/* Shafi Library (Learn) — server-rendered pages.
   Consolidated from the design handoff (learn.html + health-answer.html) with
   added styles for the answers/articles index (search, filter, pagination). */
:root{
  --navy:#264A6C; --navy-deep:#15304C; --teal-mid:#0C7A91; --teal:#00A8CD; --teal-lift:#2FBCDD;
  --white:#FFFFFF; --mist:#F4F8FA; --teal-tint:#E9F4F7; --ink:#35373B; --ink-soft:#646A70;
  --line:#E5EBEF; --white-78:rgba(255,255,255,.80); --white-58:rgba(255,255,255,.60); --maxw:1180px;
  --font-display:"Fraunces",Georgia,serif; --font-body:"IBM Plex Sans",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased;line-height:1.6}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.narrow{max-width:740px;margin:0 auto;padding:0 28px}
.eyebrow{font-family:var(--font-mono);font-weight:500;font-size:12px;letter-spacing:.2em;text-transform:uppercase}

/* NAV */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none}
.logo-img{height:52px;width:auto;display:block}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{color:var(--navy);text-decoration:none;font-size:14.5px;font-weight:500;opacity:.85}
.nav-links a:hover{opacity:1}
.nav-links a.active{opacity:1;color:var(--teal-mid)}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-body);font-weight:600;font-size:14.5px;
  text-decoration:none;border-radius:999px;padding:12px 24px;border:1.5px solid transparent;cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 22px -10px rgba(0,168,205,.65)}
.btn-primary:hover{background:var(--teal-mid);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--navy);border-color:#cdd8e1}
.btn-outline:hover{border-color:var(--navy);background:var(--teal-tint)}
.btn-on-teal{background:#fff;color:var(--teal-mid)}
.btn-on-teal:hover{transform:translateY(-2px);box-shadow:0 14px 30px -12px rgba(0,0,0,.25)}
.nav .btn{padding:10px 20px}
.lang-switch{font-size:13px;font-weight:500;color:var(--navy);text-decoration:none;border:1px solid #cdd8e1;border-radius:999px;padding:7px 13px;opacity:.9;white-space:nowrap}
.lang-switch:hover{opacity:1;border-color:var(--navy)}
.nav-toggle{display:none}

/* PAGE HEAD */
.head{position:relative;background:var(--white);overflow:hidden;padding:84px 0 56px}
.head::before{content:"";position:absolute;top:-180px;right:-150px;width:600px;height:600px;
  background:radial-gradient(circle,rgba(0,168,205,.13) 0%,transparent 68%);pointer-events:none}
.head .wrap{position:relative;z-index:2}
.head .eyebrow{color:var(--teal-mid);margin-bottom:18px}
.head h1{font-family:var(--font-display);font-weight:500;font-size:clamp(34px,4.6vw,54px);line-height:1.06;
  letter-spacing:-.02em;color:var(--navy);margin-bottom:18px;max-width:18ch}
.head p{font-size:18px;color:var(--ink-soft);max-width:62ch}

.sec{padding:30px 0 70px}

/* TWO SURFACES (hub) */
.surfaces{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.surface{border:1px solid var(--line);border-radius:22px;padding:34px;background:#fff;display:flex;flex-direction:column;
  transition:transform .18s ease, box-shadow .18s ease}
.surface:hover{transform:translateY(-3px);box-shadow:0 18px 40px -24px rgba(21,48,76,.35)}
.surface .stag{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--teal-mid);margin-bottom:16px}
.surface .ico{width:46px;height:46px;margin-bottom:14px}
.surface h2{font-family:var(--font-display);font-weight:500;font-size:26px;color:var(--navy);letter-spacing:-.01em;margin-bottom:10px}
.surface p{font-size:15.5px;color:var(--ink-soft);margin-bottom:22px;flex:1}
.surface .links{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.surface .links a{color:var(--teal-mid);font-weight:600;font-size:15px;text-decoration:none}
.surface .links a:hover{text-decoration:underline}

/* DIFFERENTIATION BAND */
.diff{background:var(--teal-tint)}
.diff .wrap{padding:64px 28px;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.diff .eyebrow{color:var(--teal-mid);margin-bottom:14px}
.diff h2{font-family:var(--font-display);font-weight:500;font-size:clamp(24px,3vw,34px);line-height:1.14;color:var(--navy);letter-spacing:-.015em;margin-bottom:14px}
.diff p{font-size:16px;color:var(--ink-soft);max-width:54ch}
.diff .cta-side{text-align:start}
.diff .cta-side .lead{font-size:15px;color:var(--ink);margin-bottom:16px;font-weight:500}

/* TOPICS */
.topics{padding:64px 0 30px}
.topics .eyebrow{color:var(--teal-mid);margin-bottom:16px}
.topics h2{font-family:var(--font-display);font-weight:500;font-size:28px;color:var(--navy);margin-bottom:22px;letter-spacing:-.01em}
.pillrow{display:flex;flex-wrap:wrap;gap:12px}
.pill{display:inline-flex;align-items:center;border:1px solid #cdd8e1;border-radius:999px;padding:9px 18px;
  font-size:14px;color:var(--navy);text-decoration:none;background:#fff;transition:all .15s ease}
.pill:hover{border-color:var(--teal);color:var(--teal-mid);background:var(--teal-tint)}
.pill.active{border-color:var(--teal);color:#fff;background:var(--teal-mid)}

/* RECENT / LIST */
.recent{padding:30px 0 80px}
.recent .head-row{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:22px;flex-wrap:wrap;gap:10px}
.recent .eyebrow{color:var(--teal-mid)}
.recent h2{font-family:var(--font-display);font-weight:500;font-size:28px;color:var(--navy);letter-spacing:-.01em}
.recent .seeall{color:var(--teal-mid);font-weight:600;font-size:14.5px;text-decoration:none}
.qlist{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.qrow{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:22px 4px;border-bottom:1px solid var(--line);
  text-decoration:none;transition:background .15s ease}
.qrow:hover{background:var(--mist)}
.qrow .q{font-family:var(--font-display);font-size:19px;color:var(--navy);font-weight:500;letter-spacing:-.01em;margin-bottom:6px;line-height:1.25}
.qrow .meta{font-size:13px;color:var(--ink-soft)}
.qrow .topic{flex:0 0 auto;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--teal-mid);border:1px solid var(--teal-tint);background:var(--teal-tint);border-radius:999px;padding:6px 12px}

/* SEARCH + FILTER (index pages) */
.toolbar{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;margin-bottom:26px}
.search-form{display:flex;gap:10px;flex:1;min-width:260px;max-width:480px}
.search-form input{flex:1;font-family:var(--font-body);font-size:15px;color:var(--ink);
  border:1px solid #cdd8e1;border-radius:999px;padding:11px 18px;background:#fff;outline:none}
.search-form input:focus{border-color:var(--teal)}
.search-form button{font-family:var(--font-body);font-weight:600;font-size:14px;color:#fff;background:var(--teal);
  border:none;border-radius:999px;padding:11px 22px;cursor:pointer}
.search-form button:hover{background:var(--teal-mid)}
.empty{padding:40px 4px;color:var(--ink-soft);font-size:16px;border-top:1px solid var(--line)}

/* PAGINATION */
.pager{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:34px;flex-wrap:wrap}
.pager .page-info{font-size:14px;color:var(--ink-soft);font-family:var(--font-mono);letter-spacing:.06em}
.pager a,.pager span.disabled{font-size:14px;font-weight:600;text-decoration:none;border-radius:999px;padding:10px 18px;border:1px solid #cdd8e1}
.pager a{color:var(--navy)}
.pager a:hover{border-color:var(--teal);color:var(--teal-mid);background:var(--teal-tint)}
.pager span.disabled{color:#aab4bd;border-color:var(--line2,#eef2f5)}

/* CARD GRID (articles index) */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.acard{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;text-decoration:none;display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease}
.acard:hover{transform:translateY(-3px);box-shadow:0 18px 40px -24px rgba(21,48,76,.35)}
.acard .cover{aspect-ratio:16/9;width:100%;object-fit:cover;background:linear-gradient(155deg,#EAF5F8,#D7EAF0)}
.acard .body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.acard .k{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-mid)}
.acard .t{font-family:var(--font-display);font-size:19px;color:var(--navy);font-weight:500;line-height:1.25;letter-spacing:-.01em}
.acard .ex{font-size:14px;color:var(--ink-soft);flex:1}

/* ARTICLE / ANSWER DETAIL */
.article{padding:48px 0 70px}
.crumb{font-size:13px;color:var(--ink-soft);margin-bottom:22px}
.crumb a{color:var(--teal-mid);text-decoration:none}
.crumb a:hover{text-decoration:underline}
.topic-tag{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--teal-mid);background:var(--teal-tint);border-radius:999px;padding:6px 13px;margin-bottom:18px}
.article h1{font-family:var(--font-display);font-weight:500;font-size:clamp(28px,3.8vw,42px);line-height:1.12;
  letter-spacing:-.02em;color:var(--navy);margin-bottom:24px}
.cover-hero{width:100%;aspect-ratio:16/8;object-fit:cover;border-radius:18px;background:linear-gradient(155deg,#EAF5F8,#D7EAF0);margin-bottom:26px}
.byline{display:flex;align-items:center;gap:14px;padding:16px 0 22px;border-bottom:1px solid var(--line);margin-bottom:30px}
.byline img{width:54px;height:54px;border-radius:50%;object-fit:cover;background:#cfe6ec}
.byline a{text-decoration:none}
.byline .who{font-size:15px;color:var(--navy);font-weight:600}
.byline .cred{font-size:13px;color:var(--ink-soft)}
.byline .date{margin-inline-start:auto;font-size:13px;color:var(--ink-soft);text-align:end}

.answer-body{font-size:17px;color:var(--ink);line-height:1.75}
.answer-body p{margin-bottom:18px}
.answer-body h2{font-family:var(--font-display);font-weight:500;font-size:23px;color:var(--navy);margin:30px 0 12px;letter-spacing:-.01em}
.answer-body h3{font-family:var(--font-display);font-weight:500;font-size:20px;color:var(--navy);margin:24px 0 10px;letter-spacing:-.01em}
.answer-body h4{font-family:var(--font-display);font-weight:500;font-size:18px;color:var(--navy);margin:20px 0 8px}
.answer-body ul,.answer-body ol{margin:0 0 18px;padding-inline-start:0;list-style:none}
.answer-body ol{counter-reset:ol}
.answer-body li{position:relative;padding-inline-start:24px;margin-bottom:10px}
.answer-body ul>li::before{content:"";position:absolute;inset-inline-start:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--teal)}
.answer-body ol>li{counter-increment:ol}
.answer-body ol>li::before{content:counter(ol)".";position:absolute;inset-inline-start:0;top:0;color:var(--teal-mid);font-weight:600}
.answer-body a{color:var(--teal-mid);text-decoration:underline}
.answer-body strong,.answer-body b{font-weight:600;color:var(--ink)}
.answer-body blockquote{border-inline-start:3px solid var(--teal);background:var(--mist);padding:14px 18px;margin:0 0 18px;border-radius:0 12px 12px 0;color:var(--ink-soft)}
.answer-body img{max-width:100%;height:auto;border-radius:14px;margin:8px 0 20px}
.answer-body figure{margin:0 0 20px}
.answer-body figcaption{font-size:13px;color:var(--ink-soft);margin-top:6px;text-align:center}
.answer-body hr{border:none;border-top:1px solid var(--line);margin:26px 0}

/* SOFT CONVERSION */
.convert{margin:34px 0;background:var(--teal-tint);border:1px solid #d4e8ee;border-radius:18px;padding:26px 28px}
.convert .lbl{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-mid);margin-bottom:10px}
.convert p{font-size:15.5px;color:var(--ink);margin-bottom:16px;max-width:60ch}
.convert .btn{padding:11px 22px}

.disclaimer{font-size:13.5px;color:var(--ink-soft);background:var(--mist);border-radius:14px;padding:18px 20px;margin-top:30px;line-height:1.6}

/* RELATED */
.related{background:var(--mist);padding:60px 0}
.related h2{font-family:var(--font-display);font-weight:500;font-size:24px;color:var(--navy);margin-bottom:22px;letter-spacing:-.01em}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.rel-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;text-decoration:none;display:block;transition:transform .15s ease,box-shadow .15s ease}
.rel-card:hover{transform:translateY(-2px);box-shadow:0 14px 30px -22px rgba(21,48,76,.4)}
.rel-card .k{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-mid);margin-bottom:8px;display:block}
.rel-card .t{font-family:var(--font-display);font-size:18px;color:var(--navy);font-weight:500;line-height:1.25;letter-spacing:-.01em}

/* CTA */
.cta{background:linear-gradient(135deg,var(--teal-mid) 0%,var(--teal) 100%);color:#fff;text-align:center;padding:80px 0;position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 120%,rgba(255,255,255,.18),transparent 60%);pointer-events:none}
.cta .wrap{position:relative;z-index:2}
.cta .eyebrow{color:rgba(255,255,255,.85);margin-bottom:16px}
.cta h2{font-family:var(--font-display);font-weight:500;font-size:clamp(26px,3.4vw,40px);line-height:1.08;letter-spacing:-.02em;margin-bottom:12px}
.cta p{color:var(--white-78);font-size:16px;max-width:54ch;margin:0 auto 14px}
.cta .fineprint{color:rgba(255,255,255,.62);font-size:13.5px;max-width:52ch;margin:0 auto 26px}
.cta .btn-big{font-size:16px;padding:15px 32px}

/* NOT FOUND */
.notfound{padding:90px 0 80px;text-align:center}
.notfound h1{font-family:var(--font-display);font-weight:500;font-size:clamp(28px,3.6vw,40px);color:var(--navy);margin-bottom:14px;letter-spacing:-.02em}
.notfound p{font-size:17px;color:var(--ink-soft);max-width:52ch;margin:0 auto 26px}

/* FOOTER */
footer{background:var(--navy-deep);color:var(--white-58);padding:54px 0 40px;font-size:14px}
.foot-top{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12)}
.foot-brand .mark{font-family:var(--font-display);font-size:21px;color:#fff;font-weight:600}
.foot-brand p{max-width:34ch;margin-top:10px;line-height:1.55}
.foot-cols{display:flex;gap:56px;flex-wrap:wrap}
.foot-col h4{font-family:var(--font-mono);font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--white-78);margin-bottom:14px;font-weight:500}
.foot-col a{display:block;color:var(--white-58);text-decoration:none;margin-bottom:9px}
.foot-col a:hover{color:#fff}
.foot-bottom{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-top:24px;font-size:13px}
.notice{color:var(--teal-lift)}

/* REVEAL */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1;transform:none}

@media (max-width:900px){
  .card-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .surfaces{grid-template-columns:1fr} .diff .wrap{grid-template-columns:1fr;gap:24px}
  .rel-grid{grid-template-columns:1fr}
  .byline .date{display:none}
  .card-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;background:#fff;padding:20px 28px;border-bottom:1px solid var(--line);gap:18px}
  .nav-toggle{display:inline-flex;background:none;border:1.5px solid #cdd8e1;color:var(--navy);border-radius:8px;padding:8px 12px;font-size:14px;font-family:var(--font-body)}
}
@media (prefers-reduced-motion:reduce){ .reveal{opacity:1;transform:none;transition:none} html{scroll-behavior:auto} }