/* =====================================================================
   Compositing Academy: shared site chrome (navigation bar + footer)
   Used by every rebuilt page. Markup lives in shared/nav.html and
   shared/footer.html and is copied into pages by shared/sync_chrome.py.
   Everything is namespaced .ca-* so it never clashes with page styles.
   ===================================================================== */
:root{
  --ca-blue:#3492eb; --ca-blue-hi:#5fb0ff; --ca-bg:#04070c; --ca-panel:#0a1019; --ca-panel2:#0e1724;
  --ca-line:#1a2636; --ca-text:#f2f6fa; --ca-muted:#93a4b8; --ca-good:#5fd394; --ca-nav-h:72px;
}

/* ---------- top bar ---------- */
.ca-nav{position:sticky;top:0;z-index:100;border-bottom:1px solid var(--ca-line);font-family:Inter,system-ui,sans-serif}
/* bar background on a pseudo-element (a filter/backdrop-filter on .ca-nav itself would trap the fixed phone drawer). No backdrop blur: it re-blurs every video frame and scroll step under the bar, which made pages with hero videos lag. */
.ca-nav::before{content:"";position:absolute;inset:0;z-index:-1;background:rgba(4,7,12,.94)}
.ca-nav-in{max-width:1320px;margin:0 auto;height:var(--ca-nav-h);display:flex;align-items:center;gap:28px;padding:0 24px}
.ca-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ca-text);flex:none}
.ca-brand img{width:40px;height:auto;mix-blend-mode:screen;display:block}
.ca-brand span{font:700 21px/1 "Barlow Condensed",sans-serif;letter-spacing:.06em;text-transform:uppercase}
.ca-brand span b{color:var(--ca-blue-hi);font-weight:700}
.ca-links{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}
.ca-links>a,.ca-dd-btn{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;border-radius:999px;color:#d6e0ea;text-decoration:none;font:600 15px/1 Inter,system-ui,sans-serif;background:none;border:0;cursor:pointer;transition:background .2s,color .2s}
.ca-links>a:hover,.ca-dd-btn:hover,.ca-dd.open .ca-dd-btn{background:rgba(95,176,255,.1);color:#fff}
.ca-links>a[aria-current="page"],.ca-dd-btn[aria-current="page"]{color:#fff;box-shadow:inset 0 -2px 0 var(--ca-blue)}
.ca-ext svg{width:12px;height:12px;opacity:.6}
.ca-dd-btn svg{width:12px;height:12px;transition:transform .2s}
.ca-dd.open .ca-dd-btn svg{transform:rotate(180deg)}
.ca-nav-cta{flex:none;display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;background:var(--ca-blue);color:#fff;text-decoration:none;font:700 15px/1 Inter,system-ui,sans-serif;box-shadow:0 8px 24px rgba(52,146,235,.35);transition:background .2s,transform .2s}
.ca-nav-cta:hover{background:var(--ca-blue-hi);transform:translateY(-1px)}
.ca-nav-cta img{width:20px;height:auto}
.ca-burger{display:none;flex:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--ca-line);background:var(--ca-panel);color:#fff;cursor:pointer;place-items:center}
.ca-burger svg{width:22px;height:22px}

/* ---------- Courses mega menu ---------- */
.ca-dd{position:relative}
.ca-mega{position:absolute;left:50%;top:calc(100% + 14px);transform:translate(-50%,8px);width:min(980px,calc(100vw - 48px));display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:10px;padding:14px;border-radius:20px;background:#0a121d;border:1px solid rgba(95,176,255,.22);box-shadow:0 30px 80px rgba(0,0,0,.6);opacity:0;visibility:hidden;transition:opacity .18s,transform .18s,visibility 0s linear .18s}
.ca-mega::before{content:"";position:absolute;left:0;right:0;top:-16px;height:16px}
.ca-dd.open .ca-mega{opacity:1;visibility:visible;transform:translate(-50%,0);transition:opacity .18s,transform .18s}
.ca-mega h4{margin:6px 10px 8px;font:800 12px/1 Inter,system-ui,sans-serif;letter-spacing:.16em;text-transform:uppercase;color:var(--ca-muted)}
.ca-mega h4 i{font-style:normal;display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:8px;background:var(--c,var(--ca-blue));vertical-align:1px}
.ca-col{padding:6px;border-radius:14px}
.ca-col.studio{--c:var(--ca-good)}
.ca-col.maker{--c:var(--ca-blue-hi)}
.ca-start{display:block;height:100%;border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ca-text);background:var(--ca-panel2);border:1px solid rgba(95,176,255,.35);transition:border-color .2s}
.ca-start:hover{border-color:var(--ca-blue-hi)}
.ca-start img{display:block;width:100%;aspect-ratio:16/8;object-fit:cover}
.ca-start div{padding:14px 16px 16px}
.ca-start small{display:block;font:800 11px/1 Inter,system-ui,sans-serif;letter-spacing:.16em;text-transform:uppercase;color:var(--ca-blue-hi)}
.ca-start strong{display:block;margin-top:8px;font:700 24px/1.05 "Barlow Condensed",sans-serif;text-transform:uppercase;letter-spacing:.02em}
.ca-start span{display:block;margin-top:6px;font-size:14px;color:var(--ca-muted)}
.ca-start em{font-style:normal;color:#fff;font-weight:700}
.ca-item{display:flex;align-items:center;gap:12px;padding:8px 10px;border-radius:12px;text-decoration:none;color:var(--ca-text);transition:background .15s}
.ca-item:hover{background:rgba(95,176,255,.08)}
.ca-item img{width:52px;height:40px;object-fit:cover;border-radius:8px;flex:none;background:#000}
.ca-item b{display:block;font:600 14px/1.25 Inter,system-ui,sans-serif}
.ca-item small{display:block;margin-top:2px;font-size:12.5px;color:var(--ca-muted)}
.ca-new{display:inline-block;margin-left:6px;padding:2px 7px;border-radius:999px;background:var(--ca-blue);color:#fff;font:800 10px/1.4 Inter,system-ui,sans-serif;letter-spacing:.06em;vertical-align:1px}
.ca-cat{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 12px 12px 18px;border-radius:14px;background:rgba(52,146,235,.1);border:1px solid rgba(95,176,255,.25)}
.ca-cat p{margin:0;font:400 14.5px/1.4 Inter,system-ui,sans-serif;color:var(--ca-muted)}
.ca-cat p b{color:#fff;font-weight:600}
.ca-cat-btn{flex:none;display:inline-flex;align-items:center;gap:10px;height:48px;padding:0 24px;border-radius:12px;background:var(--ca-blue);color:#fff;text-decoration:none;font:700 16px/1 Inter,system-ui,sans-serif;box-shadow:0 8px 22px -8px rgba(52,146,235,.8);transition:background .2s,transform .2s}
.ca-cat-btn:hover{background:#4aa3f5;transform:translateY(-1px)}
.ca-cat-btn span{transition:transform .2s}
.ca-cat-btn:hover span{transform:translateX(3px)}

/* ---------- responsive: drawer menu ---------- */
.ca-links>a,.ca-dd-btn{white-space:nowrap}
@media (min-width:901px) and (max-width:1040px){.ca-brand span{display:none}.ca-links>a,.ca-dd-btn{padding:0 9px}}
@media (max-width:1100px){
  .ca-links>a,.ca-dd-btn{padding:0 10px;font-size:14px}
  .ca-brand span{display:none}
}
@media (max-width:900px){
  :root{--ca-nav-h:64px}
  .ca-nav-in{gap:12px;padding:0 16px}
  .ca-brand span{display:inline}
  .ca-burger{display:grid;margin-left:auto}
  .ca-nav-cta{height:40px;padding:0 14px;font-size:14px}
  .ca-nav-cta img{display:none}
  .ca-links{position:fixed;left:0;right:0;top:var(--ca-drawer-top,var(--ca-nav-h));bottom:0;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;padding:8px 16px 40px;background:var(--ca-bg);overflow-y:auto;transform:translateX(100%);transition:transform .25s ease;visibility:hidden}
  .ca-nav.open .ca-links{transform:none;visibility:visible}
  .ca-links>a,.ca-dd-btn{height:56px;width:100%;justify-content:space-between;padding:0 6px;border-radius:0;border-bottom:1px solid var(--ca-line);font-size:17px}
  .ca-links>a:hover,.ca-dd-btn:hover,.ca-dd.open .ca-dd-btn{background:none}
  .ca-links>a[aria-current="page"],.ca-dd-btn[aria-current="page"]{box-shadow:none;color:var(--ca-blue-hi)}
  .ca-mega,.ca-dd.open .ca-mega{display:none}
  .ca-dd-btn svg{display:none}
  .ca-mega::before{display:none}
  .ca-start img{aspect-ratio:16/7}
  body.ca-lock{overflow:hidden}
}
@media (max-width:440px){
  .ca-nav-in{gap:8px;padding:0 12px}
  .ca-brand{gap:8px}
  .ca-brand img{width:32px}
  .ca-brand span{font-size:16px;letter-spacing:.04em}
  .ca-nav-cta{height:38px;padding:0 12px;font-size:13px}
  .ca-burger{width:40px;height:40px}
}
@media (max-width:350px){.ca-brand span{display:none}}

/* ---------- footer ---------- */
.ca-foot{background:#03060a;border-top:1px solid var(--ca-line);color:var(--ca-muted);font:400 15px/1.6 Inter,system-ui,sans-serif;padding:56px 0 34px}
.ca-foot-in{max-width:1320px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:36px}
.ca-foot .ca-brand{margin-bottom:14px}
.ca-foot p{margin:0;max-width:34ch}
.ca-foot h5{margin:4px 0 14px;font:800 12px/1 Inter,system-ui,sans-serif;letter-spacing:.16em;text-transform:uppercase;color:#d6e0ea}
.ca-foot ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.ca-foot a{color:var(--ca-muted);text-decoration:none}
.ca-foot a:hover{color:#fff}
.ca-foot-base{max-width:1320px;margin:40px auto 0;padding:22px 24px 0;border-top:1px solid var(--ca-line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:14px}
.ca-foot-base nav{display:flex;gap:20px}
@media (max-width:900px){.ca-foot-in{grid-template-columns:1fr 1fr}.ca-foot-in>div:first-child{grid-column:1/-1}}
@media (max-width:420px){.ca-foot-in{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){.ca-mega,.ca-links{transition:none}}