/* BIGCMS public core — structural skeleton every theme skins via variables.
   Themes set: --bg --surface --ink --muted --brand --brand-ink --accent
   --line --radius --shadow --font-body --font-head (+ component overrides). */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#fbfbfd; --surface:#fff; --ink:#1d1d1f; --muted:#6e6e73;
  --brand:#0071e3; --brand-ink:#fff; --accent:#0071e3;
  --line:rgba(0,0,0,.09); --radius:14px; --shadow:0 2px 12px rgba(0,0,0,.05);
  --font-body:'Inter',system-ui,sans-serif; --font-head:var(--font-body);
  --wrap:1140px; --wrap-mid:860px; --wrap-narrow:720px;
}
body.site{font:16px/1.7 var(--font-body);background:var(--bg);color:var(--ink);
  -webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.15;letter-spacing:-.02em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.wrap-mid{max-width:var(--wrap-mid)}
.wrap-narrow{max-width:var(--wrap-narrow)}

.preview-badge{background:#0f1722;color:#cfd6df;font:600 12px var(--font-body);
  padding:6px 14px;text-align:center}
.preview-badge a{color:#7ce2b1}

.ribbon{background:var(--ink);color:#fff;text-align:center;padding:7px 14px;
  font:600 13px var(--font-body)}
.ribbon a{color:inherit}

/* header */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:50}
.header-row{display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:62px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.site-brand{font-family:var(--font-head);font-weight:800;font-size:21px;
  letter-spacing:-.03em;color:var(--ink);text-decoration:none}
.site-nav{display:flex;gap:4px;flex-wrap:wrap}
.site-nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:14px;
  padding:6px 11px;border-radius:8px}
.site-nav a:hover{background:var(--bg);color:var(--accent)}

/* mobile menu — hamburger opens a slide-in drawer.
   Themes restyle .site-nav a (several use light text on a dark header), so the
   drawer paints from its own two tokens and every theme sets them to match its
   header. */
:root{--drawer-bg:var(--surface);--drawer-ink:var(--ink);--drawer-line:var(--line)}
.nav-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;
  padding:0;border:1px solid var(--line);border-radius:11px;background:transparent;
  color:inherit;cursor:pointer;flex:none}
.nav-toggle-bars,.nav-toggle-bars::before,.nav-toggle-bars::after{display:block;
  width:19px;height:2px;background:currentColor;border-radius:2px;transition:transform .22s ease,opacity .18s ease}
.nav-toggle-bars{position:relative}
.nav-toggle-bars::before,.nav-toggle-bars::after{content:"";position:absolute;left:0}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

.drawer-scrim{position:fixed;inset:0;background:rgba(8,10,14,.5);opacity:0;
  transition:opacity .25s ease;z-index:80;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}
.drawer-scrim.is-open{opacity:1}
.site-drawer{position:fixed;top:0;right:0;height:100dvh;width:min(86vw,330px);z-index:90;
  background:var(--drawer-bg);color:var(--drawer-ink);
  border-left:1px solid var(--drawer-line);box-shadow:-18px 0 46px rgba(0,0,0,.28);
  transform:translateX(100%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;overflow-y:auto;overscroll-behavior:contain}
.site-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 18px;border-bottom:1px solid var(--drawer-line)}
.drawer-brand{font-family:var(--font-head);font-weight:800;font-size:17px;
  letter-spacing:-.02em;color:var(--drawer-ink)}
.drawer-close{width:38px;height:38px;flex:none;border:1px solid var(--drawer-line);
  border-radius:10px;background:transparent;color:var(--drawer-ink);font-size:24px;
  line-height:1;cursor:pointer}
.site-drawer .site-nav{display:flex;flex-direction:column;gap:2px;padding:12px}
.site-drawer .site-nav a{color:var(--drawer-ink);font-size:16px;padding:13px 14px;
  border-radius:10px;min-height:48px;display:flex;align-items:center}
.site-drawer .site-nav a:hover,.site-drawer .site-nav a:focus-visible{
  background:color-mix(in srgb,var(--drawer-ink) 10%,transparent);color:var(--drawer-ink)}
html.drawer-open{overflow:hidden}

@media(max-width:860px){
  .header-row{flex-wrap:nowrap;gap:12px}
  .site-header .header-row > .site-nav{display:none}   /* the drawer carries it */
  .nav-toggle{display:inline-flex}
}
@media(prefers-reduced-motion:reduce){
  .site-drawer,.drawer-scrim,.nav-toggle-bars,
  .nav-toggle-bars::before,.nav-toggle-bars::after{transition:none}
}

/* hero */
.hero{background:var(--brand);color:var(--brand-ink);padding:54px 0 58px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.hero-copy h1{font-size:clamp(2rem,4.6vw,3.3rem);margin:10px 0 14px}
.kicker{font-size:12px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;opacity:.85}
.lede{font-size:1.12rem;opacity:.92;max-width:560px}
.hero-art img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%}

/* home */
.home-intro{padding:34px 0 6px;max-width:var(--wrap-mid);font-size:1.05rem}
.home-intro p{margin-bottom:14px}
.eyebrow{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.13em;
  text-transform:uppercase;color:var(--accent);text-decoration:none}
.featured{margin:26px 0 8px}
.featured-card{display:grid;grid-template-columns:1.15fr .85fr;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  text-decoration:none;color:var(--ink);box-shadow:var(--shadow)}
.featured-media img{width:100%;height:100%;min-height:280px;object-fit:cover}
.featured-copy{padding:30px 32px;display:flex;flex-direction:column;gap:10px;justify-content:center}
.featured-copy h2{font-size:clamp(1.5rem,3vw,2.2rem)}
.featured-copy p{color:var(--muted)}
.read-more{font-weight:700;color:var(--accent)}
.featured-card:hover{transform:translateY(-2px);transition:transform .18s}

.section-block{margin:44px 0}
.section-head{display:flex;align-items:baseline;gap:16px;border-bottom:2px solid var(--ink);
  padding-bottom:10px;margin-bottom:22px;flex-wrap:wrap}
.section-head h2{font-size:1.7rem}
.section-head p{color:var(--muted);font-size:.95rem}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.story-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);
  display:flex;flex-direction:column;transition:transform .18s}
.story-card:hover{transform:translateY(-3px)}
.card-media img{aspect-ratio:3/2;object-fit:cover;width:100%}
.card-copy{padding:16px 18px 20px;display:flex;flex-direction:column;gap:7px}
.card-copy h3{font-size:1.18rem}
.card-copy p{color:var(--muted);font-size:.92rem}

/* article */
.article-head{padding:46px 0 24px}
.article-head h1{font-size:clamp(1.9rem,4.4vw,3rem);margin:12px 0 12px}
.dek{font-size:1.15rem;color:var(--muted);max-width:640px}
.byline{display:flex;gap:8px;color:var(--muted);font-size:.88rem;margin-top:14px}
.article-hero{margin:6px 0 10px}
.article-hero img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%}
.article-layout{padding:22px 0 70px}

.tldr,.toc{border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);padding:18px 22px;margin:0 0 20px;box-shadow:var(--shadow)}
.box-title{font-size:.8rem;font-weight:800;letter-spacing:.11em;text-transform:uppercase;
  color:var(--accent);margin-bottom:10px}
.tldr ul{margin-left:20px}
.tldr li{margin-bottom:6px}
.toc ol{margin-left:22px;columns:2;column-gap:34px}
.toc li{margin-bottom:6px;break-inside:avoid}
.toc a{color:var(--ink);text-decoration:none;font-weight:600;font-size:.95rem}
.toc a:hover{color:var(--accent)}
@media(max-width:640px){.toc ol{columns:1}}

.article-body{font-size:1.05rem}
.article-body h2{font-size:1.6rem;margin:38px 0 14px;scroll-margin-top:80px}
.article-body h3{font-size:1.2rem;margin:26px 0 10px}
.article-body p{margin-bottom:16px}
.article-body ul,.article-body ol{margin:0 0 16px 24px}
.article-body li{margin-bottom:7px}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;
  background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;
  font-size:.95rem}
.article-body th{background:var(--ink);color:var(--bg);text-align:left;
  padding:10px 12px;font-size:.82rem;letter-spacing:.05em;text-transform:uppercase}
.article-body td{padding:10px 12px;border-top:1px solid var(--line)}
.article-body tr:nth-child(even) td{background:color-mix(in srgb, var(--surface) 60%, var(--bg))}
.table-scroll{overflow-x:auto}

/* charts */
.chart{margin:24px 0;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:16px 14px 10px;box-shadow:var(--shadow)}
.chart svg{width:100%;height:auto;display:block}
.chart-grid{stroke:var(--line);stroke-width:1}
.chart-bar{fill:var(--accent)}
.chart-line{stroke:var(--accent);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.chart-area{fill:var(--accent);opacity:.12}
.chart-dot{fill:var(--accent)}
.chart-label{font:11.5px var(--font-body);fill:var(--muted)}
.chart-value{font:700 12px var(--font-body);fill:var(--ink)}
.chart figcaption{font-size:.85rem;color:var(--muted);padding:8px 6px 4px;text-align:center}

/* promo */
.promo{display:flex;flex-direction:column;gap:4px;border:1px solid var(--line);
  border-left:4px solid var(--accent);border-radius:10px;background:var(--surface);
  padding:14px 18px;margin:26px 0;box-shadow:var(--shadow)}
.promo-kicker{font-size:.72rem;font-weight:800;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted)}
.promo a{font-weight:700;color:var(--accent);font-size:1.02rem}

/* faq */
.faq{margin:44px 0 10px}
.faq-title{font-size:1.5rem;margin-bottom:16px}
.faq details{border:1px solid var(--line);border-radius:10px;background:var(--surface);
  margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;padding:14px 18px;font-weight:700;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.2rem;color:var(--accent);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq-answer{padding:0 18px 15px;color:var(--muted)}

/* read next */
.read-next{margin:40px 0 0}
.read-next-card{display:grid;grid-template-columns:150px 1fr;gap:18px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 20px;margin-top:10px;text-decoration:none;color:var(--ink);
  box-shadow:var(--shadow);transition:transform .18s}
.read-next-card:hover{transform:translateY(-2px)}
.read-next-card img{border-radius:8px;aspect-ratio:3/2;object-fit:cover}
.read-next-card h3{font-size:1.2rem;margin-bottom:5px}
.read-next-card p{color:var(--muted);font-size:.92rem}
@media(max-width:560px){.read-next-card{grid-template-columns:1fr}}

/* forms & calculators */
.contact{display:grid;gap:14px;max-width:480px;margin:18px 0}
.contact label{display:flex;flex-direction:column;gap:6px;font-weight:700;font-size:.9rem}
.contact input,.contact textarea,.calc input,.calc select{font:1rem var(--font-body);
  padding:10px 13px;border:1.5px solid var(--line);border-radius:9px;background:var(--surface);
  color:var(--ink)}
.contact input:focus,.contact textarea:focus,.calc input:focus,.calc select:focus{
  outline:none;border-color:var(--accent)}
.contact button,.calc button{background:var(--accent);color:var(--brand-ink);border:0;
  border-radius:9px;padding:12px 22px;font:700 1rem var(--font-body);cursor:pointer;
  transition:transform .15s}
.contact button:hover,.calc button:hover{transform:translateY(-1px)}
.hp{position:absolute;left:-9999px;height:0;width:0;overflow:hidden}
.contact-sent{display:none;color:var(--accent);font-weight:700}
body.sent .contact-sent{display:block}
.calc{border:1.5px solid var(--line);border-radius:var(--radius);background:var(--surface);
  padding:22px 24px;margin:26px 0;box-shadow:var(--shadow)}
.calc form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.calc label{display:flex;flex-direction:column;gap:6px;font-weight:700;font-size:.88rem}
.calc .calc-actions{grid-column:span 2}
.calc .calc-result{grid-column:span 2;border-top:1.5px solid var(--line);padding-top:14px;
  font-size:1.05rem}
.calc .calc-result b,.calc .calc-result span{color:var(--accent);font-weight:800}
@media(max-width:560px){.calc form{grid-template-columns:1fr}.calc .calc-actions,.calc .calc-result{grid-column:span 1}}

/* footer */
.site-footer{background:var(--ink);color:color-mix(in srgb, var(--bg) 78%, transparent);
  margin-top:70px;padding:46px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.site-footer .site-brand{color:var(--bg);font-size:19px}
.site-footer h4{color:var(--bg);font-size:.82rem;letter-spacing:.1em;
  text-transform:uppercase;margin-bottom:12px}
.site-footer a{display:block;color:color-mix(in srgb, var(--bg) 72%, transparent);
  text-decoration:none;margin-bottom:8px;font-size:.92rem}
.site-footer a:hover{color:var(--bg)}
.footer-note{font-size:.82rem;opacity:.7;margin-top:10px;max-width:300px}
.footer-legal{border-top:1px solid color-mix(in srgb, var(--bg) 14%, transparent);
  margin-top:34px;padding-top:18px;font-size:.82rem;opacity:.65}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}

@media(max-width:860px){
  .hero-grid,.featured-card{grid-template-columns:1fr}
  .featured-media img{min-height:200px}
}