/* Cashwo Developers — shared styles.
   Layout: top bar + left navigation rail + one reading column. Code and
   tables scroll inside their own boxes so the page never scrolls sideways. */
:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --ink: #161a3a;
  --muted: #5a6082;
  --line: #dfe2ee;
  --navy: #1d2257;
  --bar: #ffffff;
  --bar-ink: #161a3a;
  --accent: #f5b800;
  --accent-ink: #1d2257;
  --code-bg: #12163a;
  --code-ink: #e6e8f6;
  --code-dim: #9aa0c8;
  --code-key: #ffd25e;
  --code-str: #9fe0b8;
  --ok: #1f7a4d;
  --ok-bg: #e3f4ea;
  --warn: #8a5a00;
  --warn-bg: #fff3d1;
  --bad: #a3263a;
  --bad-bg: #fbe5e9;
  --soft: #fbfbfe;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1130; --surface: #161a40; --ink: #e8eaf7; --muted: #a6abcf; --line: #2b3066;
    --navy: #c9cdf5; --bar: #0a0c24; --bar-ink: #e8eaf7; --accent: #ffc928; --accent-ink: #12163a;
    --code-bg: #0a0c24; --code-ink: #e6e8f6; --code-dim: #8d93c0; --code-key: #ffd25e; --code-str: #9fe0b8;
    --ok: #7fdcaa; --ok-bg: #12352a; --warn: #ffd27a; --warn-bg: #3a2f10; --bad: #ff9aab; --bad-bg: #40172a;
    --soft: #11143a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1130; --surface: #161a40; --ink: #e8eaf7; --muted: #a6abcf; --line: #2b3066;
  --navy: #c9cdf5; --bar: #0a0c24; --bar-ink: #e8eaf7; --accent: #ffc928; --accent-ink: #12163a;
  --code-bg: #0a0c24; --code-ink: #e6e8f6; --code-dim: #8d93c0; --code-key: #ffd25e; --code-str: #9fe0b8;
  --ok: #7fdcaa; --ok-bg: #12352a; --warn: #ffd27a; --warn-bg: #3a2f10; --bad: #ff9aab; --bad-bg: #40172a;
  --soft: #11143a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--body); }
img { max-width: 100%; }
[hidden] { display: none !important; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; border-radius: 6px; z-index: 50; }
.skip:focus { left: 8px; }

/* Top bar */
.topbar { background: var(--bar); color: var(--bar-ink); position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); }
.topbar-inner {
  max-width: 1240px; margin: 0 auto; display: flex; align-items: center; gap: 16px;
  padding: 12px max(16px, env(safe-area-inset-right, 0px)) 12px max(16px, env(safe-area-inset-left, 0px));
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--bar-ink); text-decoration: none; font: 700 19px/1 var(--display); }
/* Logo: black artwork on the light bar, white artwork on the dark bar. */
.brand .logo { display: block; height: 30px; width: auto; }
.brand .logo-on-dark { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand .logo-on-light { display: none; }
  :root:not([data-theme="light"]) .brand .logo-on-dark { display: block; }
}
:root[data-theme="dark"] .brand .logo-on-light { display: none; }
:root[data-theme="dark"] .brand .logo-on-dark { display: block; }
.brand .sub { border-left: 1px solid var(--line); padding-left: 10px; }
.brand .sub { font: 600 13px/1 var(--body); letter-spacing: .08em; text-transform: uppercase; opacity: .75; }
.topbar .spacer { flex: 1; }
.topbar a.top-link { color: var(--bar-ink); text-decoration: none; font-weight: 600; font-size: 15px; opacity: .9; }
.topbar a.top-link:hover { opacity: 1; text-decoration: underline; text-decoration-color: var(--accent); }
.menu-btn { display: none; background: transparent; color: var(--bar-ink); border: 1px solid currentColor; border-radius: 6px; padding: 7px 10px; font: 600 14px/1 var(--body); cursor: pointer; }
.theme-btn { background: transparent; color: var(--bar-ink); border: 1px solid var(--line); border-radius: 6px; padding: 7px 10px; font: 600 13px/1 var(--body); cursor: pointer; }
.menu-btn:focus-visible, .theme-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Shell */
.shell {
  max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 48px;
  padding: 32px max(16px, env(safe-area-inset-right, 0px)) 80px max(16px, env(safe-area-inset-left, 0px));
}
.sidenav { position: sticky; top: 76px; align-self: start; font-size: 15px; max-height: calc(100vh - 96px); overflow-y: auto; }
.sidenav .group { font: 600 12px/1 var(--body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 18px 0 8px 10px; }
.sidenav .group:first-child { margin-top: 0; }
.sidenav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.sidenav a { display: block; padding: 6px 10px; border-radius: 6px; color: var(--ink); text-decoration: none; border-left: 2px solid transparent; }
.sidenav a:hover { background: var(--surface); border-left-color: var(--line); }
.sidenav a[aria-current="page"] { background: var(--surface); border-left-color: var(--accent); font-weight: 700; }
.sidenav ul ul { margin: 2px 0 6px 12px; }
.sidenav ul ul a { font-size: 14px; color: var(--muted); padding: 4px 10px; }
.sidenav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

@media (max-width: 920px) {
  .shell { grid-template-columns: minmax(0, 1fr); gap: 20px; padding-top: 20px; }
  .menu-btn { display: inline-block; }
  .topbar a.top-link { display: none; }
  .sidenav { position: static; max-height: none; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
  .sidenav:not(.open) { display: none; }
}

main { min-width: 0; }
.eyebrow { font: 600 13px/1 var(--body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
h1 { font: 700 clamp(32px, 4.6vw, 46px)/1.08 var(--display); letter-spacing: -.02em; margin: 12px 0 14px; color: var(--navy); text-wrap: balance; }
.lede { font-size: 19px; color: var(--muted); max-width: 64ch; margin: 0 0 8px; }
section { padding-top: 36px; scroll-margin-top: 80px; }
h2 { font: 700 27px/1.2 var(--display); letter-spacing: -.01em; margin: 0 0 14px; color: var(--navy); text-wrap: balance; }
h3 { font: 600 19px/1.3 var(--body); margin: 26px 0 8px; scroll-margin-top: 80px; }
p, li { max-width: 70ch; }
p { margin: 0 0 14px; }
ul, ol { padding-left: 22px; margin: 0 0 14px; }
li { margin-bottom: 6px; }
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 2px; }
code { font: 14.5px/1.4 var(--mono); background: var(--surface); border: 1px solid var(--line); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere; }
hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0 0; }

/* Cards on the overview */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin: 16px 0; }
.card { display: block; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px; text-decoration: none; color: var(--ink); min-width: 0; }
.card:hover { border-color: var(--accent); }
.card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.card .t { font-weight: 700; margin-bottom: 4px; }
.card .d { font-size: 15px; color: var(--muted); }

/* Payment flow strip */
.flow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 18px 0 8px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--surface); }
.flow div { padding: 16px; border-right: 1px solid var(--line); min-width: 0; }
.flow div:last-child { border-right: 0; }
.flow .step { font: 600 12px/1 var(--mono); color: var(--muted); }
.flow .t { font-weight: 700; margin: 6px 0 4px; }
.flow .d { font-size: 15px; color: var(--muted); }
@media (max-width: 700px) {
  .flow { grid-template-columns: minmax(0, 1fr); }
  .flow div { border-right: 0; border-bottom: 1px solid var(--line); }
  .flow div:last-child { border-bottom: 0; }
}

/* Tables */
.tablewrap { overflow-x: auto; margin: 14px 0 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 15.5px; }
th, td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th { font: 600 12px/1.2 var(--body); letter-spacing: .07em; text-transform: uppercase; color: var(--muted); background: var(--soft); }
td code { white-space: nowrap; }
.req, .opt { font: 600 12px/1 var(--body); padding: 3px 7px; border-radius: 999px; white-space: nowrap; }
.req { background: var(--warn-bg); color: var(--warn); }
.opt { background: var(--soft); color: var(--muted); border: 1px solid var(--line); }

/* Code */
.code { margin: 14px 0 18px; border-radius: 10px; background: var(--code-bg); color: var(--code-ink); }
.code .bar { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 8px 12px 0 16px; font: 600 12px/1 var(--mono); color: var(--code-dim); }
.code pre { margin: 0; padding: 12px 16px 16px; overflow-x: auto; font: 14px/1.6 var(--mono); }
.code .k { color: var(--code-key); }
.code .s { color: var(--code-str); }
.code .c { color: var(--code-dim); }
button.copy { font: 600 12px/1 var(--body); color: var(--code-ink); background: transparent; border: 1px solid var(--code-dim); border-radius: 6px; padding: 6px 10px; cursor: pointer; }
button.copy:hover { border-color: var(--code-key); color: var(--code-key); }
button.copy:focus-visible { outline: 2px solid var(--code-key); outline-offset: 2px; }

.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; }
.tabs button { font: 600 14px/1 var(--body); padding: 8px 12px; border-radius: 6px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--navy); color: var(--bg); border-color: var(--navy); }
.tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Callouts and pills */
.note { border-radius: 10px; padding: 14px 16px; margin: 14px 0 18px; font-size: 16px; border: 1px solid var(--line); background: var(--surface); }
.note.warn { background: var(--warn-bg); border-color: transparent; }
.note strong { display: block; margin-bottom: 2px; }
.pill { display: inline-block; font: 600 12.5px/1 var(--mono); padding: 4px 8px; border-radius: 4px; border: 1px solid var(--line); background: var(--surface); }
.pill.ok { background: var(--ok-bg); color: var(--ok); border-color: transparent; }
.pill.bad { background: var(--bad-bg); color: var(--bad); border-color: transparent; }
.pill.wait { background: var(--warn-bg); color: var(--warn); border-color: transparent; }
.states { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 10px 0 16px; }
.states .arrow { color: var(--muted); }
.method { font: 700 12px/1 var(--mono); background: var(--accent); color: var(--accent-ink); padding: 4px 7px; border-radius: 4px; margin-right: 8px; vertical-align: 2px; }

ul.check { list-style: none; padding-left: 0; }
ul.check li { position: relative; padding-left: 30px; }
ul.check li::before { content: ""; position: absolute; left: 0; top: 4px; width: 18px; height: 18px; border: 2px solid var(--line); border-radius: 4px; background: var(--surface); }

/* Prev / next */
.pager { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 48px; }
.pager a { flex: 1 1 220px; border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 14px 16px; text-decoration: none; color: var(--ink); }
.pager a:hover { border-color: var(--accent); }
.pager a.next { text-align: right; }
.pager .lbl { display: block; font-size: 13px; color: var(--muted); }
.pager .ttl { font-weight: 700; }

footer.site { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 20px; color: var(--muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 8px 24px; }