/* PHFC palette, sampled from the clinic's own logo (2026-10-25). */
:root {
  --navy: #1A4A92;
  --blue: #1F86C2;
  --sky: #6CB4D8;
  --ink: #2A2A32;
  --muted: #5d6170;
  --bg: #f5f8fc;
  --card: #ffffff;
  --line: #dde6f1;
  --tint: #eaf4fb;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.6 "Nunito Sans", system-ui, -apple-system, Segoe UI, sans-serif;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
a { color: var(--blue); }
h1, h2, h3, h4 { color: var(--navy); line-height: 1.25; margin: 0 0 .4em; font-weight: 800; }
h1 { font-size: 1.9rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.15rem; }

/* Header */
.top { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy); font-weight: 800; }
.brand img { height: 40px; width: auto; }
.brand span { font-size: .95rem; border-left: 2px solid var(--line); padding-left: 10px; }
.top nav { display: flex; gap: 4px; }
.top nav a { text-decoration: none; color: var(--navy); font-weight: 600; padding: 8px 12px; border-radius: 999px; }
.top nav a[aria-current] { background: var(--tint); }
@media (max-width: 520px) { .brand span { display: none; } .brand img { height: 34px; } }

main { padding: 20px 16px 48px; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy), var(--blue)); color: #fff;
  border-radius: var(--radius); padding: 28px 24px; margin-bottom: 18px;
}
.hero h1 { color: #fff; }
.hero p { margin: 0; font-size: 1.05rem; opacity: .95; }
.hero.small { display: flex; gap: 16px; align-items: flex-start; padding: 22px 20px; }
.hero.small .ico.big { color: #fff; background: rgba(255,255,255,.15); }
.hero .meta { margin-top: 8px; font-weight: 700; color: #fff; }

/* 3 steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 18px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; display: flex; gap: 10px; }
.step b { flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--sky); color: #fff; display: grid; place-items: center; }
.step p { margin: 0; font-size: .95rem; }
@media (max-width: 640px) { .steps { grid-template-columns: 1fr; } }

/* Search */
.searchbox { margin-bottom: 22px; }
.searchbox label { display: block; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
.searchbox input {
  width: 100%; font: inherit; padding: 14px 16px; border: 2px solid var(--line);
  border-radius: 12px; background: #fff; color: var(--ink);
}
.searchbox input:focus { outline: none; border-color: var(--blue); }
.results { list-style: none; margin: 8px 0 0; padding: 0; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.results li a { display: block; padding: 12px 16px; text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--line); }
.results li:last-child a { border-bottom: 0; }
.results li a:hover { background: var(--tint); }
.results small { display: block; color: var(--muted); }

/* Topic grid */
.h2 { margin-top: 8px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 6px;
  transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--sky); transform: translateY(-2px); }
.card p { margin: 0; font-size: .95rem; color: var(--muted); flex: 1; }
.card h3 { margin: 4px 0 0; }
.meta { font-size: .85rem; color: var(--blue); font-weight: 700; }
.tag { font-size: .7rem; font-weight: 700; color: var(--navy); background: var(--tint); padding: 2px 8px; border-radius: 999px; margin-left: 8px; vertical-align: middle; }
.ico { width: 22px; height: 22px; flex: none; }
.ico.big { width: 44px; height: 44px; padding: 9px; border-radius: 12px; background: var(--tint); color: var(--blue); }

/* Continue banner */
.continue { display: flex; align-items: center; justify-content: space-between; gap: 12px; background: #fff; border: 2px solid var(--sky); border-radius: var(--radius); padding: 14px 18px; margin-bottom: 22px; }
.continue p { margin: 0; }

/* Topic page */
.back { display: inline-block; margin-bottom: 12px; text-decoration: none; font-weight: 700; }
.toc { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; margin-bottom: 22px; }
.toc ol { margin: 6px 0 0; padding-left: 20px; }
.sec { margin-bottom: 28px; }
.sec > h2 { padding-top: 6px; border-top: 3px solid var(--sky); padding-top: 14px; }
.lesson { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 12px; scroll-margin-top: 80px; }
.lesson .lead { font-size: 1.08rem; font-weight: 600; color: var(--navy); }
.try { background: var(--tint); border-left: 4px solid var(--blue); border-radius: 10px; padding: 14px 16px; margin: 14px 0; }
.try-h { display: flex; align-items: center; gap: 6px; font-weight: 800; color: var(--blue); }
.try p { margin: 6px 0 10px; }
.btn {
  font: inherit; font-weight: 700; border: 0; border-radius: 999px; padding: 10px 18px;
  background: var(--blue); color: #fff; cursor: pointer; min-height: 44px;
}
.btn:hover { background: var(--navy); }
.btn.added { background: #fff; color: var(--navy); border: 2px solid var(--sky); }
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); padding: 6px 12px; min-height: 36px; font-weight: 600; }
.done { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: .95rem; cursor: pointer; }
.done input, .planitem input { width: 22px; height: 22px; accent-color: var(--blue); }
.faq { margin-top: 6px; }
.faq h4 { color: var(--navy); }
details { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 8px; }
summary { cursor: pointer; padding: 14px 16px; font-weight: 700; list-style: none; position: relative; padding-right: 40px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 16px; top: 10px; font-size: 1.4rem; color: var(--blue); }
details[open] summary::after { content: "−"; }
details p { margin: 0 16px 14px; }
.note { background: #fff; border: 1px dashed var(--sky); border-radius: 12px; padding: 12px 16px; color: var(--muted); }
.prevnext { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.pn { font-weight: 700; text-decoration: none; padding: 12px 16px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.pn.next { margin-left: auto; }

/* My plan */
.planitem { display: flex; gap: 12px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 10px; }
.planitem .txt { flex: 1; }
.planitem p { margin: 0 0 4px; }
.planitem small a { font-weight: 600; }
.planitem.isdone .txt p { text-decoration: line-through; color: var(--muted); }
.empty { text-align: center; padding: 28px 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }

/* Footer */
.foot { border-top: 1px solid var(--line); background: #fff; color: var(--muted); font-size: .88rem; padding: 18px 0; }
.foot p { margin: 0 0 6px; }

/* Login */
.login { max-width: 420px; margin: 8vh auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 22px; text-align: center; }
.login img { height: 52px; width: auto; margin-bottom: 12px; }
.login input { width: 100%; font: inherit; font-size: 1.2rem; text-align: center; letter-spacing: .08em; padding: 14px; border: 2px solid var(--line); border-radius: 12px; margin: 12px 0; }
.login .btn { width: 100%; }
.err { color: #a12a2a; font-weight: 700; }

/* References */
.refs { margin-top: 8px; }
.refs > p { margin: 0 16px 10px; color: var(--muted); }
.refs ol { margin: 0 16px 16px; padding-left: 20px; }
.refs li { margin-bottom: 10px; }
.refs li a { font-weight: 600; }
.refs small { display: block; color: var(--muted); }

/* Four nav links: second row on phones */
@media (max-width: 560px) {
  .top-in { flex-wrap: wrap; padding-top: 8px; padding-bottom: 6px; gap: 4px; }
  .top nav { width: 100%; justify-content: space-between; }
  .top nav a { padding: 6px 10px; font-size: .92rem; }
}
.lesson h4 { margin-top: 14px; }