/*@3.SKIC.1*/

/*@3.SKIC.2*/


/*@3.SKIC.28*/
:root {
  --sa-t: env(safe-area-inset-top, 0px);
  --sa-r: env(safe-area-inset-right, 0px);
  --sa-b: env(safe-area-inset-bottom, 0px);
  --sa-l: env(safe-area-inset-left, 0px);
}

/*@3.SKIC.3*/

:root {
  --skin-dur-fast: 0.18s;   /*@3.SKIC.4*/
  --skin-dur-base: 0.28s;   /*@3.SKIC.5*/
  --skin-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --skin-ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --skin-lift: -2px;        /*@3.SKIC.6*/
}

/*@3.SKIC.7*/
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html { scroll-behavior: auto !important; }
  /*@3.SKIC.8*/
  .glass-card:hover,
  .level-card:hover,
  .module-card:hover,
  .toggle-btn:hover,
  .nav-btn:hover { transform: none !important; }
}


/*@3.SKIC.9*/

:focus-visible {
  outline: 2px solid var(--brand-500, #a78bfa);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/*@3.SKIC.10*/
:focus:not(:focus-visible) { outline: none; }

/*@3.SKIC.11*/
.btn-primary:focus-visible,
.hub-btn-primary:focus-visible {
  outline-color: var(--text-primary);
  outline-offset: 3px;
}


/*@3.SKIC.12*/

.site-header {
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  box-shadow: 0 1px 12px -6px var(--shadow-base);
}


/*@3.SKIC.13*/

.glass-card {
  box-shadow:
    0 1px 2px -1px var(--shadow-base),
    0 6px 16px -8px var(--shadow-base);
  transition:
    border-color var(--skin-dur-base) var(--skin-ease),
    box-shadow var(--skin-dur-base) var(--skin-ease),
    transform var(--skin-dur-base) var(--skin-ease-out);
}

.glass-card:hover {
  border-color: var(--border-hover);
  box-shadow:
    0 2px 4px -2px var(--shadow-base),
    0 12px 28px -10px var(--shadow-base);
}


/*@3.SKIC.14*/

.toggle-btn,
.nav-btn {
  transition:
    border-color var(--skin-dur-fast) var(--skin-ease),
    color var(--skin-dur-fast) var(--skin-ease),
    background var(--skin-dur-fast) var(--skin-ease),
    transform var(--skin-dur-fast) var(--skin-ease);
}

.toggle-btn:active,
.nav-btn:active,
.btn-primary:active,
.btn-secondary:active { transform: scale(0.96); }

@media (prefers-reduced-motion: reduce) {
  .toggle-btn:active,
  .nav-btn:active,
  .btn-primary:active,
  .btn-secondary:active { transform: none; }
}


/*@3.SKIC.15*/

input:not([type="checkbox"]):not([type="radio"]):focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--brand-500, #a78bfa);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-500, #a78bfa) 18%, transparent);
}


/*@3.SKIC.16*/

/*@3.SKIC.17*/

/*@3.SKIC.18*/
.quiz-options button,
.quiz-options label {
  transition:
    border-color var(--skin-dur-fast) var(--skin-ease),
    background var(--skin-dur-fast) var(--skin-ease),
    transform var(--skin-dur-fast) var(--skin-ease);
}

/*@3.SKIC.19*/
.depth-layer { transition: border-color var(--skin-dur-base) var(--skin-ease); }

/*@3.SKIC.20*/
.concept-card { scroll-margin-top: 88px; }
.concept-card:target {
  animation: skin-target-flash 1.6s var(--skin-ease-out) 1;
}
@keyframes skin-target-flash {
  0%   { box-shadow: 0 0 0 0 var(--brand-500, #a78bfa); }
  15%  { box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-500, #a78bfa) 55%, transparent); }
  100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--brand-500, #a78bfa) 0%, transparent); }
}


/*@3.SKIC.21*/

.hub-courses-grid > * {
  transition:
    border-color var(--skin-dur-base) var(--skin-ease),
    box-shadow var(--skin-dur-base) var(--skin-ease),
    transform var(--skin-dur-base) var(--skin-ease-out);
}


/*@3.SKIC.22*/

.level-card,
.collection-card {
  transition:
    border-color var(--skin-dur-base) var(--skin-ease),
    box-shadow var(--skin-dur-base) var(--skin-ease),
    transform var(--skin-dur-base) var(--skin-ease-out);
}


/*@3.SKIC.23*/

/*@3.SKIC.24*/
::selection {
  background: color-mix(in srgb, var(--brand-500, #a78bfa) 30%, transparent);
  color: var(--text-primary);
}

/*@3.SKIC.25*/
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

/*@3.SKIC.26*/
@media (max-width: 640px) and (pointer: coarse) {
  .toggle-btn,
  .nav-btn--icon {
    min-width: 44px;
    min-height: 44px;
  }
}


/*@3.SKIC.27*/
.gtl-toast {
  position: fixed; inset-inline: 0; margin-inline: auto;
  bottom: calc(1.5rem + var(--sa-b));
  width: max-content; max-width: min(92vw, 520px); z-index: 2100;
  display: flex; align-items: center; gap: .7rem;
  padding: .55rem .6rem .55rem 1rem;
  background: var(--bg-elevated); border: 1px solid var(--st-accent, #a78bfa);
  border-radius: var(--radius-pill); box-shadow: 0 10px 28px -8px rgba(0,0,0,.5);
  color: var(--text-primary); font-family: 'Cairo', sans-serif;
  font-size: .82rem; font-weight: 700;
  opacity: 0; transform: translateY(8px); transition: opacity .2s, transform .2s;
}
[dir="ltr"] .gtl-toast { font-family: 'Inter', 'Cairo', sans-serif; padding: .55rem 1rem .55rem .6rem; }
.gtl-toast.on { opacity: 1; transform: none; }
.gtl-toast > a {
  color: var(--st-accent, #a78bfa); text-decoration: none; white-space: nowrap;
  padding: .2rem .6rem; border-radius: var(--radius-pill);
  border: 1px solid color-mix(in srgb, var(--st-accent, #a78bfa) 45%, transparent);
  transition: background-color .18s;
}
.gtl-toast > a:hover { background: color-mix(in srgb, var(--st-accent, #a78bfa) 14%, transparent); }
.gtl-toast > button {
  width: 26px; height: 26px; flex-shrink: 0; display: grid; place-items: center;
  background: transparent; border: 0; color: var(--text-muted);
  font-size: 1.1rem; line-height: 1; cursor: pointer; border-radius: 50%;
}
.gtl-toast > button:hover { color: var(--text-primary); }
@media (max-width: 768px) { .gtl-toast { bottom: calc(56px + 1rem + var(--sa-b)); } }
@media (prefers-reduced-motion: reduce) { .gtl-toast { transition: none; } }

/*@3.SKIC.29*/
@supports (-webkit-touch-callout: none) {
  :root { --ios-field-fs: 16px; }
  html[data-font-size="xs"] :is(.main-content, .subject-hub, .dashboard) { --ios-field-fs: 19.6px; }
  html[data-font-size="sm"] :is(.main-content, .subject-hub, .dashboard) { --ios-field-fs: 17.6px; }
  input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="color"]):not([type="file"]):not([type="button"]):not([type="submit"]):not([type="reset"]):not([type="image"]):not([type="hidden"]):not(#na-doc-title),
  textarea:not(.pl-editor),
  select {
    font-size: var(--ios-field-fs) !important;
  }
}