/* OpTier -- enterprise sheet. Wide measure, midnight bands, violet accent. */
:root{
  --mid:#101833; --mid-2:#1A2447; --mid-3:#26305A;
  --vio:#7A5CFF; --vio-ink:#5B3FD9; --vio-deep:#4A32B8; --vio-lite:#A38CFF;
  --ink:#101833; --muted:#414D6B; --muted-dark:#C6CDE4; --on-dark:#E8ECF8;
  --paper:#FFFFFF; --mist:#F2F4FA; --line:#D7DCEC; --line-dark:#2C3763;
  --ok:#0B6B45; --over:#B3261E;
  --wrap:min(1620px,93vw);
  --disp:'Manrope','Segoe UI',Arial,sans-serif;
  --body:'Bitter',Georgia,'Times New Roman',serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 18px/1.7 var(--body);
  overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--vio-ink)}
a:hover{color:var(--vio-deep)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,
textarea:focus-visible,summary:focus-visible{outline:3px solid var(--vio);outline-offset:2px}
.op-wrap{width:var(--wrap);margin-inline:auto}
.op-skip{position:absolute;left:-9999px}
.op-skip:focus{left:10px;top:10px;z-index:60;background:var(--mid);color:#fff;padding:10px 18px;
  font-family:var(--disp)}

/* ---- top bands ---- */
.op-util{background:var(--mid-2);color:var(--muted-dark);font-family:var(--disp);font-weight:500;
  font-size:13.5px;letter-spacing:.01em}
.op-util-in{display:flex;justify-content:space-between;gap:20px;padding:10px 0}
.op-head{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.op-head-in{display:flex;align-items:center;gap:26px;padding:15px 0;flex-wrap:wrap}
.op-logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.op-mark{width:34px;height:34px;flex:0 0 34px;border-radius:7px}
.op-logo-t{font-family:var(--disp);font-weight:500;font-size:27px;letter-spacing:-.02em}
.op-logo-t b{font-weight:800}
.op-nav{margin-left:auto;display:flex;gap:30px;flex-wrap:wrap;align-items:center}
.op-nav a{font-family:var(--disp);font-weight:600;font-size:15.5px;color:var(--muted);
  text-decoration:none;padding:8px 0;border-bottom:2px solid transparent}
.op-nav a:hover{color:var(--vio-ink);border-bottom-color:var(--line)}
.op-nav a.on{color:var(--vio-ink);border-bottom-color:var(--vio)}
.op-burger{display:none;margin-left:auto;font-family:var(--disp);font-weight:600;font-size:15px;
  background:var(--mid);color:#fff;border:0;padding:11px 20px;border-radius:4px;cursor:pointer}

/* ---- type ---- */
h1,h2,h3,h4{font-family:var(--disp);font-weight:800;letter-spacing:-.022em;line-height:1.1;
  margin:0 0 .55em}
h1{font-size:clamp(35px,4.2vw,60px)}
h2{font-size:clamp(27px,2.5vw,40px)}
h3{font-size:clamp(20px,1.5vw,24px);font-weight:600;letter-spacing:-.012em}
h4{font-size:19px;font-weight:600;letter-spacing:-.01em}
p{margin:0 0 1.15em;max-width:76ch}
.op-lede{font-size:clamp(19px,1.35vw,22px);line-height:1.6;max-width:64ch}
.op-kicker{font-family:var(--disp);font-weight:600;font-size:13.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--vio-ink);margin:0 0 16px}
.op-rule{height:3px;width:72px;background:var(--vio);border:0;margin:0 0 28px}
.op-small{font-size:16px;color:var(--muted)}

/* ---- bands ---- */
.op-band{padding:74px 0}
.op-band.mist{background:var(--mist);border-top:1px solid var(--line);
  border-bottom:1px solid var(--line)}
.op-band.dark{background:var(--mid);color:var(--on-dark)}
.op-band.dark h1,.op-band.dark h2,.op-band.dark h3,.op-band.dark h4{color:#fff}
.op-band.dark p{color:var(--muted-dark)}
.op-band.dark .op-kicker{color:var(--vio-lite)}
.op-band.dark a{color:var(--vio-lite)}
.op-band.dark .op-small{color:var(--muted-dark)}
.op-band.tight{padding:52px 0}

/* ---- hero ---- */
.op-hero{background:var(--mid);color:var(--on-dark);padding:78px 0 84px;
  border-bottom:4px solid var(--vio)}
.op-hero h1{color:#fff;max-width:17ch}
.op-hero p{color:var(--muted-dark)}
.op-hero .op-kicker{color:var(--vio-lite)}
.op-hero-grid{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);gap:64px;
  align-items:start}
.op-panel{background:var(--mid-2);border:1px solid var(--line-dark);border-top:4px solid var(--vio);
  padding:30px 30px 12px}
.op-panel h2{font-size:20px;font-weight:600;letter-spacing:0;margin-bottom:20px}
.op-qlist{list-style:none;margin:0;padding:0;counter-reset:q}
.op-qlist li{counter-increment:q;padding:0 0 20px 46px;position:relative;color:var(--muted-dark);
  font-size:17px;line-height:1.6}
.op-qlist li::before{content:counter(q,decimal-leading-zero);position:absolute;left:0;top:1px;
  font-family:var(--disp);font-weight:800;font-size:15px;color:var(--vio-lite);
  border:1px solid var(--mid-3);border-radius:4px;padding:3px 7px}
.op-actions{display:flex;gap:16px;flex-wrap:wrap;margin-top:34px}
.op-btn{display:inline-block;font-family:var(--disp);font-weight:600;font-size:17px;
  padding:15px 30px;border-radius:5px;text-decoration:none;border:2px solid var(--vio-ink);
  background:var(--vio-ink);color:#fff}
.op-btn:hover{background:var(--vio-deep);border-color:var(--vio-deep);color:#fff}
.op-btn.ghost{background:transparent;color:#fff;border-color:#6B77A5}
.op-btn.ghost:hover{background:#fff;color:var(--mid);border-color:#fff}
.op-btn.ghost.on-light{background:transparent;color:var(--ink);border-color:var(--ink)}
.op-btn.ghost.on-light:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
/* the dark-band link colour must not repaint a button label */
.op-band.dark a.op-btn,.op-hero a.op-btn{color:#fff}
.op-band.dark a.op-btn:hover,.op-hero a.op-btn:hover{color:#fff}
.op-band.dark a.op-btn.ghost:hover,.op-hero a.op-btn.ghost:hover{color:var(--mid)}

/* ---- hop flow ---- */
.op-flow-scroll{overflow-x:auto;padding-bottom:8px}
.op-flow{display:flex;align-items:stretch;min-width:1080px}
.op-node{flex:1 1 0;min-width:0;background:var(--paper);border:1px solid var(--line);
  border-top:4px solid var(--vio);padding:20px 18px 22px}
.op-node-n{font-family:var(--disp);font-weight:800;font-size:13px;letter-spacing:.14em;
  color:var(--vio-ink);display:block;margin-bottom:8px}
.op-node h3{font-size:19px;margin-bottom:8px}
.op-node p{font-size:15.5px;line-height:1.55;color:var(--muted);margin:0;max-width:none}
.op-arrow{flex:0 0 36px;position:relative}
.op-arrow::before{content:"";position:absolute;top:50%;left:0;right:9px;height:2px;
  background:#B9C2DC}
.op-arrow::after{content:"";position:absolute;top:50%;right:3px;transform:translateY(-50%);
  width:0;height:0;border-left:9px solid #B9C2DC;border-top:6px solid transparent;
  border-bottom:6px solid transparent}
.op-flow-ends{display:flex;justify-content:space-between;gap:16px;margin-top:14px;
  font-family:var(--disp);font-weight:600;font-size:14px;color:var(--muted)}

/* ---- grids and cards ---- */
.op-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px}
.op-cols.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.op-cols.four{grid-template-columns:repeat(4,minmax(0,1fr));gap:26px}
.op-split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:56px;
  align-items:center}
.op-split.rev{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}
.op-split.top{align-items:start}
.op-card{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--vio);
  padding:26px 26px 8px}
.op-band.dark .op-card{background:var(--mid-2);border-color:var(--line-dark)}
.op-card h3{margin-bottom:10px}
.op-card p{font-size:16.5px;max-width:none}
.op-fig{margin:0}
.op-fig img{width:100%;border:1px solid var(--line)}
.op-band.dark .op-fig img{border-color:var(--line-dark)}
.op-fig figcaption{font-size:15px;color:var(--muted);padding-top:12px;line-height:1.5}
.op-band.dark .op-fig figcaption{color:var(--muted-dark)}
.op-figrow{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:34px;margin:38px 0}
.op-strip img{width:100%;height:clamp(190px,26vw,340px);object-fit:cover;display:block}

/* ---- lists ---- */
.op-marks{list-style:none;margin:0;padding:0}
.op-marks li{position:relative;padding:14px 0 14px 32px;border-bottom:1px solid var(--line);
  max-width:80ch}
.op-marks li::before{content:"";position:absolute;left:0;top:23px;width:12px;height:12px;
  border-radius:3px;background:var(--vio)}
.op-band.dark .op-marks li{border-bottom-color:var(--line-dark)}
.op-defs{margin:0}
.op-defs dt{font-family:var(--disp);font-weight:600;font-size:18px;margin-top:22px}
.op-defs dt:first-child{margin-top:0}
.op-defs dd{margin:6px 0 0;color:var(--muted);max-width:76ch}
.op-band.dark .op-defs dd{color:var(--muted-dark)}

/* ---- accordion ---- */
.op-acc{border-top:2px solid var(--ink);margin-top:8px}
.op-acc details{border-bottom:1px solid var(--line)}
.op-acc summary{cursor:pointer;list-style:none;position:relative;padding:22px 52px 22px 0;
  font-family:var(--disp);font-weight:600;font-size:19.5px;letter-spacing:-.01em}
.op-acc summary::-webkit-details-marker{display:none}
.op-acc summary::after{content:"";position:absolute;right:12px;top:calc(50% - 1px);width:18px;
  height:2px;background:var(--vio-ink)}
.op-acc summary:hover{color:var(--vio-ink)}
.op-acc-mark{position:absolute;right:20px;top:calc(50% - 9px);width:2px;height:18px;
  background:var(--vio-ink)}
.op-acc details[open] .op-acc-mark{display:none}
.op-acc .op-acc-body{padding:0 0 20px;max-width:88ch}
.op-acc .op-acc-body p:last-child{margin-bottom:0}

/* ---- tables ---- */
.op-tablewrap{overflow-x:auto;margin:26px 0}
table.op-table{border-collapse:collapse;width:100%;min-width:560px;font-size:16.5px}
table.op-table caption{text-align:left;font-family:var(--disp);font-weight:600;font-size:14px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding-bottom:12px}
table.op-table th,table.op-table td{text-align:left;padding:14px 16px;
  border-bottom:1px solid var(--line);vertical-align:top}
table.op-table thead th{background:var(--mid);color:#fff;font-family:var(--disp);font-weight:600;
  font-size:15px;letter-spacing:.02em;border-bottom:0}
table.op-table tbody tr:nth-child(even){background:var(--mist)}

/* ---- allocator ---- */
.op-alloc{border:1px solid var(--line);background:var(--paper);border-top:4px solid var(--vio)}
.op-alloc-head{padding:24px 28px 6px;border-bottom:1px solid var(--line)}
.op-alloc-head h3{margin-bottom:10px}
.op-alloc-head p{font-size:16.5px;color:var(--muted)}
.op-alloc-body{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr)}
.op-alloc-in{padding:26px 28px 30px;border-right:1px solid var(--line)}
.op-target{display:flex;align-items:flex-end;gap:18px;flex-wrap:wrap;padding-bottom:22px;
  border-bottom:1px solid var(--line);margin-bottom:8px}
.op-target label{display:block;font-family:var(--disp);font-weight:600;font-size:15px;
  margin-bottom:7px}
.op-target input{width:190px}
.op-target .op-hint{font-size:15px;color:var(--muted);max-width:44ch;margin:0}
input[type=number].op-num{font:400 17px var(--body);padding:11px 13px;border:1px solid #A9B3CE;
  border-radius:4px;background:#fff;color:var(--ink);width:120px}
input[type=number].op-num:focus{border-color:var(--vio-ink)}
table.op-alloc-t{border-collapse:collapse;width:100%;min-width:520px;font-size:16.5px}
table.op-alloc-t caption{text-align:left;font-family:var(--disp);font-weight:600;font-size:13.5px;
  letter-spacing:.11em;text-transform:uppercase;color:var(--muted);padding:4px 0 12px}
table.op-alloc-t th,table.op-alloc-t td{padding:11px 12px;border-bottom:1px solid var(--line);
  text-align:left;vertical-align:middle}
table.op-alloc-t thead th{font-family:var(--disp);font-weight:600;font-size:14px;
  letter-spacing:.06em;text-transform:uppercase;color:var(--muted);border-bottom:2px solid var(--ink)}
table.op-alloc-t tbody th{font-family:var(--disp);font-weight:600;font-size:17px}
.op-share{font-family:var(--disp);font-weight:600;font-size:16px;display:block;margin-bottom:6px}
.op-bar{display:block;height:9px;background:#E3E7F3;border-radius:5px;overflow:hidden}
.op-bar span{display:block;height:100%;width:0;background:var(--vio-ink);border-radius:5px}
.op-alloc-out{padding:26px 28px 30px;background:var(--mist)}
.op-alloc-out dt{font-family:var(--disp);font-weight:600;font-size:13.5px;letter-spacing:.11em;
  text-transform:uppercase;color:var(--muted);margin-top:24px}
.op-alloc-out dt:first-child{margin-top:0}
.op-alloc-out dd{margin:4px 0 0;font-family:var(--disp);font-weight:800;font-size:31px;
  line-height:1.15;letter-spacing:-.02em;color:var(--ink)}
.op-alloc-out dd .op-sub{display:block;font-family:var(--body);font-weight:400;font-size:15.5px;
  letter-spacing:0;color:var(--muted);margin-top:5px;line-height:1.5}
.op-val-under{color:var(--ok)}
.op-val-over{color:var(--over)}
.op-val-exact{color:var(--vio-ink)}
.op-note{font-size:16px;color:var(--muted);border-left:3px solid var(--vio);padding:6px 0 6px 18px;
  margin:26px 0 0;max-width:78ch}
.op-band.dark .op-note{color:var(--muted-dark);border-left-color:var(--vio-lite)}

/* ---- form ---- */
.op-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.op-form .full{grid-column:1/-1}
.op-form label{display:block;font-family:var(--disp);font-weight:600;font-size:15px;
  margin-bottom:7px}
.op-form input,.op-form select,.op-form textarea{width:100%;font:400 17px var(--body);
  padding:12px 14px;border:1px solid #A9B3CE;border-radius:4px;background:#fff;color:var(--ink)}
.op-form textarea{min-height:172px;resize:vertical}
.op-form input:focus,.op-form select:focus,.op-form textarea:focus{border-color:var(--vio-ink)}
.op-req{color:var(--over)}
.op-honey{position:absolute;left:-9999px}
button.op-submit{font-family:var(--disp);font-weight:600;font-size:18px;padding:16px 38px;
  border-radius:5px;border:2px solid var(--vio-ink);background:var(--vio-ink);color:#fff;
  cursor:pointer}
button.op-submit:hover{background:var(--vio-deep);border-color:var(--vio-deep)}

/* a 34-inch monitor should not get a narrow column in the middle of the screen */
@media (min-width:2100px){
  :root{--wrap:min(2100px,90vw)}
  body{font-size:19px}
  h1{font-size:70px}
  h2{font-size:46px}
  .op-lede{font-size:24px;max-width:70ch}
  .op-hero{padding:96px 0 104px}
  .op-hero h1{max-width:15ch}
  .op-hero-grid{gap:90px}
  .op-band{padding:92px 0}
  .op-panel{padding:38px 38px 18px}
  .op-qlist li{font-size:19px}
}
@media (min-width:2800px){:root{--wrap:min(2520px,88vw)}}

/* ---- document layout: sticky contents rail beside long-form prose ---- */
.op-wrap.doc{width:min(1380px,93vw)}
@media (min-width:2100px){.op-wrap.doc{width:min(1680px,90vw)}
  .op-doc{grid-template-columns:290px minmax(0,1fr);gap:80px}}
.op-doc{display:grid;grid-template-columns:250px minmax(0,1fr);gap:64px;align-items:start}
.op-toc{position:sticky;top:96px;border-left:3px solid var(--vio);padding-left:22px}
.op-toc h2{font-family:var(--disp);font-weight:600;font-size:13px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.op-toc a{display:block;font-family:var(--disp);font-weight:600;font-size:15.5px;line-height:1.35;
  padding:11px 0;color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line)}
.op-toc a:hover{color:var(--vio-ink)}
.op-toc a:last-child{border-bottom:0}
.op-doc-body p{max-width:88ch}
.op-doc-body .op-marks li{max-width:88ch}

/* ---- misc ---- */
.op-band[id],h2[id],h3[id]{scroll-margin-top:96px}
.op-crumbs{font-size:15px;color:var(--muted);margin:0 0 18px}
.op-crumbs a{color:var(--muted)}
.op-prose h2{margin-top:1.6em}
.op-prose h3{margin-top:1.5em}
.op-prose h2:first-child,.op-prose h3:first-child{margin-top:0}
.op-legal{max-width:84ch}
.op-legal h2{margin-top:1.7em}
.op-legal li{margin-bottom:.5em}
.op-credits{list-style:none;padding:0;margin:0;font-size:16px}
.op-credits li{padding:12px 0;border-bottom:1px solid var(--line)}
.op-center{text-align:center}
.op-center p{margin-inline:auto}
.op-center .op-actions{justify-content:center}

/* ---- footer ---- */
.op-foot{background:var(--mid);color:var(--muted-dark);padding:60px 0 30px;font-size:16.5px}
.op-foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:44px}
.op-foot-brand{font-family:var(--disp);font-weight:500;font-size:27px;color:#fff;margin:0 0 14px;
  letter-spacing:-.02em}
.op-foot-brand b{font-weight:800;color:var(--vio-lite)}
.op-foot-p{font-size:16px;color:var(--muted-dark);max-width:46ch}
.op-foot-h{font-family:var(--disp);font-weight:600;font-size:14px;letter-spacing:.12em;
  text-transform:uppercase;color:#fff;margin:0 0 14px}
.op-foot-list{list-style:none;padding:0;margin:0}
.op-foot-list li{margin-bottom:10px;font-size:16px}
.op-foot a{color:var(--vio-lite)}
.op-foot-end{border-top:1px solid var(--line-dark);padding-top:20px;margin:34px 0 0;font-size:15px;
  color:var(--muted-dark)}

@media (max-width:1080px){
  .op-hero-grid,.op-split,.op-split.rev,.op-cols,.op-cols.two,.op-figrow,.op-alloc-body,
  .op-doc,.op-foot-grid{grid-template-columns:minmax(0,1fr)}
  .op-toc{position:static;padding-left:18px}
  .op-doc{gap:38px}
  .op-cols.four{grid-template-columns:repeat(2,minmax(0,1fr))}
  .op-foot-grid{gap:34px}
  .op-alloc-in{border-right:0;border-bottom:1px solid var(--line)}
}
@media (max-width:900px){
  .op-burger{display:block}
  .op-nav{display:none;width:100%;flex-direction:column;gap:0;margin-left:0;order:3}
  .op-nav.open{display:flex}
  .op-nav a{padding:14px 0;border-bottom:1px solid var(--line);width:100%}
  .op-util-in{flex-direction:column;gap:3px}
  .op-util-r{display:none}
  .op-flow{min-width:0;flex-direction:column}
  .op-flow-scroll{overflow-x:visible}
  .op-arrow{flex:0 0 30px;height:30px}
  .op-arrow::before{top:0;bottom:9px;left:50%;right:auto;width:2px;height:auto}
  .op-arrow::after{top:auto;bottom:2px;right:auto;left:50%;transform:translateX(-50%);
    border-left:6px solid transparent;border-right:6px solid transparent;
    border-top:9px solid #B9C2DC;border-bottom:0}
  .op-flow-ends{flex-direction:column;gap:4px}
  .op-band{padding:56px 0}
  .op-hero{padding:56px 0 60px}
  .op-form{grid-template-columns:minmax(0,1fr)}
  .op-cols.four{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:420px){
  body{font-size:17.5px}
  .op-alloc-in,.op-alloc-out,.op-alloc-head{padding-left:18px;padding-right:18px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}