/* summa-cut — wizualny system "warsztat impozytora"
   Spokojna paleta chłodnej grafitu + zielony nóż (akcja) + niebieska rejestracja.
   Liczby pisane monospace = przyrząd pomiarowy. Bez frameworków, jeden plik. */

:root {
  --ink:        #16202c;
  --ink-soft:   #4a5663;
  --ink-faint:  #8995a3;
  --paper:      #eef1f5;
  --surface:    #ffffff;
  --surface-2:  #f7f9fb;
  --line:       #d4dbe3;
  --line-soft:  #e4e9ef;
  --brand:      #1f9d6b;
  --brand-dark: #18815a;
  --brand-tint: #e7f5ee;
  --accent:     #2563eb;
  --accent-tint:#eaf0ff;
  --danger:     #c0362c;
  --danger-tint:#fcebe9;
  --ok:         #1f9d6b;

  --radius:     10px;
  --radius-sm:  7px;
  --shadow:     0 1px 2px rgba(22,32,44,.05), 0 4px 14px rgba(22,32,44,.06);
  --ring:       0 0 0 3px rgba(37,99,235,.35);

  --mono: ui-monospace, "DejaVu Sans Mono", "SFMono-Regular", "Liberation Mono", Menlo, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Liberation Sans", sans-serif;
}

* { box-sizing: border-box; }
/* atrybut [hidden] musi wygrywać z regułami display klas (np. .segmented na #view-switch) */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font: 14px/1.5 var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 100% -10%, #f4f7fb 0%, transparent 60%),
    var(--paper);
  min-height: 100vh;
}

/* ---------- Header ---------- */
header {
  padding: 14px 22px;
  background: linear-gradient(180deg, #1b2632 0%, #16202c 100%);
  color: #fff;
  border-bottom: 1px solid #0d141c;
}
header h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -.01em;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
header h1::before {
  content: "";
  width: 9px; height: 18px;
  border-radius: 2px;
  background: var(--brand);
  box-shadow: 0 0 0 1px rgba(255,255,255,.12) inset;
  align-self: center;
}
.muted { color: var(--ink-faint); font-weight: 400; }
header .muted { color: #93a1b1; font-size: 13px; letter-spacing: 0; }

/* ---------- Layout ---------- */
main {
  display: grid;
  grid-template-columns: minmax(340px, 380px) 1fr;
  gap: 18px;
  padding: 18px;
  align-items: start;
  max-width: 1500px;
  margin: 0 auto;
}

/* ---------- Control cards ---------- */
.controls { min-width: 0; }
.controls fieldset {
  position: relative;
  margin: 0 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 14px 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.controls fieldset::before {
  content: "";
  position: absolute; inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(90deg, var(--line-soft), transparent 70%);
}
.controls fieldset.special::before {
  background: linear-gradient(90deg, var(--brand) 0%, var(--brand-tint) 60%, transparent);
}
.controls legend {
  font-weight: 650;
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0 6px;
  margin-left: -4px;
}

.controls label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 4px 10px 4px 0;
  color: var(--ink-soft);
}
.controls label:has(> input[type=checkbox]),
.controls label:has(> input[type=radio]) {
  color: var(--ink);
  cursor: pointer;
}

/* ---------- Form controls ---------- */
input[type=number],
input[type=text],
select {
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  transition: border-color .12s ease, box-shadow .12s ease;
}
input[type=number] {
  font-family: var(--mono);
  font-size: 13px;
  text-align: right;
  width: 74px;
}
input[type=text] { width: 150px; }
select { min-width: 96px; background: var(--surface-2); }

input[type=number]:hover,
input[type=text]:hover,
select:hover { border-color: #b9c3cf; }

input:focus-visible,
select:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--ring);
}

input[type=checkbox],
input[type=radio] {
  width: 16px; height: 16px;
  accent-color: var(--brand);
  cursor: pointer;
}

input:disabled,
select:disabled,
label:has(> input:disabled) { color: var(--ink-faint); }
input:disabled, select:disabled { background: var(--surface-2); cursor: not-allowed; opacity: .7; }

/* ---------- Buttons ---------- */
button {
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  transition: background .12s ease, border-color .12s ease, box-shadow .12s ease, transform .04s ease;
}
button:hover { background: var(--surface-2); border-color: #b9c3cf; }
button:active { transform: translateY(1px); }
button:disabled { opacity: .55; cursor: not-allowed; transform: none; }

#generate-btn {
  width: 100%;
  margin-top: 2px;
  background: var(--brand);
  color: #fff;
  border-color: var(--brand-dark);
  font-weight: 650;
  padding: 10px 16px;
  box-shadow: 0 1px 0 rgba(0,0,0,.05), 0 6px 16px rgba(31,157,107,.22);
}
#generate-btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); }

#upload-btn,
#montage-add,
#special-prepare-btn { margin-top: 6px; }
#montage-add { background: var(--surface-2); }

/* ---------- Uploads ---------- */
.uploads {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.uploads:empty { display: none; }
.uploads li {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-soft);
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 5px 9px;
  word-break: break-all;
}

.hint { color: var(--ink-faint); font-size: 12.5px; line-height: 1.45; margin: 8px 0 0; }
.hint em { font-style: normal; font-family: var(--mono); color: var(--ink-soft); }

/* ---------- Montage rows ---------- */
.montage-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  border-top: 1px dashed var(--line);
  padding: 8px 0 4px;
  margin-top: 4px;
}
.montage-row input[type=number] { width: 60px; }
.montage-row select { min-width: 80px; }

/* ---------- Preview panel (right) ---------- */
.preview {
  position: sticky;
  top: 18px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.summary {
  background: var(--accent-tint);
  border: 1px solid #cdd9f7;
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 10px 12px;
  color: #1d3a78;
  font-size: 13.5px;
}
.error {
  background: var(--danger-tint);
  border: 1px solid #f0c4bf;
  border-left: 3px solid var(--danger);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-weight: 500;
}

/* ---------- Segmented controls ---------- */
.segmented {
  display: inline-flex;
  align-self: flex-start;
  padding: 3px;
  gap: 2px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: var(--shadow);
}
#preview-toggle { margin-bottom: 8px; }
.seg-btn {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  padding: 6px 16px;
  border-radius: 6px;
  font-weight: 550;
  box-shadow: none;
}
.seg-btn:hover { background: var(--surface-2); color: var(--ink); }
.seg-btn.active {
  background: var(--accent);
  color: #fff;
}
.seg-btn.active:hover { background: var(--accent); color: #fff; }
.seg-btn:active { transform: none; }
.seg-btn:focus-visible { box-shadow: var(--ring); }

/* ---------- 3×3 editor ---------- */
.special-editor-wrap {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow);
}
#special-editor {
  width: 100%;
  height: min(70vh, 620px);
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background:
    repeating-conic-gradient(#eef2f6 0% 25%, #e2e8ef 0% 50%) 0 / 20px 20px;
  touch-action: none;
  outline: none;
  transition: box-shadow .12s ease, border-color .12s ease;
}
#special-editor:focus-visible {
  border-color: var(--accent);
  box-shadow: var(--ring);
}
#special-editor .tile { cursor: grab; }
#special-editor .tile:active { cursor: grabbing; }

.special-legend {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 10px 2px 2px;
}
.special-legend b { color: var(--ink); font-weight: 650; }

.special-status {
  margin-left: .5rem;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ok);
}
.special-status.err { color: var(--danger); }

#special-body[hidden] { display: none; }
#special-body {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

/* ---------- Manual offsets ---------- */
.special-offsets {
  margin-top: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 12px;
  box-shadow: var(--shadow);
}
.special-offsets summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  color: var(--accent);
  padding: 8px 2px;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.special-offsets summary::-webkit-details-marker { display: none; }
.special-offsets summary::before {
  content: "▸";
  font-size: 11px;
  color: var(--ink-faint);
  transition: transform .12s ease;
}
.special-offsets[open] summary::before { transform: rotate(90deg); }
.special-offsets[open] { padding-bottom: 12px; }
.special-offsets label {
  display: inline-flex;
  justify-content: space-between;
  width: 9.5rem;
  color: var(--ink-soft);
  margin: 4px 10px 4px 0;
}

/* ---------- Preview image ---------- */
.preview-block {
  background:
    repeating-conic-gradient(#f4f6f9 0% 25%, #eaeef3 0% 50%) 0 / 16px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow);
}
#preview-img {
  width: 100%;
  max-height: calc(100vh - 200px);
  min-height: 120px;
  object-fit: contain;
  display: block;
  background: var(--surface);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 3px rgba(22,32,44,.08);
}

/* ---------- Responsive: stack on narrow screens ---------- */
@media (max-width: 880px) {
  main { grid-template-columns: 1fr; }
  .preview { position: static; }
  #special-editor { height: min(60vh, 520px); }
  #preview-img { max-height: 70vh; }
}

/* ---------- Motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}