:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #15222b;
  --ink-soft: #4a5b67;
  --line: #dfe5ea;
  --brand: #16384e;
  --brand-ink: #ffffff;
  --accent: #1f6f9c;
  --node: #1c4b66;
  --node-ink: #ffffff;
  --access: #0e8a3b;
  --watch: #c98613;
  --reserve: #c1272d;
  --withhold: #5a6b76;
  --warn-bg: #fff4d6;
  --warn-line: #e7c574;
  --bad-bg: #fde8e9;
  --bad-line: #e6acaf;
  --good-bg: #e8f6ec;
  --good-line: #a8d8b5;
  --shadow: 0 1px 2px rgba(15, 35, 50, .05), 0 8px 24px rgba(15, 35, 50, .06);
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(1080px, 100% - 2rem); margin-inline: auto; }

/* Header */
.site-header {
  background: var(--brand);
  color: var(--brand-ink);
  position: sticky; top: 0; z-index: 10;
  box-shadow: 0 2px 6px rgba(0,0,0,.08);
}
.site-header .wrap {
  display: flex; gap: 1rem; align-items: center;
  padding: .75rem 0;
  flex-wrap: wrap;
  /* leave the top-right corner free for the About icon */
  position: relative;
  padding-right: 3rem;
}
.brand {
  background: none; border: 0; color: inherit;
  display: flex; flex-direction: row; align-items: center;
  gap: .65rem;
  cursor: pointer; padding: 0; text-align: left;
}
.brand-logo {
  display: block;
  height: 40px;
  width: auto;
  background: #fff;
  padding: 4px 8px;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,.12);
  flex: 0 0 auto;
}
.brand-text {
  display: flex; flex-direction: column; align-items: flex-start; line-height: 1.15;
}
.brand-mark { font-weight: 800; font-size: 1.15rem; letter-spacing: .04em; }
.brand-sub { font-size: .78rem; opacity: .8; }

@media (max-width: 520px) {
  .brand-text .brand-mark { display: none; }
  .brand-sub { font-size: .72rem; }
}

/* PWA installed (standalone display) niceties */
@media (display-mode: standalone) {
  body { overscroll-behavior-y: none; }
  .site-header { padding-top: env(safe-area-inset-top); }
}

.top-nav {
  margin-left: auto;
  display: flex; gap: .25rem; flex-wrap: wrap;
}
.top-nav button {
  background: rgba(255,255,255,.08);
  color: var(--brand-ink);
  border: 1px solid rgba(255,255,255,.15);
  padding: .45rem .7rem;
  border-radius: 999px;
  font: inherit; font-size: .85rem;
  cursor: pointer;
}
.top-nav button:hover { background: rgba(255,255,255,.18); }
.top-nav button.nav-cta {
  background: var(--brand-ink);
  color: var(--brand);
  border-color: var(--brand-ink);
  font-weight: 700;
  display: inline-flex; align-items: center;
  gap: .4rem;
}
.top-nav button.nav-cta .play-icon { background: rgba(22,56,78,.14); }
.top-nav button.nav-cta:hover { background: #e7eef3; border-color: #e7eef3; }
.top-nav button.is-active { background: var(--accent); border-color: var(--accent); }
.top-nav button.nav-cta.is-active { background: var(--accent); border-color: var(--accent); color: var(--brand-ink); }
.top-nav button.nav-cta.is-active .play-icon { background: rgba(255,255,255,.25); }
.top-nav button.nav-install {
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}
.top-nav button.nav-install:hover { filter: brightness(1.1); }

/* About — icon-only button pinned to the header's top-right corner */
.nav-about {
  position: absolute;
  top: 1rem; right: 0;
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08);
  color: var(--brand-ink);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 50%;
  padding: 0;
  cursor: pointer;
}
.nav-about:hover { background: rgba(255,255,255,.18); }
.nav-about.is-active { background: var(--accent); border-color: var(--accent); }

main { padding: 1.25rem 0 3rem; }

/* Anchored sub-sections inside Reference (Algorithms, Glossary, Tables) —
   offset the scroll target so the sticky header doesn't cover the heading. */
.section-anchor { scroll-margin-top: 5.5rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 1rem 0 1.25rem;
  color: var(--ink-soft);
  font-size: .85rem;
}
.site-footer p { margin: .25rem 0; }
.aware-legend { display: flex; gap: .35rem; align-items: center; flex-wrap: wrap; }
.footer-links a { color: var(--brand); font-weight: 600; text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }

/* About & install */
.install-steps { margin: .35rem 0 .75rem; padding-left: 1.4rem; }
.install-steps li { margin: .25rem 0; }
.install-ok { color: var(--access, #1a7f37); font-weight: 700; }

/* Cards & sections */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
  margin: 0 0 1rem;
}
.card h1, .card h2, .card h3 { margin: .25rem 0 .6rem; }
.card h1 { font-size: 1.35rem; }
.card h2 { font-size: 1.1rem; }
.card h3 { font-size: .95rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .05em; }
.muted { color: var(--ink-soft); }
.lead { color: var(--ink-soft); font-size: .95rem; margin: 0 0 .75rem; }

.grid {
  display: grid;
  gap: .8rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.tile {
  display: block; text-align: left;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: border-color .12s, transform .12s, box-shadow .12s;
}
.tile:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow); }
.tile .tile-title { font-weight: 600; font-size: 1rem; margin-bottom: .15rem; }
.tile .tile-sub { color: var(--ink-soft); font-size: .85rem; }
.tile .tile-tag { display: inline-block; font-size: .7rem; color: var(--ink-soft); margin-top: .35rem; }

/* Decision tree */
.tree {
  display: grid;
  gap: .8rem;
}
.node {
  background: var(--node);
  color: var(--node-ink);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  font-weight: 600;
}
.node .qhint { display: block; font-weight: 400; font-size: .85rem; opacity: .85; margin-top: .25rem; }
.options {
  display: grid;
  gap: .5rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.options button {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .75rem .8rem;
  text-align: left;
  font: inherit;
  cursor: pointer;
  color: var(--ink);
  transition: border-color .12s, background .12s;
}
.options button:hover { border-color: var(--accent); background: #f1f7fb; }
.options button .opt-sub { display: block; color: var(--ink-soft); font-size: .8rem; font-weight: 400; }

.options.follow-up { margin-top: 1rem; grid-template-columns: 1fr; }
.options.follow-up button {
  background: #f1f7fb;
  border-color: var(--accent);
  font-weight: 600;
}

.crumb {
  display: flex; gap: .35rem; align-items: center;
  flex-wrap: wrap;
  font-size: .85rem;
  color: var(--ink-soft);
  margin-bottom: .5rem;
}
.crumb button {
  background: none; border: 0; padding: 0;
  color: var(--accent); cursor: pointer; font: inherit;
}
.crumb button:hover { text-decoration: underline; }
.crumb .sep { opacity: .6; }
.crumb .current { color: var(--ink); }

.controls {
  display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .8rem;
}
.btn {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .5rem .8rem;
  font: inherit;
  cursor: pointer;
  color: var(--ink);
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.btn.cta {
  flex-basis: 100%;
  font-size: 1.1rem;
  font-weight: 700;
  padding: .8rem 1.2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
  display: inline-flex; align-items: center; justify-content: center;
  gap: .55rem;
}

/* Circled play glyph in front of the clinical-guidance CTAs */
.play-icon {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.6em; height: 1.6em;
  border-radius: 50%;
  background: rgba(255,255,255,.25);
  font-size: .68em;
  /* the ▶ glyph sits left of centre inside its box */
  padding-left: .15em;
}

/* Result */
.result {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0;
  overflow: hidden;
}
.result-head { padding: .75rem 1rem; color: #fff; font-weight: 700; }
.result-head.access  { background: var(--access); }
.result-head.watch   { background: var(--watch); }
.result-head.reserve { background: var(--reserve); }
.result-head.withhold{ background: var(--withhold); }
.result-head .verdict { font-size: 1rem; }
.result-head .subverdict { display: block; font-weight: 500; font-size: .85rem; opacity: .95; margin-top: .15rem; }
.result-body { padding: .9rem 1rem; }
.result-body h4 { margin: .35rem 0 .25rem; font-size: .85rem; text-transform: uppercase; color: var(--ink-soft); letter-spacing: .05em; }

.rx-list { list-style: none; padding: 0; margin: 0 0 .5rem; display: grid; gap: .4rem; }
.rx {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .55rem .7rem;
  display: grid;
  gap: .15rem;
}
.rx-drug { font-weight: 700; }
.rx-drug .aware-dot { display: inline-block; width: .55rem; height: .55rem; border-radius: 50%; vertical-align: middle; margin-right: .35rem; }
.rx-drug .aware-dot.access  { background: var(--access); }
.rx-drug .aware-dot.watch   { background: var(--watch); }
.rx-drug .aware-dot.reserve { background: var(--reserve); }
.rx-dose { font-size: .9rem; }
.rx-meta { font-size: .82rem; color: var(--ink-soft); }
.rx-plus { font-size: .78rem; color: var(--ink-soft); font-style: italic; padding-left: .25rem; }

.callout {
  border-left: 4px solid var(--accent);
  background: #f1f7fb;
  padding: .55rem .75rem;
  border-radius: 8px;
  margin: .4rem 0;
  font-size: .92rem;
}
.callout.warn { border-color: var(--watch); background: var(--warn-bg); }
.callout.bad  { border-color: var(--reserve); background: var(--bad-bg); }
.callout.good { border-color: var(--access); background: var(--good-bg); }

.pill {
  display: inline-block;
  font-size: .72rem; line-height: 1;
  padding: .28rem .45rem;
  border-radius: 999px;
  font-weight: 700;
  color: #fff;
  vertical-align: middle;
}
.pill.access  { background: var(--access); }
.pill.watch   { background: var(--watch); }
.pill.reserve { background: var(--reserve); }
.pill.withhold{ background: var(--withhold); }

/* Tables */
.table-wrap { overflow-x: auto; }
table.ref {
  width: 100%; border-collapse: collapse; font-size: .88rem;
}
table.ref th, table.ref td {
  border: 1px solid var(--line);
  padding: .4rem .55rem;
  text-align: left;
  vertical-align: top;
}
table.ref thead th { background: #eef3f6; }
table.ref td.s-pp { background: #e8f6ec; text-align: center; font-weight: 700; color: var(--access); }
table.ref td.s-p  { background: #f1f9ee; text-align: center; font-weight: 700; color: var(--access); }
table.ref td.s-pm { background: #fff7e0; text-align: center; font-weight: 700; color: var(--watch); }
table.ref td.s-no { background: #fde8e9; text-align: center; font-weight: 700; color: var(--reserve); }
table.ref td.s-bang { background: #fff4d6; text-align: center; font-weight: 700; color: var(--watch); }
table.ref td.s-dash{ background: #f2f3f5; text-align: center; color: var(--ink-soft); }

.legend { font-size: .82rem; color: var(--ink-soft); margin-top: .4rem; }

/* Calculators */
.calc-form { display: grid; gap: .5rem; }
.calc-row {
  display: flex; align-items: center; gap: .55rem;
  padding: .45rem .6rem;
  border: 1px solid var(--line); border-radius: 8px;
  background: #fff;
}
.calc-row label { flex: 1; }
.calc-row input[type="number"] { width: 100px; padding: .35rem .4rem; border: 1px solid var(--line); border-radius: 6px; font: inherit; }
.calc-out {
  margin-top: .6rem;
  padding: .7rem .8rem;
  border-radius: 10px;
  background: var(--good-bg);
  border: 1px solid var(--good-line);
}
.calc-out.warn { background: var(--warn-bg); border-color: var(--warn-line); }
.calc-out.bad  { background: var(--bad-bg); border-color: var(--bad-line); }
.calc-out strong { font-size: 1.1rem; }

.dl-2 {
  display: grid; grid-template-columns: max-content 1fr; gap: .25rem .8rem;
  font-size: .9rem;
}
.dl-2 dt { font-weight: 600; color: var(--ink-soft); }
.dl-2 dd { margin: 0; }

/* PDF call-to-action on the home card */
.pdf-cta { margin: .8rem 0 0; font-size: .95rem; color: var(--ink-soft); }
.pdf-link {
  color: var(--accent); font-weight: 600; text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.pdf-link:hover { color: var(--brand); }

.btn.small { padding: .35rem .65rem; font-size: .85rem; }

/* Algorithms gallery */
.algo-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.algo-card {
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
}
.algo-card.is-focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.algo-thumb {
  display: block; width: 100%; padding: 0; border: 0;
  background: #f1f4f7; cursor: zoom-in;
  aspect-ratio: 4 / 3; overflow: hidden;
}
.algo-thumb img {
  width: 100%; height: 100%; object-fit: contain; object-position: center top;
  background: #fff;
}
.algo-meta { padding: .75rem .9rem 1rem; display: flex; flex-direction: column; gap: .35rem; }
.algo-title { font-weight: 700; color: var(--brand); }
.algo-sub { font-size: .8rem; }
.algo-caption { margin: .35rem 0 .25rem; font-size: .9rem; color: var(--ink-soft); }
.algo-actions { display: flex; gap: .4rem; flex-wrap: wrap; margin-top: .35rem; }

/* Inline banner inside a syndrome page */
.algo-banner {
  margin-top: .9rem;
  display: grid; grid-template-columns: 140px 1fr; gap: .9rem; align-items: center;
  padding: .75rem; border: 1px solid var(--line); border-radius: 10px; background: #f7fafc;
}
.algo-banner-thumb {
  padding: 0; border: 1px solid var(--line); border-radius: 8px; overflow: hidden;
  background: #fff; cursor: zoom-in;
  width: 140px; height: 105px;
}
.algo-banner-thumb img {
  width: 100%; height: 100%; object-fit: contain; object-position: center top;
}
.algo-banner-body p { margin: .25rem 0 .5rem; }
@media (max-width: 520px) {
  .algo-banner { grid-template-columns: 1fr; }
  .algo-banner-thumb { width: 100%; height: 160px; }
}

/* Lightbox for full-size algorithm view */
body.lightbox-open { overflow: hidden; }
.lightbox {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(8, 18, 26, .85);
  display: flex; flex-direction: column;
}
.lightbox-bar {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem;
  padding: .6rem .9rem; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.lightbox-title { font-weight: 700; color: var(--brand); }
.lightbox-actions { display: flex; gap: .4rem; flex-wrap: wrap; }
.lightbox-body {
  flex: 1; overflow: auto; padding: 1rem;
  display: flex; align-items: flex-start; justify-content: center;
}
.lightbox-body img {
  max-width: 100%; height: auto;
  background: #fff; border-radius: 6px; box-shadow: 0 8px 30px rgba(0,0,0,.4);
}

/* Search — header input */
.nav-search {
  position: relative;
  flex: 1 1 170px;
  min-width: 180px;
  max-width: 360px;
  display: flex;
  align-items: center;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  padding: 0 .25rem 0 .75rem;
}
.nav-search input {
  flex: 1;
  background: transparent;
  border: 0; outline: 0;
  color: #fff;
  font: inherit;
  /* iOS Safari zooms the viewport when a focused input is < 16px — keep this at 16px. */
  font-size: 16px;
  padding: .35rem 0;
  min-width: 0;
}
.nav-search input::placeholder { color: rgba(255,255,255,.7); }
.nav-search input::-webkit-search-cancel-button { filter: invert(1); opacity: .7; }
.nav-search-go {
  background: rgba(255,255,255,.18);
  border: 0; color: #fff;
  border-radius: 999px;
  padding: .3rem .6rem;
  cursor: pointer;
  font: inherit; font-size: .85rem;
  margin-left: .35rem;
}
.nav-search-go:hover { background: var(--accent); }

.nav-search-suggest {
  position: absolute;
  top: calc(100% + .35rem);
  left: 0; right: 0;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(0,0,0,.18);
  max-height: 60vh; overflow-y: auto;
  z-index: 20;
}
.nav-search-item {
  display: flex; align-items: center; gap: .45rem;
  padding: .5rem .65rem;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
  font-size: .85rem;
}
.nav-search-item:last-child { border-bottom: 0; }
.nav-search-item:hover, .nav-search-item.is-active { background: #f1f7fb; }
.nav-search-item-title { font-weight: 600; }
.nav-search-item-sub { font-size: .78rem; }
.nav-search-empty { padding: .65rem .75rem; font-size: .85rem; }
.nav-search-more {
  padding: .5rem .65rem;
  cursor: pointer;
  font-size: .82rem;
  background: #f7fafc;
  color: var(--accent);
  font-weight: 600;
  border-top: 1px solid var(--line);
}
.nav-search-more:hover { background: #eaf2f8; }

/* Search — badges */
.badge {
  display: inline-flex; align-items: center;
  font-size: .68rem; font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .03em;
  padding: .2rem .45rem;
  border-radius: 999px;
  background: #eef3f6;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  flex-shrink: 0;
}
.badge-syndrome   { background: #e6f1f8; color: #1f4f6f; border-color: #c6dceb; }
.badge-organism   { background: #efeaf8; color: #523a83; border-color: #d3c8ec; }
.badge-antibiotic { background: #e7f5ec; color: #1f6f3b; border-color: #b8dec6; }
.badge-algorithm  { background: #fff1d6; color: #8a5a10; border-color: #ecd49a; }
.badge-glossary   { background: #f1f1f3; color: #4a5b67; border-color: var(--line); }
.badge.aware-watch   { box-shadow: inset 0 0 0 2px var(--watch); }
.badge.aware-reserve { box-shadow: inset 0 0 0 2px var(--reserve); }

/* Search — results page */
.home-search {
  display: flex; gap: .5rem; align-items: center; flex-wrap: wrap;
  margin: .25rem 0;
}
.home-search input {
  flex: 1 1 260px;
  padding: .55rem .75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit; font-size: 1rem;
  background: #fff;
  color: var(--ink);
  outline: none;
}
.home-search input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(31, 111, 156, .15); }

.search-chips {
  display: flex; gap: .35rem; flex-wrap: wrap; margin-top: .5rem;
}
.chip {
  background: #eef3f6;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .25rem .65rem;
  font-size: .8rem;
  cursor: pointer;
  color: var(--ink);
}
.chip:hover { border-color: var(--accent); background: #e1ecf3; }

.search-results {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: .5rem;
}
.search-hit {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .65rem .8rem;
  cursor: pointer;
  background: #fff;
  transition: border-color .12s, background .12s, transform .12s;
}
.search-hit:hover { border-color: var(--accent); background: #f7fbfd; transform: translateY(-1px); }
.search-hit-head {
  display: flex; align-items: center; gap: .55rem;
  flex-wrap: wrap;
}
.search-hit-title { font-weight: 700; font-size: .98rem; }
.search-hit-sub { font-size: .82rem; margin-top: .1rem; }
.search-hit-snippet { font-size: .88rem; color: var(--ink-soft); margin-top: .25rem; }

/* Tag clouds on the empty-search browse view */
.tag-cloud {
  display: flex; flex-wrap: wrap; gap: .4rem;
}
.tag {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .3rem .65rem;
  cursor: pointer;
  font: inherit; font-size: .82rem;
  color: var(--ink);
  display: inline-flex; align-items: center; gap: .35rem;
}
.tag:hover { border-color: var(--accent); background: #f7fbfd; }
.tag .aware-dot { width: .55rem; height: .55rem; border-radius: 50%; display: inline-block; }
.tag .aware-dot.access  { background: var(--access); }
.tag .aware-dot.watch   { background: var(--watch); }
.tag .aware-dot.reserve { background: var(--reserve); }

/* Link-styled button (used in organism spectrum table) */
.linklike {
  background: none; border: 0; padding: 0;
  color: var(--accent); cursor: pointer; font: inherit;
  text-decoration: underline; text-underline-offset: 2px;
}
.linklike:hover { color: var(--brand); }

@media (max-width: 720px) {
  .nav-search { max-width: 100%; order: 99; flex-basis: 100%; }
}

/* Print */
@media print {
  .site-header, .site-footer, .top-nav, .controls, .lightbox, .nav-search { display: none !important; }
  body { background: #fff; }
  .card, .result { box-shadow: none; border-color: #aaa; page-break-inside: avoid; }
  .algo-thumb { aspect-ratio: auto; }
  .algo-thumb img, .algo-banner-thumb img { max-height: 280px; }
}