:root{
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);

  --felt:#14271d;
  --felt-up:#1c3427;
  --felt-line:#2c4a38;
  --felt-deep:#101f18;
  --stock:#dcd3c0;
  --brass:#c9a227;
  --ink:#efe9da;
  --muted:#8ca391;
  --warn:#d2703f;
}
:root:not([data-theme="light"]){color-scheme:dark}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--felt:#14271d}}
:root[data-theme="dark"]{--felt:#14271d}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*,*::before,*::after{box-sizing:inherit}

body{
  margin:0;
  background:var(--felt);
  background-image:radial-gradient(ellipse 120% 80% at 50% -10%,#1d3627 0%,#14271d 62%);
  color:var(--ink);
  font-family:"IBM Plex Sans KR",system-ui,sans-serif;
  font-weight:300;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

.wrap{max-width:1240px;margin:0 auto;padding:28px 20px 64px}
.wrap.narrow{max-width:860px}

a{color:var(--brass);text-underline-offset:3px}
a:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:2px}

h1{
  font-family:"Gowun Batang",serif;font-weight:700;
  font-size:clamp(1.75rem,4.2vw,2.6rem);line-height:1.18;
  letter-spacing:-.01em;margin:0 0 .35em;
}
h2{
  font-family:"Gowun Batang",serif;font-size:1.05rem;font-weight:700;
  margin:0 0 16px;padding-bottom:9px;border-bottom:1px solid var(--felt-line);
}
h3{font-family:"Gowun Batang",serif;font-size:1rem;font-weight:700;margin:0 0 6px}
.sub{color:var(--muted);font-size:.94rem;max-width:64ch;margin:0}
header{margin-bottom:26px}

.panel{background:var(--felt-up);border:1px solid var(--felt-line);border-radius:3px;padding:20px}
.note{color:var(--muted);font-size:.78rem;line-height:1.5;margin:7px 0 0}

.field{margin-bottom:17px}
.field:last-child{margin-bottom:0}
.flabel{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:5px}
.flabel span:first-child{font-size:.88rem;font-weight:400}
.val{font-family:"IBM Plex Mono",monospace;font-size:.88rem;color:var(--brass);font-variant-numeric:tabular-nums}

input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:20px;background:transparent;cursor:pointer;margin:0}
input[type=range]::-webkit-slider-runnable-track{height:2px;background:var(--felt-line)}
input[type=range]::-moz-range-track{height:2px;background:var(--felt-line)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;background:var(--brass);margin-top:-6.5px;border:none}
input[type=range]::-moz-range-thumb{width:15px;height:15px;border-radius:50%;background:var(--brass);border:none}
input[type=range]:focus-visible{outline:2px solid var(--brass);outline-offset:4px;border-radius:2px}

.check{display:flex;align-items:center;gap:9px;font-size:.88rem;cursor:pointer;padding:3px 0}
.check input{accent-color:var(--brass);width:15px;height:15px;cursor:pointer}

input[type=text]{
  width:100%;padding:8px 10px;background:var(--felt-deep);border:1px solid var(--felt-line);
  border-radius:2px;color:var(--ink);font-family:"IBM Plex Mono",monospace;font-size:.74rem;
}
input[type=text]:focus-visible{outline:2px solid var(--brass);outline-offset:1px}

button{
  font-family:inherit;font-size:.86rem;font-weight:400;padding:10px 17px;
  border-radius:2px;cursor:pointer;background:var(--brass);color:#1a1405;
  border:1px solid var(--brass);transition:background .12s ease;
}
button.ghost{background:transparent;color:var(--ink);border-color:var(--felt-line)}
button:hover{background:#dbb432}
button.ghost:hover{background:var(--felt-line)}
button:focus-visible{outline:2px solid var(--brass);outline-offset:3px}

.actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}

pre{
  margin:14px 0 0;padding:14px;background:var(--felt-deep);border:1px solid var(--felt-line);
  border-radius:2px;overflow-x:auto;font-family:"IBM Plex Mono",monospace;
  font-size:.74rem;line-height:1.55;color:var(--muted);max-height:290px;
}

.alerts{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.alert{
  font-size:.82rem;line-height:1.5;padding:10px 13px;border-radius:2px;
  background:rgba(210,112,63,.12);border-left:2px solid var(--warn);color:#f0cdb6;
}

.toast{
  position:fixed;left:50%;transform:translateX(-50%);
  bottom:calc(22px + env(safe-area-inset-bottom,0px));
  background:var(--brass);color:#1a1405;padding:10px 20px;border-radius:2px;
  font-size:.85rem;opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:50;
}
.toast.on{opacity:1}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}