/* Option 3 — Lab report: a lung function printout. Fixed side panel, graph-paper grid,
   mono only where something is measured (axes, fees, labels). */
:root{
  --trace:var(--navy); --pred:var(--taupe); --grid-minor:#f1f2f5; --grid-major:#e2e5ea;
  --bg:#fff; --ink:#1D2F4E; --muted:#5a6475; --line:#dcdfe5; --band:#f4f5f7;
  --accent:var(--navy); --link:var(--navy);
  --display:"Cormorant Garamond",Georgia,serif; --body:"Atkinson Hyperlegible","Segoe UI",Verdana,sans-serif;
  --mono:"Red Hat Mono",ui-monospace,monospace;
  --radius:2px; --side:300px;
}
h1,h2,h3{font-weight:700;color:var(--navy)}
h1{font-size:clamp(2.4rem,4.6vw,3.8rem)}
h2{font-size:clamp(1.9rem,3.2vw,2.6rem)}
::selection{background:var(--navy);color:#fff}

/* Side panel */
.site-header{background:#fff;border-bottom:1px solid var(--line)}
.logo svg{height:52px}
.cta{font-weight:600}
.cta:hover{background:#082654}
.btn-ghost{color:var(--navy);border-color:var(--navy)}
.btn-ghost:hover{background:var(--navy);color:#fff}
@media(min-width:1001px){
  body{padding-left:var(--side)}
  .site-header{position:fixed;left:0;top:0;bottom:0;width:var(--side);border-bottom:0;border-right:1px solid var(--line);
    display:flex;flex-direction:column;overflow-y:auto;z-index:30}
  .bar{flex-direction:column;align-items:stretch;gap:18px;padding:28px 28px 8px;margin:0}
  .logo svg{height:auto;width:100%}
  .bar-right{margin:0;flex-direction:column;align-items:stretch;gap:10px}
  .bar-phone{font-family:var(--mono);font-weight:500;font-size:1.05rem}
  .bar-cta{justify-content:center}
  .bar-search{justify-content:center;border-color:var(--line);font-weight:500}
  .bar-search:hover,.bar-search[aria-expanded="true"]{border-color:var(--trace);color:var(--trace)}
  .search-panel{position:fixed;left:var(--side);right:0;top:0;z-index:40;border-top:0;border-bottom:1px solid var(--line)}
  nav.main{padding:8px 28px}
  nav.main a{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:.98rem}
  nav.main a::before{content:"";width:8px;height:8px;border:1px solid var(--pred);flex:none}
  nav.main a:hover::before{border-color:var(--trace)}
  nav.main a[aria-current="page"]{font-weight:650}
  nav.main a[aria-current="page"]::before{background:var(--trace);border-color:var(--trace)}
  .side-contact{display:block;margin-top:auto;padding:18px 28px 26px;font-family:var(--mono);font-size:.8rem;
    line-height:1.55;color:var(--muted);border-top:1px solid var(--line)}
  .side-contact p{margin:0 0 .7em}
  .side-contact a{color:var(--ink);text-decoration:none}
}
@media(max-width:1000px){
  .site-header{position:sticky;top:0;z-index:30}
  .bar-phone,.bar-cta{display:none}
  .bar-search{border-color:var(--line)}
  .menu-btn{display:inline-block;color:var(--navy)}
  nav.main{display:none;padding:0 var(--gutter) 14px}
  nav.main.open{display:block}
  nav.main a{display:block;padding:12px 0;border-bottom:1px solid var(--line)}
  nav.main a[aria-current="page"]{color:var(--trace);font-weight:650}
}

/* Hero: the flow-volume loop */
.hero{padding:72px 0 64px;border-bottom:1px solid var(--line)}
.hero{background-color:#fcfdfe;
  background-image:linear-gradient(var(--grid-major) 1px,transparent 1px),linear-gradient(90deg,var(--grid-major) 1px,transparent 1px),
    linear-gradient(var(--grid-minor) 1px,transparent 1px),linear-gradient(90deg,var(--grid-minor) 1px,transparent 1px);
  background-size:40px 40px,40px 40px,8px 8px,8px 8px}
.hero-grid{grid-template-columns:1fr 1.05fr;gap:48px}
.creds{font-family:var(--mono);font-size:.95rem;color:var(--ink)}
.loop{background:#fff;border:1px solid var(--line);padding:18px 18px 14px;box-shadow:0 12px 30px rgba(20,32,44,.08)}
.loop-svg{display:block;width:100%;height:auto}
.loop .axis path{stroke:var(--ink);stroke-width:1.2;fill:none}
.loop .lbl text,.loop text.lbl{font-family:var(--mono);font-size:13px;fill:var(--muted)}
.loop .pred{fill:none;stroke:var(--pred);stroke-width:1.6;stroke-dasharray:6 6}
.loop .trace{fill:none;stroke:var(--trace);stroke-width:3.4;stroke-linejoin:round;stroke-dasharray:1;stroke-dashoffset:1;
  animation:trace 2.8s cubic-bezier(.33,0,.2,1) .35s forwards}
.loop .pef{fill:var(--trace);opacity:0;animation:fade .5s ease-out 1.1s forwards}
.loop text.pef-l{fill:var(--trace);font-weight:500;opacity:0;animation:fade .5s ease-out 1.2s forwards}
.loop figcaption{font-size:.86rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 16px;margin-top:6px}
.key{font-family:var(--mono);font-size:.8rem;display:inline-flex;align-items:center;gap:8px}
.key i{display:inline-block;width:22px;height:0;border-top:3px solid var(--trace)}
.key i.k-pred{border-top:2px dashed var(--pred);margin-left:10px}
@keyframes trace{to{stroke-dashoffset:0}}
@keyframes fade{to{opacity:1}}

/* Reason for visit, set as a report table */
.starts-band{padding:56px 0 64px;border-bottom:1px solid var(--line)}
.starts h2{font-size:1.5rem}
.starts ul{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;border-top:2px solid var(--ink)}
.starts a{border-bottom:1px solid var(--line);padding:13px 2px;font-weight:500}
.starts a:hover{color:var(--trace)}
.starts .arr{color:var(--trace)}

section.band{background:var(--band);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.page-head{border-bottom:1px solid var(--line);background-color:#fcfdfe;
  background-image:linear-gradient(var(--grid-major) 1px,transparent 1px),linear-gradient(90deg,var(--grid-major) 1px,transparent 1px),
    linear-gradient(var(--grid-minor) 1px,transparent 1px),linear-gradient(90deg,var(--grid-minor) 1px,transparent 1px);
  background-size:40px 40px,40px 40px,8px 8px,8px 8px}
.jump a{font-family:var(--mono);font-size:.82rem;border-radius:var(--radius);border-color:var(--line);background:#fff}
.jump a:hover{border-color:var(--trace);color:var(--trace)}
.exp{border-top:2px solid var(--ink);padding-top:28px}
.exp article h3{font-size:1.25rem}
figure img{border:1px solid var(--line)}
.book img{border:0}
.callout{background:var(--band);border-color:var(--line);border-radius:var(--radius)}
dl.contact dt,table.fees thead th{font-family:var(--mono);font-weight:500;letter-spacing:.06em}
table.fees{border-top:2px solid var(--ink)}
table.fees caption{font-size:1.6rem}
table.fees td.fee{font-family:var(--mono);font-weight:500;text-align:right}
table.fees thead th:nth-child(2){text-align:right}
ul.clean li{border-bottom-color:var(--line)}

.site-footer{border-top:1px solid var(--line);background:#fff;font-size:.95rem}
.site-footer .mark{color:var(--navy)}
.site-footer .small{font-family:var(--mono);font-size:.78rem;color:var(--muted)}

@media(max-width:760px){
  .hero{padding:40px 0 44px}
  .starts ul{grid-template-columns:1fr}
}
@media(max-width:760px){.hero-grid{grid-template-columns:1fr}}
@media(max-width:480px){.bar-search span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}}
nav.main a.ext{color:var(--muted)}
@media(min-width:1001px){nav.main a.ext{display:flex;gap:10px}}

/* Tests: description + booking on the left, "How it's done" alongside */
.test-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;align-items:start}
.test-grid .prose{max-width:68ch}
.how{position:sticky;top:28px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 30px rgba(20,32,44,.07)}
.how figure img{border:0;width:100%;aspect-ratio:4/3;object-fit:cover}
.how figcaption{margin:0;padding:8px 18px 0;font-size:.74rem;line-height:1.45;color:var(--muted)}
.how figcaption a{color:inherit}
.how h3{margin:18px 18px 10px;font-size:1.3rem}
.steps{list-style:none;margin:0;padding:0 18px;counter-reset:step}
.steps li{counter-increment:step;display:grid;grid-template-columns:30px 1fr;gap:10px;padding:10px 0;
  border-top:1px solid var(--line);font-size:.95rem;line-height:1.55}
.steps li::before{content:counter(step);font-family:var(--mono);font-weight:500;color:var(--navy);
  width:26px;height:26px;border:1px solid var(--trace);display:grid;place-items:center;font-size:.8rem;margin-top:1px}
.facts{margin:6px 18px 0;border-top:2px solid var(--ink)}
.facts div{padding:10px 0;border-bottom:1px solid var(--line)}
.facts div:last-child{border-bottom:0}
.facts dt{font-family:var(--mono);font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.facts dd{margin:2px 0 0;font-size:.95rem;line-height:1.5}
.test-cta{margin-top:28px;padding-top:20px;border-top:2px solid var(--ink)}
.test-cta .price{margin:0;color:var(--muted)}
.test-cta .price strong{font-family:var(--mono);font-weight:500;font-size:1.5rem;color:var(--ink);margin-right:6px}
.test-cta .actions{margin-top:14px}
@media(max-width:1180px){
  .test-grid{grid-template-columns:1fr;gap:36px}
  .how{position:static;max-width:560px}
}

/* Brand alignment with the main site */
.page-head{background:var(--navy);color:#fff;background-image:none}
.page-head h1{color:#fff}
.page-head p{color:#dfe3ea}
.page-head .jump a{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.page-head .jump a:hover{border-color:#fff;color:#fff}
.site-footer{background:var(--navy);color:#dfe3ea;border-top:0;padding:48px 0 44px}
.site-footer .wrap{display:block}
.site-footer a{color:#dfe3ea}
.f-brand{font-family:var(--display);font-weight:700;font-size:1.8rem;color:#fff;margin:0 0 20px}
.f-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px 40px;padding-bottom:24px;
  border-bottom:1px solid rgba(255,255,255,.2)}
.f-grid p{margin:0;line-height:1.7}
.f-small{margin:20px 0 0;font-size:.85rem;color:var(--taupe)}
.f-small a{color:var(--taupe)}
.venue{height:auto;padding:0}
.venue img{position:static;width:100%;height:clamp(240px,28vw,380px);object-fit:cover;object-position:50% 62%}
.venue-bar{background:var(--navy);color:#fff}
.venue-bar-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 32px;
  padding-top:22px;padding-bottom:22px}
.venue-bar p{margin:0;color:#dfe3ea}
.venue-bar strong{font-family:var(--display);font-size:1.5rem;font-weight:700;color:#fff}
.venue-bar .btn-ghost{color:#fff;border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.08)}
.venue-bar .btn-ghost:hover{background:#fff;color:var(--navy)}
.starts-band{background:var(--band)}
@media(max-width:760px){.f-grid{grid-template-columns:1fr}.venue-bar-in{display:block}.venue-bar .btn-ghost{margin-top:14px}}

/* Fixes from Dr Dakin's review, Oct 2026 */
.bar-phone a{color:inherit;text-decoration:none}
.bar-phone a+a{margin-left:14px}
/* Return link to Guildford Respiratory, directly under the lab logo */
.back-logo{display:block;margin-top:14px;text-decoration:none;color:var(--muted)}
.back-logo svg{width:100%;height:auto;opacity:.92}
.back-logo span{display:block;margin-top:6px;font-size:.85rem;color:var(--muted)}
.back-logo:hover span{color:var(--navy)}
.back-logo:hover svg{opacity:1}
@media(max-width:1000px){.back-logo{display:none}}
table.fees thead th{color:var(--navy);font-weight:700}