:root {
  --psy-bg: #f8f7f4;
  --psy-text: #3f3f46;
  --psy-muted: #64748b;
  --psy-border: rgba(255,255,255,.82);
  --psy-glass: var(--site-glass, rgba(255,255,255,.68));
}
html { background: var(--psy-bg); }
body {
  background:
    radial-gradient(circle at 8% 8%, rgba(204,227,222,.78), transparent 34rem),
    radial-gradient(circle at 92% 82%, rgba(226,217,243,.72), transparent 38rem),
    linear-gradient(rgba(0,0,0,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.025) 1px, transparent 1px),
    var(--psy-bg) !important;
  background-size: auto, auto, 32px 32px, 32px 32px, auto !important;
  color: var(--psy-text) !important;
  padding-top: 76px !important;
}
.psyhub-course-shell {
  position: fixed;
  z-index: 5000;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1080px, calc(100% - 28px));
  min-height: 48px;
  padding: 8px 10px 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--psy-border);
  border-radius: 16px;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 12px 34px rgba(15,23,42,.08);
  font-family: Inter, "Noto Sans SC", system-ui, sans-serif;
}
.psyhub-course-brand {
  color: #18181b;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -.02em;
}
.psyhub-course-links { display: flex; gap: 6px; }
.psyhub-course-links a {
  color: #475569;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 11px;
  border-radius: 10px;
  transition: .2s ease;
}
.psyhub-course-links a:hover { color: #111827; background: rgba(255,255,255,.88); }
.back-home-btn, .home-fab { display: none !important; }
.glass-card, .card, .quiz-card, .stats, .toc-top, .modal-content {
  background: var(--psy-glass) !important;
  border-color: var(--psy-border) !important;
  box-shadow: var(--site-rim), var(--site-shadow) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}
.stats { color: var(--psy-text) !important; }
.stats > * { color: inherit; }
:is(a, button):focus-visible { outline: 2px solid #475569; outline-offset: 4px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0s !important; scroll-behavior: auto !important; }
}
.glass-button, .btn, button {
  border-radius: 16px !important;
}
.header, .header h1, header h1, .section-title {
  color: #27272a !important;
}
.container { position: relative; z-index: 1; }
a { text-underline-offset: 3px; }
@media (max-width: 640px) {
  body { padding-top: 86px !important; }
  .psyhub-course-shell { align-items: flex-start; }
  .psyhub-course-links a { padding: 7px 8px; font-size: 12px; }
}