/* Iftekhar Khan: site styles. The page is treated as a drawing set. */
:root{
  --bg:#FBFAF7;
  --surface:#EFF1F2;
  --surface-2:#F6F6F3;
  --ink:#1C2733;
  --primary:#1B3A5C;
  --primary-ink:#FFFFFF;
  --accent:#8A6D3B;
  --muted:#55616E;
  --line:#DCE0E2;
  --shadow:0 1px 2px rgba(27,58,92,.06),0 8px 24px rgba(27,58,92,.07);
  --flag:#2F6F5E;
  --bp:#0E2A47;
  --bp-2:#143659;
  --bp-ink:#EAF1F8;
  --bp-muted:#A9BFD4;
  --bp-line:#BCD3EA;
  --brass:#E3BC74;
  --serif:"Source Serif 4",Georgia,serif;
  --sans:"IBM Plex Sans",Arial,sans-serif;
  --mono:"IBM Plex Mono",Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#12161C;--surface:#1A212B;--surface-2:#161C24;--ink:#E7EBEF;--primary:#8FB4D6;
    --primary-ink:#0E1620;--accent:#D9B268;--muted:#9AA5B0;--line:#2A3542;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.28);--flag:#7CC7AE;
    --bp:#0C1D30;--bp-2:#102740;
  }
}
:root[data-theme="dark"]{
  --bg:#12161C;--surface:#1A212B;--surface-2:#161C24;--ink:#E7EBEF;--primary:#8FB4D6;
  --primary-ink:#0E1620;--accent:#D9B268;--muted:#9AA5B0;--line:#2A3542;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.28);--flag:#7CC7AE;
  --bp:#0C1D30;--bp-2:#102740;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:76px;-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  -webkit-font-smoothing:antialiased;font-size:16px;line-height:1.55;
}
[data-lang="en"] .fr{display:none!important;}
[data-lang="fr"] .en{display:none!important;}
h1,h2,h3{font-family:var(--serif);text-wrap:balance;color:var(--primary);}
a{color:inherit;}
svg{display:block;}
button{font:inherit;color:inherit;}
.container{max-width:1040px;margin:0 auto;padding:0 24px;}
section{padding:72px 0;border-top:1px solid var(--line);}
.eyebrow{
  text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:600;
  color:var(--accent);margin:0 0 14px;
}

/* Sheet numbers beside each heading */
.section-head{margin-bottom:32px;}
.section-head::before{
  display:block;font:500 11.5px var(--mono);letter-spacing:.08em;color:var(--accent);margin-bottom:10px;
}
#about .section-head::before{content:"A-101";}
#demo .section-head::before{content:"A-102";}
#process .section-head::before{content:"A-103";}
#experience .section-head::before{content:"A-104";}
#project .section-head::before{content:"A-105";}
#skills .section-head::before{content:"A-106";}
#credentials .section-head::before{content:"A-107";}
#contact .section-head::before{content:"A-108";}
.section-head h2{font-size:clamp(24px,3.4vw,32px);line-height:1.15;margin:0;}

/* ---- Focus ---- */
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}
.hero a:focus-visible,.hero button:focus-visible{outline-color:var(--brass);}

/* ---- Nav ---- */
header.nav{
  position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1040px;margin:0 auto;padding:12px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.nav-name{font-family:var(--serif);font-weight:600;font-size:17px;color:var(--primary);text-decoration:none;white-space:nowrap;}
.nav-links{display:flex;gap:4px;list-style:none;margin:0;padding:0;}
.nav-links a{
  position:relative;display:block;padding:7px 10px;font-size:13.5px;font-weight:500;text-decoration:none;
  color:var(--muted);transition:color .18s;
}
.nav-links a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:2px;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after,.nav-links a[aria-current="true"]::after{transform:scaleX(1);}
.nav-links a[aria-current="true"]{color:var(--primary);}
.controls{display:flex;align-items:center;gap:8px;}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--surface);}
.seg button{
  border:0;background:transparent;padding:6px 10px;font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--muted);cursor:pointer;transition:background .18s,color .18s;
}
.seg button[aria-pressed="true"]{background:var(--primary);color:var(--primary-ink);}
.seg button:not([aria-pressed="true"]):hover{color:var(--primary);}
.icon-btn{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);
  transition:border-color .18s,transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--primary);}
.icon-btn:active{transform:scale(.94);}
#menuBtn{display:none;}
.theme-moon{display:none;}
:root[data-mode="dark"] .theme-sun{display:none;}
:root[data-mode="dark"] .theme-moon{display:block;}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:5px;font-weight:600;font-size:14px;
  text-decoration:none;border:1px solid transparent;font-family:inherit;cursor:pointer;
  background:transparent;
  transition:transform .18s var(--ease),box-shadow .18s,background .18s,color .18s,border-color .18s;
}
.btn svg{flex:0 0 auto;transition:transform .22s var(--ease);}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.btn:active{transform:translateY(0) scale(.98);box-shadow:none;}
.btn.primary{background:var(--primary);color:var(--primary-ink);}
.btn.secondary{color:var(--primary);border-color:var(--primary);}
.btn.secondary:hover{background:var(--primary);color:var(--primary-ink);}
.btn:hover .i-arrow{transform:translate(2px,-2px);}
.btn:hover .i-down{transform:translateY(2px);}
.btn:hover .i-mail{transform:scale(1.1);}
.cta{display:flex;gap:12px;flex-wrap:wrap;}
.btn.copied{border-color:var(--flag);color:var(--flag);background:transparent;}
.btn .i-check{display:none;}
.btn.copied .i-check{display:block;}
.btn.copied .i-copy{display:none;}

/* ---- Hero ---- */
.hero{
  padding:64px 0 56px;border-top:0;color:var(--bp-ink);background-color:var(--bp);
  background-image:
    linear-gradient(rgba(188,211,234,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(188,211,234,.055) 1px,transparent 1px);
  background-size:28px 28px;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:48px;align-items:center;}
.hero .eyebrow{color:var(--brass);}
.hero h1{color:#fff;font-size:clamp(38px,5.6vw,58px);margin:0 0 16px;line-height:1.04;letter-spacing:-.01em;}
.hero .role{font-size:17px;color:var(--bp-muted);margin:0 0 20px;line-height:1.6;}
.hero .role b{color:var(--bp-ink);font-weight:600;}
.tags{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0 0 28px;padding:0;list-style:none;font:500 12.5px var(--mono);color:var(--bp-ink);}
.tags li::before{content:"+ ";color:var(--brass);}
.hero .cta{gap:10px;}
.hero .btn{padding:11px 15px;}
.hero .btn.primary{background:var(--brass);color:#14263A;}
.hero .btn.secondary{color:var(--bp-ink);border-color:rgba(188,211,234,.5);}
.hero .btn.secondary:hover{background:var(--bp-ink);color:var(--bp);border-color:var(--bp-ink);}

/* The elevation */
.sheet{min-width:0;}
.elev{width:100%;height:auto;overflow:visible;}
.elev text{font-family:var(--mono);fill:var(--bp-muted);font-size:13px;}
.elev .bub text{fill:var(--bp-ink);font-weight:500;font-size:14px;text-anchor:middle;}
.elev .bub circle{fill:none;stroke:var(--bp-line);stroke-width:1.2;}
.l-grid{stroke:var(--bp-line);stroke-opacity:.38;stroke-width:1;stroke-dasharray:9 4 2 4;fill:none;}
.l-main{stroke:var(--bp-ink);stroke-width:2.2;fill:none;}
.l-thin{stroke:var(--bp-line);stroke-width:1.2;fill:none;}
.l-faint{stroke:var(--bp-line);stroke-opacity:.6;stroke-width:1;fill:none;}
.joints{stroke:none;}
.zone{fill:transparent;stroke:transparent;stroke-width:2;cursor:pointer;transition:fill .3s,stroke .3s;}
.zone.on{fill:rgba(227,188,116,.2);stroke:var(--brass);}

.layers{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:14px;}
.layer{
  text-align:left;padding:9px 11px;border-radius:5px;cursor:pointer;background:rgba(188,211,234,.07);
  border:1px solid rgba(188,211,234,.25);color:var(--bp-ink);
  transition:background .2s,border-color .2s,transform .18s var(--ease);
}
.layer:hover{border-color:var(--bp-line);transform:translateY(-1px);}
.layer[aria-pressed="true"]{background:rgba(227,188,116,.16);border-color:var(--brass);}
.layer span{display:block;font-size:12px;color:var(--bp-muted);line-height:1.3;}
.layer b{display:block;font:500 14px var(--mono);margin-top:3px;color:#fff;white-space:nowrap;}
.sheet-note{margin:10px 0 0;font:400 11.5px var(--mono);color:var(--bp-muted);}

/* Draw the elevation once, unless motion is off */
@media (prefers-reduced-motion:no-preference){
  .js .draw{stroke-dasharray:1;stroke-dashoffset:1;animation:draw 1.1s var(--ease) forwards;animation-delay:var(--d,0s);}
  .js .fade{opacity:0;animation:fade .7s ease forwards;animation-delay:var(--d,0s);}
  .js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s var(--ease);}
  .js .reveal.in{opacity:1;transform:none;}
}
@keyframes draw{to{stroke-dashoffset:0;}}
@keyframes fade{to{opacity:1;}}

/* ---- Results ---- */
.results{padding:0;border-top:0;border-bottom:1px solid var(--line);background:var(--surface-2);}
.result-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));}
.result{padding:24px 20px;border-left:1px solid var(--line);}
.result:first-child{border-left:0;padding-left:0;}
.result b{display:block;font-family:var(--serif);font-size:30px;line-height:1.1;color:var(--primary);font-weight:600;}
.result span{display:block;margin-top:6px;font-size:13px;line-height:1.4;color:var(--muted);}

/* ---- About ---- */
.about p{max-width:68ch;color:var(--ink);font-size:16px;line-height:1.7;margin:0;}

/* ---- Bid-leveling demo ---- */
.demo{background:var(--surface-2);}
.lede{max-width:66ch;color:var(--muted);margin:-16px 0 28px;font-size:16px;}
.bidtab{border:1px solid var(--line);border-radius:8px;background:var(--bg);box-shadow:var(--shadow);overflow:hidden;}
.verdict{
  padding:16px 20px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500;color:var(--ink);
  min-height:58px;display:flex;align-items:center;
}
.verdict.flip{animation:flip .7s ease;}
@keyframes flip{0%{background:color-mix(in srgb,var(--accent) 24%,transparent);}100%{background:transparent;}}
.strip{padding:18px 20px 8px;border-bottom:1px solid var(--line);}
.lane{display:grid;grid-template-columns:52px minmax(0,1fr);align-items:center;gap:10px;height:30px;}
.lane-name{font:500 12.5px var(--mono);color:var(--muted);}
.lane.low .lane-name{color:var(--accent);}
.track{position:relative;height:100%;}
.track::before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:var(--line);}
.dot{
  position:absolute;top:50%;width:12px;height:12px;margin:-6px 0 0 -6px;border-radius:50%;
  transition:left .5s var(--ease),background .3s,border-color .3s;
}
.dot.base{background:var(--bg);border:2px solid var(--muted);}
.dot.lev{background:var(--muted);}
.lane.low .dot.lev{background:var(--accent);}
.span{position:absolute;top:50%;height:3px;margin-top:-1.5px;background:var(--muted);opacity:.45;transition:left .5s var(--ease),width .5s var(--ease);}
.lane.low .span{background:var(--accent);opacity:.7;}
.axis{position:relative;height:22px;margin-left:62px;font:400 11px var(--mono);color:var(--muted);}
.axis span{position:absolute;top:4px;transform:translateX(-50%);white-space:nowrap;}
.legend{display:flex;gap:16px;padding:0 0 8px 62px;font-size:12px;color:var(--muted);}
.legend i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:-1px;}
.legend .k-base{background:var(--bg);border:2px solid var(--muted);}
.legend .k-lev{background:var(--muted);}
.tabwrap{overflow-x:auto;}
.bid{width:100%;border-collapse:collapse;font-size:14px;}
.bid th,.bid td{padding:10px 12px;text-align:right;border-bottom:1px solid var(--line);font-weight:400;}
.bid th:first-child,.bid td:first-child{text-align:left;padding-left:20px;}
.bid th:last-child,.bid td:last-child{padding-right:20px;}
.bid thead th{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;}
.bid td.num{font:400 13.5px var(--mono);white-space:nowrap;font-variant-numeric:tabular-nums;}
.bid .inc{color:var(--muted);font-family:var(--sans);font-size:12.5px;}
.bid .exc{color:var(--accent);font-family:var(--sans);font-size:12.5px;font-weight:600;}
.bid .add{color:var(--accent);font-weight:500;}
.bid tfoot td{border-bottom:0;font-weight:600;background:var(--surface-2);}
.bid td.isLow{color:var(--accent);}
.lowflag{display:block;font:600 10.5px var(--sans);letter-spacing:.05em;text-transform:uppercase;margin-top:2px;height:14px;}
.sw{display:flex;align-items:center;gap:10px;cursor:pointer;}
.sw input{position:absolute;opacity:0;width:1px;height:1px;}
.sw i{
  flex:0 0 auto;position:relative;width:34px;height:20px;border-radius:10px;background:var(--line);
  transition:background .2s;
}
.sw i::after{
  content:"";position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:#fff;
  box-shadow:0 1px 2px rgba(0,0,0,.3);transition:transform .2s var(--ease);
}
.sw input:checked + i{background:var(--accent);}
.sw input:checked + i::after{transform:translateX(14px);}
.sw input:focus-visible + i{outline:2px solid var(--accent);outline-offset:2px;}
.bid-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:14px 20px;}
.bid-foot .cta{gap:8px;}
.bid-foot .btn{padding:8px 14px;font-size:13px;}
.note{margin:0;font-size:12.5px;color:var(--muted);}

/* ---- Process ---- */
.process-list{display:flex;flex-direction:column;counter-reset:step;}
.step{display:grid;grid-template-columns:44px 1fr;gap:18px;padding:20px 0;border-top:1px solid var(--line);}
.step:first-child{border-top:none;padding-top:0;}
.step .n{counter-increment:step;font:500 15px var(--mono);color:var(--accent);line-height:1.5;}
.step .n::before{content:counter(step,decimal-leading-zero);}
.step h3{font-size:18px;margin:0 0 6px;color:var(--ink);}
.step p{margin:0;font-size:15px;color:var(--muted);max-width:66ch;line-height:1.6;}

/* ---- Experience ---- */
#experience .job{position:relative;padding:0 0 32px 26px;border-left:1px solid var(--line);margin-left:5px;}
#experience .job:last-child{padding-bottom:0;}
#experience .job::before{
  content:"";position:absolute;left:-6px;top:7px;width:11px;height:11px;border-radius:50%;
  background:var(--bg);border:2px solid var(--accent);
}
#experience .job:first-child::before{background:var(--accent);}
.job-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:4px;}
.job-head h3{font-size:17px;margin:0;color:var(--ink);font-family:var(--sans);font-weight:600;}
.job-head .dates{font:400 12.5px var(--mono);color:var(--muted);white-space:nowrap;}
.job .company{font-size:13.5px;color:var(--accent);font-weight:600;margin:0 0 12px;}
.job ul{margin:0;padding-left:18px;color:var(--muted);font-size:15px;line-height:1.6;}
.job li{margin-bottom:5px;}

/* ---- Personal project ---- */
.project{
  display:grid;grid-template-columns:96px minmax(0,1fr);gap:24px;padding:24px;background:var(--surface);
  border:1px solid var(--line);border-radius:8px;transition:box-shadow .2s,transform .2s var(--ease);
}
.project:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
.project img{width:96px;height:96px;border-radius:21px;display:block;}
.project h3{font-size:22px;margin:0 0 6px;}
.project p{margin:0 0 14px;color:var(--muted);max-width:62ch;font-size:15px;}

/* ---- Skills ---- */
.pill-group{margin-bottom:26px;}
.pill-group:last-child{margin-bottom:0;}
.pill-group h3{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 12px;font-family:var(--sans);font-weight:600;}
.pills{display:flex;flex-wrap:wrap;gap:8px;}
.pill{font-size:13px;padding:7px 13px;border-radius:20px;background:var(--surface);border:1px solid var(--line);color:var(--ink);transition:border-color .18s;}
.pill:hover{border-color:var(--accent);}

/* ---- Credentials ---- */
.creds{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;}
.cred{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px 18px;transition:transform .2s var(--ease),box-shadow .2s;}
.cred:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.cred .badge{display:inline-block;font:600 11px var(--mono);letter-spacing:.04em;color:var(--primary-ink);background:var(--primary);padding:3px 9px;border-radius:3px;margin-bottom:10px;}
.cred h3{font-size:14.5px;margin:0 0 4px;color:var(--ink);font-family:var(--sans);font-weight:600;}
.cred p{font-size:13px;color:var(--muted);margin:0;}

/* ---- Contact / footer ---- */
.contact p{font-size:16px;color:var(--muted);max-width:56ch;margin:0 0 24px;}
footer{padding:28px 0 48px;border-top:1px solid var(--line);}
footer .container{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);}

/* ---- Narrower screens ---- */
@media (max-width:980px){
  #menuBtn{display:inline-flex;}
  .nav-links{
    display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;gap:0;padding:8px 16px 12px;
    background:var(--bg);border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:11px 8px;font-size:15px;}
  .nav-links a::after{display:none;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:36px;}
}
@media (max-width:760px){
  section{padding:56px 0;}
  .container,.nav-inner{padding-left:16px;padding-right:16px;}
  .result-row{grid-template-columns:repeat(2,minmax(0,1fr));}
  .result{padding:18px 14px;border-left:0;border-top:1px solid var(--line);}
  .result:nth-child(-n+2){border-top:0;}
  .result:nth-child(odd){padding-left:0;border-right:1px solid var(--line);}
  .hero{padding:44px 0 40px;}
  .project{grid-template-columns:minmax(0,1fr);gap:14px;padding:18px;}
  .project img{width:72px;height:72px;border-radius:16px;}
  /* The item name takes its own line, so all three subs stay on screen */
  .bid,.bid thead,.bid tbody,.bid tfoot{display:block;}
  .bid tr{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));}
  .bid thead th:first-child{display:none;}
  .bid th,.bid td{padding:9px 6px;}
  .bid td:first-child{grid-column:1/-1;padding:10px 14px 2px;border-bottom:0;}
  .bid th:nth-child(2),.bid td:nth-child(2){padding-left:14px;}
  .bid th:last-child,.bid td:last-child{padding-right:14px;}
  .bid td.num{font-size:12px;}
  .bid{font-size:14px;}
  .result b{font-size:24px;}
  .strip{padding:14px 14px 6px;}
  .verdict{padding:14px;font-size:15px;}
  .bid-foot{padding:12px 14px;}
}
@media (max-width:420px){
  .layers{grid-template-columns:minmax(0,1fr);}
  .layer{display:flex;justify-content:space-between;align-items:baseline;gap:10px;}
  .layer b{margin-top:0;}
  .cta .btn{flex:1 1 auto;justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;}
}
@media print{
  header.nav,.sheet,.demo,.cta{display:none!important;}
  .hero{background:none;color:#000;}
  .hero h1,.hero .role,.hero .role b{color:#000;}
}