/* ==========================================================================
   ABOUT US LAB — SHARED SHELL
   Tokens, header and footer lifted verbatim from /doctor/index.html so every
   version inherits the homepage's exact colour system, type scale, spacing
   rhythm and header/footer behaviour. Nothing below is version-specific.
   ========================================================================== */

:root{
  color-scheme: light;

  --space-1: 4px;   --space-2: 8px;   --space-3: 12px;  --space-4: 16px;
  --space-5: 24px;  --space-6: 32px;  --space-7: 48px;  --space-8: 64px;

  --paper:  #FFFFFF;
  --ink:    #0B0D12;
  --ink-2:  #3A414C;
  --ink-3:  #767E8B;
  --ink-4:  #A7AEB9;
  --line:   #E3E6EB;
  --line-2: #EFF1F4;
  --gridline: rgba(11,13,18,.028);

  --g-blue-b:   #4285F4;
  --g-red-b:    #EA4335;
  --g-yellow-b: #FBBC04;
  --g-green-b:  #34A853;

  --g-blue:   #1A73E8;
  --g-red:    #D93025;
  --g-yellow: #E37400;
  --g-green:  #188038;

  --accent: var(--g-blue);
  --brand: #0B57F5;
  --navy:  #0F1B3D;

  --ground: #F4F7FC;
  --line-b: #DEE5F1;

  --sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --pad:  clamp(18px, 4vw, 72px);
  --barh: 66px;

  --maxw: clamp(1280px, 80vw, 1920px);
  --grid-edge: max(var(--pad), calc((100% - var(--maxw)) / 2));
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); -webkit-font-smoothing: antialiased;
  padding-top: var(--barh);
}
/* the UA sheet loses to author `display`, so [hidden] is restated here */
[hidden]{ display: none !important; }
a{ color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible{ outline: 2px solid var(--accent); outline-offset: 3px; }
button, input{ font: inherit; }
img{ max-width: 100%; }
.visually-hidden{
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- fixed header ---------- */
.bar{
  position: fixed; inset: 0 0 auto; z-index: 60; flex: none;
  display: flex; align-items: center; gap: clamp(14px, 2.2vw, 34px);
  padding: 13px var(--grid-edge); border-bottom: 1px solid var(--line-2);
  background: var(--paper);
}
.wm{ display: flex; align-items: center; font-size: 16px; font-weight: 800;
  letter-spacing: -.035em; white-space: nowrap; color: var(--navy);
  flex: 0 1 auto; min-width: 0; overflow: hidden; }
.mark{ flex: none; display: block; width: 36px; height: 36px; margin-right: 11px; }
.mark svg{ display: block; width: 100%; height: 100%; }
.nav{ margin-left: auto; display: flex; gap: clamp(14px, 2vw, 30px);
  font-size: 13.5px; font-weight: 500; color: var(--ink-2); }
.nav a{ position: relative; padding: 3px 0; transition: color .18s ease; }
.nav a::after{
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1.5px; background: var(--accent); transition: right .24s ease;
}
.nav a:hover{ color: var(--ink); }
.nav a:hover::after{ right: 0; }
.nav a.active{ color: var(--ink); }
.nav a.active::after{ right: 0; }

.baract{ display:flex; align-items:center; gap:10px; margin-left: clamp(14px,2.2vw,34px); flex: none; }
.barbtn{ display:inline-flex; align-items:center; height:36px; padding:0 15px; border-radius:8px;
  background:var(--g-blue); color:#fff; font-size:13px; font-weight:650; white-space:nowrap;
  transition: background .18s ease; }
.barbtn:hover{ background:#1663CE; }
.barmenu{ display:none; width:36px; height:36px; align-items:center; justify-content:center;
  border:1px solid var(--line); border-radius:9px; background:var(--paper);
  color:var(--ink-2); cursor:pointer; transition: border-color .16s ease, color .16s ease; }
.barmenu svg{ width:17px; height:17px; stroke:currentColor; fill:none; stroke-width:1.8;
  stroke-linecap:round; }
.barmenu:hover{ border-color:var(--ink-4); color:var(--ink); }

@media (max-width: 900px){
  .barmenu{ display:flex; }
  .nav{ display:none; position:absolute; top:100%; left:0; right:0; z-index:59;
    flex-direction:column; gap:0; margin:0; padding:4px var(--pad) 14px;
    background:var(--paper); border-bottom:1px solid var(--line);
    box-shadow: 0 18px 30px -24px rgba(11,13,18,.5); }
  .nav[data-open="true"]{ display:flex; }
  .nav a{ padding:12px 0; font-size:15.5px; color:var(--ink);
    border-bottom:1px solid var(--line-2); }
  .nav a:last-child{ border-bottom:0; }
  .nav a::after{ display:none; }
  .nav a.active{ color: var(--accent); }
}
@media (max-width: 430px){
  .bar{ padding: 12px 14px; gap:10px; }
  .wm{ font-size:14.5px; }
  .mark{ width:31px; height:31px; margin-right:9px; }
  .baract{ gap:8px; margin-left:8px; }
  .barbtn{ height:34px; padding:0 12px; font-size:12.5px; }
  .barmenu{ width:34px; height:34px; }
}
@media (max-width: 400px){
  .bar{ padding: 12px 12px; gap: 8px; }
  .wm{ font-size: 13.5px; }
  .mark{ width: 28px; height: 28px; margin-right: 8px; }
  .baract{ gap: 6px; margin-left: 6px; }
  .barbtn{ height: 33px; padding: 0 11px; font-size: 12px; }
  .barmenu{ width: 33px; height: 33px; }
}
@media (min-width: 1281px){
  .bar{ padding: 16px clamp(28px, 3.6vw, 58px); }
  .wm{ font-size: 17.5px; }
  .mark{ width: 40px; height: 40px; margin-right: 12px; }
  .nav{ font-size: 14.5px; gap: clamp(16px, 2vw, 32px); }
  .barbtn{ height: 42px; padding: 0 21px; font-size: 14px; }
}

/* ---------- site footer ---------- */
#sfoot{
  font-family: var(--sans);
  background: var(--ground); border-top: 1px solid var(--line-b);
  padding: clamp(46px,4.6vw,72px) 0 clamp(24px,2.4vw,32px);
}
#sfoot *{ box-sizing: border-box; }
#sfoot a{ color: inherit; text-decoration: none; }
#sfoot p, #sfoot h3{ margin: 0; }
#sfoot :focus-visible{ outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }
#sfoot .f-wrap{ width: min(var(--maxw), 100% - (2 * var(--pad))); margin-inline: auto; }
#sfoot .f-cols{
  display: grid; grid-template-columns: minmax(0,1.5fr) repeat(3, minmax(0,1fr));
  gap: clamp(28px,3.4vw,58px);
}
#sfoot .f-id{ display: flex; align-items: center; gap: 12px; }
#sfoot .f-id .f-mk{ flex: none; display: block; width: 38px; height: 38px; }
#sfoot .f-id .f-mk svg{ display: block; width: 100%; height: 100%; }
#sfoot .f-id b{ font-size: 16.5px; font-weight: 800; letter-spacing: -.038em; color: var(--navy); }
#sfoot .f-lede{ margin-top: 16px; max-width: 34ch; font-size: 14.5px; line-height: 1.6; color: var(--ink-2); }
#sfoot .f-badge{
  margin-top: 18px; display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border: 1px solid #CFE0FD; border-radius: 999px; background: var(--paper);
  color: var(--accent); font-size: 11px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase;
}
#sfoot .f-badge svg{ width: 14px; height: 14px; flex: none; fill: none; stroke: currentColor;
  stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
#sfoot h3{
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .2em;
  text-transform: uppercase; color: var(--ink-4); font-weight: 500;
}
#sfoot ul{ margin: 16px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 11px; }
#sfoot ul a{ font-size: 14px; font-weight: 550; color: var(--ink-2); transition: color .18s ease; }
#sfoot ul a:hover{ color: var(--accent); }
#sfoot .f-ct{ margin: 16px 0 0; display: flex; flex-direction: column; gap: 14px; }
#sfoot .f-ci{ display: flex; gap: 10px; }
#sfoot .f-ci svg{ width: 16px; height: 16px; flex: none; margin-top: 2px; color: var(--accent);
  fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
#sfoot .f-ci span{ font-size: 14px; line-height: 1.5; color: var(--ink-2); }
#sfoot .f-ci a{ font-weight: 650; color: var(--ink); transition: color .18s ease; }
#sfoot .f-ci a:hover{ color: var(--accent); }
#sfoot .f-base{
  margin-top: clamp(34px,3.4vw,52px); padding-top: clamp(16px,1.6vw,21px);
  border-top: 1px solid var(--line-b);
  display: flex; align-items: center; gap: 12px 24px; flex-wrap: wrap;
}
#sfoot .f-base p{ font-size: 12.5px; color: var(--ink-3); }
#sfoot .f-lg{ display: flex; gap: 20px; }
#sfoot .f-lg a{ font-size: 12.5px; color: var(--ink-3); transition: color .18s ease; }
#sfoot .f-lg a:hover{ color: var(--ink); }
#sfoot .f-soc{ margin-left: auto; display: flex; gap: 7px; }
#sfoot .f-soc a{
  width: 34px; height: 34px; display: grid; place-items: center; border-radius: 9px;
  background: var(--paper); border: 1px solid var(--line-b); color: var(--ink-3);
  transition: color .18s ease, border-color .18s ease;
}
#sfoot .f-soc a svg{ width: 16px; height: 16px; fill: currentColor; }
#sfoot .f-soc a:hover{ color: var(--accent); border-color: #CFE0FD; }
@media (max-width: 980px){
  #sfoot .f-cols{ grid-template-columns: repeat(2, minmax(0,1fr)); gap: 34px; }
  #sfoot .f-cols > :first-child{ grid-column: 1 / -1; }
}
@media (max-width: 760px){
  #sfoot{ padding: 40px 0 24px; }
  #sfoot .f-wrap{ width: calc(100% - 36px); }
  #sfoot .f-cols{ grid-template-columns: minmax(0,1fr); gap: 30px; }
  #sfoot .f-lede{ max-width: none; }
  #sfoot .f-base{ flex-direction: column; align-items: flex-start; gap: 16px; }
  #sfoot .f-soc{ margin-left: 0; }
}

/* ---------- lab ribbon, preview only ---------- */
.labtag{
  position: fixed; z-index: 70; right: 14px; bottom: 14px;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 8px 8px 15px; border-radius: 999px;
  background: rgba(11,13,18,.9); color: #fff; backdrop-filter: blur(8px);
  font-family: var(--mono); font-size: 11px; letter-spacing: .05em;
  box-shadow: 0 12px 30px -12px rgba(11,13,18,.6);
}
.labtag a{ display:inline-flex; align-items:center; padding: 5px 11px; border-radius: 999px;
  background: rgba(255,255,255,.14); font-weight: 600; letter-spacing: .04em; }
.labtag a:hover{ background: rgba(255,255,255,.26); }
@media print{ .labtag{ display:none; } }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ transition: none !important; animation: none !important; }
}