/* PayCaptain Developers. Brand tokens taken from the PayCaptain palette: navy, teal, coral. */
@font-face { font-family: "DM Sans"; src: url("/assets/fonts/dm-sans.woff2") format("woff2"); font-weight: 100 1000; font-display: swap; }
@font-face { font-family: "Fraunces"; src: url("/assets/fonts/fraunces.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }

:root {
  --navy: #0b213d; --navy-light: #143052; --navy-mid: #1c4069;
  --teal: #00b3aa; --teal-logo: #37c4c0; --coral: #ff6b57; --amber: #f2a227;
  --bg: #f6f8f9; --surface: #fff; --text: #2c3744; --muted: #5b6776; --border: #dde2e7;
  --link: #00756f; --code-bg: #eef1f4; --must-bg: #fff1ee; --must-text: #b3301f; --note-bg: #e6f7f6;
  --cond-text: #8a5a00; --cond-bg: #fdf3df;
  --sans: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Fraunces", Georgia, serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --top: 60px; --side: 250px; --toc: 220px; --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #0b213d; --surface: #143052; --text: #f2f5f8; --muted: #afb7c0; --border: #1c4069;
  --link: #5fd6d0; --code-bg: #10294a; --must-bg: #3a1f2a; --must-text: #ff9a8b; --note-bg: #0f3a4a;
  --cond-text: #f6c467; --cond-bg: #3a3020; color-scheme: dark;
} }
:root[data-theme="dark"] {
  --bg: #0b213d; --surface: #143052; --text: #f2f5f8; --muted: #afb7c0; --border: #1c4069;
  --link: #5fd6d0; --code-bg: #10294a; --must-bg: #3a1f2a; --must-text: #ff9a8b; --note-bg: #0f3a4a;
  --cond-text: #f6c467; --cond-bg: #3a3020; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--top) + 16px); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 var(--sans); }
a { color: var(--link); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.skip { position: absolute; left: -999px; top: 8px; z-index: 50; background: var(--surface); padding: 8px 12px; border-radius: 6px; }
.skip:focus { left: 8px; }

/* Top bar */
.top { position: sticky; top: 0; z-index: 30; height: var(--top); display: flex; align-items: center; gap: 12px; padding: 0 20px; background: var(--navy); color: #fff; border-bottom: 1px solid var(--navy-mid); }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; margin-right: auto; }
.brand svg { height: 30px; width: auto; display: block; }
.brand span { font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--teal-logo); border-left: 1px solid var(--navy-mid); padding-left: 12px; }
.top-links { display: flex; gap: 20px; font-size: 14px; }
.top-links a { color: #d5dde6; text-decoration: none; }
.top-links a:hover { color: #fff; }
.icon-btn { display: grid; place-items: center; width: 40px; height: 40px; border: 0; border-radius: 8px; background: none; color: #d5dde6; cursor: pointer; }
.icon-btn:hover { background: var(--navy-light); color: #fff; }
.menu { display: none; margin-left: -8px; }

/* Layout */
.shell { display: grid; grid-template-columns: var(--side) minmax(0, 1fr) var(--toc); max-width: 1440px; margin: 0 auto; }
.side, .toc { position: sticky; top: var(--top); align-self: start; height: calc(100vh - var(--top)); overflow-y: auto; padding: 28px 20px; font-size: 14.5px; }
.side { border-right: 1px solid var(--border); }
.nav-group + .nav-group { margin-top: 22px; }
.nav-group p, .toc p { margin: 0 0 6px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.side ul, .toc ul { list-style: none; margin: 0; padding: 0; }
.side a { display: block; padding: 6px 10px; margin: 1px -10px; border-radius: 7px; color: var(--text); text-decoration: none; }
.side a:hover { background: var(--code-bg); }
.side a[aria-current] { background: var(--note-bg); color: var(--link); font-weight: 600; box-shadow: inset 3px 0 0 var(--teal); }
.toc a { display: block; padding: 4px 0; color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--link); }

main { min-width: 0; padding: 0 clamp(20px, 4vw, 56px); }
.doc { max-width: 820px; margin: 0 auto; padding: 40px 0 24px; }

/* Type */
h1, h2 { font-family: var(--serif); font-weight: 600; letter-spacing: -.01em; line-height: 1.2; }
h1 { font-size: clamp(2rem, 4.5vw, 2.6rem); margin: 0 0 12px; }
h2 { font-size: 1.5rem; margin: 2.6em 0 .6em; padding-top: .2em; }
h3 { font-size: 1.1rem; margin: 2em 0 .5em; }
p, ul, ol { margin: 0 0 1em; }
li { margin: .25em 0; }
.anchor { margin-left: 8px; color: var(--muted); text-decoration: none; opacity: 0; font-family: var(--sans); font-weight: 400; }
h2:hover .anchor, h3:hover .anchor, .anchor:focus { opacity: 1; }
.eyebrow { margin: 0 0 8px; font-size: 12.5px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--link); }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.pagehead { padding-bottom: 20px; margin-bottom: 28px; border-bottom: 1px solid var(--border); }
.mdlink { font-size: 13.5px; }

/* Home hero */
.hero { margin: 0 0 8px; padding: clamp(28px, 5vw, 48px); border-radius: 16px; background: var(--navy); color: #fff; border: 1px solid var(--navy-mid); background-image: radial-gradient(600px 300px at 100% 0, rgba(0, 179, 170, .28), transparent 70%); }
.hero .eyebrow { color: var(--teal-logo); }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); }
.hero .lede { color: #d5dde6; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 20px; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .35); color: #fff; font-weight: 600; text-decoration: none; }
.btn:hover { border-color: #fff; }
.btn.primary { background: var(--teal); border-color: var(--teal); color: var(--navy); }
.btn.primary:hover { background: var(--teal-logo); }
.btn.ghost { font-family: var(--mono); font-weight: 400; font-size: 14px; }
.proof { display: flex; flex-wrap: wrap; gap: 6px 22px; list-style: none; margin: 0; padding: 0; font-size: 13.5px; color: #afb7c0; }
.proof li { margin: 0; }
.proof li::before { content: "✓"; color: var(--teal-logo); margin-right: 7px; }

/* Code */
code { font-family: var(--mono); font-size: .875em; background: var(--code-bg); padding: .12em .38em; border-radius: 5px; overflow-wrap: anywhere; }
pre { position: relative; margin: 0 0 1.2em; padding: 16px 18px; overflow-x: auto; background: var(--navy); color: #e6edf5; border: 1px solid var(--navy-mid); border-radius: var(--radius); font-size: 14px; line-height: 1.55; }
pre code { background: none; padding: 0; font-size: 13.5px; overflow-wrap: normal; }
.copy { position: absolute; top: 8px; right: 8px; padding: 3px 10px; font: 12px var(--sans); color: #d5dde6; background: var(--navy-light); border: 1px solid var(--navy-mid); border-radius: 6px; cursor: pointer; opacity: 0; }
pre:hover .copy, .copy:focus { opacity: 1; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 0 0 1.4em; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { padding: 10px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
th { font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); background: var(--bg); white-space: nowrap; }
th:empty { display: none; }
tr:last-child td { border-bottom: 0; }

/* Callouts */
blockquote { margin: 0 0 1.2em; padding: 14px 18px; border-left: 4px solid var(--teal); background: var(--note-bg); border-radius: 0 var(--radius) var(--radius) 0; }
blockquote p:last-child { margin: 0; }
.callout.must { border-color: var(--coral); background: var(--must-bg); }
.tag { display: inline-block; margin-right: 8px; font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--link); }
.must .tag { color: var(--must-text); }

/* Field reference */
.filter { position: sticky; top: calc(var(--top) + 8px); z-index: 5; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding: 10px 12px; margin: 0 0 8px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 4px 16px rgba(11, 33, 61, .06); font-size: 14px; }
.filter-search { flex: 1 1 220px; }
.filter input[type=search] { width: 100%; padding: 8px 12px; font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 7px; }
.filter-req { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.filter input[type=checkbox] { accent-color: var(--teal); width: 16px; height: 16px; }
.filter-count { color: var(--muted); margin-left: auto; }
.fields { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.field { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 4px 24px; padding: 18px 20px; border-bottom: 1px solid var(--border); }
.field { scroll-margin-top: calc(var(--top) + 84px); }
.field:last-child { border-bottom: 0; }
.field:target { box-shadow: inset 3px 0 0 var(--teal); background: var(--note-bg); }
.field header { display: flex; flex-wrap: wrap; align-items: center; align-content: start; gap: 6px 8px; }
.fname { flex-basis: 100%; text-decoration: none; }
.fname code { font-size: 15px; font-weight: 600; background: none; padding: 0; color: var(--text); }
.fname:hover code { color: var(--link); }
.ftype { font: 12.5px var(--mono); color: var(--muted); }
.badge { font-size: 11.5px; font-weight: 600; padding: 2px 9px; border-radius: 999px; }
.badge.required { background: var(--navy); color: #fff; }
:root[data-theme="dark"] .badge.required { background: var(--teal); color: var(--navy); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .badge.required { background: var(--teal); color: var(--navy); } }
.badge.conditional { background: var(--cond-bg); color: var(--cond-text); }
.badge.optional { color: var(--muted); border: 1px solid var(--border); font-weight: 400; }
.fdesc { margin: 0 0 6px; }
.field dl { margin: 0; font-size: 14.5px; }
.field dl div { display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 12px; padding: 3px 0; }
.field dt { color: var(--muted); font-size: 13px; padding-top: 1px; }
.field dd { margin: 0; }
.field .rule dd { font-weight: 500; }
.field .pattern code { display: block; padding: 6px 8px; font-size: 12px; overflow-wrap: anywhere; }
.fnotes { margin-top: 8px; font-size: 14.5px; }

/* Pager and footer */
.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 56px; }
.pager a { flex: 0 1 48%; padding: 14px 18px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); text-decoration: none; font-weight: 600; }
.pager a:hover { border-color: var(--teal); }
.pager span { display: block; font-size: 12px; font-weight: 400; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.pager .next { text-align: right; margin-left: auto; }
.foot { max-width: 820px; margin: 40px auto 0; padding: 24px 0 40px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--muted); }
.foot p { margin: 0 0 6px; }

/* Responsive */
@media (max-width: 1180px) { .shell { grid-template-columns: var(--side) minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 860px) {
  .shell { display: block; }
  .menu { display: grid; }
  .top-links { display: none; }
  .top { padding: 0 14px; }
  .side { position: fixed; z-index: 25; top: var(--top); left: 0; bottom: 0; width: min(300px, 86vw); height: auto; background: var(--bg); transform: translateX(-100%); transition: transform .2s ease; visibility: hidden; }
  .nav-open .side { transform: none; visibility: visible; box-shadow: 0 0 0 100vmax rgba(11, 33, 61, .5); }
  .doc { padding-top: 24px; }
  .field { grid-template-columns: 1fr; gap: 8px; padding: 16px; }
  .fname { flex-basis: auto; margin-right: 4px; }
  .field dl div { grid-template-columns: 1fr; gap: 0; padding: 5px 0; }
  .filter { top: calc(var(--top) + 4px); }
  .filter-count { margin-left: 0; }
  .pager { flex-direction: column; }
  .pager a { flex-basis: auto; }
  .copy { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
@media print { .top, .side, .toc, .filter, .pager, .copy { display: none !important; } .shell { display: block; } pre { color: #000; background: #fff; } }