:root{
  --primary:#0b6fc2;--primary-dark:#0057a8;--navy:#041e42;--deep:#0b3a5e;
  --ink:#1b2b3a;--body:#2b3a47;--muted:#5b6b7c;--line:#e2e8f0;--tint:#f4f9ff;
  --danger:#d13b3b;--danger-bg:#fdecec;--danger-ink:#a51f1f;
  --warn:#b06f12;--warn-bg:#fff6e8;
  --good:#2a6540;--good-bg:#eef7f0;
  --r-md:10px;--r-lg:14px;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--body);line-height:1.75;background:#fff}
a{color:var(--primary)}
.wrap{max-width:800px;margin:0 auto;padding:0 20px}

header.top{background:var(--navy);color:#fff;padding:24px 0}
header.top .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px}
header.top a{color:#9fd0ff;text-decoration:none;font-size:.9rem}
.brand{font-weight:700;letter-spacing:.5px}

.hero{background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 55%,#0096ec 100%);color:#fff;padding:48px 0 44px}
.eyebrow{font-size:.72rem;letter-spacing:2px;color:#bfe0ff;margin:0 0 10px;font-weight:700}
h1{font-size:clamp(1.7rem,4.4vw,2.5rem);line-height:1.16;margin:0 0 14px;color:#fff}
.hero p{margin:0 0 8px;color:rgba(255,255,255,.93);max-width:62ch}
.hero .meta{margin-top:20px;padding-top:16px;border-top:1px solid rgba(255,255,255,.28);font-size:.84rem;color:rgba(255,255,255,.82);display:flex;flex-wrap:wrap;gap:6px 24px}

h2{font-size:1.45rem;color:var(--deep);margin:0;line-height:1.28}
h3{font-size:1.12rem;color:var(--deep);margin:30px 0 10px}
h4{font-size:1rem;color:var(--deep);margin:24px 0 6px}
p{margin:0 0 16px}
ul,ol{margin:0 0 18px;padding-left:22px}
li{margin-bottom:9px}
strong{color:var(--ink)}

section{padding:40px 0 4px;scroll-margin-top:16px}
.sec-head{border-top:2px solid var(--deep);padding-top:14px;margin-bottom:24px}
.sec-num{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--primary);font-weight:700}
.sec-head h2{margin-top:6px}
.sec-sub{color:var(--muted);font-size:.96rem;margin-top:8px}

/* Scope box under the hero: who this is for. */
.scope{background:var(--danger-bg);border-left:4px solid var(--danger);border-radius:var(--r-md);padding:18px 20px;margin:28px 0 8px}
.scope p{margin:0 0 8px;color:#7a2318}
.scope p:last-child{margin-bottom:0}

/* ---------------------------------------------------------------------------
   Chapter navigation
   The chapter is nine pages. Every page carries the same ordered list, with the
   current page marked, so a reader who arrives from a search on part six can
   see the shape of the whole thing and get to part one. The ordering is real:
   the parts build on each other, which is why it is an <ol> and why the pager
   at the foot says previous and next rather than just linking sideways.
   ------------------------------------------------------------------------ */
.chapternav{background:var(--tint);border:1px solid var(--line);border-radius:var(--r-lg);padding:18px 22px;margin:26px 0 8px}
.chapternav .cn-label{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:0 0 10px}
.chapternav ol{margin:0;padding-left:20px;columns:2;column-gap:28px}
.chapternav li{margin-bottom:6px;break-inside:avoid;font-size:.93rem}
.chapternav li.on{font-weight:700;color:var(--ink);list-style-type:disc}
.chapternav li.on a{color:var(--ink);text-decoration:none}
@media(max-width:640px){.chapternav ol{columns:1}}

.pager{display:flex;flex-wrap:wrap;gap:12px;margin:36px 0 8px}
.pager a{flex:1 1 240px;display:block;padding:14px 18px;border:1px solid var(--line);border-radius:var(--r-md);text-decoration:none;color:var(--ink);font-weight:600;background:#fff}
.pager a:hover,.pager a:focus-visible{border-color:var(--primary)}
.pager a span{display:block;font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-bottom:3px}
.pager .pager-next{text-align:right}

/* Contents */
.contents{background:var(--tint);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px 22px;margin:26px 0 8px}
.contents h2{font-size:1.05rem;margin:0 0 12px}
.contents ol{margin:0;padding-left:20px;columns:2;column-gap:28px}
.contents li{margin-bottom:6px;break-inside:avoid}
@media(max-width:640px){.contents ol{columns:1}}

/* Chips carry guideline grade and potassium band. Both are information. */
.chip{display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.06em;padding:2px 7px;border-radius:4px;white-space:nowrap;background:#e8eef4;color:var(--muted)}
.chip.g-strong{background:#e2eefb;color:var(--primary-dark)}
.chip.g-weak{background:#eef2f6;color:var(--muted)}
.chip.g-op{background:var(--warn-bg);color:var(--warn)}
.chip.k-lo{background:var(--good-bg);color:var(--good)}
.chip.k-mid{background:var(--warn-bg);color:var(--warn)}
.chip.k-hi{background:var(--danger-bg);color:var(--danger-ink)}

/* Callouts */
.callout{background:#eef6fd;border-left:4px solid var(--primary);border-radius:6px;padding:18px 20px;margin:24px 0}
.callout .ctitle{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--primary-dark);font-weight:700;margin-bottom:8px}
.callout p:last-child,.callout ul:last-child{margin-bottom:0}
.callout.trap{background:var(--danger-bg);border-left-color:var(--danger)}
.callout.trap .ctitle{color:var(--danger-ink)}
.callout.flag{background:var(--warn-bg);border-left-color:var(--warn)}
.callout.flag .ctitle{color:var(--warn)}
.callout.script{background:var(--good-bg);border-left-color:var(--good)}
.callout.script .ctitle{color:var(--good)}
.callout.script .say{font-size:1.08rem;font-style:italic;line-height:1.6;color:var(--ink)}

/* Wide tables break out of the 800px column on desktop and scroll on phones,
   which is the site rule: the page body never scrolls sideways. */
.tablewrap{overflow-x:auto;margin:22px 0 26px;margin-left:50%;transform:translateX(-50%);width:min(1120px,calc(100vw - 40px));border:1px solid var(--line);border-radius:var(--r-md);background:#fff}
table{width:100%;border-collapse:collapse;font-size:.93rem;min-width:34rem}
caption{text-align:left;padding:12px 15px;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line)}
th,td{padding:10px 15px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--tint);color:var(--deep);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;font-weight:700}
tbody tr:last-child td{border-bottom:none}
td.num,th.num{font-variant-numeric:tabular-nums;white-space:nowrap}
td.food{font-weight:600;color:var(--ink)}
.tablewrap:focus-visible{outline:2px solid var(--primary);outline-offset:3px}

/* Cards */
.cards{display:grid;gap:14px;margin:22px 0;grid-template-columns:repeat(auto-fit,minmax(228px,1fr))}
.card{background:var(--tint);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px 18px}
.card h4{margin:0 0 4px;font-size:.96rem}
.card .big{font-size:1.45rem;font-weight:700;color:var(--primary);line-height:1.2;margin:6px 0 4px}
.card p{font-size:.88rem;margin:0}

/* Numbered principles. The numbering is real: they are ten, in priority order. */
.principles{list-style:none;padding:0;margin:24px 0}
.principles li{display:grid;grid-template-columns:42px minmax(0,1fr);gap:14px;padding:18px 0;border-top:1px solid var(--line);margin:0}
.principles li:last-child{border-bottom:1px solid var(--line)}
.principles .pn{font-size:.82rem;font-weight:700;color:var(--primary);padding-top:4px}
.principles h4{margin:0 0 4px;font-size:1.08rem}
.principles p{margin:0;font-size:.95rem}

/* Day plans */
.menu{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:18px 20px}
.menu h4{margin:0 0 2px}
.menu .tag{font-size:.74rem;color:var(--muted)}
.menu dl{margin:14px 0 0;display:grid;grid-template-columns:auto minmax(0,1fr);gap:6px 14px;font-size:.92rem}
.menu dt{font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding-top:5px}
.menu dd{margin:0}
.menu .tally{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums}

.refs{font-size:.88rem}
.refs ol{padding-left:22px}
.refs li{margin-bottom:9px}

footer.bot{margin-top:44px;padding:26px 0 44px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
nav.more ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px 18px}

a:focus-visible,button:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:4px}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(max-width:640px){
  .hero{padding:36px 0 34px}
  section{padding:32px 0 4px}
  .tablewrap{margin-left:0;transform:none;width:100%}
  table{font-size:.88rem}
  th,td{padding:9px 11px}
}
@media print{
  header.top,footer.bot nav,.pager{display:none!important}
  .hero{background:none!important;color:#000!important;padding:0 0 16px}
  .hero h1,.hero p,.hero .eyebrow,.hero .meta{color:#000!important}
  body{font-size:10.5pt}
  .tablewrap{margin-left:0;transform:none;width:100%;break-inside:auto}
  section{break-before:auto}
}

/* ---------------------------------------------------------------------------
   Chapter cards on /clinical
   ------------------------------------------------------------------------ */
.chapter{display:block;background:var(--tint);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;margin:18px 0;text-decoration:none;color:inherit}
.chapter:hover,.chapter:focus-visible{border-color:var(--primary)}
.chapter .ctag{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--primary);font-weight:700}
.chapter h3{margin:8px 0 8px;font-size:1.2rem;line-height:1.3}
.chapter p{margin:0 0 10px;font-size:.95rem}
.chapter .cmeta{font-size:.82rem;color:var(--muted);margin:0}