/* HNZ Radiology Tools architecture pack.
   Follows docs/hnz-design-system.md: navy structure, primary blue for links,
   teal accent, Poppins for headings, Public Sans for body. Light only, because
   the pack is read on screen and printed, and the brand palette is light. */

@font-face { font-family: 'Poppins'; font-weight: 500; font-display: swap; src: url('fonts/Poppins-Medium.woff2') format('woff2'); }
@font-face { font-family: 'Poppins'; font-weight: 600; font-display: swap; src: url('fonts/Poppins-SemiBold.woff2') format('woff2'); }
@font-face { font-family: 'Poppins'; font-weight: 700; font-display: swap; src: url('fonts/Poppins-Bold.woff2') format('woff2'); }
@font-face { font-family: 'Public Sans'; font-weight: 400; font-display: swap; src: url('fonts/PublicSans-Regular.woff2') format('woff2'); }
@font-face { font-family: 'Public Sans'; font-weight: 400; font-style: italic; font-display: swap; src: url('fonts/PublicSans-Italic.woff2') format('woff2'); }
@font-face { font-family: 'Public Sans'; font-weight: 500; font-display: swap; src: url('fonts/PublicSans-Medium.woff2') format('woff2'); }
@font-face { font-family: 'Public Sans'; font-weight: 600; font-display: swap; src: url('fonts/PublicSans-SemiBold.woff2') format('woff2'); }
@font-face { font-family: 'Public Sans'; font-weight: 700; font-display: swap; src: url('fonts/PublicSans-Bold.woff2') format('woff2'); }

:root {
  --primary-110: #043c60;
  --primary-100: #00558c;
  --primary-75: #4080a9;
  --primary-25: #bfd4e2;
  --primary-5: #f2f7f9;
  --navy-110: #041836;
  --navy-100: #13294b;
  --navy-75: #4e5e78;
  --navy-50: #8994a5;
  --navy-25: #c4c9d2;
  --navy-5: #f3f4f6;
  --sidebar: #0e2240;
  --teal-110: #0c818f;
  --teal-100: #2dccd3;
  --teal-25: #caf2f4;
  --teal-5: #ecfafb;
  --page: #f9fafb;
  --card: #ffffff;
  --line: #e2e6ec;
  --ok-bg: #dcfce7; --ok-fg: #166534;
  --warn-bg: #fef3c7; --warn-fg: #92400e;
  --bad-bg: #fecaca; --bad-fg: #991b1b;
  --info-bg: #e0f2fe; --info-fg: #00558c;
  --font-display: 'Poppins', -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Public Sans', -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--page);
  color: var(--navy-75);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* App shell: sticky topbar, fixed sidebar, scrolling content */
.topbar {
  position: sticky; top: 0; z-index: 20;
  height: 64px;
  display: flex; align-items: center; gap: 16px;
  padding: 0 20px;
  background: var(--navy-100);
  color: #fff;
}
.topbar img { height: 22px; display: block; }
.topbar .divider { width: 1px; height: 28px; background: rgba(255,255,255,0.25); }
.topbar .title { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; letter-spacing: 0.01em; }
.topbar .title span { color: var(--teal-100); font-weight: 500; }
.topbar .menu {
  display: none; margin-left: auto;
  background: transparent; color: #fff;
  border: 1px solid rgba(255,255,255,0.3); border-radius: 6px;
  font: 600 13px var(--font-display); padding: 6px 12px; cursor: pointer;
}

.shell { display: flex; min-height: calc(100vh - 64px); }
.sidebar {
  position: sticky; top: 64px; align-self: flex-start;
  width: 264px; flex: 0 0 264px;
  height: calc(100vh - 64px); overflow-y: auto;
  background: var(--sidebar);
  color: var(--navy-25);
  padding: 20px 0 28px;
}
.sidebar .group {
  margin: 18px 20px 6px;
  font: 700 0.7rem var(--font-display);
  letter-spacing: 0.08em; text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}
.sidebar .group:first-child { margin-top: 0; }
.sidebar a {
  display: flex; gap: 10px; align-items: baseline;
  margin: 1px 10px; padding: 7px 12px;
  border-radius: 8px;
  color: var(--navy-25); text-decoration: none;
  font-size: 13.5px; font-weight: 500;
}
.sidebar a .n { color: rgba(255,255,255,0.35); font-size: 12px; font-variant-numeric: tabular-nums; min-width: 16px; }
.sidebar a:hover { background: rgba(255,255,255,0.07); color: #fff; }
.sidebar a[aria-current="page"] { background: rgba(45,204,211,0.14); color: #fff; }
.sidebar a[aria-current="page"] .n { color: var(--teal-100); }
.sidebar .foot { margin: 28px 22px 0; font-size: 12px; line-height: 1.5; color: rgba(255,255,255,0.45); }

main { flex: 1; min-width: 0; padding: 40px 48px 80px; }
.page { max-width: 1100px; margin: 0 auto; }

/* Page header */
.eyebrow { font: 700 0.72rem var(--font-display); letter-spacing: 0.08em; text-transform: uppercase; color: var(--teal-110); margin: 0 0 6px; }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--navy-100); line-height: 1.25; }
h1 { font-size: 2rem; font-weight: 700; color: var(--primary-100); margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.35rem; font-weight: 600; margin: 48px 0 12px; padding-top: 8px; border-top: 1px solid var(--line); }
h2:first-of-type { border-top: 0; }
h3 { font-size: 1.05rem; font-weight: 600; margin: 28px 0 8px; }
h4 { font-size: 0.95rem; font-weight: 600; margin: 20px 0 6px; }
.lede { font-size: 1.08rem; line-height: 1.65; color: var(--navy-100); max-width: 760px; margin: 0 0 8px; }
p, ul, ol { max-width: 780px; }
p { margin: 0 0 14px; }
ul, ol { padding-left: 22px; margin: 0 0 14px; }
li { margin: 4px 0; }
a { color: var(--primary-100); text-underline-offset: 2px; }
a:hover { color: var(--primary-110); }
strong { color: var(--navy-100); font-weight: 600; }
code { font-family: var(--font-mono); font-size: 0.86em; background: var(--navy-5); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; color: var(--navy-100); word-break: break-word; }
hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }

/* Key figures */
.figures { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 24px 0 8px; }
.figures div { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.figures b { display: block; font: 700 1.5rem var(--font-display); color: var(--primary-100); line-height: 1.2; }
.figures span { font-size: 13px; color: var(--navy-75); }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; margin: 18px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; }
.card h3, .card h4 { margin-top: 0; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
a.card { text-decoration: none; color: inherit; display: block; transition: border-color .15s, box-shadow .15s; }
a.card:hover { border-color: var(--primary-25); box-shadow: 0 2px 10px rgba(19,41,75,0.07); }
a.card h3 { color: var(--primary-100); }

/* Callouts */
.callout { border-radius: 10px; padding: 14px 18px; margin: 18px 0; border: 1px solid; max-width: 820px; }
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }
.callout .t { font: 600 0.9rem var(--font-display); margin-bottom: 4px; display: block; }
.callout.info { background: var(--primary-5); border-color: var(--primary-25); }
.callout.info .t { color: var(--primary-100); }
.callout.teal { background: var(--teal-5); border-color: var(--teal-25); }
.callout.teal .t { color: var(--teal-110); }
.callout.warn { background: #fffbeb; border-color: #fde68a; }
.callout.warn .t { color: var(--warn-fg); }
.callout.bad { background: #fef2f2; border-color: #fecaca; }
.callout.bad .t { color: var(--bad-fg); }

/* Badges */
.b { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 12px; font-weight: 600; line-height: 1.5; white-space: nowrap; vertical-align: 1px; }
.b.ok { background: var(--ok-bg); color: var(--ok-fg); }
.b.warn { background: var(--warn-bg); color: var(--warn-fg); }
.b.bad { background: var(--bad-bg); color: var(--bad-fg); }
.b.info { background: var(--info-bg); color: var(--info-fg); }
.b.muted { background: var(--navy-5); color: var(--navy-75); }
.b.crit { background: #7f1d1d; color: #fff; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 16px 0 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; vertical-align: top; padding: 9px 12px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; color: var(--navy-100); background: var(--navy-5); font-size: 13px; }
tr:last-child td { border-bottom: 0; }
td code { font-size: 0.82em; white-space: nowrap; word-break: normal; }
table.compact td, table.compact th { padding: 7px 10px; }

/* Figures and diagrams */
figure { margin: 22px 0 26px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 14px 14px; }
figure svg { display: block; width: 100%; height: auto; max-width: 100%; color: var(--navy-100); }
figcaption { margin-top: 12px; font-size: 13px; color: var(--navy-75); line-height: 1.5; max-width: 820px; }
figcaption b { color: var(--navy-100); }

/* Diagram vocabulary, shared by every inline SVG */
svg text { font-family: var(--font-body); font-size: 12px; fill: currentColor; }
svg .t-title { font-family: var(--font-display); font-weight: 600; font-size: 13px; }
svg .t-small { font-size: 10.5px; fill: var(--navy-75); }
svg .t-label { font-size: 10.5px; fill: var(--navy-75); }
svg .t-zone { font-family: var(--font-display); font-weight: 700; font-size: 10.5px; letter-spacing: 0.08em; fill: var(--navy-50); }
svg .t-white { fill: #fff; }
svg .t-accent { fill: var(--teal-110); }
svg .t-bad { fill: var(--bad-fg); }
svg .box { fill: #fff; stroke: var(--navy-100); stroke-width: 1.3; }
svg .box-soft { fill: var(--navy-5); stroke: var(--navy-25); stroke-width: 1; }
svg .box-blue { fill: var(--primary-5); stroke: var(--primary-75); stroke-width: 1.3; }
svg .box-hub { fill: var(--teal-5); stroke: var(--teal-110); stroke-width: 2; }
svg .box-dark { fill: var(--navy-100); stroke: var(--navy-100); }
svg .box-store { fill: #fff; stroke: var(--primary-75); stroke-width: 1.2; }
svg .box-ext { fill: #fff; stroke: var(--navy-50); stroke-width: 1.2; stroke-dasharray: 4 3; }
svg .box-bad { fill: #fef2f2; stroke: var(--bad-fg); stroke-width: 1.3; }
svg .zone { fill: none; stroke: var(--navy-25); stroke-width: 1.2; stroke-dasharray: 5 4; }
svg .zone-cf { fill: #fbfcfd; stroke: #f38020; stroke-width: 1.4; stroke-dasharray: 6 4; }
svg .edge { fill: none; stroke: var(--navy-75); stroke-width: 1.3; }
svg .edge-accent { fill: none; stroke: var(--teal-110); stroke-width: 1.8; }
svg .edge-dash { fill: none; stroke: var(--navy-50); stroke-width: 1.2; stroke-dasharray: 4 3; }
svg .edge-bad { fill: none; stroke: var(--bad-fg); stroke-width: 1.5; stroke-dasharray: 4 3; }
svg .life { stroke: var(--navy-25); stroke-width: 1; stroke-dasharray: 3 3; }
svg .num { fill: var(--navy-100); }
svg .num-accent { fill: var(--teal-110); }
svg .ah { fill: var(--navy-75); }
svg .ah-accent { fill: var(--teal-110); }
svg .ah-bad { fill: var(--bad-fg); }
svg .ah-dash { fill: var(--navy-50); }

/* Two-column prose + aside */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* Definition lists used for "at a glance" blocks */
dl.facts { display: grid; grid-template-columns: 170px 1fr; gap: 6px 16px; margin: 12px 0 18px; font-size: 14px; max-width: 820px; }
dl.facts dt { font-weight: 600; color: var(--navy-100); }
dl.facts dd { margin: 0; }

/* Previous / next */
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--line); }
.pager a { display: block; max-width: 48%; padding: 12px 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); text-decoration: none; }
.pager a small { display: block; font-size: 12px; color: var(--navy-50); }
.pager a span { font: 600 14px var(--font-display); color: var(--primary-100); }
.pager a.next { margin-left: auto; text-align: right; }

.muted { color: var(--navy-50); }
.small { font-size: 13px; }
.nowrap { white-space: nowrap; }

@media (max-width: 900px) {
  .topbar .menu { display: block; }
  .topbar .title { font-size: 0.92rem; }
  .sidebar { position: fixed; left: 0; top: 64px; z-index: 15; transform: translateX(-100%); transition: transform .2s; box-shadow: 4px 0 20px rgba(0,0,0,0.2); }
  body.nav-open .sidebar { transform: none; }
  main { padding: 28px 16px 64px; }
  h1 { font-size: 1.6rem; }
  .split { grid-template-columns: 1fr; }
  dl.facts { grid-template-columns: 1fr; gap: 2px; }
  dl.facts dd { margin-bottom: 8px; }
  figure { padding: 12px; overflow-x: auto; }
  /* Diagrams and wide tables scroll sideways rather than shrink past legibility */
  figure svg { min-width: 720px; }
  .table-wrap table { min-width: 620px; }
  .table-wrap table.compact { min-width: 520px; }
}
@media (max-width: 560px) {
  .topbar .divider, .topbar .title span { display: none; }
}

@media print {
  .topbar, .sidebar, .pager { display: none; }
  main { padding: 0; }
  body { background: #fff; font-size: 11pt; }
  figure, .card, .table-wrap, .callout { break-inside: avoid; }
  h2 { break-after: avoid; }
}