/* QR generátor */

:root {
  --bg: #eceff3;
  --panel: #ffffff;
  --fg: #1a1d21;
  --fg-soft: #666e78;
  --line: #d8dde4;
  --brand: #1f5fbf;
  --brand-ink: #ffffff;
  --warn-bg: #fff4e0;
  --warn-line: #e0a458;
  --warn-fg: #7a4b00;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181c;
    --panel: #1e2228;
    --fg: #e8eaed;
    --fg-soft: #9aa3ad;
    --line: #333a43;
    --brand: #5b9bf5;
    --brand-ink: #0d1116;
    --warn-bg: #3a2c14;
    --warn-line: #a97b32;
    --warn-fg: #f0cf9a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 system-ui, "Segoe UI", Roboto, Arial, sans-serif;
}

.app { display: flex; min-height: 100vh; align-items: flex-start; }

/* ------------------------------------------------------------- ovládanie */

.side {
  flex: 0 0 340px;
  position: sticky;
  top: 0;
  max-height: 100vh;
  overflow-y: auto;
  padding: 18px 16px 40px;
  background: var(--panel);
  border-right: 1px solid var(--line);
}

.side-head h1 { margin: 0 0 4px; font-size: 1.15rem; }
.muted { color: var(--fg-soft); font-size: .85rem; margin: 0; }
.muted a { color: var(--brand); }
.foot { margin-top: 18px; font-size: .78rem; }

.grp { margin-top: 22px; }
.grp > h2 {
  margin: 0 0 10px;
  font-size: .78rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--fg-soft);
}

.f { display: grid; gap: 5px; margin-bottom: 12px; font-size: .82rem; color: var(--fg-soft); }
.f > span b { float: right; color: var(--fg); font-weight: 600; }
.hint { font-style: normal; font-size: .76rem; line-height: 1.45; }
.hint code { background: var(--bg); padding: 0 3px; border-radius: 3px; }

.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.row3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }

.inp {
  width: 100%;
  min-height: 38px;
  padding: 7px 9px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--fg);
  font: inherit;
  font-size: .9rem;
}

.inp:focus { outline: 2px solid var(--brand); outline-offset: -1px; border-color: var(--brand); }

.ta { resize: vertical; min-height: 96px; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .84rem; }

.col { width: 100%; height: 38px; padding: 2px; border: 1px solid var(--line); border-radius: 9px; background: var(--bg); }

input[type="range"] { width: 100%; accent-color: var(--brand); }

.chk {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: .85rem;
  color: var(--fg);
  cursor: pointer;
}

.chk input { width: 17px; height: 17px; accent-color: var(--brand); }

.btn {
  display: inline-grid;
  place-items: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--fg);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn-ghost { background: transparent; }
.btn.small { min-height: 34px; padding: 0 12px; font-size: .85rem; font-weight: 500; }
.acts { display: grid; gap: 8px; }

/* ---------------------------------------------------------------- náhľad */

.main { flex: 1; min-width: 0; }

.bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.grow { flex: 1; }
.zoom { display: flex; align-items: center; gap: 8px; }
.zoom input { width: 120px; }
#btn-side { display: none; }

.warn {
  margin: 12px 16px 0;
  padding: 10px 12px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: 10px;
  color: var(--warn-fg);
  font-size: .87rem;
}

.sheets { --scale: 1; padding: 20px 16px 60px; display: grid; justify-content: center; gap: 20px; }

.page-wrap {
  width: calc(var(--pw) * 1mm * var(--scale));
  height: calc(var(--ph) * 1mm * var(--scale));
}

.page {
  position: relative;
  overflow: hidden;
  transform: scale(var(--scale));
  transform-origin: top left;
  box-shadow: 0 2px 14px rgba(0, 0, 0, .22);
}

.card { position: absolute; }
.qrbox { position: absolute; }
.qr { display: block; width: 100%; height: 100%; }

.tl {
  position: absolute;
  text-align: center;
  white-space: pre;
  overflow: hidden;
}

/* --------------------------------------------------------------- overlay */

.busy {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, .45);
}

.busy-box {
  padding: 18px 26px;
  background: var(--panel);
  border-radius: var(--radius);
  font-weight: 600;
}

[hidden] { display: none !important; }

/* ----------------------------------------------------------- úzka obrazovka */

@media (max-width: 900px) {
  .side {
    position: fixed;
    z-index: 10;
    inset: 0 auto 0 0;
    width: 320px;
    flex: none;
    transform: translateX(-100%);
    transition: transform .2s ease;
  }
  body.side-open .side { transform: none; }
  #btn-side { display: inline-grid; }
}

/* ------------------------------------------------------------------ tlač */

@page { size: auto; margin: 0; }

@media print {
  body { background: #fff; }
  .side, .bar, .no-print, .busy { display: none !important; }
  .app { display: block; }
  .sheets { --scale: 1; display: block; padding: 0; gap: 0; }
  .page-wrap { width: auto; height: auto; }
  .page {
    transform: none;
    box-shadow: none;
    break-after: page;
    page-break-after: always;
  }
  .page:last-child { break-after: auto; page-break-after: auto; }
}