/* Physicstan AI v1.3.7 — conversation control + dimensional-work presentation.
   Scoped only under .pst-app; existing MathJax/physics/animations remain untouched. */
.pst-app .pst-workspace-toolbar {display:flex;justify-content:space-between;align-items:center;gap:12px;max-width:min(100%,var(--pst-chat-column,900px));margin:16px auto 12px;padding:11px 14px;background:var(--pst-surface);color:var(--pst-text);border:1px solid var(--pst-border);border-radius:16px}
.pst-app .pst-workspace-caption{display:grid;gap:2px;min-width:0}
.pst-app .pst-workspace-caption strong{font-size:13px;font-weight:800;color:var(--pst-text)}
.pst-app .pst-workspace-caption span{font-size:12px;color:var(--pst-muted)}
.pst-app .pst-clear-chat{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:42px;padding:8px 13px;border:1px solid var(--pst-border);border-radius:12px;font-size:13px;font-weight:750;line-height:1.25;background:var(--pst-bg);color:var(--pst-text);white-space:nowrap;cursor:pointer;transition:background .15s,border-color .15s}
.pst-app .pst-clear-chat span{font-size:18px;font-weight:700;line-height:1}
.pst-app .pst-clear-chat:hover{background:var(--pst-surface-2);color:var(--pst-text);border-color:var(--pst-accent)}
.pst-app .pst-clear-chat:focus-visible{outline:3px solid var(--pst-accent);outline-offset:3px}
.pst-app .pst-reset-primary{background:var(--pst-bg);box-shadow:0 2px 9px color-mix(in srgb,var(--pst-text) 6%,transparent)}
.pst-app .pst-reset-secondary{min-height:35px;padding:6px 9px;font-size:12px}
.pst-app .pst-clear-chat:disabled{opacity:.45;cursor:wait}
.pst-app .pst-dimensional-card{border:1px solid var(--pst-border);border-radius:16px;background:var(--pst-surface-2);padding:clamp(13px,2vw,21px);color:var(--pst-text);max-width:100%;min-width:0}
.pst-app .pst-dimensional-label{display:inline-block;font-size:12px;letter-spacing:.02em;font-weight:750;color:var(--pst-muted);margin-bottom:9px}
.pst-app .pst-dimensional-equation{margin:8px 0 14px}
.pst-app .pst-dimensional-sides{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:100%;margin:12px 0}
.pst-app .pst-dimensional-side{display:grid;gap:8px;min-width:0;max-width:100%;padding:10px 13px;border:1px solid var(--pst-border);background:var(--pst-bg);border-radius:12px}
.pst-app .pst-dimensional-side strong{font-size:12px;color:var(--pst-muted)}
.pst-app .pst-dimensional-side .pst-math{color:var(--pst-text)}
.pst-app .pst-dimensional-side mjx-container{max-width:100%;overflow-x:auto;overflow-y:hidden}
.pst-app .pst-dimensional-explanation{margin:10px 0;font-size:14px;line-height:1.55;color:var(--pst-text)}
.pst-app .pst-dimensional-verified{display:grid;gap:8px;margin-top:13px}
.pst-app .pst-dimensional-check{display:grid;gap:4px;border:1px solid var(--pst-border);border-radius:10px;padding:9px 11px;background:var(--pst-bg)}
.pst-app .pst-dimensional-check.is-passed{border-left:3px solid var(--pst-success)}
.pst-app .pst-dimensional-check.is-failed{border-left:3px solid var(--pst-warn)}
.pst-app .pst-dimensional-check strong{font-size:12px;color:var(--pst-text)}
.pst-app .pst-dimensional-check small{font-size:11px;color:var(--pst-muted);overflow-wrap:anywhere}
.pst-app .pst-dimensional-disclaimer{display:block;margin-top:12px;color:var(--pst-muted);font-size:11px;line-height:1.45}
@media(max-width:640px){.pst-app .pst-workspace-toolbar{margin:10px auto 9px;padding:9px;flex-wrap:wrap}.pst-app .pst-workspace-caption span{display:none}.pst-app .pst-workspace-caption strong{font-size:12px}.pst-app .pst-reset-primary{min-height:42px}.pst-app .pst-dimensional-sides{grid-template-columns:1fr}}
@media print{.pst-app .pst-workspace-toolbar,.pst-app .pst-clear-chat{display:none!important}.pst-app .pst-dimensional-card{background:#fff!important;color:#10203a!important;border:1px solid #aab8cc!important}}
@media(prefers-reduced-motion:reduce){.pst-app .pst-clear-chat{transition:none}}