/* === Kana Shuffle — put the shuffled kana back on the chart =========
   Companion to js/games/shuffle.js on /games/shuffle (shuffle.html).
   Every colour is a site token (var(--…)) so it themes light/dark.
   Layout: a card (.ks) with a top bar, then the play area — the chart
   board (6-column grid: row labels + a i u e o) and the hand (deck +
   face-up card). Cell size is set from JS as --ks-cell so the whole
   chart fits; ≥640px the hand sits beside the board (.ks--side).
   Cards borrow Kana Solitaire's look (paper face, corner kana, woven
   accent back).
   ==================================================================== */

.shuffle-host { padding: 4px 0 8px; }

.ks {
  --ks-cell: 52px;
  --ks-gap: 5px;
  --ks-card-w: calc(var(--ks-cell) * 1.9);
  --ks-card-h: calc(var(--ks-card-w) * 1.4);
  --ks-wrong: #d1583a;
  --ks-ok: #2f8f5b;
  --ks-lane: #dce9f7;
  position: relative;
  /* Own stacking context: the overlays (z 40) and the dragged card (z 30)
     layer only inside the game — without this they rose above the sticky
     site header (z 30) when the page scrolled. */
  isolation: isolate;
  display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line); border-radius: 20px;
  box-shadow: var(--shadow-card, none);
  padding: 12px 14px 16px;
  overflow: hidden;
  user-select: none; -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}
html.dark .ks { --ks-wrong: #e8846a; --ks-ok: #6cc596; --ks-lane: color-mix(in srgb, var(--accent) 16%, transparent); }
.ks.gfs--fs { border-radius: 0; padding: max(10px, env(safe-area-inset-top)) 12px max(12px, env(safe-area-inset-bottom)); }

/* ── top bar ─────────────────────────────────────────────────────── */
.ks__bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.ks__scripts { display: flex; gap: 4px; padding: 4px; background: var(--inset); border: 1px solid var(--line); border-radius: 999px; }
.ks__script {
  display: inline-flex; align-items: center; gap: 6px;
  font: 600 13px var(--font-ui); color: var(--muted);
  padding: 6px 13px; border: none; border-radius: 999px; background: transparent; cursor: pointer;
}
.ks__script b { font-family: var(--font-kana-sans); font-size: 15px; }
.ks__script:hover { color: var(--accent); }
.ks__script.is-on { background: var(--accent); color: #fff; }
.ks__stats { display: flex; gap: 12px; font: 700 14px var(--font-ui); color: var(--ink); font-variant-numeric: tabular-nums; }
.ks__stat--miss { color: var(--ks-wrong); }
.ks__stat--time { color: var(--muted); min-width: 3.2em; text-align: right; }
.ks__tools { display: flex; gap: 6px; }
.ks__icon {
  width: 36px; height: 36px; border-radius: 11px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--muted); background: var(--inset); border: 1px solid var(--line);
}
.ks__icon:hover { color: var(--accent); border-color: var(--accent-line); }
.ks__icon[hidden] { display: none; }

/* ── play area ───────────────────────────────────────────────────── */
.ks__play { display: flex; flex-direction: column; align-items: center; gap: 14px; }
.ks--side .ks__play { flex-direction: row; align-items: flex-start; justify-content: center; gap: 28px; }

.ks__board {
  display: grid;
  grid-template-columns: calc(var(--ks-cell) * .55) repeat(5, var(--ks-cell));
  grid-template-rows: calc(var(--ks-cell) * .55) repeat(11, var(--ks-cell));
  gap: var(--ks-gap);
}
/* Sideways chart (short, wide screens): consonant rows across, vowels
   down. Items are positioned by JS (_placeBoard). */
.ks__board--wide {
  grid-template-columns: calc(var(--ks-cell) * .55) repeat(11, var(--ks-cell));
  grid-template-rows: calc(var(--ks-cell) * .55) repeat(5, var(--ks-cell));
}
.ks__label {
  display: flex; align-items: center; justify-content: center;
  font: 700 max(10px, calc(var(--ks-cell) * .3)) var(--font-ui); color: var(--faint);
  letter-spacing: .04em;
}
.ks__label--col { color: var(--accent); }
.ks__label--row { color: var(--accent); }

.ks__cell {
  position: relative;
  border-radius: calc(var(--ks-cell) * .18);
  border: 1.5px dashed color-mix(in srgb, var(--line) 70%, var(--muted));
  background: color-mix(in srgb, var(--inset) 70%, transparent);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .15s;
}
.ks__cell:hover:not(.is-filled):not(.ks__cell--none) { border-color: var(--accent-line); background: var(--accent-bg); }
.ks__cell.is-over {
  border: 2.5px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 28%, transparent);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 50%, transparent), 0 0 22px 4px color-mix(in srgb, var(--accent) 45%, transparent);
  transform: scale(1.1); z-index: 2;
}
/* crosshair while dragging: the target's row + column, and their labels */
.ks__cell.is-lane:not(.is-filled):not(.ks__cell--none) { background: var(--ks-lane); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.ks__label.is-hot {
  color: #fff;
  background: radial-gradient(circle at center, var(--accent) 0 max(11px, calc(var(--ks-cell) * .26)), transparent calc(max(11px, calc(var(--ks-cell) * .26)) + 1px));
}
.ks__cell--none { border: none; background: repeating-linear-gradient(45deg, color-mix(in srgb, var(--line) 35%, transparent) 0 2px, transparent 2px 7px); opacity: .5; cursor: default; }
.ks__cell.is-filled {
  cursor: default;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, color-mix(in srgb, var(--card) 82%, #fff), color-mix(in srgb, var(--card) 94%, #fff));
  box-shadow: 0 1px 1px rgba(25, 20, 15, .09), 0 2px 5px rgba(25, 20, 15, .07);
}
html.dark .ks__cell.is-filled { background: color-mix(in srgb, var(--card) 80%, #fff 6%); }
.ks__cell.is-filled.was-missed { border-color: color-mix(in srgb, var(--ks-wrong) 55%, var(--line)); }
.ks__cell-kana { font-family: var(--font-kana-sans); font-size: calc(var(--ks-cell) * .5); font-weight: 500; line-height: 1; color: var(--ink); }
.ks__cell-romaji { font: 600 max(7px, calc(var(--ks-cell) * .18)) var(--font-ui); color: var(--faint); margin-top: 2px; letter-spacing: .03em; }
.ks__cell.is-pop { animation: ksPop .35s ease-out; }
.ks__cell.is-wrong { animation: ksWrong .45s ease-out; }
.ks__cell.is-home { animation: ksHome 1.3s ease-out; }

/* ── hand ────────────────────────────────────────────────────────── */
.ks__hand { display: grid; grid-template-columns: auto auto; align-items: center; justify-items: center; gap: 10px 18px; }
.ks--compact .ks__handhint { display: none; }
.ks--side .ks__hand { grid-template-columns: auto; position: sticky; top: 12px; padding-top: calc(var(--ks-cell) * .6); }
.ks__handhint { grid-column: 1 / -1; font: 500 12px var(--font-ui); color: var(--faint); text-align: center; max-width: 220px; }
.ks__deck {
  position: relative; width: calc(var(--ks-card-w) * .78); height: calc(var(--ks-card-h) * .78);
  border-radius: 10px;
  background:
    repeating-linear-gradient(45deg, var(--accent-bg) 0 3px, transparent 3px 7px),
    color-mix(in srgb, var(--card) 86%, var(--accent));
  border: 1px solid var(--line);
  box-shadow: inset 0 0 0 3px color-mix(in srgb, var(--card) 72%, #fff),
              3px 3px 0 -1px var(--card), 3px 3px 0 0 var(--line),
              6px 6px 0 -1px var(--card), 6px 6px 0 0 var(--line);
}
.ks--side .ks__deck { order: 2; }
.ks__deck.is-empty { opacity: .25; box-shadow: none; }
.ks__deckcount {
  position: absolute; right: -8px; bottom: -8px; min-width: 26px; height: 26px; padding: 0 6px;
  border-radius: 999px; background: var(--accent); color: #fff;
  font: 700 12px var(--font-ui); display: flex; align-items: center; justify-content: center;
}
.ks__deck.is-empty .ks__deckcount { display: none; }
.ks__slot { width: var(--ks-card-w); height: var(--ks-card-h); position: relative; }

.ks__card {
  position: relative;
  width: var(--ks-card-w); height: var(--ks-card-h);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink);
  background: linear-gradient(180deg, color-mix(in srgb, var(--card) 82%, #fff), color-mix(in srgb, var(--card) 94%, #fff));
  border: 1px solid var(--line);
  box-shadow: 0 2px 3px rgba(25, 20, 15, .12), 0 8px 18px -6px rgba(25, 20, 15, .25);
}
html.dark .ks__card { background: color-mix(in srgb, var(--card) 80%, #fff 8%); box-shadow: 0 2px 3px rgba(0,0,0,.35), 0 10px 22px -8px rgba(0,0,0,.6); }
.ks__card-corner { position: absolute; top: 6px; left: 8px; font-family: var(--font-kana-sans); font-size: calc(var(--ks-card-w) * .15); font-weight: 700; opacity: .5; }
.ks__card-kana { font-family: var(--font-kana-sans); font-size: calc(var(--ks-card-w) * .55); font-weight: 500; line-height: 1; }
.ks__card--hand { cursor: grab; touch-action: none; }
.ks__card--hand.is-dragging { cursor: grabbing; z-index: 30; box-shadow: 0 16px 34px -10px rgba(25, 20, 15, .45); transition: none; }
.ks__card--hand.is-dealt { animation: ksDeal .32s ease-out; }
.ks__card--hand.is-shake { animation: ksShake .42s ease-out; border-color: var(--ks-wrong); }

/* ── overlays ────────────────────────────────────────────────────── */
.ks__overlay {
  position: absolute; inset: 0; z-index: 40;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  padding: 24px; text-align: center; overflow-y: auto;
  background: color-mix(in srgb, var(--card) 93%, transparent);
  backdrop-filter: blur(3px);
}
.ks__overlay[hidden] { display: none; }
.ks__eyebrow { font: 700 12px var(--font-ui); letter-spacing: .3em; color: var(--accent); }
.ks__startsub { font-size: 15px; line-height: 1.5; color: var(--muted); max-width: 320px; }
.ks__best, .ks__besttag { font: 600 13px var(--font-ui); color: var(--faint); min-height: 1em; }
.ks__cta {
  cursor: pointer; font: 600 15px var(--font-ui); color: #fff;
  padding: 14px 34px; border-radius: 14px; border: none; background: var(--accent);
  box-shadow: 0 12px 30px -10px var(--accent-line);
}
.ks__cta:hover { filter: brightness(1.06); }
.ks__fan { position: relative; height: 150px; width: 260px; }
.ks__card--fan {
  --ks-card-w: 76px; --ks-card-h: 106px;
  position: absolute; left: 50%; top: 18px; margin-left: -38px;
  transform: translateX(calc(var(--i) * 34px)) translateY(calc(var(--i) * var(--i) * 4px)) rotate(calc(var(--i) * 9deg));
  animation: ksFan .6s ease-out both; animation-delay: calc((var(--i) + 2) * 60ms);
}
.ks__stars { font-size: 38px; letter-spacing: 6px; color: var(--line); }
.ks__stars .is-on { color: #e0a93a; }
.ks__stats-big { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.ks__bigstat { display: flex; flex-direction: column; align-items: center; gap: 4px; min-width: 84px; padding: 10px 12px; border-radius: 14px; background: var(--inset); border: 1px solid var(--line); }
.ks__bigstat b { font: 700 20px var(--font-ui); color: var(--ink); font-variant-numeric: tabular-nums; }
.ks__bigstat small { font: 700 9px var(--font-ui); letter-spacing: .1em; text-transform: uppercase; color: var(--faint); }
.ks__btns { display: flex; gap: 10px; }
.ks__wb { font: 700 14px var(--font-ui); color: var(--accent); text-decoration: none; }
.ks__wb:hover { text-decoration: underline; }
.ks__wb[hidden] { display: none; }

/* ── keyframes ───────────────────────────────────────────────────── */
@keyframes ksDeal { from { transform: translateX(-40px) rotateY(80deg) scale(.9); opacity: .2; } to { transform: none; opacity: 1; } }
@keyframes ksShake { 0%, 100% { transform: translateX(0); } 20% { transform: translateX(-9px) rotate(-3deg); } 40% { transform: translateX(8px) rotate(2deg); } 60% { transform: translateX(-5px); } 80% { transform: translateX(3px); } }
@keyframes ksPop { 0% { transform: scale(.7); } 60% { transform: scale(1.08); } 100% { transform: scale(1); } }
@keyframes ksWrong { 0% { background: color-mix(in srgb, var(--ks-wrong) 35%, transparent); border-color: var(--ks-wrong); } 100% { } }
@keyframes ksHome { 0%, 40% { box-shadow: 0 0 0 3px var(--accent); background: var(--accent-bg); } 100% { box-shadow: 0 0 0 0 transparent; } }
@keyframes ksFan { from { opacity: 0; transform: translateY(40px) rotate(0); } }

/* Phones: one-line top bar (script buttons show just あ / ア, smaller
   icons) so the chart gets the height. */
@media (max-width: 520px) {
  .ks { padding: 10px 10px 12px; }
  .ks__bar { gap: 6px; margin-bottom: 8px; flex-wrap: nowrap; }
  .ks__script span { display: none; }
  .ks__script { padding: 5px 10px; }
  .ks__stats { gap: 8px; font-size: 13px; }
  .ks__stat--time { min-width: 2.8em; }
  .ks__tools { gap: 4px; }
  .ks__icon { width: 30px; height: 30px; border-radius: 9px; font-size: 14px; }
}
@media (max-width: 340px) {
  .ks__stats { gap: 6px; font-size: 12px; }
  .ks__stat--time { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .ks__cell.is-pop, .ks__cell.is-wrong, .ks__card--hand.is-dealt, .ks__card--fan { animation: none; }
}