/* ZMS blog — reading pages. Same brand tokens as style.css, light "lab paper" theme. */
:root {
  --ink: #0a1117; --navy: #1a3347; --teal: #2e8494; --teal-2: #3ba0b5; --teal-3: #6fd0de;
  --bg: #f3f8f9; --card: #fff; --fg: #0f2230; --fg-2: #4a5f6b; --fg-3: #8a9ea8;
  --line: rgba(15,34,48,.10); --rose: #d0506d;
  --f-body: 'Vazirmatn', system-ui, Tahoma, sans-serif;
  --f-head: 'Space Grotesk', 'Vazirmatn', sans-serif;
  --f-mono: 'JetBrains Mono', 'Vazirmatn', monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 90px; overflow-x: clip; }
body {
  margin: 0; background: var(--bg); color: var(--fg); font-family: var(--f-body); font-size: 17px; line-height: 1.9;
  background-image: linear-gradient(rgba(15,34,48,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(15,34,48,.045) 1px, transparent 1px);
  background-size: 120px 120px; background-attachment: fixed;
}
a { color: var(--teal); }
img, svg { max-width: 100%; }
.b-wrap { width: min(1080px, 100% - 32px); margin-inline: auto; }

/* header */
.b-nav {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px max(16px, calc((100% - 1080px) / 2)); background: rgba(243,248,249,.86); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.b-logo { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; }
.b-mark { width: 34px; height: 34px; color: var(--teal); }
.b-logo span { display: grid; line-height: 1.15; }
.b-logo b { font-family: var(--f-head); letter-spacing: .14em; font-size: 17px; }
.b-logo small { font-size: 11px; color: var(--fg-2); }
.b-nav nav { display: flex; gap: 22px; font-size: 15px; }
.b-nav nav a { color: var(--fg-2); text-decoration: none; }
.b-nav nav a:hover { color: var(--teal); }

/* index */
.b-hero { padding: 64px 0 24px; max-width: 760px; }
.b-kicker { font-family: var(--f-mono); font-size: 12px; color: var(--teal); padding: 3px 9px; border: 1px solid rgba(46,132,148,.4); border-radius: 6px; }
.b-hero h1 { font-size: clamp(30px, 4.4vw, 50px); line-height: 1.3; margin: 18px 0 12px; font-weight: 800; }
.b-hero p { color: var(--fg-2); font-size: 18px; margin: 0 0 22px; }
.b-tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.b-tabs a { padding: 9px 18px; border-radius: 99px; border: 1px solid var(--line); background: var(--card); color: var(--fg); text-decoration: none; font-weight: 600; font-size: 15px; }
.b-tabs a:hover { border-color: var(--teal); color: var(--teal); }
.b-sec { padding: 36px 0 12px; }
.b-sec h2 { font-size: 26px; margin: 0 0 4px; }
.b-sec-sub { color: var(--fg-2); margin: 0 0 20px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 14px; }
.card {
  display: flex; flex-direction: column; gap: 8px; padding: 20px; border-radius: 18px; background: var(--card);
  border: 1px solid var(--line); color: var(--fg); text-decoration: none; transition: transform .35s, border-color .3s, box-shadow .35s;
}
.card:hover { transform: translateY(-3px); border-color: rgba(46,132,148,.5); box-shadow: 0 18px 40px -26px rgba(15,34,48,.45); }
.card h3 { margin: 0; font-size: 18px; line-height: 1.55; }
.card p { margin: 0; color: var(--fg-2); font-size: 14.5px; line-height: 1.8; flex: 1; }
.card small { color: var(--fg-3); font-size: 12.5px; }
.aud { align-self: flex-start; font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 99px; }
.aud--patients { color: #1f6f7d; background: rgba(46,132,148,.12); }
.aud--doctors { color: #fff; background: var(--navy); }

/* article */
.b-article { max-width: 780px; padding-bottom: 40px; }
.crumbs { font-size: 13px; color: var(--fg-3); padding: 26px 0 0; }
.crumbs a { color: var(--fg-2); text-decoration: none; }
.a-head { padding: 18px 0 8px; }
.a-head h1 { font-size: clamp(28px, 4vw, 42px); line-height: 1.4; margin: 12px 0; font-weight: 800; }
.a-lead { font-size: 19px; color: var(--fg-2); margin: 0 0 10px; }
.a-meta { font-size: 13px; color: var(--fg-3); margin: 0; }
.toc { margin: 22px 0; padding: 18px 22px; border-radius: 16px; background: var(--card); border: 1px solid var(--line); }
.toc b { font-size: 14px; }
.toc ol { list-style: persian; margin: 8px 0 0; padding-inline-start: 22px; font-size: 15px; line-height: 2; }
.toc a { color: var(--fg-2); text-decoration: none; }
.toc a:hover { color: var(--teal); }
.a-body { font-size: 18px; line-height: 2.05; }
.a-body ol { list-style: persian; }
.a-body h2 { font-size: 25px; line-height: 1.5; margin: 42px 0 10px; }
.a-body h3 { font-size: 20px; line-height: 1.6; margin: 28px 0 6px; }
.a-body p { margin: 0 0 18px; }
.a-body ul, .a-body ol { padding-inline-start: 24px; margin: 0 0 18px; }
.a-body li { margin-bottom: 6px; }
.a-body strong { color: var(--navy); }
.a-body blockquote { margin: 22px 0; padding: 14px 20px; border-inline-start: 4px solid var(--rose); background: #fff4f6; border-radius: 0 12px 12px 0; font-size: 17px; }
.a-body blockquote p:last-child { margin: 0; }
.a-body table { max-width: 100%; border-collapse: collapse; margin: 0 0 22px; font-size: 15.5px; background: var(--card); border-radius: 12px; overflow: hidden; }
.a-body th, .a-body td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: start; vertical-align: top; }
.a-body th { background: rgba(46,132,148,.08); font-weight: 700; }
.faq { margin: 0 0 10px; border: 1px solid var(--line); border-radius: 14px; background: var(--card); }
.faq summary { cursor: pointer; padding: 14px 18px; font-weight: 700; font-size: 17px; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: '+'; display: inline-block; width: 22px; color: var(--teal); font-weight: 800; }
.faq[open] summary::before { content: '–'; }
.faq > div { padding: 0 18px 4px; font-size: 17px; }
.sources { font-size: 14px; line-height: 1.9; color: var(--fg-2); direction: rtl; }
.sources h2 { font-size: 18px !important; }
.sources li { direction: ltr; text-align: left; unicode-bidi: plaintext; }
.cta-box { margin: 34px 0 14px; padding: 22px 24px; border-radius: 18px; background: linear-gradient(140deg, #2e8494, #1a3347); color: #fff; }
.cta-box b { font-size: 19px; }
.cta-box p { margin: 6px 0 14px; color: rgba(255,255,255,.85); }
.cta-box--soft { background: var(--card); color: var(--fg); border: 1px solid rgba(46,132,148,.35); }
.cta-box--soft p { color: var(--fg-2); margin-bottom: 0; }
.b-btn { display: inline-block; padding: 10px 22px; border-radius: 99px; background: #fff; color: var(--navy); font-weight: 700; text-decoration: none; }
.disclaimer { font-size: 13.5px; color: var(--fg-3); }
.related { padding-top: 22px; border-top: 1px solid var(--line); }
.related h2 { font-size: 20px; }

/* footer */
.b-foot { margin-top: 50px; padding: 36px 0 28px; background: var(--ink); color: #c9dde2; font-size: 14px; }
.b-foot-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.b-foot-brand .b-mark { color: var(--teal-3); width: 40px; height: 40px; }
.b-foot-brand div { display: grid; }
.b-foot-brand span { color: #8fa4ae; font-size: 13px; }
.b-foot p { margin: 6px 0; color: #8fa4ae; }
.b-foot a { color: var(--teal-3); }
.b-copy { font-size: 12.5px; }

@media (max-width: 700px) {
  body { font-size: 16px; }
  .b-nav nav { gap: 14px; font-size: 14px; }
  .b-nav nav a:nth-child(3) { display: none; }
  .b-logo small { display: none; }
  .a-body { font-size: 17px; line-height: 2; }
  .b-hero { padding-top: 36px; }
}