:root {
  --bg: #fbf7f0; --surface: #ffffff; --ink: #1f2430; --muted: #5d6470; --line: #ddd6cb;
  --brand: #1f2a44; --accent: #c8102e; --ok: #1e7a3a; --warn: #a15c00; --bad: #c8102e; --input: #fff4d6;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161b; --surface: #1d2027; --ink: #e8e9ec; --muted: #a3a8b2; --line: #333844;
    --brand: #c9d3ec; --accent: #ff5b6e; --ok: #5ccf7f; --warn: #f0b35a; --bad: #ff6b7a; --input: #2b2a22;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
.btn-primary, a.btn-primary { color: #fff; }
main, header, footer { max-width: 860px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 24px; }
header nav a { display: inline-block; padding: 12px 0; margin-right: 16px; color: var(--muted); text-decoration: none; font-size: 14px; }
header nav a:hover { color: var(--ink); }
h1 { font-size: clamp(26px, 5vw, 38px); line-height: 1.2; margin: 16px 0 8px; color: var(--brand); }
h2 { font-size: 22px; margin: 32px 0 8px; color: var(--brand); }
.lede { color: var(--muted); font-size: 18px; margin: 0 0 24px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; margin: 16px 0; }
label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 4px; }
input, select { width: 100%; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--input); color: var(--ink); font: inherit; }
.row { display: grid; grid-template-columns: 1.1fr 1.6fr 1.2fr 1fr auto; gap: 8px; align-items: end; margin-bottom: 8px; }
.row button { padding: 10px 12px; }
@media (max-width: 640px) {
  .row { grid-template-columns: 1fr 1fr; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
  .row .store { grid-column: span 2; }
  .row .x { grid-column: span 2; justify-self: end; min-height: 44px; min-width: 44px; }
  .hide-sm { display: none; }
  table { font-size: 14px; }
}
button, .btn { display: inline-block; border: 0; border-radius: 8px; padding: 12px 18px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-disabled { background: var(--line); color: var(--muted); cursor: default; }
.btn-ghost { background: transparent; color: var(--brand); border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 13px; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.ok { color: var(--ok); font-weight: 600; } .warn { color: var(--warn); font-weight: 600; } .bad { color: var(--bad); font-weight: 600; }
.total { font-size: 28px; font-weight: 700; color: var(--brand); }
.note { font-size: 14px; color: var(--muted); }
.table-wrap { overflow-x: auto; }
ol li, ul li { margin: 6px 0; }
.cta { border-left: 4px solid var(--accent); }
footer { padding: 32px 16px 48px; font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); display: inline-block; padding: 8px 0; }