:root {
  --paper: #ffffff; --ink: #0a0a0a; --mut: #6b6b6b; --line: #e6e6e6;
  --scar: #ef4444; --wash: #f6f6f6;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}
[data-theme="dark"] {
  --paper: #131416; --ink: #ece9e2; --mut: #8f8b82; --line: #2a2c2f;
  --scar: #f25555; --wash: #1a1c1e;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); line-height: 1.6; letter-spacing: 0.15px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--ink); }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }
.topbar { border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--paper); z-index: 10; }
.topbar-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand a { display: flex; align-items: center; gap: 8px; font-weight: 700; text-decoration: none; letter-spacing: 0.4px; }
.brand .logo { color: var(--scar); }
main { padding: 48px 0 80px; }
h1 { font-size: clamp(28px, 4vw, 40px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 32px 0 12px; }
.lede { color: var(--mut); font-size: 17px; margin: 0 0 24px; }
.kicker { font-size: 12px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--ink); margin: 0 0 8px; }
.kicker::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--scar); margin-right: 12px; vertical-align: 1px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 24px; margin: 16px 0; }
.card.sel { border-color: var(--scar); box-shadow: 0 0 0 1px var(--scar) inset; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink);
  padding: 12px 22px; border-radius: 6px; font: inherit; font-weight: 600;
  cursor: pointer; text-decoration: none; transition: 0.15s;
}
.btn.primary { background: var(--ink); color: var(--paper); border-color: var(--ink); box-shadow: 4px 4px 0 var(--scar); }
.btn.primary:hover { background: var(--scar); border-color: var(--scar); box-shadow: 6px 6px 0 var(--ink); transform: translate(-2px,-2px); }
.btn:hover { border-color: var(--scar); color: var(--scar); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; transform: none; }
.btnrow { display: flex; gap: 12px; flex-wrap: wrap; margin: 16px 0; }
label { display: block; margin: 16px 0; }
label span { display: block; font-size: 13px; font-weight: 600; color: var(--mut); margin-bottom: 6px; }
input, select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--paper); color: var(--ink); font: inherit;
}
input:focus, select:focus { outline: 2px solid var(--scar); outline-offset: 1px; }
code, .mono { font-family: var(--mono); font-size: 0.9em; }
pre { background: var(--ink); color: var(--paper); padding: 16px; border-radius: 6px; overflow-x: auto; font-family: var(--mono); font-size: 13px; }
.note { color: var(--mut); font-size: 14px; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: 0.4px; }
.pill.ok { background: var(--scar); color: #fff; }
.pill.mut { background: var(--wash); color: var(--mut); border: 1px solid var(--line); }
.qr { display: flex; justify-content: center; padding: 20px; background: #fff; border-radius: 8px; margin: 16px 0; }
.qr img, .qr canvas { image-rendering: pixelated; width: 240px; height: 240px; }
.profile { display: flex; align-items: center; gap: 10px; }
.profile img { width: 30px; height: 30px; border-radius: 50%; }
.profile .name { font-size: 14px; font-weight: 600; }
.hidden { display: none !important; }
.err { color: var(--scar); font-size: 14px; margin: 8px 0; }
.amt { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; }
footer { border-top: 1px solid var(--line); padding: 24px 0; color: var(--mut); font-size: 13px; }

/* Subtle back link at top of account/checkout/redeem pages */
.backbar { max-width: 720px; margin: 0 auto; padding: 10px 24px 0; }
.backbar + main { padding-top: 16px; }
.backlink { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; text-decoration: none;
  color: var(--mut); padding: 4px 0; }
.backlink:hover { color: var(--scar); }