/* Gusset Group — visual system. Seed dd2d2211. */

:root{
  --bg:oklch(1 0 0);
  --surface:oklch(0.975 0.004 230);
  --surface-2:oklch(0.955 0.006 230);
  --ink:oklch(0.20 0.018 230);
  --muted:oklch(0.49 0.014 230);
  --line:oklch(0.905 0.008 230);
  --line-strong:oklch(0.78 0.012 230);
  --primary:oklch(0.42 0.115 230);
  --primary-deep:oklch(0.27 0.075 230);
  --primary-lift:oklch(0.50 0.12 230);
  --on-primary:oklch(0.985 0.004 230);
  --on-primary-muted:oklch(0.855 0.028 230);
  --on-primary-line:oklch(0.475 0.05 230);
  --flag:oklch(0.72 0.155 62);
  --flag-on-dark:oklch(0.825 0.135 62);
  --flag-deep:oklch(0.46 0.11 62);
  --flag-wash:oklch(0.965 0.03 62);

  --ease:cubic-bezier(0.22,1,0.36,1);
  --gut:clamp(1.15rem,4.5vw,4.25rem);
  --measure:66ch;

  --z-sticky:100;
  --z-overlay:200;

  --sans:"Archivo","Archivo Fallback",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"Azeret Mono","SF Mono",ui-monospace,Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:clamp(1rem,0.97rem + 0.16vw,1.075rem);
  line-height:1.6;
  font-synthesis-weight:none;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* --- browser surfaces, themed --- */
::selection{background:oklch(0.42 0.115 230 / 0.16);color:var(--ink)}
:root{accent-color:var(--primary);caret-color:var(--primary)}
:where(a,button,input,select,summary,[tabindex]):focus-visible{
  outline:2px solid var(--primary);
  outline-offset:3px;
  border-radius:1px;
}
.band-dark :where(a,button,input,select,summary):focus-visible{outline-color:var(--flag-on-dark)}
@supports (scrollbar-color:auto){
  html{scrollbar-color:var(--line-strong) transparent;scrollbar-width:thin}
}
a{color:var(--primary);text-decoration-thickness:1px;text-underline-offset:0.18em}
a:hover{text-decoration-thickness:2px}

h1,h2,h3{text-wrap:balance;margin:0}
p{text-wrap:pretty;margin:0}

.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-0.02em}

/* --- structure --- */
section[id]{scroll-margin-top:5.25rem}
.shell{max-width:80rem;margin-inline:auto;padding-inline:var(--gut)}
.rule{border:0;border-top:1px solid var(--line);margin:0}
.rule--strong{border-top-color:var(--line-strong)}

.display{
  font-family:var(--sans);
  font-weight:600;
  font-stretch:112%;
  letter-spacing:-0.035em;
  line-height:0.98;
  font-size:clamp(2.35rem,1.5rem + 2.9vw,4.15rem);
}
.h2{
  font-weight:600;
  font-stretch:108%;
  letter-spacing:-0.026em;
  line-height:1.06;
  font-size:clamp(1.85rem,1.25rem + 2.1vw,3.05rem);
}
.h3{
  font-weight:600;
  font-stretch:104%;
  letter-spacing:-0.014em;
  line-height:1.2;
  font-size:clamp(1.12rem,1.03rem + 0.4vw,1.35rem);
}
.lead{
  font-size:clamp(1.1rem,1.02rem + 0.45vw,1.35rem);
  line-height:1.48;
  color:var(--ink);
  max-width:34ch;
}
.body{color:var(--muted);max-width:var(--measure)}
.body + .body{margin-top:0.85rem}
.body strong{color:var(--ink);font-weight:600}

/* --- masthead --- */
.masthead{
  position:sticky;top:0;z-index:var(--z-sticky);
  background:oklch(1 0 0 / 0.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.masthead .shell{
  display:flex;align-items:center;justify-content:space-between;
  gap:1.5rem;min-height:4.15rem;
}
.mark{display:flex;align-items:center;gap:0.62rem;text-decoration:none;color:var(--ink)}
.mark svg{display:block;flex:none}
.mark b{
  font-weight:600;font-stretch:118%;letter-spacing:0.01em;
  font-size:1.02rem;
}
.mark span{color:var(--muted);font-weight:500}
.mark .tm{
  font-size:0.46em;
  font-weight:500;
  font-stretch:100%;
  letter-spacing:0;
  color:var(--muted);
  vertical-align:top;
  line-height:1;
  margin-left:0.14em;
}
.masthead nav{display:flex;gap:1.7rem;align-items:center}
.masthead nav a{
  font-size:0.875rem;font-weight:500;color:var(--muted);
  text-decoration:none;
}
.masthead nav a:hover{color:var(--ink)}
.masthead nav a.btn{color:var(--btn-fg)}
.masthead nav a.btn:hover{color:var(--btn-fg)}
@media (max-width:720px){.masthead nav a:not(.btn){display:none}}

/* --- buttons --- */
.btn{
  --btn-bg:var(--primary);
  --btn-fg:var(--on-primary);
  display:inline-flex;align-items:center;gap:0.55rem;
  background:var(--btn-bg);color:var(--btn-fg);
  border:1px solid var(--btn-bg);
  font:inherit;font-size:0.94rem;font-weight:500;
  padding:0.68rem 1.15rem;
  text-decoration:none;cursor:pointer;
  transition:background 180ms var(--ease),border-color 180ms var(--ease),transform 180ms var(--ease);
}
.btn:hover{--btn-bg:var(--primary-deep);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--ghost{
  --btn-bg:transparent;--btn-fg:var(--ink);
  border-color:var(--line-strong);
}
.btn--ghost:hover{--btn-bg:var(--surface);--btn-fg:var(--ink);border-color:var(--ink)}
.btn--onDark{--btn-bg:var(--on-primary);--btn-fg:var(--primary-deep);border-color:var(--on-primary)}
.btn--onDark:hover{--btn-bg:oklch(0.90 0.02 230);border-color:oklch(0.90 0.02 230)}
.btn .arw{transition:transform 220ms var(--ease)}
.btn:hover .arw{transform:translateX(3px)}

/* --- hero --- */
.hero{padding-block:clamp(2.75rem,5vw,4.75rem) clamp(2.25rem,4vw,3.5rem)}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,0.92fr);
  gap:clamp(2rem,4vw,4rem);
  align-items:center;
}
@media (max-width:940px){.hero-grid{grid-template-columns:1fr}}
.hero .lead{margin-top:1.5rem}
.hero .body{margin-top:1.1rem;max-width:44ch}
.actions{display:flex;flex-wrap:wrap;gap:0.7rem;margin-top:2rem}

.disclaim{
  margin-top:1.6rem;padding-top:1.05rem;border-top:1px solid var(--line);
  font-size:0.9rem;color:var(--muted);max-width:42ch;
}
.disclaim b{color:var(--ink);font-weight:600}

/* --- figure --- */
.figure{margin:0}
.figure svg{width:100%;height:auto;display:block}
.figcap{
  margin-top:1rem;padding-top:0.8rem;border-top:1px solid var(--line);
  display:flex;gap:1.2rem;justify-content:space-between;align-items:baseline;
  font-size:0.845rem;color:var(--muted);
}
.figcap p{max-width:38ch}
.figcap .mono{font-size:0.72rem;letter-spacing:0.06em;color:var(--line-strong);flex:none}

/* --- generic band --- */
.band{padding-block:clamp(3.25rem,6vw,5.5rem);border-top:1px solid var(--line)}
.band-head{max-width:52ch}
.band-head .body{margin-top:1.05rem}
.band-dark{
  background:oklch(0.355 0.10 230);color:var(--on-primary);border-top:0;
}
.band-dark .body{color:var(--on-primary-muted)}
.band-dark .body strong{color:var(--on-primary)}
.band-deep{background:var(--primary-deep);color:var(--on-primary);border-top:0}
.band-deep .body{color:var(--on-primary-muted)}

/* --- scope schedule --- */
.schedule{width:100%;border-collapse:collapse;margin-top:2.25rem;text-align:left}
.schedule caption{
  caption-side:top;text-align:left;font-size:0.845rem;color:var(--muted);
  padding-bottom:0.9rem;
}
.schedule th,.schedule td{
  padding:1.15rem 1.25rem 1.15rem 0;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.schedule thead th{
  border-bottom:1px solid var(--line-strong);
  padding-bottom:0.6rem;
  font-family:var(--mono);font-size:0.7rem;font-weight:500;
  letter-spacing:0.09em;text-transform:uppercase;color:var(--muted);
}
.schedule tbody tr{transition:background 160ms var(--ease)}
.schedule tbody tr:hover{background:var(--surface)}
.schedule .c-mark{
  width:5.5rem;font-family:var(--mono);font-size:0.8rem;
  color:var(--primary);padding-left:0;
}
.schedule .c-scope{width:16rem;font-weight:600;font-stretch:104%;letter-spacing:-0.012em}
.schedule .c-scope a{color:var(--ink);text-decoration:none}
.schedule tbody tr:hover .c-scope a{color:var(--primary);text-decoration:underline;text-underline-offset:0.2em}
.schedule .c-runs{color:var(--muted);font-size:0.955rem}
.schedule td:last-child{padding-right:0}
@media (max-width:800px){
  .schedule,.schedule tbody,.schedule tr,.schedule td{display:block;width:auto}
  .schedule thead{display:none}
  .schedule tbody tr{
    padding:1.35rem 0;border-bottom:1px solid var(--line);
  }
  .schedule tbody tr:hover{background:transparent}
  .schedule td{border:0;padding:0}
  .schedule .c-mark{margin-bottom:0.3rem}
  .schedule .c-scope{margin-bottom:0.45rem}
}

/* --- instrument --- */
.inst{
  margin-top:2.5rem;
  display:grid;grid-template-columns:minmax(0,22rem) minmax(0,1fr);
  gap:clamp(1.5rem,3vw,3rem);
  align-items:start;
}
@media (max-width:860px){.inst{grid-template-columns:1fr}}

.field{display:block;margin-bottom:1.15rem}
.field > span{
  display:block;font-family:var(--mono);font-size:0.7rem;font-weight:500;
  letter-spacing:0.09em;text-transform:uppercase;
  color:var(--on-primary-muted);margin-bottom:0.42rem;
}
.field input,.field select{
  width:100%;font:inherit;font-size:0.98rem;
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  color:var(--on-primary);
  background:oklch(0.285 0.072 230);
  border:1px solid var(--on-primary-line);
  padding:0.62rem 0.75rem;
  color-scheme:dark;
}
.field input:hover,.field select:hover{border-color:var(--on-primary-muted)}
.field select{
  appearance:none;background-image:none;cursor:pointer;
  font-family:var(--sans);font-size:0.95rem;padding-right:2.2rem;
  text-overflow:ellipsis;
}
.selwrap{position:relative}
.selwrap::after{
  content:"";position:absolute;right:0.85rem;top:50%;
  width:0.42rem;height:0.42rem;margin-top:-0.32rem;
  border-right:1.5px solid var(--on-primary-muted);
  border-bottom:1.5px solid var(--on-primary-muted);
  transform:rotate(45deg);pointer-events:none;
}

.out{border-top:1px solid var(--on-primary-line)}
.row{
  display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:0.4rem 1.5rem;align-items:baseline;
  padding:1.15rem 0;border-bottom:1px solid var(--on-primary-line);
}
.row-t{font-weight:600;font-stretch:104%;letter-spacing:-0.012em;font-size:1.02rem}
.row-s{
  grid-column:1;font-size:0.885rem;color:var(--on-primary-muted);
  max-width:52ch;margin-top:0.2rem;
}
.row-d{
  grid-column:2;grid-row:1;text-align:right;
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:1.02rem;letter-spacing:-0.02em;
}
.row-c{
  grid-column:2;grid-row:2;text-align:right;
  font-family:var(--mono);font-size:0.74rem;letter-spacing:0.03em;
  color:var(--on-primary-muted);margin-top:0.2rem;white-space:nowrap;
}
.row.is-flag .row-d{color:var(--flag-on-dark)}
.row.is-flag .row-c{color:var(--flag-on-dark)}
.row-c .dot{
  display:inline-block;width:0.42rem;height:0.42rem;
  background:currentColor;margin-right:0.4rem;vertical-align:0.02em;
}
.row[hidden]{display:none}

.note{
  margin-top:1.35rem;font-size:0.83rem;line-height:1.55;
  color:var(--on-primary-muted);max-width:62ch;
}
.note b{color:var(--on-primary);font-weight:600}

/* --- steps --- */
.steps{list-style:none;margin:2rem 0 0;padding:0;counter-reset:s;max-width:44rem}
.steps li{
  counter-increment:s;position:relative;
  padding:1.05rem 0 1.05rem 3.4rem;
  border-top:1px solid var(--line);
  color:var(--muted);
}
.steps li:last-child{border-bottom:1px solid var(--line)}
.steps li::before{
  content:counter(s,decimal-leading-zero);
  position:absolute;left:0;top:1.15rem;
  font-family:var(--mono);font-size:0.78rem;color:var(--primary);
}
.steps b{color:var(--ink);font-weight:600}

.stamp{
  margin-top:2rem;border:1px solid var(--line-strong);
  padding:1.3rem 1.45rem;max-width:44rem;background:var(--surface);
  display:flex;gap:1.1rem;align-items:flex-start;
}
.stamp svg{flex:none;margin-top:0.15rem}
.stamp p{font-size:1rem;color:var(--muted)}
.stamp strong{color:var(--ink);font-weight:600}

/* --- two-up --- */
.twoup{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(1.75rem,4vw,4rem);align-items:start;
}
@media (max-width:860px){.twoup{grid-template-columns:1fr}}

/* --- closing --- */
.close-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2.5rem;align-items:end}
@media (max-width:860px){.close-grid{grid-template-columns:1fr;align-items:start}}
.contact{
  display:flex;flex-direction:column;gap:0.55rem;
  font-family:var(--mono);font-size:0.85rem;
}
.contact span{color:var(--on-primary-muted)}
.contact a{
  color:var(--on-primary);
  text-decoration-color:var(--on-primary-line);
  text-underline-offset:0.22em;
}
.contact a:hover{text-decoration-color:var(--on-primary)}
.tbd{
  display:inline-block;color:var(--flag-on-dark);
  border:1px dashed currentColor;padding:0.05rem 0.42rem;
  font-size:0.75rem;letter-spacing:0.06em;
}

footer{padding-block:2.5rem 3.25rem;border-top:1px solid var(--line)}
footer .shell{
  display:flex;flex-wrap:wrap;gap:0.6rem 2rem;justify-content:space-between;
  font-size:0.85rem;color:var(--muted);
}
footer p{margin:0}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:0.2em}

/* --- motion --- */
@media (prefers-reduced-motion:no-preference){
  .fg-draw{stroke-dasharray:var(--len);stroke-dashoffset:var(--len);animation:draw 720ms var(--ease) forwards}
  .fg-fill{opacity:0;animation:fade 420ms var(--ease) forwards}
  .fg-plate{opacity:0;transform-box:fill-box;transform-origin:center;transform:scale(0.94);animation:plate 520ms var(--ease) 380ms forwards}
  .fg-bolt{opacity:0;animation:bolt 260ms var(--ease) forwards}
  .fg-flow{stroke-dasharray:9 15;animation:flow 2.6s linear 1000ms infinite}
  .fg-note{opacity:0;animation:fade 520ms var(--ease) 820ms forwards}
}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes plate{to{opacity:1;transform:none}}
@keyframes bolt{to{opacity:1}}
@keyframes fade{to{opacity:1}}
@keyframes flow{to{stroke-dashoffset:-48}}

/* ---------- interior pages ---------- */
.crumb{
  display:flex;flex-wrap:wrap;gap:0.55rem;align-items:baseline;
  font-family:var(--mono);font-size:0.72rem;letter-spacing:0.06em;
  color:var(--muted);padding-top:clamp(1.75rem,3.5vw,2.75rem);
}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--primary);text-decoration:underline}
.crumb span[aria-current]{color:var(--ink)}
.crumb .sep{color:var(--line-strong)}

.phero{padding-block:1.4rem clamp(2.5rem,5vw,4rem);border-bottom:1px solid var(--line)}
.phero h1{
  font-weight:600;font-stretch:110%;letter-spacing:-0.03em;line-height:1.02;
  font-size:clamp(2.1rem,1.4rem + 2.4vw,3.5rem);max-width:18ch;
}
.phero .mark-id{
  font-family:var(--mono);font-size:0.78rem;color:var(--primary);
  letter-spacing:0.06em;margin-bottom:0.9rem;
}
.phero .lead{margin-top:1.35rem;max-width:46ch}

.prose h2{
  font-weight:600;font-stretch:106%;letter-spacing:-0.018em;
  font-size:clamp(1.4rem,1.15rem + 0.9vw,1.85rem);
  margin:0 0 1rem;
}
.prose h3{margin-bottom:0.6rem}
.prose > * + h2{margin-top:2.75rem}
.prose p + p{margin-top:0.9rem}

/* spec list: ruled rows, not cards */
.spec{list-style:none;margin:1.35rem 0 0;padding:0;max-width:46rem}
.spec li{
  padding:0.95rem 0;border-bottom:1px solid var(--line);
  color:var(--muted);display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:0.9rem;align-items:baseline;
}
.spec li:first-child{border-top:1px solid var(--line-strong)}
.spec li::before{
  content:"";width:0.42rem;height:0.42rem;background:var(--primary);
  transform:translateY(-0.15em);
}
.spec b{color:var(--ink);font-weight:600}

.split{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,20rem),1fr));
  gap:clamp(1.5rem,3.5vw,3.25rem);margin-top:1.5rem;
}

/* services index */
.svc{display:block;text-decoration:none;color:inherit;border-bottom:1px solid var(--line)}
.svc:first-of-type{border-top:1px solid var(--line-strong)}
.svc-row{
  display:grid;grid-template-columns:5.5rem minmax(0,1fr) auto;
  gap:0 2rem;align-items:baseline;padding:1.75rem 0;
  transition:background 160ms var(--ease);
}
.svc:hover .svc-row{background:var(--surface)}
.svc-id{font-family:var(--mono);font-size:0.8rem;color:var(--primary)}
.svc-name{
  font-weight:600;font-stretch:104%;letter-spacing:-0.014em;
  font-size:clamp(1.15rem,1.05rem + 0.5vw,1.42rem);
}
.svc-sum{grid-column:2;color:var(--muted);font-size:0.955rem;margin-top:0.45rem;max-width:54ch}
.svc-go{
  grid-row:1;grid-column:3;color:var(--primary);font-size:0.9rem;
  white-space:nowrap;transition:transform 200ms var(--ease);
}
.svc:hover .svc-go{transform:translateX(3px)}
@media (max-width:760px){
  .svc-row{grid-template-columns:1fr;gap:0.35rem}
  .svc-id,.svc-sum,.svc-go{grid-column:1}
  .svc-go{grid-row:auto;margin-top:0.6rem}
}

/* related scopes */
.related{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--line-strong)}
.related h2{font-size:0.72rem;font-family:var(--mono);letter-spacing:0.09em;
  text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:1rem}
.related ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:0.6rem 1.6rem}
.related a{font-weight:500;text-decoration:none}
.related a:hover{text-decoration:underline}

.callout{
  margin-top:1.6rem;border:1px solid var(--line-strong);background:var(--surface);
  padding:1.15rem 1.3rem;max-width:46rem;
}
.callout p{font-size:0.95rem;color:var(--muted)}
.callout a{font-weight:500}

/* ---------- articles ---------- */
.amet{
  display:flex;flex-wrap:wrap;gap:0.5rem 1.1rem;align-items:baseline;
  font-family:var(--mono);font-size:0.72rem;letter-spacing:0.05em;
  color:var(--muted);margin-top:1.4rem;
}
.amet .sep{color:var(--line-strong)}

.answer{
  margin:2.25rem 0 0;padding:1.5rem 1.6rem;
  background:var(--surface);border:1px solid var(--line-strong);
  max-width:46rem;
}
.answer h2{
  font-family:var(--mono);font-size:0.72rem;font-weight:500;
  letter-spacing:0.09em;text-transform:uppercase;color:var(--primary);
  margin:0 0 0.7rem;
}
.answer p{color:var(--ink);font-size:1.05rem;line-height:1.55;max-width:none}
.answer p + p{margin-top:0.7rem}

.article{max-width:46rem}
.article h2{
  font-weight:600;font-stretch:106%;letter-spacing:-0.018em;
  font-size:clamp(1.32rem,1.1rem + 0.8vw,1.7rem);
  margin:2.75rem 0 0.9rem;
}
.article h3{margin:1.9rem 0 0.55rem}
.article p{color:var(--muted);max-width:none}
.article p + p{margin-top:0.9rem}
.article strong{color:var(--ink);font-weight:600}
.article ul:not(.spec){margin:1rem 0 0;padding-left:1.15rem;color:var(--muted)}
.article ul:not(.spec) li{margin-bottom:0.55rem;padding-left:0.25rem}
.article ul:not(.spec) li::marker{color:var(--primary)}

.disclaimer{
  margin-top:2.75rem;padding-top:1.25rem;border-top:1px solid var(--line-strong);
  font-size:0.87rem;color:var(--muted);max-width:46rem;
}
.disclaimer b{color:var(--ink);font-weight:600}

.nextstep{
  margin-top:2rem;padding:1.25rem 1.4rem;border:1px solid var(--line-strong);
  max-width:46rem;
}
.nextstep p{color:var(--muted);font-size:0.96rem}
.nextstep a{font-weight:500}