/* ---------------------------------------------------------------
   Shreya Mahajan portfolio
   Warm paper, ink, one petrol accent. Light only, deliberately.
   Type: Archivo (headings), Newsreader (prose), IBM Plex Mono (data)
   --------------------------------------------------------------- */
:root{
  --paper:#FFFFFF;
  --panel:#F7F7F8;
  --panel-2:#EFEFF1;
  --ink:#121214;
  --ink-soft:#6B6B72;
  --rule:#E4E4E7;
  --accent:#2749D4;
  --accent-ink:#1B3399;
  --accent-wash:#EDF0FD;
  --muted:#4A4A52;

  --sans:"Archivo","Helvetica Neue",Arial,sans-serif;
  --logo:"Sacramento","Snell Roundhand","Brush Script MT",cursive;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --band:1120px;
  --measure:100%;
  --s1:.5rem; --s2:1rem; --s3:1.5rem; --s4:2.5rem; --s5:4rem; --s6:6rem;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--serif);font-size:1.0625rem;line-height:1.62;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
.skip{position:absolute;left:-9999px}
.skip:focus{left:var(--s2);top:var(--s2);background:var(--ink);color:var(--paper);
  padding:.6rem 1rem;z-index:50;font-family:var(--sans);font-size:.875rem}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

.band{max-width:var(--band);margin:0 auto;padding-left:var(--s4);padding-right:var(--s4)}
@media (max-width:640px){.band{padding-left:1.25rem;padding-right:1.25rem}}
.measure{max-width:var(--measure)}

/* ---------- masthead ---------- */
.masthead{border-bottom:1px solid var(--accent);background:var(--paper)}
/* true hairline on retina, falls back to 1px elsewhere */
@supports (border-bottom-width:0.25px){
  .masthead{border-bottom-width:0.25px}
}
.masthead-in{display:flex;align-items:center;justify-content:space-between;
  gap:var(--s3);padding-top:1.15rem;padding-bottom:.5rem;flex-wrap:wrap}
.wordmark{text-decoration:none;display:flex;flex-direction:column;
  align-items:stretch;width:max-content;gap:.14rem;line-height:1}
.wordmark-name{
  font-family:var(--logo);font-weight:400;font-size:1.85rem;line-height:1;
  letter-spacing:.004em;padding-bottom:.1rem;
}
.wordmark:hover .wordmark-name{color:var(--accent)}
.wordmark-role{font-family:var(--mono);font-size:.625rem;text-transform:uppercase;
  letter-spacing:.14em;color:var(--ink-soft);width:100%;text-align:right;
  padding-right:.1rem}
.masthead nav{display:flex;gap:1.6rem;font-family:var(--sans);font-size:.9375rem}
.masthead nav a{text-decoration:none;color:var(--ink-soft)}
.masthead nav a:hover{color:var(--accent)}
.masthead nav a[aria-current]{color:var(--ink);position:relative}
.masthead nav a[aria-current]::after{content:"";position:absolute;left:0;right:0;
  bottom:-.42rem;height:2px;background:var(--accent)}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--sans);font-weight:700;letter-spacing:-.021em;
  text-wrap:balance;margin:0}
h1{font-size:clamp(2.1rem,5.6vw,4rem);line-height:1.06}
h2{font-size:clamp(1.5rem,3vw,2.05rem);line-height:1.16}
h3{font-size:1.1875rem;line-height:1.3;font-weight:600}
h4{font-size:1rem;font-weight:600}
p{margin:0 0 1.1rem}
.lede{font-size:clamp(1.125rem,2vw,1.3125rem);line-height:1.5;color:var(--ink)}
.dek{color:var(--ink-soft)}
strong{font-weight:500}

.eyebrow{font-family:var(--mono);font-size:.6875rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.15em;color:var(--accent);
  margin:0 0 var(--s2)}

/* ---------- sections ---------- */
section{padding-top:var(--s6);padding-bottom:var(--s6)}
.hero + section{padding-top:var(--s5)}
section + section{border-top:1px solid var(--rule)}
@media (max-width:640px){section{padding-top:var(--s5);padding-bottom:var(--s5)}}
.sec-head{margin-bottom:var(--s4)}

/* ---------- page title ---------- */
.ptitle{padding-top:clamp(3.5rem,7vw,6rem);padding-bottom:clamp(2rem,4vw,3rem);
  border-bottom:1px solid var(--rule)}
.ptitle h1{max-width:none}
.ptitle .lede{max-width:none;margin-top:var(--s3)}

/* ---------- contact ---------- */
.contact-list{list-style:none;margin:var(--s4) 0 0;padding:0;
  border-top:1px solid var(--rule);max-width:none}
.contact-list li{border-bottom:1px solid var(--rule);padding:1.4rem 0;
  display:grid;grid-template-columns:8.5rem 1fr;gap:var(--s3);align-items:baseline}
.contact-list dt,.contact-list .k{font-family:var(--mono);font-size:.6875rem;
  text-transform:uppercase;letter-spacing:.11em;color:var(--ink-soft)}
.contact-list .v{font-family:var(--sans);font-size:1.25rem;font-weight:600;
  letter-spacing:-.015em}
.contact-list .v a{color:var(--accent);text-decoration:none}
.contact-list .v a:hover{text-decoration:underline;text-underline-offset:3px}
.contact-list .n{display:block;font-family:var(--serif);font-size:.9375rem;
  font-weight:400;color:var(--ink-soft);letter-spacing:0;margin-top:.3rem}
@media (max-width:620px){.contact-list li{grid-template-columns:1fr;gap:.4rem}}

/* ---------- hero ---------- */
.hero{padding-top:clamp(4.5rem,9vw,9rem);padding-bottom:clamp(3.5rem,6vw,6rem)}
.hero-full{
  min-height:calc(100vh - 5.1rem);
  min-height:calc(100svh - 5.1rem);
  display:flex;flex-direction:column;justify-content:center;
  padding-top:clamp(3rem,6vw,5rem);padding-bottom:clamp(3rem,6vw,5rem)}
.hero-body{margin-block:auto}
.hero h1 .dot{color:var(--accent)}
.hero-row .hero-meta{position:relative;padding-top:var(--s3)}
.hero-row .hero-meta::before{content:"";position:absolute;top:0;left:0;
  width:3.25rem;height:2px;background:var(--accent)}
.hero-more a i{color:var(--accent)}
.hero-more{margin:0;padding-top:var(--s4)}
.hero-more a{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;
  letter-spacing:.14em;color:var(--ink-soft);text-decoration:none;
  display:inline-flex;align-items:center;gap:.6rem}
.hero-more a:hover{color:var(--accent)}
.hero-more i{font-style:normal;font-size:.9rem;line-height:1}
@media (max-width:760px){.hero-full{min-height:0}.hero-body{margin-block:0}}
.hero h1{max-width:none}
.hero-row{margin-top:var(--s4)}
.hero .lede{max-width:none;margin:0}
.hero-row .hero-meta{margin:var(--s3) 0 0}
.hero-meta{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;
  font-family:var(--mono);font-size:.75rem;color:var(--ink-soft);
  text-transform:uppercase;letter-spacing:.09em}

/* ---------- experience pillars ---------- */
.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));
  gap:1px;background:var(--rule);border:1px solid var(--rule);margin:var(--s4) 0}
.pillar{background:var(--paper);padding:1.4rem 1.3rem}
.pillar h3{font-size:1.1875rem;margin:0 0 .6rem}
.pillar p{font-size:.9375rem;line-height:1.5;color:var(--ink-soft);margin:0 0 .7rem}
.pillar p:last-child{margin:0}
.pillar em{font-style:normal;color:var(--ink);font-family:var(--mono);
  font-size:.75rem;letter-spacing:.04em}
.pillar .because{color:var(--accent);font-family:var(--mono);font-size:.6875rem;
  text-transform:uppercase;letter-spacing:.11em;display:block;margin-bottom:.25rem}

/* ---------- figure numbers / data strip ---------- */
.figures{display:grid;grid-template-columns:repeat(auto-fit,minmax(11rem,1fr));
  gap:1px;background:var(--rule);border:1px solid var(--rule);margin:var(--s4) 0}
.fig{background:var(--paper);padding:1.3rem 1.25rem}
.fig-n{font-family:var(--mono);font-size:1.55rem;font-weight:500;
  letter-spacing:-.02em;font-variant-numeric:tabular-nums;display:block}
.fig-l{font-family:var(--sans);font-size:.8125rem;color:var(--ink-soft);
  margin-top:.35rem;display:block;line-height:1.35}

/* ---------- work index ---------- */
.work-list{display:grid;gap:1px;background:var(--rule);
  border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.work-item{background:var(--paper);text-decoration:none;display:grid;
  grid-template-columns:7.5rem 1fr 2rem;gap:var(--s3);align-items:start;
  padding:1.75rem .25rem}
.work-item:hover{background:var(--panel)}
.work-cat{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;
  letter-spacing:.11em;color:var(--ink-soft);padding-top:.3rem}
.work-title{font-family:var(--sans);font-weight:700;font-size:1.3125rem;
  letter-spacing:-.018em;margin:0 0 .35rem}
.work-desc{color:var(--ink-soft);margin:0;font-size:1rem;max-width:none}
.work-go{font-family:var(--mono);font-size:1rem;color:var(--accent);padding-top:.35rem}
.work-item[data-draft="1"] .work-go{color:var(--ink-soft)}
@media (max-width:720px){
  .work-item{grid-template-columns:1fr;gap:.5rem;padding:1.5rem .25rem}
  .work-go{display:none}
}
.tag-draft{font-family:var(--mono);font-size:.625rem;text-transform:uppercase;
  letter-spacing:.1em;color:var(--ink-soft);border:1px solid var(--rule);
  border-radius:2px;padding:.1rem .4rem;margin-left:.6rem;vertical-align:.12em;
  white-space:nowrap}

/* ---------- 6D rail ---------- */
.rail{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;
  background:var(--rule);border:1px solid var(--rule);margin-top:var(--s4)}
.rail-step{background:var(--paper);padding:1.15rem 1rem}
.rail-k{font-family:var(--mono);font-size:1.0625rem;font-weight:500;
  color:var(--accent);letter-spacing:.02em;display:block;margin-bottom:.55rem;
  font-variant-numeric:tabular-nums;line-height:1}
.rail-n{font-family:var(--sans);font-weight:600;font-size:.9375rem;display:block;
  margin-bottom:.3rem}
.rail-d{font-size:.875rem;color:var(--ink-soft);line-height:1.4;margin:0}
.rail-loop + .rail{margin-top:0}
.rail-loop{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;
  margin-bottom:0;color:var(--accent)}
.loop-cell{grid-column:4 / span 2;padding:0 .5rem;display:flex;
  flex-direction:column;align-items:center}
.loop-label{font-family:var(--mono);font-size:.625rem;text-transform:uppercase;
  letter-spacing:.14em;margin-bottom:.15rem}
.loop-cell svg{width:100%;height:50px;display:block;overflow:visible}
@media (max-width:1024px){.rail-loop{display:none}}

.rail-notes{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;
  margin-top:.5rem;color:var(--accent)}
.rail-note{display:flex;flex-direction:column;padding:0 .5rem}
.rail-note.n-first{grid-column:1 / span 2}
.rail-note.n3{grid-column:3}
.rail-note.n4{grid-column:4}
.rail-note.n5{grid-column:5}
.rail-note.n-last{grid-column:6 / span 1}
.anno-bracket{height:.7rem;border:1.5px solid currentColor;border-top:0;
  border-radius:0 0 .55rem .55rem;opacity:.75}
.anno-text{font-family:var(--logo);font-size:1.0625rem;line-height:1.2;
  margin-top:.45rem;letter-spacing:.005em}
.rail-note.n-last .anno-text{text-align:right}
@media (max-width:1024px){.rail-notes{display:none}}

@media (max-width:860px){.rail{grid-template-columns:repeat(3,1fr)}}
@media (max-width:520px){.rail{grid-template-columns:repeat(2,1fr)}}

/* ---------- case study ---------- */
.cs-head{padding-top:var(--s5);padding-bottom:var(--s4);
  border-bottom:1px solid var(--rule)}
.cs-head h1{max-width:none}
.cs-sub{max-width:none;margin-top:var(--s3)}
.cs-facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));
  gap:var(--s3);margin-top:var(--s4);padding-top:var(--s3);
  border-top:1px solid var(--rule)}
.cs-fact dt{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;
  letter-spacing:.1em;color:var(--ink-soft);margin-bottom:.3rem}
.cs-fact dd{margin:0;font-family:var(--sans);font-size:.9375rem;line-height:1.4}

.cs-body section{padding-top:var(--s5);padding-bottom:var(--s5)}
.cs-body h2{margin-bottom:var(--s2)}
.cs-body .measure > :last-child{margin-bottom:0}

/* pull quotes from research */
.quote{border-left:2px solid var(--accent);padding:.2rem 0 .2rem 1.4rem;
  margin:var(--s3) 0;max-width:var(--measure)}
.quote p{font-size:1.1875rem;line-height:1.5;margin:0 0 .5rem}
.quote cite{font-family:var(--mono);font-size:.75rem;font-style:normal;
  color:var(--ink-soft);letter-spacing:.04em}

/* before / after */
.ba{display:grid;grid-template-columns:1fr 1fr;gap:var(--s3);margin:var(--s3) 0}
.ba-col{border:1px solid var(--rule);padding:1.25rem}
.ba-col h4{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;
  letter-spacing:.11em;margin:0 0 .7rem}
.ba-before h4{color:var(--ink-soft)}
.ba-after h4{color:var(--accent)}
.ba-col ul{margin:0;padding-left:1.1rem}
.ba-col li{margin-bottom:.5rem;font-size:.9375rem;line-height:1.45}
.ba-col li:last-child{margin-bottom:0}
@media (max-width:720px){.ba{grid-template-columns:1fr}}

/* image slots awaiting the real screens */
.shot{border:1px solid var(--rule);background:var(--panel);margin:var(--s3) 0}
.shot img{width:100%}
.shot-wait{aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;
  padding:var(--s3);background:repeating-linear-gradient(135deg,
    var(--panel),var(--panel) 10px,var(--panel-2) 10px,var(--panel-2) 20px)}
.shot-wait span{font-family:var(--mono);font-size:.75rem;color:var(--ink-soft);
  background:var(--paper);padding:.5rem .8rem;border:1px solid var(--rule);
  text-align:center;line-height:1.5;max-width:30ch}
.shot figcaption{font-family:var(--sans);font-size:.8125rem;color:var(--ink-soft);
  padding:.7rem 1rem;border-top:1px solid var(--rule);background:var(--paper)}

/* list of findings */
.findings{list-style:none;margin:var(--s3) 0;padding:0;
  border-top:1px solid var(--rule)}
.findings li{border-bottom:1px solid var(--rule);padding:1rem 0;
  display:grid;grid-template-columns:2.2rem 1fr;gap:var(--s2)}
.findings b{font-family:var(--mono);font-size:.75rem;color:var(--accent);
  font-weight:500;padding-top:.28rem}
.findings p{margin:0;font-size:1rem}
.findings p span{display:block;color:var(--ink-soft);font-size:.9375rem;margin-top:.2rem}

/* draft notice on incomplete case studies */
.draft{border:1px solid var(--rule);border-left:3px solid var(--accent);background:var(--panel);padding:1.1rem 1.3rem;
  margin:var(--s4) 0;max-width:var(--measure)}
.draft p{margin:0;font-size:.9375rem;line-height:1.5}
.draft b{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;
  letter-spacing:.11em;color:var(--accent);display:block;margin-bottom:.4rem;
  font-weight:500}

/* prev / next */
.pager{display:flex;justify-content:space-between;gap:var(--s3);
  border-top:1px solid var(--rule);padding-top:var(--s3);margin-top:var(--s5);
  flex-wrap:wrap}
.pager a{text-decoration:none;max-width:22rem}
.pager span{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;
  letter-spacing:.11em;color:var(--ink-soft);display:block;margin-bottom:.3rem}
.pager b{font-family:var(--sans);font-size:1rem;font-weight:600}
.pager a:hover b{color:var(--accent)}
.pager .nx{text-align:right;margin-left:auto}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 17rem;gap:var(--s5);align-items:start}
@media (max-width:860px){.about-grid{grid-template-columns:1fr;gap:var(--s4)}}
.side h3{font-family:var(--mono);font-size:.6875rem;text-transform:uppercase;
  letter-spacing:.12em;color:var(--ink-soft);font-weight:500;margin:0 0 .7rem}
.side ul{list-style:none;margin:0 0 var(--s4);padding:0}
.side li{font-family:var(--sans);font-size:.9375rem;padding:.3rem 0;
  border-bottom:1px solid var(--rule)}
.side li:first-child{border-top:1px solid var(--rule)}

/* known-for list */
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:var(--s3) 0;padding:0;list-style:none}
.chips li{font-family:var(--sans);font-size:.875rem;border:1px solid var(--rule);
  border-radius:999px;padding:.32rem .85rem;background:var(--paper)}

/* footer */
footer{border-top:1px solid var(--rule);background:var(--panel)}
.foot-in{display:flex;justify-content:space-between;gap:var(--s3);flex-wrap:wrap;
  padding-top:var(--s4);padding-bottom:var(--s4)}
.foot-name{font-family:var(--logo);font-weight:400;font-size:1.65rem;
  line-height:1;margin:0 0 .5rem;letter-spacing:.004em}
.foot-role{font-size:.9375rem;color:var(--ink-soft);margin:0}
.foot-links{list-style:none;margin:0;padding:0;font-family:var(--sans);font-size:.9375rem}
.foot-links li{margin-bottom:.35rem}

/* private-build banner */
.gate-note{background:var(--ink);color:#fff;font-family:var(--mono);
  font-size:.75rem;text-align:center;padding:.55rem 1rem;letter-spacing:.03em}

.c{font-style:normal}

/* ===============================================================
   UI reconstructions
   Drawn in CSS, not screenshots. The Arabic variant is the same
   markup with dir="rtl"; the brand variant is the same markup with
   different custom properties. That is the mechanism the project
   actually used, so the demo is the argument.
   =============================================================== */
.recon{margin:var(--s4) 0}
.recon-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));
  gap:var(--s3);align-items:start}
.recon-cap{font-family:var(--sans);font-size:.8125rem;color:var(--ink-soft);
  margin:.9rem 0 0;line-height:1.45}
.recon-cap b{font-family:var(--mono);font-size:.625rem;text-transform:uppercase;
  letter-spacing:.11em;color:var(--ink-soft);font-weight:500;display:block;
  margin-bottom:.3rem}

/* --- phone --- */
.phone{
  --brand:#2749D4; --brand-ink:#1B3399; --brand-wash:#EDF0FD; --on-brand:#FFFFFF;
  width:100%;max-width:17rem;margin:0 auto;background:#FFF;
  border:1px solid var(--rule);border-radius:1.4rem;overflow:hidden;
  font-family:var(--sans);color:#15171A;box-shadow:0 1px 2px rgba(0,0,0,.05)}
.phone.alt{--brand:#17236E; --brand-ink:#0F1847; --brand-wash:#EAECF6}
.phone-bar{display:flex;justify-content:space-between;align-items:center;
  padding:.5rem .9rem .2rem;font-size:.625rem;font-weight:600;color:#6B7076;
  font-family:var(--mono)}
.phone-bar i{display:inline-block;width:1rem;height:.42rem;border:1px solid #9AA0A6;
  border-radius:1px;font-style:normal}
.phone-in{padding:.5rem .9rem 1rem}
.ph-greet{display:flex;align-items:center;justify-content:space-between;gap:.4rem;
  margin-bottom:.6rem}
.ph-greet b{font-size:.8125rem;font-weight:700}
.ph-greet span{font-size:.5625rem;color:#7A8086;display:block;font-weight:400;
  margin-top:.08rem}
.ph-dots{display:flex;gap:.28rem}
.ph-dots i{width:.72rem;height:.72rem;border:1px solid #C8CDD2;border-radius:50%;
  display:block}
.ph-search{background:#F1F3F4;border-radius:999px;height:1.45rem;margin-bottom:.7rem;
  display:flex;align-items:center;padding:0 .55rem;gap:.35rem}
.ph-search i{width:.5rem;height:.5rem;border:1.2px solid #9AA0A6;border-radius:50%;
  display:block;flex:none}
.ph-search span{font-size:.5625rem;color:#9AA0A6}
.ph-bal{margin-bottom:.6rem}
.ph-bal span{font-size:.5625rem;color:#7A8086;display:block;margin-bottom:.1rem}
.ph-bal b{font-size:1.05rem;font-weight:700;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums}
.ph-bal b em{font-style:normal;font-size:.625rem;color:#7A8086;font-weight:500;
  margin-inline-start:.2rem}
.ph-tabs{display:flex;gap:.9rem;border-bottom:1px solid #E8EBED;margin-bottom:.6rem;
  font-size:.5625rem;color:#7A8086}
.ph-tabs b{font-weight:600;color:var(--brand-ink);border-bottom:2px solid var(--brand);
  padding-bottom:.3rem;margin-bottom:-1px}
.ph-tabs span{padding-bottom:.3rem}
.ph-card{background:var(--brand);color:var(--on-brand);border-radius:.6rem;
  padding:.6rem .7rem;margin-bottom:.6rem}
.ph-card u{text-decoration:none;font-size:.5625rem;opacity:.85;display:block}
.ph-card b{font-size:.8125rem;font-weight:700;display:block;margin-top:.15rem;
  font-variant-numeric:tabular-nums}
.ph-card p{margin:.35rem 0 0;font-size:.5rem;opacity:.8;
  font-family:var(--mono);letter-spacing:.04em}
.ph-quick{margin-bottom:.6rem}
.ph-quick > span{font-size:.5625rem;color:#7A8086;display:block;margin-bottom:.4rem}
.ph-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.4rem}
.ph-tile{text-align:center}
.ph-tile i{display:block;width:100%;aspect-ratio:1;border-radius:.45rem;
  background:var(--brand-wash);margin-bottom:.22rem;position:relative}
.ph-tile i::after{content:"";position:absolute;inset:32%;border:1.4px solid var(--brand);
  border-radius:1px}
.ph-tile.r i::after{border-radius:50%}
.ph-tile span{font-size:.4375rem;color:#5C6166;line-height:1.2;display:block}
.ph-offer{border:1px solid #E8EBED;border-radius:.6rem;padding:.5rem .6rem;
  display:flex;gap:.5rem;align-items:center}
.ph-offer i{width:1.8rem;height:1.8rem;border-radius:.35rem;background:var(--brand-wash);
  flex:none}
.ph-offer b{font-size:.5625rem;font-weight:600;display:block}
.ph-offer span{font-size:.5rem;color:#7A8086;display:block;margin-top:.1rem}
.ph-nav{display:flex;justify-content:space-between;border-top:1px solid #E8EBED;
  padding:.5rem .9rem .6rem;margin-top:.2rem}
.ph-nav i{width:.9rem;height:.9rem;border:1.4px solid #C8CDD2;border-radius:.18rem;
  display:block}
.ph-nav i:first-child{border-color:var(--brand);background:var(--brand-wash)}

/* --- desktop --- */
.desk{background:#FFF;border:1px solid var(--rule);border-radius:.5rem;
  overflow:hidden;font-family:var(--sans);color:#15171A;
  --brand:#2749D4; --brand-wash:#EDF0FD; --brand-ink:#1B3399}
.desk-bar{background:#F1F3F4;padding:.45rem .7rem;display:flex;gap:.3rem;
  border-bottom:1px solid #E8EBED}
.desk-bar i{width:.42rem;height:.42rem;border-radius:50%;background:#C8CDD2;display:block}
.desk-top{display:flex;align-items:center;gap:1rem;padding:.6rem .9rem;
  border-bottom:1px solid #E8EBED;font-size:.5625rem;color:#7A8086}
.desk-top b{font-weight:700;font-size:.6875rem;color:#15171A}
.desk-top .on{color:var(--brand-ink);font-weight:600}
.desk-body{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:.7rem;padding:.9rem}
.desk-panel{border:1px solid #E8EBED;border-radius:.4rem;padding:.6rem}
.desk-panel h5{margin:0 0 .45rem;font-size:.5625rem;font-weight:600;color:#5C6166}
.desk-row{display:flex;justify-content:space-between;font-size:.5rem;
  padding:.3rem 0;border-bottom:1px solid #F1F3F4;font-variant-numeric:tabular-nums}
.desk-row:last-child{border-bottom:0}
.desk-row span{color:#7A8086;font-family:var(--mono);letter-spacing:.02em}
.desk-pill{display:inline-block;font-size:.4375rem;padding:.1rem .35rem;border-radius:999px;
  background:var(--brand-wash);color:var(--brand-ink);font-weight:600}
.desk-big{font-size:.9rem;font-weight:700;letter-spacing:-.02em;display:block;
  margin-bottom:.1rem;font-variant-numeric:tabular-nums}
.desk-big em{font-style:normal;font-size:.5rem;color:#7A8086;margin-inline-start:.2rem}
@media (max-width:640px){.desk-body{grid-template-columns:1fr}}

/* --- variable diagram --- */
.vars{display:grid;grid-template-columns:1fr auto 1fr;gap:var(--s3);align-items:center;
  border:1px solid var(--rule);padding:var(--s3);background:var(--panel)}
.vars-box{background:var(--paper);border:1px solid var(--rule);padding:.9rem 1rem}
.vars-box h5{margin:0 0 .5rem;font-family:var(--mono);font-size:.625rem;
  text-transform:uppercase;letter-spacing:.11em;color:var(--accent);font-weight:500}
.vars-box ul{margin:0;padding-left:1rem;font-size:.8125rem;line-height:1.6}
.vars-arrow{font-family:var(--mono);color:var(--ink-soft);font-size:1.1rem}
.vars-out{display:grid;gap:.4rem}
.vars-chip{background:var(--paper);border:1px solid var(--rule);padding:.4rem .6rem;
  font-family:var(--mono);font-size:.6875rem;letter-spacing:.02em}
@media (max-width:720px){
  .vars{grid-template-columns:1fr}
  .vars-arrow{text-align:center;transform:rotate(90deg)}
}