/* Shared styles for content pages (glossary, calculators, guides, courses); same tokens as index.html */
:root{
  --bg:#FFFFFF; --subtle:#F7F8FA; --subtle-2:#EEF1F5; --line:#E4E7EC; --line-2:#D0D5DD;
  --text:#101828; --text-2:#344054; --muted:#667085;
  --blue:#2451E6; --blue-hover:#1C43C7; --blue-soft:#EEF2FE; --blue-ink:#1A3DB3;
  --green:#067647; --green-soft:#ECFDF3; --slate:#0C111D;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text-2);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;font-feature-settings:"cv11","ss01"}
a{color:var(--blue)}
img{max-width:100%}

/* header */
.top{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:10}
.top .in{max-width:1200px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.02em;color:var(--text);text-decoration:none}
.brand svg{width:28px;height:28px}
.top nav{display:flex;align-items:center;gap:22px}
.top nav a{font-size:15px;color:var(--text-2);text-decoration:none}
.top nav a:hover{color:var(--blue)}
.top nav a[aria-current]{color:var(--text);font-weight:600}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;border-radius:10px;padding:10px 16px;text-decoration:none;transition:background .15s}
.btn-primary{background:var(--blue);color:#fff!important}
.btn-primary:hover{background:var(--blue-hover)}
.btn-secondary{background:#fff;color:var(--text)!important;border:1px solid var(--line-2)}
@media (max-width:760px){.top nav a.hide-sm{display:none}.top nav{gap:14px}}

/* layout */
.page{max-width:760px;margin:0 auto;padding:40px 24px 72px}
.page.wide{max-width:1040px}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:18px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--blue)}
.kicker{font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
h1{font-size:clamp(32px,5vw,46px);line-height:1.12;letter-spacing:-.03em;color:var(--text);font-weight:700;margin-bottom:14px;text-wrap:balance}
.lead{font-size:19px;color:var(--text-2);margin-bottom:10px}
.meta{font-size:14px;color:var(--muted);margin-bottom:28px}
.prose h2{font-size:26px;letter-spacing:-.02em;color:var(--text);font-weight:700;margin:40px 0 12px;line-height:1.25}
.prose h3{font-size:19px;color:var(--text);font-weight:600;margin:26px 0 8px}
.prose p,.prose ul,.prose ol{margin-bottom:16px}
.prose ul,.prose ol{padding-left:24px}
.prose li{margin-bottom:6px}
.prose strong{color:var(--text)}
.prose code{font-family:var(--mono);font-size:.92em;background:var(--subtle-2);padding:1px 6px;border-radius:5px}
.prose blockquote{border-left:3px solid var(--blue);background:var(--blue-soft);border-radius:0 12px 12px 0;padding:14px 18px;color:var(--text);margin:20px 0}
.prose blockquote p:last-child{margin-bottom:0}
.prose table{width:100%;border-collapse:separate;border-spacing:0;margin:8px 0 22px;font-size:15.5px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.prose th,.prose td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.prose tr:last-child td{border-bottom:0}
.prose th{background:var(--subtle);color:var(--text);font-weight:600}
.table-wrap{overflow-x:auto}

/* definition box (the sentence AI answers quote) */
.definition{border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:12px;padding:18px 20px;margin:6px 0 28px;font-size:18px;color:var(--text);background:#fff}
.definition b{display:block;font-size:13px;font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--blue);margin-bottom:4px}
.formula{font-family:var(--mono);font-size:17px;background:var(--subtle);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:8px 0 20px;color:var(--text);overflow-x:auto}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{cursor:pointer;font-weight:600;color:var(--text);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--muted)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:8px 0 0}

/* call to action */
.cta{margin:44px 0 0;border-radius:16px;background:var(--slate);color:#F2F4F7;padding:28px;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}
.cta h2{font-size:22px;color:#fff;margin:0 0 6px;letter-spacing:-.02em}
.cta p{color:#C9D3EA;margin:0;font-size:16px}
@media (max-width:640px){.cta{grid-template-columns:1fr}}

/* related + hub lists */
.related{margin-top:36px;padding-top:20px;border-top:1px solid var(--line)}
.related h2{font-size:18px;margin:0 0 10px;color:var(--text)}
.related ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.related a{display:inline-block;border:1px solid var(--line-2);border-radius:99px;padding:5px 14px;font-size:15px;text-decoration:none;color:var(--text-2)}
.hub{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;margin-top:20px}
.hub a{display:block;border:1px solid var(--line);border-radius:14px;padding:18px;text-decoration:none;color:var(--text-2);transition:border-color .15s,box-shadow .15s}
.hub a:hover{border-color:var(--blue);box-shadow:0 4px 16px rgba(16,24,40,.06)}
.hub b{display:block;color:var(--text);font-size:17px;margin-bottom:4px}
.hub span{font-size:15px}

/* calculators */
.calc{border:1px solid var(--line);border-radius:16px;padding:22px;margin:8px 0 28px;background:var(--subtle)}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.calc .row{grid-template-columns:1fr}}
.calc label{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px}
.calc input,.calc select{width:100%;font:inherit;font-size:16px;padding:10px 12px;border:1px solid var(--line-2);border-radius:10px;background:#fff;color:var(--text)}
.calc input:focus,.calc select:focus{outline:2px solid var(--blue);outline-offset:1px}
.calc .hint{font-size:13px;color:var(--muted);margin-top:4px}
.result{margin-top:18px;border-radius:12px;background:#fff;border:1px solid var(--line);padding:16px 18px}
.result .big{font-size:30px;font-weight:700;color:var(--text);letter-spacing:-.02em}
.result .ok{color:var(--green)}
.result .warn{color:#B42318}

/* footer */
footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer .in{max-width:1200px;margin:0 auto;padding:28px 24px 40px;display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
footer a{color:var(--muted);text-decoration:none;margin-right:16px}
footer a:hover{color:var(--blue)}