:root {
  color-scheme: dark;
  --receipt-bg: #080a08;
  --receipt-panel: #111511;
  --receipt-panel-soft: #161d14;
  --receipt-line: #303a2b;
  --receipt-text: #f2f5ef;
  --receipt-muted: #adb6a8;
  --receipt-lime: #c8f135;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(ellipse at 50% -20%, rgba(200, 241, 53, .11), transparent 42rem),
    var(--receipt-bg);
  color: var(--receipt-text);
  font: 16px/1.7 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--receipt-lime); text-underline-offset: .2em; }
a:hover { color: #e4ff82; }
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--receipt-lime);
  outline-offset: 4px;
}
.receipt-skip {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 5;
  padding: .7rem 1rem;
  background: var(--receipt-lime);
  color: #10130d;
}
.receipt-skip:focus { top: 1rem; }
.receipt-header, .receipt-main, .receipt-footer {
  width: min(100% - 2rem, 1080px);
  margin-inline: auto;
}
.receipt-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid rgba(200, 241, 53, .22);
  font: 700 .78rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .08em;
}
.receipt-brand { color: var(--receipt-text); text-decoration: none; }
.receipt-header nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.receipt-header nav a { color: var(--receipt-muted); text-decoration: none; }
.receipt-header nav a:hover { color: var(--receipt-lime); }
.receipt-main { padding: clamp(2rem, 7vw, 5rem) 0 4rem; }
.receipt-hero { max-width: 850px; margin-bottom: 3rem; }
.receipt-eyebrow {
  color: var(--receipt-lime);
  font: 700 .75rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .13em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.12; }
h1 {
  margin: .7rem 0 1rem;
  max-width: 900px;
  font-size: clamp(2.5rem, 7vw, 5.6rem);
  letter-spacing: -.045em;
}
h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3.7vw, 2.5rem);
  letter-spacing: -.025em;
}
h3 { margin: 0 0 .6rem; font-size: 1.1rem; }
p { margin: .75rem 0; color: var(--receipt-muted); }
.receipt-lede { max-width: 760px; color: var(--receipt-text); font-size: clamp(1.1rem, 2vw, 1.35rem); }
.receipt-byline { margin-top: 1.25rem; font-size: .9rem; }
.receipt-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
.receipt-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: .7rem 1rem;
  border: 1px solid var(--receipt-lime);
  border-radius: 6px;
  background: var(--receipt-lime);
  color: #10130d;
  font: 800 .76rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .04em;
  text-decoration: none;
  text-transform: uppercase;
}
.receipt-button.secondary { background: transparent; color: var(--receipt-lime); }
.receipt-section { margin-top: clamp(3rem, 7vw, 5.5rem); scroll-margin-top: 1.5rem; }
.receipt-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.receipt-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.receipt-card, .receipt-callout, .receipt-faq details {
  border: 1px solid var(--receipt-line);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(200, 241, 53, .045), transparent 65%), var(--receipt-panel);
}
.receipt-card { padding: clamp(1rem, 3vw, 1.5rem); }
.receipt-card p:last-child { margin-bottom: 0; }
.receipt-callout { margin-top: 1rem; padding: 1.2rem 1.4rem; background: var(--receipt-panel-soft); }
.receipt-callout strong, .receipt-card strong { color: var(--receipt-text); }
.receipt-list { padding-left: 1.25rem; color: var(--receipt-muted); }
.receipt-list li { padding-left: .25rem; margin: .55rem 0; }
.receipt-list li::marker { color: var(--receipt-lime); }
.receipt-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .7rem;
  padding: 0;
  list-style: none;
}
.receipt-flow li {
  min-height: 150px;
  padding: 1rem;
  border: 1px solid var(--receipt-line);
  border-radius: 10px;
  background: var(--receipt-panel);
}
.receipt-flow b { display: block; margin-bottom: .5rem; color: var(--receipt-lime); font: 700 .75rem ui-monospace, monospace; }
.receipt-flow span { display: block; font-weight: 700; }
.receipt-flow small { display: block; margin-top: .5rem; color: var(--receipt-muted); font-size: .88rem; }
.receipt-table-wrap { overflow-x: auto; border: 1px solid var(--receipt-line); border-radius: 10px; }
.receipt-table { width: 100%; border-collapse: collapse; min-width: 620px; background: var(--receipt-panel); }
.receipt-table th, .receipt-table td { padding: 1rem; border-bottom: 1px solid var(--receipt-line); text-align: left; vertical-align: top; }
.receipt-table th { color: var(--receipt-lime); font: 700 .75rem ui-monospace, monospace; text-transform: uppercase; letter-spacing: .05em; }
.receipt-table td { color: var(--receipt-muted); }
.receipt-table tr:last-child td { border-bottom: 0; }
.receipt-faq { display: grid; gap: .75rem; }
.receipt-faq details { padding: 1rem 1.2rem; }
.receipt-faq summary { cursor: pointer; color: var(--receipt-text); font-weight: 700; }
.receipt-footer { padding: 1.5rem 0 3rem; border-top: 1px solid var(--receipt-line); font-size: .88rem; }
.receipt-note { font-size: .86rem; }

@media (max-width: 720px) {
  .receipt-header { align-items: flex-start; flex-direction: column; justify-content: center; padding: 1rem 0; }
  .receipt-header nav { gap: .8rem; font-size: .7rem; }
  .receipt-grid, .receipt-grid.three { grid-template-columns: 1fr; }
  .receipt-flow { grid-template-columns: 1fr 1fr; }
  .receipt-flow li { min-height: 125px; }
}
@media (max-width: 380px) {
  .receipt-flow { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}