-2) var(--bb-ease);
}
.nav-cta:hover { background: var(--bb-ink); color: var(--bb-bg); }
.nav-cta .arrow {
  font-family: var(--bb-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 14px;
  line-height: 1;
}

/* ============================================================
   FOOTER
   ============================================================ */
.foot {
  background: var(--bb-ink);
  color: var(--bb-on-ink);
  margin-top: 96px;
  padding: 64px 0 28px;
}
.foot-row {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 64px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--bb-on-ink-rule);
}
.foot .mk {
  font-family: var(--bb-serif);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.020em;
  color: var(--bb-on-ink);
  line-height: 1;
  margin-bottom: 16px;
  font-variation-settings: "opsz" 24;
}
.foot .tag {
  font-family: var(--bb-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.4;
  color: var(--bb-on-ink-soft);
  max-width: 28ch;
}
.foot-col h4 {
  margin: 0 0 18px;
  font-family: var(--bb-sans);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: var(--bb-ls-widest);
  text-transform: uppercase;
  color: var(--bb-on-ink-soft);
}
.foot-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.foot-col a {
  font-family: var(--bb-sans);
  font-size: 14px;
  color: var(--bb-on-ink);
  border-bottom: 1px solid transparent;
  transition: border-color var(--bb-dur-2) var(--bb-ease);
}
.foot-col a:hover { border-bottom-color: var(--bb-on-ink); }
.foot-col p {
  margin: 0;
  font-family: var(--bb-sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--bb-on-ink-soft);
}
.foot-col p strong { color: var(--bb-on-ink); font-weight: 500; }
.foot-meta {
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--bb-sans);
  font-size: 11px;
  letter-spacing: var(--bb-ls-wide);
  text-transform: uppercase;
  color: var(--bb-on-ink-soft);
}
.foot-meta strong { color: var(--bb-on-ink); font-weight: 500; }

/* ============================================================
   SECTION CHROME — eyebrow, rule, roman numeral
   ============================================================ */
.section {
  padding-top: 80px;
  padding-bottom: 16px;
}
.section-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
.section-head .eyebrow {
  font-family: var(--bb-sans);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: var(--bb-ls-widest);
  text-transform: uppercase;
  color: var(--bb-ink-soft);
}
.section-head .ln { height: 1px; background: var(--bb-rule); }
.section-head .num {
  font-family: var(--bb-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 15px;
  color: var(--bb-ink-soft);
}

/* ============================================================
   BUTTONS — page-level (preview/buttons.html parity)
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--bb-accent);
  color: var(--bb-bg);
  font-family: var(--bb-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 0;
  border-radius: 2px;
  cursor: pointer;
  transition: background var(--bb-dur-2) var(--bb-ease);
}
.btn:hover { background: var(--bb-accent-deep); }
.btn .arrow {
  font-family: var(--bb-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 16px;
  line-height: 1;
}
.btn-2 {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  background: transparent;
  color: var(--bb-ink);
  font-family: var(--bb-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--bb-ink);
  border-radius: 2px;
  cursor: pointer;
}
.btn-2:hover { background: var(--bb-ink); color: var(--bb-bg); }

/* Body links: ink with hairline underline — accent only on hover.
   (Per locked rationing: accent reserved for CTAs + key data.) */
.body-link {
  color: var(--bb-ink);
  border-bottom: 1px solid var(--bb-ink);
  padding-bottom: 1px;
  transition: color var(--bb-dur-2) var(--bb-ease), border-color var(--bb-dur-2) var(--bb-ease);
}
.body-link:hover {
  color: var(--bb-accent);
  border-bottom-color: var(--bb-accent);
}
/* ============================================================
   MOBILE NAV — hamburger toggle + slide-down panel
   Hidden above 880px (the responsive breakpoint).
   ============================================================ */
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 8px;
  cursor: pointer;
  width: 36px;
  height: 36px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
}
.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--bb-ink);
  transition:
    transform var(--bb-dur-2) var(--bb-ease),
    opacity var(--bb-dur-2) var(--bb-ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-mobile { display: none; border-top: 1px solid var(--bb-rule); }
.nav-mobile[hidden] { display: none; }
.nav-mobile a {
  display: block;
  padding: 18px 24px;
  font-family: var(--bb-sans);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--bb-ink);
  border-bottom: 1px solid var(--bb-rule);
}
.nav-mobile a:hover { background: var(--bb-surface); }
.nav-mobile a.nav-mobile-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 16px 24px 20px;
  padding: 14px 22px;
  background: var(--bb-accent);
  color: var(--bb-bg);
  border: 0;
  border-bottom: 0;
  border-radius: 2px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav-mobile a.nav-mobile-cta:hover { background: var(--bb-accent-deep); }
.nav-mobile a.nav-mobile-cta .arrow {
  font-family: var(--bb-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 16px;
}

/* ============================================================
   RESPONSIVE — mobile (base)
   Scale unchanged; padding tightened.
   ============================================================ */
@media (max-width: 880px) {
  .site, .nav-row, .foot-row { padding-left: 24px; padding-right: 24px; }

  .nav { padding-top: 14px; padding-bottom: 12px; }
  .nav-row { grid-template-columns: 1fr auto; gap: 16px; }
  .nav-items { display: none; }
  .nav-cta { display: none; }        /* CTA moves into the mobile panel */
  .nav-toggle { display: inline-flex; }
  .nav-mobile { display: block; }     /* container shown; [hidden] attr controls visibility */

  .foot { padding: 48px 0 24px; margin-top: 56px; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* ============================================================
   PAGE HERO — shared across detail pages
   ============================================================ */
.page-hero {
  padding-top: 88px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--bb-rule);
}
.page-hero .eyebrow {
  font-family: var(--bb-sans);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: var(--bb-ls-widest);
  text-transform: uppercase;
  color: var(--bb-ink-soft);
  margin-bottom: 24px;
}
.page-hero h1 {
  margin: 0;
  font-family: var(--bb-serif);
  font-weight: 500;
  /* v1.6 — locked spec restored; defensive sizing (v1.5.2) reverted
     now that Freight Medium 500 is loading via the Adobe Fonts kit. */
  font-size: clamp(48px, 6.4vw, 88px);
  line-height: 1;
  letter-spacing: -0.022em;
  color: var(--bb-ink);
  font-variation-settings: "opsz" 60;
  max-width: 18ch;
}
.page-hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--bb-ink-line);
}
.page-hero .lede {
  margin: 28px 0 0;
  font-family: var(--bb-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.5;
  color: var(--bb-ink-soft);
  max-width: 44ch;
  font-variation-settings: "opsz" 24;
}

/* Detail-page first-section override — page hero already provides headroom */
.page-hero + .section { padding-top: 64px; }

/* PROSE — content blocks */
.prose h2 {
  margin: 0 0 16px;
  font-family: var(--bb-serif);
  font-weight: 500;
  font-size: clamp(32px, 3.6vw, 48px);
  line-height: 1.06;
  letter-spacing: -0.018em;
  color: var(--bb-ink);
  font-variation-settings: "opsz" 44;
  max-width: 18ch;
}
.prose h2 em { font-style: italic; font-weight: 400; color: var(--bb-ink-soft); }
.prose h3 {
  margin: 0 0 10px;
  font-family: var(--bb-serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--bb-ink);
  font-variation-settings: "opsz" 24;
}
.prose p {
  margin: 0 0 16px;
  font-family: var(--bb-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.65;
  color: var(--bb-ink-line);
  max-width: 64ch;
}
.prose p:last-child { margin-bottom: 0; }
.prose .lede-i {
  font-family: var(--bb-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 19px;
  line-height: 1.5;
  color: var(--bb-ink-soft);
  max-width: 50ch;
  font-variation-settings: "opsz" 22;
}

/* Split layout — h2 left, prose right */
.split {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
}

/* Data table */
.dt {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--bb-sans);
}
.dt thead th {
  text-align: left;
  font-size: 10px;
  letter-spacing: var(--bb-ls-widest);
  text-transform: uppercase;
  color: var(--bb-ink-soft);
  font-weight: 500;
  padding: 12px 16px 12px 0;
  border-bottom: 1px solid var(--bb-rule);
  border-top: 1px solid var(--bb-rule);
}
.dt thead th:last-child, .dt tbody td:last-child { padding-right: 0; }
.dt tbody td {
  font-size: 14px;
  color: var(--bb-ink-line);
  padding: 16px 16px 16px 0;
  border-bottom: 1px solid var(--bb-rule);
  vertical-align: baseline;
}
.dt tbody td .ttl {
  font-family: var(--bb-serif);
  font-weight: 500;
  color: var(--bb-ink);
  font-size: 16px;
  letter-spacing: -0.005em;
  display: block;
  margin-bottom: 4px;
  font-variation-settings: "opsz" 18;
}
.dt tbody td.num {
  font-family: var(--bb-serif);
  font-weight: 500;
  text-align: right;
  font-feature-settings: "tnum" 1;
  color: var(--bb-ink);
}

/* Numbered list of details */
.detail-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--bb-rule);
}
.detail-item {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--bb-rule);
  align-items: baseline;
}
.detail-item .n {
  font-family: var(--bb-serif);
  font-weight: 500;
  font-size: 32px;
  color: var(--bb-ink);
  line-height: 1;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.018em;
  font-variation-settings: "opsz" 32;
}
.detail-item .head h3 {
  margin: 0 0 8px;
  font-family: var(--bb-serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--bb-ink);
  font-variation-settings: "opsz" 24;
}
.detail-item .head .meta {
  font-family: var(--bb-sans);
  font-size: 11.5px;
  letter-spacing: var(--bb-ls-wide);
  text-transform: uppercase;
  color: var(--bb-ink-soft);
}
.detail-item .body {
  font-family: var(--bb-sans);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--bb-ink-line);
}
.detail-item .body strong { color: var(--bb-ink); font-weight: 500; }

/* CTA STRIP — same as homepage, reusable on every page */
.cta-strip {
  margin-top: 96px;
  padding: 64px;
  background: var(--bb-ink);
  color: var(--bb-on-ink);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: end;
}
.cta-strip h3 {
  margin: 0;
  font-family: var(--bb-serif);
  font-weight: 500;
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.022em;
  color: var(--bb-on-ink);
  max-width: 14ch;
  font-variation-settings: "opsz" 52;
}
.cta-strip h3 em {
  font-style: italic;
  color: #d09583;   /* accent: tagline-second-line treatment, surface = CTA strip */
  font-weight: 400;
}
.cta-strip .body {
  font-family: var(--bb-serif);
  font-style: italic;
  font-size: 18px;
  color: var(--bb-on-ink-soft);
  line-height: 1.45;
  max-width: 36ch;
  margin: 0 0 28px;
}
.cta-strip .btn {
  background: var(--bb-accent);
  color: var(--bb-bg);
}
.cta-strip .btn:hover { background: var(--bb-accent-deep); }
.cta-strip .terms {
  font-family: var(--bb-sans);
  font-size: 11.5px;
  letter-spacing: var(--bb-ls-wide);
  text-transform: uppercase;
  color: var(--bb-on-ink-soft);
  margin-top: 14px;
}
.cta-strip .terms strong { color: var(--bb-on-ink); font-weight: 500; }

@media (max-width: 880px) {
  .page-hero { padding-top: 48px; padding-bottom: 40px; }
  .section { padding-top: 48px; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .detail-item { grid-template-columns: 56px 1fr; gap: 16px; }
  .detail-item .body { grid-column: 1 / -1; padding-top: 4px; }
  .cta-strip { padding: 36px 28px; grid-template-columns: 1fr; gap: 24px; margin-top: 56px; }
}