/* Shared site chrome only: do not style lesson, quiz or fixed-slide content. */
body.skillr-shared-navigation { padding-top: 0; }
.skillr-site-header {
  --slate-950: #0f172a;
  --slate-700: #334155;
  --slate-200: #e2e8f0;
  --maths: #2563eb;
  --ux-ink: #0f172a;
  position: sticky;
  inset: 0 0 auto;
  z-index: 1000;
  width: 100%;
  height: auto;
  margin: 0;
  padding: 0;
  border: 0;
  border-bottom: 1px solid #d7e3f2;
  border-radius: 0;
  background: #fff;
  color: #334155;
  box-shadow: none;
  font: 700 16px/1.4 "Segoe UI", Arial, Helvetica, sans-serif;
}
.skillr-site-header *, .skillr-site-breadcrumb * { box-sizing: border-box; }
.skillr-site-header .site-header__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 10px;
  width: 100%;
  max-width: 1180px;
  min-height: 64px;
  height: auto;
  margin: 0 auto !important;
  padding: 8px 18px !important;
  border: 0;
  background: transparent;
}
.skillr-site-header .site-header__brand {
  display: flex;
  width: auto;
  align-items: center;
  flex: 0 0 auto;
  gap: 8px;
  padding: 5px 0 !important;
  color: #0f172a !important;
  font-size: 1.125rem;
  font-weight: 800;
  line-height: 1.25;
  white-space: nowrap;
  text-decoration: none !important;
}
.skillr-site-header .site-header__brand img { width: 38px; height: 38px; flex: 0 0 auto; }
.skillr-site-header .site-header__brand strong { color: #0f172a; font: inherit; }
.skillr-site-header .site-header__brand span { color: #2563eb; }
.skillr-site-header .site-header__links { display: flex; align-items: center; gap: 2px; min-width: 0; }
.skillr-site-header .site-header__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 7px 8px !important;
  border-radius: 6px;
  color: #334155;
  font-size: .92rem;
  font-weight: 700;
  line-height: 1.15;
  text-decoration: none;
}
.skillr-site-header .updates-link { gap: 6px; }
.skillr-site-header .updates-link__badge {
  padding: 3px 5px;
  border-radius: 3px;
  background: #c62828;
  color: #fff;
  font-size: .625rem;
  line-height: 1;
  text-transform: uppercase;
}
.skillr-site-header .site-header__menu { display: none; position: relative; margin: 0 0 0 auto; border: 0; padding: 0; }
.skillr-site-header .site-header__menu summary {
  display: block;
  min-height: 44px;
  padding: 12px;
  border: 1px solid #d7e3f2;
  border-radius: 6px;
  background: #fff;
  color: #334155;
  font: inherit;
  line-height: 1.15;
  list-style: none;
  cursor: pointer;
}
.skillr-site-header .site-header__menu summary::after { content: none; }
.skillr-site-header .site-header__menu summary::-webkit-details-marker { display: none; }
.skillr-site-header .site-header__menu-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  display: grid;
  width: min(280px, calc(100vw - 112px));
  max-height: calc(100dvh - 90px);
  overflow-y: auto;
  padding: 8px;
  border: 1px solid #d7e3f2;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(15,23,42,.16);
}
.skillr-site-header .site-header__menu-panel a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 6px;
  color: #334155;
  font-size: .9375rem;
  line-height: 1.3;
  text-decoration: none;
}
.skillr-site-header .site-header__links a:hover,
.skillr-site-header .site-header__menu-panel a:hover,
.skillr-site-header a[aria-current="page"] { background: #eef5ff; color: #2457d6; }
.skillr-site-header .skillr-header-tools { display: flex; flex: 0 0 auto; flex-wrap: nowrap; width: auto; align-items: center; gap: 2px; margin: 0; }
.skillr-site-header .skillr-utility-button {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  min-height: 44px;
  margin: 0;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: #4a607c;
  cursor: pointer;
}
.skillr-site-header .skillr-utility-button span {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}
.skillr-site-header .skillr-ui-icon { width: 19px; height: 19px; }
.skillr-site-header :is(a, button, summary):focus-visible { outline: 3px solid #2457d6; outline-offset: 2px; }
.skillr-site-breadcrumb {
  position: static;
  width: calc(100% - 36px);
  max-width: 1144px;
  margin: 12px auto;
  padding: 0;
  color: #53657d;
  font: 400 .875rem/1.5 "Segoe UI", Arial, Helvetica, sans-serif;
}
.skillr-site-breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.skillr-site-breadcrumb li { display: inline; overflow-wrap: anywhere; }
.skillr-site-breadcrumb li + li::before { content: "/"; margin-right: 6px; color: #53657d; }
.skillr-site-breadcrumb a { color: #2457d6; text-decoration: none; }
.skillr-site-breadcrumb a:hover { text-decoration: underline; }
@media (max-width: 1100px) {
  .skillr-site-header .site-header__links { display: none; }
  .skillr-site-header .site-header__menu { display: block; }
  .skillr-site-header .site-header__menu-panel { position: fixed; top: 64px; right: 16px; width: min(320px, calc(100vw - 32px)); }
}
@media (max-width: 420px) {
  .skillr-site-header .site-header__nav { padding: 8px 10px !important; gap: 4px; }
  .skillr-site-header .site-header__brand { gap: 4px; font-size: .875rem; }
  .skillr-site-header .site-header__brand img { width: 30px; height: 30px; }
  .skillr-site-header .site-header__menu summary { padding: 12px 8px; }
}
@media print {
  .skillr-site-header, .skillr-site-breadcrumb { display: none !important; }
}