/* ==========================================================================
   Kvali Arcade — shared shell for every game and tool built in-house.
   One stylesheet, no framework, no build step. Cached across the whole site,
   so a page that opts in ships almost nothing of its own.
   ========================================================================== */

:root{
  --bg:#0c0f16; --bg-2:#11151f; --panel:#151a26; --panel-2:#1b2130;
  --line:#242c3d; --line-2:#2f3950;
  --ink:#e8ecf5; --ink-2:#9aa4bb; --ink-3:#6b7488;
  --amber:#ffa62b; --amber-dim:#3a2a10;
  --cyan:#4cc9f0;  --cyan-dim:#0f2b38;
  --violet:#a888ff;--violet-dim:#241a3d;
  --green:#6fe3a6; --green-dim:#0f2e20;
  --red:#ff4d5e;   --red-dim:#331116;
  --disp:"Chakra Petch","Noto Sans Georgian",system-ui,sans-serif;
  --sans:"IBM Plex Sans","Noto Sans Georgian",system-ui,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",monospace;
  --r:12px;
  --accent:var(--amber); --accent-dim:var(--amber-dim);
}
:root[data-theme="light"]{
  --bg:#eef0f4; --bg-2:#e5e8ef; --panel:#ffffff; --panel-2:#f4f6fa;
  --line:#d8dde8; --line-2:#c3cadb;
  --ink:#111624; --ink-2:#4d5670; --ink-3:#7b839a;
  --amber:#b96a06; --amber-dim:#fbeacf;
  --cyan:#0d7ea3;  --cyan-dim:#d9eff7;
  --violet:#6a45c9;--violet-dim:#eae1fb;
  --green:#12855a; --green-dim:#daf5e8;
  --red:#c62b3c;   --red-dim:#fbe0e3;
}
/* per-page accent — set data-accent on <html> */
:root[data-accent="cyan"]  {--accent:var(--cyan);  --accent-dim:var(--cyan-dim)}
:root[data-accent="violet"]{--accent:var(--violet);--accent-dim:var(--violet-dim)}
:root[data-accent="green"] {--accent:var(--green); --accent-dim:var(--green-dim)}
:root[data-accent="red"]   {--accent:var(--red);   --accent-dim:var(--red-dim)}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;background:var(--bg);color:var(--ink);
  font-family:var(--sans);line-height:1.55;-webkit-font-smoothing:antialiased;
  overscroll-behavior:none;
}
/* soft ambient wash — one paint, no animation, cheap on weak GPUs */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(58% 46% at 18% -6%, color-mix(in srgb,var(--accent) 15%,transparent), transparent 68%),
    radial-gradient(48% 42% at 88% 4%, color-mix(in srgb,var(--cyan) 11%,transparent), transparent 70%);
}
a{color:var(--accent);text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::selection{background:var(--accent);color:#0b0e14}

/* ============================ LAYOUT ===================================== */
.ka{max-width:1080px;margin:0 auto;padding:18px 18px 56px;display:flex;flex-direction:column;gap:16px}
.ka.narrow{max-width:760px}
.ka.wide{max-width:1240px}

.ka-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.ka-back{
  display:inline-flex;align-items:center;gap:7px;flex:none;
  height:34px;padding:0 13px 0 10px;border-radius:18px;
  background:var(--panel);border:1px solid var(--line);color:var(--ink-2);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;
  transition:color .2s,border-color .2s,transform .2s;
}
.ka-back:hover{color:var(--accent);border-color:var(--accent);transform:translateX(-2px)}
.ka-back svg{width:13px;height:13px}
.ka-top h1{
  font-family:var(--disp);font-weight:700;font-size:clamp(1.15rem,3.2vw,1.6rem);
  letter-spacing:-.01em;margin:0;line-height:1.15;
}
.ka-top h1 small{
  display:block;font-family:var(--mono);font-size:10.5px;font-weight:400;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-top:2px;
}
.ka-sp{flex:1}

/* utility buttons injected by arcade.js ------------------------------------ */
.ka-util{display:flex;gap:7px;flex:none;margin-left:auto;order:99}
.ka-ib{
  width:34px;height:34px;flex:none;display:grid;place-items:center;cursor:pointer;
  background:var(--panel);border:1px solid var(--line);border-radius:9px;color:var(--ink-3);
  transition:color .2s,border-color .2s,transform .2s;
}
.ka-ib:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-1px)}
.ka-ib svg{width:16px;height:16px}
.ka-slash{opacity:0}
body.ka-muted .ka-wave{opacity:0}
body.ka-muted .ka-slash{opacity:1}
body.ka-muted .ka-ib[data-ka="sound"]{color:var(--ink-3);opacity:.6}

/* HUD chips ---------------------------------------------------------------- */
.ka-hud{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.ka-chip{
  display:flex;flex-direction:column;gap:1px;flex:none;
  padding:5px 12px;border-radius:9px;
  background:var(--panel);border:1px solid var(--line);
}
.ka-chip b{
  font-family:var(--disp);font-weight:700;font-size:1rem;line-height:1.1;
  font-variant-numeric:tabular-nums;color:var(--ink);
}
.ka-chip i{
  font-style:normal;font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);
}
.ka-chip.hi b{color:var(--accent)}
.ka-chip.beat{animation:kaBeat .4s cubic-bezier(.2,1.6,.4,1)}
@keyframes kaBeat{0%{transform:scale(1)}45%{transform:scale(1.13)}100%{transform:scale(1)}}

/* ============================ STAGE ====================================== */
.ka-stage{
  position:relative;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;
  box-shadow:0 24px 60px -34px rgba(0,0,0,.85);
}
.ka-stage.pad{padding:16px}
.ka-stage.center{display:grid;place-items:center}
.ka-cv{display:block;width:100%;height:auto;touch-action:none}
.ka-cv.pixel{image-rendering:pixelated}

/* overlay (start / paused / game over) ------------------------------------ */
.ka-ov{
  position:absolute;inset:0;z-index:20;display:grid;place-items:center;
  padding:20px;text-align:center;
  background:color-mix(in srgb,var(--bg) 82%,transparent);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  animation:kaFade .22s ease both;
}
.ka-ov[hidden]{display:none}
@keyframes kaFade{from{opacity:0}to{opacity:1}}
.ka-ov h2{
  font-family:var(--disp);font-weight:700;font-size:clamp(1.5rem,5vw,2.2rem);
  margin:0 0 8px;letter-spacing:-.015em;
}
.ka-ov h2.win{color:var(--green)}
.ka-ov h2.lose{color:var(--red)}
.ka-ov p{color:var(--ink-2);margin:0 0 16px;font-size:.92rem;max-width:38ch}
.ka-ov .big{
  font-family:var(--disp);font-weight:700;font-size:clamp(2.2rem,9vw,3.4rem);
  color:var(--accent);line-height:1;font-variant-numeric:tabular-nums;margin:0 0 4px;
}
.ka-ov-in{display:flex;flex-direction:column;align-items:center;gap:4px}

/* ============================ CONTROLS =================================== */
.ka-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:9px;cursor:pointer;
  background:var(--accent);border:1px solid var(--accent);color:#0b0e14;
  font-family:var(--disp);font-weight:700;font-size:.94rem;letter-spacing:.01em;
  transition:transform .16s,box-shadow .2s,filter .2s;
  box-shadow:0 10px 26px -12px color-mix(in srgb,var(--accent) 90%,transparent);
}
.ka-btn:hover{transform:translateY(-2px);filter:brightness(1.08)}
.ka-btn:active{transform:translateY(0)}
.ka-btn.ghost{
  background:var(--panel);color:var(--ink-2);border-color:var(--line);box-shadow:none;
}
.ka-btn.ghost:hover{color:var(--accent);border-color:var(--accent)}
.ka-btn.sm{padding:7px 14px;font-size:.84rem}
.ka-btn[disabled]{opacity:.4;pointer-events:none}
.ka-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.ka-row.center{justify-content:center}

/* segmented control -------------------------------------------------------- */
.ka-seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:3px;gap:3px}
.ka-seg button{
  border:0;background:none;cursor:pointer;border-radius:7px;padding:6px 13px;
  font-family:var(--mono);font-size:11px;letter-spacing:.07em;text-transform:uppercase;
  color:var(--ink-3);transition:color .18s,background .18s;
}
.ka-seg button:hover{color:var(--ink)}
.ka-seg button[aria-pressed="true"]{background:var(--accent);color:#0b0e14;font-weight:600}

/* d-pad for touch ---------------------------------------------------------- */
.ka-pad{display:none;gap:8px;justify-content:center;margin-top:4px;user-select:none}
.ka-pad button{
  width:58px;height:52px;border-radius:11px;cursor:pointer;
  background:var(--panel);border:1px solid var(--line);color:var(--ink-2);
  display:grid;place-items:center;font-size:1.15rem;
}
.ka-pad button:active{background:var(--accent);color:#0b0e14;border-color:var(--accent)}
.ka-pad .col{display:grid;gap:8px}
@media (hover:none) and (pointer:coarse){.ka-pad{display:flex}}
body.ka-touch .ka-pad{display:flex}

/* ============================ FORM BITS (tools) ========================== */
.ka-field{display:flex;flex-direction:column;gap:6px;min-width:0}
.ka-field > label,.ka-lbl{
  font-family:var(--mono);font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-3);
}
.ka-in,.ka-ta,.ka-sel{
  width:100%;background:var(--bg-2);border:1px solid var(--line);border-radius:9px;
  padding:10px 12px;font-size:.92rem;transition:border-color .2s,background .2s;
}
.ka-ta{font-family:var(--mono);font-size:.85rem;line-height:1.6;resize:vertical;min-height:130px}
.ka-in:focus,.ka-ta:focus,.ka-sel:focus{outline:0;border-color:var(--accent);background:var(--panel)}
.ka-sel{cursor:pointer;appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-3) 50%),linear-gradient(135deg,var(--ink-3) 50%,transparent 50%);
  background-position:calc(100% - 17px) 50%,calc(100% - 12px) 50%;
  background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:34px}
.ka-range{-webkit-appearance:none;appearance:none;width:100%;height:5px;border-radius:4px;background:var(--line-2);cursor:pointer}
.ka-range::-webkit-slider-thumb{-webkit-appearance:none;width:17px;height:17px;border-radius:50%;background:var(--accent);border:0;cursor:pointer}
.ka-range::-moz-range-thumb{width:17px;height:17px;border-radius:50%;background:var(--accent);border:0;cursor:pointer}
.ka-check{display:flex;align-items:center;gap:9px;cursor:pointer;font-size:.88rem;color:var(--ink-2)}
.ka-check input{width:16px;height:16px;accent-color:var(--accent);cursor:pointer;flex:none}
.ka-grid2{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.ka-out{
  background:var(--bg-2);border:1px solid var(--line);border-radius:9px;padding:12px 14px;
  font-family:var(--mono);font-size:.85rem;line-height:1.65;word-break:break-word;white-space:pre-wrap;
  min-height:48px;color:var(--ink);
}
.ka-out.big{font-size:1.4rem;font-weight:600;color:var(--accent);word-break:break-all}
.ka-note{color:var(--ink-3);font-size:.8rem;font-family:var(--mono);margin:0}

/* card / panel ------------------------------------------------------------- */
.ka-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.ka-card h3{font-family:var(--disp);font-weight:600;font-size:1rem;margin:0 0 12px}

/* help strip --------------------------------------------------------------- */
.ka-help{
  display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;
  color:var(--ink-3);font-size:.82rem;margin:0;
}
kbd{
  display:inline-block;padding:2px 7px;border-radius:5px;min-width:22px;text-align:center;
  background:var(--panel-2);border:1px solid var(--line-2);border-bottom-width:2px;
  font-family:var(--mono);font-size:10.5px;color:var(--ink-2);
}

/* toast -------------------------------------------------------------------- */
.ka-toast{
  position:fixed;left:50%;bottom:24px;transform:translate(-50%,16px);z-index:999;
  background:var(--panel);border:1px solid var(--accent);color:var(--ink);
  padding:9px 18px;border-radius:22px;font-family:var(--mono);font-size:12px;
  opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;
  box-shadow:0 14px 34px -14px rgba(0,0,0,.8);
}
.ka-toast.on{opacity:1;transform:translate(-50%,0)}

@media (max-width:620px){
  .ka{padding:12px 12px 44px;gap:13px}
  .ka-top{gap:9px}
  .ka-chip{padding:4px 10px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}