/* Bokle — Iznik-night theme. Vertical ladder descent to "bok". */
:root{
  --ink:#0e1330;          /* deep indigo ground */
  --ink-2:#151b42;        /* raised panels */
  --ink-3:#1d2456;        /* rung wells */
  --rail:#2b336b;         /* ladder rail */
  --tile:#f2ead6;         /* warm ceramic */
  --tile-2:#e5d9bd;
  --tile-ink:#1a1f45;     /* letters on tiles */
  --turkuaz:#2dc0b6;      /* Iznik turquoise — goal / success */
  --mercan:#f0654e;       /* Iznik coral — the changed letter */
  --altin:#e8b64c;        /* gold — streaks, celebration */
  --kahve:#d69a5c;        /* warm brown — the "bok" destination accent */
  --text:#eef0ff;
  --muted:#9aa2d6;
  --danger:#f0654e;
  --font-sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SF Mono","Cascadia Mono","Roboto Mono",Menlo,monospace;
  --tile-size:clamp(38px,11.5vw,54px);
  --tile-gap:clamp(5px,1.6vw,9px);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  background:
    radial-gradient(120% 80% at 50% -10%, #1a2255 0%, var(--ink) 55%) fixed,
    var(--ink);
  color:var(--text);
  font-family:var(--font-sans);
  -webkit-font-smoothing:antialiased;
  overscroll-behavior:none;
}
button{font-family:inherit;cursor:pointer;color:inherit;border:none;background:none}
.app{
  max-width:520px;margin:0 auto;min-height:100%;
  display:flex;flex-direction:column;
  padding:env(safe-area-inset-top) 14px calc(10px + env(safe-area-inset-bottom));
}

/* ---------- top bar ---------- */
.topbar{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:8px;padding:14px 2px 10px;
}
.wordmark{
  font-weight:900;font-size:clamp(26px,7vw,34px);letter-spacing:-.03em;
  justify-self:start;line-height:1;user-select:none;
}
.wm-bok{color:var(--mercan)}
.wm-le{color:var(--tile)}
.wm-poop{font-size:.62em;margin-left:.12em;vertical-align:.15em}
.puzzle-meta{
  justify-self:center;text-align:center;font-size:12.5px;color:var(--muted);
  line-height:1.25;font-variant-numeric:tabular-nums;
}
.puzzle-meta b{color:var(--text);font-weight:700}
.topbar-actions{justify-self:end;display:flex;gap:4px}
.icon-btn{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  color:var(--muted);transition:background .15s,color .15s;
}
.icon-btn:hover{background:var(--ink-2);color:var(--text)}
.icon-btn svg{width:21px;height:21px;fill:currentColor;stroke:currentColor}
.icon-btn svg [fill="none"]{fill:none}

/* ---------- ladder stage ---------- */
.stage{
  flex:1;display:flex;flex-direction:column;align-items:center;
  padding:6px 0 10px;overflow-y:auto;min-height:0;
}
.goal{
  align-self:stretch;text-align:center;font-size:12px;color:var(--muted);
  margin-bottom:8px;min-height:16px;font-variant-numeric:tabular-nums;
}
.goal .par{color:var(--turkuaz);font-weight:700}
.goal .over{color:var(--altin);font-weight:700}
.goal .dest{color:var(--kahve);font-weight:700}

.ladder{
  position:relative;display:flex;flex-direction:column;align-items:center;
  gap:var(--tile-gap);width:100%;padding-bottom:4px;
}
/* central rail threading the rungs */
.ladder::before{
  content:"";position:absolute;top:6px;bottom:calc(var(--tile-size)/2);
  left:50%;width:3px;transform:translateX(-50%);
  background:linear-gradient(var(--rail),color-mix(in srgb,var(--rail) 30%,transparent));
  border-radius:3px;z-index:0;
}
.rung{
  position:relative;z-index:1;display:flex;gap:var(--tile-gap);
  animation:drop .34s cubic-bezier(.2,1.3,.5,1) both;
}
@keyframes drop{from{opacity:0;transform:translateY(-14px) scale(.94)}to{opacity:1;transform:none}}
.tile{
  width:var(--tile-size);height:var(--tile-size);border-radius:12px;
  display:grid;place-items:center;
  font-family:var(--font-mono);font-weight:700;
  font-size:calc(var(--tile-size)*.46);text-transform:lowercase;
  background:linear-gradient(180deg,var(--tile) 0%,var(--tile-2) 100%);
  color:var(--tile-ink);
  box-shadow:0 2px 0 rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.5);
}
@keyframes pop{0%{transform:scale(.7)}60%{transform:scale(1.12)}100%{transform:scale(1)}}
.rung.start .tile{background:linear-gradient(180deg,#c9d0ff 0%,#aab3f0 100%);color:#1a1f45}
/* a letter already in its correct bok-spot — locks in turquoise (beats start) */
.rung .tile.locked{
  background:linear-gradient(180deg,#4fe0d4 0%,var(--turkuaz) 100%);color:#04241f;
  box-shadow:0 2px 0 rgba(0,0,0,.3),0 0 0 2px rgba(45,192,182,.4);
  animation:pop .3s ease both;
}
/* the reached destination: bok — earthy poop-brown & gold (beats locked) */
.rung.done .tile{
  background:linear-gradient(180deg,#c08a4c 0%,#7c4f28 100%);color:#fff6e6;
  box-shadow:0 0 24px rgba(176,121,63,.6),0 2px 0 rgba(0,0,0,.3);
}
.rung.target.ghost .tile{
  background:transparent;color:var(--rail);
  box-shadow:inset 0 0 0 2px var(--rail);
}
.rung .rlabel{
  position:absolute;left:calc(100% + 8px);top:50%;transform:translateY(-50%);
  font-size:11px;color:var(--muted);white-space:nowrap;
}
.rung.win-flash .tile{animation:winpulse .5s ease}
@keyframes winpulse{50%{box-shadow:0 0 26px var(--altin),0 2px 0 rgba(0,0,0,.3)}}

/* ---------- dock ---------- */
.dock{position:sticky;bottom:0;padding-top:6px}
.entry{
  background:var(--ink-2);border:1px solid var(--rail);border-radius:16px;
  padding:10px 10px 8px;box-shadow:0 -6px 20px rgba(0,0,0,.25);
}
.entry-row{display:flex;align-items:center;gap:10px}
.entry-word{
  flex:1;min-height:44px;display:flex;align-items:center;gap:5px;
  font-family:var(--font-mono);font-size:26px;font-weight:700;letter-spacing:.04em;
  color:var(--tile);padding-left:6px;min-width:0;
}
.entry-word .caret{
  width:2px;height:26px;background:var(--turkuaz);border-radius:2px;
  animation:blink 1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0}}
.entry-word.invalid{color:var(--danger)}
.entry-word .ph{color:var(--muted);font-weight:400;font-size:15px;letter-spacing:0;font-family:var(--font-sans)}
.submit-btn{
  width:46px;height:44px;border-radius:12px;flex:none;
  background:linear-gradient(180deg,#3ad3c7,var(--turkuaz));color:#042420;
  font-size:22px;font-weight:800;transition:transform .1s,filter .15s;
}
.submit-btn:disabled{filter:grayscale(.6) brightness(.7);cursor:default}
.submit-btn:not(:disabled):active{transform:scale(.94)}
.entry-status{min-height:16px;font-size:12.5px;margin:4px 0 6px;padding-left:6px;color:var(--muted)}
.entry-status.ok{color:var(--turkuaz)}
.entry-status.bad{color:var(--danger)}

.trkeys{display:flex;gap:6px;flex-wrap:wrap}
.trkeys button{
  flex:1;min-width:34px;height:40px;border-radius:10px;
  background:var(--ink-3);color:var(--text);font-size:18px;font-weight:600;
  font-family:var(--font-mono);transition:background .12s,transform .08s;
}
.trkeys button:hover{background:var(--rail)}
.trkeys button:active{transform:translateY(1px)}
.trkeys .key-back{color:var(--muted);font-family:var(--font-sans)}

.actions{display:flex;gap:7px;margin-top:9px}
.act{
  flex:1;padding:11px 4px;border-radius:12px;background:var(--ink-2);
  border:1px solid var(--rail);color:var(--muted);
  font-size:12.5px;font-weight:600;
  display:flex;flex-direction:column;align-items:center;gap:3px;
  transition:background .12s,color .12s,border-color .12s;
}
.act span{font-size:16px;line-height:1}
.act:hover{color:var(--text);border-color:var(--muted)}
.act:disabled{opacity:.4;cursor:default}
.act-primary{background:var(--mercan);border-color:var(--mercan);color:#fff}
.act-primary:hover{color:#fff;background:#ff7359}

/* ---------- modals ---------- */
.modal-scrim{position:fixed;inset:0;background:rgba(6,9,26,.72);z-index:40;backdrop-filter:blur(2px)}
.modal{
  position:fixed;z-index:50;left:50%;top:50%;transform:translate(-50%,-50%);
  width:min(440px,calc(100vw - 28px));max-height:88vh;overflow-y:auto;
  background:var(--ink-2);border:1px solid var(--rail);border-radius:20px;
  padding:26px 22px 22px;box-shadow:0 24px 60px rgba(0,0,0,.5);
  animation:modalin .22s ease both;
}
@keyframes modalin{from{opacity:0;transform:translate(-50%,-46%)}to{opacity:1;transform:translate(-50%,-50%)}}
.modal h2{margin:0 0 12px;font-size:22px;letter-spacing:-.01em}
.modal p{margin:0 0 12px;line-height:1.5;font-size:14.5px;color:#d9ddff}
.modal-close{position:absolute;top:14px;right:14px;width:32px;height:32px;border-radius:9px;color:var(--muted);font-size:16px}
.modal-close:hover{background:var(--ink-3);color:var(--text)}
.rules{list-style:none;padding:0;margin:0 0 14px;display:flex;flex-direction:column;gap:9px}
.rules li{background:var(--ink-3);border-radius:11px;padding:10px 12px;font-size:14px;line-height:1.4}
.rules b{color:var(--turkuaz)}
.rules .ex{font-family:var(--font-mono);color:var(--tile);margin-left:4px}
.hl-inline{color:var(--mercan);font-weight:700}
.hl-turkuaz{color:var(--turkuaz)}
.muted{color:var(--muted)}

.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:6px}
.stat{background:var(--ink-3);border-radius:12px;padding:12px 6px;text-align:center}
.stat .n{font-size:24px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--text)}
.stat .n.streak{color:var(--altin)}
.stat .l{font-size:10.5px;color:var(--muted);margin-top:3px;line-height:1.2}
.countdown-wrap{display:flex;flex-direction:column;align-items:center;gap:2px;margin-top:16px;padding-top:14px;border-top:1px solid var(--rail)}
.countdown{font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--turkuaz);font-variant-numeric:tabular-nums}

/* win */
.modal.win{text-align:center}
.win-badge{font-size:52px;margin-bottom:4px;filter:drop-shadow(0 4px 10px rgba(0,0,0,.4))}
.modal.win h2{font-size:28px;color:var(--altin)}
.win-line{font-family:var(--font-mono);font-size:15px;color:var(--tile)!important}
.win-stats{display:flex;justify-content:center;gap:20px;margin:14px 0 18px}
.win-stats .ws{display:flex;flex-direction:column;gap:2px}
.win-stats .ws .n{font-size:26px;font-weight:800}
.win-stats .ws .l{font-size:11px;color:var(--muted)}
.win-actions{display:flex;gap:10px}
.btn-share{flex:2;padding:14px;border-radius:13px;background:linear-gradient(180deg,#3ad3c7,var(--turkuaz));color:#042420;font-weight:800;font-size:15px}
.btn-share:active{transform:scale(.98)}
.btn-ghost{flex:1;padding:14px;border-radius:13px;background:var(--ink-3);color:var(--text);font-weight:600}

/* toast */
.toast{
  position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom));
  transform:translateX(-50%) translateY(20px);
  background:var(--tile);color:var(--ink);padding:11px 18px;border-radius:12px;
  font-size:14px;font-weight:600;z-index:60;opacity:0;pointer-events:none;
  transition:opacity .2s,transform .2s;box-shadow:0 8px 24px rgba(0,0,0,.4);max-width:88vw;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.err{background:var(--mercan);color:#fff}

/* ---------- live echo of the typed word, under the current word ---------- */
.ladder-echo{
  display:flex;flex-direction:column;align-items:center;gap:4px;z-index:1;
}
.ladder-echo:empty{display:none}
.rung.preview{animation:none}
.rung.preview .tile{
  background:linear-gradient(180deg,#20285c 0%,#171d47 100%);color:var(--text);
  box-shadow:inset 0 0 0 2px var(--rail);
}
.rung.preview .tile.locked{
  background:linear-gradient(180deg,#4fe0d4 0%,var(--turkuaz) 100%);color:#04241f;
  box-shadow:inset 0 0 0 2px rgba(45,192,182,.55);
}
.rung.preview .tile.changed{
  background:linear-gradient(180deg,#3a2350 0%,#2a1a3f 100%);color:#fff;
  box-shadow:inset 0 0 0 2px var(--mercan);
}
.ladder-echo.bad .rung.preview .tile{
  background:linear-gradient(180deg,#3a1c22 0%,#2a151a 100%);color:#ffd9d2;
  box-shadow:inset 0 0 0 2px var(--danger);
}
.echo-status{font-size:12px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--muted)}
.ladder-echo.ok .echo-status{color:var(--turkuaz)}
.ladder-echo.bad .echo-status{color:var(--danger)}

/* ---------- shortest-path reveal ---------- */
.btn-link{
  display:block;width:100%;margin-top:12px;padding:6px;background:none;border:none;
  color:var(--muted);font-size:13px;font-weight:600;cursor:pointer;
  text-decoration:underline;text-underline-offset:3px;
}
.btn-link:hover{color:var(--text)}
.sol-chain{
  display:flex;flex-direction:column;align-items:center;gap:3px;margin-top:6px;
  max-height:52vh;overflow:auto;
}
.sol-word{
  font-family:var(--font-mono);font-weight:700;font-size:16px;letter-spacing:.04em;
  padding:7px 16px;border-radius:11px;min-width:92px;text-align:center;
  background:linear-gradient(180deg,var(--tile) 0%,var(--tile-2) 100%);color:var(--tile-ink);
}
.sol-word.start{background:linear-gradient(180deg,#c9d0ff,#aab3f0);color:#1a1f45}
.sol-word.done{background:linear-gradient(180deg,#c08a4c,#7c4f28);color:#fff6e6}
.sol-arrow{color:var(--muted);font-size:13px;line-height:1}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;transition-duration:.05s!important}
}
:focus-visible{outline:2px solid var(--turkuaz);outline-offset:2px}