:root {
  color-scheme: dark;
  --bg: #050914;
  --panel: rgba(11, 18, 31, 0.94);
  --panel-2: rgba(14, 24, 41, 0.94);
  --line: rgba(142, 169, 207, 0.16);
  --line-strong: rgba(142, 169, 207, 0.28);
  --text: #eaf2ff;
  --muted: #91a4be;
  --faint: #64758e;
  --accent: #62b8ff;
  --accent-2: #74e1bd;
  --warm: #ffb365;
  --danger: #ff7d84;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); }
body {
  min-width: 320px;
  background:
    radial-gradient(circle at 52% -20%, rgba(45, 91, 142, 0.21), transparent 45%),
    linear-gradient(180deg, #07101d 0, #050914 45%, #050811 100%);
}
button, select, input { font: inherit; }
button, select, input[type="range"], input[type="checkbox"] { accent-color: var(--accent); }
button:focus-visible, select:focus-visible, input:focus-visible {
  outline: 2px solid rgba(98, 184, 255, 0.92);
  outline-offset: 2px;
}

.app-header {
  min-height: 72px;
  padding: 12px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 10, 19, 0.86);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand-lockup { display: flex; align-items: center; gap: 13px; min-width: 0; }
.brand-lockup h1 { margin: 0; font-size: 19px; letter-spacing: 0.01em; line-height: 1.1; }
.brand-lockup p { margin: 4px 0 0; color: var(--muted); font-size: 11px; letter-spacing: 0.03em; white-space: nowrap; }
.brand-mark { width: 38px; height: 38px; position: relative; border: 1px solid rgba(98, 184, 255, 0.4); border-radius: 50%; box-shadow: inset 0 0 20px rgba(98,184,255,.08), 0 0 20px rgba(98,184,255,.08); }
.brand-mark::before, .brand-mark::after { content: ""; position: absolute; inset: 7px; border: 1px solid rgba(116, 225, 189, .34); border-radius: 50%; transform: rotate(58deg) scaleY(.43); }
.brand-mark::after { transform: rotate(-38deg) scaleY(.43); }
.brand-mark span { position: absolute; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 9px var(--accent); }
.brand-mark span:nth-child(1) { left: 16px; top: 16px; background: #fff; }
.brand-mark span:nth-child(2) { left: 27px; top: 10px; }
.brand-mark span:nth-child(3) { left: 7px; top: 25px; background: var(--accent-2); }
.header-meta { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 7px; }
.header-chip, .version-label { padding: 5px 8px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.header-chip--accent { border-color: rgba(116, 225, 189, .26); color: var(--accent-2); background: rgba(116,225,189,.05); }
.version-label { border: 0; color: var(--faint); }

.workspace {
  width: min(1900px, 100%);
  margin: 0 auto;
  padding: 14px;
  display: grid;
  grid-template-columns: minmax(255px, 320px) minmax(480px, 1fr) minmax(250px, 310px);
  gap: 14px;
  align-items: start;
}
.panel, .viewer-card, .history-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(14, 23, 39, .94), rgba(8, 14, 25, .96));
  box-shadow: var(--shadow);
  overflow: hidden;
}
.control-panel, .diagnostics-panel { position: sticky; top: 87px; max-height: calc(100vh - 101px); overflow-y: auto; scrollbar-width: thin; scrollbar-color: rgba(126,158,199,.3) transparent; }
.panel-section { padding: 15px; border-bottom: 1px solid var(--line); }
.panel-section:last-child { border-bottom: 0; }
.panel-section--compact { padding-bottom: 12px; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.section-heading--row { align-items: flex-end; }
.section-heading h2 { margin: 2px 0 0; font-size: 14px; font-weight: 650; }
.eyebrow { display: block; color: var(--accent); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .14em; }

.engine-switch { display: grid; gap: 7px; }
.engine-tab {
  min-height: 54px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--muted);
  background: rgba(5, 11, 20, .55);
  cursor: pointer;
  text-align: left;
  transition: border-color .16s ease, background .16s ease, color .16s ease, transform .16s ease;
}
.engine-tab:hover:not(:disabled) { border-color: var(--line-strong); transform: translateY(-1px); }
.engine-tab.is-active { color: var(--text); border-color: rgba(98,184,255,.48); background: linear-gradient(90deg, rgba(36,100,156,.22), rgba(8,16,29,.7)); box-shadow: inset 3px 0 0 var(--accent); }
.engine-tab.is-disabled { opacity: .42; cursor: not-allowed; }
.engine-tab__index { color: var(--faint); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.engine-tab strong { display: block; font-size: 12px; }
.engine-tab small { display: block; margin-top: 2px; color: var(--faint); font-size: 10px; }

.toggle-label { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 10px; cursor: pointer; }
.toggle-label input { width: 14px; height: 14px; }
.config-form { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.form-field { min-width: 0; display: grid; gap: 5px; }
.form-field--wide { grid-column: 1 / -1; }
.form-field--advanced { display: none; }
.config-form.is-advanced .form-field--advanced { display: grid; }
.form-field label, .form-field > span { color: var(--muted); font-size: 10px; line-height: 1.3; }
.form-field select, .form-field input[type="number"] {
  min-width: 0;
  width: 100%;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 8px;
  background: rgba(4, 9, 17, .72);
  color: var(--text);
  font-size: 11px;
}
.form-field select:hover, .form-field input[type="number"]:hover { border-color: var(--line-strong); }
.form-field .unit-input { display: grid; grid-template-columns: 1fr auto; align-items: stretch; }
.form-field .unit-input input { border-radius: 8px 0 0 8px; }
.form-field .unit-input span { min-width: 38px; display: grid; place-items: center; border: 1px solid var(--line); border-left: 0; border-radius: 0 8px 8px 0; color: var(--faint); background: rgba(22,31,47,.62); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.checkbox-field { min-height: 34px; border: 1px solid var(--line); border-radius: 8px; padding: 7px 8px; display: flex; align-items: center; gap: 7px; background: rgba(4,9,17,.46); }
.checkbox-field input { margin: 0; }
.form-subheading { grid-column: 1/-1; margin-top: 5px; padding-top: 9px; border-top: 1px dashed var(--line); color: var(--accent-2); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.form-readout { min-height: 34px; border: 1px dashed var(--line); border-radius: 8px; padding: 8px; color: var(--muted); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; background: rgba(4,9,17,.25); }
.scenario-description { margin-top: 10px; padding: 9px 10px; border-left: 2px solid rgba(98,184,255,.5); background: rgba(98,184,255,.05); color: var(--muted); font-size: 10px; line-height: 1.55; }
.performance-warning { margin-top: 9px; padding: 9px 10px; border: 1px solid rgba(255,179,101,.24); border-radius: 8px; background: rgba(255,179,101,.07); color: #ffd0a1; font-size: 10px; line-height: 1.5; }

.button {
  min-height: 35px;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 7px 10px;
  background: rgba(18, 29, 47, .72);
  color: var(--text);
  cursor: pointer;
  font-size: 11px;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.button:hover:not(:disabled) { transform: translateY(-1px); border-color: var(--line-strong); background: rgba(25, 40, 63, .78); }
.button:disabled { opacity: .45; cursor: not-allowed; }
.button--wide { width: 100%; }
.button--primary { border-color: rgba(98,184,255,.45); background: linear-gradient(135deg, rgba(39,119,181,.92), rgba(31,81,135,.9)); font-weight: 650; }
.button--run { border-color: rgba(116,225,189,.34); color: #c9ffed; }
.button--run.is-running { background: rgba(116,225,189,.16); box-shadow: inset 0 0 0 1px rgba(116,225,189,.15); }
.button-grid { display: grid; grid-template-columns: 1.15fr 1fr 1fr; gap: 7px; margin-top: 8px; }
.simulation-state-row { margin-top: 10px; display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 10px; }
.state-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--faint); box-shadow: 0 0 0 3px rgba(100,117,142,.12); }
.state-dot.is-ready { background: var(--accent); box-shadow: 0 0 0 3px rgba(98,184,255,.12), 0 0 8px rgba(98,184,255,.5); }
.state-dot.is-running { background: var(--accent-2); box-shadow: 0 0 0 3px rgba(116,225,189,.12), 0 0 8px rgba(116,225,189,.5); }
.state-dot.is-error { background: var(--danger); }

.center-column { display: grid; gap: 14px; min-width: 0; }
.viewer-card { min-height: 680px; display: grid; grid-template-rows: auto minmax(540px, 1fr) auto; }
.viewer-toolbar { min-height: 62px; padding: 10px 13px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); }
.viewer-title { min-width: 0; display: flex; align-items: center; gap: 10px; }
.viewer-title strong { display: block; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.viewer-title small { display: block; margin-top: 2px; color: var(--muted); font-size: 10px; }
.engine-badge { padding: 5px 7px; border: 1px solid rgba(98,184,255,.33); border-radius: 6px; color: var(--accent); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.viewer-controls { display: flex; align-items: flex-end; justify-content: flex-end; gap: 7px; }
.viewer-controls label { display: grid; gap: 3px; }
.viewer-controls label span { color: var(--faint); font: 8px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; }
.viewer-controls select, .history-header select { height: 31px; border: 1px solid var(--line); border-radius: 7px; padding: 0 8px; color: var(--text); background: rgba(4,9,17,.68); font-size: 10px; }
.icon-button { width: 31px; height: 31px; border: 1px solid var(--line); border-radius: 7px; color: var(--muted); background: rgba(4,9,17,.68); cursor: pointer; }
.canvas-shell { position: relative; min-height: 540px; overflow: hidden; background: #050912; }
#particleCanvas { width: 100%; height: 100%; display: block; touch-action: none; cursor: grab; }
#particleCanvas.is-dragging { cursor: grabbing; }
.particle-tooltip { position: absolute; z-index: 5; width: 176px; pointer-events: none; padding: 8px 9px; border: 1px solid rgba(134,167,208,.32); border-radius: 8px; background: rgba(5,10,19,.92); color: #dfeeff; box-shadow: 0 10px 28px rgba(0,0,0,.35); font: 10px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; }
.particle-tooltip strong { color: var(--accent); }
.canvas-help { position: absolute; left: 12px; bottom: 10px; color: rgba(173,195,224,.42); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; pointer-events: none; }
.canvas-corner-metrics { position: absolute; right: 11px; top: 10px; display: flex; flex-direction: column; align-items: flex-end; gap: 3px; pointer-events: none; }
.canvas-corner-metrics span { padding: 3px 6px; border-radius: 5px; background: rgba(5,10,19,.52); color: rgba(216,231,251,.66); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.viewer-footer-controls { min-height: 48px; padding: 8px 12px; display: flex; align-items: center; gap: 15px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; }
.range-control { display: flex; align-items: center; gap: 7px; }
.range-control input { width: 100px; }
.range-control--trail { margin-left: auto; }
.check-control { display: flex; align-items: center; gap: 5px; }

.history-card { min-height: 156px; display: grid; grid-template-rows: auto 1fr; }
.history-header { min-height: 46px; padding: 8px 12px; display: flex; align-items: center; justify-content: space-between; gap: 10px; border-bottom: 1px solid var(--line); }
.history-header strong { display: block; margin-top: 2px; font-size: 11px; }
#historyCanvas { width: 100%; height: 110px; display: block; }

.diagnostics-grid { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.diagnostics-grid > div { min-width: 0; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: rgba(4,9,17,.42); }
.diagnostics-grid dt { margin: 0 0 4px; color: var(--faint); font-size: 9px; }
.diagnostics-grid dd { margin: 0; color: #dceaff; font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.diagnostic-note { margin: 10px 0 0; padding: 9px 10px; border-radius: 8px; background: rgba(98,184,255,.055); color: var(--muted); font-size: 10px; line-height: 1.55; }
.concept-text { color: var(--muted); font-size: 10px; line-height: 1.58; }
.concept-text p { margin: 0 0 8px; }
.concept-text p:last-child { margin-bottom: 0; }
.concept-text strong { color: var(--text); }
.export-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.file-button { margin-top: 8px; min-height: 34px; display: grid; place-items: center; border: 1px dashed var(--line-strong); border-radius: 8px; color: var(--muted); font-size: 10px; cursor: pointer; }
.file-button:hover { border-color: rgba(98,184,255,.42); color: var(--text); }
.file-button input { display: none; }
.export-hint { margin: 8px 0 0; color: var(--faint); font-size: 9px; line-height: 1.45; }

.app-footer { min-height: 44px; padding: 10px 18px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 16px; color: var(--faint); font-size: 9px; }

@media (max-width: 1260px) {
  .workspace { grid-template-columns: 285px minmax(460px, 1fr); }
  .diagnostics-panel { position: static; max-height: none; grid-column: 1 / -1; display: grid; grid-template-columns: 1.6fr 1fr 1fr; }
  .diagnostics-panel .panel-section { border-bottom: 0; border-right: 1px solid var(--line); }
  .diagnostics-panel .panel-section:last-child { border-right: 0; }
}

@media (max-width: 860px) {
  .app-header { position: static; align-items: flex-start; }
  .header-meta { display: none; }
  .brand-lockup p { white-space: normal; }
  .workspace { grid-template-columns: 1fr; padding: 8px; }
  .control-panel, .diagnostics-panel { position: static; max-height: none; }
  .center-column { grid-row: 1; }
  .control-panel { grid-row: 2; }
  .diagnostics-panel { grid-row: 3; display: block; }
  .diagnostics-panel .panel-section { border-right: 0; border-bottom: 1px solid var(--line); }
  .viewer-card { min-height: 590px; grid-template-rows: auto minmax(450px, 1fr) auto; }
  .canvas-shell { min-height: 450px; }
  .viewer-toolbar { align-items: flex-start; flex-direction: column; }
  .viewer-controls { width: 100%; justify-content: stretch; }
  .viewer-controls label { flex: 1; }
  .viewer-controls select { width: 100%; }
  .app-footer { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .app-header { padding: 11px 12px; }
  .brand-lockup p { display: none; }
  .config-form { grid-template-columns: 1fr; }
  .form-field--wide, .form-subheading { grid-column: 1; }
  .viewer-footer-controls { flex-wrap: wrap; }
  .range-control--trail { margin-left: 0; }
  .button-grid { grid-template-columns: 1fr 1fr; }
  .button-grid .button:first-child { grid-column: 1 / -1; }
  .diagnostics-grid { grid-template-columns: 1fr 1fr; }
}

/* Resource preflight */
.resource-section { background: linear-gradient(180deg, rgba(12, 25, 43, .96), rgba(8, 16, 29, .96)); }
.risk-badge {
  min-width: 54px;
  padding: 5px 8px;
  border: 1px solid rgba(116,225,189,.35);
  border-radius: 999px;
  color: var(--accent-2);
  background: rgba(116,225,189,.07);
  text-align: center;
  font: 8px ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .1em;
}
.risk-badge[data-risk="moderate"] { color: #ffe39a; border-color: rgba(255,211,100,.36); background: rgba(255,211,100,.08); }
.risk-badge[data-risk="high"] { color: var(--warm); border-color: rgba(255,179,101,.42); background: rgba(255,179,101,.09); }
.risk-badge[data-risk="blocked"] { color: #ff9ca2; border-color: rgba(255,125,132,.5); background: rgba(255,125,132,.1); }
.hardware-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.hardware-grid > div { padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: rgba(4,9,17,.42); }
.hardware-grid span, .resource-primary-readout span { display: block; color: var(--faint); font-size: 8px; }
.hardware-grid strong { display: block; margin-top: 3px; color: #dceaff; font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.resource-controls { margin-top: 9px; display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.resource-controls > label { min-width: 0; display: grid; gap: 5px; color: var(--muted); font-size: 9px; }
.resource-controls select, .resource-controls input[type="number"] {
  width: 100%; min-width: 0; height: 34px; padding: 0 8px;
  border: 1px solid var(--line); border-radius: 8px;
  background: rgba(4,9,17,.72); color: var(--text); font-size: 10px;
}
.resource-memory-input { display: grid; grid-template-columns: 1fr auto; }
.resource-memory-input input { border-radius: 8px 0 0 8px !important; }
.resource-memory-input span { min-width: 36px; display: grid; place-items: center; border: 1px solid var(--line); border-left: 0; border-radius: 0 8px 8px 0; color: var(--faint); background: rgba(22,31,47,.62); font: 8px ui-monospace, SFMono-Regular, Menlo, monospace; }
.text-button { margin-top: 6px; padding: 0; border: 0; color: var(--accent); background: none; cursor: pointer; font-size: 9px; text-align: left; }
.text-button:disabled { opacity: .4; cursor: default; }
.resource-primary-readout { margin-top: 11px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 7px; }
.resource-primary-readout > div { padding: 10px; border: 1px solid rgba(98,184,255,.22); border-radius: 9px; background: rgba(98,184,255,.055); }
.resource-primary-readout strong { display: block; margin-top: 4px; font: 650 15px ui-monospace, SFMono-Regular, Menlo, monospace; color: #eaf5ff; }
.resource-meter { height: 7px; margin: 8px 0 10px; overflow: hidden; border: 1px solid var(--line); border-radius: 999px; background: rgba(4,9,17,.72); }
.resource-meter span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent-2), var(--accent), var(--warm), var(--danger)); transition: width .2s ease; }
.resource-detail-grid { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.resource-detail-grid > div { min-width: 0; padding: 7px; border-radius: 7px; background: rgba(4,9,17,.35); }
.resource-detail-grid dt { margin: 0 0 3px; color: var(--faint); font-size: 8px; }
.resource-detail-grid dd { margin: 0; color: #dceaff; font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.button--small { min-height: 31px; margin-top: 8px; font-size: 9px; }
.resource-risk-message { margin: 8px 0 0; color: var(--muted); font-size: 9px; line-height: 1.45; }
.resource-notes { margin: 7px 0 0; padding-left: 16px; color: var(--faint); font-size: 8px; line-height: 1.45; }
.resource-notes li + li { margin-top: 3px; }
#renderParticleLimitInput { width: 82px; height: 28px; padding: 0 6px; border: 1px solid var(--line); border-radius: 6px; color: var(--text); background: rgba(4,9,17,.68); font-size: 9px; }

.preflight-dialog {
  width: min(680px, calc(100vw - 24px)); max-height: calc(100vh - 30px); padding: 0;
  border: 1px solid rgba(121,165,218,.34); border-radius: 15px;
  color: var(--text); background: rgba(7,13,24,.98); box-shadow: 0 28px 90px rgba(0,0,0,.6);
}
.preflight-dialog::backdrop { background: rgba(1,5,11,.78); backdrop-filter: blur(7px); }
.preflight-card { padding: 19px; }
.preflight-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.preflight-heading h2 { margin: 3px 0 0; font-size: 17px; }
.preflight-summary { margin-top: 13px; padding: 13px; border: 1px solid rgba(98,184,255,.24); border-radius: 10px; background: rgba(98,184,255,.06); color: #dceaff; font-size: 11px; line-height: 1.55; }
.preflight-summary strong { color: #fff; }
.preflight-breakdown { margin: 11px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.preflight-breakdown > div { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 9px; border: 1px solid var(--line); border-radius: 8px; background: rgba(4,9,17,.45); }
.preflight-breakdown dt { color: var(--muted); font-size: 9px; }
.preflight-breakdown dd { margin: 0; color: #eaf4ff; font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.preflight-warnings { margin-top: 10px; color: #ffd4a8; font-size: 9px; line-height: 1.5; }
.preflight-warnings ul { margin: 0; padding-left: 17px; }
.unsafe-override { margin-top: 12px; padding: 10px; display: flex; align-items: flex-start; gap: 8px; border: 1px solid rgba(255,125,132,.38); border-radius: 9px; background: rgba(255,125,132,.07); color: #ffd4d7; font-size: 10px; line-height: 1.4; }
.unsafe-override[hidden] { display: none !important; }
.preflight-actions { margin-top: 15px; display: flex; justify-content: flex-end; gap: 8px; }

@media (max-width: 560px) {
  .resource-controls, .resource-primary-readout, .preflight-breakdown { grid-template-columns: 1fr; }
  .preflight-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .viewer-footer-controls { align-items: flex-start; }
}

/* Interpretation and termination guidance */
.scenario-progress { margin-top: 9px; display: grid; gap: 6px; }
.scenario-progress > div { padding: 8px 9px; border: 1px solid var(--line); border-radius: 8px; background: rgba(4,9,17,.42); }
.scenario-progress span { display: block; margin-bottom: 4px; color: var(--faint); font-size: 8px; letter-spacing: .04em; }
.scenario-progress strong { display: block; color: #dceaff; font-size: 9px; line-height: 1.5; font-weight: 500; }
.quantity-guide { color: var(--muted); font-size: 9.5px; line-height: 1.58; }
.quantity-guide p { margin: 0 0 8px; }
.quantity-guide p:last-child { margin-bottom: 0; }
.quantity-guide strong { color: var(--text); }
.quantity-guide code { color: #bfe0ff; font-size: .95em; }
.form-readout-note { margin-top: 4px; color: var(--faint); font-size: 8px; line-height: 1.4; }

/* Scenario guidance, three-engine configuration and documentation */
.config-form { display: grid; grid-template-columns: 1fr; gap: 10px; }
.config-group {
  min-width: 0;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(4, 9, 17, .34);
}
.config-group > legend {
  padding: 0 6px;
  color: var(--accent-2);
  font: 9px ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .08em;
}
.config-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.config-field { min-width: 0; display: grid; gap: 4px; }
.config-field > span, .config-check > span { color: var(--muted); font-size: 9px; line-height: 1.35; }
.config-field select, .config-field input[type="number"] {
  width: 100%; min-width: 0; height: 33px; padding: 0 8px;
  border: 1px solid var(--line); border-radius: 8px;
  color: var(--text); background: rgba(3, 8, 16, .76); font-size: 10px;
}
.config-field input:disabled, .config-field select:disabled { opacity: .48; cursor: not-allowed; }
.config-check {
  min-height: 33px; padding: 7px 8px; display: flex; align-items: center; gap: 7px;
  border: 1px solid var(--line); border-radius: 8px; background: rgba(3,8,16,.48);
}
.config-check input { margin: 0; }
.advanced-field { display: none; }
.config-form.is-advanced .advanced-field { display: block; }
.config-grid .advanced-field { display: none; }
.config-form.is-advanced .config-grid .advanced-field { display: grid; }
.computed-field {
  grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 10px; align-items: center;
  padding: 8px 9px; border: 1px dashed rgba(98,184,255,.25); border-radius: 8px;
  color: var(--muted); background: rgba(98,184,255,.045); font-size: 9px;
}
.computed-field strong { color: #dceeff; font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.computed-field small { display: block; max-width: 45ch; color: var(--faint); font-size: 8px; line-height: 1.4; text-align: right; }
.model-callout {
  margin-top: 9px; padding: 9px 10px; border-left: 2px solid var(--warm);
  color: #d8c4ae; background: rgba(255,179,101,.055); font-size: 9px; line-height: 1.55;
}
.model-callout strong { color: #ffe1bf; }

.resource-detail-grid dd[data-risk="low"] { color: var(--accent-2); }
.resource-detail-grid dd[data-risk="moderate"] { color: #ffe39a; }
.resource-detail-grid dd[data-risk="high"] { color: var(--warm); }
.resource-detail-grid dd[data-risk="blocked"] { color: var(--danger); }

.scenario-metrics { margin-top: 10px; display: grid; gap: 6px; }
.scenario-metrics > div {
  padding: 8px 9px; border: 1px solid rgba(116,225,189,.15); border-radius: 8px;
  background: rgba(116,225,189,.035);
}
.scenario-metrics span { display: block; color: var(--faint); font-size: 8px; }
.scenario-metrics strong { display: block; margin-top: 3px; color: #dffbef; font: 9px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace; }
.scenario-metrics small { display: block; margin-top: 4px; color: var(--muted); font-size: 8px; line-height: 1.45; }

.scenario-guide-card {
  padding: 16px; border: 1px solid rgba(116,225,189,.18); border-radius: 14px;
  background: linear-gradient(180deg, rgba(12,26,38,.96), rgba(7,14,25,.98)); box-shadow: var(--shadow);
}
.scenario-guide-card .section-heading { margin-bottom: 11px; }
.scenario-guide-content { color: var(--muted); font-size: 10px; line-height: 1.58; }
.scenario-guide-lead { margin: 0 0 12px; padding: 10px 11px; border-left: 3px solid var(--accent-2); background: rgba(116,225,189,.055); color: #dffbef; }
.scenario-guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.scenario-guide-grid section { padding: 10px; border: 1px solid var(--line); border-radius: 9px; background: rgba(4,9,17,.4); }
.scenario-guide-grid h3 { margin: 0 0 7px; color: var(--text); font-size: 10px; }
.scenario-guide-grid ul { margin: 0; padding-left: 18px; }
.scenario-guide-grid li + li { margin-top: 4px; }
.scenario-guide-terms { margin: 11px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.scenario-guide-terms span { padding: 4px 7px; border: 1px solid rgba(98,184,255,.22); border-radius: 999px; color: #cae6ff; background: rgba(98,184,255,.055); font-size: 8px; }
.limitations { margin-top: 9px; padding: 9px 10px; border: 1px solid rgba(255,179,101,.2); border-radius: 8px; background: rgba(255,179,101,.045); }
.limitations summary { color: #ffd8ae; cursor: pointer; }
.limitations ul { margin: 8px 0 0; padding-left: 18px; }
.limitations li + li { margin-top: 4px; }

.documentation-links { margin-top: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.documentation-links a {
  min-height: 31px; display: grid; place-items: center; padding: 6px 8px;
  border: 1px solid var(--line); border-radius: 8px; color: var(--accent); background: rgba(4,9,17,.45);
  text-decoration: none; font-size: 9px; text-align: center;
}
.documentation-links a:hover { border-color: rgba(98,184,255,.4); color: #dff0ff; }

@media (max-width: 1260px) {
  .scenario-guide-card { grid-column: 1; }
}
@media (max-width: 700px) {
  .config-grid, .scenario-guide-grid, .documentation-links { grid-template-columns: 1fr; }
  .computed-field { grid-column: 1; }
  .viewer-footer-controls { gap: 9px; }
}

.hard-block-warning {
  margin: 0 0 10px;
  padding: 9px 10px;
  border: 1px solid rgba(255, 104, 125, .42);
  border-radius: 8px;
  color: #ffd7de;
  background: rgba(255, 104, 125, .09);
  font-size: 9px;
  line-height: 1.5;
}