/* hood-pay docs: dark, technical, no external assets */
:root {
  --bg: #08080a;
  --bg-raised: #111115;
  --bg-inset: #0c0c10;
  --border: #212127;
  --border-strong: #32323a;
  --text: #eeeef1;
  --text-dim: #9a9aa4;
  --text-faint: #5f5f69;
  --accent-a: #7ef29a;
  --accent-b: #56d6f5;
  --accent-grad: linear-gradient(96deg, var(--accent-a), var(--accent-b));
  --ok: #7ef29a;
  --warn: #f0c674;
  --bad: #f26d7e;
  --mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.62 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent-a); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent-b);
  outline-offset: 2px;
  border-radius: 4px;
}
code, pre { font-family: var(--mono); font-size: 0.86em; }
pre {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  line-height: 1.55;
}
code:not(pre code) {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
}
.wrap { max-width: 1020px; margin: 0 auto; padding: 0 22px; }

nav.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
nav.top .wrap { display: flex; align-items: center; gap: 22px; height: 56px; }
.brand { font-weight: 700; letter-spacing: -0.02em; font-size: 16px; }
.brand .tick {
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
nav.top .links {
  display: flex; gap: 18px; margin-left: auto; font-size: 14px; color: var(--text-dim);
}
nav.top .links a { padding: 4px 2px; transition: color 0.15s ease; }

.hero { padding: 78px 0 34px; }
.hero h1 {
  font-size: clamp(30px, 5.2vw, 50px);
  line-height: 1.08; letter-spacing: -0.035em; margin: 0 0 14px; font-weight: 750;
}
.hero h1 .grad {
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lede { color: var(--text-dim); font-size: 17px; max-width: 660px; margin: 0 0 26px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: 8px; padding: 9px 18px; font-size: 14px; font-weight: 600;
  border: 1px solid var(--border-strong); background: var(--bg-raised); color: var(--text);
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.15s ease, filter 0.15s ease;
}
.btn:hover { border-color: var(--accent-a); transform: translateY(-1px); }
.btn.primary { background: var(--accent-grad); color: #06210f; border: none; }
.btn.primary:hover { filter: brightness(1.06); color: #06210f; }
.install {
  font-family: var(--mono); font-size: 13.5px; color: var(--text-dim);
  background: var(--bg-inset); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 16px; display: inline-flex; gap: 10px; align-items: center;
}
.install .dollar { color: var(--accent-a); user-select: none; }

/* the gasless flow diagram */
.flow-head { display: flex; align-items: baseline; gap: 12px; margin: 46px 0 16px; }
.flow-head h2 { margin: 0; font-size: 20px; letter-spacing: -0.02em; }
.flow {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 18px;
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: 16px; padding: 30px 26px;
}
.flow .actor { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; }
.flow .actor .avatar {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--bg-inset); border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.flow .actor .label { font-size: 12.5px; color: var(--text-dim); font-weight: 600; }
.flow .actor .sub { font-size: 11.5px; color: var(--text-faint); }
.flow .wire { position: relative; height: 92px; }
.flow .wire .track {
  position: absolute; top: 50%; left: 0; right: 0; height: 2px;
  background: var(--border-strong); transform: translateY(-50%);
}
.flow .wire .packet {
  position: absolute; top: 50%; width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent-a); transform: translate(-50%, -50%);
  box-shadow: 0 0 10px color-mix(in srgb, var(--accent-a) 70%, transparent);
  animation: hp-packet 5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}
.flow .wire .packet.b {
  background: var(--accent-b); animation-delay: -1.25s;
  box-shadow: 0 0 10px color-mix(in srgb, var(--accent-b) 70%, transparent);
}
.flow .wire .caption {
  position: absolute; top: calc(50% - 27px); left: 50%; transform: translateX(-50%);
  font-family: var(--mono); font-size: 11px; color: var(--text-faint);
  white-space: nowrap; opacity: 0; animation: hp-caption 5s ease-in-out infinite;
}
.flow .wire .caption.c1 { animation-delay: 0s; }
.flow .wire .caption.c2 { animation-delay: -1.25s; color: var(--accent-b); }
.flow .wire .caption.c3 { animation-delay: -2.5s; color: var(--warn); }
.flow .wire .caption.c4 { animation-delay: -3.75s; color: var(--ok); }
@keyframes hp-packet {
  0% { left: 0%; opacity: 0; }
  4% { opacity: 1; }
  46% { left: 100%; opacity: 1; }
  50%, 100% { opacity: 0; left: 100%; }
}
@keyframes hp-caption {
  0% { opacity: 0; } 4% { opacity: 1; } 20% { opacity: 1; } 26%, 100% { opacity: 0; }
}
.flow-legend { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 14px; font-size: 12.5px; color: var(--text-faint); }
.flow-legend .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.flow-legend .dot.a { background: var(--accent-a); }
.flow-legend .dot.b { background: var(--accent-b); }
@media (prefers-reduced-motion: reduce) {
  .flow .wire .packet, .flow .wire .caption { animation: none; opacity: 0; }
}

section.block { margin: 62px 0; }
section.block h2 { font-size: 22px; letter-spacing: -0.02em; margin: 0 0 6px; }
section.block p.sub { color: var(--text-dim); margin: 0 0 20px; max-width: 680px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
.card {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px 20px;
  transition: border-color 0.15s ease, transform 0.12s ease;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.card h3 { margin: 0 0 6px; font-size: 15px; }
.card h3 code { font-size: 13px; }
.card p { margin: 0; color: var(--text-dim); font-size: 13.5px; }

.disclosure {
  border: 1px solid var(--border); border-left: 3px solid var(--accent-b);
  background: var(--bg-inset); border-radius: 10px; padding: 14px 18px;
  color: var(--text-dim); font-size: 13.5px; margin: 24px 0;
}
.disclosure.warn { border-left-color: var(--warn); }

table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
th, td { text-align: left; padding: 9px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--text-faint); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
tr:last-child td { border-bottom: none; }
td.yes { color: var(--ok); }
td.no { color: var(--text-faint); }

.tabs { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.tab-btn {
  background: var(--bg-inset); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 8px; padding: 7px 14px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.tab-btn:hover { color: var(--text); }
.tab-btn[aria-selected="true"] { background: var(--accent-grad); color: #06210f; border-color: transparent; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* state gallery */
.states { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 10px; }
.state {
  border: 1px solid var(--border); border-radius: 10px; padding: 13px 15px; background: var(--bg-raised);
}
.state .row { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; }
.state .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; background: var(--text-faint); }
.state .dot.progress, .state .dot.success { background: var(--ok); }
.state .dot.danger { background: var(--bad); }
.state .dot.warning { background: var(--warn); }
.state p { margin: 6px 0 0; font-size: 12.5px; color: var(--text-faint); }
.state code { font-size: 11.5px; }

footer {
  border-top: 1px solid var(--border); margin-top: 76px; padding: 26px 0 44px;
  color: var(--text-faint); font-size: 13.5px;
}
footer .wrap { display: flex; gap: 16px; flex-wrap: wrap; justify-content: space-between; }

@media (max-width: 720px) {
  .hero { padding: 52px 0 26px; }
  nav.top .links { gap: 12px; }
  nav.top .links a.hide-sm { display: none; }
  .flow { grid-template-columns: 1fr; }
  .flow .wire { height: 60px; transform: rotate(90deg); width: 60px; margin: 0 auto; }
}