:root {
  --code: #0f0b1f;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: #fff; font-size: 15px; line-height: 1.6; }
a { color: var(--purple); }
.top { position: sticky; top: 0; z-index: 3; display: flex; align-items: center; justify-content: space-between; padding: 12px 24px; background: #1d1433; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { height: 24px; }
.brand span { color: #b9addf; border-left: 1px solid #4a3a7a; padding-left: 10px; font-size: 14px; }
.top .links a { color: #d9d0f5; margin-left: 18px; font-size: 14px; text-decoration: none; }
.layout { display: grid; grid-template-columns: 250px 1fr; }
.side { position: sticky; top: 52px; height: calc(100vh - 52px); overflow: auto; padding: 20px 16px; border-right: 1px solid var(--line); background: var(--bg); }
.side a { display: block; padding: 4px 10px; border-radius: 6px; color: var(--ink); text-decoration: none; font-size: 14px; }
.side a:hover { background: #f0eafe; color: var(--purple); }
.side .group { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; color: var(--muted); margin: 16px 10px 6px; }
.content { padding: 32px 48px 80px; max-width: 980px; }
section { margin-bottom: 44px; scroll-margin-top: 70px; }
h1 { font-size: 30px; letter-spacing: -.02em; margin: 0 0 8px; }
h2 { font-size: 22px; letter-spacing: -.01em; margin: 30px 0 10px; scroll-margin-top: 70px; }
h3.sub { margin: 14px 0 6px; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.lede { font-size: 17px; color: #3c3950; }
.muted, .note { color: var(--muted); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .88em; background: #f3f0fb; padding: 1px 5px; border-radius: 4px; }
pre { background: var(--code); color: #e6e0ff; padding: 14px 16px; border-radius: 10px; overflow: auto; font-size: 13px; line-height: 1.55; }
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.steps { padding-left: 20px; } .steps li { margin: 6px 0; }
table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 8px 0; }
th, td { border-bottom: 1px solid var(--line); padding: 7px 8px; text-align: left; vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.flow { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; color: var(--muted); margin: 10px 0 14px; font-size: 13px; }
.flow span { background: #f3f0fb; color: var(--ink); padding: 3px 9px; border-radius: 999px; font-family: ui-monospace, monospace; }
.flow span.ok { background: #e3f4ec; color: #0f7b55; }
.tabs { display: flex; gap: 4px; margin-top: 10px; }
.tabs button { border: 1px solid var(--line); background: #fff; border-radius: 8px 8px 0 0; padding: 6px 12px; cursor: pointer; font: inherit; font-size: 13px; }
.tabs button.on { background: var(--code); color: #fff; border-color: var(--code); }
.tabs + pre { margin-top: 0; border-top-left-radius: 0; }
.op { border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin: 14px 0; scroll-margin-top: 70px; }
.op-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.op-head code { font-size: 15px; background: none; padding: 0; font-weight: 600; }
.op-head .sum { color: var(--muted); }
.method { font: 700 12px/1 ui-monospace, monospace; padding: 5px 8px; border-radius: 6px; color: #fff; }
.method.get { background: #0f7b55; } .method.post { background: var(--purple); }
.fields td:first-child { width: 28%; white-space: nowrap; }
.fields .type { color: var(--muted); font-family: ui-monospace, monospace; font-size: 12.5px; width: 24%; }
.req { color: #b42318; font-size: 11px; font-weight: 600; }
.samples { display: grid; grid-template-columns: 1fr; gap: 4px; }
.samples > div { min-width: 0; }
.samples pre { margin: 0; max-height: 360px; }
[hidden] { display: none !important; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } .samples { grid-template-columns: 1fr; } }

/* version + build, bottom-left on every page */
.pr-build { position: static; display: block; clear: both; margin: 0; padding: 18px 16px 14px; font: 11px/1.3 var(--mono); color: #4f4a63; text-align: left; }
@media print { .pr-build { display: none; } }

/* legal pages */
.legal { max-width: 860px; margin: 0 auto; padding: 40px 24px 80px; }
.legal h2 { font-size: 18px; margin-top: 30px; }
.legal .draft { background: hsl(45 100% 96%); border: 1px solid hsl(42 80% 80%); border-radius: 10px; padding: 10px 14px; }
.legal table td { font-size: 14px; }

.doc-search { width: 100%; height: 36px; padding: 0 12px; margin: 0 0 6px; font-size: 14px; }
.side a.on { background: hsl(var(--primary) / .09); color: var(--purple); font-weight: 600; }
.section-title { font-size: 30px; margin-top: 10px; }
.menu-btn { display: none; height: 32px; padding: 0 12px; border-radius: 8px; border: 1px solid hsl(255 30% 40%); background: none; color: #fff; font-size: 13px; cursor: pointer; }
.content { min-width: 0; }
pre { overflow-x: auto; max-width: 100%; }
@media (max-width: 900px) {
  .menu-btn { display: inline-block; margin-left: 0; }
  .top { padding: 12px 14px; }
  .top .links a { margin-left: 12px; }
  .brand span { display: none; }
  .side { display: block; position: fixed; inset: 52px auto 0 0; width: 82vw; max-width: 320px; height: auto; z-index: 30; transform: translateX(-100%);
    transition: transform .2s; box-shadow: 0 10px 40px rgba(0,0,0,.25); }
  body.menu-open .side { transform: none; }
  .content { padding: 22px 16px 60px; overflow-wrap: anywhere; }
  table { display: block; overflow-x: auto; }
  h1 { font-size: 26px; }
}

/* payer help form */
.help-form { display: grid; gap: 14px; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin-top: 12px; }
.help-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.help-form label { display: grid; gap: 6px; font-size: 14px; font-weight: 500; }
.help-form input, .help-form textarea { width: 100%; min-width: 0; padding: 10px 12px; font-size: 16px; }
.help-form input { height: 44px; }
.help-form .hp { position: absolute; left: -10000px; }
.help-form button { justify-self: start; height: 44px; padding: 0 20px; border: 0; border-radius: 10px; background: var(--purple); color: #fff; font-weight: 600; font-size: 15px; cursor: pointer; }
.help-form button:disabled { opacity: .6; }
.help-form .error { color: var(--bad); margin: 0; }
.help-form .small { font-size: 13px; margin: 0; }
.sent { background: var(--ok-50); color: var(--ok); font-weight: 600; padding: 14px 16px; border-radius: 10px; }
@media (max-width: 640px) { .help-form .row { grid-template-columns: 1fr; } }