/* ==========================================================================
   NetVyn Design System
   Custom component layer built on Bootstrap 5.3 primitives (grid, collapse,
   tabs, accordion, modal, toast). Bootstrap's default look is fully overridden.
   Every component below is token-driven and renders correctly in Light, Dark
   and System appearance.
   --------------------------------------------------------------------------
   1. Tokens          6. Cards
   2. Reset & type    7. Data display
   3. Layout          8. Navigation
   4. Buttons         9. Diagrams
   5. Badges         10. Forms, code, docs, footer
   ========================================================================== */

/* ============ 1. TOKENS ================================================== */
:root{
  --nv-r:3px;            /* base radius — deliberately tight, not pill-soft */
  --nv-r-lg:4px;
  --bs-border-radius:3px; --bs-border-radius-sm:2px; --bs-border-radius-lg:4px;
  --bs-body-font-family:'Manrope',system-ui,-apple-system,sans-serif;
  --nv-mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --nv-ease:cubic-bezier(.4,0,.2,1);
  --nv-s1:.25rem; --nv-s2:.5rem; --nv-s3:.75rem; --nv-s4:1rem;
  --nv-s5:1.5rem; --nv-s6:2rem; --nv-s7:3rem; --nv-s8:4.5rem;
}

[data-bs-theme="light"]{
  --nv-bg:#ffffff; --nv-bg-2:#f4f6fa; --nv-bg-3:#eaeef5;
  --nv-surface:#ffffff; --nv-surface-2:#f1f4f9; --nv-surface-3:#e7ecf4;
  --nv-code-bg:#10151d; --nv-code-fg:#c8d2e0;
  --nv-text:#111621; --nv-text-2:#5a6473; --nv-text-3:#828d9c;
  --nv-border:#e1e6ee; --nv-border-strong:#c9d1dd;
  --nv-accent:#1450d4; --nv-accent-hover:#0d3fae; --nv-accent-muted:rgba(20,80,212,.08);
  --nv-accent-line:rgba(20,80,212,.35); --nv-on-accent:#ffffff;
  --nv-ok:#1c8a62; --nv-ok-bg:rgba(28,138,98,.09);
  --nv-warn:#9a6c10; --nv-warn-bg:rgba(154,108,16,.1);
  --nv-err:#c0392f; --nv-err-bg:rgba(192,57,47,.08);
  --nv-lift:0 1px 2px rgba(16,22,32,.05);
  --nv-lift-2:0 4px 16px -6px rgba(16,22,32,.18);
  --bs-body-bg:var(--nv-bg); --bs-body-color:var(--nv-text);
  --bs-border-color:var(--nv-border);
  --bs-primary:#1450d4; --bs-primary-rgb:20,80,212;
  --bs-link-color:var(--nv-accent); --bs-link-hover-color:var(--nv-accent-hover);
  --bs-link-color-rgb:20,80,212;
  --bs-emphasis-color:var(--nv-text);
}

[data-bs-theme="dark"]{
  --nv-bg:#0e1116; --nv-bg-2:#0a0f18; --nv-bg-3:#111823;
  --nv-surface:#13181f; --nv-surface-2:#181e27; --nv-surface-3:#1e2530;
  --nv-code-bg:#0b0f15; --nv-code-fg:#c8d2e0;
  --nv-text:#e9edf3; --nv-text-2:#98a3b3; --nv-text-3:#6c7787;
  --nv-border:#242c37; --nv-border-strong:#333d4a;
  --nv-accent:#4d8dff; --nv-accent-hover:#6fa2ff; --nv-accent-muted:rgba(77,141,255,.12);
  --nv-accent-line:rgba(77,141,255,.42); --nv-on-accent:#07101f;
  --nv-ok:#3fb98a; --nv-ok-bg:rgba(63,185,138,.12);
  --nv-warn:#d8a441; --nv-warn-bg:rgba(216,164,65,.12);
  --nv-err:#e2685f; --nv-err-bg:rgba(226,104,95,.12);
  --nv-lift:0 1px 2px rgba(0,0,0,.4);
  --nv-lift-2:0 8px 24px -10px rgba(0,0,0,.7);
  --bs-body-bg:var(--nv-bg); --bs-body-color:var(--nv-text);
  --bs-border-color:var(--nv-border);
  --bs-primary:#4d8dff; --bs-primary-rgb:77,141,255;
  --bs-link-color:var(--nv-accent); --bs-link-hover-color:var(--nv-accent-hover);
  --bs-link-color-rgb:77,141,255;
  --bs-emphasis-color:var(--nv-text);
}

/* ============ 2. RESET & TYPE =========================================== */
*{box-sizing:border-box}
body{background:var(--nv-bg);color:var(--nv-text);-webkit-font-smoothing:antialiased;text-wrap:pretty}
::selection{background:var(--nv-accent-muted)}
:focus-visible{outline:2px solid var(--nv-accent);outline-offset:2px}
a{text-decoration:none}
h1,h2,h3,h4,h5,h6{letter-spacing:-.025em;font-weight:700;color:var(--nv-text)}
h1{font-weight:800;letter-spacing:-.033em}
.display-4,.display-5,.display-6{font-weight:800;letter-spacing:-.035em;line-height:1.06}
.mono{font-family:var(--nv-mono)}
.text-2{color:var(--nv-text-2)!important}
.text-3{color:var(--nv-text-3)!important}
.text-accent{color:var(--nv-accent)!important}
.bg-2{background:var(--nv-bg-2)}
.bg-3{background:var(--nv-bg-3)}
.surface{background:var(--nv-surface)}
.hr-t{border-top:1px solid var(--nv-border)}
.hr-b{border-bottom:1px solid var(--nv-border)}
.hr-e{border-right:1px solid var(--nv-border)}
.lead-2{font-size:clamp(1.02rem,1.35vw,1.125rem);line-height:1.65;color:var(--nv-text-2)}
.small-2{font-size:.875rem;line-height:1.6;color:var(--nv-text-2)}
.eyebrow{font-family:var(--nv-mono);font-size:.72rem;font-weight:500;letter-spacing:.14em;
  text-transform:uppercase;color:var(--nv-accent);margin-bottom:1rem}
.eyebrow-2{color:var(--nv-text-3)}
.kbd{font-family:var(--nv-mono);font-size:.78rem;padding:.15rem .4rem;border:1px solid var(--nv-border-strong);
  border-bottom-width:2px;border-radius:3px;background:var(--nv-surface-2);color:var(--nv-text)}

/* ============ 3. LAYOUT ================================================= */
/* Bootstrap gutter reconciliation: .g-5 rows set --bs-gutter-x:3rem, so the
   container must match or those rows overhang and the page scrolls sideways. */
.container-xxl{--bs-gutter-x:3rem}
@media (max-width:575.98px){.container-xxl{--bs-gutter-x:2.5rem}}

.sec{padding:clamp(3.5rem,7vw,6.5rem) 0}
.sec-sm{padding:clamp(2.5rem,5vw,4.5rem) 0}
.sec-xs{padding:clamp(1.75rem,3vw,2.75rem) 0}

/* section header: eyebrow + title + lead + trailing action */
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:var(--nv-s5);margin-bottom:clamp(2rem,4vw,3.25rem)}
.sec-head > div:first-child{max-width:62ch}
.sec-head h2{font-size:clamp(1.6rem,3.1vw,2.5rem);line-height:1.14;margin:0}
.sec-head p{margin:1.15rem 0 0}
.sec-head-c{flex-direction:column;align-items:center;text-align:center}
.sec-head-c > div:first-child{max-width:60ch}

/* rule with a label, used to separate long pages */
.rule{display:flex;align-items:center;gap:1rem;margin:0}
.rule::after{content:"";flex:1;height:1px;background:var(--nv-border)}
.rule span{font-family:var(--nv-mono);font-size:.7rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--nv-text-3)}

/* hairline grid: flat panels separated by 1px, no floating shadows */
.nv-grid{display:grid;gap:1px;background:var(--nv-border);border:1px solid var(--nv-border)}
.nv-grid > *{background:var(--nv-bg);padding:1.7rem 1.6rem;margin:0}
/* anchor children behave as cards: content top, link pinned to the bottom so
   a row of tiles lines up regardless of paragraph length */
.nv-grid > a{display:flex;flex-direction:column;text-decoration:none}
.nv-grid > a .link-arrow{margin-top:auto;padding-top:1.1rem}
.nv-grid > a:hover h3{color:var(--nv-accent)}
.nv-grid.on-surface > *{background:var(--nv-surface)}
.g-2{grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr))}
.g-3{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.g-4{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}
.g-5c{grid-template-columns:repeat(auto-fit,minmax(min(100%,180px),1fr))}

.nv-panel{border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r)}
.nv-panel-2{border:1px solid var(--nv-border);background:var(--nv-bg-2);border-radius:var(--nv-r)}

/* ============ 4. BUTTONS ================================================ */
.btn{--bs-btn-border-radius:3px;font-weight:600;transition:background .15s var(--nv-ease),
  border-color .15s var(--nv-ease),color .15s var(--nv-ease)}
.btn-nv{background:var(--nv-accent);color:var(--nv-on-accent);border:1px solid var(--nv-accent);padding:.75rem 1.35rem}
.btn-nv:hover,.btn-nv:focus{background:var(--nv-accent-hover);border-color:var(--nv-accent-hover);color:var(--nv-on-accent)}
.btn-nv-outline{background:transparent;color:var(--nv-text);border:1px solid var(--nv-border-strong);padding:.75rem 1.35rem}
.btn-nv-outline:hover,.btn-nv-outline:focus{border-color:var(--nv-accent);color:var(--nv-accent)}
.btn-nv-ghost{background:transparent;color:var(--nv-accent);border:1px solid transparent;padding:.6rem .9rem}
.btn-nv-ghost:hover{background:var(--nv-accent-muted);color:var(--nv-accent)}
.btn-sm{padding:.5rem .85rem;font-size:.85rem}
.btn-lg{padding:.9rem 1.6rem;font-size:1rem}
/* inline text link with a trailing arrow that nudges on hover */
.link-arrow{font-weight:600;font-size:.925rem;color:var(--nv-accent);display:inline-flex;align-items:center;gap:.4rem}
.link-arrow::after{content:"\2192";transition:transform .15s var(--nv-ease)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ============ 5. BADGES & PILLS ========================================= */
.badge-nv{display:inline-flex;align-items:center;gap:.4rem;padding:.28rem .55rem;border-radius:2px;
  font-family:var(--nv-mono);font-size:.7rem;font-weight:500;letter-spacing:.04em;
  border:1px solid var(--nv-border);background:var(--nv-surface-2);color:var(--nv-text-2)}
.badge-nv.accent{border-color:var(--nv-accent-line);background:var(--nv-accent-muted);color:var(--nv-accent)}
.badge-nv.ok{border-color:transparent;background:var(--nv-ok-bg);color:var(--nv-ok)}
.badge-nv.warn{border-color:transparent;background:var(--nv-warn-bg);color:var(--nv-warn)}
.badge-nv.dot::before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor}
.nv-chip{display:inline-block;padding:.3rem .55rem;border:1px solid var(--nv-border);border-radius:2px;
  font-family:var(--nv-mono);font-size:.71rem;font-weight:500;color:var(--nv-text-3);background:transparent}
a.nv-chip:hover{border-color:var(--nv-accent);color:var(--nv-accent)}
.nv-chip.on{border-color:var(--nv-accent);color:var(--nv-accent);background:var(--nv-accent-muted)}

/* ============ 6. CARDS ================================================== */
/* base product/feature card */
.card-nv{position:relative;display:flex;flex-direction:column;height:100%;
  border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r);
  padding:1.6rem;transition:border-color .15s var(--nv-ease),transform .15s var(--nv-ease)}
.card-nv h3{font-size:1.075rem;margin:0 0 .5rem}
.card-nv p{color:var(--nv-text-2);font-size:.9rem;line-height:1.6;margin:0}
.card-nv .link-arrow{margin-top:auto;padding-top:1rem;font-size:.875rem}
a.card-nv:hover{border-color:var(--nv-border-strong)}
a.card-nv:hover h3{color:var(--nv-accent)}
/* accent rail on hover — the one motion allowance */
.card-nv::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--nv-accent);
  opacity:0;transition:opacity .15s var(--nv-ease)}
a.card-nv:hover::before{opacity:1}

/* mono index or glyph badge inside a card */
.card-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
  border:1px solid var(--nv-border);border-radius:2px;background:var(--nv-bg-2);margin-bottom:1rem;
  font-family:var(--nv-mono);font-size:.75rem;font-weight:600;color:var(--nv-accent)}

/* stat / metric card — capability text allowed where no verified number exists */
.stat-card{border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r);padding:1.5rem}
.stat-card .val{display:block;font-family:var(--nv-mono);font-size:clamp(1.5rem,2.6vw,2rem);
  font-weight:600;letter-spacing:-.02em;color:var(--nv-text);line-height:1.1}
.stat-card .val small{font-size:.55em;font-weight:500;color:var(--nv-text-3);margin-left:.25rem}
.stat-card .lbl{display:block;margin-top:.6rem;font-family:var(--nv-mono);font-size:.7rem;
  letter-spacing:.11em;text-transform:uppercase;color:var(--nv-text-3)}
.stat-card .note{display:block;margin-top:.75rem;font-size:.82rem;line-height:1.55;color:var(--nv-text-2)}

/* OS / platform card */
.os-card{display:flex;flex-direction:column;align-items:flex-start;gap:1rem;height:100%;
  border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r);
  padding:1.75rem;transition:border-color .15s var(--nv-ease)}
.os-card:hover{border-color:var(--nv-border-strong)}
.os-logo{width:100%;height:96px;display:flex;align-items:center;justify-content:center;
  border:1px dashed var(--nv-border-strong);border-radius:2px;background:var(--nv-bg-2);
  overflow:hidden}
.os-logo img{max-width:70%;max-height:64px;object-fit:contain}
.os-logo .slot{font-family:var(--nv-mono);font-size:.68rem;letter-spacing:.08em;color:var(--nv-text-3);text-align:center;padding:.5rem}
.os-card h3{font-size:1.15rem;margin:0}
.os-card .ver{font-family:var(--nv-mono);font-size:.78rem;color:var(--nv-text-3)}
.os-card p{font-size:.875rem;line-height:1.6;color:var(--nv-text-2);margin:0}

/* pricing card */
.price-card{display:flex;flex-direction:column;height:100%;border:1px solid var(--nv-border);
  background:var(--nv-surface);border-radius:var(--nv-r);padding:1.85rem}
.price-card.featured{border-color:var(--nv-accent);box-shadow:inset 0 0 0 1px var(--nv-accent-muted)}
.price-card .tier{font-family:var(--nv-mono);font-size:.72rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--nv-accent)}
.price-card .amount{display:block;margin:1rem 0 .35rem;font-size:1.6rem;font-weight:700;letter-spacing:-.02em}
.price-card ul{list-style:none;margin:1.35rem 0 1.75rem;padding:0;display:grid;gap:.65rem}
.price-card li{display:flex;gap:.6rem;font-size:.875rem;line-height:1.55;color:var(--nv-text-2)}
.price-card li::before{content:"\2713";color:var(--nv-ok);font-size:.8rem;flex:0 0 auto;margin-top:.15rem}
.price-card .btn{margin-top:auto}

/* CTA band */
.cta-band{border:1px solid var(--nv-border);background:var(--nv-bg-2);border-radius:var(--nv-r);
  padding:clamp(2rem,4vw,3.25rem)}
.cta-band.accent{border-color:var(--nv-accent-line);background:var(--nv-accent-muted)}

/* ---- native Bootstrap components, restyled ----
   These are Bootstrap's own classes (.card, .list-group, .progress, .nav-tabs,
   .accordion, .badge, .table) re-skinned to the Netvyn tokens, so pages can use
   standard Bootstrap markup without inheriting Bootstrap's default look. */
.card{--bs-card-bg:var(--nv-surface);--bs-card-border-color:var(--nv-border);
  --bs-card-border-radius:var(--nv-r);--bs-card-inner-border-radius:2px;
  --bs-card-cap-bg:var(--nv-bg-2);--bs-card-color:var(--nv-text);
  --bs-card-spacer-y:1.5rem;--bs-card-spacer-x:1.5rem;--bs-card-cap-padding-y:.85rem}
.card-header{font-family:var(--nv-mono);font-size:.7rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--nv-text-3);display:flex;align-items:center;
  justify-content:space-between;gap:.75rem;flex-wrap:wrap}
.card-title{font-size:1.05rem;font-weight:700;letter-spacing:-.02em}
.card-subtitle{font-family:var(--nv-mono);font-size:.75rem;color:var(--nv-text-3)}
.card-text{color:var(--nv-text-2);font-size:.9rem;line-height:1.6}
.card-footer{background:var(--nv-bg-2);border-color:var(--nv-border);padding:.85rem 1.5rem}
a.card{text-decoration:none;transition:border-color .15s var(--nv-ease)}
a.card:hover{border-color:var(--nv-border-strong)}
a.card:hover .card-title{color:var(--nv-accent)}

.list-group{--bs-list-group-bg:var(--nv-surface);--bs-list-group-border-color:var(--nv-border);
  --bs-list-group-color:var(--nv-text);--bs-list-group-border-radius:var(--nv-r);
  --bs-list-group-action-hover-bg:var(--nv-surface-2);--bs-list-group-action-hover-color:var(--nv-accent);
  --bs-list-group-item-padding-y:.85rem;--bs-list-group-item-padding-x:1.1rem;
  --bs-list-group-active-bg:var(--nv-accent-muted);--bs-list-group-active-border-color:var(--nv-border);
  --bs-list-group-active-color:var(--nv-accent)}
.list-group-item{font-size:.9rem}
.list-group-item .mono{font-size:.75rem}

.progress{--bs-progress-bg:var(--nv-surface-3);--bs-progress-border-radius:2px;
  --bs-progress-height:5px;--bs-progress-bar-bg:var(--nv-accent);
  --bs-progress-bar-transition:width .6s var(--nv-ease)}
.progress-stack{display:grid;gap:.9rem}
.progress-row{display:grid;grid-template-columns:1fr auto;gap:.4rem 1rem;align-items:baseline}
.progress-row .k{font-family:var(--nv-mono);font-size:.76rem;color:var(--nv-text-2)}
.progress-row .v{font-family:var(--nv-mono);font-size:.76rem;color:var(--nv-text-3)}
.progress-row .progress{grid-column:1/-1}

.badge{--bs-badge-border-radius:2px;font-family:var(--nv-mono);font-weight:500;letter-spacing:.04em}
.text-bg-accent{background:var(--nv-accent-muted)!important;color:var(--nv-accent)!important}

.nav-tabs{--bs-nav-tabs-border-color:var(--nv-border);--bs-nav-tabs-link-active-bg:transparent;
  --bs-nav-tabs-link-active-color:var(--nv-accent);--bs-nav-tabs-link-active-border-color:transparent transparent var(--nv-accent);
  --bs-nav-link-color:var(--nv-text-2);--bs-nav-link-hover-color:var(--nv-text);
  --bs-nav-tabs-link-hover-border-color:transparent;--bs-nav-tabs-border-radius:0}
.nav-tabs .nav-link{border-width:0 0 2px 0;font-weight:600;font-size:.925rem;padding:.75rem 1rem}

.table{--bs-table-bg:transparent;--bs-table-color:var(--nv-text-2);
  --bs-table-border-color:var(--nv-border);--bs-table-striped-bg:var(--nv-bg-2);
  --bs-table-hover-bg:var(--nv-surface-2);font-size:.875rem}
.table > thead{--bs-table-color:var(--nv-text-3)}
.table > thead th{font-family:var(--nv-mono);font-weight:500;font-size:.72rem;
  letter-spacing:.1em;text-transform:uppercase}

/* ---- live log stream (animated) ---- */
.logs{border:1px solid var(--nv-border);background:var(--nv-code-bg);border-radius:var(--nv-r);overflow:hidden}
.logs-head{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:wrap;
  padding:.6rem .9rem;border-bottom:1px solid rgba(255,255,255,.09);
  font-family:var(--nv-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:#7d8798}
.logs-live{display:inline-flex;align-items:center;gap:.4rem;color:#3fb98a;letter-spacing:.08em}
.logs-live::before{content:"";width:6px;height:6px;border-radius:50%;background:#3fb98a;
  animation:nvpulse 1.6s ease-in-out infinite}
@keyframes nvpulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.8)}}
.logs-body{height:290px;overflow:hidden;padding:.85rem .9rem;display:flex;flex-direction:column;justify-content:flex-end;gap:.1rem}
.logs-body .ln{display:grid;grid-template-columns:auto auto 1fr;gap:.75rem;
  font-family:var(--nv-mono);font-size:.745rem;line-height:1.7;color:#c8d2e0;white-space:nowrap;
  opacity:0;animation:nvline .35s var(--nv-ease) forwards}
@keyframes nvline{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.logs-body .t{color:#5d6875}
.logs-body .lv{font-weight:600}
.logs-body .lv.i{color:#4d8dff}
.logs-body .lv.o{color:#3fb98a}
.logs-body .lv.w{color:#d8a441}
.logs-body .m{overflow:hidden;text-overflow:ellipsis;color:#9fadbd}
.logs-body .m b{color:#e9edf3;font-weight:500}
.logs-foot{display:flex;flex-wrap:wrap;gap:1.25rem;padding:.6rem .9rem;
  border-top:1px solid rgba(255,255,255,.09);font-family:var(--nv-mono);font-size:.7rem;color:#5d6875}
.caret::after{content:"_";animation:nvblink 1.1s step-end infinite;color:#4d8dff}
@keyframes nvblink{0%,49%{opacity:1}50%,100%{opacity:0}}

/* ---- scroll reveal (opt-in, cancelled under reduced motion) ---- */
[data-reveal]{opacity:0;transform:translateY(10px)}
[data-reveal].in{opacity:1;transform:none;transition:opacity .5s var(--nv-ease),transform .5s var(--nv-ease)}
[data-reveal].in[data-reveal-d="1"]{transition-delay:.07s}
[data-reveal].in[data-reveal-d="2"]{transition-delay:.14s}
[data-reveal].in[data-reveal-d="3"]{transition-delay:.21s}
@media (prefers-reduced-motion:reduce){[data-reveal]{opacity:1;transform:none}}

/* ---- product UI screenshot frame ---- */
.ui-frame img{display:block;width:100%;height:auto}

/* ============ 7. DATA DISPLAY =========================================== */
/* spec / comparison table */
.table-nv{width:100%;border-collapse:collapse}
.table-nv caption{caption-side:top;padding:0 0 .85rem;font-family:var(--nv-mono);font-size:.7rem;
  letter-spacing:.12em;text-transform:uppercase;color:var(--nv-text-3);text-align:left}
.table-nv th,.table-nv td{padding:.8rem .9rem;border-bottom:1px solid var(--nv-border);
  font-size:.875rem;vertical-align:top;text-align:left}
.table-nv thead th{font-family:var(--nv-mono);font-weight:500;font-size:.72rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--nv-text-3);background:var(--nv-bg-2);white-space:nowrap}
.table-nv tbody th{font-family:var(--nv-mono);font-weight:500;font-size:.8rem;color:var(--nv-text);width:34%}
.table-nv td{color:var(--nv-text-2)}
.table-nv tbody tr:last-child th,.table-nv tbody tr:last-child td{border-bottom:0}
.table-nv .yes{color:var(--nv-ok);font-weight:600}
.table-nv .no{color:var(--nv-text-3)}
.table-wrap{overflow-x:auto;border:1px solid var(--nv-border);border-radius:var(--nv-r);background:var(--nv-surface)}
.spec-table{width:100%;border-collapse:collapse}
.spec-table th,.spec-table td{padding:.7rem .25rem;border-bottom:1px solid var(--nv-border);
  font-size:.85rem;vertical-align:top;text-align:left}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0}
.spec-table th{width:38%;font-family:var(--nv-mono);font-weight:500;font-size:.78rem;color:var(--nv-text-3)}
.spec-table td{color:var(--nv-text-2)}

/* stepper — subscriber lifecycle, install flow */
.stepper{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));
  gap:1px;background:var(--nv-border);border:1px solid var(--nv-border);border-radius:var(--nv-r);overflow:hidden}
.step{position:relative;background:var(--nv-surface);padding:1.4rem 1.25rem}
.step .n{font-family:var(--nv-mono);font-size:.7rem;letter-spacing:.1em;color:var(--nv-accent)}
.step h3{font-size:.95rem;margin:.65rem 0 .4rem}
.step p{font-size:.8rem;line-height:1.55;color:var(--nv-text-2);margin:0}
.step::after{content:"";position:absolute;right:-1px;top:50%;width:9px;height:9px;
  border-top:1px solid var(--nv-accent-line);border-right:1px solid var(--nv-accent-line);
  transform:translate(50%,-50%) rotate(45deg);background:var(--nv-surface);z-index:2}
.step:last-child::after{display:none}
@media (max-width:575.98px){
  .step::after{right:50%;top:auto;bottom:-1px;transform:translate(50%,50%) rotate(135deg)}
}

/* timeline — release history, deployment phases */
.timeline{list-style:none;margin:0;padding:0 0 0 1.5rem;border-left:1px solid var(--nv-border)}
.timeline li{position:relative;padding:0 0 1.75rem 0}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:calc(-1.5rem - 4px);top:.4rem;width:7px;height:7px;
  border-radius:50%;background:var(--nv-accent)}
.timeline .when{font-family:var(--nv-mono);font-size:.72rem;letter-spacing:.08em;color:var(--nv-text-3)}
.timeline h3{font-size:.98rem;margin:.35rem 0 .4rem}
.timeline p{font-size:.875rem;line-height:1.6;color:var(--nv-text-2);margin:0}

/* progress / capacity meter */
.meter{height:4px;background:var(--nv-surface-3);border-radius:2px;overflow:hidden}
.meter i{display:block;height:100%;background:var(--nv-accent)}

/* spec list with mono bullets */
.nv-specs{list-style:none;margin:0;padding:0;display:grid;gap:.7rem}
.nv-specs li{display:flex;gap:.7rem;font-family:var(--nv-mono);font-size:.83rem;line-height:1.6;color:var(--nv-text-2)}
.nv-specs li::before{content:"\00B7";color:var(--nv-accent)}
.nv-checks{list-style:none;margin:0;padding:0;display:grid;gap:.75rem}
.nv-checks li{display:flex;gap:.7rem;font-size:.925rem;line-height:1.6;color:var(--nv-text-2)}
.nv-checks li > span{flex:1}   /* wrap mixed inline content so it stays one item */
.nv-checks li::before{content:"\2013";color:var(--nv-accent);font-family:var(--nv-mono)}

/* alert */
.alert-nv{display:flex;gap:.9rem;padding:1rem 1.15rem;border:1px solid var(--nv-border);
  border-left-width:2px;border-left-color:var(--nv-accent);border-radius:var(--nv-r);
  background:var(--nv-surface);font-size:.9rem;line-height:1.6;color:var(--nv-text-2)}
.alert-nv strong{color:var(--nv-text);font-weight:600}
.alert-nv.ok{border-left-color:var(--nv-ok);background:var(--nv-ok-bg)}
.alert-nv.warn{border-left-color:var(--nv-warn);background:var(--nv-warn-bg)}

/* capability strip */
.nv-strip{display:flex;flex-wrap:wrap;align-items:center;background:var(--nv-bg-2)}
.nv-strip span{padding:1.1rem 1.35rem;border-left:1px solid var(--nv-border);font-family:var(--nv-mono);
  font-size:.82rem;font-weight:600;color:var(--nv-text-2)}
.nv-strip span:first-child{border-left:0;padding-left:0;font-weight:500;font-size:.72rem;
  letter-spacing:.1em;text-transform:uppercase;color:var(--nv-text-3)}

/* ============ 8. NAVIGATION ============================================= */
/* Brand lockup. Two variants, swapped on the theme attribute rather than
   prefers-color-scheme, so the in-page appearance toggle controls it too.
   The logo contains the wordmark, so no text sits beside it. */
.nv-logo{display:block;height:28px;width:auto}
.nv-footer .nv-logo{height:24px}
[data-bs-theme="light"] .nv-logo-dark{display:none}
[data-bs-theme="dark"]  .nv-logo-light{display:none}
@media (max-width:575.98px){.nv-logo{height:24px}}
.nv-navbar{background:var(--nv-bg);border-bottom:1px solid var(--nv-border)}
.nv-navbar .navbar-brand{font-weight:800;letter-spacing:-.03em;color:var(--nv-text)}
.nv-navbar .nav-link{color:var(--nv-text-2);font-weight:500;font-size:.925rem;padding:.5rem .7rem;border-radius:3px}
.nv-navbar .nav-link:hover{color:var(--nv-text);background:var(--nv-surface-2)}
.nv-navbar .nav-link.active{color:var(--nv-accent);background:var(--nv-accent-muted)}
.nv-mark{width:11px;height:11px;border:2px solid var(--nv-accent);border-radius:50%;display:inline-block}
.nv-theme{border:1px solid var(--nv-border);border-radius:4px;padding:2px}
.nv-theme .btn{width:34px;height:30px;padding:0;line-height:1;border:0;background:transparent;
  color:var(--nv-text-3);border-radius:2px}
.nv-theme .btn.active,.nv-theme .btn:hover{background:var(--nv-surface-2);color:var(--nv-accent)}

/* mega-menu dropdown */
.nv-navbar .dropdown-menu{border:1px solid var(--nv-border);border-radius:var(--nv-r);background:var(--nv-surface);
  padding:.5rem;box-shadow:var(--nv-lift-2);min-width:260px}
.nv-navbar .dropdown-item{border-radius:2px;padding:.55rem .7rem;color:var(--nv-text-2);font-size:.9rem;font-weight:500}
.nv-navbar .dropdown-item:hover,.nv-navbar .dropdown-item:focus{background:var(--nv-surface-2);color:var(--nv-accent)}
/* current page in the mega-menu — a tinted row, not Bootstrap's solid blue bar */
.nv-navbar .dropdown-item.active,.nv-navbar .dropdown-item:active{
  background:var(--nv-accent-muted);color:var(--nv-accent);
  box-shadow:inset 2px 0 0 var(--nv-accent)}
.nv-navbar .dropdown-item.active small{color:var(--nv-text-2)}
.nv-navbar .dropdown-item small{display:block;font-weight:400;font-size:.76rem;color:var(--nv-text-3)}
.nv-navbar .dropdown-header{font-family:var(--nv-mono);font-size:.66rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--nv-text-3);padding:.6rem .7rem .3rem}

/* breadcrumb */
.nv-crumb{font-family:var(--nv-mono);font-size:.78rem;color:var(--nv-text-3);margin-bottom:1.5rem}
.nv-crumb a{color:var(--nv-text-3)}
.nv-crumb a:hover{color:var(--nv-accent)}

/* underline tabs */
.nv-tabs{display:flex;flex-wrap:wrap;gap:.25rem;border-bottom:1px solid var(--nv-border);margin-bottom:2rem}
.nv-tabs .nav-link{border:0;border-bottom:2px solid transparent;border-radius:0;padding:.75rem 1rem;
  font-weight:600;font-size:.925rem;color:var(--nv-text-2);background:transparent}
.nv-tabs .nav-link:hover{color:var(--nv-text)}
.nv-tabs .nav-link.active{color:var(--nv-accent);border-bottom-color:var(--nv-accent);background:transparent}

/* segmented pill nav */
.nv-pills{display:inline-flex;flex-wrap:wrap;gap:2px;padding:3px;border:1px solid var(--nv-border);border-radius:4px}
.nv-pills .nav-link{border-radius:2px;padding:.5rem .95rem;font-size:.875rem;font-weight:600;
  color:var(--nv-text-2);background:transparent}
.nv-pills .nav-link:hover{color:var(--nv-text)}
.nv-pills .nav-link.active{background:var(--nv-surface-2);color:var(--nv-accent)}

/* accordion */
.accordion-nv .accordion-item{border:1px solid var(--nv-border);border-radius:var(--nv-r)!important;
  background:var(--nv-surface);margin-bottom:.6rem;overflow:hidden}
.accordion-nv .accordion-button{background:var(--nv-surface);color:var(--nv-text);font-weight:600;
  font-size:.975rem;padding:1.05rem 1.25rem;box-shadow:none}
.accordion-nv .accordion-button:not(.collapsed){background:var(--nv-surface-2);color:var(--nv-accent)}
.accordion-nv .accordion-button::after{width:.9rem;height:.9rem;background-size:.9rem}
.accordion-nv .accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-nv .accordion-body{padding:0 1.25rem 1.25rem;color:var(--nv-text-2);font-size:.925rem;line-height:1.7}

/* toast + modal */
.toast-nv{border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r);
  box-shadow:var(--nv-lift-2);color:var(--nv-text)}
.modal-nv .modal-content{border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r-lg)}
.modal-nv .modal-header,.modal-nv .modal-footer{border-color:var(--nv-border)}

/* ============ 9. DIAGRAMS =============================================== */
/* layered architecture figure */
.arch{border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r)}
.arch-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.75rem;
  padding:.9rem 1.25rem;border-bottom:1px solid var(--nv-border);
  font-family:var(--nv-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--nv-text-3)}
.arch-body{padding:.5rem clamp(1rem,3vw,1.75rem) 1.25rem}
.arch-row{display:grid;grid-template-columns:9.5rem 1fr;gap:clamp(1rem,2.5vw,2rem);
  align-items:center;padding:1.15rem 0;border-top:1px dashed var(--nv-border)}
.arch-row:first-child{border-top:0}
.arch-layer{font-family:var(--nv-mono);font-size:.7rem;line-height:1.5;text-align:right;color:var(--nv-text-3)}
.arch-layer b{display:block;font-weight:600;font-size:.72rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--nv-text-2)}
.arch-layer i{font-style:normal;color:var(--nv-accent);opacity:.65}
.arch-boxes{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,148px),1fr));gap:.6rem}
.arch-box{border:1px solid var(--nv-border-strong);background:var(--nv-bg-2);border-radius:2px;
  padding:.7rem .85rem;font-family:var(--nv-mono);font-size:.78rem;font-weight:600;color:var(--nv-text)}
.arch-box span{display:block;margin-top:.3rem;font-weight:400;font-size:.68rem;line-height:1.45;color:var(--nv-text-3)}
.arch-box.key{border-color:var(--nv-accent);background:var(--nv-accent-muted);color:var(--nv-accent)}
.arch-box.key span{color:var(--nv-text-2)}
.arch-box.wide{grid-column:1/-1}
.arch-foot{display:flex;flex-wrap:wrap;gap:1.5rem;padding:.85rem 1.25rem;
  border-top:1px solid var(--nv-border);font-family:var(--nv-mono);font-size:.7rem;color:var(--nv-text-3)}
.arch-foot em{font-style:normal;display:inline-flex;align-items:center;gap:.45rem}
.arch-foot em::before{content:"";width:14px;height:1px;background:var(--nv-accent-line)}
.arch-foot em.d::before{background:var(--nv-border-strong)}
@media (max-width:575.98px){
  .arch-row{grid-template-columns:1fr;gap:.6rem;padding:1rem 0}
  .arch-layer{text-align:left}
}

/* vertical flow diagram with animated packet indicators */
.dg{display:grid;justify-items:center;gap:0;max-width:820px;margin:0 auto}
.dg-node{border:1px solid var(--nv-border-strong);background:var(--nv-bg-2);border-radius:3px;
  padding:.75rem 1.5rem;font-family:var(--nv-mono);font-size:.8rem;font-weight:600;
  color:var(--nv-text);text-align:center;width:100%}
.dg-node small{display:block;margin-top:.35rem;font-weight:400;font-size:.7rem;color:var(--nv-text-3)}
.dg-node.key{border-color:var(--nv-accent);background:var(--nv-accent-muted);color:var(--nv-accent)}
.dg-link{width:1px;height:26px;background:var(--nv-accent-line)}
.dg-row{width:100%;display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.75rem}
.dg-flow{position:relative;height:34px;margin-left:24px;border-left:1px solid var(--nv-accent-line)}
.dg-flow i{position:absolute;left:-3px;width:5px;height:5px;border-radius:50%;background:var(--nv-accent);
  animation:nvpkt 2.2s linear infinite}
@keyframes nvpkt{0%{top:-4px;opacity:0}12%{opacity:1}88%{opacity:1}100%{top:100%;opacity:0}}

/* product UI preview frame */
.ui-frame{border:1px solid var(--nv-border);border-radius:var(--nv-r-lg);overflow:hidden;
  background:var(--nv-surface);box-shadow:var(--nv-lift-2)}
.ui-frame-bar{display:flex;align-items:center;gap:.5rem;padding:.65rem .9rem;
  border-bottom:1px solid var(--nv-border);background:var(--nv-bg-2)}
.ui-frame-bar i{width:9px;height:9px;border-radius:50%;background:var(--nv-border-strong)}
.ui-frame-bar span{margin-left:.5rem;font-family:var(--nv-mono);font-size:.72rem;color:var(--nv-text-3)}
.ui-slot{min-height:340px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:.6rem;padding:2rem;text-align:center;
  background-image:repeating-linear-gradient(135deg,var(--nv-bg-2) 0 10px,var(--nv-bg-3) 10px 20px)}
.ui-slot b{font-family:var(--nv-mono);font-size:.8rem;font-weight:600;color:var(--nv-text-2)}
.ui-slot small{font-family:var(--nv-mono);font-size:.72rem;color:var(--nv-text-3);max-width:44ch;line-height:1.6}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

/* ============ 10. FORMS, CODE, DOCS, FOOTER ============================= */
.form-control,.form-select{background:var(--nv-bg);border-color:var(--nv-border);color:var(--nv-text);padding:.7rem .75rem}
.form-control::placeholder{color:var(--nv-text-3)}
.form-control:focus,.form-select:focus{background:var(--nv-bg);color:var(--nv-text);border-color:var(--nv-accent);
  box-shadow:0 0 0 .2rem var(--nv-accent-muted)}
.form-label{font-size:.83rem;font-weight:500;color:var(--nv-text);margin-bottom:.35rem}
.form-hint{font-size:.78rem;color:var(--nv-text-3);margin-top:.3rem}
.form-check-input{background-color:var(--nv-bg);border-color:var(--nv-border-strong)}
.form-check-input:checked{background-color:var(--nv-accent);border-color:var(--nv-accent)}
.search-inline{position:relative}
.search-inline input{padding-left:2.1rem}
.search-inline::before{content:"\2315";position:absolute;left:.7rem;top:50%;transform:translateY(-50%);
  color:var(--nv-text-3);font-size:1rem;pointer-events:none}

.nv-code{border:1px solid var(--nv-border);background:var(--nv-code-bg);border-radius:var(--nv-r);overflow:hidden}
.nv-code-head{display:flex;justify-content:space-between;align-items:center;gap:.5rem;flex-wrap:wrap;
  padding:.6rem .9rem;border-bottom:1px solid rgba(255,255,255,.09);font-family:var(--nv-mono);
  font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:#7d8798}
.nv-code-head span{white-space:nowrap}
.nv-code pre{margin:0;padding:1.25rem 1.15rem;overflow-x:auto;color:var(--nv-code-fg);
  font-family:var(--nv-mono);font-size:.79rem;line-height:1.75}
.nv-code .p{color:#4d8dff}
.nv-code .c{color:#7d8798}
.nv-code .s{color:#3fb98a}
.nv-copy{border:1px solid rgba(255,255,255,.16);background:transparent;color:#c8d2e0;
  padding:.3rem .65rem;border-radius:2px;font-family:var(--nv-mono);font-size:.7rem;cursor:pointer}
.nv-copy:hover{border-color:#4d8dff;color:#4d8dff}
code:not(.nv-code code){font-family:var(--nv-mono);color:var(--nv-text);background:var(--nv-surface-2);
  padding:.1rem .3rem;border-radius:2px;font-size:.9em}

.docs-wrap{display:flex;flex-wrap:wrap;align-items:flex-start;max-width:1440px;margin:0 auto}
.docs-side{flex:1 1 250px;max-width:300px;border-right:1px solid var(--nv-border);
  padding:1.75rem 1.25rem 4rem;position:sticky;top:64px;max-height:calc(100vh - 64px);overflow-y:auto}
.docs-main{flex:4 1 440px;min-width:0;padding:clamp(1.75rem,4vw,2.75rem) clamp(1.25rem,4vw,3.5rem) 6rem}
.docs-toc{flex:1 1 190px;max-width:240px;border-left:1px solid var(--nv-border);
  padding:clamp(1.75rem,4vw,2.75rem) 1.5rem 4rem;position:sticky;top:64px}
.docs-side h2{font-family:var(--nv-mono);font-size:.68rem;font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;color:var(--nv-text-3);margin:0 0 .5rem}
.docs-side a{display:block;padding:.5rem .6rem;margin:0 -.6rem;border-radius:3px;
  font-size:.875rem;font-weight:500;color:var(--nv-text-2)}
.docs-side a:hover{background:var(--nv-surface-2);color:var(--nv-text)}
.docs-side a.active{color:var(--nv-accent);background:var(--nv-accent-muted)}
.docs-toc a{display:block;padding:.4rem 0;font-size:.85rem;color:var(--nv-text-2)}
.docs-toc a:hover{color:var(--nv-accent)}
.docs-main h2{font-size:clamp(1.25rem,2vw,1.4rem);margin:2.75rem 0 .85rem}
.docs-main p{color:var(--nv-text-2);line-height:1.7}
.docs-nav-toggle{display:none}
@media (max-width:991.98px){
  .docs-side,.docs-toc{position:static;max-height:none;max-width:100%;flex-basis:100%;border:0;
    border-bottom:1px solid var(--nv-border)}
  .docs-toc{display:none}
  .docs-side{padding:1rem 1.25rem}
  .docs-nav-toggle{display:flex;width:100%;align-items:center;justify-content:space-between;
    gap:.75rem;padding:.85rem 1rem;border:1px solid var(--nv-border);border-radius:3px;
    background:var(--nv-surface);color:var(--nv-text);font-weight:600;font-size:.925rem}
  .docs-nav-toggle::after{content:"\203A";transform:rotate(90deg);color:var(--nv-text-3);font-size:1.1rem}
  .docs-nav-toggle[aria-expanded="true"]::after{transform:rotate(-90deg)}
  #docsNav{padding-top:1rem}
}

.nv-footer{background:var(--nv-bg-2);border-top:1px solid var(--nv-border)}
.nv-footer h2{font-family:var(--nv-mono);font-size:.68rem;font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;color:var(--nv-text-3);margin-bottom:.9rem}
.nv-footer a{display:block;font-size:.875rem;color:var(--nv-text-2);padding:.28rem 0}
.nv-footer a:hover{color:var(--nv-accent)}
.nv-footer .legal a{display:inline-block;font-family:var(--nv-mono);font-size:.76rem;color:var(--nv-text-3)}

/* ============ 11. MOTION ================================================
   Interaction and entrance motion for the card/component set.
   Rules of the layer, deliberately narrow:
     - pointer feedback 130-180ms, entrance ~420ms, nothing longer
     - displacement never exceeds 8px; no scale bounce, no glow, no gradient
     - lift is reserved for elements that are actually clickable; static
       panels only change border or background
     - the entrance class is applied by script, so with JS disabled every
       element renders fully visible; prefers-reduced-motion and print both
       collapse the layer to a static page
   ====================================================================== */
:root{--nv-t-fast:.13s; --nv-t:.18s; --nv-t-slow:.42s}

html{scroll-behavior:smooth;scroll-padding-top:5rem}

/* ---- entrance -------------------------------------------------------- */
.nv-anim{opacity:0;transform:translateY(8px)}
.nv-anim.is-in{opacity:1;transform:none;
  transition:opacity var(--nv-t-slow) var(--nv-ease),transform var(--nv-t-slow) var(--nv-ease);
  transition-delay:calc(var(--nv-stagger,0) * 55ms)}
/* hairline grids and dashed rows: fade only — translating a child exposes
   the 1px border grid behind it and reads as a flicker */
.nv-grid > .nv-anim,.stepper > .nv-anim,.arch-body > .nv-anim,.nv-strip.nv-anim{transform:none}

/* ---- clickable surfaces: lift, pointer devices only ------------------- */
@media (hover:hover) and (pointer:fine){
  a.card-nv,a.card,.os-card,.os-plate,.price-card{
    transition:border-color var(--nv-t) var(--nv-ease),
               box-shadow var(--nv-t) var(--nv-ease),
               transform var(--nv-t) var(--nv-ease)}
  a.card-nv:hover,a.card:hover,.os-card:hover,.os-plate:hover,.price-card:hover{
    transform:translateY(-2px);box-shadow:var(--nv-lift-2);border-color:var(--nv-border-strong)}
  .price-card.featured:hover{border-color:var(--nv-accent)}
  a.card-nv:active,a.card:active{transform:translateY(0);box-shadow:var(--nv-lift);
    transition-duration:var(--nv-t-fast)}
  a.card-nv:hover .card-mark{border-color:var(--nv-accent-line);background:var(--nv-accent-muted)}
}
.card-mark{transition:border-color var(--nv-t) var(--nv-ease),background var(--nv-t) var(--nv-ease)}

/* ---- static surfaces: border or background only, never a lift --------- */
.stat-card,.nv-panel,.nv-panel-2,.arch-box{transition:border-color var(--nv-t) var(--nv-ease)}
.stat-card:hover,.arch-box:hover{border-color:var(--nv-border-strong)}
.nv-grid > *,.step{transition:background var(--nv-t) var(--nv-ease)}
.nv-grid > *:hover,.step:hover{background:var(--nv-surface-2)}
.step:hover::after{background:var(--nv-surface-2)}

/* ---- buttons and links ----------------------------------------------- */
.btn-nv,.btn-nv-outline,.btn-nv-ghost,.nv-copy{
  transition:background var(--nv-t-fast) var(--nv-ease),border-color var(--nv-t-fast) var(--nv-ease),
             color var(--nv-t-fast) var(--nv-ease),transform var(--nv-t-fast) var(--nv-ease)}
.btn-nv:active,.btn-nv-outline:active,.btn-nv-ghost:active,.nv-copy:active{transform:translateY(1px)}
.nv-chip{transition:border-color var(--nv-t-fast) var(--nv-ease),
  color var(--nv-t-fast) var(--nv-ease),background var(--nv-t-fast) var(--nv-ease)}

/* ---- navigation ------------------------------------------------------- */
.nv-navbar{transition:box-shadow var(--nv-t) var(--nv-ease)}
body.nv-scrolled .nv-navbar{box-shadow:var(--nv-lift-2)}
.nv-navbar .nav-link,.nv-navbar .dropdown-item,.docs-side a,.list-group-item-action{
  transition:background var(--nv-t-fast) var(--nv-ease),color var(--nv-t-fast) var(--nv-ease)}
.nv-navbar .dropdown-menu{animation:nv-drop .16s var(--nv-ease)}
@keyframes nv-drop{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.nv-tabs .nav-link,.nav-tabs .nav-link{
  transition:color var(--nv-t) var(--nv-ease),border-color var(--nv-t) var(--nv-ease)}
.nv-footer a{transition:color var(--nv-t-fast) var(--nv-ease),transform var(--nv-t-fast) var(--nv-ease)}
.nv-footer a:hover{transform:translateX(2px)}

/* ---- data display ----------------------------------------------------- */
.table-nv tbody tr{transition:background var(--nv-t-fast) var(--nv-ease)}
.table-nv tbody tr:hover{background:var(--nv-bg-2)}
.meter i{transition:width .7s var(--nv-ease)}
.timeline li::before{transition:transform var(--nv-t) var(--nv-ease)}
.timeline li:hover::before{transform:scale(1.35)}
.accordion-nv .accordion-button{transition:background var(--nv-t) var(--nv-ease),color var(--nv-t) var(--nv-ease)}
.accordion-nv .accordion-button::after{transition:transform var(--nv-t) var(--nv-ease)}
.form-control,.form-select{transition:border-color var(--nv-t-fast) var(--nv-ease),
  box-shadow var(--nv-t-fast) var(--nv-ease)}

/* ---- opt-outs ---------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .nv-anim,.nv-anim.is-in{opacity:1;transform:none;transition:none}
  .nv-navbar .dropdown-menu{animation:none}
}
@media print{.nv-anim,.nv-anim.is-in{opacity:1;transform:none}}

/* ============ 12. COMPOSITION & RICH COMPONENTS =========================
   The layer that carries visual weight. Everything here is built from the
   same primitives as the rest of the system — 1px borders, the surface
   tokens, mono labels — but composed into components with real information
   density, so the page reads as a product rather than a brochure.

   Nothing below depends on motion. With every animation disabled the
   hierarchy is carried entirely by type scale, hairline structure and the
   light/inset/plate band system.
   ====================================================================== */

/* ---- 12.1 editorial type scale ---------------------------------------- */
.h-xl{font-size:clamp(2.35rem,5.2vw,4.1rem);line-height:1.02;letter-spacing:-.042em;font-weight:800}
.h-lg{font-size:clamp(1.7rem,3.4vw,2.7rem);line-height:1.09;letter-spacing:-.034em;font-weight:800}
.h-md{font-size:clamp(1.25rem,2vw,1.6rem);line-height:1.2;letter-spacing:-.028em;font-weight:700}
.lede{font-size:clamp(1.04rem,1.45vw,1.2rem);line-height:1.62;color:var(--nv-text-2)}
.lede-sm{font-size:.95rem;line-height:1.65;color:var(--nv-text-2)}
.num-xl{font-family:var(--nv-mono);font-weight:600;line-height:1;letter-spacing:-.035em;
  font-size:clamp(1.9rem,3.8vw,3rem);color:var(--nv-text)}
.num-xl small{font-size:.4em;font-weight:500;letter-spacing:0;color:var(--nv-text-3);margin-left:.35rem}
.label{font-family:var(--nv-mono);font-size:.68rem;font-weight:500;letter-spacing:.14em;
  text-transform:uppercase;color:var(--nv-text-3)}
.label-a{color:var(--nv-accent)}

/* section marker: index + name + rule, gives every band an identity */
.sec-mark{display:flex;align-items:center;gap:.9rem;margin-bottom:clamp(1.5rem,3vw,2.25rem);
  font-family:var(--nv-mono);font-size:.69rem;font-weight:500;letter-spacing:.15em;
  text-transform:uppercase;color:var(--nv-text-3)}
.sec-mark b{color:var(--nv-accent);font-weight:600}
.sec-mark::after{content:"";flex:1 1 auto;height:1px;background:var(--nv-border)}

/* ---- 12.2 band system: the section rhythm ------------------------------ */
/* .band-inset = recessed, .band-plate = dark technical band. Alternating
   these is what stops eleven sections reading as one long scroll. */
.band-inset{background:var(--nv-bg-2);border-block:1px solid var(--nv-border)}
.band-plate{
  background:#0b0f15;
  --nv-bg:#0b0f15; --nv-bg-2:#10151d; --nv-bg-3:#141b24;
  --nv-surface:#131a24; --nv-surface-2:#182029; --nv-surface-3:#1e2731;
  --nv-text:#e9edf3; --nv-text-2:#9fadbd; --nv-text-3:#6c7787;
  --nv-border:rgba(255,255,255,.10); --nv-border-strong:rgba(255,255,255,.20);
  --nv-accent:#4d8dff; --nv-accent-hover:#6fa2ff; --nv-accent-muted:rgba(77,141,255,.12);
  --nv-accent-line:rgba(77,141,255,.42); --nv-on-accent:#07101f;
  --nv-ok:#3fb98a; --nv-ok-bg:rgba(63,185,138,.12);
  --nv-warn:#d8a441; --nv-warn-bg:rgba(216,164,65,.12);
  --nv-code-bg:#070b10;
  color:var(--nv-text)}
.band-plate h1,.band-plate h2,.band-plate h3,.band-plate h4,.band-plate .card-title{color:var(--nv-text)}
.band-plate .btn-nv-outline{color:var(--nv-text);border-color:var(--nv-border-strong)}

/* Vertical rules framing the hero.

   These were four equal fractions of the viewport, which put lines at 25/50/75%
   with no relationship to the content grid — one landed in the middle of the
   headline, another crossed the diagram. They now sit on the edges of the
   container's content box, so they frame the hero the way a drawing border
   would instead of cutting through it.

   Width matches .container-xxl: max-width 1320px minus its 3rem gutter. */
.rails{position:absolute;inset:0;display:flex;justify-content:center;
  pointer-events:none;z-index:0}
.rails::before{content:"";width:calc(min(100%, 1320px) - 3rem);
  border-left:1px solid var(--nv-border);border-right:1px solid var(--nv-border)}
.rails span{display:none}
@media (max-width:991.98px){.rails{display:none}}

/* ---- 12.3 hero -------------------------------------------------------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--nv-border)}
.hero > .container-xxl{position:relative;z-index:1}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1.5rem;
  padding-top:1.25rem;margin-top:1.75rem;border-top:1px solid var(--nv-border)}
.hero-meta dl{display:flex;flex-direction:column;gap:.2rem;margin:0}
.hero-meta dt{font-family:var(--nv-mono);font-size:.64rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--nv-text-3)}
.hero-meta dd{margin:0;font-family:var(--nv-mono);font-size:.83rem;font-weight:600;color:var(--nv-text)}

/* ---- 12.4 topology component ------------------------------------------ */
/* The hero visual. A real UI component: framed, headed, statused, with the
   gateway rendered as a service plane rather than a single box. */
.topo{border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r);
  overflow:hidden;box-shadow:var(--nv-lift)}
.topo-head,.topo-foot{display:flex;align-items:center;justify-content:space-between;
  gap:.75rem;flex-wrap:wrap;padding:.7rem .95rem;
  font-family:var(--nv-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--nv-text-3)}
.topo-head{border-bottom:1px solid var(--nv-border);background:var(--nv-bg-2)}
.topo-foot{border-top:1px solid var(--nv-border);background:var(--nv-bg-2);letter-spacing:.06em;text-transform:none}
.topo-foot em{font-style:normal;display:inline-flex;align-items:center;gap:.45rem}
.topo-foot em::before{content:"";width:16px;height:1px;background:var(--nv-accent-line)}
.topo-foot em.d::before{background:var(--nv-border-strong);height:0;border-top:1px dashed var(--nv-border-strong)}
.topo-body{padding:clamp(1rem,2.5vw,1.5rem)}
.topo-node{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  border:1px solid var(--nv-border-strong);background:var(--nv-bg-2);border-radius:2px;padding:.7rem .9rem}
.topo-node b{font-family:var(--nv-mono);font-size:.78rem;font-weight:600;letter-spacing:.06em;color:var(--nv-text)}
.topo-node span{font-size:.72rem;color:var(--nv-text-3);font-family:var(--nv-mono)}
/* connector rail, with an optional travelling packet indicator */
.topo-rail{position:relative;height:30px;margin-left:1.35rem;border-left:1px solid var(--nv-accent-line)}
.topo-rail i{position:absolute;left:-3px;width:5px;height:5px;border-radius:50%;
  background:var(--nv-accent);animation:nvpkt 2.2s linear infinite}
.topo-gw{border:1px solid var(--nv-accent);border-radius:2px;background:var(--nv-accent-muted);overflow:hidden}
.topo-gw-head{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:wrap;
  padding:.7rem .9rem;border-bottom:1px solid var(--nv-accent-line)}
.topo-gw-head b{font-family:var(--nv-mono);font-size:.82rem;font-weight:700;letter-spacing:.06em;color:var(--nv-accent)}
.topo-svc{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--nv-accent-line)}
.topo-cell{background:var(--nv-surface);padding:.6rem .7rem;min-width:0}
.topo-cell b{display:block;font-family:var(--nv-mono);font-size:.72rem;font-weight:600;color:var(--nv-text)}
.topo-cell span{display:block;margin-top:.15rem;font-size:.62rem;line-height:1.4;color:var(--nv-text-3)}
@media (max-width:399.98px){.topo-svc{grid-template-columns:repeat(2,1fr)}}

/* ---- 12.5 capability explorer ----------------------------------------- */
/* Horizontal capability navigation driving a detail panel. Replaces a
   nine-card grid with one component the visitor actually operates. */
.exp{border:1px solid var(--nv-border);border-radius:var(--nv-r);background:var(--nv-surface);overflow:hidden}
.exp-bar{display:flex;overflow-x:auto;overflow-y:hidden;background:var(--nv-bg-2);
  border-bottom:1px solid var(--nv-border);scrollbar-width:thin}
.exp-tab{position:relative;flex:0 0 auto;border:0;border-right:1px solid var(--nv-border);
  background:transparent;padding:.9rem 1.15rem;cursor:pointer;
  font-family:var(--nv-mono);font-size:.76rem;font-weight:600;letter-spacing:.06em;color:var(--nv-text-2)}
.exp-tab:hover{color:var(--nv-text);background:var(--nv-surface-2)}
.exp-tab[aria-selected="true"]{background:var(--nv-surface);color:var(--nv-accent)}
.exp-tab[aria-selected="true"]::after{content:"";position:absolute;inset:auto 0 -1px 0;height:2px;background:var(--nv-accent)}
.exp-panel{display:none;padding:clamp(1.4rem,3vw,2.25rem)}
.exp-panel[data-on]{display:block}
.exp-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:clamp(1.5rem,3vw,2.5rem);align-items:start}
@media (max-width:991.98px){.exp-split{grid-template-columns:1fr}}

/* ---- 12.6 bento -------------------------------------------------------- */
/* Deliberately unequal tiles. Weight follows importance, not the grid. */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;
  background:var(--nv-border);border:1px solid var(--nv-border);border-radius:var(--nv-r);overflow:hidden}
.bento > *{background:var(--nv-surface);padding:clamp(1.35rem,2.4vw,1.9rem);
  display:flex;flex-direction:column;min-width:0}
.bento > .lit{background:var(--nv-bg-2)}
.b2{grid-column:span 2}.b3{grid-column:span 3}.b4{grid-column:span 4}.b6{grid-column:span 6}
@media (max-width:991.98px){.bento{grid-template-columns:repeat(2,1fr)}
  .b2,.b3,.b4,.b6{grid-column:span 2}.b2.half{grid-column:span 1}}
@media (max-width:575.98px){.bento{grid-template-columns:1fr}
  .b2,.b3,.b4,.b6,.b2.half{grid-column:span 1}}
.tile-k{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-bottom:1rem}
.tile-k .label{margin:0}
.tile h3{font-size:1.15rem;letter-spacing:-.025em;margin:0 0 .55rem}
.tile p{color:var(--nv-text-2);font-size:.9rem;line-height:1.62;margin:0}
.tile-foot{margin-top:auto;padding-top:1.25rem}
.tile-rule{margin-top:1.25rem;padding-top:1.25rem;border-top:1px solid var(--nv-border)}

/* key/value strip used inside tiles and panels */
.kv{display:grid;gap:0;margin:0}
.kv > div{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;
  padding:.5rem 0;border-top:1px dashed var(--nv-border)}
.kv > div:first-child{border-top:0}
.kv dt{font-size:.83rem;color:var(--nv-text-2)}
.kv dd{margin:0;font-family:var(--nv-mono);font-size:.78rem;color:var(--nv-text);text-align:right}

/* ---- 12.7 product UI mockups ------------------------------------------- */
/* Hairline reconstructions of console views. Always carries a visible
   "representative view" mark — illustrative structure, never presented as
   live measurement. */
.mock{border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r-lg);overflow:hidden}
.mock-bar{display:flex;align-items:center;gap:.5rem;padding:.6rem .85rem;
  border-bottom:1px solid var(--nv-border);background:var(--nv-bg-2)}
.mock-bar i{width:8px;height:8px;border-radius:50%;background:var(--nv-border-strong);flex:0 0 auto}
.mock-bar b{margin-left:.4rem;font-family:var(--nv-mono);font-size:.72rem;font-weight:500;color:var(--nv-text-3)}
.mock-bar .tag{margin-left:auto;font-family:var(--nv-mono);font-size:.63rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--nv-text-3);border:1px solid var(--nv-border);
  border-radius:2px;padding:.15rem .4rem;white-space:nowrap}
.mock-tabs{display:flex;overflow-x:auto;border-bottom:1px solid var(--nv-border);background:var(--nv-bg-2)}
.mock-tabs span{flex:0 0 auto;padding:.55rem .85rem;border-right:1px solid var(--nv-border);
  font-family:var(--nv-mono);font-size:.7rem;color:var(--nv-text-3)}
.mock-tabs span.on{background:var(--nv-surface);color:var(--nv-accent);box-shadow:inset 0 -2px 0 var(--nv-accent)}
.mock-body{padding:.9rem}
.mock-kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:1px;
  background:var(--nv-border);border:1px solid var(--nv-border);border-radius:2px;overflow:hidden}
.mock-kpi{background:var(--nv-surface);padding:.7rem .8rem}
.mock-kpi b{display:block;font-family:var(--nv-mono);font-size:1rem;font-weight:600;color:var(--nv-text);line-height:1.2}
.mock-kpi span{display:block;margin-top:.25rem;font-family:var(--nv-mono);font-size:.62rem;
  letter-spacing:.1em;text-transform:uppercase;color:var(--nv-text-3)}
.mock-tbl{width:100%;border-collapse:collapse;font-family:var(--nv-mono);font-size:.71rem}
.mock-tbl th{text-align:left;padding:.45rem .5rem;border-bottom:1px solid var(--nv-border);
  font-weight:500;font-size:.63rem;letter-spacing:.1em;text-transform:uppercase;color:var(--nv-text-3);white-space:nowrap}
.mock-tbl td{padding:.45rem .5rem;border-bottom:1px solid var(--nv-border);color:var(--nv-text-2);white-space:nowrap}
.mock-tbl tr:last-child td{border-bottom:0}
.mock-tbl .up{color:var(--nv-ok)}
.mock-tbl .id{color:var(--nv-text)}
.mock-scroll{overflow-x:auto}
/* column chart drawn from hairline bars — shape only, no implied units */
.spark{display:flex;align-items:flex-end;gap:3px;height:56px}
.spark i{flex:1;min-width:3px;background:var(--nv-accent-muted);border-top:2px solid var(--nv-accent)}
.spark.mut i{background:var(--nv-surface-3);border-top-color:var(--nv-border-strong)}
.gauge{display:grid;gap:.55rem}
.gauge > div{display:grid;grid-template-columns:1fr auto;gap:.25rem .75rem;align-items:baseline}
.gauge .k{font-family:var(--nv-mono);font-size:.7rem;color:var(--nv-text-2)}
.gauge .v{font-family:var(--nv-mono);font-size:.7rem;color:var(--nv-text-3)}
.gauge .t{grid-column:1/-1;height:4px;background:var(--nv-surface-3);border-radius:2px;overflow:hidden}
.gauge .t i{display:block;height:100%;background:var(--nv-accent)}
.gauge .t i.warn{background:var(--nv-warn)}

/* ---- 12.8 interactive lifecycle flow ----------------------------------- */
.flow{display:grid;grid-template-columns:minmax(240px,320px) minmax(0,1fr);gap:1px;
  background:var(--nv-border);border:1px solid var(--nv-border);border-radius:var(--nv-r);overflow:hidden}
@media (max-width:767.98px){.flow{grid-template-columns:1fr}}
.flow-rail{background:var(--nv-bg-2);display:flex;flex-direction:column}
.flow-step{position:relative;display:grid;grid-template-columns:1.9rem 1fr;align-items:center;gap:.6rem;
  width:100%;text-align:left;border:0;border-bottom:1px solid var(--nv-border);
  background:transparent;padding:.85rem 1.05rem;cursor:pointer}
.flow-step:last-child{border-bottom:0}
.flow-step .n{font-family:var(--nv-mono);font-size:.7rem;color:var(--nv-text-3)}
.flow-step .t{font-size:.9rem;font-weight:600;color:var(--nv-text-2)}
.flow-step:hover{background:var(--nv-surface-2)}
.flow-step[aria-selected="true"]{background:var(--nv-surface);box-shadow:inset 2px 0 0 var(--nv-accent)}
.flow-step[aria-selected="true"] .n,.flow-step[aria-selected="true"] .t{color:var(--nv-accent)}
.flow-detail{background:var(--nv-surface);padding:clamp(1.4rem,3vw,2.25rem);display:none}
.flow-detail[data-on]{display:block}

/* ---- 12.9 capability matrix -------------------------------------------- */
.matrix{width:100%;border-collapse:collapse}
.matrix th,.matrix td{border:1px solid var(--nv-border);padding:.7rem .75rem;
  font-size:.82rem;vertical-align:middle;text-align:left}
.matrix thead th{background:var(--nv-bg-2);font-family:var(--nv-mono);font-weight:500;
  font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--nv-text-3);
  text-align:center;white-space:nowrap}
.matrix thead th:first-child{text-align:left}
.matrix tbody th{background:var(--nv-bg-2);font-family:var(--nv-mono);font-weight:600;
  font-size:.78rem;color:var(--nv-text);white-space:nowrap}
.matrix tbody th small{display:block;font-family:var(--bs-body-font-family);font-weight:400;
  font-size:.72rem;color:var(--nv-text-3);letter-spacing:0;margin-top:.15rem}
.matrix td{text-align:center;color:var(--nv-text-2)}
.matrix tbody tr:hover th,.matrix tbody tr:hover td{background:var(--nv-surface-2)}
.mx{display:inline-block;width:9px;height:9px;border-radius:50%;border:1px solid currentColor}
.mx.full{background:currentColor;color:var(--nv-accent)}
.mx.part{color:var(--nv-text-3)}
.mx-none{display:inline-block;width:10px;height:0;border-top:1px solid var(--nv-border-strong);vertical-align:middle}
.mx-legend{display:flex;flex-wrap:wrap;gap:1.25rem;margin-top:1rem;
  font-family:var(--nv-mono);font-size:.71rem;color:var(--nv-text-3)}
.mx-legend span{display:inline-flex;align-items:center;gap:.45rem}

/* ---- 12.10 comparison -------------------------------------------------- */
.vs{width:100%;border-collapse:collapse}
.vs th,.vs td{border:1px solid var(--nv-border);padding:.85rem .9rem;font-size:.86rem;
  vertical-align:top;text-align:left;line-height:1.55}
.vs thead th{background:var(--nv-bg-2);font-family:var(--nv-mono);font-weight:600;font-size:.72rem;
  letter-spacing:.08em;text-transform:uppercase;color:var(--nv-text-3)}
.vs thead th.now{color:var(--nv-accent);background:var(--nv-accent-muted);border-color:var(--nv-accent-line)}
.vs tbody th{font-weight:600;font-size:.83rem;color:var(--nv-text);width:19%;background:var(--nv-bg-2)}
.vs td{color:var(--nv-text-2);width:40.5%}
.vs td.now{background:var(--nv-accent-muted);border-color:var(--nv-accent-line);color:var(--nv-text)}
@media (max-width:767.98px){.vs,.vs tbody,.vs tr,.vs th,.vs td{display:block;width:auto}
  .vs thead{display:none}
  .vs tr{border:1px solid var(--nv-border);margin-bottom:.75rem}
  .vs th,.vs td{border:0;border-bottom:1px solid var(--nv-border)}
  .vs td::before{content:attr(data-h);display:block;font-family:var(--nv-mono);font-size:.64rem;
    letter-spacing:.1em;text-transform:uppercase;color:var(--nv-text-3);margin-bottom:.3rem}}

/* ---- 12.11 platform plates --------------------------------------------- */
.os-plate{display:flex;flex-direction:column;height:100%;overflow:hidden;
  border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r)}
.os-plate-logo{display:flex;align-items:center;justify-content:center;height:158px;padding:1.5rem;
  border-bottom:1px solid var(--nv-border);background:var(--nv-bg-2)}
.os-plate-logo img{max-height:78px;max-width:78%;width:auto;height:auto;object-fit:contain}
.os-plate-logo .fallback{display:none;text-align:center;font-family:var(--nv-mono);font-size:.72rem;
  line-height:1.7;letter-spacing:.06em;color:var(--nv-text-3)}
.os-plate-logo .fallback b{display:block;font-size:1.05rem;letter-spacing:-.02em;color:var(--nv-text-2)}
.os-plate-b{padding:1.4rem;flex:1 1 auto;display:flex;flex-direction:column}
.os-plate-b h3{font-size:1.15rem;margin:0 0 .2rem}
.os-plate-b .ver{font-family:var(--nv-mono);font-size:.76rem;color:var(--nv-text-3)}
.os-plate-b p{margin:.9rem 0 0;font-size:.88rem;line-height:1.6;color:var(--nv-text-2)}
.os-plate-meta{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:wrap;
  padding:.75rem 1.4rem;border-top:1px solid var(--nv-border);background:var(--nv-bg-2);
  font-family:var(--nv-mono);font-size:.71rem;color:var(--nv-text-3)}

/* ---- 12.12 stat plate --------------------------------------------------- */
.stat-xl{display:flex;flex-direction:column;height:100%;padding:1.6rem;
  border:1px solid var(--nv-border);background:var(--nv-surface);border-radius:var(--nv-r)}
.stat-xl .lbl{font-family:var(--nv-mono);font-size:.66rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--nv-text-3);margin-bottom:.9rem}
.stat-xl .note{margin:.85rem 0 0;font-size:.83rem;line-height:1.6;color:var(--nv-text-2)}
.stat-xl .foot{margin-top:auto;padding-top:1.1rem}

/* ---- 12.13 split / asymmetric layout helpers ---------------------------- */
/* All three variants are standalone — each sets display:grid itself. An
   earlier version only put display:grid on .split, which silently turned
   every .split-7 / .split-5 on the site into a stack of block elements. */
.split,.split-7,.split-5{display:grid;gap:clamp(1.75rem,4vw,3.5rem);align-items:start}
.split  {grid-template-columns:minmax(0,1fr)    minmax(0,1fr)}
.split-7{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}
.split-5{grid-template-columns:minmax(0,1fr)    minmax(0,1.35fr)}
@media (max-width:991.98px){.split,.split-7,.split-5{grid-template-columns:1fr;gap:2rem}}
.sticky-col{position:sticky;top:5rem}
@media (max-width:991.98px){.sticky-col{position:static}}

/* numbered editorial list, used beside diagrams */
.rail-list{list-style:none;margin:0;padding:0}
.rail-list li{display:grid;grid-template-columns:2.1rem 1fr;gap:.85rem;padding:1rem 0;
  border-top:1px solid var(--nv-border)}
.rail-list li:first-child{border-top:0;padding-top:0}
.rail-list .n{font-family:var(--nv-mono);font-size:.72rem;color:var(--nv-accent);padding-top:.15rem}
.rail-list h3{font-size:.95rem;margin:0 0 .3rem}
.rail-list p{margin:0;font-size:.86rem;line-height:1.6;color:var(--nv-text-2)}