:root {
  color-scheme: dark;
  --bg: #080809;
  --panel: rgba(25, 25, 28, 0.92);
  --panel-2: rgba(36, 36, 40, 0.92);
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.22);
  --text: #f7f7f8;
  --muted: #a9a9b2;
  --red: #d52b2b;
  --red-2: #ff3b38;
  --amber: #ffd35f;
  --cyan: #54d8ff;
  --green: #48c56b;
  --chip: rgba(255, 255, 255, 0.07);
  --shadow: 0 20px 70px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 15% 0%, rgba(213, 43, 43, 0.22), transparent 34rem),
    radial-gradient(circle at 84% 8%, rgba(84, 216, 255, 0.12), transparent 28rem),
    var(--bg);
  color: var(--text);
  overflow-x: hidden;
}
button, select, input { font: inherit; }
button { color: inherit; }
button:focus-visible, select:focus-visible, input:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

.app { min-height: 100vh; padding-bottom: calc(18px + var(--safe-bottom)); }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 74px;
  padding: calc(10px + var(--safe-top)) 18px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: rgba(8, 8, 9, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand-block { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-logo { width: 52px; height: 52px; border-radius: 50%; object-fit: contain; box-shadow: 0 0 0 1px var(--line-strong), 0 10px 30px rgba(0, 0, 0, .45); flex: 0 0 auto; }
.brand-kicker { display: block; font-size: 11px; letter-spacing: .18em; color: var(--red-2); font-weight: 900; }
h1 { margin: 2px 0 0; font-size: clamp(17px, 2.3vw, 28px); line-height: 1.1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-status { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.status-pill, .tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 31px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--chip);
  color: #dbdbe0;
  font-size: 12px;
  white-space: nowrap;
}
.status-pill i { width: 8px; height: 8px; border-radius: 99px; display: block; background: var(--amber); }
.status-pill.good i { background: var(--green); }
.layout {
  width: min(1880px, calc(100vw - 24px));
  margin: 14px auto 0;
  display: grid;
  grid-template-columns: minmax(245px, 300px) minmax(420px, 1fr) minmax(330px, 420px);
  gap: 12px;
  align-items: start;
}
.panel {
  background: linear-gradient(180deg, rgba(31, 31, 35, 0.94), rgba(18, 18, 20, 0.94));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel h2 { margin: 0; font-size: 15px; letter-spacing: .02em; }
.panel p { margin: 4px 0 0; color: var(--muted); font-size: 12px; line-height: 1.35; }
.panel-title-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 14px 14px 10px; border-bottom: 1px solid var(--line); }
.procedure-panel { position: sticky; top: 88px; max-height: calc(100vh - 118px); overflow: auto; }
.steps { list-style: none; padding: 10px 12px 14px; margin: 0; display: grid; gap: 8px; }
.steps li {
  position: relative;
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 8px;
  align-items: center;
  min-height: 48px;
  padding: 9px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
}
.steps li.active { border-color: rgba(213, 43, 43, .72); background: linear-gradient(90deg, rgba(213, 43, 43, 0.23), rgba(255, 255, 255, 0.035)); }
.steps li.done { opacity: .84; }
.step-num { width: 28px; height: 28px; border-radius: 999px; display: grid; place-items: center; font-weight: 900; border: 1px solid var(--line-strong); background: #101013; }
.steps li.done .step-num { background: rgba(72, 197, 107, .18); color: var(--green); border-color: rgba(72, 197, 107, .55); }
.steps li.active .step-num { background: var(--red); color: white; border-color: var(--red); }
.step-copy strong { display: block; font-size: 13px; line-height: 1.15; }
.step-copy span { display: block; margin-top: 3px; color: var(--muted); font-size: 11px; line-height: 1.25; }
.step-check { color: var(--muted); font-weight: 800; }
.steps li.done .step-check { color: var(--green); }
.steps li.active .step-check { color: var(--red-2); }

.viewer-section { display: grid; gap: 12px; min-width: 0; }
.viewer-card { padding: 0; }
.viewer-header { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px; border-bottom: 1px solid var(--line); }
.viewer-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.primary-btn, .secondary-btn, .mini-btn, .tool-btn, .feature-buttons button, .nudge-grid button {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.065);
  border-radius: 11px;
  padding: 9px 11px;
  font-weight: 800;
  font-size: 12px;
  cursor: pointer;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.primary-btn { background: linear-gradient(135deg, var(--red), #a71919); border-color: rgba(255, 255, 255, .18); }
.secondary-btn, .mini-btn { background: rgba(255, 255, 255, 0.08); }
button:hover, .upload-label:hover { transform: translateY(-1px); border-color: rgba(255, 255, 255, 0.36); }
.viewer-toolbar { display: flex; gap: 7px; padding: 10px 12px; flex-wrap: wrap; border-bottom: 1px solid var(--line); background: rgba(0,0,0,.18); }
.tool-btn { min-height: 36px; }
.tool-btn.active { border-color: rgba(213,43,43,.85); background: rgba(213,43,43,.22); color: white; }
.upload-label { display: inline-flex; align-items: center; justify-content: center; }
#cadUpload { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.canvas-shell { position: relative; min-height: clamp(410px, 55vh, 760px); background: #050506; overflow: hidden; border-bottom: 1px solid var(--line); }
#sceneCanvas { display: block; width: 100%; height: 100%; min-height: inherit; touch-action: none; }
.hud {
  position: absolute;
  z-index: 4;
  max-width: 48%;
  padding: 7px 10px;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 999px;
  background: rgba(0, 0, 0, .55);
  color: #ededf2;
  font-size: 12px;
  backdrop-filter: blur(9px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.top-left { left: 10px; top: 10px; }
.top-right { right: 10px; top: 10px; }
.bottom-left { left: 10px; bottom: 10px; }
.bottom-right { right: 10px; bottom: 10px; }
.loader, .fallback-card {
  position: absolute;
  inset: 16px;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 8px;
  padding: 18px;
  border-radius: 18px;
  background: rgba(0,0,0,.70);
  border: 1px solid var(--line);
  z-index: 8;
}
.loader[hidden], .fallback-card[hidden] { display: none; }
.spinner { width: 40px; height: 40px; border-radius: 50%; border: 4px solid rgba(255,255,255,.16); border-top-color: var(--red); animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.metric-grid { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 8px; padding: 10px 12px 12px; }
.metric { border: 1px solid var(--line); background: rgba(255,255,255,.045); border-radius: 14px; padding: 10px; min-width: 0; }
.metric span { display: block; color: var(--muted); font-size: 11px; margin-bottom: 5px; }
.metric strong { display: block; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.training-card { padding-bottom: 12px; }
.training-grid { padding: 12px; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 8px; }
.training-step { padding: 11px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.04); min-height: 88px; }
.training-step.active { border-color: rgba(213,43,43,.75); background: rgba(213,43,43,.18); }
.training-step strong { display: block; font-size: 12px; margin-bottom: 5px; }
.training-step span { display: block; color: var(--muted); font-size: 11px; line-height: 1.35; }

.right-stack { display: grid; gap: 12px; min-width: 0; }
.recipe-panel, .feature-panel, .transform-panel, .robot-panel { padding: 14px; }
.recipe-panel h2, .feature-panel h2, .transform-panel h2 { margin-bottom: 12px; }
.field-label { display: block; color: var(--muted); font-size: 11px; font-weight: 800; margin: 8px 0 6px; text-transform: uppercase; letter-spacing: .08em; }
.select-field, .param-list select {
  width: 100%;
  min-height: 38px;
  background: rgba(255,255,255,.08);
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  color: var(--text);
  padding: 8px 10px;
}
.param-list { display: grid; gap: 10px; margin-top: 12px; }
.param-list.compact { gap: 8px; }
.param-list label { display: grid; gap: 6px; color: #e7e7ec; font-size: 12px; font-weight: 750; }
.param-list output { float: right; color: var(--cyan); font-weight: 900; margin-left: 6px; }
input[type="range"] { width: 100%; accent-color: var(--red); }
.feature-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.feature-buttons.two { grid-template-columns: 1fr 1fr; }
.feature-buttons button, .nudge-grid button { min-height: 38px; background: rgba(255,255,255,.06); }
.nudge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0 12px; }
.joint-list { display: grid; gap: 8px; margin-top: 12px; }
.joint-row { display: grid; grid-template-columns: 62px 1fr 54px; align-items: center; gap: 8px; font-size: 12px; }
.joint-row span:first-child { color: #ededf2; font-weight: 900; }
.joint-row output { color: var(--cyan); text-align: right; font-weight: 850; }

.footer {
  width: min(1880px, calc(100vw - 24px));
  margin: 12px auto 0;
  min-height: 42px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  padding: 8px 4px;
}
#logLine { text-align: right; color: #e1e1e6; }

@media (max-width: 1240px) {
  .layout { grid-template-columns: minmax(230px, 285px) minmax(380px, 1fr); }
  .right-stack { grid-column: 1 / -1; grid-template-columns: repeat(2, minmax(0,1fr)); }
  .procedure-panel { max-height: none; }
  .metric-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
}
@media (max-width: 900px) {
  .topbar { position: relative; align-items: flex-start; flex-direction: column; padding-left: 12px; padding-right: 12px; }
  .topbar-status { justify-content: flex-start; }
  h1 { white-space: normal; }
  .layout { width: min(100vw - 16px, 720px); display: flex; flex-direction: column; gap: 10px; }
  .viewer-section { order: 1; width: 100%; }
  .procedure-panel { order: 2; width: 100%; position: static; }
  .right-stack { order: 3; display: grid; grid-template-columns: 1fr; width: 100%; }
  .viewer-header { align-items: stretch; flex-direction: column; }
  .viewer-actions { justify-content: flex-start; }
  .viewer-toolbar { gap: 6px; overflow: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
  .tool-btn { flex: 0 0 auto; min-height: 40px; }
  .canvas-shell { min-height: min(66vh, 560px); }
  .metric-grid, .training-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .footer { width: min(100vw - 16px, 720px); flex-direction: column; align-items: flex-start; }
  #logLine { text-align: left; }
  .hud { max-width: 64%; font-size: 11px; }
}
@media (max-width: 560px) {
  .brand-logo { width: 46px; height: 46px; }
  .status-pill { font-size: 11px; min-height: 28px; padding: 5px 8px; }
  .canvas-shell { min-height: min(58vh, 430px); }
  .metric-grid, .training-grid { grid-template-columns: 1fr 1fr; }
  .metric { padding: 8px; }
  .metric strong { font-size: 12px; }
  .feature-buttons, .feature-buttons.two, .nudge-grid { grid-template-columns: 1fr 1fr; }
  .joint-row { grid-template-columns: 54px 1fr 48px; }
  .steps li { grid-template-columns: 28px 1fr 24px; }
}
@media (max-width: 380px) {
  .metric-grid, .training-grid { grid-template-columns: 1fr; }
}