/* AI for Doctors — clinical editorial system
   Display: Instrument Serif · Body: Geist · Labels: Geist Mono
   Warm-paper light theme, deep clinical-teal accent. No Inter, no Fraunces. */

:root {
  --paper:      #FAF9F6;
  --paper-2:    #F3F1EA;   /* sunken panels */
  --card:       #FFFFFF;
  --ink:        #17191E;
  --ink-soft:   #3A3F48;
  --muted:      #6A7280;
  --line:       #E4E0D6;   /* warm hairline */
  --line-2:     #D7D2C5;
  --accent:     #0E5C6F;   /* deep clinical teal */
  --accent-ink: #0A4856;
  --link:       #1A7B95;
  --gold:       #B07A1E;   /* "editor's pick" warm mark */
  --max:        1160px;
  --read:       40rem;     /* article measure */
  --r:          14px;
  --shadow:     0 1px 2px rgba(23,25,30,.04), 0 8px 28px -12px rgba(23,25,30,.12);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Geist", ui-sans-serif, -apple-system, Segoe UI, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--accent-ink); }

/* ---------- typography ---------- */
.serif { font-family: "Instrument Serif", Georgia, "Times New Roman", serif; font-weight: 400; }
h1, h2, h3 { font-family: "Instrument Serif", Georgia, serif; font-weight: 400; line-height: 1.04; letter-spacing: -.01em; color: var(--ink); margin: 0 0 .4em; }
h1 { font-size: clamp(2.8rem, 6vw, 4.7rem); }
h2 { font-size: clamp(2rem, 3.6vw, 2.9rem); }
h3 { font-size: clamp(1.4rem, 2.2vw, 1.7rem); }
p { margin: 0 0 1.1em; }

.kicker {
  font-family: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .72rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); font-weight: 500;
}
.mono { font-family: "Geist Mono", ui-monospace, Menlo, monospace; }

/* ---------- layout ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 28px; }
.rule { height: 1px; background: var(--line); border: 0; margin: 0; }
section { padding: 84px 0; }
.eyebrow-row { display: flex; align-items: baseline; gap: 14px; margin-bottom: 30px; }
.eyebrow-row .line { flex: 1; height: 1px; background: var(--line); }

/* ---------- header / masthead ---------- */
.masthead { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 50; }
.masthead .wrap { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: 11px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand .mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--accent);
  color: #fff; display: grid; place-items: center; font-family: "Instrument Serif", serif;
  font-size: 1.2rem; line-height: 1; box-shadow: var(--shadow);
}
.brand b { font-family: "Instrument Serif", serif; font-weight: 400; font-size: 1.4rem; letter-spacing: -.01em; }
.brand .tld { color: var(--muted); }
.nav { display: flex; align-items: center; gap: 30px; }
.nav a { color: var(--ink-soft); font-size: .94rem; }
.nav a:hover { color: var(--accent); }
.nav .cta {
  font-family: "Geist Mono", monospace; font-size: .8rem; letter-spacing: .04em;
  border: 1px solid var(--line-2); padding: 8px 15px; border-radius: 9px; color: var(--ink);
}
.nav .cta:hover { border-color: var(--accent); color: var(--accent); }
.menu-btn { display: none; }

/* ---------- hero (asymmetric editorial) ---------- */
.hero { padding: 78px 0 30px; }
.hero-grid { display: grid; grid-template-columns: 1.55fr .95fr; gap: 56px; align-items: end; }
.hero h1 { margin-bottom: .25em; }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero .lede { font-size: 1.22rem; color: var(--ink-soft); max-width: 34ch; }
.hero-aside { border-left: 1px solid var(--line); padding-left: 26px; }
.hero-aside .label { font-family: "Geist Mono", monospace; font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.hero-aside ul { list-style: none; margin: 0; padding: 0; }
.hero-aside li { padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .95rem; color: var(--ink-soft); display: flex; gap: 10px; }
.hero-aside li span { font-family: "Geist Mono", monospace; color: var(--accent); font-size: .82rem; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 9px; font-weight: 500; font-size: .98rem;
  padding: 13px 22px; border-radius: 11px; border: 1px solid transparent; transition: .18s; cursor: pointer; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--accent-ink); color: #fff; transform: translateY(-1px); }
.btn-ghost { border-color: var(--line-2); color: var(--ink); background: var(--card); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn .arr { transition: transform .18s; }
.btn:hover .arr { transform: translateX(3px); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }

/* ---------- editor's picks (the 3 products) ---------- */
.picks { background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pick {
  display: grid; grid-template-columns: 62px 1fr auto; gap: 26px; align-items: center;
  padding: 30px 0; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink);
  transition: .18s;
}
.pick:last-child { border-bottom: 0; }
.pick:hover { color: var(--ink); }
.pick:hover .pick-name { color: var(--accent); }
.pick-num { font-family: "Instrument Serif", serif; font-size: 2.4rem; color: var(--line-2); line-height: 1; }
.pick:hover .pick-num { color: var(--accent); }
.pick-name { font-family: "Instrument Serif", serif; font-size: 1.85rem; line-height: 1.05; transition: color .18s; }
.pick-name .dom { font-family: "Geist Mono", monospace; font-size: .78rem; color: var(--muted); letter-spacing: .02em; margin-left: 4px; vertical-align: middle; }
.pick-desc { color: var(--ink-soft); font-size: 1.02rem; margin: 6px 0 0; max-width: 60ch; }
.pick-tag { font-family: "Geist Mono", monospace; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--line-2); border-radius: 999px; padding: 6px 13px; white-space: nowrap; }
.pick-go { font-family: "Geist Mono", monospace; font-size: .85rem; color: var(--muted); white-space: nowrap; }
.pick:hover .pick-go { color: var(--accent); }

/* ---------- cards / article grid ---------- */
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.acard { background: var(--card); padding: 30px 28px; display: flex; flex-direction: column; gap: 12px; min-height: 230px; transition: background .18s; }
.acard:hover { background: #fff; }
.acard .meta { font-family: "Geist Mono", monospace; font-size: .73rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); display: flex; gap: 10px; }
.acard .meta .cat { color: var(--accent); }
.acard h3 { font-size: 1.5rem; margin: 0; }
.acard h3 a { color: var(--ink); }
.acard:hover h3 a { color: var(--accent); }
.acard .excerpt { color: var(--ink-soft); font-size: .98rem; margin: 0; flex: 1; }
.acard .read { font-family: "Geist Mono", monospace; font-size: .8rem; color: var(--accent); margin-top: auto; }

/* editorial index list (blog page) */
.index-list { border-top: 1px solid var(--line); }
.index-row { display: grid; grid-template-columns: 140px 1fr auto; gap: 28px; align-items: baseline; padding: 28px 0; border-bottom: 1px solid var(--line); }
.index-row .date { font-family: "Geist Mono", monospace; font-size: .8rem; color: var(--muted); }
.index-row h3 { font-size: 1.7rem; margin: 0 0 .25em; }
.index-row h3 a { color: var(--ink); }
.index-row:hover h3 a { color: var(--accent); }
.index-row .ex { color: var(--ink-soft); font-size: 1rem; margin: 0; max-width: 64ch; }
.index-row .cat { font-family: "Geist Mono", monospace; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); }

/* ---------- article ---------- */
.article { padding-top: 56px; }
.article-head { max-width: var(--read); margin: 0 auto 40px; }
.article-head .meta { font-family: "Geist Mono", monospace; font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 22px; }
.article-head .meta .cat { color: var(--accent); }
.article-head h1 { font-size: clamp(2.4rem, 5vw, 3.7rem); }
.article-head .standfirst { font-size: 1.3rem; color: var(--ink-soft); line-height: 1.5; margin-top: .4em; }
.prose { max-width: var(--read); margin: 0 auto; font-size: 1.12rem; line-height: 1.75; color: var(--ink-soft); }
.prose > h2 { font-size: 2rem; color: var(--ink); margin: 1.9em 0 .5em; }
.prose > h3 { font-size: 1.45rem; color: var(--ink); margin: 1.6em 0 .4em; }
.prose p { margin: 0 0 1.3em; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-2); }
.prose a:hover { text-decoration-color: var(--accent); }
.prose ul, .prose ol { margin: 0 0 1.3em; padding-left: 1.3em; }
.prose li { margin: 0 0 .5em; }
.prose blockquote { margin: 1.6em 0; padding: 4px 0 4px 24px; border-left: 3px solid var(--accent); font-family: "Instrument Serif", serif; font-size: 1.5rem; line-height: 1.35; color: var(--ink); font-style: italic; }
.prose .lead-cap::first-letter { font-family: "Instrument Serif", serif; font-size: 3.6rem; float: left; line-height: .8; padding: 6px 12px 0 0; color: var(--accent); }
.callout { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--r); padding: 26px 28px; margin: 2em 0; }
.callout .k { font-family: "Geist Mono", monospace; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.callout p:last-child { margin: 0; }

/* product CTA embedded in article */
.promo { border: 1px solid var(--line-2); border-radius: var(--r); padding: 30px; margin: 2.4em auto; max-width: var(--read); background: linear-gradient(180deg, #fff, var(--paper-2)); box-shadow: var(--shadow); }
.promo .tag { font-family: "Geist Mono", monospace; font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--gold); margin-bottom: 10px; }
.promo h3 { font-size: 1.7rem; margin: 0 0 .3em; }
.promo p { font-size: 1rem; color: var(--ink-soft); margin: 0 0 18px; }

/* ---------- tools page detail ---------- */
.tool { display: grid; grid-template-columns: 1fr; gap: 0; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; margin-bottom: 26px; background: var(--card); }
.tool-head { padding: 30px 30px 24px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; flex-wrap: wrap; }
.tool-head h2 { font-size: 2.2rem; margin: 0 0 .15em; }
.tool-head .dom { font-family: "Geist Mono", monospace; font-size: .82rem; color: var(--muted); }
.tool-body { padding: 26px 30px 30px; display: grid; grid-template-columns: 1.4fr 1fr; gap: 36px; }
.tool-body p { color: var(--ink-soft); }
.feat { list-style: none; margin: 0; padding: 0; }
.feat li { padding: 9px 0 9px 26px; border-bottom: 1px solid var(--line); position: relative; font-size: .96rem; color: var(--ink-soft); }
.feat li:last-child { border-bottom: 0; }
.feat li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-family: "Geist Mono", monospace; }
.best-for { font-family: "Geist Mono", monospace; font-size: .8rem; letter-spacing: .04em; color: var(--accent); text-transform: uppercase; margin-bottom: 14px; }

/* ---------- disclosure / footer ---------- */
.disclosure { background: var(--paper-2); border-top: 1px solid var(--line); }
.disclosure .wrap { padding: 30px 28px; }
.disclosure p { font-size: .92rem; color: var(--muted); margin: 0; max-width: 90ch; }
.disclosure strong { color: var(--ink-soft); }

.site-foot { border-top: 1px solid var(--line); padding: 56px 0 40px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; }
.foot-brand .serif { font-size: 1.6rem; }
.foot-brand p { color: var(--muted); font-size: .92rem; max-width: 32ch; margin-top: 10px; }
.foot-col h4 { font-family: "Geist Mono", monospace; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; font-weight: 500; }
.foot-col a { display: block; color: var(--ink-soft); font-size: .94rem; padding: 5px 0; }
.foot-col a:hover { color: var(--accent); }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line); flex-wrap: wrap; gap: 12px; }
.foot-bottom span { font-family: "Geist Mono", monospace; font-size: .78rem; color: var(--muted); }

/* ---------- misc ---------- */
.center { text-align: center; }
.section-title { display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: baseline; margin-bottom: 34px; }
.section-title h2 { margin: 0; }
.section-title .more { font-family: "Geist Mono", monospace; font-size: .82rem; color: var(--accent); justify-self: end; }
.back { font-family: "Geist Mono", monospace; font-size: .82rem; color: var(--muted); display: inline-flex; gap: 8px; margin-bottom: 28px; }
.back:hover { color: var(--accent); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  body { font-size: 16px; }
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .hero-aside { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; padding-top: 24px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .tool-body { grid-template-columns: 1fr; gap: 22px; }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .index-row { grid-template-columns: 1fr; gap: 8px; }
  .index-row .date { order: -1; }
  .pick { grid-template-columns: 40px 1fr; }
  .pick-go { display: none; }
  .pick-tag { grid-column: 2; justify-self: start; }
  section { padding: 60px 0; }
  .nav { display: none; }
  .nav.open { display: flex; position: absolute; top: 70px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); padding: 8px 28px 18px; }
  .nav.open a { padding: 12px 0; border-bottom: 1px solid var(--line); width: 100%; }
  .nav.open .cta { margin-top: 12px; text-align: center; }
  .menu-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border: 1px solid var(--line-2); border-radius: 9px; background: var(--card); cursor: pointer; font-size: 1.1rem; color: var(--ink); }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } html { scroll-behavior: auto; } }

/* page-load stagger */
.reveal { opacity: 0; transform: translateY(14px); animation: rise .7s cubic-bezier(.2,.7,.2,1) forwards; }
.reveal:nth-child(2) { animation-delay: .08s; }
.reveal:nth-child(3) { animation-delay: .16s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* a11y + footer heading fix (post-audit) */
.skip { position: absolute; left: -9999px; top: 0; background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 100; font-family: "Geist Mono", monospace; font-size: .85rem; }
.skip:focus { left: 0; color: #fff; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.foot-h { font-family: "Geist Mono", monospace; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; font-weight: 500; }
.index-row h2 { font-size: 1.7rem; line-height: 1.04; margin: 0 0 .25em; }
.index-row h2 a { color: var(--ink); }
.index-row:hover h2 a { color: var(--accent); }