/* İki Halka (kidsVennSort). Every rule is scoped under .kp-venn-sort. The stage paints its own light paper and dark ink,
   so it reads the same in the light and the dark site theme. */
.kp-venn-sort {
  --vs-ink: #2d2a4a;
  --vs-paper: #fdfbff;
  --vs-lilac: #ece6fb;
  --vs-rim: #a897d6;
  --vs-deep: #4b3c8f;
  --vs-focus: #1f5f9e;
  --vs-blue: #2e6f95;
  --vs-gold: #8a5a00;
  /* The site paints paragraphs with --k-ink-2 (pale, for dark pages); this paper needs the dark ink instead. */
  --k-ink-2: var(--vs-ink);
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 16px;
  border-radius: 20px;
  background: var(--vs-paper);
  color: var(--vs-ink);
  color-scheme: light;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.kp-venn-sort .screen-only { display: block; }
.kp-venn-sort .print-only { display: none; }
.kp-venn-sort .kp-instruction { margin: 0 0 6px; font-size: 1.05rem; }
.kp-venn-sort .kp-howto { margin: 0 0 10px; }
.kp-venn-sort .kp-subheading { margin: 14px 0 8px; font-size: 1rem; color: var(--vs-ink); }
.kp-venn-sort .kp-rule { margin: 0 0 10px; padding: 10px 14px; border-radius: 12px; background: var(--vs-lilac); font-weight: 600; }
.kp-venn-sort .kp-intro { margin: 0 0 8px; }
.kp-venn-sort .kp-intro > summary { cursor: pointer; font-weight: 700; color: var(--vs-ink); padding: 2px 0; min-height: 44px; display: flex; align-items: center; }
.kp-venn-sort .kp-intro[open] > summary { margin-bottom: 6px; }
.kp-venn-sort .kp-levels,
.kp-venn-sort .kp-controls { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 12px; }
.kp-venn-sort button {
  min-width: 48px;
  min-height: 48px;
  padding: 10px 16px;
  border: 2px solid var(--vs-ink);
  border-radius: 14px;
  background: var(--vs-paper);
  color: var(--vs-ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
}
.kp-venn-sort button[aria-pressed="true"] { background: var(--vs-lilac); box-shadow: inset 0 0 0 2px var(--vs-deep); }
.kp-venn-sort button:disabled { opacity: .45; cursor: not-allowed; }
.kp-venn-sort button:focus-visible,
.kp-venn-sort .kp-card:focus-visible { outline: 4px solid var(--vs-focus); outline-offset: 3px; }
.kp-venn-sort .kp-work { display: grid; gap: 8px; }
.kp-venn-sort .kp-status { min-height: 2.2em; margin: 6px 0; font-weight: 700; }
.kp-venn-sort .kp-status[data-solved="true"] { color: var(--vs-deep); }
.kp-venn-sort .kp-hint:empty { display: none; }
.kp-venn-sort .kp-hint { margin: 0 0 10px; padding: 10px 12px; border-radius: 12px; background: #fff7dc; }
.kp-venn-sort .kp-trains { margin-top: 18px; padding: 14px 16px; border-radius: 16px; background: var(--vs-lilac); }
.kp-venn-sort .kp-trains p { margin: 4px 0; }
.kp-venn-sort .kp-trains h2 { margin: 0 0 6px; font-size: 1rem; }
.kp-venn-sort .kp-why { font-style: italic; }

/* Picture tray: each picture is a card. Tap or Enter chooses it; drag moves it onto a region. */
.kp-venn-sort .kp-tray {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(112px, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.kp-venn-sort .kp-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-height: 48px;
  padding: 8px;
  border: 2px solid var(--vs-ink);
  border-radius: 16px;
  background: #ffffff;
  color: var(--vs-ink);
  font-weight: 700;
  cursor: grab;
  touch-action: manipulation;
  user-select: none;
}
.kp-venn-sort .kp-card[aria-pressed="true"] { background: var(--vs-lilac); box-shadow: inset 0 0 0 3px var(--vs-deep); }
.kp-venn-sort .kp-card.kp-dragging { opacity: .5; }
.kp-venn-sort .kp-art { display: block; width: 72px; height: 72px; }
.kp-venn-sort .kp-card-name { font-size: .95rem; text-align: center; }

/* The two rings: circles at (150,130) and (250,130), radius 110, in a 400 by 340 box. */
.kp-venn-sort .kp-venn {
  position: relative;
  width: 100%;
  max-width: 600px;
  aspect-ratio: 400 / 340;
  margin: 4px auto 0;
}
.kp-venn-sort .kp-venn-art { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.kp-venn-sort .kp-outside-band { fill: #f3f0fb; stroke: var(--vs-rim); stroke-width: 2; stroke-dasharray: 8 6; }
.kp-venn-sort .kp-ring { stroke-width: 4; }
.kp-venn-sort .kp-ring-left { fill: rgba(46, 111, 149, .16); stroke: var(--vs-blue); }
.kp-venn-sort .kp-ring-right { fill: rgba(138, 90, 0, .12); stroke: var(--vs-gold); stroke-dasharray: 14 9; }
.kp-venn-sort .kp-ring-name {
  position: absolute;
  top: 0;
  margin: 0;
  font-weight: 800;
  font-size: .95rem;
  line-height: 1.2;
  pointer-events: none;
}
.kp-venn-sort .kp-ring-name[data-ring="left"] { left: 2%; }
.kp-venn-sort .kp-ring-name[data-ring="right"] { right: 2%; text-align: right; }

/* Regions. Left and right are the crescents, both is the shared lens, outside sits below the rings. */
.kp-venn-sort .kp-zone {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 4px;
  min-height: 48px;
  margin: 0;
  padding: 4px 2px;
  border: 2px dashed transparent;
  border-radius: 16px;
  background: transparent;
  color: var(--vs-ink);
  font-weight: 700;
  text-align: center;
}
.kp-venn-sort .kp-zone[data-region="left"] { left: 7.5%; top: 20%; width: 29.5%; height: 52%; justify-content: center; }
.kp-venn-sort .kp-zone[data-region="both"] { left: 37%; top: 26%; width: 26%; height: 42%; }
.kp-venn-sort .kp-zone[data-region="right"] { left: 63%; top: 20%; width: 29.5%; height: 52%; justify-content: center; }
.kp-venn-sort .kp-zone[data-region="outside"] { left: 0; top: 74%; width: 100%; height: 26%; justify-content: center; }
.kp-venn-sort .kp-zone:not(:disabled):hover,
.kp-venn-sort .kp-zone[data-over="true"] { border-color: var(--vs-deep); background: rgba(236, 230, 251, .75); }
.kp-venn-sort .kp-zone:disabled { opacity: 1; cursor: default; }
.kp-venn-sort .kp-zone-label { max-width: 100%; font-size: .85rem; line-height: 1.2; text-wrap: balance; }
.kp-venn-sort .kp-zone-items { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px; }
.kp-venn-sort .kp-mini { display: block; }
.kp-venn-sort .kp-zone .kp-art { width: 36px; height: 36px; }

.kp-venn-sort .kp-number {
  position: absolute;
  left: 6px;
  top: 6px;
  display: grid;
  place-items: center;
  min-width: 28px;
  height: 28px;
  border-radius: 999px;
  background: var(--vs-ink);
  color: #ffffff;
  font-weight: 800;
  font-size: .9rem;
}

@media (min-width: 700px) {
  .kp-venn-sort .kp-zone .kp-art { width: 44px; height: 44px; }
  .kp-venn-sort .kp-zone-label { max-width: 66%; font-size: .95rem; }
}

/* 320 px phones: two pictures side by side in the shared part must stay inside its outline. */
@media (max-width: 359px) {
  .kp-venn-sort .kp-zone .kp-art { width: 30px; height: 30px; }
}
/* Below 400 px the outside zone is only 57 px tall; without its top and bottom padding the pictures stay inside it. */
@media (max-width: 399px) {
  .kp-venn-sort .kp-zone[data-region="outside"] { padding-top: 0; padding-bottom: 0; }
}

/* Desktop: the picture tray sits beside the board, so the whole board and the tray fit one 1280 by 800 screen. */
@media (min-width: 900px) {
  .kp-venn-sort .kp-work { grid-template-columns: 300px minmax(0, 1fr); align-items: start; column-gap: 24px; }
  .kp-venn-sort .kp-venn { max-width: 448px; margin: 4px 0 0; justify-self: center; }
}

@media print {
  .kp-venn-sort { background: #ffffff; color: #000000; box-shadow: none; padding: 0; }
  .kp-venn-sort .screen-only { display: none; }
  .kp-venn-sort .print-only { display: block; color: #000000; }
  .kp-venn-sort .print-only button { display: none; }
  .kp-venn-sort .kp-venn { max-width: 520px; }
  .kp-venn-sort .kp-zone { border-color: #000000; }
  .kp-venn-sort .kp-card { border-color: #000000; background: #ffffff; break-inside: avoid; }
  .kp-venn-sort .kp-number { background: #000000; }
}
@media (prefers-reduced-motion: reduce) {
  .kp-venn-sort * { transition: none !important; animation: none !important; }
}