/* ==========================================================================
   Lab & Diagnostic Tests — ADHD-friendly study guide
   ========================================================================== */

:root{
  --ink:#12203a;
  --ink-soft:#40506b;
  --muted:#6b7a94;
  --line:#dfe6f0;
  --bg:#f4f7fb;
  --card:#ffffff;

  --blue:#1668d8;   --blue-bg:#e8f1fe;
  --green:#0f8a4d;  --green-bg:#e5f7ec;
  --red:#d92c3c;    --red-bg:#fdeaec;
  --amber:#b56a00;  --amber-bg:#fff3dc;
  --purple:#7b3fd4; --purple-bg:#f2eafd;
  --teal:#0a8f9c;   --teal-bg:#e2f6f8;
  --pink:#d1197f;   --pink-bg:#fdeaf4;
  --slate:#5a6b86;  --slate-bg:#eef2f7;
  --brown:#8a5a2b;  --brown-bg:#f7efe4;

  --radius:14px;
  --shadow:0 1px 2px rgba(18,32,58,.06), 0 6px 18px rgba(18,32,58,.07);
  --shadow-lg:0 10px 34px rgba(18,32,58,.14);
  --font:"Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:96px}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:var(--font); font-size:17px; line-height:1.62;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
/* ---------- site background: the lab-motif artwork ----------
   Fixed, tiled-to-cover, then veiled so body text stays high-contrast.
   The art reads clearly in the page margins; the reading column sits on
   an opaque sheet so nothing competes with the words. */
body::before{
  content:""; position:fixed; inset:0; z-index:-2; pointer-events:none;
  background:url("../img/hero-art.jpg") center center / cover no-repeat;
}
body::after{
  content:""; position:fixed; inset:0; z-index:-1; pointer-events:none;
  background:linear-gradient(180deg, rgba(240,244,250,.89), rgba(244,247,251,.94));
}
body.art-bold::after{
  background:linear-gradient(180deg, rgba(238,243,250,.52), rgba(244,247,251,.66));
}
/* in bold-art mode the chrome needs its own backing so text never sits on the art */
body.art-bold .page-head,
body.art-bold .sidebar{
  background:rgba(255,255,255,.90);
  border-radius:16px;
  padding:18px 20px;
  box-shadow:var(--shadow);
}
body.art-bold .page-head{margin-top:18px}
body.art-bold .head-art{top:16px; right:18px}
body.art-bold .section-label{
  color:#22334d; background:rgba(255,255,255,.86); border-radius:999px;
  padding:5px 14px; align-self:flex-start;
}
body.art-bold .section-label::after{background:rgba(255,255,255,.7)}
body.art-off::before{display:none}
body.art-off::after{background:var(--bg)}

/* the reading column gets an opaque sheet so the art never fights the text */
.layout > main, .wrap > .prose, .wrap > .grid{position:relative}
body.wide-off{}
img{max-width:100%; display:block}
a{color:var(--blue); text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- Reading comfort toggles ---------- */
body.dyslexic{ font-family:Verdana, Tahoma, sans-serif; letter-spacing:.3px; word-spacing:2px; }
body.big-text{ font-size:19.5px; }
body.calm .infobox, body.calm .sec-body{ }
body.focus .test-card:not(.is-open){ opacity:.45; filter:saturate(.5); }

/* ==========================================================================
   HEADER / NAV
   ========================================================================== */
.topbar{
  position:sticky; top:0; z-index:60;
  background:rgba(255,255,255,.93); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1240px; margin:0 auto; padding:10px 20px;
  display:flex; align-items:center; gap:14px; flex-wrap:wrap;
}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; font-size:18px; color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .logo{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,#1668d8,#7b3fd4); color:#fff; font-size:19px;
  box-shadow:0 4px 12px rgba(22,104,216,.35);
}
.brand small{display:block;font-weight:600;font-size:13px;color:var(--muted);letter-spacing:.6px;text-transform:uppercase}

.nav{display:flex; gap:4px; flex-wrap:wrap; margin-left:auto}
.nav a{
  padding:7px 12px; border-radius:999px; font-size:14px; font-weight:650; color:var(--ink-soft);
}
.nav a:hover{background:var(--blue-bg); color:var(--blue); text-decoration:none}
.nav a.active{background:var(--ink); color:#fff}

.tools{display:flex; gap:6px; align-items:center}
.tool-btn{
  border:1px solid var(--line); background:#fff; color:var(--ink-soft);
  border-radius:999px; padding:6px 12px; font-size:13px; font-weight:700; cursor:pointer;
  font-family:var(--font); white-space:nowrap;
}
.tool-btn:hover{border-color:var(--blue); color:var(--blue)}
.tool-btn.on{background:var(--ink); color:#fff; border-color:var(--ink)}

@media (max-width:760px){
  .topbar-inner{padding:8px 12px; gap:8px}
  .brand{font-size:16px}
  .nav{
    margin-left:0; order:3; width:100%; flex-wrap:nowrap; overflow-x:auto;
    -webkit-overflow-scrolling:touch; scrollbar-width:none; padding-bottom:2px;
  }
  .nav::-webkit-scrollbar{display:none}
  .nav a{white-space:nowrap; font-size:13.5px; padding:6px 11px}
  .tools{margin-left:auto}
  .tool-btn{padding:5px 10px; font-size:13px}
  .hero{padding:30px 22px; border-radius:16px}
  .prose{padding:20px 18px}
  .test-head{padding:15px 14px; gap:10px}
  .test-title h3{font-size:17.5px}
  .test-body{padding:0 14px 18px}
  .sec-body{padding:12px 13px 14px}
}

/* progress bar */
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:99;
  background:linear-gradient(90deg,#1668d8,#7b3fd4,#d1197f);transition:width .1s linear}

/* ==========================================================================
   LAYOUT
   ========================================================================== */
.wrap{max-width:1240px; margin:0 auto; padding:0 20px}
.layout{display:grid; grid-template-columns:262px minmax(0,1fr); gap:34px; align-items:start; padding:28px 0 80px}
@media (max-width:1000px){ .layout{grid-template-columns:1fr; gap:18px} }

.sidebar{position:sticky; top:88px; max-height:calc(100vh - 110px); overflow:auto; padding-right:6px}
@media (max-width:1000px){
  .sidebar{position:static; max-height:none; border:1px solid var(--line); background:#fff;
    border-radius:var(--radius); padding:14px}
}
.sidebar h4{
  font-size:13px; letter-spacing:1.1px; text-transform:uppercase; color:var(--muted);
  margin:0 0 10px; font-weight:800;
}
.sidebar ol{list-style:none; margin:0; padding:0; counter-reset:toc}
.sidebar li{margin:0 0 2px}
.sidebar li a{
  display:block; padding:6px 10px 6px 12px; border-radius:8px; font-size:13.5px;
  color:var(--ink-soft); border-left:3px solid transparent; line-height:1.35; font-weight:600;
}
.sidebar li a:hover{background:#fff; color:var(--blue); text-decoration:none}
.sidebar li a.active{background:#fff; color:var(--blue); border-left-color:var(--blue); box-shadow:var(--shadow)}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  border-radius:22px; padding:46px 40px; margin:26px 0 30px; color:#fff; position:relative; overflow:hidden;
  background:#0a0f22;
  box-shadow:var(--shadow-lg);
  isolation:isolate;
}
/* lab-motif artwork, anchored right, fading into the gradient */
.hero::before{
  content:""; position:absolute; inset:0; z-index:-2;
  background:url("../img/hero-art.jpg") right center / cover no-repeat;
}
.hero::after{
  content:""; position:absolute; inset:0; z-index:-1;
  background:
    linear-gradient(100deg,
      rgba(8,14,34,.97) 0%,
      rgba(10,20,52,.93) 34%,
      rgba(16,30,72,.72) 56%,
      rgba(20,16,60,.42) 78%,
      rgba(20,16,60,.22) 100%);
}
.hero h1{text-shadow:0 2px 18px rgba(0,0,0,.45)}
.hero p{text-shadow:0 1px 10px rgba(0,0,0,.45)}
@media (max-width:760px){
  .hero::after{
    background:linear-gradient(180deg,rgba(8,14,34,.90) 0%,rgba(10,20,52,.94) 55%,rgba(20,16,60,.90) 100%);
  }
}

/* small decorative strip reused on chapter pages */
.page-head{position:relative}
.head-art{
  position:absolute; right:0; top:22px; width:118px; height:118px; border-radius:18px;
  background:url("../img/hero-art-sm.jpg") center/cover; box-shadow:var(--shadow);
  border:3px solid #fff; opacity:.95;
}
@media (max-width:820px){ .head-art{display:none} }
.hero h1{margin:0 0 12px; font-size:clamp(30px,5vw,50px); line-height:1.08; letter-spacing:-.6px}
.hero p{margin:0; font-size:18px; max-width:64ch; color:rgba(255,255,255,.93)}
.hero .kicker{
  display:inline-block; background:rgba(255,255,255,.18); border:1px solid rgba(255,255,255,.3);
  padding:5px 13px; border-radius:999px; font-size:13px; font-weight:800; letter-spacing:1px;
  text-transform:uppercase; margin-bottom:16px;
}
.hero-stats{display:flex; gap:12px; flex-wrap:wrap; margin-top:26px; position:relative}
.hero-stat{background:rgba(255,255,255,.14); border:1px solid rgba(255,255,255,.24); border-radius:12px; padding:10px 16px}
.hero-stat b{display:block; font-size:26px; line-height:1.1}
.hero-stat span{font-size:13px; text-transform:uppercase; letter-spacing:.8px; opacity:.85}

/* page header (chapter pages) */
.page-head{padding:30px 0 6px}
.page-head .eyebrow{font-size:13px; font-weight:800; letter-spacing:1.4px; text-transform:uppercase; color:var(--muted)}
.page-head h1{margin:6px 0 10px; font-size:clamp(26px,4vw,40px); line-height:1.12; letter-spacing:-.4px}
.page-head p.lede{font-size:18px; color:var(--ink-soft); max-width:70ch; margin:0}

/* ==========================================================================
   CARDS / GRID
   ========================================================================== */
.grid{display:grid; gap:18px}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(275px,1fr))}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}

.chcard{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:22px; box-shadow:var(--shadow); display:block; color:inherit;
  border-top:5px solid var(--c,var(--blue)); transition:transform .14s ease, box-shadow .14s ease;
}
.chcard:hover{transform:translateY(-3px); box-shadow:var(--shadow-lg); text-decoration:none}
.chcard .ico{font-size:30px; line-height:1}
.chcard h3{margin:12px 0 6px; font-size:19px; letter-spacing:-.2px}
.chcard p{margin:0 0 14px; color:var(--ink-soft); font-size:14.5px; line-height:1.5}
.chcard .count{
  display:inline-block; background:var(--cbg,var(--blue-bg)); color:var(--c,var(--blue));
  font-weight:800; font-size:13px; padding:4px 11px; border-radius:999px;
}

/* ==========================================================================
   TEST CARD (accordion)
   ========================================================================== */
.test-card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  margin:0 0 16px; box-shadow:var(--shadow); overflow:hidden; scroll-margin-top:96px;
  transition:box-shadow .15s ease;
}
.test-card.is-open{box-shadow:var(--shadow-lg); border-color:#c9d8ee}

.test-head{
  display:flex; gap:14px; align-items:flex-start; width:100%; text-align:left;
  padding:18px 20px; background:none; border:0; cursor:pointer; font-family:var(--font);
  border-left:6px solid var(--c,var(--blue));
}
.test-head:hover{background:#fafcff}
.test-num{
  flex:0 0 auto; width:38px; height:38px; border-radius:11px; display:grid; place-items:center;
  background:var(--cbg,var(--blue-bg)); color:var(--c,var(--blue)); font-weight:900; font-size:15px;
}
.test-title{flex:1 1 auto; min-width:0}
.test-title h3{margin:0; font-size:19.5px; line-height:1.28; letter-spacing:-.2px; color:var(--ink)}
.test-title .aka{
  display:block; margin-top:4px; font-size:13px; color:var(--muted); font-style:italic; line-height:1.4;
}
.chev{flex:0 0 auto; color:var(--muted); font-size:14px; transition:transform .2s ease; margin-top:8px}
.is-open .chev{transform:rotate(180deg)}

.test-body{display:none; padding:0 20px 22px 20px}
.is-open .test-body{display:block}

/* quick-glance strip */
.glance{
  display:grid; gap:10px; grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  margin:2px 0 20px;
}
.glance-item{
  border-radius:12px; padding:12px 14px; border:1px solid transparent; font-size:14.5px; line-height:1.5;
}
.glance-item b{
  display:block; font-size:13px; letter-spacing:1px; text-transform:uppercase; margin-bottom:4px; font-weight:900;
}
.g-normal{background:var(--green-bg); border-color:#bfe8cf; color:#0b5c34}
.g-normal b{color:var(--green)}
.g-why{background:var(--blue-bg); border-color:#c6dcfb; color:#123c72}
.g-why b{color:var(--blue)}
.g-danger{background:var(--red-bg); border-color:#f8c8ce; color:#8d1721}
.g-danger b{color:var(--red)}

/* ==========================================================================
   SECTIONS INSIDE A TEST
   ========================================================================== */
.sec{margin:0 0 6px; border-radius:12px; overflow:hidden; border:1px solid var(--line)}
.sec + .sec{margin-top:10px}
.sec-head{
  display:flex; align-items:center; gap:9px; width:100%; text-align:left;
  padding:10px 14px; border:0; cursor:pointer; font-family:var(--font);
  font-weight:800; font-size:14.5px; letter-spacing:.1px;
  background:var(--sbg,var(--slate-bg)); color:var(--sc,var(--slate));
}
.sec-head .sico{font-size:16px}
.sec-head .mini-chev{margin-left:auto; font-size:13px; opacity:.7; transition:transform .18s}
.sec.open .mini-chev{transform:rotate(180deg)}
.sec-body{display:none; padding:14px 16px 16px; background:#fff; border-top:1px solid var(--line)}
.sec.open .sec-body{display:block}
.sec-body > *:first-child{margin-top:0}
.sec-body > *:last-child{margin-bottom:0}
.sec-body p{margin:0 0 12px; max-width:78ch}
.sec-body ul{margin:0 0 12px; padding-left:0; list-style:none}
.sec-body li{
  position:relative; padding-left:26px; margin-bottom:9px; max-width:78ch;
}
.sec-body li::before{
  content:"▸"; position:absolute; left:6px; top:-1px; color:var(--sc,var(--slate)); font-weight:900;
}
.sec-body h5{
  margin:18px 0 8px; font-size:15px; color:var(--ink); letter-spacing:-.1px;
  padding-bottom:5px; border-bottom:2px solid var(--line);
}
.sec-body h5:first-child{margin-top:0}

/* phase pills for Before / During / After */
.phase{
  display:inline-flex; align-items:center; gap:6px; font-weight:900; font-size:13px;
  letter-spacing:1px; text-transform:uppercase; padding:4px 12px; border-radius:999px;
  margin:16px 0 10px;
}
.phase-before{background:#e8f1fe; color:#1668d8}
.phase-during{background:#fff3dc; color:#b56a00}
.phase-after{background:#e5f7ec; color:#0f8a4d}

/* ==========================================================================
   EMPHASIS + CALLOUTS
   ========================================================================== */
mark.val{
  background:#fff2a8; color:#5a4400; padding:1px 5px; border-radius:5px;
  font-weight:800; font-variant-numeric:tabular-nums; box-decoration-break:clone;
}
mark.danger{
  background:var(--red-bg); color:#a2101c; padding:1px 5px; border-radius:5px;
  font-weight:900; text-transform:uppercase; letter-spacing:.4px; font-size:.92em;
}
mark.safe{background:var(--green-bg); color:#0b5c34; padding:1px 5px; border-radius:5px; font-weight:800}
.term{font-weight:800; color:var(--ink); border-bottom:2px solid #cfe0f8}
em.soft{color:var(--ink-soft)}

.callout{
  border-radius:12px; padding:14px 16px 14px 46px; margin:14px 0; position:relative;
  font-size:15px; line-height:1.55; border:1px solid transparent;
}
.callout::before{position:absolute; left:14px; top:13px; font-size:19px; line-height:1}
.callout b.lead{display:block; font-size:13px; letter-spacing:1px; text-transform:uppercase; margin-bottom:3px}

.c-critical{background:var(--red-bg); border-color:#f7c4ca; color:#8d1721}
.c-critical::before{content:"🚨"}
.c-critical b.lead{color:var(--red)}
.c-tip{background:var(--amber-bg); border-color:#f2ddb0; color:#6d4300}
.c-tip::before{content:"💡"}
.c-tip b.lead{color:var(--amber)}
.c-key{background:var(--purple-bg); border-color:#ddc9fa; color:#4c2088}
.c-key::before{content:"🔑"}
.c-key b.lead{color:var(--purple)}
.c-picture{background:#eef2f7; border-color:#d7e0ec; color:#3a4a63}
.c-picture::before{content:"🖼️"}
.c-picture b.lead{color:var(--slate)}
.c-nurse{background:var(--teal-bg); border-color:#b9e6ea; color:#08606a}
.c-nurse::before{content:"🩺"}
.c-nurse b.lead{color:var(--teal)}

/* ==========================================================================
   TABLES
   ========================================================================== */
.tbl-wrap{overflow-x:auto; margin:16px 0; border:1px solid var(--line); border-radius:12px; background:#fff}
table{border-collapse:collapse; width:100%; font-size:14.5px; min-width:440px}
th{
  background:#eef3fa; color:var(--ink); text-align:left; padding:10px 13px; font-weight:800;
  border-bottom:2px solid #d6e2f2; font-size:13px; letter-spacing:.3px; position:sticky; top:0;
}
td{padding:10px 13px; border-bottom:1px solid #eef2f7; vertical-align:top; line-height:1.5}
tr:last-child td{border-bottom:0}
tbody tr:nth-child(even){background:#fafcff}

/* ==========================================================================
   FIGURES
   ========================================================================== */
figure{
  margin:20px 0; background:#fff; border:1px solid var(--line); border-radius:14px;
  overflow:hidden; box-shadow:var(--shadow);
}
figure img{
  width:100%; height:auto; max-height:560px; object-fit:contain; object-position:top center;
  cursor:zoom-in; background:#fbfcfe; padding:8px;
}
figcaption{
  padding:11px 15px; font-size:13.5px; color:var(--ink-soft); border-top:1px solid var(--line);
  background:#fafcff; line-height:1.5;
}
figcaption b{color:var(--ink)}
figcaption::after{
  content:"🔍 click the image to view it full size";
  display:block; margin-top:6px; font-size:13px; font-weight:700; letter-spacing:.4px;
  text-transform:uppercase; color:var(--muted);
}
.fig-tag{
  display:inline-block; font-size:13px; font-weight:900; letter-spacing:1px; text-transform:uppercase;
  background:var(--purple-bg); color:var(--purple); padding:2px 8px; border-radius:999px; margin-right:8px;
}

/* lightbox */
.lightbox{
  position:fixed; inset:0; background:rgba(8,15,28,.92); z-index:200; display:none;
  align-items:center; justify-content:center; padding:24px; cursor:zoom-out;
}
.lightbox.on{display:flex}
.lightbox img{max-width:96vw; max-height:92vh; width:auto; border-radius:8px; box-shadow:0 20px 60px rgba(0,0,0,.6)}

/* ==========================================================================
   SEARCH
   ========================================================================== */
.searchbar{
  display:flex; align-items:center; gap:10px; background:#fff; border:2px solid var(--line);
  border-radius:12px; padding:11px 15px; margin:22px 0 18px; box-shadow:var(--shadow);
}
.searchbar:focus-within{border-color:var(--blue); box-shadow:0 0 0 4px rgba(22,104,216,.12)}
.searchbar input{
  border:0; outline:0; flex:1; font-size:16px; font-family:var(--font); color:var(--ink); background:none;
}
.searchbar .sicon{font-size:18px; color:var(--muted)}
.search-count{font-size:13px; color:var(--muted); font-weight:700; white-space:nowrap}

.bulk{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:20px}

/* ==========================================================================
   OVERVIEW / PROSE BLOCKS (chapter intros, Ch.1)
   ========================================================================== */
.prose{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:26px 28px;
  box-shadow:var(--shadow); margin:0 0 20px}
.prose h2{
  margin:34px 0 12px; font-size:24px; letter-spacing:-.3px; padding-bottom:8px;
  border-bottom:3px solid var(--blue-bg); scroll-margin-top:96px;
}
.prose h2:first-child{margin-top:0}
.prose h3{margin:24px 0 8px; font-size:18px; color:var(--ink); scroll-margin-top:96px}
.prose h4{margin:18px 0 6px; font-size:15.5px; color:var(--blue)}
.prose p{margin:0 0 13px; max-width:78ch}
.prose ul{margin:0 0 14px; padding-left:0; list-style:none}
.prose li{position:relative; padding-left:26px; margin-bottom:8px; max-width:78ch}
.prose li::before{content:"▸"; position:absolute; left:6px; color:var(--blue); font-weight:900}

/* ==========================================================================
   LAB REFERENCE PAGE
   ========================================================================== */
.ref-grid{display:grid; gap:20px; grid-template-columns:repeat(auto-fill,minmax(330px,1fr)); margin:22px 0}
.ref-card{background:#fff; border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;
  box-shadow:var(--shadow); border-top:5px solid var(--c,var(--blue))}
.ref-card .rc-head{padding:14px 18px}
.ref-card h3{margin:0; font-size:17px}
.ref-card p{margin:4px 0 0; font-size:14px; color:var(--ink-soft)}
.ref-card img{
  border-top:1px solid var(--line); cursor:zoom-in; width:100%;
  max-height:520px; object-fit:contain; object-position:top center; background:#fbfcfe; padding:6px;
}
.ref-card .rc-head::after{
  content:"🔍 tap to enlarge"; display:block; margin-top:7px; font-size:13px; font-weight:800;
  letter-spacing:.5px; text-transform:uppercase; color:var(--muted);
}

.valuetable td:first-child{font-weight:800}

/* ==========================================================================
   MISC
   ========================================================================== */
.section-label{
  display:flex; align-items:center; gap:10px; margin:38px 0 16px; font-size:13px; font-weight:900;
  letter-spacing:1.4px; text-transform:uppercase; color:var(--muted);
}
.section-label::after{content:""; flex:1; height:2px; background:var(--line); border-radius:2px}

.pill-row{display:flex; gap:8px; flex-wrap:wrap; margin:16px 0}
.pill{
  background:#fff; border:1px solid var(--line); border-radius:999px; padding:6px 13px;
  font-size:13px; font-weight:700; color:var(--ink-soft);
}
.pill.c{background:var(--cbg); color:var(--c); border-color:transparent}

.footer{border-top:1px solid var(--line); margin-top:50px; padding:26px 0 60px; color:var(--muted); font-size:13.5px}
.footer a{color:var(--ink-soft)}

.backtop{
  position:fixed; right:22px; bottom:22px; z-index:50; width:46px; height:46px; border-radius:50%;
  background:var(--ink); color:#fff; border:0; cursor:pointer; font-size:18px; display:none;
  box-shadow:var(--shadow-lg);
}
.backtop.on{display:block}

.hidden{display:none !important}

@media print{
  .topbar,.sidebar,.tools,.backtop,.searchbar,.bulk{display:none!important}
  .test-body{display:block!important}
  .sec-body{display:block!important}
  .layout{grid-template-columns:1fr}
}

/* ==========================================================================
   JEWEL THEME — translucent jewel-toned glass over the lab-motif artwork
   Applied via  body.jewel  (the default).  The "Plain" button removes the
   class and restores the light theme above.
   ========================================================================== */
body.jewel{
  --ink:#f2f6ff;
  --ink-soft:#cfd9ef;
  --muted:#9fb0d0;
  --line:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.10);
  --shadow:0 2px 6px rgba(0,0,0,.28), 0 10px 30px rgba(0,0,0,.34);
  --shadow-lg:0 18px 54px rgba(0,0,0,.52);
  color:var(--ink);
  background:#070b1a;
}

/* ---- background: let the art through, only a light haze for contrast ---- */
body.jewel::after{
  background:
    radial-gradient(130% 100% at 50% 0%, rgba(6,10,26,.14) 0%, rgba(6,10,26,.34) 58%, rgba(4,7,20,.50) 100%);
}
body.jewel.art-bold::after{
  background:radial-gradient(130% 100% at 50% 0%, rgba(6,10,26,0) 0%, rgba(6,10,26,.12) 58%, rgba(4,7,20,.26) 100%);
}
body.jewel.art-bold .page-head,
body.jewel.art-bold .sidebar{background:rgba(10,16,36,.55); box-shadow:var(--shadow)}
body.jewel.art-bold .section-label{background:rgba(10,16,36,.6); color:var(--ink-soft)}
body.jewel.art-bold .section-label::after{background:rgba(255,255,255,.22)}

/* ---- top bar ---- */
body.jewel .topbar{
  background:rgba(9,14,32,.62);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.14);
}
body.jewel .brand{color:#fff}
body.jewel .brand small{color:var(--muted)}
body.jewel .nav a{color:var(--ink-soft)}
body.jewel .nav a:hover{background:rgba(255,255,255,.14); color:#fff}
body.jewel .nav a.active{background:rgba(255,255,255,.94); color:#0b1128}
body.jewel .tool-btn{
  background:rgba(255,255,255,.10); border-color:rgba(255,255,255,.22); color:var(--ink-soft);
  backdrop-filter:blur(8px);
}
body.jewel .tool-btn:hover{background:rgba(255,255,255,.20); color:#fff; border-color:rgba(255,255,255,.4)}
body.jewel .tool-btn.on{background:rgba(255,255,255,.94); color:#0b1128; border-color:transparent}

/* ---- headings / prose chrome ---- */
body.jewel .page-head h1,
body.jewel .hero h1{color:#fff; text-shadow:0 2px 20px rgba(0,0,0,.55)}
body.jewel .page-head .eyebrow,
body.jewel .section-label{color:#a8bbdd}
body.jewel .page-head p.lede{color:#dbe4f8; text-shadow:0 1px 10px rgba(0,0,0,.5)}
body.jewel .section-label::after{background:rgba(255,255,255,.18)}
body.jewel .head-art{border-color:rgba(255,255,255,.55)}

/* ---- sidebar ---- */
body.jewel .sidebar h4{color:#9fb0d0}
body.jewel .sidebar li a{color:#cbd7f0; text-shadow:0 1px 8px rgba(0,0,0,.5)}
body.jewel .sidebar li a:hover{background:rgba(255,255,255,.14); color:#fff}
body.jewel .sidebar li a.active{
  background:rgba(255,255,255,.18); color:#fff; border-left-color:#fff; box-shadow:none;
}

/* ==========================================================================
   THE GLASS CARDS
   Each card is tinted with its chapter's jewel colour at ~55% and blurred,
   so roughly 45% of the artwork reads through while text stays crisp.
   ========================================================================== */
body.jewel .test-card,
body.jewel .prose,
body.jewel .chcard,
body.jewel .ref-card,
body.jewel .searchbar,
body.jewel figure,
body.jewel .tbl-wrap{
  background-color:rgba(12,19,44,.44);
  background-image:linear-gradient(150deg, var(--jewel, rgba(30,58,120,.42)), rgba(10,16,38,.34));
  backdrop-filter:blur(22px) saturate(155%);
  -webkit-backdrop-filter:blur(22px) saturate(155%);
  border:1px solid rgba(255,255,255,.18);
  box-shadow:var(--shadow);
  color:var(--ink);
}
body.jewel .test-card.is-open{
  border-color:rgba(255,255,255,.34);
  box-shadow:var(--shadow-lg);
}
body.jewel .test-head:hover{background:rgba(255,255,255,.07)}
body.jewel .test-title h3{color:#fff; text-shadow:0 1px 10px rgba(0,0,0,.5)}
body.jewel .test-title .aka{color:#b9c8e6}
body.jewel .chev{color:#c3d0ea}
body.jewel .test-num{
  background:rgba(255,255,255,.20); color:#fff; border:1px solid rgba(255,255,255,.28);
  text-shadow:0 1px 6px rgba(0,0,0,.5);
}

/* per-chapter jewel tints (set alongside --c on each card) */
body.jewel [style*="--c:#1668d8"]{--jewel:rgba(24,74,190,.46)}   /* sapphire   */
body.jewel [style*="--c:#7b3fd4"]{--jewel:rgba(104,44,190,.46)}  /* amethyst   */
body.jewel [style*="--c:#0a8f9c"]{--jewel:rgba(10,120,132,.46)}  /* aquamarine */
body.jewel [style*="--c:#b56a00"]{--jewel:rgba(150,88,10,.46)}   /* topaz      */
body.jewel [style*="--c:#d1197f"]{--jewel:rgba(178,20,108,.46)}  /* ruby       */
body.jewel [style*="--c:#0f8a4d"]{--jewel:rgba(14,116,68,.46)}   /* emerald    */
body.jewel [style*="--c:#8a5a2b"]{--jewel:rgba(122,78,38,.46)}   /* bronze     */
body.jewel [style*="--c:#d92c3c"]{--jewel:rgba(176,32,48,.46)}   /* garnet     */

/* the hero keeps the art fully visible behind a jewel wash */
body.jewel .hero::after{
  background:linear-gradient(100deg,
    rgba(10,18,48,.86) 0%, rgba(14,24,62,.70) 34%,
    rgba(40,20,90,.44) 62%, rgba(20,16,60,.18) 100%);
}
body.jewel .hero-stat{
  background:rgba(255,255,255,.14); border-color:rgba(255,255,255,.28);
  backdrop-filter:blur(10px);
}

/* ---- inner sections ---- */
body.jewel .sec{
  border-color:rgba(255,255,255,.16);
  background:rgba(255,255,255,.05);
}
body.jewel .sec-head{
  background:rgba(255,255,255,.12);
  color:#fff;
  text-shadow:0 1px 8px rgba(0,0,0,.55);
  border-bottom:1px solid rgba(255,255,255,.10);
}
body.jewel .sec-head:hover{background:rgba(255,255,255,.19)}
body.jewel .sec-body{
  background:rgba(6,11,28,.42);
  border-top-color:rgba(255,255,255,.12);
  color:#e6ecfb;
}
body.jewel .sec-body h5{color:#fff; border-bottom-color:rgba(255,255,255,.22)}
body.jewel .sec-body li::before{color:#ffffff; opacity:.75}
body.jewel .prose h2{color:#fff; border-bottom-color:rgba(255,255,255,.22)}
body.jewel .prose h3{color:#fff}
body.jewel .prose h4{color:#9ec5ff}
body.jewel .prose li::before{color:#9ec5ff}
body.jewel .prose p, body.jewel .prose li{color:#e6ecfb}

/* ---- quick-glance strip ---- */
body.jewel .glance-item{
  backdrop-filter:blur(8px); border-width:1px;
}
body.jewel .g-normal{background:rgba(14,116,68,.42); border-color:rgba(120,240,180,.42); color:#dcffe9}
body.jewel .g-normal b{color:#8affc0}
body.jewel .g-why{background:rgba(24,74,190,.42); border-color:rgba(140,190,255,.42); color:#e2edff}
body.jewel .g-why b{color:#9ec5ff}
body.jewel .g-danger{background:rgba(176,32,48,.42); border-color:rgba(255,150,160,.42); color:#ffe3e6}
body.jewel .g-danger b{color:#ff9aa6}

/* ---- phase pills ---- */
body.jewel .phase-before{background:rgba(24,74,190,.55); color:#cfe2ff}
body.jewel .phase-during{background:rgba(150,88,10,.55); color:#ffe3b8}
body.jewel .phase-after{background:rgba(14,116,68,.55); color:#c8ffdd}

/* ---- emphasis ---- */
body.jewel mark.val{background:rgba(255,222,90,.92); color:#3a2c00}
body.jewel mark.danger{background:rgba(255,90,110,.92); color:#2c0007}
body.jewel mark.safe{background:rgba(110,240,175,.90); color:#00301a}
body.jewel .term{color:#fff; border-bottom-color:rgba(158,197,255,.75)}
body.jewel em.soft{color:#bcc9e6}
body.jewel kbd{color:#fff}

/* ---- callouts ---- */
body.jewel .callout{backdrop-filter:blur(8px)}
body.jewel .c-critical{background:rgba(176,32,48,.46); border-color:rgba(255,140,152,.45); color:#ffe6e9}
body.jewel .c-critical b.lead{color:#ff9aa6}
body.jewel .c-tip{background:rgba(150,88,10,.46); border-color:rgba(255,206,120,.45); color:#ffeed4}
body.jewel .c-tip b.lead{color:#ffcf7d}
body.jewel .c-key{background:rgba(104,44,190,.46); border-color:rgba(200,160,255,.45); color:#f0e6ff}
body.jewel .c-key b.lead{color:#cfa9ff}
body.jewel .c-picture{background:rgba(30,44,80,.50); border-color:rgba(180,200,235,.35); color:#e3ebfa}
body.jewel .c-picture b.lead{color:#b9cbe8}
body.jewel .c-nurse{background:rgba(10,120,132,.46); border-color:rgba(140,235,245,.45); color:#dcfaff}
body.jewel .c-nurse b.lead{color:#7fe4f0}

/* ---- tables ---- */
body.jewel th{
  background:rgba(255,255,255,.16); color:#fff; border-bottom-color:rgba(255,255,255,.28);
}
body.jewel td{border-bottom-color:rgba(255,255,255,.12); color:#e6ecfb}
body.jewel tbody tr:nth-child(even){background:rgba(255,255,255,.05)}

/* ---- figures: images stay on white so the infographics read correctly ---- */
body.jewel figure img{background:#fff; border-radius:10px}
body.jewel figcaption{
  background:rgba(255,255,255,.08); border-top-color:rgba(255,255,255,.16); color:#dbe4f8;
}
body.jewel figcaption b{color:#fff}
body.jewel figcaption::after{color:#a8bbdd}
body.jewel .fig-tag{background:rgba(255,255,255,.20); color:#fff}
body.jewel .ref-card img{background:#fff}
body.jewel .ref-card h3{color:#fff}
body.jewel .ref-card p{color:#d5dff2}
body.jewel .ref-card .rc-head::after{color:#a8bbdd}

/* ---- home page cards ---- */
body.jewel .chcard h3{color:#fff}
body.jewel .chcard p{color:#d5dff2}
body.jewel .chcard .count{background:rgba(255,255,255,.20); color:#fff}
body.jewel .chcard:hover{border-color:rgba(255,255,255,.4)}

/* ---- search ---- */
body.jewel .searchbar{border:2px solid rgba(255,255,255,.22)}
body.jewel .searchbar:focus-within{border-color:rgba(255,255,255,.6); box-shadow:0 0 0 4px rgba(255,255,255,.12)}
body.jewel .searchbar input{color:#fff}
body.jewel .searchbar input::placeholder{color:#9fb0d0}
body.jewel .search-count{color:#c3d0ea}

/* ---- misc ---- */
body.jewel .pill{background:rgba(255,255,255,.12); border-color:rgba(255,255,255,.22); color:#dbe4f8}
body.jewel .footer{border-top-color:rgba(255,255,255,.16); color:#a8bbdd}
body.jewel .footer a{color:#cbd7f0}
body.jewel .backtop{background:rgba(255,255,255,.92); color:#0b1128}
body.jewel a{color:#9ec5ff}
body.jewel .focus .test-card:not(.is-open){opacity:.35}

/* Safari / older browsers with no backdrop-filter: fall back to solid-ish glass */
@supports not ((backdrop-filter:blur(2px)) or (-webkit-backdrop-filter:blur(2px))){
  body.jewel .test-card, body.jewel .prose, body.jewel .chcard,
  body.jewel .ref-card, body.jewel .searchbar, body.jewel figure, body.jewel .tbl-wrap{
    background-color:rgba(10,16,38,.86);
  }
  body.jewel .topbar{background:rgba(9,14,32,.94)}
}

/* ==========================================================================
   COLLAPSIBLE LEFT RAIL NAVIGATION
   ========================================================================== */
:root{ --rail-w:284px; }

.railnav{
  position:fixed; top:0; left:0; bottom:0; width:var(--rail-w); z-index:80;
  display:flex; flex-direction:column;
  overflow-y:auto; overscroll-behavior:contain;
  transform:translateX(-100%); transition:transform .24s cubic-bezier(.4,0,.2,1);
  background:rgba(255,255,255,.94);
  border-right:1px solid var(--line);
  padding-bottom:16px;
}
body.nav-open .railnav{transform:none}

.rail-head{padding:16px 18px 12px}
.rail-head .brand{font-size:16.5px}
.brand-top{display:none}
body:not(.nav-open) .brand-top{display:flex}

.rail-links{display:flex; flex-direction:column; gap:2px; padding:4px 12px 10px}
.rail-links a{
  display:flex; align-items:center; gap:11px; padding:10px 12px; border-radius:11px;
  font-size:14.5px; font-weight:700; color:var(--ink-soft); line-height:1.25;
  border-left:4px solid transparent;
}
.rail-links a:hover{background:rgba(0,0,0,.05); color:var(--ink); text-decoration:none}
.rail-links a.active{
  background:var(--c,var(--blue)); color:#fff; border-left-color:rgba(255,255,255,.5);
}
.rail-links a.active b{color:#fff}
.rail-links .ni{font-size:17px; width:22px; text-align:center; flex:0 0 auto}
.rail-links a b{font-weight:900; color:var(--muted); margin-right:3px}
.rail-links a em{
  margin-left:auto; font-style:normal; font-size:13px; font-weight:900;
  background:rgba(0,0,0,.08); color:var(--muted); padding:2px 8px; border-radius:999px;
}
.rail-links a.active em{background:rgba(255,255,255,.28); color:#fff}

.rail-sep{
  font-size:13px; letter-spacing:1.2px; text-transform:uppercase; font-weight:900;
  color:var(--muted); padding:14px 20px 8px; border-top:1px solid var(--line); margin-top:6px;
}
.rail-toc{padding:0 12px}
.rail-toc h4{
  font-size:13px; letter-spacing:1.1px; text-transform:uppercase; color:var(--muted);
  margin:12px 8px 6px; font-weight:800;
}
.rail-toc ol{list-style:none; margin:0; padding:0}
.rail-toc li a{
  display:block; padding:6px 10px; border-radius:8px; font-size:13px; line-height:1.35;
  color:var(--ink-soft); border-left:3px solid transparent; font-weight:600;
}
.rail-toc li a:hover{background:rgba(0,0,0,.05); color:var(--ink); text-decoration:none}
.rail-toc li a.active{background:rgba(0,0,0,.06); border-left-color:var(--blue); color:var(--blue)}

.rail-foot{margin-top:auto; padding:14px 16px 4px; border-top:1px solid var(--line)}
.tool-btn.wide{width:100%; text-align:center}

.rail-scrim{
  position:fixed; inset:0; z-index:75; background:rgba(4,8,20,.55);
  opacity:0; transition:opacity .2s; pointer-events:none;
}

/* hamburger */
.navtoggle{
  flex:0 0 auto; width:40px; height:38px; border-radius:11px; cursor:pointer;
  border:1px solid var(--line); background:rgba(255,255,255,.7);
  display:flex; flex-direction:column; justify-content:center; align-items:center; gap:4.5px;
}
.navtoggle span{display:block; width:18px; height:2px; border-radius:2px; background:var(--ink-soft); transition:.2s}
.navtoggle:hover span{background:var(--blue)}
body.nav-open .navtoggle span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
body.nav-open .navtoggle span:nth-child(2){opacity:0}
body.nav-open .navtoggle span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* content shifts over on wide screens, overlays on narrow ones */
.page-shell, .topbar{transition:padding-left .24s cubic-bezier(.4,0,.2,1)}
@media (min-width:1100px){
  body.nav-open .page-shell, body.nav-open .topbar{padding-left:var(--rail-w)}
}
@media (max-width:1099px){
  body.nav-open .rail-scrim{opacity:1; pointer-events:auto}
}

/* the old two-column layout is now single column */
.layout{grid-template-columns:minmax(0,1fr) !important}

/* ---- jewel-theme rail ---- */
body.jewel .railnav{
  background:rgba(8,13,32,.80);
  backdrop-filter:blur(26px) saturate(150%);
  -webkit-backdrop-filter:blur(26px) saturate(150%);
  border-right:1px solid rgba(255,255,255,.16);
}
body.jewel .rail-links a{color:#cbd7f0}
body.jewel .rail-links a:hover{background:rgba(255,255,255,.12); color:#fff}
body.jewel .rail-links a b{color:#8fa4cc}
body.jewel .rail-links a em{background:rgba(255,255,255,.14); color:#c3d0ea}
body.jewel .rail-links a.active{color:#fff; box-shadow:0 4px 18px rgba(0,0,0,.4)}
body.jewel .rail-sep,
body.jewel .rail-toc h4{color:#9fb0d0; border-top-color:rgba(255,255,255,.14)}
body.jewel .rail-toc li a{color:#c3d0ea}
body.jewel .rail-toc li a:hover{background:rgba(255,255,255,.12); color:#fff}
body.jewel .rail-toc li a.active{background:rgba(255,255,255,.16); color:#fff; border-left-color:#fff}
body.jewel .rail-foot{border-top-color:rgba(255,255,255,.14)}
body.jewel .navtoggle{background:rgba(255,255,255,.12); border-color:rgba(255,255,255,.22)}
body.jewel .navtoggle span{background:#dbe4f8}
body.jewel .navtoggle:hover span{background:#fff}

@media (max-width:760px){
  :root{ --rail-w:270px; }
  .rail-head{padding:12px 14px 8px}
}

/* ==========================================================================
   FIND-A-TEST INDEX
   ========================================================================== */
.ix-list{display:grid; gap:8px; grid-template-columns:repeat(auto-fill,minmax(320px,1fr)); margin:6px 0 26px}
a.ix{
  display:flex; align-items:flex-start; gap:11px; padding:11px 13px; border-radius:11px;
  border:1px solid var(--line); background:var(--card); color:inherit;
  border-left:4px solid var(--c,var(--blue)); line-height:1.35; transition:.14s;
}
a.ix:hover{transform:translateX(2px); text-decoration:none; border-color:var(--c,var(--blue))}
.ix-ico{font-size:16px; flex:0 0 auto; margin-top:1px}
.ix-main{flex:1 1 auto; min-width:0}
.ix-main b{display:block; font-size:14.5px; font-weight:750}
.ix-aka{display:block; font-size:13px; color:var(--muted); font-style:italic; margin-top:2px;
  overflow:hidden; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical}
.ix-chap{
  flex:0 0 auto; align-self:center; font-size:13px; font-weight:800; letter-spacing:.4px;
  text-transform:uppercase; color:var(--c,var(--blue)); background:var(--cbg,rgba(0,0,0,.05));
  padding:3px 8px; border-radius:999px; white-space:nowrap;
}
.prose h2 .cnt{
  font-size:13px; font-weight:800; letter-spacing:.6px; text-transform:uppercase;
  color:var(--muted); margin-left:8px; vertical-align:middle;
}
h3.az{
  margin:22px 0 8px; font-size:26px; font-weight:900; color:var(--blue);
  border-bottom:3px solid var(--line); padding-bottom:2px; scroll-margin-top:96px;
}
.azjump{display:flex; flex-wrap:wrap; gap:5px; margin:6px 0 16px}
.azjump a{
  width:34px; height:34px; display:grid; place-items:center; border-radius:9px;
  border:1px solid var(--line); background:var(--card); font-weight:800; font-size:14px;
  color:var(--ink-soft);
}
.azjump a:hover{background:var(--blue); color:#fff; border-color:transparent; text-decoration:none}

/* jewel-theme index */
body.jewel a.ix{
  background:rgba(12,19,44,.44);
  background-image:linear-gradient(150deg, var(--jewel, rgba(30,58,120,.42)), rgba(10,16,38,.30));
  backdrop-filter:blur(16px) saturate(150%);
  border:1px solid rgba(255,255,255,.16);
  border-left:4px solid var(--c,var(--blue));
  color:var(--ink);
}
body.jewel a.ix:hover{border-color:rgba(255,255,255,.45); border-left-color:var(--c)}
body.jewel .ix-main b{color:#fff}
body.jewel .ix-aka{color:#a8bbdd}
body.jewel .ix-chap{background:rgba(255,255,255,.16); color:#e2eaf9}
body.jewel h3.az{color:#fff; border-bottom-color:rgba(255,255,255,.24)}
body.jewel .azjump a{
  background:rgba(255,255,255,.10); border-color:rgba(255,255,255,.20); color:#dbe4f8;
  backdrop-filter:blur(8px);
}
body.jewel .azjump a:hover{background:rgba(255,255,255,.92); color:#0b1128}
body.jewel .prose h2 .cnt{color:#9fb0d0}

/* ════════ collapsible top bar ════════ */
#topCollapse{
  flex:0 0 auto; margin-left:auto; width:38px; height:34px; border-radius:10px; cursor:pointer;
  border:1px solid var(--line); background:rgba(255,255,255,.7);
  display:flex; align-items:center; justify-content:center;
  font-size:15px; line-height:1; color:var(--ink-soft); transition:.18s;
}
#topCollapse:hover{background:var(--blue,#1668d8); color:#fff; border-color:transparent}
#topCollapse .chev{display:block; transition:transform .22s cubic-bezier(.4,0,.2,1)}
body.top-collapsed #topCollapse .chev{transform:rotate(180deg)}
.jewel #topCollapse{background:rgba(255,255,255,.12); border-color:rgba(255,255,255,.22); color:#dbe4f8}
.jewel #topCollapse:hover{background:rgba(255,255,255,.3); color:#fff}

/* the collapsed strip: keep the hamburger + the chevron, drop everything else */
body.top-collapsed .topbar-inner{padding-top:2px; padding-bottom:2px; gap:8px; min-height:0}
body.top-collapsed .topbar .navtoggle{width:30px; height:26px; border-radius:8px; gap:3.5px}
body.top-collapsed .topbar .navtoggle span{width:15px}
body.top-collapsed #topCollapse{width:30px; height:26px; border-radius:8px; font-size:13px}
body.top-collapsed .topbar .brand-top,
body.top-collapsed .topbar .tools{
  display:none !important;
}
body.top-collapsed .topbar .mini-title{
  display:block; font-weight:800; font-size:.9rem; letter-spacing:.2px;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.topbar .mini-title{display:none; color:var(--ink-soft)}
.jewel .topbar .mini-title{color:#e7eeff}
.topbar-inner{transition:padding .2s ease}
@media print{#topCollapse{display:none}}

/* ════════ fluids page: legend, comparison tables, practice Q&A ════════ */
.legend{
  margin:16px 0 4px; padding:14px 16px; border-radius:14px;
  background:rgba(255,255,255,.72); border:1px solid var(--line);
  backdrop-filter:blur(8px); font-size:14.5px;
}
.legend>b{display:block; margin-bottom:8px; font-size:13px; letter-spacing:.4px; text-transform:uppercase; color:var(--muted)}
.legend ul{margin:0; padding-left:0; list-style:none}
.legend li{margin:6px 0; line-height:1.5}
.lg{display:inline-block; padding:2px 9px; border-radius:999px; font-size:13px; font-weight:800; margin-right:8px; white-space:nowrap}
.lg-key{background:#fff3d1; color:#7a5200}
.lg-pic{background:#e6efff; color:#1a4fa0}
.lg-tab{background:#e2f6f8; color:#075e67}
.lg-q{background:#f0e9fb; color:#5227a3}
body.jewel .legend{background:rgba(255,255,255,.12); border-color:rgba(255,255,255,.20); color:#e7eeff}
body.jewel .legend>b{color:#b9c8e6}

.cmp-wrap{margin:18px 0}
table.cmp{
  width:100%; border-collapse:separate; border-spacing:0; margin:10px 0 6px;
  font-size:14.5px; background:rgba(255,255,255,.70); border:1px solid var(--line);
  border-radius:14px; overflow:hidden; backdrop-filter:blur(8px);
}
table.cmp th, table.cmp td{padding:10px 12px; vertical-align:top; text-align:left; border-bottom:1px solid var(--line)}
table.cmp thead th{background:rgba(0,0,0,.05); font-size:13px; letter-spacing:.3px; text-transform:uppercase; color:var(--muted)}
table.cmp thead th.lo{color:#0a6f8f} table.cmp thead th.hi{color:#b03a2e}
table.cmp tbody th[scope=row]{width:15%; font-weight:800; color:var(--ink); background:rgba(0,0,0,.03)}
table.cmp tbody tr:last-child th, table.cmp tbody tr:last-child td{border-bottom:0}
table.cmp ul{margin:0; padding-left:18px}
table.cmp li{margin:3px 0; line-height:1.45}
.cmp-note{font-size:13.5px; color:var(--muted); margin:4px 2px 0}
.sbs{font-size:0.82em; vertical-align:sub}
body.jewel table.cmp{background:rgba(255,255,255,.10); border-color:rgba(255,255,255,.18); color:#eaf0ff}
body.jewel table.cmp th, body.jewel table.cmp td{border-bottom-color:rgba(255,255,255,.14)}
body.jewel table.cmp thead th{background:rgba(255,255,255,.10); color:#c3d2ee}
body.jewel table.cmp thead th.lo{color:#7fe0f2} body.jewel table.cmp thead th.hi{color:#ffa9a0}
body.jewel table.cmp tbody th[scope=row]{background:rgba(255,255,255,.07); color:#fff}
@media (max-width:760px){
  table.cmp, table.cmp tbody, table.cmp tr, table.cmp td, table.cmp th{display:block; width:auto}
  table.cmp thead{display:none}
  table.cmp tbody th[scope=row]{width:auto; border-radius:0; font-size:15px}
  table.cmp.cmp2 tbody td:nth-of-type(1)::before{content:"LOW / deficit"; display:block; font-size:13px; font-weight:800; letter-spacing:.5px; color:#0a6f8f; margin-bottom:2px}
  table.cmp.cmp2 tbody td:nth-of-type(2)::before{content:"HIGH / excess"; display:block; font-size:13px; font-weight:800; letter-spacing:.5px; color:#b03a2e; margin-bottom:2px}
  body.jewel table.cmp.cmp2 tbody td:nth-of-type(1)::before{color:#7fe0f2}
  body.jewel table.cmp.cmp2 tbody td:nth-of-type(2)::before{color:#ffa9a0}
}

li.sub{list-style:none; margin-left:-18px; margin-top:10px; font-size:15px}
li.sub b{color:var(--ink)} body.jewel li.sub b{color:#fff}

.qa-intro{font-size:14.5px; color:var(--muted); margin:2px 0 14px}
.qa{margin:0 0 16px; padding:14px 16px; border-radius:14px;
  background:rgba(255,255,255,.70); border:1px solid var(--line); backdrop-filter:blur(8px)}
.qa-q{display:flex; gap:12px; align-items:flex-start}
.qa-n{flex:0 0 auto; width:28px; height:28px; border-radius:9px; display:grid; place-items:center;
  background:var(--c,#7b3fd4); color:#fff; font-weight:800; font-size:14px}
.qa-stem{margin:2px 0 8px; font-weight:650; line-height:1.5}
.qa-sata{margin:-4px 0 8px; font-size:13px; font-weight:800; letter-spacing:.4px; text-transform:uppercase; color:#b03a2e}
ol.qa-opts{list-style:none; margin:0; padding:0}
ol.qa-opts li{margin:5px 0; line-height:1.45; display:flex; gap:9px}
.opt-l{flex:0 0 auto; width:22px; height:22px; border-radius:7px; display:grid; place-items:center;
  background:rgba(0,0,0,.06); font-size:13px; font-weight:800; color:var(--ink-soft)}
details.qa-a{margin-top:12px}
details.qa-a>summary{
  cursor:pointer; list-style:none; display:inline-block; padding:7px 14px; border-radius:999px;
  background:var(--ink); color:#fff; font-size:13.5px; font-weight:750;
}
details.qa-a>summary::-webkit-details-marker{display:none}
details.qa-a[open]>summary{background:transparent; color:var(--muted); padding-left:0}
details.qa-a[open]>summary::after{content:" \25B2"}
.qa-key{margin:10px 0 8px; padding:9px 12px; border-radius:10px; background:#e6f7ec; color:#0b5c30; font-weight:700}
.qa-why,.qa-tip{margin:8px 0; padding:9px 12px; border-radius:10px; font-size:14.5px; line-height:1.5}
.qa-why{background:rgba(22,104,216,.09); border-left:4px solid #1668d8}
.qa-tip{background:rgba(123,63,212,.09); border-left:4px solid #7b3fd4}
body.jewel .qa{background:rgba(255,255,255,.10); border-color:rgba(255,255,255,.18); color:#eaf0ff}
body.jewel .opt-l{background:rgba(255,255,255,.16); color:#dbe4f8}
body.jewel details.qa-a>summary{background:#fff; color:#0b1128}
body.jewel details.qa-a[open]>summary{background:transparent; color:#a8bbdd}
body.jewel .qa-key{background:rgba(43,200,120,.16); color:#c8ffe0}
body.jewel .qa-why{background:rgba(90,160,255,.14)}
body.jewel .qa-tip{background:rgba(170,120,255,.16)}
@media print{details.qa-a{display:block} details.qa-a>summary{display:none}}

/* ════════ bloodwork page extras ════════ */
.lg-alert{background:#fde8e8; color:#9b1c1c}
.formula{font-size:15px; line-height:1.7}
.formula p{margin:8px 0}
.formula .ex{color:var(--muted); font-size:14px}
body.jewel .formula .ex{color:#a8bbdd}
ul.cols2{columns:2; column-gap:26px; margin:6px 0 0; padding-left:20px}
ul.cols2 li{break-inside:avoid; margin:4px 0}
@media (max-width:700px){ul.cols2{columns:1}}


/* ════════ Drive link on an infographic figure ════════ */
a.fig-drive{
  display:inline-block; margin-top:6px; padding:4px 11px; border-radius:999px;
  background:rgba(16,90,60,.92); color:#fff; font-size:13px; font-weight:800;
  text-decoration:none; border:1px solid rgba(255,255,255,.28); white-space:nowrap;
}
a.fig-drive:hover{background:#12b886; text-decoration:none}
@media print{a.fig-drive{display:none}}

/* ════════════════════════════════════════════════════════════════════════
   CLOSED-CARD READABILITY  (2026-07)
   Problem: collapsed test cards were dimmed to 45% opacity + half
   saturation by Focus mode even when nothing was open, so the whole list
   was hard to read until you clicked something.
   ════════════════════════════════════════════════════════════════════════ */

/* 1 ── Kill the blanket dim. Focus mode now only fades the OTHER cards
        once you actually have one open, and much more gently. */
body.focus .test-card:not(.is-open),
body.jewel .focus .test-card:not(.is-open){ opacity:1; filter:none; }

body.focus:has(.test-card.is-open) .test-card:not(.is-open){
  opacity:.92; filter:none;
}

/* 2 ── Give the closed card a more solid backdrop so the title isn't
        competing with the artwork showing through the glass. */
body.jewel .test-card:not(.is-open){
  background-color:rgba(9,15,36,.74);
  background-image:linear-gradient(150deg, var(--jewel, rgba(30,58,120,.42)), rgba(8,13,32,.62));
  border-color:rgba(255,255,255,.26);
}
body.jewel .test-card:not(.is-open):hover{
  background-color:rgba(9,15,36,.88);
  border-color:rgba(255,255,255,.46);
}

/* 3 ── Louder title: bigger, heavier, whiter, with a real shadow behind it. */
.test-title h3{ font-size:20.5px; font-weight:800; }
body.jewel .test-title h3{
  color:#ffffff;
  text-shadow:0 1px 2px rgba(0,0,0,.85), 0 2px 14px rgba(0,0,0,.55);
}
body.jewel .test-title .aka{ color:#ccd8f2; }
body.jewel .chev{ color:#e4eaf9; font-size:15px; }

/* 4 ── Stronger colour spine and number chip so each row has an edge. */
.test-head{ border-left-width:8px; }
body.jewel .test-num{
  background:rgba(255,255,255,.28);
  border-color:rgba(255,255,255,.44);
}

/* 5 ── Keyboard focus ring (was invisible on the dark theme). */
.test-head:focus-visible{ outline:3px solid #ffd36b; outline-offset:-3px; }

@media (max-width:760px){
  .test-title h3{ font-size:18.5px; }
  .test-head{ border-left-width:7px; }
}


/* accessibility: rem so nested sizes can never compound below readable */
.ix-chap,.ix-aka,.cnt,.tool-btn{font-size:.82rem}