.sim-shell {
  --sim-border: rgba(20, 20, 20, 0.14);
  --sim-soft: rgba(20, 20, 20, 0.05);
  max-width: 1120px;
  margin: 0 auto;
}

.sim-header,
.sim-briefing {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 28px;
}

.sim-header h1,
.sim-briefing h1 { margin-bottom: 8px; }

.sim-progress {
  font: 700 0.85rem/1 monospace;
  padding: 10px 12px;
  border: 1px solid var(--sim-border);
  border-radius: 999px;
  white-space: nowrap;
}

.sim-meters {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 24px;
}

.sim-meter {
  border: 1px solid var(--sim-border);
  border-radius: 16px;
  padding: 16px;
  background: var(--paper, #fff);
  color: var(--ink);
}

.sim-meter > span,
.sim-meter > small { display: block; }
.sim-meter > span { font-weight: 700; margin-bottom: 8px; }
.sim-meter strong { display: block; font-size: 1.8rem; margin-bottom: 10px; }
.sim-meter strong small { font-size: 0.75rem; font-weight: 500; }
.sim-meter-track { height: 7px; background: var(--sim-soft); border-radius: 999px; overflow: hidden; margin-bottom: 8px; }
.sim-meter-track span { display: block; height: 100%; background: currentColor; border-radius: inherit; transition: width 180ms ease; }

.sim-situation,
.sim-decision-card,
.sim-tools,
.sim-consequence,
.sim-briefing-card,
.sim-review-grid > *,
.sim-reflection,
.sim-blocked {
  border: 1px solid var(--sim-border);
  border-radius: 18px;
  padding: 22px;
  background: var(--paper, #fff);
  color: var(--ink);
  margin-bottom: 18px;
}

.sim-situation > p:last-child,
.sim-consequence > p,
.sim-briefing-card p { max-width: 78ch; font-size: 1.04rem; line-height: 1.6; }

.sim-tools-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.sim-tools-head p:last-child { max-width: 50ch; }
.sim-tool-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.sim-tools .button,
.sim-decision-card .button,
.sim-blocked .button {
  border-color: rgba(7, 18, 29, 0.28);
  color: var(--ink);
}
.sim-tools .button:hover,
.sim-decision-card .button:hover,
.sim-blocked .button:hover { border-color: rgba(7, 18, 29, 0.55); }
.sim-tool-drawer { margin-top: 16px; padding: 18px; border: 1px dashed var(--sim-border); border-radius: 14px; background: var(--sim-soft); }
.sim-tool-drawer ul { padding-left: 20px; }
.sim-tool-drawer li { margin: 8px 0; line-height: 1.45; }

.sim-decision-card fieldset { border: 0; padding: 0; margin: 0; }
.sim-decision-card legend { font-size: 1.3rem; font-weight: 750; margin-bottom: 16px; }
.sim-options { display: grid; gap: 10px; }
.sim-option { display: grid; grid-template-columns: auto 1fr; align-items: start; gap: 10px; padding: 14px; border: 1px solid var(--sim-border); border-radius: 13px; cursor: pointer; }
.sim-option:has(input:checked) { outline: 2px solid currentColor; outline-offset: 1px; }
.sim-option input { margin-top: 3px; accent-color: var(--ink); }
.sim-rationale { display: grid; gap: 8px; margin-top: 18px; }
.sim-rationale textarea {
  width: 100%;
  resize: vertical;
  min-height: 92px;
  padding: 12px 14px;
  border: 1px solid rgba(7, 18, 29, 0.28);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  line-height: 1.5;
}
.sim-rationale textarea:focus { outline: 3px solid rgba(255,177,27,.35); border-color: var(--accent-2); }
.sim-rationale small { color: #52616b; line-height: 1.4; }

.sim-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.sim-message { min-height: 1.4em; margin-top: 12px; font-weight: 650; }

.sim-deltas { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 8px; }
.sim-deltas li { display: flex; justify-content: space-between; gap: 12px; padding-top: 8px; border-top: 1px solid var(--sim-border); }

.sim-review-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(240px, 1fr); gap: 16px; }
.sim-path { list-style: none; padding: 0; display: grid; gap: 12px; }
.sim-path li { display: grid; grid-template-columns: 34px 1fr; gap: 10px; }
.sim-path li > span { font: 700 0.8rem/1.6 monospace; }
.sim-path p { margin: 6px 0 0; }
.sim-reflection ul { margin-bottom: 0; }
.sim-blocked { max-width: 760px; }

.sim-option:focus-within,
.sim-tool-buttons .button:focus-visible,
.sim-actions .button:focus-visible,
.sim-tool-drawer .button:focus-visible,
#sim-focus-target:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 3px;
}

@media (max-width: 860px) {
  .sim-meters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sim-review-grid { grid-template-columns: 1fr; }
  .sim-tools-head { display: block; }
}

@media (max-width: 520px) {
  .sim-meters { grid-template-columns: 1fr; }
  .sim-header { display: block; }
  .sim-progress { display: inline-block; margin-top: 8px; }
  .sim-deltas li { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  .sim-meter-track span { transition: none; }
  .sim-shell *, .sim-shell *::before, .sim-shell *::after { scroll-behavior: auto !important; }
}