:root{--primary:#2563eb;--primary-dark:#1d4ed8;--accent:#2563eb;--surface:#ffffff;--surface-muted:#f4f6fb;--border:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--shadow-soft:0 20px 45px rgba(15,23,42,0.08);--gradient:linear-gradient(135deg,#2563eb 0%,#93c5fd 100%);}
.phc-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.phc-studio{padding:0;margin:0 0 0.5rem;}
.phc-card{border-radius:20px;border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-soft);overflow:hidden;margin-bottom:2.5rem;}
.phc-card-inner{display:grid;grid-template-columns:1fr;gap:0;min-height:0;}
@media (min-width:900px){.phc-card-inner{grid-template-columns:minmax(260px,22rem) minmax(0,1fr);align-items:stretch;min-height:min(70vh,640px);}}
.phc-panel-title{margin:0 0 0.65rem;font-size:0.68rem;font-weight:800;letter-spacing:0.11em;text-transform:uppercase;color:var(--text-muted);}
.phc-panel-title--results{color:var(--primary);}
.phc-panel--options{padding:1.1rem 1.15rem;background:var(--surface-muted);border-bottom:1px solid var(--border);}
@media (min-width:900px){.phc-panel--options{border-bottom:none;border-right:1px solid var(--border);}}
.phc-panel--results{padding:1.15rem 1.2rem;display:flex;flex-direction:column;gap:0;min-width:0;}
.phc-orbit-wrap{margin-bottom:1rem;overflow:hidden;border-radius:14px;border:1px solid var(--border);background:linear-gradient(180deg,var(--surface) 0%,var(--surface-muted) 100%);}
.phc-orbit{display:flex;flex-direction:column;gap:8px;padding:10px;}
.phc-orbit::-webkit-scrollbar{width:6px;}
.phc-orbit::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px;}
.phc-orbit-btn{display:flex;flex-direction:column;align-items:flex-start;gap:3px;width:100%;padding:11px 12px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text-main);font:inherit;cursor:pointer;text-align:left;transition:transform 0.15s ease,box-shadow 0.15s ease,border-color 0.15s ease;}
.phc-orbit-btn:hover,.phc-orbit-btn:focus-visible{transform:translateY(-1px);box-shadow:var(--shadow-soft);outline:none;border-color:var(--primary);}
.phc-orbit-btn[aria-pressed="true"]{border-color:var(--primary);background:linear-gradient(180deg,var(--surface) 0%,#eef2ff 100%);box-shadow:0 0 0 2px rgba(37,99,235,0.35);}
.phc-orbit-name{font-weight:700;font-size:0.875rem;line-height:1.2;}
.phc-orbit-meta{font-size:0.68rem;color:var(--text-muted);font-weight:600;}
.phc-dim-stack{display:grid;gap:1rem;margin-bottom:0;}
.phc-dim-group{display:grid;gap:12px;}
.phc-dim-group[hidden]{display:none!important;}
.phc-field{display:flex;flex-direction:column;gap:6px;}
.phc-field label{font-size:0.8125rem;font-weight:600;color:var(--text-muted);}
.phc-field input{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text-main);font-size:1rem;font-variant-numeric:tabular-nums;}
.phc-field input:focus{outline:2px solid rgba(37,99,235,0.45);outline-offset:2px;border-color:var(--primary);}
.phc-grid-3{display:grid;gap:12px;}
@media (min-width:480px){.phc-grid-3{grid-template-columns:repeat(3,1fr);}}
.phc-panel--options .phc-grid-3{grid-template-columns:1fr;}
.phc-grid-2{display:grid;gap:12px;}
@media (min-width:480px){.phc-grid-2{grid-template-columns:repeat(2,1fr);}}
.phc-panel--options .phc-grid-2{grid-template-columns:1fr;}
.phc-vitals{display:grid;gap:12px;margin-bottom:1rem;}
@media (min-width:640px){.phc-vitals{grid-template-columns:1fr 1fr;}}
.phc-vital{padding:16px 18px;border-radius:16px;border:1px solid var(--border);background:var(--surface-muted);box-shadow:none;}
.phc-vital-label{font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-muted);margin:0 0 6px;}
.phc-vital-val{font-size:clamp(1.35rem,3vw,1.85rem);font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-0.03em;color:var(--text-main);line-height:1.1;}
.phc-vital-unit{font-size:0.85rem;font-weight:600;color:var(--text-muted);margin-top:4px;}
.phc-topo{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:1rem;}
.phc-chip{padding:8px 12px;border-radius:999px;font-size:0.8125rem;font-weight:600;background:var(--surface-muted);border:1px solid var(--border);color:var(--text-main);}
.phc-chip strong{font-weight:800;color:var(--primary);}
.phc-euler{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:12px 16px;margin-bottom:1rem;border-radius:14px;background:#eff6ff;border:1px solid var(--border);}
.phc-euler p{margin:0;font-size:0.9rem;font-weight:600;color:var(--text-main);}
.phc-euler output{font-size:1.1rem;font-weight:800;font-variant-numeric:tabular-nums;}
.phc-canvas-shell{border-radius:18px;border:1px solid var(--border);background:var(--surface-muted);padding:12px;margin-bottom:1rem;display:flex;flex-direction:column;align-items:center;flex:1;min-height:200px;}
.phc-canvas{width:100%;max-width:min(100%,520px);height:auto;aspect-ratio:1;display:block;border-radius:12px;background:linear-gradient(160deg,#fff 0%,var(--surface) 100%);}
.phc-actions{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:0.75rem;}
.phc-btn{padding:11px 18px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text-main);font-weight:600;font-size:0.9rem;cursor:pointer;}
.phc-btn--primary{background:var(--primary);border-color:var(--primary-dark,var(--primary));color:#fff;}
.phc-btn--primary:hover{filter:brightness(1.05);}
.phc-formulas{margin-top:auto;border-radius:16px;border:1px solid var(--border);overflow:hidden;}
.phc-formulas summary{padding:14px 16px;font-weight:700;cursor:pointer;background:var(--surface-muted);list-style:none;}
.phc-formulas summary::-webkit-details-marker{display:none;}
.phc-formulas[open] summary{border-bottom:1px solid var(--border);}
.phc-formulas dl{margin:0;padding:16px;display:grid;gap:12px;}
.phc-formulas dt{font-size:0.75rem;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-muted);font-weight:700;}
.phc-formulas dd{margin:0;font-size:0.95rem;color:var(--text-main);line-height:1.45;}
.phc-prose{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border);}
.phc-prose h2{font-size:clamp(1.25rem,3vw,1.6rem);margin:2rem 0 0.75rem;font-weight:800;color:var(--text-main);}
.phc-prose h2:first-child{margin-top:0;}
.phc-prose p,.phc-prose li{font-size:1rem;line-height:1.65;color:var(--text-main);}
.phc-prose p{margin:0 0 1rem;}
.phc-prose .phc-lead{font-size:1.08rem;color:var(--text-muted);}
.phc-prose ul{margin:0 0 1rem;padding-left:1.25rem;}
.phc-prose li{margin-bottom:0.35rem;}
.phc-table-wrap{overflow-x:auto;margin:1rem 0;border-radius:14px;border:1px solid var(--border);}
.phc-table{width:100%;border-collapse:collapse;font-size:0.9rem;}
.phc-table th,.phc-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);}
.phc-table th{background:var(--surface-muted);font-weight:700;font-size:0.75rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--text-muted);}
.phc-table tr:last-child td{border-bottom:none;}
.phc-callout{margin:1.5rem 0;padding:16px 18px;border-left:4px solid var(--primary);border-radius:0 14px 14px 0;background:var(--surface-muted);}
.phc-callout p{margin:0;font-size:0.95rem;line-height:1.6;}