/* Phase 8 — multi-page platform architecture */
.ptb-mpa-shell .ptb-nav-btn { text-decoration: none; }
.ptb-mpa-shell .ptb-brand { text-decoration: none; }
.ptb-mobile-nav-toggle { display:none; width:100%; min-height:42px; border:1px solid rgba(255,255,255,.12); border-radius:12px; background:rgba(255,255,255,.035); color:var(--ptb-text,#eef9f7); align-items:center; justify-content:center; gap:8px; cursor:pointer; margin-bottom:12px; }
.ptb-mpa-page-hero { padding:28px; display:grid; grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr); gap:24px; align-items:center; overflow:hidden; background:radial-gradient(circle at 85% 15%,rgba(157,248,255,.12),transparent 26%),linear-gradient(135deg,rgba(157,248,255,.055),rgba(255,255,255,.018)); }
.ptb-mpa-page-hero h2 { margin:16px 0 10px; font-size:clamp(34px,4.6vw,64px); line-height:.94; letter-spacing:-.065em; max-width:980px; }
.ptb-mpa-page-hero p { margin:0; color:var(--ptb-muted,#91a5a7); line-height:1.72; max-width:900px; }
.ptb-mpa-hero-actions { display:flex; align-items:flex-end; gap:10px; flex-wrap:wrap; margin-top:22px; }
.ptb-mpa-page-hero-aside { min-width:0; }
.ptb-mpa-hero-readouts { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; }
.ptb-mpa-hero-readouts > div { padding:14px; border:1px solid rgba(255,255,255,.1); background:rgba(0,0,0,.22); border-radius:16px; }
.ptb-mpa-hero-readouts span { display:block; color:var(--ptb-muted-2,#607274); font-size:10px; text-transform:uppercase; letter-spacing:.12em; font-family:ui-monospace,SFMono-Regular,Menlo,monospace; }
.ptb-mpa-hero-readouts strong { display:block; margin-top:7px; font-size:18px; color:var(--ptb-text,#eef9f7); }
.ptb-mpa-progress { width:100%; height:7px; border-radius:999px; overflow:hidden; background:rgba(255,255,255,.08); margin-top:10px; }
.ptb-mpa-progress span { display:block; height:100%; border-radius:inherit; background:linear-gradient(90deg,#9df8ff,#d8b765); }
.ptb-mpa-empty { min-height:180px; display:grid; place-items:center; align-content:center; text-align:center; gap:8px; padding:24px; color:var(--ptb-muted,#91a5a7); border:1px dashed rgba(255,255,255,.14); border-radius:18px; }
.ptb-mpa-empty i { font-size:28px; color:#9df8ff; }
.ptb-mpa-empty strong { color:var(--ptb-text,#eef9f7); }
.ptb-mpa-empty p { margin:0; max-width:420px; }
.ptb-mpa-search { position:relative; min-width:min(420px,100%); }
.ptb-mpa-search i { position:absolute; left:14px; top:50%; transform:translateY(-50%); color:var(--ptb-muted-2,#607274); }
.ptb-mpa-search input { padding-left:40px !important; width:100%; }
.ptb-mpa-participant-select { min-width:260px; }
.ptb-mpa-participant-select span { display:block; margin-bottom:6px; color:var(--ptb-muted-2,#607274); font-size:10px; letter-spacing:.12em; text-transform:uppercase; font-family:ui-monospace,SFMono-Regular,Menlo,monospace; }
.ptb-mpa-participant-select.compact select { min-height:42px; }
.ptb-mpa-person { display:flex; align-items:center; gap:10px; }
.ptb-mpa-person > span { width:38px; height:38px; display:grid; place-items:center; border-radius:999px; border:1px solid rgba(157,248,255,.24); background:rgba(157,248,255,.08); color:#9df8ff; font-weight:800; }
.ptb-mpa-person strong,.ptb-mpa-person small { display:block; }
.ptb-mpa-person small { color:var(--ptb-muted-2,#607274); margin-top:4px; }
.ptb-mpa-row-actions { display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
.ptb-btn.small { min-height:34px; padding:7px 10px; font-size:12px; }
.ptb-list-row[href] { text-decoration:none; }
.ptb-list-row[href]:hover { background:rgba(157,248,255,.035); }
.ptb-mpa-signal-map { min-height:360px; }
.ptb-mpa-study-grid,.ptb-mpa-quality-grid,.ptb-mpa-collab-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; }
.ptb-mpa-study-head,.ptb-mpa-quality-head,.ptb-mpa-collab-head { display:flex; justify-content:space-between; gap:14px; align-items:flex-start; }
.ptb-mpa-study-head h3,.ptb-mpa-quality-head h3,.ptb-mpa-collab-grid h3 { margin:14px 0 6px; font-size:22px; letter-spacing:-.035em; }
.ptb-mpa-study-head p,.ptb-mpa-quality-head p,.ptb-mpa-collab-grid p { color:var(--ptb-muted,#91a5a7); margin:0; line-height:1.55; }
.ptb-mpa-study-stats { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; margin:18px 0; }
.ptb-mpa-study-stats > div { padding:11px; border:1px solid rgba(255,255,255,.09); border-radius:13px; background:rgba(0,0,0,.18); }
.ptb-mpa-study-stats span { display:block; color:var(--ptb-muted-2,#607274); font-size:10px; text-transform:uppercase; letter-spacing:.1em; }
.ptb-mpa-study-stats strong { display:block; margin-top:6px; color:var(--ptb-text,#eef9f7); font-size:13px; }
.ptb-mpa-protocol-groups { display:grid; gap:18px; }
.ptb-mpa-protocol-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; }
.ptb-mpa-protocol-grid article { display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:14px; padding:16px; border:1px solid rgba(255,255,255,.09); border-radius:18px; background:rgba(255,255,255,.025); }
.ptb-mpa-protocol-grid code { color:#9df8ff; font-size:10px; }
.ptb-mpa-protocol-grid h4 { margin:5px 0; font-size:16px; }
.ptb-mpa-protocol-grid p { margin:0; color:var(--ptb-muted,#91a5a7); font-size:13px; line-height:1.5; }
.ptb-mpa-binding-list { display:grid; gap:8px; }
.ptb-mpa-binding-list > div { display:grid; grid-template-columns:minmax(130px,.45fr) 1fr auto; gap:12px; align-items:center; padding:11px 0; border-bottom:1px solid rgba(255,255,255,.08); }
.ptb-mpa-binding-list code { color:#9df8ff; }
.ptb-mpa-binding-list span strong,.ptb-mpa-binding-list span small { display:block; }
.ptb-mpa-binding-list span small { color:var(--ptb-muted-2,#607274); margin-top:4px; }
.ptb-mpa-binding-list b { color:var(--ptb-muted,#91a5a7); font-size:12px; }
.ptb-mpa-provenance-chain { display:grid; gap:10px; margin-bottom:18px; }
.ptb-mpa-provenance-chain > div { display:grid; grid-template-columns:38px 1fr; gap:4px 12px; padding:13px; border:1px solid rgba(255,255,255,.09); border-radius:15px; background:rgba(0,0,0,.16); }
.ptb-mpa-provenance-chain span { grid-row:1/3; width:34px; height:34px; border-radius:999px; display:grid; place-items:center; border:1px solid rgba(157,248,255,.26); color:#9df8ff; font:700 11px/1 ui-monospace,monospace; }
.ptb-mpa-provenance-chain strong { color:var(--ptb-text,#eef9f7); }
.ptb-mpa-provenance-chain p { margin:3px 0 0; color:var(--ptb-muted,#91a5a7); font-size:12px; line-height:1.5; }
.ptb-mpa-session-grid { display:grid; gap:16px; }
.ptb-mpa-session-grid article { display:grid; grid-template-columns:100px 1fr; gap:20px; }
.ptb-mpa-session-date { display:grid; place-items:center; align-content:center; min-height:150px; border:1px solid rgba(157,248,255,.18); border-radius:18px; background:rgba(157,248,255,.05); }
.ptb-mpa-session-date strong { font-size:44px; line-height:1; }
.ptb-mpa-session-date span { color:#9df8ff; text-transform:uppercase; letter-spacing:.14em; font-size:11px; margin-top:6px; }
.ptb-mpa-session-copy h3 { margin:14px 0 6px; font-size:24px; }
.ptb-mpa-session-copy > p { color:var(--ptb-muted,#91a5a7); }
.ptb-mpa-table-meter { display:flex; align-items:center; gap:8px; min-width:130px; }
.ptb-mpa-table-meter:before { content:""; flex:1; height:7px; border-radius:999px; background:rgba(255,255,255,.08); }
.ptb-mpa-table-meter span { position:absolute; display:none; }
.ptb-mpa-table-meter b { color:#9df8ff; }
.ptb-mpa-consent-grid { display:grid; gap:10px; }
.ptb-mpa-consent-grid > div { display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:12px; padding:13px; border:1px solid rgba(255,255,255,.08); border-radius:16px; background:rgba(255,255,255,.025); }
.ptb-mpa-consent-grid > div > span { width:38px; height:38px; border-radius:999px; display:grid; place-items:center; background:rgba(157,248,255,.08); color:#9df8ff; font-weight:800; }
.ptb-mpa-consent-grid p { margin:5px 0 0; color:var(--ptb-muted,#91a5a7); font-size:12px; }
.ptb-mpa-quality-head > strong { color:#9df8ff; font-size:34px; }
.ptb-mpa-output-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; }
.ptb-mpa-output-grid article { padding:18px; border:1px solid rgba(255,255,255,.09); border-radius:18px; background:rgba(255,255,255,.025); }
.ptb-mpa-output-grid h3 { margin:14px 0 6px; }
.ptb-mpa-output-grid p { color:var(--ptb-muted,#91a5a7); }
.ptb-mpa-output-foot { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:18px; }
.ptb-mpa-output-foot > strong { color:#9df8ff; }

/* Reusable engine pages */
.ptb-mpa-system-strip { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; margin-bottom:18px; }
.ptb-mpa-system-strip button { text-align:left; padding:15px; border:1px solid rgba(255,255,255,.1); border-radius:17px; background:rgba(255,255,255,.025); color:var(--ptb-text,#eef9f7); cursor:pointer; }
.ptb-mpa-system-strip button.active { border-color:rgba(157,248,255,.48); background:rgba(157,248,255,.075); box-shadow:inset 3px 0 0 #9df8ff; }
.ptb-mpa-system-strip span,.ptb-mpa-system-strip small { display:block; }
.ptb-mpa-system-strip span { font-weight:800; }
.ptb-mpa-system-strip small { color:var(--ptb-muted,#91a5a7); margin-top:6px; line-height:1.45; }
.ptb-mpa-workspace-controls { display:flex; align-items:stretch; justify-content:space-between; gap:14px; margin-bottom:14px; }
.ptb-mpa-model-rail { display:flex; gap:7px; flex-wrap:wrap; }
.ptb-mpa-model-rail button { min-width:72px; min-height:58px; display:flex; flex-direction:column; justify-content:center; align-items:center; gap:5px; border:1px solid rgba(255,255,255,.1); border-radius:14px; background:rgba(255,255,255,.025); color:var(--ptb-muted,#91a5a7); cursor:pointer; }
.ptb-mpa-model-rail button.active { color:#eef9f7; border-color:rgba(157,248,255,.45); background:rgba(157,248,255,.08); box-shadow:inset 0 -3px 0 #9df8ff; }
.ptb-mpa-model-rail button i { color:#9df8ff; }
.ptb-mpa-model-rail button span { font-size:11px; }
.ptb-mpa-context-controls { display:flex; gap:10px; align-items:flex-end; flex-wrap:wrap; }
.ptb-mpa-context-controls label { min-width:190px; }
.ptb-mpa-context-controls label span { display:block; color:var(--ptb-muted-2,#607274); font-size:10px; letter-spacing:.12em; text-transform:uppercase; margin-bottom:6px; }
.ptb-mpa-engine-grid { display:grid; grid-template-columns:minmax(0,1.35fr) minmax(340px,.65fr); gap:16px; align-items:stretch; }
.ptb-mpa-engine-stage { min-height:720px; position:relative; overflow:hidden; padding:0; background:radial-gradient(circle at 50% 25%,rgba(157,248,255,.08),transparent 32%),#020405; }
.ptb-mpa-engine-viewport { min-height:720px; height:100%; }
.ptb-mpa-engine-stamp { position:absolute; left:18px; bottom:18px; z-index:8; display:grid; grid-template-columns:auto 1fr; gap:3px 10px; padding:12px 14px; border:1px solid rgba(157,248,255,.2); border-radius:15px; background:rgba(3,4,5,.76); backdrop-filter:blur(12px); box-shadow:0 18px 60px rgba(0,0,0,.35); }
.ptb-mpa-engine-stamp i { grid-row:1/3; color:#9df8ff; align-self:center; }
.ptb-mpa-engine-stamp span { color:var(--ptb-muted-2,#607274); font:700 9px/1 ui-monospace,monospace; text-transform:uppercase; letter-spacing:.12em; }
.ptb-mpa-engine-stamp strong { font-size:12px; }
.ptb-mpa-engine-inspector { padding:18px; min-height:720px; overflow:auto; }
.ptb-mpa-inspector-head h2 { margin:13px 0 7px; font-size:28px; letter-spacing:-.04em; }
.ptb-mpa-inspector-head code { color:#9df8ff; font-size:11px; word-break:break-word; }
.ptb-mpa-inspector-tabs { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:5px; margin:18px 0; }
.ptb-mpa-inspector-tabs button { padding:9px 5px; border:1px solid rgba(255,255,255,.09); border-radius:10px; background:rgba(255,255,255,.025); color:var(--ptb-muted,#91a5a7); font-size:11px; cursor:pointer; }
.ptb-mpa-inspector-tabs button.active { color:#eef9f7; border-color:rgba(157,248,255,.35); background:rgba(157,248,255,.07); }
.ptb-mpa-inspector-summary { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; margin-bottom:16px; }
.ptb-mpa-inspector-summary div { padding:11px; border:1px solid rgba(255,255,255,.08); border-radius:13px; background:rgba(0,0,0,.18); }
.ptb-mpa-inspector-summary span { display:block; color:var(--ptb-muted-2,#607274); font-size:9px; text-transform:uppercase; letter-spacing:.1em; }
.ptb-mpa-inspector-summary strong { display:block; margin-top:6px; font-size:13px; }
.ptb-mpa-evidence-list { display:grid; gap:9px; }
.ptb-mpa-evidence-list article { padding:12px; border:1px solid rgba(255,255,255,.08); border-radius:14px; background:rgba(255,255,255,.025); }
.ptb-mpa-evidence-list article > div { display:flex; justify-content:space-between; gap:8px; color:var(--ptb-muted-2,#607274); font-size:10px; }
.ptb-mpa-evidence-list article > div span { display:flex; align-items:center; gap:6px; }
.ptb-mpa-evidence-list article strong { display:block; margin:9px 0 5px; }
.ptb-mpa-evidence-list article p { margin:0; color:var(--ptb-muted,#91a5a7); font-size:12px; }
.ptb-mpa-evidence-list article p b { color:#9df8ff; }
.ptb-mpa-evidence-list article small { display:block; color:var(--ptb-muted-2,#607274); margin-top:7px; }
.ptb-mpa-derived-grid { display:grid; gap:10px; }
.ptb-mpa-derived-grid article { padding:14px; border:1px solid rgba(157,248,255,.16); border-radius:15px; background:rgba(157,248,255,.04); }
.ptb-mpa-derived-grid article > span { color:var(--ptb-muted-2,#607274); font-size:9px; text-transform:uppercase; letter-spacing:.12em; }
.ptb-mpa-derived-grid article > strong { display:block; color:#9df8ff; font-size:28px; margin:8px 0; }
.ptb-mpa-derived-grid article > strong em { font-size:11px; font-style:normal; margin-left:5px; }
.ptb-mpa-derived-grid h3 { margin:0 0 5px; font-size:15px; }
.ptb-mpa-derived-grid p,.ptb-mpa-protocol-card p { color:var(--ptb-muted,#91a5a7); line-height:1.55; font-size:12px; }
.ptb-mpa-protocol-card h3 { margin:14px 0 8px; }
.ptb-mpa-protocol-card ul { color:var(--ptb-muted,#91a5a7); padding-left:18px; line-height:1.7; }

@media(max-width:1260px){
  .ptb-mpa-page-hero,.ptb-mpa-engine-grid{grid-template-columns:1fr}
  .ptb-mpa-engine-stage,.ptb-mpa-engine-viewport,.ptb-mpa-engine-inspector{min-height:620px}
  .ptb-mpa-study-grid,.ptb-mpa-quality-grid,.ptb-mpa-collab-grid{grid-template-columns:1fr}
}
@media(max-width:1080px){
  .ptb-mobile-nav-toggle{display:flex}
  .ptb-nav-scroll{display:none}
  .ptb-nav-scroll.open{display:block}
  .ptb-mpa-system-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ptb-mpa-workspace-controls{flex-direction:column}
}
@media(max-width:760px){
  .ptb-mpa-page-hero{padding:20px}
  .ptb-mpa-hero-readouts,.ptb-mpa-study-stats,.ptb-mpa-protocol-grid,.ptb-mpa-output-grid,.ptb-mpa-system-strip{grid-template-columns:1fr}
  .ptb-mpa-protocol-grid article{grid-template-columns:1fr}
  .ptb-mpa-session-grid article{grid-template-columns:1fr}
  .ptb-mpa-session-date{min-height:100px}
  .ptb-mpa-binding-list>div{grid-template-columns:1fr}
  .ptb-mpa-inspector-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ptb-mpa-engine-stage,.ptb-mpa-engine-viewport,.ptb-mpa-engine-inspector{min-height:520px}
}
.ptb-signal-caption.right { right:14px; top:14px; text-align:right; }
.ptb-mpa-table-meter { position:relative; min-width:150px; height:24px; display:flex; align-items:center; justify-content:flex-end; padding-left:0; }
.ptb-mpa-table-meter:before { position:absolute; left:0; right:42px; height:7px; }
.ptb-mpa-table-meter span { display:block; position:absolute; left:0; height:7px; max-width:calc(100% - 42px); border-radius:999px; background:linear-gradient(90deg,#9df8ff,#d8b765); }
.ptb-mpa-table-meter b { position:relative; z-index:2; }
@media(max-width:920px){
  .ptb-mpa-shell { width:100%; min-height:100vh; height:auto; display:block; overflow:visible; }
  .ptb-mpa-shell .ptb-sidebar { display:block; width:100%; height:auto; position:relative; overflow:visible; border-right:0; border-bottom:1px solid var(--ptb-line); }
  .ptb-mpa-shell .ptb-main { height:auto; min-height:100vh; overflow:visible; }
  .ptb-mpa-shell .ptb-topbar { position:sticky; top:0; min-height:74px; z-index:30; }
  .ptb-mpa-shell .ptb-content { overflow:visible; }
  .ptb-mpa-shell .ptb-sidebar-footer { display:none; }
}
.ptb-mpa-shell input,
.ptb-mpa-shell select,
.ptb-mpa-shell textarea {
  min-height:40px;
  border:1px solid rgba(255,255,255,.14);
  border-radius:10px;
  background:linear-gradient(180deg,rgba(8,11,13,.98),rgba(3,4,5,.98));
  color:var(--ptb-text,#eef9f7);
  padding:9px 11px;
  outline:none;
  color-scheme:dark;
}
.ptb-mpa-shell input:focus,
.ptb-mpa-shell select:focus,
.ptb-mpa-shell textarea:focus { border-color:rgba(157,248,255,.55); box-shadow:0 0 0 3px rgba(157,248,255,.08); }
.ptb-mpa-shell option { background:#050708; color:#eef9f7; }
.ptb-mpa-shell ::placeholder { color:rgba(145,165,167,.56); }