/* Stellar Payment API docs — shared styles */
:root {
  --bg: #131110;
  --bg-soft: #1a1715;
  --surface: #201d1a;
  --border: #332e2a;
  --border-soft: #262220;
  --text: #e9e4de;
  --text-muted: #9c958c;
  --text-faint: #6f6a63;
  --accent: #e5a13c;          /* BTC gold */
  --accent-strong: #f4b650;
  --accent-dim: rgba(229, 161, 60, 0.14);
  --silver: #c8ccd2;          /* LTC silver */
  --good: #7fbf7f;
  --bad: #d98a7a;
  --warn: #dfb45f;
  --mono: ui-monospace, "Cascadia Code", Consolas, "SF Mono", Menlo, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --sidebar-w: 264px;
  --radius: 8px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* ---- layout ---- */
.layout { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }

/* ---- sidebar ---- */
aside {
  position: sticky; top: 0; height: 100vh;
  border-right: 1px solid var(--border-soft);
  background: var(--bg-soft);
  padding: 24px 0 24px 24px;
  overflow-y: auto;
}
.brand { display: flex; align-items: baseline; gap: 8px; padding: 0 16px 20px 0; }
.brand-mark { color: var(--accent); font-family: var(--mono); font-weight: 700; }
.brand-name { font-weight: 700; letter-spacing: 0.02em; }
.brand-sub { display: block; font-size: 12px; color: var(--text-faint); font-family: var(--mono); }
nav a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 16px 6px 0;
  font-size: 14px;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
}
nav a:hover { color: var(--text); }
nav a:focus-visible { outline: 2px dashed var(--accent); outline-offset: 2px; border-radius: 4px; }
nav a.active { color: var(--accent-strong); border-left-color: var(--accent); }
.nav-group { font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-faint); margin: 20px 0 6px; padding-right: 16px; }
nav a.indent { padding-left: 14px; }

/* ---- main ---- */
main { padding: 48px 48px 96px; max-width: 860px; }
.hero { padding-bottom: 40px; border-bottom: 1px solid var(--border-soft); margin-bottom: 40px; }
.kicker { font-family: var(--mono); font-size: 13px; color: var(--accent); margin: 0 0 12px; }
h1 { font-size: 40px; line-height: 1.15; margin: 0 0 12px; font-weight: 750; letter-spacing: -0.02em; }
.lede { font-size: 18px; color: var(--text-muted); max-width: 62ch; margin: 0; }
.coin-pills { margin-top: 20px; display: flex; gap: 8px; }
.coin-pill {
  font-family: var(--mono); font-size: 12px;
  padding: 4px 12px; border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.coin-pill.btc { color: var(--accent-strong); border-color: rgba(229,161,60,0.4); }
.coin-pill.ltc { color: var(--silver); border-color: rgba(200,204,210,0.35); }

section { margin-bottom: 56px; scroll-margin-top: 24px; }
h2 { font-size: 26px; margin: 0 0 16px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 28px 0 10px; }
p { max-width: 70ch; }
p, li { color: var(--text); }
li { margin-bottom: 6px; }
a { color: var(--accent-strong); }
a:hover { text-decoration: none; }
strong { color: var(--text); }

/* ---- code ---- */
.codeblock { position: relative; margin: 16px 0; }
.codeblock pre {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 0;
  font: 13.5px/1.65 var(--mono);
}
.codeblock .lang {
  position: absolute; top: 8px; right: 8px;
  font: 11px var(--mono); color: var(--text-faint);
  text-transform: uppercase; letter-spacing: 0.08em;
}
.copy {
  position: absolute; top: 6px; right: 6px;
  background: transparent; border: 1px solid transparent;
  color: var(--text-faint); font: 12px var(--sans);
  padding: 4px 10px; border-radius: 6px; cursor: pointer;
  opacity: 0; transition: opacity 0.15s ease;
}
.codeblock:hover .copy, .copy:focus-visible { opacity: 1; }
.copy:hover { color: var(--text); border-color: var(--border); }
.copy.copied { color: var(--good); border-color: rgba(127,191,127,0.4); }
.copy:focus-visible { outline: 2px dashed var(--accent); outline-offset: 2px; }
code {
  font-family: var(--mono);
  background: var(--surface); border: 1px solid var(--border-soft);
  padding: 1px 6px; border-radius: 4px; font-size: 0.88em;
}
pre code { background: none; border: none; padding: 0; font-size: 1em; }
.hl { color: var(--accent-strong); }
.cm { color: var(--text-faint); }
.ok { color: var(--good); }

/* ---- tables ---- */
.tablewrap { overflow-x: auto; border: 1px solid var(--border-soft); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 14px; min-width: 560px; }
th {
  text-align: left; font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--text-faint);
  padding: 10px 16px; border-bottom: 1px solid var(--border); background: var(--bg-soft);
}
td { padding: 10px 16px; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
tr:last-child td { border-bottom: none; }
td code { white-space: nowrap; }

/* ---- status pills ---- */
.pill {
  display: inline-block; font-family: var(--mono); font-size: 12px;
  padding: 2px 10px; border-radius: 999px; border: 1px solid;
}
.pill.pending { color: var(--warn); border-color: rgba(223,180,95,0.45); }
.pill.paid { color: var(--good); border-color: rgba(127,191,127,0.45); }
.pill.underpaid { color: var(--bad); border-color: rgba(217,138,122,0.5); }

/* ---- lifecycle diagram ---- */
.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 20px 0; }
.flow-step {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 16px; background: var(--bg-soft); font-size: 14px;
}
.flow-step .step-label { display: block; font-family: var(--mono); font-size: 11px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.1em; }
.flow-step .step-val { font-family: var(--mono); color: var(--accent-strong); }
.flow-arrow { color: var(--text-faint); font-size: 18px; }

/* ---- callouts ---- */
.note {
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  background: var(--bg-soft); border-radius: 6px;
  padding: 12px 16px; margin: 16px 0; font-size: 14.5px;
}
.note.warn { border-left-color: var(--warn); }
.note.good { border-left-color: var(--good); }
.note .note-title { font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 4px; }
.note.warn .note-title { color: var(--warn); }
.note.good .note-title { color: var(--good); }

/* ---- footer ---- */
footer { border-top: 1px solid var(--border-soft); padding-top: 24px; color: var(--text-faint); font-size: 13px; }

/* ---- menu button (mobile) ---- */
.menu-btn {
  display: none; position: sticky; top: 0; z-index: 50;
  width: 100%; background: var(--bg-soft); border: none; border-bottom: 1px solid var(--border-soft);
  color: var(--text); font: 600 14px var(--sans); padding: 14px 20px; text-align: left;
  cursor: pointer;
}
.menu-btn:focus-visible { outline: 2px dashed var(--accent); outline-offset: -2px; }

/* ---- responsive ---- */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  aside {
    position: fixed; inset: 0 auto 0 0; width: min(320px, 85vw);
    transform: translateX(-105%); transition: transform 0.2s ease;
    z-index: 40; box-shadow: 0 0 40px rgba(0,0,0,0.5);
  }
  aside.open { transform: none; }
  .menu-btn { display: block; }
  main { padding: 32px 20px 72px; }
  h1 { font-size: 30px; }
  .lede { font-size: 16px; }
  .copy { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  aside { transition: none; }
}