/* Shared shell for the playground experiments: flat light page, floating top bar, frosted control panels. Matches davit.cc. */
:root{
  --page:#F6F6F9; --ground:#ECECF0; --surface:#FFFFFF; --ink:#111114; --ink-2:#4A4A55; --muted:#7C7B88;
  --line:#DCDCE3; --lilac:#D0CFEE; --lilac-deep:#6A68A8; --fur:#B9B7E6;
  --sans:"Geist", "Helvetica Neue", Arial, system-ui, sans-serif;
  --mono:"Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
html{background:var(--page)}
body{background:var(--page);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow:hidden}
a{color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--lilac-deep);outline-offset:3px;border-radius:6px}

/* Top bar */
.lab-bar{position:fixed;top:0;left:0;right:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px clamp(16px,3.2vw,40px);pointer-events:none}
.lab-bar>*{pointer-events:auto}
.lab-home{display:flex;align-items:center;gap:10px;font-weight:600;font-size:20px;letter-spacing:-.03em;text-decoration:none}
.lab-home svg{width:30px;height:30px;flex:none;display:block;transition:transform .5s cubic-bezier(.34,1.56,.64,1);transform-origin:50% 80%}
.lab-home:hover svg{transform:rotate(-10deg) scale(1.08)}
.lab-crumb{font-family:var(--mono);font-size:13px;color:var(--ink-2);display:flex;align-items:center;gap:8px}
.lab-crumb b{font-weight:500;color:var(--ink)}
.lab-crumb a{text-decoration:none}
.lab-crumb a:hover{color:var(--lilac-deep)}
.lab-left{display:flex;align-items:center;gap:18px;min-width:0}
.lab-left .sep{width:1px;height:16px;background:rgba(17,17,20,.16)}

/* Buttons */
.lab-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:999px;font:500 15px var(--sans);text-decoration:none;padding:11px 18px;border:0;cursor:pointer;background:var(--ink);color:#fff;transition:transform .2s, background .2s;white-space:nowrap}
.lab-btn:hover{transform:translateY(-1px)}
.lab-btn:active{transform:translateY(0) scale(.98)}
.lab-btn.soft{background:rgba(17,17,20,.06);color:var(--ink);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.lab-btn.soft:hover{background:rgba(17,17,20,.1)}
.lab-btn.sm{padding:8px 14px;font-size:14px}

/* Frosted panel */
.lab-panel{background:rgba(255,255,255,.72);backdrop-filter:blur(16px) saturate(1.2);-webkit-backdrop-filter:blur(16px) saturate(1.2);border:1px solid rgba(17,17,20,.06);border-radius:18px;box-shadow:0 18px 40px -22px rgba(40,38,90,.28)}

/* Sliders */
.lab-field{display:flex;flex-direction:column;gap:6px;min-width:0}
.lab-field label{display:flex;justify-content:space-between;gap:10px;font-family:var(--mono);font-size:12px;color:var(--ink-2)}
.lab-field output{color:var(--ink);font-variant-numeric:tabular-nums}
input[type=range].lab-range{-webkit-appearance:none;appearance:none;width:100%;height:22px;background:transparent;margin:0;cursor:pointer;touch-action:pan-y}
.lab-range::-webkit-slider-runnable-track{height:4px;border-radius:4px;background:linear-gradient(90deg,var(--ink) var(--p,50%),rgba(17,17,20,.12) var(--p,50%))}
.lab-range::-moz-range-track{height:4px;border-radius:4px;background:rgba(17,17,20,.12)}
.lab-range::-moz-range-progress{height:4px;border-radius:4px;background:var(--ink)}
.lab-range::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;margin-top:-7px;border-radius:50%;background:var(--fur);border:2px solid var(--ink);box-shadow:0 2px 6px rgba(17,17,20,.2)}
.lab-range::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--fur);border:2px solid var(--ink)}

/* Small mono hint that floats at the bottom */
.lab-hint{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.01em}
.kbd{display:inline-block;font-family:var(--mono);font-size:11px;padding:1px 6px;border-radius:5px;background:rgba(17,17,20,.07);color:var(--ink)}

@media (max-width:640px){
  .lab-bar{padding-top:14px}
  .lab-home span{display:none}
  .lab-left{gap:12px}
  .lab-crumb{white-space:nowrap}
  .lab-bar>.lab-btn{display:none}
}
@media (prefers-reduced-motion: reduce){
  .lab-btn,.lab-home svg{transition:none}
}