/* ── Shared doc-page styles ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --deep:    #04223F;
  --harbour: #062F58;
  --blue:    #2A6DB0;
  --pale:    #C7DDF3;
  --green:   #3DDC84;
  --mango:   #EF9F27;
  --body:    #F0F6FC;
  --rule:    rgba(160,200,240,.20);
  --sans:    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono:    ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--deep);
  color: var(--body);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ── Top nav ──────────────────────────────────────────────────────────────── */
.doc-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(4,34,63,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.doc-nav-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.doc-nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--body);
  font-weight: 600;
  font-size: 15px;
}
.doc-nav-brand svg { flex-shrink: 0; }
.doc-nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13.5px;
}
.doc-nav-links a {
  color: var(--pale);
  text-decoration: none;
  opacity: .75;
  transition: opacity .15s;
}
.doc-nav-links a:hover { opacity: 1; color: var(--body); }
.doc-nav-links a.active { opacity: 1; color: var(--mango); }

/* ── Page shell ───────────────────────────────────────────────────────────── */
.doc-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Page header ──────────────────────────────────────────────────────────── */
.doc-header {
  padding: 52px 0 40px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 52px;
}
.doc-eyebrow {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--mango);
  margin-bottom: 14px;
}
.doc-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  text-wrap: balance;
  margin-bottom: 16px;
}
.doc-lead {
  font-size: 18px;
  color: var(--pale);
  line-height: 1.65;
  max-width: 600px;
}

/* ── Sections ─────────────────────────────────────────────────────────────── */
.doc-section {
  margin-bottom: 52px;
}
.doc-section + .doc-section {
  border-top: 1px solid var(--rule);
  padding-top: 48px;
}
.doc-section-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mango);
  margin-bottom: 10px;
}
.doc-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  text-wrap: balance;
}
.doc-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--body);
  margin: 28px 0 10px;
}
.doc-section p {
  color: var(--body);
  margin-bottom: 14px;
}
.doc-section p:last-child { margin-bottom: 0; }

/* ── Key term highlight ──────────────────────────────────────────────────── */
.term {
  color: var(--mango);
  font-weight: 600;
}
.term-green {
  color: var(--green);
  font-weight: 600;
}

/* ── Callout boxes ────────────────────────────────────────────────────────── */
.callout {
  background: var(--harbour);
  border-left: 3px solid var(--mango);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 22px 0;
  font-size: 15.5px;
  color: var(--pale);
}
.callout.green { border-color: var(--green); }
.callout strong { color: #fff; }

/* ── Numbered steps ──────────────────────────────────────────────────────── */
.steps { list-style: none; display: flex; flex-direction: column; gap: 0; }
.steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
}
.steps li:first-child { border-top: 1px solid var(--rule); }
.step-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--mango);
  font-weight: 700;
  padding-top: 2px;
}
.step-body h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 5px;
}
.step-body p { font-size: 15.5px; margin-bottom: 0; }

/* ── Feature rows ─────────────────────────────────────────────────────────── */
.feature-list { display: flex; flex-direction: column; gap: 0; }
.feature-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 12px 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15.5px;
}
.feature-row:first-child { border-top: 1px solid var(--rule); }
.feature-name {
  color: var(--mango);
  font-weight: 600;
  font-size: 14.5px;
}
.feature-desc { color: var(--pale); }

/* ── Cannot-do items ─────────────────────────────────────────────────────── */
.cannot-list { display: flex; flex-direction: column; gap: 0; }
.cannot-row {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}
.cannot-row:first-child { border-top: 1px solid var(--rule); }
.cannot-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}
.cannot-icon {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(199,221,243,.35);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cannot-icon::before { content: '—'; font-size: 10px; color: var(--pale); }
.cannot-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: #fff;
}
.cannot-body { color: var(--pale); font-size: 15.5px; padding-left: 32px; }

/* ── Privacy table ────────────────────────────────────────────────────────── */
.data-table-wrap { overflow-x: auto; margin: 20px 0; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.data-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mango);
  padding: 10px 16px 10px 0;
  border-bottom: 1px solid var(--rule);
  font-weight: 600;
}
.data-table td {
  vertical-align: top;
  padding: 14px 16px 14px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--pale);
  line-height: 1.6;
}
.data-table td:first-child { color: #fff; font-weight: 500; }

/* ── Inline code ──────────────────────────────────────────────────────────── */
code {
  font-family: var(--mono);
  font-size: .875em;
  background: var(--harbour);
  color: var(--green);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--rule);
}

/* ── Footer ───────────────────────────────────────────────────────────────── */
.doc-footer {
  border-top: 1px solid var(--rule);
  padding: 32px 0;
  margin-top: 64px;
  font-size: 13.5px;
  color: rgba(199,221,243,.5);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.doc-footer a {
  color: rgba(199,221,243,.6);
  text-decoration: none;
  transition: color .15s;
}
.doc-footer a:hover { color: var(--green); }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .feature-row { grid-template-columns: 1fr; gap: 4px; }
  .doc-nav-links { display: none; }
  .steps li { grid-template-columns: 32px 1fr; }
}

/* ── Scroll to top ────────────────────────────────────────────────────────── */
.back-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 200;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--harbour);
  border: 1px solid var(--rule);
  color: var(--pale);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .2s, transform .2s, background .15s;
  pointer-events: none;
}
.back-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-top:hover { background: #2A6DB0; color: #fff; }

/* ── Mobile hamburger menu ────────────────────────────────────────────────── */
.doc-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--pale);
  flex-shrink: 0;
}
.doc-nav-toggle:hover { color: #fff; }
.doc-nav-drawer {
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--harbour);
  border-top: 1px solid var(--rule);
  padding: 8px 0 12px;
}
.doc-nav-drawer a {
  display: block;
  padding: 11px 24px;
  color: var(--pale);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid var(--rule);
  transition: color .15s, background .15s;
}
.doc-nav-drawer a:last-child { border-bottom: none; }
.doc-nav-drawer a:hover { color: #fff; background: rgba(160,200,240,.06); }
.doc-nav-drawer a.active { color: var(--mango); }
.doc-nav-drawer.open { display: flex; }

@media (max-width: 640px) {
  .doc-nav-links { display: none; }
  .doc-nav-toggle { display: block; }
}