/* ==========================================================================
   Logica · Algoritmi e rompicapi (js/logica/algoritmi.js)
   robot, torre di Hanoi, travasi, ordina, ricerca binaria, attraversamento,
   Mastermind, gioco del 15, sequenze. Classi con prefisso al-.
   ========================================================================== */
.lg-host { --al-acc: #5e9cff; --al-water: #3e9bff; }
.al-stat { font-size: 14.5px; color: var(--ink-2); margin: 0 0 10px; }
.al-stat b { color: var(--ink); font-variant-numeric: tabular-nums; }
.al-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 10px 0; }
.al-chip { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; font-size: 13.5px; background: var(--fill-2); color: var(--ink-2); font-variant-numeric: tabular-nums; }
.al-chip.ok { background: var(--ok-fill); color: var(--ok); font-weight: 600; }
.lg-msg .btn { margin-left: 6px; vertical-align: middle; }

/* ---------- robot ---------- */
.al-rb-lv { font-size: 15px; min-width: 0; }
.al-rb { display: grid; gap: 16px; align-items: start; }
@media (min-width: 760px) { .al-rb { grid-template-columns: auto minmax(0, 1fr); } }
.al-rb-board { justify-content: flex-start; margin: 0; }
.al-rb-tip { margin: 8px 0 0; font-size: 13.5px; color: var(--ink-2); max-width: 420px; line-height: 1.45; }
.al-rb-grid {
  --cs: min(50px, calc((100vw - 48px) / var(--rc)));
  position: relative; display: grid; grid-template-columns: repeat(var(--rc), var(--cs)); grid-auto-rows: var(--cs);
  border-radius: 12px; overflow: hidden; background: var(--fill-2); box-shadow: inset 0 0 0 1px var(--stroke);
}
.al-rb-cell { display: grid; place-items: center; box-shadow: inset 0 0 0 0.5px var(--stroke); }
.al-rb-cell.wall { background: var(--fill-3, var(--fill-2)); background-image: repeating-linear-gradient(45deg, transparent 0 5px, rgba(127, 127, 127, 0.12) 5px 7px); }
.al-star { width: 64%; height: 64%; fill: #ffb020; stroke: #c77d00; stroke-width: 1; transition: transform 0.35s, opacity 0.35s; }
.al-rb-cell.got .al-star { transform: scale(1.6) rotate(40deg); opacity: 0; }
.al-rb-bot {
  position: absolute; left: 0; top: 0; width: var(--cs); height: var(--cs); pointer-events: none;
  transform: translate(calc(var(--x, 0) * var(--cs)), calc(var(--y, 0) * var(--cs)));
  transition: transform 0.26s ease-in-out;
}
.al-rb-bod { width: 100%; height: 100%; transition: transform 0.24s ease-in-out; }
.al-rb-bod svg { width: 100%; height: 100%; display: block; }
.al-bot-b { fill: var(--al-acc); }
.al-bot-e { fill: #fff; }
.al-bot-a { fill: var(--al-acc); }
.al-rb-bod.bump svg { animation: al-bump 0.35s; }
@keyframes al-bump { 0%, 100% { transform: none; } 30% { transform: translateY(-14%); } 60% { transform: translateY(4%) rotate(-8deg); } }

.al-rb-pal { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.al-pal {
  display: inline-flex; align-items: center; gap: 6px; height: 38px; padding: 0 11px 0 8px; border-radius: 12px;
  border: 1px solid var(--stroke); background: var(--fill); color: var(--ink); font: inherit; font-size: 13.5px; cursor: pointer;
}
.al-pal:hover:not(:disabled) { background: var(--fill-2); }
.al-pal:disabled { opacity: 0.45; cursor: default; }
.al-pal svg, .al-blk svg, .al-rep-h svg { width: 18px; height: 18px; }
.al-pal b, .al-blk b { font-size: 13px; }
.al-b-F { --bc: #3e9bff; } .al-b-L, .al-b-R { --bc: #a970ff; } .al-b-r { --bc: #ff9f0a; } .al-b-P { --bc: #2fb36b; }
.al-pal svg, .al-pal b { color: var(--bc); }
.al-rb-progs { display: grid; gap: 8px; }
.al-rb-prog { border-radius: 14px; padding: 8px; background: var(--fill); box-shadow: inset 0 0 0 1px var(--stroke); cursor: pointer; }
.al-rb-prog.on { box-shadow: inset 0 0 0 1.5px var(--al-acc); }
.al-rb-ph { display: flex; justify-content: space-between; font-size: 13px; color: var(--ink-3); margin: 0 2px 6px; }
.al-rb-ph b { color: var(--ink-2); }
.al-list { display: flex; flex-wrap: wrap; align-items: center; gap: 5px; min-height: 40px; padding: 3px; border-radius: 10px; }
.al-list.tgt { background: color-mix(in srgb, var(--al-acc) 10%, transparent); }
.al-caret { width: 3px; height: 26px; border-radius: 2px; background: var(--al-acc); animation: al-blink 1s steps(2) infinite; }
@keyframes al-blink { 50% { opacity: 0; } }
.al-blk {
  width: 36px; height: 36px; display: grid; place-items: center; border-radius: 10px; cursor: pointer; padding: 0;
  border: 0; color: #fff; background: var(--bc); transition: transform 0.15s, box-shadow 0.15s;
}
.al-blk:hover { filter: brightness(1.08); }
.al-rep {
  display: flex; flex-direction: column; gap: 3px; padding: 3px; border-radius: 12px;
  background: color-mix(in srgb, #ff9f0a 14%, transparent); box-shadow: inset 0 0 0 1.5px #ff9f0a; min-width: 70px;
}
.al-rep-h { display: flex; align-items: center; gap: 4px; color: #ff9f0a; padding: 0 2px; }
.al-rep-h button { border: 0; border-radius: 8px; height: 24px; padding: 0 7px; font: inherit; font-size: 13px; font-weight: 700; cursor: pointer; background: #ff9f0a; color: #1b1b1b; }
.al-rep-h .al-rep-x { background: transparent; color: var(--ink-3); font-weight: 500; margin-left: auto; }
.al-rep > .al-list { min-height: 36px; }
.al-blk.run, .al-rep.run { box-shadow: 0 0 0 3px var(--ink); transform: scale(1.1); }
.al-rb.running .al-rb-progs { pointer-events: none; }
.al-rb-go { margin: 10px 0 0; }

/* ---------- torre di Hanoi ---------- */
.al-hn { max-width: 680px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; touch-action: none; user-select: none; -webkit-user-select: none; }
.al-hn-peg {
  position: relative; height: 230px; border-radius: 14px; cursor: pointer; display: flex; align-items: flex-end; justify-content: center;
  background: var(--fill); box-shadow: inset 0 -6px 0 var(--stroke-2); padding: 0 6px 6px;
}
.al-hn-peg.sel { background: color-mix(in srgb, var(--al-acc) 12%, transparent); }
.al-hn-rod { position: absolute; left: 50%; bottom: 6px; width: 8px; height: 82%; transform: translateX(-50%); border-radius: 4px 4px 0 0; background: var(--stroke-2); }
.al-hn-stack { position: relative; width: 100%; display: flex; flex-direction: column-reverse; align-items: center; gap: 2px; }
.al-hn-disk {
  height: 22px; border-radius: 8px; display: grid; place-items: center; font-size: 12px; font-weight: 700; color: rgba(0, 0, 0, 0.6);
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.16); transition: transform 0.18s;
}
.al-hn-disk.up { transform: translateY(-16px); box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25), inset 0 -3px 0 rgba(0, 0, 0, 0.16); }

/* ---------- travasi ---------- */
.al-tv-goal { font-size: 16px; margin: 0 0 6px; color: var(--ink-2); }
.al-tv-goal b { color: var(--ink); }
.al-tv { display: flex; justify-content: center; align-items: flex-end; gap: clamp(12px, 5vw, 36px); flex-wrap: wrap; margin-top: 12px; }
.al-jug { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.al-jug-box {
  position: relative; width: clamp(64px, 20vw, 92px); border: 0; padding: 0; cursor: pointer; overflow: hidden;
  border-radius: 6px 6px 16px 16px; background: var(--fill); box-shadow: inset 0 0 0 2px var(--stroke-2);
  display: flex; align-items: flex-end; transition: transform 0.2s;
}
.al-jug.sel .al-jug-box { box-shadow: inset 0 0 0 3px var(--al-acc); transform: translateY(-8px) rotate(-4deg); }
.al-jug.hit .al-jug-box { box-shadow: inset 0 0 0 3px var(--ok); }
.al-jug-w { display: block; width: 100%; background: linear-gradient(var(--al-water), color-mix(in srgb, var(--al-water) 70%, #003)); opacity: 0.85; transition: height 0.35s ease; }
.al-jug-n { position: absolute; inset: 0; display: grid; place-items: center; font-size: 22px; font-weight: 700; color: var(--ink); text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35); }
.al-jug-cap { font-size: 13.5px; color: var(--ink-3); }
.al-jug-ops { display: flex; flex-direction: column; gap: 4px; }
.al-jug-ops .btn { height: 28px; padding: 0 10px; font-size: 12.5px; }

/* ---------- ordina ---------- */
.al-so { display: grid; grid-template-columns: repeat(var(--n), minmax(0, 1fr)); gap: 5px; height: 220px; align-items: end; }
.al-so-b {
  height: 100%; display: flex; flex-direction: column; justify-content: flex-end; align-items: stretch; gap: 4px;
  border: 0; padding: 0; background: transparent; cursor: pointer; font: inherit;
}
.al-so-bar { display: block; border-radius: 8px 8px 4px 4px; background: color-mix(in srgb, var(--al-acc) 55%, transparent); transition: height 0.25s, background 0.2s; }
.al-so-b.okp .al-so-bar { background: color-mix(in srgb, var(--ok) 60%, transparent); }
.al-so-b.sel .al-so-bar { background: #ff9f0a; transform: translateY(-6px); }
.al-so-v { font-size: 14px; font-weight: 600; color: var(--ink); text-align: center; font-variant-numeric: tabular-nums; }
.al-so-ex { color: var(--ink-2); }
.al-so-ex:empty { display: none; }

/* ---------- ricerca binaria ---------- */
.al-bn-q { font-size: 17px; margin: 4px 0 8px; }
.al-bn-g { font-size: 24px; color: var(--al-acc); font-variant-numeric: tabular-nums; }
.al-bn-in { width: 150px; }
.al-bn-bar { position: relative; height: 10px; border-radius: 5px; background: var(--fill-2); margin: 12px 0; overflow: hidden; }
.al-bn-bar span { position: absolute; top: 0; bottom: 0; background: var(--al-acc); border-radius: 5px; transition: left 0.3s, width 0.3s; }
.al-bn-hist { display: flex; flex-wrap: wrap; gap: 5px; }

/* ---------- attraversamento ---------- */
.al-at-p { flex-wrap: wrap; border-radius: 18px; }
.al-at-intro { color: var(--ink-2); font-size: 14.5px; line-height: 1.5; margin: 0 0 10px; }
.al-at { max-width: 720px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, 1fr); min-height: 260px; border-radius: 16px; overflow: hidden; }
.al-at-bank { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 10px 4px; background: color-mix(in srgb, #4caf50 14%, var(--fill)); }
.al-at-river {
  display: flex; align-items: center; justify-content: flex-start; padding: 8px 4px;
  background: color-mix(in srgb, var(--al-water) 22%, transparent);
  background-image: repeating-linear-gradient(100deg, transparent 0 18px, rgba(255, 255, 255, 0.07) 18px 22px);
}
.al-at-boat {
  display: flex; flex-direction: column; align-items: center; gap: 4px; min-width: 64px; min-height: 92px; padding: 8px 5px; justify-content: center;
  border-radius: 10px 10px 26px 26px; background: color-mix(in srgb, #a0522d 45%, var(--fill)); box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.2);
  margin-right: auto; transition: margin 0.45s ease;
}
.al-at-boat.right { margin-left: auto; margin-right: 0; }
.al-at-empty { font-size: 12px; color: var(--ink-3); }
.al-at-it {
  display: flex; flex-direction: column; align-items: center; gap: 1px; padding: 4px 6px; min-width: 58px;
  border: 1px solid var(--stroke); border-radius: 12px; background: var(--raised, var(--fill)); color: var(--ink); cursor: pointer; font: inherit;
}
.al-at-it:hover { background: var(--fill-2); }
.al-at-ic { font-size: 22px; line-height: 1.1; }
.al-at-nm { font-size: 11px; color: var(--ink-2); white-space: nowrap; }
.al-at-m .al-at-ic, .al-at-c .al-at-ic { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-size: 14px; font-weight: 800; color: #fff; }
.al-at-m .al-at-ic { background: #2f80ed; }
.al-at-c .al-at-ic { background: #e5484d; }
.al-at-go { margin-top: 12px; }

/* ---------- Mastermind ---------- */
.al-mm { max-width: 460px; }
.al-mm-rows { display: flex; flex-direction: column; gap: 5px; }
.al-mm-row { display: flex; align-items: center; gap: 10px; padding: 5px 8px; border-radius: 12px; background: var(--fill); }
.al-mm-row.cur { box-shadow: inset 0 0 0 1.5px var(--al-acc); }
.al-mm-row.sec { background: var(--ok-fill); }
.al-mm-no { width: 18px; text-align: right; font-size: 12.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.al-mm-pegs { display: flex; gap: 6px; }
.al-peg {
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-size: 13.5px; font-weight: 800;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.18), 0 0 0 1px rgba(0, 0, 0, 0.18);
}
.al-peg.empty { background: var(--fill-2); box-shadow: inset 0 0 0 1.5px var(--stroke-2); }
.al-mm-slot, .al-mm-c { border: 0; padding: 0; background: none; cursor: pointer; border-radius: 50%; }
.al-mm-c:disabled { opacity: 0.25; cursor: default; }
.al-mm-fb { display: grid; grid-template-columns: repeat(var(--fc, 2), 9px); gap: 3px; margin-left: auto; }
.al-mm-fb i { width: 9px; height: 9px; border-radius: 50%; box-shadow: inset 0 0 0 1px var(--stroke-2); }
.al-mm-fb i.b { background: var(--ink); box-shadow: none; }
.al-mm-fb i.w { background: transparent; box-shadow: inset 0 0 0 2px var(--ink); }
.al-mm-ft, .al-mm-left { font-size: 12.5px; color: var(--ink-2); min-width: 46px; text-align: right; font-variant-numeric: tabular-nums; }
.al-mm-left { margin-left: auto; color: var(--ink-3); }
.al-mm-pal { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.al-mm-pal .al-peg { width: 38px; height: 38px; font-size: 15px; }
.al-mm-act { justify-content: flex-end; }

/* ---------- gioco del 15 ---------- */
.al-15 {
  position: relative; width: min(100%, 380px); aspect-ratio: 1; border-radius: 16px; padding: 4px; box-sizing: border-box;
  background: var(--fill-2); touch-action: none; user-select: none; -webkit-user-select: none;
}
.al-15-t {
  position: absolute; left: 4px; top: 4px; width: calc((100% - 8px) / var(--n)); height: calc((100% - 8px) / var(--n));
  transform: translate(calc(var(--x) * 100%), calc(var(--y) * 100%)); transition: transform 0.13s ease-out;
  border: 3px solid transparent; background-clip: padding-box; border-radius: 12px; padding: 0; cursor: pointer;
  background-color: var(--raised, var(--fill)); color: var(--ink); font: inherit; font-weight: 700;
  font-size: calc(min(100vw - 40px, 380px) / var(--n) * 0.38);
  box-shadow: inset 0 0 0 1px var(--stroke), inset 0 -3px 0 var(--stroke);
}
.al-15-t.okp { color: var(--ok); }

/* ---------- sequenze ---------- */
.al-sq { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 4px; }
.al-sq-t {
  min-width: 48px; height: 48px; padding: 0 10px; display: grid; place-items: center; border-radius: 12px;
  background: var(--fill); box-shadow: inset 0 0 0 1px var(--stroke); font-size: 19px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.al-sq-t.q { box-shadow: inset 0 0 0 1.5px dashed var(--al-acc); color: var(--al-acc); border: 1.5px dashed var(--al-acc); box-shadow: none; }
.al-sq-t.q.ok { color: var(--ok); border-color: var(--ok); background: var(--ok-fill); }
.al-sq-t.q.ko { color: var(--ko); border-color: var(--ko); background: var(--ko-fill); }
.al-sq-in { width: 140px; }

@media (max-width: 640px) {
  .al-hn-peg { height: 190px; padding: 0 3px 6px; }
  .al-hn-disk { height: 18px; font-size: 11px; }
  .al-so { height: 180px; gap: 3px; }
  .al-so-v { font-size: 12.5px; }
  .al-at { min-height: 300px; }
  .al-at-it { min-width: 0; width: 100%; max-width: 72px; padding: 3px 2px; }
  .al-at-boat { min-width: 56px; }
  .al-mm-row { gap: 6px; padding: 5px 6px; }
  .al-peg { width: 27px; height: 27px; font-size: 12.5px; }
  .al-mm-pegs { gap: 4px; }
}