:root {
  --bg: #f4f2ee;
  --card: #ffffff;
  --ink: #1f2623;
  --muted: #66706c;
  --line: #dcd8d0;
  --accent: #2f6f5e;
  --accent-ink: #ffffff;
  --accent-soft: #e3efe9;
  --warn: #9a4a12;
  --warn-bg: #fdf0e4;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .06), 0 4px 16px rgba(0, 0, 0, .04);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151917;
    --card: #1e2421;
    --ink: #e8ebe9;
    --muted: #9aa5a0;
    --line: #333b37;
    --accent: #6cc2a6;
    --accent-ink: #0d1a15;
    --accent-soft: #23352e;
    --warn: #f4b27c;
    --warn-bg: #3a2616;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* ---------- header ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  max-width: 1200px; margin: 0 auto; padding: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand h1 { margin: 0; font-size: 1.25rem; }
.brand p { margin: 0; color: var(--muted); font-size: .85rem; }
.units { display: flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; flex: none; }
.units label { cursor: pointer; }
.units input { position: absolute; opacity: 0; pointer-events: none; }
.units span { display: block; padding: 6px 12px; font-size: .85rem; }
.units input:checked + span { background: var(--accent); color: var(--accent-ink); }
.units input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: -3px; }

/* ---------- layout ---------- */
.layout {
  display: grid; gap: 16px; max-width: 1200px; margin: 0 auto; padding: 0 16px 32px;
}
@media (min-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); align-items: start; }
  .sticky { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow: auto; }
}
.controls { display: grid; gap: 16px; min-width: 0; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 16px;
}
.card h2 { display: flex; align-items: center; gap: 8px; margin: 0 0 12px; font-size: 1.05rem; }
.card h2 small { color: var(--muted); font-weight: 400; font-size: .8rem; }
.num {
  display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); font-size: .8rem; flex: none;
}
.hint { color: var(--muted); font-size: .85rem; margin: 0 0 10px; }
.empty { color: var(--muted); font-style: italic; margin: 8px 0; }

/* ---------- form fields ---------- */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.span2 { grid-column: span 2; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: .8rem; color: var(--muted); min-width: 0; }
.field small { font-size: .75rem; }
.u { font-size: .75rem; }
input, select, button { font: inherit; color: inherit; }
input[type=number], input:not([type]), select {
  width: 100%; min-width: 0; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--ink); font-size: 1rem;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
input:disabled { opacity: .7; }
.custom-only { display: none; }
.custom-paper .custom-only { display: flex; }

.btn {
  border: 1px solid var(--line); background: var(--card); border-radius: 8px;
  padding: 9px 14px; cursor: pointer; font-weight: 600;
}
.btn.small { padding: 5px 10px; font-size: .85rem; }
.btn.ghost { background: transparent; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); padding: 11px 22px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn:hover:not(:disabled), .chip:hover { filter: brightness(.96); }
.icon-btn {
  width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--card); cursor: pointer; font-size: 1.1rem; line-height: 1; flex: none;
}
.toggle { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: .9rem; }
.toggle input { width: 18px; height: 18px; accent-color: var(--accent); }

/* ---------- frames ---------- */
.frames { display: grid; gap: 10px; margin-bottom: 12px; }
.frame {
  display: grid; align-items: end; gap: 8px;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto minmax(0, 1fr) minmax(0, .9fr) auto;
  padding-bottom: 10px; border-bottom: 1px dashed var(--line);
}
.frame .x { padding-bottom: 10px; color: var(--muted); }
.frame .icon-btn { margin-bottom: 4px; }
.frame.too-big input[data-k=w], .frame.too-big input[data-k=h] { outline: 2px solid var(--warn); outline-offset: -1px; }
.frame .too-big-note { grid-column: 1 / -1; color: var(--warn); font-size: .75rem; margin-top: -4px; }
.frame .assigned { grid-column: 1 / -1; color: var(--accent); font-size: .75rem; margin-top: -4px; }
@media (max-width: 480px) {
  .frame { grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) minmax(0, .9fr) auto; }
  .frame .name { grid-column: 1 / -1; }
}
.quick { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; margin-bottom: 12px; font-size: .85rem; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--line); background: var(--accent-soft); color: var(--ink);
  border-radius: 999px; padding: 5px 11px; cursor: pointer; font-size: .85rem;
}

/* ---------- photos ---------- */
.drop {
  display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center;
  padding: 22px 12px; border: 2px dashed var(--line); border-radius: var(--radius); cursor: pointer;
  transition: background .15s, border-color .15s;
}
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.drop strong { color: var(--accent); font-size: 1.05rem; }
.drop small { color: var(--muted); max-width: 36ch; }
.drop.over, .drop:focus-within { border-color: var(--accent); background: var(--accent-soft); }
.drop.busy { opacity: .6; cursor: progress; }
.row-opts { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin: 12px 0; flex-wrap: wrap; }
.photos { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
.photo {
  position: relative; display: grid; gap: 6px; padding: 6px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg);
}
.photo img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 6px; display: block; }
.photo .remove { position: absolute; top: 10px; right: 10px; width: 28px; height: 28px; opacity: .92; }
.photo select { padding: 6px 8px; font-size: .85rem; }
.copies { display: flex; align-items: center; justify-content: space-between; gap: 6px; font-size: .8rem; color: var(--muted); }
.copies input { width: 64px; padding: 5px 8px; font-size: .9rem; }

/* ---------- results ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.stat { background: var(--accent-soft); border-radius: 10px; padding: 10px; text-align: center; }
.stat b { display: block; font-size: 1.5rem; line-height: 1.1; }
.stat span { color: var(--muted); font-size: .8rem; }
.warn { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 8px 12px; margin: 0 0 8px; font-size: .9rem; }
.warn p { margin: 0; }
.warn-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.sheets { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.sheet { margin: 0; }
.paper { width: 100%; background: #fff; box-shadow: 0 1px 4px rgba(0, 0, 0, .25); border-radius: 2px; overflow: hidden; }
.paper > svg { display: block; width: 100%; height: 100%; }
.margin-line { fill: none; stroke: #c9d6d1; stroke-width: .4; stroke-dasharray: 2 2; }
.sheet figcaption { display: grid; gap: 2px; margin-top: 6px; font-size: .85rem; }
.room { color: var(--accent); }
.print-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: 16px 0 8px; flex-wrap: wrap; }
details { border-top: 1px solid var(--line); padding: 10px 0 0; margin-top: 10px; }
summary { cursor: pointer; font-weight: 600; font-size: .9rem; }
.tips ol { padding-left: 20px; margin: 8px 0; font-size: .9rem; }
.tips li { margin-bottom: 4px; }
.compare table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.compare th, .compare td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.compare th:not(:first-child), .compare td:not(:first-child) { text-align: right; }
.compare tbody tr { cursor: pointer; }
.compare tbody tr:hover, .compare tbody tr:focus { background: var(--accent-soft); outline: none; }
.compare tr.current td { font-weight: 700; }
.compare tr.best td:last-child { color: var(--accent); font-weight: 700; }

/* ---------- printing ---------- */
#print-root { display: none; }
@media print {
  html, body { background: #fff !important; margin: 0 !important; padding: 0 !important; }
  body > *:not(#print-root) { display: none !important; }
  #print-root { display: block; }
  .print-sheet { overflow: hidden; break-after: page; page-break-after: always; }
  .print-sheet:last-child { break-after: auto; page-break-after: auto; }
  .print-sheet > svg { display: block; }
  * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}