:root {
  --ink: #101820;
  --muted: #566170;
  --paper: #e9edf1;
  --card: #ffffff;
  --line: #cfd6de;
  --accent: #1a56db;
  --ok: #0f7a56;
  --wait: #9a5a00;
  --bad: #b42318;
  --info: #4b5d70;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #eef2f6; --muted: #a2adba; --paper: #0e141b; --card: #17202a; --line: #2b3745; --accent: #6d9bff; --ok: #4cc59b; --wait: #f0b24a; --bad: #ff8a80; --info: #9fb0c3; }
}
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; font-variant-numeric: tabular-nums; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
h1, h2 { margin: 0 0 .75rem; line-height: 1.2; }
h2 { font-size: 1.05rem; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.top { display: flex; align-items: center; gap: .75rem; padding: .75rem 1rem; background: var(--card); border-bottom: 1px solid var(--line); }
.top strong { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip { font-size: .8rem; padding: .1rem .55rem; border: 1px solid var(--line); border-radius: 99px; color: var(--muted); }
.chip.live { color: var(--ok); border-color: currentColor; }
.link { background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: .25rem; }
.banner { margin: 0; padding: .6rem 1rem; background: var(--wait); color: #fff; font-weight: 600; }
@media (prefers-color-scheme: dark) { .banner { color: #1b1300; } }

main { display: grid; gap: 1rem; padding: 1rem; max-width: 980px; margin: 0 auto; }
@media (min-width: 820px) { main { grid-template-columns: minmax(300px, 380px) 1fr; align-items: start; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }

label { display: block; font-size: .9rem; color: var(--muted); margin-top: .75rem; }
input { display: block; width: 100%; margin-top: .25rem; padding: .6rem .7rem; font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 8px; }
.amount { display: flex; align-items: baseline; gap: .5rem; border-bottom: 3px solid var(--ink); padding-bottom: .25rem; }
.amount input { margin: 0; border: 0; background: none; text-align: right; font-size: clamp(2.2rem, 9vw, 3.4rem); font-weight: 700; padding: 0; }
.amount span { font-size: 1.6rem; color: var(--muted); }
details { margin-top: .75rem; }
summary { cursor: pointer; color: var(--accent); }
/* Způsob platby: tři velká přepínací tlačítka (radio), dobře trefitelná i na dotykovém displeji */
.payment { border: 0; padding: 0; margin: 1rem 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; }
.payment legend { font-size: .9rem; color: var(--muted); padding: 0; margin-bottom: .35rem; }
.payment label { margin: 0; color: var(--ink); }
.payment input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.payment span { display: block; text-align: center; padding: .7rem .25rem; border: 2px solid var(--line); border-radius: 8px; font-weight: 600; cursor: pointer; user-select: none; }
.payment input:checked + span { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); }
.payment input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: 2px; }
button.primary { width: 100%; margin-top: 1rem; padding: .85rem; font: inherit; font-weight: 700; color: #fff; background: var(--accent); border: 0; border-radius: 8px; cursor: pointer; }
@media (prefers-color-scheme: dark) { button.primary { color: #0b1220; } }
button.primary[disabled] { opacity: .6; cursor: progress; }
.msg { margin: .75rem 0 0; color: var(--muted); min-height: 1.5em; }
.msg.ok { color: var(--ok); } .msg.wait { color: var(--wait); } .msg.bad, .error { color: var(--bad); }

.login { max-width: 340px; margin: 12vh auto 0; }
.sales { list-style: none; margin: 0; padding: 0; }
.sales li { display: grid; grid-template-columns: 1fr auto; gap: .1rem .75rem; padding: .7rem 0; border-top: 1px solid var(--line); }
.sales li:first-child { border-top: 0; }
.sales .num { font-weight: 600; }
.sales .sum { text-align: right; font-weight: 700; font-size: 1.1rem; }
.sales .meta { color: var(--muted); font-size: .85rem; grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: .25rem .75rem; align-items: center; }
.state { font-weight: 600; } .state.confirmed { color: var(--ok); } .state.pending { color: var(--wait); } .state.rejected { color: var(--bad); } .state.verified { color: var(--info); }
.sig.ok { color: var(--ok); } .sig.warn { color: var(--wait); font-weight: 600; }
.sales code { font-size: .8rem; word-break: break-all; }
.sales button { font: inherit; font-size: .85rem; padding: .15rem .6rem; border: 1px solid var(--line); border-radius: 6px; background: none; color: var(--ink); cursor: pointer; }

.top { flex-wrap: wrap; }
.who { font-size: .85rem; color: var(--muted); }
select { font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: .4rem .5rem; }
.register-pick { margin: 0; }
.register-pick select { max-width: 14rem; }
.tabs { display: flex; gap: .25rem; }
.tabs button { font: inherit; font-size: .9rem; padding: .3rem .7rem; border: 1px solid var(--line); border-radius: 99px; background: none; color: var(--ink); cursor: pointer; }
.tabs button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .tabs button[aria-pressed="true"] { color: #0b1220; } }
.chip.off { color: var(--bad); border-color: currentColor; }

.settings { grid-template-columns: 1fr !important; max-width: 760px; }
h3 { font-size: .95rem; margin: 1.25rem 0 0; }
.rows { list-style: none; margin: 0; padding: 0; }
.rows li { display: grid; grid-template-columns: 1fr auto; gap: .2rem .75rem; padding: .7rem 0; border-top: 1px solid var(--line); align-items: center; }
.rows li:first-child { border-top: 0; }
.rows .num { font-weight: 600; }
.rows .meta { color: var(--muted); font-size: .85rem; grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: .35rem .75rem; align-items: center; }
.rows button, .checks button { font: inherit; font-size: .85rem; padding: .15rem .6rem; border: 1px solid var(--line); border-radius: 6px; background: none; color: var(--ink); cursor: pointer; }
.rows fieldset { grid-column: 1 / -1; }
.inline-form { border-top: 1px solid var(--line); margin-top: .75rem; }
.inline-form select { display: block; width: 100%; margin-top: .25rem; }
.checks { border: 1px solid var(--line); border-radius: 8px; margin: .75rem 0 0; padding: .5rem .75rem; }
.checks legend { font-size: .9rem; color: var(--muted); padding: 0 .25rem; }
.check { display: flex; align-items: center; gap: .4rem; margin: .25rem 0; color: var(--ink); }
.check input { width: auto; margin: 0; }

#qr-dialog { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); color: var(--ink); padding: 1.25rem; width: min(360px, calc(100vw - 32px)); text-align: center; }
#qr-dialog::backdrop { background: rgb(0 0 0 / .55); }
#qr-dialog img { display: block; margin: .5rem auto; width: min(264px, 100%); height: auto; background: #fff; padding: 8px; border-radius: 8px; image-rendering: pixelated; }
.qr-amount { font-size: 2rem; font-weight: 700; margin: 0; }
.qr-actions { display: flex; gap: .75rem; align-items: center; justify-content: space-between; margin-top: 1rem; }
.qr-actions .primary { width: auto; flex: 1; margin-top: 0; }

/* Účtenka se zobrazuje jen při tisku */
#receipt { display: none; }
@media print {
  body > *:not(#receipt) { display: none !important; }
  #receipt { display: block !important; width: 72mm; margin: 0 auto; font: 12px/1.4 ui-monospace, monospace; color: #000; background: #fff; }
  #receipt h2 { font-size: 14px; text-align: center; margin-bottom: 2px; }
  #receipt .addr { text-align: center; margin: 0 0 8px; }
  #receipt dl { margin: 0; } #receipt div { display: flex; justify-content: space-between; gap: 8px; }
  #receipt dd { margin: 0; text-align: right; word-break: break-all; }
}