/* Breakthrough Data — landing page
   Hi-fi recreation of design_handoff_breakthrough_landing/Breakthrough Data.dc.html
   Colors, type, spacing and copy taken verbatim from the design handoff. */

:root {
  --paper: #f6f3ec;
  --ink: #211d18;
  --body: #5c5346;
  --muted: #8a8071;
  --placeholder: #a89e8d;
  --hairline: #e3ddd0;
  --field-border: #d8d1c2;
  --hover-bg: #efe9dd;

  --dark-text: #f0ece3;
  --dark-body: #b6ad9d;
  --dark-hairline: #3a342b;
  --dark-muted: #8f8676;

  --accent: oklch(0.55 0.12 40);
  --accent-link: oklch(0.48 0.12 40);
  --accent-link-hover: oklch(0.4 0.13 40);
  --accent-dark: oklch(0.68 0.12 45);
  --eyebrow: oklch(0.5 0.12 40);

  --serif: 'Newsreader', Georgia, serif;
  --sans: 'Libre Franklin', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
a.bd-link { color: var(--accent-link); }
a.bd-link:hover { color: var(--accent-link-hover); }

input, textarea, button { font: inherit; color: inherit; }
input:focus, textarea:focus { outline: none; }
::placeholder { color: var(--placeholder); }

img { display: block; }

.bd-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Shared type ------------------------------------------------------------- */
.bd-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--eyebrow);
  margin: 0 0 28px;
}
.bd-eyebrow--dark { color: var(--accent-dark); margin-bottom: 20px; }

.bd-h2 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
}

.bd-btn {
  transition: transform .15s ease, background .15s ease;
}
.bd-btn:hover { transform: translateY(-1px); }

/* NAV --------------------------------------------------------------------- */
.bd-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 243, 236, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.bd-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 22px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.bd-wordmark {
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.bd-nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
  font-size: 14px;
  color: var(--body);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.bd-nav__enquire {
  border-bottom: 1.5px solid var(--accent);
  padding-bottom: 2px;
  font-weight: 600;
}

/* HERO -------------------------------------------------------------------- */
.bd-hero { border-bottom: 1px solid var(--hairline); }
.bd-hero__inner {
  padding: 104px 48px 84px;
  text-align: center;
}
.bd-hero__h1 {
  font-family: var(--serif);
  font-size: 76px;
  line-height: 1.0;
  letter-spacing: -0.02em;
  font-weight: 500;
  margin: 0 auto 28px;
  max-width: 880px;
}
.bd-hero__sub {
  font-size: 20px;
  line-height: 1.65;
  color: var(--body);
  margin: 0 auto 40px;
  max-width: 620px;
}
.bd-hero__cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}
.bd-btn {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  padding: 17px 36px;
  border: none;
  border-radius: 2px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  cursor: pointer;
}
.bd-textlink {
  font-size: 15px;
  color: var(--body);
  font-weight: 500;
}

/* COVERAGE ---------------------------------------------------------------- */
.bd-coverage { border-bottom: 1px solid var(--hairline); }
.bd-coverage__head {
  padding: 40px 48px 8px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
}
.bd-h2--sm { font-size: 30px; }
.bd-note {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
}
.bd-coverage__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 24px 48px 44px;
}
.bd-plat {
  padding: 26px 22px;
  border-top: 1px solid var(--hairline);
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: background .15s ease;
}
.bd-plat:hover { background: var(--hover-bg); }
.bd-plat__fav {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  flex-shrink: 0;
}

/* DELIVERY (dark band) ---------------------------------------------------- */
.bd-delivery {
  border-bottom: 1px solid var(--hairline);
  background: var(--ink);
  color: var(--dark-text);
}
.bd-delivery .bd-container { padding: 80px 48px; }
.bd-delivery__h2 {
  font-size: 42px;
  letter-spacing: -0.02em;
  margin: 0 0 48px;
  max-width: 640px;
}
.bd-delivery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--dark-hairline);
  border: 1px solid var(--dark-hairline);
}
.bd-fmt {
  background: var(--ink);
  padding: 34px 30px;
}
.bd-fmt__k {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent-dark);
  margin-bottom: 16px;
}
.bd-fmt__t {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 500;
  margin: 0 0 10px;
}
.bd-fmt__d {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--dark-body);
  margin: 0;
}
.bd-delivery__foot {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--dark-muted);
  margin: 26px 0 0;
}

/* APPROACH ---------------------------------------------------------------- */
.bd-approach { border-bottom: 1px solid var(--hairline); }
.bd-approach__inner {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
  padding: 84px 48px;
  align-items: start;
}
.bd-approach__aside {
  position: sticky;
  top: 110px;
}
.bd-approach__aside .bd-eyebrow { margin-bottom: 18px; }
.bd-approach__h2 {
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
.bd-approach__body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--body);
  margin: 0;
}
.bd-steps { display: flex; flex-direction: column; }
.bd-step {
  display: flex;
  gap: 28px;
  border-bottom: 1px solid var(--hairline);
  padding: 0 0 32px;
  margin-bottom: 32px;
}
.bd-step__n {
  font-family: var(--serif);
  font-size: 34px;
  color: var(--accent);
  line-height: 1;
  flex-shrink: 0;
}
.bd-step__t {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 8px;
}
.bd-step__d {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin: 0;
}

/* WHO --------------------------------------------------------------------- */
.bd-who { border-bottom: 1px solid var(--hairline); }
.bd-who .bd-container { padding: 80px 48px; }
.bd-who__h2 {
  font-size: 40px;
  letter-spacing: -0.02em;
  margin: 0 0 44px;
  max-width: 640px;
}
.bd-who__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 64px;
}
.bd-aud {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid var(--hairline);
}
.bd-aud__n {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  padding-top: 4px;
}
.bd-aud__t {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  margin: 0 0 6px;
}
.bd-aud__d {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--body);
  margin: 0;
}

/* ENQUIRE ----------------------------------------------------------------- */
.bd-enquire__inner {
  padding: 88px 48px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: start;
}
.bd-enquire__aside {
  position: sticky;
  top: 110px;
}
.bd-enquire__h2 {
  font-family: var(--serif);
  font-size: 48px;
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 500;
  margin: 0 0 20px;
}
.bd-enquire__body {
  font-size: 17px;
  line-height: 1.65;
  color: var(--body);
  margin: 0 0 28px;
}
.bd-enquire__contact {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--body);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Form -------------------------------------------------------------------- */
.bd-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 28px;
}
.bd-field {
  border-bottom: 1px solid var(--field-border);
  padding: 16px 0;
  display: block;
}
.bd-field--brief { margin-bottom: 28px; }
.bd-field__label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 8px;
}
.bd-field input,
.bd-field textarea {
  width: 100%;
  border: none;
  background: transparent;
  font-size: 16px;
}
.bd-field textarea {
  resize: vertical;
  line-height: 1.5;
}
.bd-field .bd-field__label + input,
.bd-field .bd-field__label + textarea { margin-top: 0; }

/* Platform chips */
.bd-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 4px;
}
.bd-chip {
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
  border: 1px solid var(--field-border);
  background: transparent;
  color: var(--dark-hairline);
  border-radius: 999px;
  padding: 7px 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.bd-chip:hover { transform: translateY(-1px); }
.bd-chip__fav { width: 16px; height: 16px; border-radius: 4px; }
.bd-chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.bd-form__submit { margin-top: 0; }
.bd-form__submit[disabled] { opacity: .6; cursor: default; transform: none; }
.bd-form__error {
  font-size: 14px;
  color: var(--accent-link);
  margin: 0 0 18px;
}

/* Honeypot — visually hidden, still in the tab-less DOM for bots. */
.bd-hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Thank-you confirmation */
.bd-thanks {
  border-top: 2px solid var(--ink);
  padding-top: 38px;
}
.bd-thanks .bd-eyebrow { margin-bottom: 18px; letter-spacing: 0.12em; color: var(--eyebrow); }
.bd-thanks__h3 {
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 500;
  margin: 0 0 14px;
}
.bd-thanks__body {
  font-size: 17px;
  line-height: 1.65;
  color: var(--body);
  margin: 0;
  max-width: 440px;
}

/* FOOTER ------------------------------------------------------------------ */
.bd-footer {
  border-top: 1px solid var(--hairline);
  background: var(--ink);
  color: var(--dark-body);
}
.bd-footer__inner {
  padding: 40px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.bd-footer__mark {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--dark-text);
}
.bd-footer__meta {
  font-family: var(--mono);
  font-size: 13px;
}

/* RESPONSIVE -------------------------------------------------------------- */
@media (max-width: 900px) {
  .bd-nav__inner { padding: 18px 28px; }
  .bd-nav__links { gap: 22px; font-size: 13px; }

  .bd-hero__inner { padding: 72px 28px 60px; }
  .bd-hero__h1 { font-size: 52px; }
  .bd-hero__sub { font-size: 18px; }

  .bd-coverage__head { padding: 32px 28px 4px; }
  .bd-coverage__grid { grid-template-columns: repeat(2, 1fr); padding: 20px 28px 32px; }

  .bd-delivery .bd-container { padding: 64px 28px; }
  .bd-delivery__h2 { font-size: 34px; }
  .bd-delivery__grid { grid-template-columns: 1fr; }

  .bd-approach__inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 64px 28px;
  }
  .bd-approach__aside { position: static; top: auto; }
  .bd-approach__h2 { font-size: 34px; }

  .bd-who .bd-container { padding: 64px 28px; }
  .bd-who__grid { grid-template-columns: 1fr; gap: 0; }
  .bd-who__h2 { font-size: 34px; }

  .bd-enquire__inner {
    grid-template-columns: 1fr;
    gap: 44px;
    padding: 64px 28px;
  }
  .bd-enquire__aside { position: static; top: auto; }
  .bd-enquire__h2 { font-size: 40px; }

  .bd-footer__inner { padding: 32px 28px; }
}

@media (max-width: 560px) {
  .bd-nav__links { gap: 16px; }
  .bd-nav__links a:not(.bd-nav__enquire) { display: none; }

  .bd-hero__h1 { font-size: 40px; }
  .bd-hero__cta { flex-direction: column; align-items: stretch; }
  .bd-btn { text-align: center; }

  .bd-coverage__grid { grid-template-columns: 1fr; }

  .bd-form__row { grid-template-columns: 1fr; gap: 0; }

  .bd-enquire__h2 { font-size: 34px; }
  .bd-enquire__h2 br { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bd-btn, .bd-chip, .bd-plat { transition: none; }
  .bd-btn:hover, .bd-chip:hover { transform: none; }
}