:root {
  color-scheme: dark;
  --bg: #19191b;
  --panel: #212124;
  --panel-2: #262629;
  --line: #36363a;
  --line-2: #4a4a50;
  --text: #e4e4e6;
  --dim: #9a9aa0;
  --faint: #6e6e74;
  --accent: #b9b4a6;      /* muted warm gray, never a bright fill */
  --warn: #c8a27a;
  --r: 4px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
.wrap { max-width: 860px; margin: 0 auto; padding: 28px 16px 40px; }

button, select, input, textarea { font: inherit; color: inherit; }
button {
  background: var(--panel-2); border: 1px solid var(--line-2); border-radius: var(--r);
  padding: 5px 12px; cursor: pointer; font-size: 14px;
}
button:hover:not(:disabled) { border-color: #77777e; }
button:disabled { opacity: .45; cursor: default; }
button:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 1px solid var(--accent); outline-offset: 1px;
}
.link { background: none; border: none; padding: 2px 0; color: var(--dim); text-decoration: underline; text-underline-offset: 3px; }
.link:hover:not(:disabled) { color: var(--text); }
a { color: var(--accent); }

/* header */
.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; flex-wrap: wrap; margin-bottom: 22px; }
h1 { font-size: 21px; font-weight: 600; margin: 0; letter-spacing: .2px; }
.sub { margin: 2px 0 0; color: var(--dim); font-size: 14px; }
.engine { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; max-width: 340px; }
.seg { display: flex; border: 1px solid var(--line-2); border-radius: var(--r); overflow: hidden; }
.seg button { border: none; border-radius: 0; background: var(--panel); color: var(--dim); font-size: 13px; padding: 5px 11px; }
.seg button + button { border-left: 1px solid var(--line-2); }
.seg button[aria-checked="true"] { background: #34343a; color: var(--text); }
.seg.off button[aria-checked="true"] { background: var(--panel); color: var(--dim); }
.engine .link { font-size: 13px; }
.ownkey { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 12px; width: 300px; display: flex; flex-direction: column; gap: 8px; font-size: 13px; }
.ownkey label { display: flex; flex-direction: column; gap: 3px; color: var(--dim); }
.ownkey select, .ownkey input { background: var(--bg); border: 1px solid var(--line-2); border-radius: var(--r); padding: 5px 7px; font-size: 14px; }
.ownkey .row { display: flex; gap: 8px; }
.ownkey .note { margin: 0; color: var(--faint); font-size: 12px; }
.status { font-size: 12px; color: var(--dim); text-align: right; }
.status button { font-size: 12px; }

/* concept */
.conceptLabel { display: block; font-size: 13px; color: var(--dim); margin-bottom: 4px; }
textarea {
  width: 100%; resize: vertical; background: var(--panel); border: 1px solid var(--line-2); border-radius: var(--r);
  padding: 10px 12px; font-size: 18px; line-height: 1.4;
}
textarea::placeholder { color: var(--faint); }
.count { font-size: 12px; color: var(--faint); text-align: right; min-height: 18px; }

/* moves */
.moves { display: flex; flex-direction: column; gap: 10px; margin: 4px 0 8px; }
.group { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.group h2 { font-size: 11px; font-weight: 600; color: var(--dim); text-transform: uppercase; letter-spacing: .7px; margin: 0; width: 88px; flex: none; }
.group .btns { display: flex; flex-wrap: wrap; gap: 6px; flex: 1; min-width: 0; }
.group .btns button { font-size: 14px; }

.fold { margin: 6px 0 18px; font-size: 14px; }
.fold summary { cursor: pointer; color: var(--dim); font-size: 13px; width: max-content; }
.fold .anchor { color: var(--faint); margin: 8px 0 4px; }
.fold h3 { font-size: 11px; color: var(--dim); text-transform: uppercase; letter-spacing: .7px; margin: 14px 0 4px; font-weight: 600; }
.fold dl { margin: 0; }
.fold dt { font-weight: 600; margin-top: 8px; }
.fold dd { margin: 0 0 0 0; color: var(--dim); }
.fold dd .eg { color: var(--text); }

/* results */
.resultsBar { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--line); padding-top: 12px; margin-bottom: 8px; font-size: 13px; color: var(--dim); }
.switch { display: flex; gap: 6px; align-items: center; cursor: pointer; }
.switch input { accent-color: #8a8a90; }

.run { border: 1px solid var(--line); border-radius: var(--r); background: var(--panel); padding: 12px 14px; margin-bottom: 12px; }
.run .head { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; margin-bottom: 8px; }
.run .mv { font-size: 12px; font-weight: 600; color: var(--dim); text-transform: uppercase; letter-spacing: .6px; }
.run .from { font-size: 13px; color: var(--faint); overflow-wrap: anywhere; }
.run .eng { font-size: 11px; color: var(--faint); margin-left: auto; }
.run .working { color: var(--dim); font-size: 14px; }
.run .err { color: var(--warn); font-size: 14px; }
.card { border-top: 1px solid var(--line); padding: 10px 0 8px; }
.card:first-of-type { border-top: none; padding-top: 2px; }
.card .text { font-size: 17px; line-height: 1.45; overflow-wrap: anywhere; }
.card .tag { color: var(--dim); }
.card .del { color: var(--faint); text-decoration: line-through; }
.card .add { font-weight: 650; }
.card .acts { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
.card .acts button { font-size: 12px; padding: 3px 9px; background: var(--bg); }

footer { margin-top: 30px; font-size: 12px; color: var(--faint); border-top: 1px solid var(--line); padding-top: 12px; }

@media (max-width: 600px) {
  .wrap { padding-top: 18px; }
  .engine { align-items: stretch; max-width: none; width: 100%; }
  .seg button { flex: 1; }
  .ownkey { width: 100%; }
  .status { text-align: left; }
  .group h2 { width: 100%; }
  .run .eng { margin-left: 0; width: 100%; }
}

@media (max-width: 600px) { .engine .link { align-self: flex-start; } }

/* moves that take a second input (Domain transfer, Collide) */
.withField { display: inline-flex; gap: 0; flex: 1 1 260px; min-width: 0; max-width: 520px; }
.withField button { border-top-right-radius: 0; border-bottom-right-radius: 0; flex: none; }
.withField .field {
  flex: 1; min-width: 0; background: var(--bg); border: 1px solid var(--line-2); border-left: none;
  border-radius: 0 var(--r) var(--r) 0; padding: 5px 9px; font-size: 14px;
}
.withField .field::placeholder { color: var(--faint); }

/* result type switch beside the concept label */
.conceptRow { display: flex; justify-content: space-between; align-items: flex-end; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.conceptRow .conceptLabel { margin-bottom: 0; }
.run .note { font-size: 12px; color: var(--faint); margin: -2px 0 6px; }

/* length slider */
.lengthRow { display: flex; align-items: center; gap: 10px; margin: 2px 0 8px; font-size: 13px; color: var(--dim); flex-wrap: wrap; }
.lengthRow label { width: 88px; flex: none; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .7px; }
.lengthRow input[type=range] { width: 220px; max-width: 50vw; accent-color: #8a8a90; }
.lengthRow .link { font-size: 12px; }
@media (max-width: 600px) { .lengthRow label { width: auto; } .lengthRow input[type=range] { flex: 1; max-width: none; } }

/* stacking */
.stackRow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 0 0 8px; font-size: 13px; color: var(--dim); min-height: 30px; }
.stackRow .hint { flex: 1; min-width: 160px; color: var(--faint); }
.group .btns button.picked { background: #3a3a40; border-color: #9a9aa0; color: var(--text); }
#stackGo { border-color: #77777e; }