:root{
  --ui-focus:#2563eb;
  --ui-focus-ring:0 0 0 3px color-mix(in srgb,var(--ui-focus) 28%,transparent);
  --ui-success:#16844b;
  --ui-warning:#a96308;
  --ui-danger:#b42333;
  --ui-radius-sm:9px;
  --ui-radius-md:13px;
  --ui-control:42px;
  --ui-rail:232px;
  --ui-shell-max:1480px;
}

html{scroll-behavior:smooth;text-size-adjust:100%}
body{min-width:320px}
button,a,input,select,textarea,summary{touch-action:manipulation}
button,a,input,select,textarea,[tabindex]:not([tabindex="-1"]){outline:none}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,
summary:focus-visible,[tabindex]:not([tabindex="-1"]):focus-visible{
  outline:3px solid color-mix(in srgb,var(--ui-focus) 68%,transparent)!important;
  outline-offset:2px!important;
  box-shadow:var(--ui-focus-ring);
}
button:disabled,[aria-disabled="true"]{cursor:not-allowed!important}
.skip-link{position:fixed;left:12px;top:8px;z-index:100000;transform:translateY(-160%);padding:9px 13px;
  border-radius:9px;background:#111827;color:#fff;text-decoration:none;font-weight:750}
.skip-link:focus{transform:none}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;
  overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}

.product-nav{display:flex;align-items:center;gap:4px;padding:3px;border:1px solid var(--line);border-radius:11px;
  background:color-mix(in srgb,var(--panel) 76%,var(--soft, var(--bg)))}
.product-nav a{display:flex;align-items:center;min-height:36px;padding:7px 11px;border-radius:8px;color:var(--muted);
  font-size:12px;font-weight:720;text-decoration:none;white-space:nowrap}
.product-nav a:hover{color:var(--ink);background:var(--panel)}
.product-nav a[aria-current="page"]{background:var(--panel);color:var(--ink);box-shadow:0 2px 9px rgba(0,0,0,.08)}
.product-nav a.primary-link{background:var(--accent);color:#fff}

.ui-status{display:flex;align-items:center;gap:7px}
.ui-status-dot{width:8px;height:8px;border-radius:50%;background:#6b7280;flex:0 0 auto}
.ui-status-dot.good{background:var(--ui-success)}
.ui-status-dot.warn{background:var(--ui-warning)}
.ui-status-dot.bad{background:var(--ui-danger)}
.ui-inline-error{padding:12px 14px;border:1px solid color-mix(in srgb,var(--ui-danger) 36%,var(--line));
  border-radius:var(--ui-radius-md);background:color-mix(in srgb,var(--ui-danger) 7%,var(--panel));color:var(--ink)}
.ui-inline-error b{display:block;color:var(--ui-danger);margin-bottom:2px}
.ui-inline-error p{margin:0;color:var(--muted)}
.ui-skeleton{position:relative;overflow:hidden;background:var(--soft,var(--line));color:transparent!important}
.ui-skeleton:after{content:"";position:absolute;inset:0;transform:translateX(-100%);
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.46),transparent);animation:ui-shimmer 1.4s infinite}
@keyframes ui-shimmer{to{transform:translateX(100%)}}

@media(max-width:700px){
  .product-nav{gap:2px}.product-nav a{padding:7px 9px;font-size:11px}
}
@media(max-width:480px){
  .product-nav a{min-width:40px;justify-content:center;padding:7px 8px}
  .product-nav .nav-long{display:none}
}
@media(max-width:360px){.brand-link .brand{display:none}.product-nav a{min-width:0;padding-inline:7px}}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;scroll-behavior:auto!important}
}
@media(forced-colors:active){
  button,a,input,select,textarea,.product-nav,.panel,.card{border:1px solid CanvasText!important}
  [aria-current="page"],[aria-selected="true"],.selected{outline:2px solid Highlight!important}
}

/* Application shell -------------------------------------------------------
   The product follows the marketer's natural path: choose a creative, test it,
   then inspect evidence. This persistent shell replaces page-specific top bars
   on larger screens and becomes reachable bottom navigation on small screens. */
body.studio-shell{padding-left:var(--ui-rail);background-attachment:fixed}
body.studio-shell>header{
  position:fixed!important;inset:0 auto 0 0!important;width:var(--ui-rail)!important;height:100dvh!important;
  z-index:90!important;display:flex!important;flex-direction:column!important;align-items:stretch!important;gap:0!important;
  padding:22px 16px 18px!important;border:0!important;border-right:1px solid var(--line)!important;
  background:color-mix(in srgb,var(--panel) 94%,var(--bg))!important;backdrop-filter:blur(18px)!important;
}
body.studio-shell>header .brand-link{display:flex;align-items:center;gap:11px;min-height:46px;margin:0 3px 28px;color:var(--ink);text-decoration:none}
body.studio-shell>header .logo,body.studio-shell>header .mark{width:38px;height:38px;border-radius:12px;flex:0 0 auto}
body.studio-shell>header .brand{font-size:14px;line-height:1.15}
body.studio-shell>header .brand small{display:block;margin-top:3px;color:var(--muted);font-size:10px;font-weight:550;letter-spacing:.01em}
.rail-section-label{order:2;margin:0 10px 8px;color:var(--muted);font-size:10px;font-weight:750;letter-spacing:.09em;text-transform:uppercase}
body.studio-shell>header .product-nav{
  order:3;display:flex;flex-direction:column;align-items:stretch;gap:5px;padding:0;border:0;border-radius:0;background:transparent
}
body.studio-shell>header .product-nav a{
  display:grid;grid-template-columns:34px minmax(0,1fr);align-items:center;gap:10px;width:100%;min-height:52px;padding:8px 10px;
  border:1px solid transparent;border-radius:12px;color:var(--muted);font-size:12px;text-align:left;box-shadow:none
}
body.studio-shell>header .product-nav a:hover{border-color:var(--line);background:var(--panel);color:var(--ink)}
body.studio-shell>header .product-nav a[aria-current="page"]{
  border-color:color-mix(in srgb,var(--accent) 22%,var(--line));background:color-mix(in srgb,var(--accent) 9%,var(--panel));
  color:var(--ink);box-shadow:none
}
.nav-glyph{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--soft,var(--bg));font-size:15px;color:var(--muted)}
[aria-current="page"]>.nav-glyph{background:var(--accent);color:#fff}
.nav-copy{display:block;min-width:0}.nav-copy b{display:block;font-size:12px;line-height:1.2}.nav-copy small{display:block;margin-top:3px;color:var(--muted);font-size:9px;font-weight:520;line-height:1.2}
body.studio-shell>header .spacer{order:4;flex:1}
body.studio-shell>header .compute{order:5;position:static!important;justify-content:flex-start!important;margin:12px 5px 8px!important;padding:10px!important;
  border:1px solid var(--line)!important;border-radius:11px!important;background:var(--soft,var(--bg))!important;font-size:10px!important}
body.studio-shell>header #logout{order:6;width:100%;min-height:40px;background:transparent}
body.studio-shell>main{width:100%;max-width:var(--ui-shell-max);margin-inline:auto;padding-inline:clamp(20px,3vw,46px)}

/* Page-level hierarchy shared by all product workspaces. */
.page-kicker{margin-bottom:7px;color:var(--accent);font-size:10px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.page-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.workflow-steps{display:flex;align-items:center;gap:0;margin:0 0 14px;padding:0;list-style:none;color:var(--muted);font-size:10px;font-weight:700}
.workflow-steps li{display:flex;align-items:center;gap:6px}.workflow-steps li:not(:last-child):after{content:"";width:28px;height:1px;margin:0 8px;background:var(--line)}
.workflow-steps b{display:grid;place-items:center;width:21px;height:21px;border-radius:50%;background:var(--soft,var(--bg));border:1px solid var(--line);font-size:9px}
.workflow-steps .current{color:var(--ink)}.workflow-steps .current b{border-color:var(--accent);background:var(--accent);color:#fff}

/* In the creative workspace, collections are filters—not a second application
   navigation rail. Keep them in a compact, horizontally scrollable shelf. */
.page-creatives .workspace{display:block!important}
.page-creatives .sidebar{
  position:relative!important;top:auto!important;display:flex!important;flex-direction:row!important;align-items:center!important;gap:6px!important;
  width:100%!important;max-width:none!important;max-height:none!important;margin:0 0 16px;padding:8px!important;overflow-x:auto!important;overflow-y:hidden!important;
  border:1px solid var(--line);border-radius:13px;background:var(--panel);scrollbar-width:thin
}
.page-creatives .sidebar .side-h{display:none!important}
.page-creatives .sidebar .system-disclosure{display:none}
.page-creatives .sidebar .frow,.page-creatives .sidebar .newf{flex:0 0 auto;width:auto!important;min-height:38px;margin:0!important;padding:8px 10px!important;white-space:nowrap;border:1px solid var(--line)}
.page-creatives .sidebar .fbsec{display:none}
.page-creatives .sidebar .import-platforms small{margin-left:7px}
.page-creatives .sidebar .frow-acts{display:none}
.page-creatives .library-intro{align-items:center;margin-top:4px;margin-bottom:18px}
.page-creatives .library-intro h1{font-size:clamp(28px,3vw,38px)}
.page-creatives .library-intro p{max-width:620px;margin-top:6px;font-size:14px}
.page-creatives .library-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.page-simulate .layout{grid-template-columns:minmax(430px,520px) minmax(0,1fr)}
.page-simulate .launcher-column{top:24px}
.page-evidence .hero{align-items:center}.page-evidence .runpick{min-width:min(430px,100%)}

@media(max-width:1180px) and (min-width:841px){
  .page-simulate .layout{grid-template-columns:1fr}.page-simulate .launcher-column{position:static}
}

@media(max-width:840px){
  body.studio-shell{padding-left:0;padding-bottom:calc(72px + env(safe-area-inset-bottom))}
  body.studio-shell>header{
    position:sticky!important;inset:auto!important;top:0!important;width:100%!important;height:auto!important;min-height:58px!important;
    flex-direction:row!important;align-items:center!important;padding:9px 12px!important;border-right:0!important;border-bottom:1px solid var(--line)!important;
    backdrop-filter:none!important
  }
  body.studio-shell>header .brand-link{min-height:40px;margin:0}.rail-section-label{display:none}
  body.studio-shell>header .logo,body.studio-shell>header .mark{width:34px;height:34px;border-radius:10px}
  body.studio-shell>header .brand small{display:none}
  body.studio-shell>header .spacer{display:block;order:4}
  body.studio-shell>header .compute{display:none!important}
  body.studio-shell>header #logout{order:6;width:42px!important;height:42px!important;min-height:42px;padding:0!important;font-size:0!important}
  body.studio-shell>header #logout:before{content:"↪";font-size:17px}
  body.studio-shell>header .product-nav{
    position:fixed;inset:auto 0 0 0;z-index:95;display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:7px 10px calc(7px + env(safe-area-inset-bottom));
    border-top:1px solid var(--line);background:color-mix(in srgb,var(--panel) 96%,transparent);backdrop-filter:blur(16px)
  }
  body.studio-shell>header .product-nav a{display:flex;flex-direction:column;justify-content:center;gap:2px;min-height:50px;padding:4px 5px;border:0;text-align:center}
  body.studio-shell>header .product-nav a[aria-current="page"]{border:0;background:color-mix(in srgb,var(--accent) 10%,transparent)}
  .nav-glyph{width:25px;height:25px;background:transparent;font-size:14px}
  [aria-current="page"]>.nav-glyph{background:transparent;color:var(--accent)}
  .nav-copy b{font-size:10px}.nav-copy small{display:none}
  body.studio-shell>main{padding-inline:clamp(12px,4vw,24px)!important;padding-bottom:28px!important}
  .page-simulate .layout{grid-template-columns:minmax(0,1fr)}
  .page-simulate .launcher-column{min-width:0;width:100%}
  .page-creatives .sidebar{position:sticky!important;top:59px!important;z-index:18;margin-inline:0;padding:7px!important;border-radius:11px}
  .page-creatives .sidebar .system-disclosure{display:none}
  .page-creatives .library-actions .secondary-import{display:none}
  .workflow-steps li:not(:last-child):after{width:12px;margin-inline:5px}
  .page-copilot-launch{bottom:calc(76px + env(safe-area-inset-bottom))!important}
  .page-copilot{bottom:calc(130px + env(safe-area-inset-bottom))!important;height:calc(100dvh - 148px - env(safe-area-inset-bottom))!important}
}
@media(max-width:420px){
  body.studio-shell>header .brand{font-size:13px}.workflow-steps{font-size:9px}.workflow-steps b{width:19px;height:19px}
  .page-creatives .library-intro{align-items:flex-start}.page-creatives .library-intro h1{font-size:27px}
}