/* A plain shop page: warm paper in light, deep slate in dark, one green for what is paid. */
:root {
  --bg: #f6f3ee; --card: #fffdf9; --fg: #1f2421; --mut: #66706a; --line: #e2ddd3; --accent: #1f7a5c; --accent-fg: #ffffff; --warn: #9a5b12; --code: #f0ebe2;
  --ui: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14181a; --card: #1b2124; --fg: #e8ece9; --mut: #9aa6a0; --line: #2a3236; --accent: #3fbf8f; --accent-fg: #0d1512; --warn: #f0b264; --code: #11161a; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.5 var(--ui); padding-inline: 16px; padding-block: max(20px, env(safe-area-inset-top)) 32px; overflow-wrap: break-word; }
a { color: var(--accent); }
button { font: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
/* minmax(0, 1fr): the code block's longest line must not widen the column, and the page with it */
.wrap { max-width: 980px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; }

.top { display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: flex-end; justify-content: space-between; }
h1 { margin: 0; font-size: 28px; letter-spacing: -0.01em; text-wrap: balance; }
.lede { margin: 4px 0 0; color: var(--mut); max-width: 56ch; }
.state { margin: 0; font-size: 13px; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--mut); }
.state.open { color: var(--accent); border-color: var(--accent); }
.notice { margin: 0; padding: 12px 14px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); }

.products { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; display: grid; gap: 8px; align-content: start; min-width: 0; }
.card h3 { margin: 0; font-size: 18px; }
.card p { margin: 0; color: var(--mut); font-size: 14px; }
.price { font: 600 22px/1.2 var(--mono); font-variant-numeric: tabular-nums; }
.price small { font: 500 13px var(--ui); color: var(--mut); margin-left: 4px; }
.buy, .pay { appearance: none; border: 0; border-radius: 10px; padding: 11px 14px; font-weight: 700; cursor: pointer; min-height: 44px; }
.buy { background: var(--fg); color: var(--bg); }
.pay { background: var(--accent); color: var(--accent-fg); }
.buy:disabled, .pay:disabled { opacity: 0.55; cursor: progress; }
.line { min-height: 1.5em; font-size: 13.5px; color: var(--mut); }
.line.bad { color: var(--warn); }
.card.paid { border-color: var(--accent); }
.card.paid .line { color: var(--accent); font-weight: 600; }

.how, .dev { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; min-width: 0; }
h2 { margin: 0 0 8px; font-size: 16px; }
.how ol { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.dev p { margin: 0 0 10px; color: var(--mut); max-width: 70ch; }
pre { margin: 0; overflow-x: auto; background: var(--code); border-radius: 10px; padding: 12px 14px; font: 12.5px/1.55 var(--mono); }
pre code { overflow-wrap: normal; }
.foot { color: var(--mut); font-size: 13px; max-width: 72ch; }

@media (max-width: 760px) { .products { grid-template-columns: minmax(0, 1fr); } h1 { font-size: 24px; } }
@media (prefers-reduced-motion: no-preference) { .card { transition: border-color 0.3s; } }