:root {
  --bg: #0f1318; --panel: #161b22; --panel2: #1c232c; --line: #2a333e; --ink: #e6ebf0; --mute: #8b98a6;
  --acc: #e07a3f; --acc2: #3fa7e0; --ok: #5cc98a; --bad: #e0564a; --warn: #e0b13f;
  --r: 8px; --side: 400px;
  font: 13.5px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--ink); overflow: hidden; }
body { display: grid; grid-template-columns: var(--side) 1fr; grid-template-rows: 48px 1fr; }
button, input, select { font: inherit; color: inherit; }
a { color: var(--acc2); }
.hidden { display: none !important; }
.mute { color: var(--mute); }
.small { font-size: 12px; }

.top { grid-column: 1 / 3; display: flex; align-items: center; gap: 16px; padding: 0 14px; background: #0b0e12; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 8px; font-size: 17px; letter-spacing: .2px; }
.brand b { color: var(--acc); font-weight: 700; }
.model-title { color: var(--mute); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 32vw; }
.views { display: flex; background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.views button { background: none; border: 0; padding: 5px 14px; border-radius: 999px; cursor: pointer; color: var(--mute); }
.views button.on { background: var(--acc); color: #fff; }
.views button:disabled { opacity: .35; cursor: default; }
.spacer { flex: 1; }
button.ghost { background: none; border: 1px solid var(--line); border-radius: 50%; width: 28px; height: 28px; cursor: pointer; }

.side { overflow-y: auto; background: var(--panel); border-right: 1px solid var(--line); padding: 10px 12px 30px; }
.step { border: 1px solid var(--line); border-radius: var(--r); padding: 10px 12px 12px; margin-bottom: 10px; background: var(--panel); }
.step h2 { font-size: 14px; margin: 0 0 8px; display: flex; align-items: center; gap: 8px; letter-spacing: .3px; }
.step h2 .n { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--panel2); border: 1px solid var(--line); font-size: 11px; color: var(--acc); }
.row { display: flex; gap: 8px; align-items: end; margin-top: 8px; }
.row.two > * { flex: 1; }
.row.three > * { flex: 1; }
.row.five > * { flex: 1; min-width: 0; }
label { display: flex; flex-direction: column; gap: 3px; font-size: 11.5px; color: var(--mute); }
label.row { flex-direction: row; align-items: center; }
label input[type=checkbox] { margin: 0 4px 0 0; }
input[type=number], input[type=text], select { background: var(--panel2); border: 1px solid var(--line); border-radius: 6px; padding: 5px 7px; width: 100%; color: var(--ink); }
input[type=range] { width: 100%; accent-color: var(--acc); }
select { cursor: pointer; }
button { background: var(--panel2); border: 1px solid var(--line); border-radius: 6px; padding: 6px 12px; cursor: pointer; }
button:hover:not(:disabled) { border-color: #45525f; }
button.primary { background: var(--acc); border-color: var(--acc); color: #fff; font-weight: 600; }
button.primary:hover:not(:disabled) { filter: brightness(1.08); }
button:disabled { opacity: .45; cursor: default; }
button.small { padding: 3px 8px; font-size: 12px; }
button.link { background: none; border: 0; color: var(--acc2); padding: 0 4px; text-decoration: underline; text-underline-offset: 2px; }
button.danger { border-color: #5a2a26; color: #ffb4ab; }
button.on { border-color: var(--acc); color: var(--acc); }

.drop { display: block; border: 1.5px dashed #3a4654; border-radius: var(--r); padding: 16px; text-align: center; cursor: pointer; color: var(--ink); background: var(--panel2); transition: border-color .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--acc); background: #221d1a; }
.drop input { display: none; }
.samples { margin-top: 6px; font-size: 12px; color: var(--mute); }

.info { margin-top: 8px; background: var(--panel2); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; font-size: 12.5px; }
.info table { width: 100%; border-collapse: collapse; }
.info td, .info th { padding: 2px 4px; text-align: left; vertical-align: top; }
.info th { color: var(--mute); font-weight: 500; }
.badges { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.badge { font-size: 11px; padding: 1px 7px; border-radius: 999px; background: #232c36; border: 1px solid var(--line); }
.badge.ok { color: var(--ok); border-color: #2c5a40; }
.badge.warn { color: var(--warn); border-color: #5a4a26; }
.badge.bad { color: var(--bad); border-color: #5a2a26; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 1px 10px; }
.kv b { font-weight: 500; color: var(--mute); }
.big { font-size: 20px; font-weight: 650; }

.partlist { display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 5px; margin-top: 6px; }
.chip { display: flex; align-items: center; gap: 6px; padding: 4px 6px; border-radius: 6px; background: #1f2731; border: 1px solid var(--line); cursor: pointer; font-size: 12px; }
.chip.sel { border-color: var(--acc); }
.chip .sw { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.chip .x { margin-left: auto; font-size: 10.5px; }
.chip.bad .x { color: var(--bad); }
.chip.ok .x { color: var(--ok); }

.editor { margin-top: 8px; border-top: 1px solid var(--line); padding-top: 8px; }
.editor h3 { font-size: 12.5px; margin: 0 0 6px; color: var(--acc); font-weight: 600; }
.editor .btns { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 6px; }
.reason { font-size: 11.5px; color: var(--mute); margin-top: 4px; }

.facelist { display: flex; flex-wrap: wrap; gap: 5px; margin: 6px 0; }
.facelist button { font-size: 12px; padding: 3px 8px; }
.facelist button.sel { border-color: var(--acc); color: var(--acc); }
.mapwrap { margin-top: 6px; }
#jointMap { width: 100%; height: auto; background: #0c1015; border: 1px solid var(--line); border-radius: 6px; cursor: crosshair; touch-action: none; }
.maptools { display: flex; gap: 6px; align-items: center; margin-top: 6px; }
.maptools select { width: auto; flex: 1; min-width: 0; }
.maptools button { white-space: nowrap; }
.maptools label { flex-direction: row; align-items: center; white-space: nowrap; }
details summary { cursor: pointer; color: var(--ink); margin-top: 8px; }
details.explain ol { padding-left: 18px; margin: 6px 0 0; color: var(--mute); }
details.explain li { margin-bottom: 4px; }
.credits { padding: 6px 2px; }

.stage { position: relative; overflow: hidden; }
#viewport { position: absolute; inset: 0; }
#viewport canvas { display: block; }
.hud { position: absolute; left: 12px; top: 10px; pointer-events: none; font-size: 12px; color: var(--mute); text-shadow: 0 1px 2px #000; }
.hud .fit { font-size: 13px; padding: 3px 9px; border-radius: 999px; background: #0b0e12cc; border: 1px solid var(--line); display: inline-block; margin-bottom: 4px; pointer-events: none; }
.hud .fit.no { color: #ffb4ab; border-color: #5a2a26; }
.hud .fit.yes { color: #a7f0c4; border-color: #2c5a40; }
.legend { position: absolute; right: 12px; top: 10px; background: #0b0e12d0; border: 1px solid var(--line); border-radius: var(--r); padding: 8px 10px; font-size: 12px; max-height: 60%; overflow: auto; }
.legend div { display: flex; align-items: center; gap: 6px; }
.legend .sw { width: 10px; height: 10px; border-radius: 3px; }
.toast { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); background: #0b0e12ee; border: 1px solid var(--line); padding: 8px 14px; border-radius: 999px; font-size: 13px; max-width: 70%; }
.toast.err { border-color: #5a2a26; color: #ffb4ab; }
.busy { position: absolute; left: 50%; top: 14px; transform: translateX(-50%); background: #0b0e12ee; border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; width: min(440px, 80%); font-size: 12.5px; }
.busy .bar { height: 5px; background: #222a33; border-radius: 3px; overflow: hidden; margin-bottom: 6px; }
.busy #busyFill { height: 100%; width: 10%; background: linear-gradient(90deg, var(--acc), #f2a26e); transition: width .2s; }
.busy.indet #busyFill { width: 30% !important; animation: indet 1.2s infinite ease-in-out; }
@keyframes indet { 0% { margin-left: -30%; } 100% { margin-left: 100%; } }
.empty { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; text-align: center; padding: 40px; }
.empty h1 { font-size: 30px; margin: 0 0 10px; font-weight: 650; letter-spacing: -.3px; }
.empty p { max-width: 560px; margin: 6px auto; color: #b9c3cd; }
dialog { background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: 12px; max-width: 560px; }
dialog::backdrop { background: #0008; }
kbd { background: var(--panel2); border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; font-size: 11px; }
.filelist { margin: 6px 0 0; padding-left: 16px; }
.filelist li { margin: 2px 0; }
.ver { font-size: 12px; }
.ver td:first-child { white-space: nowrap; }
.okc { color: var(--ok); } .badc { color: var(--bad); } .warnc { color: var(--warn); }
@media (max-width: 900px) { :root { --side: 100%; } body { grid-template-columns: 1fr; grid-template-rows: 48px 50vh 1fr; } .side { grid-row: 3; } .stage { grid-row: 2; } }

/* joint fallbacks */
.settings-note { display: flex; gap: 8px; align-items: center; justify-content: flex-end; margin-top: 4px; }
.fb { margin-top: 6px; padding: 6px 8px; border: 1px solid #5a4a26; border-radius: 6px; background: #2a2418; }
.fb .head { color: var(--warn); font-weight: 600; }
.fb .why { color: #c9b98f; }
.fb .btns { margin-top: 4px; display: flex; gap: 5px; flex-wrap: wrap; }
.fblist { margin-top: 6px; display: flex; flex-direction: column; gap: 3px; }
.fbitem { cursor: pointer; text-align: left; font-size: 12px; padding: 3px 8px; border: 1px solid #5a4a26; background: #2a2418; color: var(--warn); border-radius: 6px; }
.fbitem.single { border-color: #4a4f26; }
.facelist button.warn { border-color: #5a4a26; color: var(--warn); }