/* =====================================================================
   Quilyn — theme.css  (Tier-1 design system)
   Design tokens + component styling layered over Bootstrap 5.
   Re-skin the whole LMS by editing the :root tokens below.
   ===================================================================== */

:root {
  --pa-badge-ink: #fff;
  --pa-hero-text-grad: linear-gradient(135deg, #fff 30%, #a5b4fc 100%);
  color-scheme: light dark;
  --pa-bg: #0a0d18;
  --pa-bg-2: #0e1222;
  --pa-surface-1: #12172a;
  --pa-surface-2: #171d34;
  --pa-surface-3: #1d2542;
  --pa-elev: #141a30;

  --pa-topbar-bg: rgba(18, 23, 42, 0.85);
  --pa-sidebar-bg: linear-gradient(180deg, rgba(18, 23, 42, .75), rgba(10, 13, 24, .75));


  --pa-ink: #eef1fb;
  --pa-ink-soft: #c8cee6;
  --pa-muted: #939bbd;
  --pa-faint: #6b7299;

  --pa-text-primary: var(--pa-ink);
  --pa-text-secondary: var(--pa-muted);

  --pa-line: rgba(255, 255, 255, .075);
  --pa-line-2: rgba(255, 255, 255, .12);
  --pa-border-inset: inset 0 0 0 1px var(--pa-line);
  --pa-border-inset-2: inset 0 0 0 1px var(--pa-line-2);

  --pa-brand: #6d8bff;
  --pa-brand-2: #9a6bff;
  --pa-brand-3: #57e0e0;
  --pa-grad: linear-gradient(135deg, var(--pa-brand) 0%, var(--pa-brand-2) 100%);
  --pa-grad-soft: linear-gradient(135deg, rgba(109, 139, 255, .16), rgba(154, 107, 255, .16));

  --pa-ok: #34d399;
  --pa-ok-bg: rgba(52, 211, 153, .12);
  --pa-ok-line: rgba(52, 211, 153, .40);
  --pa-bad: #fb7185;
  --pa-bad-bg: rgba(251, 113, 133, .12);
  --pa-bad-line: rgba(251, 113, 133, .40);
  --pa-warn: #fbbf24;
  --pa-warn-bg: rgba(251, 191, 36, .10);
  --pa-warn-line: rgba(251, 191, 36, .35);

  --pa-concept: hsl(190, 90%, 40%);
  --pa-concept-bg: hsla(190, 90%, 40%, 0.12);
  --pa-concept-line: hsla(190, 90%, 40%, 0.40);
  --pa-analogy: hsl(280, 80%, 65%);
  --pa-analogy-bg: hsla(280, 80%, 65%, 0.12);
  --pa-analogy-line: hsla(280, 80%, 65%, 0.40);

  /* Semantic UI Text Mappings */
  --pa-scenario-ink: #fff;
  --pa-recap-th-ink: #cdd6ff;
  --pa-tag-ink: var(--pa-concept);
  --pa-tag-bg: var(--pa-concept-bg);
  --pa-tag-line: var(--pa-concept-line);
  --pa-hint-ink: #ffe6ad;
  --pa-bp-ink: #aef0d3;
  --pa-bp-ink-b: #ddffe9;
  --pa-qtype-ink: #b9c2e6;
  --pa-opt-key-bg: rgba(0, 0, 0, .25);
  --pa-opt-key-ink: #c2caea;
  --pa-opt-sel-bg: rgba(109, 139, 255, .10);
  --pa-empty-code-bg: rgba(0, 0, 0, .35);
  --pa-empty-code-ink: #cdd6ff;
  --pa-active-mod-ink: #fff;

  --pa-r-xl: 20px;
  --pa-r-lg: 16px;
  --pa-r-md: 12px;
  --pa-r-sm: 9px;
  --pa-r-pill: 999px;

  /* Spatial Tokens (8pt system) */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-7: 32px;
  --sp-8: 48px;
  --sp-9: 64px;

  /* Tier-1 Elevation with Composited Inset Shadows */
  --pa-sh-sm: 0 1px 2px rgba(18, 22, 45, 0.04), 0 2px 4px rgba(18, 22, 45, 0.03), 0 4px 8px rgba(18, 22, 45, 0.02), var(--pa-border-inset);
  --pa-sh-md: 0 2px 4px rgba(18, 22, 45, 0.05), 0 8px 16px rgba(18, 22, 45, 0.04), 0 16px 32px rgba(18, 22, 45, 0.03), var(--pa-border-inset);
  --pa-sh-lg: 0 4px 8px rgba(18, 22, 45, 0.06), 0 16px 32px rgba(18, 22, 45, 0.05), 0 32px 64px rgba(18, 22, 45, 0.04), var(--pa-border-inset-2);

  --pa-ease: cubic-bezier(.4, 0, .2, 1);
  --pa-dur-xs: 100ms;
  --pa-dur-sm: 160ms;
  --pa-dur-md: 240ms;
  --pa-dur-lg: 360ms;

  --pa-font: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --pa-fs-xs: 11px;
  --pa-fs-sm: 12.5px;
  --pa-fs-base: 14.5px;
  --pa-fs-md: 15.5px;
  --pa-fs-lg: 17px;
  --pa-fs-xl: clamp(20px, 2vw, 24px);
  --pa-fs-2xl: clamp(24px, 3vw, 30px);
  --pa-fs-3xl: clamp(28px, 4vw, 36px);

  /* Bounded Fluid Grid Layout */
  --pa-sidebar-w: clamp(260px, 20vw, 312px);
  --pa-read: 1040px; 
}

/* ===================== Reset / base ===================== */
* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--pa-ink);
  font-family: var(--pa-font);
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: .1px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  background:
    radial-gradient(1100px 620px at 82% -8%, rgba(154, 107, 255, .18), transparent 60%),
    radial-gradient(900px 560px at 2% 4%, rgba(109, 139, 255, .16), transparent 55%),
    radial-gradient(800px 800px at 60% 120%, rgba(87, 224, 224, .07), transparent 60%),
    linear-gradient(180deg, var(--pa-bg-2), var(--pa-bg));
  background-attachment: fixed;
}

a {
  color: var(--pa-brand);
  text-decoration: none;
}

a:hover {
  color: #9fb2ff;
}

/* Scrollbars */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, .16) transparent;
}

* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, .14) transparent;
}

*::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, .14);
  border-radius: 4px;
}

*::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, .26);
}

/* ===================== SVG icon class ===================== */
/* Usage: <svg class="i"><use href="#i-name"/></svg> */
.i {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -.12em;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
  pointer-events: none;
}

.i-sm {
  width: .85em;
  height: .85em;
}

.i-lg {
  width: 1.2em;
  height: 1.2em;
}

/* ===================== Focus rings (a11y / tier-1 baseline) ===================== */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--pa-brand);
  outline-offset: 2px;
  box-shadow: none;
}

/* Tighter offset for inline/pill shapes */
.pa-tabs button:focus-visible,
.pa-btn:focus-visible,
.pa-track-switch select:focus-visible {
  outline: 2px solid var(--pa-brand);
  outline-offset: 2px;
  box-shadow: none;
}

.pa-card:focus-visible {
  outline: 2px solid var(--pa-brand);
  outline-offset: 2px;
  box-shadow: none;
}

/* ===================== Tabular numerals on all numeric UI ===================== */
.pa-progress-mini .lbl,
.pa-quizbar .stat,
.pa-result .big,
.pa-card .cmeta,
.pa-enh-band,
.pa-result .ring {
  font-variant-numeric: tabular-nums;
}

/* ===================== Card entrance animation ===================== */
@keyframes pa-card-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.pa-cards .pa-card {
  animation: pa-card-in var(--pa-dur-md) var(--pa-ease) both;
}

/* Stagger each card up to 9 visible above the fold */
.pa-cards .pa-card:nth-child(1) {
  animation-delay: 20ms;
}

.pa-cards .pa-card:nth-child(2) {
  animation-delay: 40ms;
}

.pa-cards .pa-card:nth-child(3) {
  animation-delay: 60ms;
}

.pa-cards .pa-card:nth-child(4) {
  animation-delay: 80ms;
}

.pa-cards .pa-card:nth-child(5) {
  animation-delay: 100ms;
}

.pa-cards .pa-card:nth-child(6) {
  animation-delay: 120ms;
}

.pa-cards .pa-card:nth-child(7) {
  animation-delay: 140ms;
}

.pa-cards .pa-card:nth-child(8) {
  animation-delay: 160ms;
}

.pa-cards .pa-card:nth-child(n+9) {
  animation-delay: 180ms;
}

@media (prefers-reduced-motion: reduce) {
  .pa-cards .pa-card {
    animation: none;
  }
}

.pa-app {
  display: grid;
  grid-template-columns: var(--pa-sidebar-w) 1fr;
  max-width: 1600px;
  margin: 0 auto;
  min-height: 100vh;
  box-shadow: 0 0 120px rgba(0, 0, 0, 0.5); /* Bounded App Edge Shadow */
  container-type: inline-size;
}

/* ===================== Sidebar ===================== */
.pa-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: var(--pa-sidebar-bg);
  border-right: 1px solid var(--pa-line);
  padding: var(--sp-5) var(--sp-4) var(--sp-7);
}

.pa-brandbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
  padding: 4px 6px;
}

.pa-logo {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--pa-grad);
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 20px;
  color: #fff;
  letter-spacing: -1px;
  box-shadow: 0 8px 24px rgba(109, 139, 255, .55), inset 0 1px 0 rgba(255,255,255,.30), inset 0 -1px 0 rgba(0,0,0,.15);
  flex-shrink: 0;
  user-select: none;
}

.pa-brandbar h1 {
  font-size: 17.5px;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.015em;
}

.pa-brandbar small {
  color: var(--pa-faint);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .3px;
}

.pa-track-switch {
  margin: 18px 6px 6px;
}

.pa-track-switch label {
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.1px;
  color: var(--pa-faint);
}

.pa-track-switch select {
  width: 100%;
  margin-top: 8px;
  color: var(--pa-ink);
  background:
    linear-gradient(var(--pa-surface-2), var(--pa-surface-2)) padding-box,
    var(--pa-grad) border-box;
  border: 1px solid transparent;
  border-radius: var(--pa-r-md);
  padding: 11px 36px 11px 13px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23939bbd' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>"),
    linear-gradient(var(--pa-surface-2), var(--pa-surface-2));
  background-repeat: no-repeat;
  background-position: right 12px center, 0 0;
  background-size: 14px, 100%;
  transition: box-shadow .2s var(--pa-ease);
}

.pa-track-switch select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(109, 139, 255, .30);
}

.pa-track-switch option {
  background: var(--pa-surface-1);
  color: var(--pa-ink);
}

.pa-progress-mini {
  margin: 16px 6px 16px;
}

.pa-progress-mini .bar {
  height: 8px;
  background: var(--pa-empty-code-bg);
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, .4);
}

.pa-progress-mini .bar>i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pa-brand), var(--pa-ok));
  transition: width .5s var(--pa-ease);
}

.pa-progress-mini .lbl {
  font-size: 11.5px;
  color: var(--pa-ink-soft);
  margin-top: 8px;
  font-weight: 600;
}

.pa-modlist {

  list-style: none;
  padding: 0;
  margin: 6px 0 0;
}

.pa-modlist li {
  margin: 3px 0;
}


.pa-modlist a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--pa-muted);
  font-size: 13.5px;
  font-weight: 500;
  border: 1px solid transparent;
  transform: translateZ(0);
  transition: transform 0.25s var(--pa-ease), color 0.25s var(--pa-ease);
  z-index: 1;
}

.pa-modlist a::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 12px;
  background: var(--pa-surface-1);
  opacity: 0;
  transition: opacity 0.25s var(--pa-ease);
  box-shadow: var(--pa-sh-sm);
  z-index: -1;
}

.pa-modlist a:hover {
  color: var(--pa-ink);
  text-decoration: none;
  transform: translateX(3px) scale(1.01);
}

.pa-modlist a:hover::before {
  opacity: 1;
}

.pa-modlist a.active {
  color: var(--pa-ink);
}

.pa-modlist a.active::before {
  opacity: 1;
  background: var(--pa-grad-soft);
  border: 1px solid var(--pa-line);
}

.pa-modlist a.active::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  border-radius: 0 3px 3px 0;
  background: var(--pa-grad);
  box-shadow: 0 0 8px var(--pa-brand);
}

.pa-modlist .mnum {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  background: var(--pa-surface-2);
  color: var(--pa-muted);
  border: 1px solid var(--pa-line);
  transition: all 0.25s var(--pa-ease);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.pa-modlist a:hover .mnum {
  color: var(--pa-ink);
  background: var(--pa-surface-1);
}

.pa-modlist a.active .mnum {
  background: var(--pa-grad);
  color: var(--pa-badge-ink);
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(109, 139, 255, 0.4), inset 0 1px 1px rgba(255,255,255,0.3);
}

.pa-modlist a.done .mnum {
  background: var(--pa-ok);
  color: #04231a;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(52, 211, 153, 0.3);
}
.pa-modlist .mtick {
  font-size: 12px;
  color: var(--pa-ok);
}

.pa-badge-soon {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--pa-warn);
  background: var(--pa-warn-bg);
  border: 1px solid var(--pa-warn-line);
  border-radius: 999px;
  padding: 2px 7px;
}

/* ===================== Main / topbar ===================== */
.pa-main {
  min-width: 0; /* Prevents flex/grid blowout */
}

.pa-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--pa-topbar-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--pa-line-2);
  box-shadow: var(--pa-sh-sm);
}

.pa-topbar-inner {
  display: grid;
  grid-template-columns: 1fr auto auto; /* left grows · nav · theme (both at far right) */
  align-items: center;
  gap: 10px;
  padding-block: 10px;
}

.pa-topbar-left {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  /* Removed justify-self: start; so it stretches and respects grid bounds */
  min-width: 0;
}

/* Theme toggle now lives at the far right, next to the main nav */
.pa-topbar-inner > .pa-theme-toggle {
  justify-self: end;
}

.pa-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--pa-surface-2);
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--pa-line);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

.pa-nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--pa-muted);
  text-decoration: none;
  transition: color 0.2s var(--pa-ease);
  z-index: 1;
}

.pa-nav-link::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--pa-surface-1);
  box-shadow: var(--pa-sh-sm);
  opacity: 0;
  transform: scale(0.95);
  transition: all 0.2s var(--pa-ease);
  z-index: -1;
}

.pa-nav-link:hover {
  color: var(--pa-ink);
  text-decoration: none;
}

.pa-nav-link.active {
  color: var(--pa-brand);
  font-weight: 700;
}

.pa-nav-link.active::before {
  opacity: 1;
  transform: scale(1);
}

.pa-nav-link .i {
  opacity: 0.7;
  transition: opacity 0.2s var(--pa-ease);
}

.pa-nav-link:hover .i,
.pa-nav-link.active .i {
  opacity: 1;
}

@media (max-width: 860px) {
  .pa-topbar-inner {
    grid-template-columns: 1fr auto;
    gap: 10px 16px;
  }
  .pa-topbar-left { grid-column: 1; grid-row: 1; }
  .pa-topbar-inner > .pa-theme-toggle { grid-column: 2; grid-row: 1; }
  /* Nav drops to a full-width second row so it never crowds the theme toggle */
  .pa-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    justify-content: center;
  }
  .pa-nav::-webkit-scrollbar { display: none; }
  .pa-nav-link { white-space: nowrap; }
}

/* Very narrow phones: collapse nav to icon-only to guarantee a fit */
@media (max-width: 460px) {
  .pa-nav-label { display: none; }
  .pa-nav-link { padding: 8px 12px; }
  .pa-nav-link .i { opacity: 1; }
}


.pa-topbar .crumbs {
  font-size: 13px;
  color: var(--pa-muted);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
  transition: color 0.2s var(--pa-ease);
}

.pa-topbar .crumbs b {
  color: var(--pa-ink);
  font-weight: 700;
}

.pa-topbar a.crumbs {
  padding: 7px 12px;
  border-radius: var(--pa-r-sm);
  border: 1px solid transparent;
  transition: .15s var(--pa-ease);
}

.pa-topbar a.crumbs:hover {
  background: var(--pa-surface-1);
  border-color: var(--pa-line);
  color: var(--pa-ink);
  text-decoration: none;
}



.pa-content {
  padding-block-start: 28px;
  padding-block-end: var(--sp-9);
}

/* Ensure sticky header doesn't cover headings when anchor-scrolling */
.pa-hero,
.pa-h2,
.pa-q {
  scroll-margin-top: 72px;
}
.pa-container {
  max-width: var(--pa-read);
  margin: 0 auto;
  padding-inline: clamp(16px, 4vw, 32px);
}


/* ===================== Section tabs (segmented) ===================== */
.pa-tabs {
  display: flex;
  gap: 4px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  scroll-snap-type: x mandatory;
  /* Stick just below the sticky header for easy in-page navigation while scrolling */
  position: sticky;
  top: calc(var(--pa-topbar-h, 64px) + 6px);
  z-index: 20;
  margin: 0 0 24px;
  padding: 5px;
  background: var(--pa-topbar-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--pa-line);
  border-radius: var(--pa-r-md);
  box-shadow: var(--pa-sh-md);
  max-width: 100%;
  will-change: transform;
  transform: translateZ(0);
}
.pa-tabs::-webkit-scrollbar { display: none; }

.pa-tabs button {
  background: transparent;
  color: var(--pa-muted);
  border: none;
  padding: 10px 18px;
  border-radius: var(--pa-r-sm);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  scroll-snap-align: start;
  transition: transform var(--pa-dur-sm) var(--pa-ease), background var(--pa-dur-sm) var(--pa-ease), color var(--pa-dur-sm) var(--pa-ease), box-shadow var(--pa-dur-sm) var(--pa-ease);
  white-space: nowrap;
}

.pa-tabs button:hover {
  color: var(--pa-ink);
  background: var(--pa-surface-2);
  transform: translateY(-1px);
}

.pa-tabs button:active {
  transform: scale(0.97);
}

.pa-tabs button.active {
  background: var(--pa-grad);
  color: var(--pa-scenario-ink);
  box-shadow: 0 6px 16px rgba(122, 92, 255, .40);
}

.pa-view {
  display: none;
  animation: pa-fade .32s var(--pa-ease);
}

.pa-view.active {
  display: block;
}

@keyframes pa-fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

/* Titles */
.pa-h2 {
  font-size: var(--pa-fs-2xl);
  font-weight: 800;
  letter-spacing: -.5px;
  margin: 4px 0 20px;
}

.pa-section {
  margin: 0 0 30px;
  max-width: var(--pa-read);
}

.pa-section>h3 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--pa-brand-3);
  margin: 26px 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pa-section>h3::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--pa-grad);
}

.pa-section p {
  color: var(--pa-ink-soft);
}

/* ===================== Core Concept card ===================== */
.pa-concept {
  position: relative;
  background: var(--pa-concept-bg);
  border: none;
  border-radius: var(--pa-r-lg);
  padding: 18px 20px 18px 22px;
  margin: 14px 0;
  box-shadow: var(--pa-sh-sm);
  transition: transform .18s var(--pa-ease), box-shadow .18s var(--pa-ease), border-color .18s var(--pa-ease);
}

.pa-concept::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 4px;
  border-radius: var(--pa-r-lg) 0 0 var(--pa-r-lg);
  background: var(--pa-concept);
}

.pa-concept:hover {
  transform: translateY(-2px);
  box-shadow: var(--pa-sh-md);
  border-color: var(--pa-concept-line);
}

.pa-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--pa-brand);
  background: rgba(109, 139, 255, .14);
  border: 1px solid rgba(109, 139, 255, .30);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 10px;
}

.pa-concept .pa-tag {
  color: var(--pa-concept);
  background: var(--pa-concept-bg);
  border-color: var(--pa-concept-line);
}

.pa-concept .term {
  display: block;
  font-weight: 700;
  font-size: 15.5px;
  color: var(--pa-text-primary);
  margin-bottom: 5px;
  letter-spacing: -.1px;
}

.pa-concept .desc {
  font-size: 14.5px;
  color: var(--pa-text-secondary);
}

/* ===================== Analogy ===================== */
.pa-analogy {
  position: relative;
  background: var(--pa-analogy-bg);
  border: none;
  border-radius: var(--pa-r-lg);
  padding: 16px 20px 16px 48px;
  margin: 14px 0;
  font-style: italic;
  color: var(--pa-text-primary);
  font-size: 14.5px;
  transition: transform .18s var(--pa-ease), box-shadow .18s var(--pa-ease), border-color .18s var(--pa-ease);
}

.pa-analogy::before {
  content: "\201C";
  position: absolute;
  left: 14px;
  top: 6px;
  font-size: 40px;
  line-height: 1;
  font-style: normal;
  font-family: Georgia, serif;
  color: var(--pa-analogy);
  opacity: 0.6;
}

.pa-analogy:hover {
  transform: translateY(-2px);
  box-shadow: var(--pa-sh-md);
  border-color: var(--pa-analogy-line);
}

.pa-analogy .pa-tag {
  font-style: normal;
  color: var(--pa-analogy);
  background: var(--pa-analogy-bg);
  border-color: var(--pa-analogy-line);
  display: inline-flex;
  margin-bottom: 8px;
}

/* ===================== Bullets ===================== */
.pa-bullets {
  padding-left: 4px;
  margin: 12px 0;
  list-style: none;
}

.pa-bullets li {
  position: relative;
  padding-left: 26px;
  margin: 9px 0;
  font-size: 14.5px;
  color: var(--pa-ink-soft);
}

.pa-bullets li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--pa-grad);
  transform: rotate(45deg);
}

/* ===================== Concept items list ===================== */
.pa-concept .desc {
  display: block;
}
.pa-concept-items {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}
.pa-concept-items li {
  position: relative;
  padding: 7px 0 7px 20px;
  font-size: 14px;
  color: var(--pa-ink-soft);
  border-top: 1px solid var(--pa-line);
  line-height: 1.5;
}
.pa-concept-items li:first-child { border-top: none; margin-top: 6px; }
.pa-concept-items li::before {
  content: "›";
  position: absolute;
  left: 4px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--pa-concept);
  font-weight: 700;
}

/* ===================== Steps (ordered process) ===================== */
.pa-steps {
  background: var(--pa-surface-1);
  border: 1px solid var(--pa-line-2);
  border-radius: var(--pa-r-lg);
  padding: 16px 20px 16px 16px;
  margin: 14px 0;
  box-shadow: var(--pa-sh-sm);
}
.pa-steps-title {
  font-weight: 700;
  font-size: 13.5px;
  color: var(--pa-ink);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--pa-brand-3);
}
.pa-steps-list {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 10px;
}
.pa-steps-list li {
  font-size: 14.5px;
  color: var(--pa-ink-soft);
  padding-left: 4px;
  line-height: 1.55;
}
.pa-steps-list li::marker {
  color: var(--pa-brand);
  font-weight: 800;
  font-size: 13px;
}

/* ===================== List (unordered with title) ===================== */
.pa-list {
  background: var(--pa-surface-1);
  border: 1px solid var(--pa-line-2);
  border-radius: var(--pa-r-lg);
  padding: 14px 18px;
  margin: 14px 0;
  box-shadow: var(--pa-sh-sm);
}
.pa-list-title {
  font-weight: 700;
  font-size: 13.5px;
  color: var(--pa-ink);
  margin-bottom: 10px;
}
.pa-list-items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.pa-list-items li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  color: var(--pa-ink-soft);
  line-height: 1.5;
}
.pa-list-items li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--pa-grad);
  transform: rotate(45deg);
}

/* ===================== Comparison / data table ===================== */
.pa-table-wrap {
  max-width: var(--pa-read);
  margin: 16px 0;
  overflow-x: auto;
  border-radius: var(--pa-r-lg);
  box-shadow: var(--pa-sh-sm);
}
.pa-inline-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.pa-inline-table th {
  background: var(--pa-surface-2);
  color: var(--pa-ink);
  font-weight: 700;
  padding: 11px 14px;
  text-align: left;
  border-bottom: 2px solid var(--pa-line-2);
  white-space: nowrap;
}
.pa-inline-table td {
  background: var(--pa-surface-1);
  color: var(--pa-ink-soft);
  padding: 10px 14px;
  border-bottom: 1px solid var(--pa-line);
  vertical-align: top;
  line-height: 1.5;
}
.pa-inline-table tr:last-child td { border-bottom: none; }
.pa-inline-table tr:hover td { background: var(--pa-elev); }

/* ===================== Note / Warning callout boxes ===================== */
.pa-note {
  background: rgba(109, 139, 255, .08);
  border: 1px solid rgba(109, 139, 255, .28);
  border-left: 4px solid var(--pa-brand);
  border-radius: var(--pa-r-md);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 14px;
  color: var(--pa-ink-soft);
  line-height: 1.55;
}
.pa-warning {
  background: var(--pa-warn-bg);
  border: 1px solid var(--pa-warn-line);
  border-left: 4px solid var(--pa-warn);
  border-radius: var(--pa-r-md);
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 14px;
  color: var(--pa-ink-soft);
  line-height: 1.55;
}

/* ===================== Links list ===================== */
.pa-links {
  margin: 12px 0;
}
.pa-links-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--pa-ink-soft);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 8px;
}
.pa-links-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pa-links-list li {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 14px;
  line-height: 1.5;
}
.pa-links-list li::before {
  content: "↗";
  font-size: 12px;
  color: var(--pa-brand);
  flex-shrink: 0;
}
.pa-links-list a {
  color: var(--pa-brand);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}
.pa-links-list a:hover {
  border-bottom-color: var(--pa-brand);
}
.pa-links-note {
  color: var(--pa-ink-soft);
  font-size: 13px;
}

/* ===================== Exam pitfalls ===================== */
.pa-pitfalls-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: var(--pa-read);
}

.pa-pitfall {
  border-radius: var(--pa-r-lg);
  background: var(--pa-surface-1);
  box-shadow: var(--pa-sh-sm);
  overflow: hidden;
  border: 1px solid var(--pa-line);
  transition: box-shadow .2s var(--pa-ease), transform .2s var(--pa-ease);
}

.pa-pitfall:hover {
  box-shadow: var(--pa-sh-md);
  transform: translateY(-1px);
}

.pa-pf-hd {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 18px;
  background: var(--pa-surface-2);
  border-bottom: 1px solid var(--pa-line);
}

.pa-pf-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 22px;
  padding: 0 6px;
  border-radius: 5px;
  background: var(--pa-warn-bg);
  border: 1px solid var(--pa-warn-line);
  color: var(--pa-warn);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.pa-pf-title-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--pa-ink);
  line-height: 1.35;
}

.pa-pf-trap {
  padding: 13px 18px;
  background: var(--pa-bad-bg);
  border-left: 3px solid var(--pa-bad);
  border-bottom: 1px solid var(--pa-line);
}

.pa-pf-fix {
  padding: 13px 18px;
  background: var(--pa-ok-bg);
  border-left: 3px solid var(--pa-ok);
}

.pa-pf-lbl {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.pa-pf-trap .pa-pf-lbl { color: var(--pa-bad); }
.pa-pf-fix  .pa-pf-lbl { color: var(--pa-ok); }

.pa-pf-icon {
  font-style: normal;
  font-size: 12px;
}

.pa-pf-trap p,
.pa-pf-fix p {
  font-size: 13.5px;
  line-height: 1.55;
  margin: 0;
  color: var(--pa-ink);
}

/* ===================== Quick recap table ===================== */
.pa-recap {
  width: 100%;
  max-width: var(--pa-read);
  border-collapse: separate;
  border-spacing: 0;
  margin: 12px 0;
  font-size: 14px;
  border: none;
  border-radius: var(--pa-r-lg);
  overflow: hidden;
  box-shadow: var(--pa-sh-sm);
}

.pa-recap th,
.pa-recap td {
  padding: 13px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--pa-line);
}

.pa-recap tr:last-child th,
.pa-recap tr:last-child td {
  border-bottom: none;
}

.pa-recap th {
  background: var(--pa-surface-2);
  color: var(--pa-recap-th-ink);
  font-weight: 700;
  width: 34%;
}

.pa-recap td {
  color: var(--pa-ink-soft);
  background: var(--pa-surface-1);
}

/* ===================== Quiz ===================== */

/* --- Quiz progress pill (lives inside .pa-tabs after Quick Recap) --- */
.pa-quiz-pill {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 6px 0 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--pa-ink);
  white-space: nowrap;
  flex-shrink: 0;
  border-left: 1px solid var(--pa-line);
}

.pqp-track {
  width: 208px;
  height: 5px;
  background: var(--pa-surface-2);
  border-radius: 999px;
  overflow: hidden;
  flex-shrink: 0;
}

.pqp-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--pa-brand), var(--pa-ok));
  transition: width .35s var(--pa-ease);
}

.pqp-g, .pqp-s { color: var(--pa-brand); }
.pqp-t { color: var(--pa-muted); font-weight: 500; }

/* --- Inline reset button above question list --- */
.pa-quiz-reset {
  display: block;
  margin: 8px 0 16px;
  font-size: 12px;
  padding: 5px 12px;
}

.pa-q {
  border: none;
  border-left: 3px solid var(--pa-brand);
  border-radius: var(--pa-r-lg);
  padding: 24px 28px;
  margin: 16px 0;
  background: linear-gradient(180deg, var(--pa-surface-1), var(--pa-elev));
  box-shadow: var(--pa-sh-sm);
  max-width: var(--pa-read);
}

.pa-q .qhead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.pa-q .qtype {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .7px;
  text-transform: uppercase;
  color: var(--pa-qtype-ink);
  background: var(--pa-surface-3);
  border: 1px solid var(--pa-line-2);
  border-radius: 999px;
  padding: 4px 10px;
}

.pa-q .qtype.multi {
  color: #ffd9a8;
  background: rgba(251, 191, 36, .12);
  border-color: var(--pa-warn-line);
}

.pa-q .qno {
  font-size: 12px;
  color: var(--pa-faint);
  font-weight: 500;
}

.pa-q .scenario {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  margin: 4px 0 14px;
  color: var(--pa-scenario-ink);
}

.pa-opt {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid transparent;
  border-radius: var(--pa-r-md);
  padding: 14px 16px;
  margin: 10px 0;
  cursor: pointer;
  background: var(--pa-surface-2);
  transition: transform var(--pa-dur-sm) var(--pa-ease), background var(--pa-dur-sm) var(--pa-ease), border-color var(--pa-dur-sm) var(--pa-ease);
}

.pa-opt:hover {
  border-color: var(--pa-line-2);
  background: var(--pa-surface-3);
  transform: translateY(-1px);
}

.pa-opt:active {
  transform: scale(0.99);
}

.pa-opt .key {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  border: 1px solid var(--pa-line-2);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 13px;
  color: var(--pa-opt-key-ink);
  background: var(--pa-opt-key-bg);
  transition: .15s var(--pa-ease);
}

.pa-opt .txt {
  font-size: 14.5px;
  padding-top: 1px;
}

.pa-opt .rat {
  display: none;
  width: 100%;
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--pa-muted);
  border-top: 1px dashed var(--pa-line-2);
  padding-top: 8px;
}

.pa-q.answered .opt,
.pa-q.answered .pa-opt {
  cursor: default;
}

.pa-q.answered .pa-opt .rat {
  display: block;
}

.pa-opt.selected {
  background: var(--pa-opt-sel-bg);
  border-color: var(--pa-brand);
}

.pa-opt.selected .key {
  background: var(--pa-brand);
  border-color: var(--pa-brand);
  color: var(--pa-scenario-ink);
}

.pa-opt.correct {
  background: rgba(52, 211, 153, .18);
  border-color: #34d399;
  border-width: 2px;
}

.pa-opt.correct .key {
  background: #34d399;
  border-color: #34d399;
  color: #04231a;
  font-size: 14px;
}

.pa-opt.wrong {
  background: rgba(251, 113, 133, .18);
  border-color: #fb7185;
  border-width: 2px;
}

.pa-opt.wrong .key {
  background: #fb7185;
  border-color: #fb7185;
  color: #2a0710;
  font-size: 14px;
}

.pa-opt.correct .rat {
  color: #bff0d6;
}

.pa-opt.wrong .rat {
  color: #ffc9cf;
}

.pa-q .hint-wrap {
  margin-top: 10px;
}

.pa-q .pa-hint-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: transparent;
  border: none;
  outline: none;
  padding: 4px 2px;
  font-size: 13px;
  font-weight: 500;
  color: var(--pa-ink-2);
  cursor: pointer;
  border-radius: var(--pa-r-sm);
  transition: color .15s var(--pa-ease);
}

.pa-q .pa-hint-btn:focus {
  outline: none;
}

.pa-q .pa-hint-btn:hover {
  color: var(--pa-ink);
}

.pa-q .pa-hint-btn .hint-caret {
  font-size: 11px;
  transition: transform .2s var(--pa-ease);
}

.pa-q .pa-hint-btn.open .hint-caret {
  transform: rotate(180deg);
}

.pa-q .hintbox {
  display: none;
  margin-top: 6px;
  font-size: 13px;
  background: var(--pa-warn-bg);
  border: 1px solid var(--pa-warn-line);
  color: var(--pa-ink);
  padding: 10px 13px;
  border-radius: var(--pa-r-md);
  line-height: 1.5;
}

.pa-q .hintbox.show {
  display: block;
}

.pa-q .verdict {
  display: none;
  margin-top: 12px;
  font-size: 13px;
  font-weight: 700;
}

.pa-q.answered .verdict {
  display: block;
}

.pa-q.ok .verdict {
  color: var(--pa-ok);
}

.pa-q.no .verdict {
  color: var(--pa-bad);
}

.pa-q .rationale {
  display: none;
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--pa-ink-soft);
  border-top: 1px dashed var(--pa-line-2);
  padding-top: 11px;
}

.pa-q.answered .rationale {
  display: block;
}

.pa-q .rationale b {
  color: var(--pa-scenario-ink);
}

/* Buttons */
.pa-btn {
  background: var(--pa-surface-2);
  color: var(--pa-ink);
  border: 1px solid var(--pa-line-2);
  padding: 10px 20px;
  border-radius: var(--pa-r-md);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--pa-dur-sm) var(--pa-ease), box-shadow var(--pa-dur-sm) var(--pa-ease), border-color var(--pa-dur-sm) var(--pa-ease), background var(--pa-dur-sm) var(--pa-ease);
}

.pa-btn:hover {
  border-color: var(--pa-brand);
  background: var(--pa-surface-3);
  transform: translateY(-1px);
  box-shadow: var(--pa-sh-sm);
}

.pa-btn:active {
  transform: scale(0.96);
  box-shadow: none;
}

.pa-btn.primary {
  background: var(--pa-grad);
  border: none;
  color: var(--pa-scenario-ink);
  box-shadow: 0 6px 16px rgba(122, 92, 255, .4);
}

.pa-btn.primary:hover {
  filter: brightness(1.07);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(122, 92, 255, .5);
}

.pa-btn.primary:active {
  transform: scale(0.96);
  box-shadow: 0 4px 10px rgba(122, 92, 255, .3);
}

.pa-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

/* Quiz result */
.pa-result {
  display: none;
  text-align: center;
  padding: 30px;
  border: none;
  border-radius: var(--pa-r-xl);
  background: linear-gradient(180deg, var(--pa-surface-1), var(--pa-elev));
  margin: 20px 0;
  max-width: var(--pa-read);
  box-shadow: var(--pa-sh-md);
}

.pa-result.show {
  display: block;
}

.pa-result .big {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -1px;
  margin: 6px 0;
}

.pa-result .ring {
  font-size: 13px;
  color: var(--pa-muted);
}

/* ===================== Dashboard (home) ===================== */
.pa-hero {
  position: relative;
  overflow: hidden;
  padding: 48px 40px;
  border: 1px solid var(--pa-line-2);
  border-radius: var(--pa-r-xl);
  margin-bottom: 26px;
  box-shadow: var(--pa-sh-md);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 180px;
  background: var(--pa-hero-bg,
    radial-gradient(700px 240px at 12% -40%, rgba(109, 139, 255, .30), transparent 70%),
    radial-gradient(600px 240px at 95% 140%, rgba(154, 107, 255, .22), transparent 70%),
    linear-gradient(180deg, var(--pa-surface-1), var(--pa-elev)));
}

.pa-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 60%, rgba(87, 224, 224, .06));
  pointer-events: none;
}

.pa-hero h2 {
  margin: 0 0 12px;
  font-size: var(--pa-fs-3xl);
  font-weight: 800;
  letter-spacing: -.6px;
  background: var(--pa-hero-text-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pa-hero p {
  color: var(--pa-muted);
  margin: 0;
  font-size: var(--pa-fs-base);
  max-width: 70ch;
}

.pa-cards {

  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(264px, 1fr));
  gap: 16px;
}

.pa-card {
  background: var(--pa-surface-1);
  border: none;
  border-radius: var(--pa-r-md);
  box-shadow: var(--pa-sh-sm);
  position: relative;
  overflow: hidden;
  padding: 22px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: transform var(--pa-dur-md) var(--pa-ease), box-shadow var(--pa-dur-md) var(--pa-ease), border-color var(--pa-dur-md) var(--pa-ease);
}

.pa-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--pa-grad);
  opacity: 0.45;
  transition: opacity .18s var(--pa-ease);
}

.pa-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--pa-sh-lg);
  border-color: var(--pa-line-2);
}

.pa-card:active {
  transform: scale(0.98);
}

.pa-card:hover::before {
  opacity: 1;
}

.pa-card .cnum {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 10px;
  background: rgba(109, 139, 255, 0.1);
  border: 1px solid rgba(109, 139, 255, 0.25);
  border-radius: 999px;
  color: var(--pa-brand);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .6px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.pa-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 12px;
  line-height: 1.35;
  letter-spacing: -.2px;
}

.pa-card .cmeta {
  font-size: 12px;
  color: var(--pa-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.pa-card .cdone {
  color: var(--pa-ok);
  font-weight: 700;
  background: var(--pa-ok-bg);
  border: 1px solid var(--pa-ok-line);
  border-radius: 999px;
  padding: 2px 9px;
}

.pa-empty {
  color: var(--pa-muted);
  font-size: 14px;
  padding: 40px 30px;
  text-align: center;
  border: 1px dashed var(--pa-line-2);
  border-radius: var(--pa-r-lg);
  background: var(--pa-surface-1);
  max-width: var(--pa-read);
}

.pa-empty code {
  background: var(--pa-empty-code-bg);
  border: none;
  border-radius: 6px;
  padding: 1px 6px;
  color: var(--pa-recap-th-ink);
}

.pa-footer {
  text-align: center;
  color: var(--pa-faint);
  font-size: 12px;
  padding: 26px;
}

/* ===================== Score trend sparkline ===================== */
.pa-card .cspark {
  font-size: 11px;
  color: var(--pa-brand);
  opacity: .85;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

/* ===================== Weak-area focus panel ===================== */
.pa-weak-panel {
  background: var(--pa-surface-1);
  border: 1px solid var(--pa-line-2);
  border-radius: var(--pa-r-lg);
  padding: 16px 20px;
  margin-bottom: 28px;
  max-width: var(--pa-read);
}
.pa-weak-head {
  font-size: 13px;
  font-weight: 700;
  color: var(--pa-ink);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.pa-weak-sub {
  font-weight: 400;
  font-size: 11px;
  color: var(--pa-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.pa-weak-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 8px;
  border-radius: var(--pa-r-sm);
  cursor: pointer;
  transition: background .12s var(--pa-ease);
  margin-bottom: 3px;
}
.pa-weak-row:hover {
  background: var(--pa-elev);
}
.pa-weak-row:last-child { margin-bottom: 0; }
.pa-weak-info {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 1;
  min-width: 0;
}
.pa-weak-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--pa-muted);
  min-width: 26px;
  flex-shrink: 0;
}
.pa-weak-name {
  font-size: 12px;
  color: var(--pa-ink-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pa-weak-bar-wrap {
  width: 90px;
  height: 5px;
  background: var(--pa-line-2);
  border-radius: 99px;
  flex-shrink: 0;
  overflow: hidden;
}
.pa-weak-bar {
  height: 100%;
  border-radius: 99px;
  transition: width .3s var(--pa-ease);
}
.pa-weak-pct {
  font-size: 12px;
  font-weight: 700;
  color: var(--pa-ink);
  min-width: 34px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ===================== Retry wrong answers button ===================== */
.pa-retry-wrong {
  display: inline-block;
  margin-top: 14px;
  background: var(--pa-surface-2);
  color: var(--pa-ink);
  border: 1px solid var(--pa-line-2);
  border-radius: var(--pa-r-sm);
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background .14s var(--pa-ease), border-color .14s var(--pa-ease);
}
.pa-retry-wrong:hover {
  background: var(--pa-elev);
  border-color: var(--pa-brand);
  color: var(--pa-brand);
}

/* ===================== Theme toggle button ===================== */
.pa-theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: var(--pa-r-sm);
  background: var(--pa-surface-1);
  border: none;
  color: var(--pa-ink);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  transition: .15s var(--pa-ease);
  margin-right: 6px;
}

.pa-theme-toggle:hover {
  background: var(--pa-surface-2);
  border-color: var(--pa-line-2);
  transform: translateY(-1px);
}

.pa-theme-toggle:active {
  transform: translateY(0);
}

/* ===================== LIGHT THEME ===================== */



















/* Text colors that were hardcoded for the dark theme */









/* Hardcoded dark-only text colours that need light-mode overrides */




/* ===================== Mobile ===================== */
.pa-menu-toggle {
  display: none;
  background: var(--pa-surface-2);
  border: 1px solid var(--pa-line-2);
  color: var(--pa-ink);
  border-radius: var(--pa-r-sm);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 18px;
}

@media (max-width: 860px) {
  /* Collapse the two-column app grid to a single full-width column.
     The sidebar becomes an off-canvas overlay (below), so without this the
     empty sidebar track would still squeeze the content into a narrow column. */
  .pa-app {
    grid-template-columns: 1fr;
  }

  .pa-sidebar {
    position: fixed;
    left: -100%;
    top: 0;
    width: min(312px, 86vw);
    z-index: 40;
    height: 100vh;
    height: 100dvh;
    overflow-y: auto;
    background: var(--pa-sidebar-bg, var(--pa-surface-1));
    border-right: 1px solid var(--pa-line);
    padding: var(--sp-5) var(--sp-4) var(--sp-7);
    transition: left var(--pa-dur-md) var(--pa-ease);
    box-shadow: 4px 0 32px rgba(0,0,0,.35);
  }

  .pa-sidebar.open {
    left: 0;
  }

  /* Dim/scrim backdrop when the sidebar is open */
  .pa-sidebar.open::after {
    content: "";
    position: fixed;
    inset: 0;
    left: min(312px, 86vw);
    background: rgba(0, 0, 0, .45);
    z-index: -1;
  }

  .pa-menu-toggle {
    display: inline-flex !important;
  }

  .pa-h2 {
    font-size: 22px;
  }

  .pa-content {
    padding-block-start: 20px;
  }
}

/* ===================== Learning objectives header ===================== */
.pa-objectives {
  max-width: var(--pa-read);
  margin: 0 0 26px;
  padding: 18px 22px;
  background: var(--pa-grad-soft);
  border: 1px solid var(--pa-line-2);
  border-left: 4px solid var(--pa-brand);
  border-radius: var(--pa-r-lg);
  box-shadow: var(--pa-sh-sm);
}

.pa-obj-head {
  font-weight: 700;
  font-size: 15px;
  color: var(--pa-ink);
  margin-bottom: 10px;
  letter-spacing: .2px;
}

.pa-objectives ul {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 7px;
}

.pa-objectives li {
  color: var(--pa-ink-soft);
  font-size: 14.5px;
  line-height: 1.5;
}

.pa-obj-meta {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--pa-muted);
  font-weight: 600;
}

.pa-topics {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--pa-line-2);
}
.pa-topics-head {
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--pa-muted);
  margin-bottom: 8px;
}
.pa-topics-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.pa-topic-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12.5px;
  color: var(--pa-brand);
  text-decoration: none;
  background: var(--pa-surface-1);
  border: 1px solid var(--pa-line-2);
  border-radius: 20px;
  padding: 4px 11px;
  transition: background .15s, border-color .15s;
  white-space: nowrap;
}
.pa-topic-link:hover {
  background: var(--pa-elev);
  border-color: var(--pa-brand);
}
.pa-topic-dur {
  font-size: 11px;
  color: var(--pa-muted);
}
.pa-quiz-ext {
  color: var(--pa-ok);
  border-color: var(--pa-ok-line);
  background: var(--pa-ok-bg);
}
.pa-quiz-ext:hover {
  border-color: var(--pa-ok);
  background: rgba(52, 211, 153, .18);
}
.pa-module-ext {
  display: inline-flex !important;
  align-items: center;
  gap: 4px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--pa-brand) !important;
  text-decoration: none !important;
  background: rgba(109,139,255,.15) !important;
  border: 1px solid rgba(109,139,255,.35) !important;
  border-radius: 6px;
  padding: 3px 8px;
  margin-left: 10px;
  vertical-align: middle;
  letter-spacing: .2px;
  transition: background .15s, border-color .15s;
  white-space: nowrap;
}
.pa-module-ext::before {
  content: '' !important;
}
.pa-module-ext:hover {
  background: rgba(109,139,255,.28) !important;
  border-color: var(--pa-brand) !important;
}

/* ===================== Enhancement Band (Progress Resume Strip) ===================== */
/* SEV-2B: All styles extracted from enhancement.js inline style.cssText strings. */

.pa-enh-band {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  background: linear-gradient(135deg, var(--pa-surface-1), var(--pa-elev));
  border: 1px solid var(--pa-line-2);
  border-radius: var(--pa-r-xl);
  padding: 18px 24px;
  margin-bottom: 20px;
  box-shadow: var(--pa-sh-sm);
  position: relative;
  overflow: hidden;
}

.pa-enh-band__glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 180px at 90% 50%, rgba(154, 107, 255, .12), transparent 65%);
  pointer-events: none;
}

/* Progress ring */
.pa-enh-ring {
  position: relative;
  width: 56px;
  height: 56px;
  flex: 0 0 auto;
  color: var(--pa-brand); /* SVG circles use currentColor */
}

.pa-enh-ring__label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--pa-ink);
}

/* Center column */
.pa-enh-centre {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

/* Resume CTA button */
.pa-enh-resume {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--pa-grad);
  color: #fff;
  border: none;
  border-radius: var(--pa-r-md);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(122, 92, 255, .35);
  transition: opacity var(--pa-dur-sm) var(--pa-ease), transform var(--pa-dur-sm) var(--pa-ease);
  white-space: nowrap;
  align-self: flex-start;
}

.pa-enh-resume:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  text-decoration: none;
  color: #fff;
}

.pa-enh-resume__label {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* "All complete" badge */
.pa-enh-complete {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--pa-ok-bg);
  color: var(--pa-ok);
  border: 1px solid var(--pa-ok-line);
  border-radius: var(--pa-r-md);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 700;
  align-self: flex-start;
}

/* Stats row */
.pa-enh-stats {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.pa-enh-stat {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--pa-muted);
  font-variant-numeric: tabular-nums;
}

.pa-enh-stat b {
  color: var(--pa-ink);
  font-weight: 700;
}

.pa-enh-stat--streak b {
  color: var(--pa-warn);
}

/* Domain bars (right column, PSA only) */
.pa-enh-domains {
  display: grid;
  gap: 7px;
  min-width: 200px;
  max-width: 240px;
}

.pa-enh-domain {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.pa-enh-domain__meta {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
}

.pa-enh-domain__name {
  color: var(--pa-ink-soft);
  font-weight: 500;
}

.pa-enh-domain__count {
  color: var(--pa-muted);
  font-variant-numeric: tabular-nums;
}

.pa-enh-domain__track {
  height: 4px;
  background: var(--pa-line);
  border-radius: 99px;
  overflow: hidden;
}

.pa-enh-domain__fill {
  height: 100%;
  border-radius: 99px;
  background: var(--domain-color, var(--pa-brand));
  transition: width 0.4s var(--pa-ease);
}

/* Responsive: hide domain bars on narrow viewports */
@media (max-width: 820px) {
  .pa-enh-domains { display: none; }
  .pa-enh-band { grid-template-columns: auto 1fr; }
}

/* Light theme: glow overlay adjusts for white background */
:root[data-theme="light"] .pa-enh-band__glow {
  background: radial-gradient(600px 180px at 90% 50%, rgba(138, 79, 230, .08), transparent 65%);
}

/* ===================== Diagrams (inline SVG figures) ===================== */
.pa-figure {
  max-width: var(--pa-read);
  margin: 22px 0;
  padding: 20px;
  background: var(--pa-surface-1);
  border: none;
  border-radius: var(--pa-r-lg);
  box-shadow: var(--pa-sh-sm);
  text-align: center;
}

.pa-figure svg {
  width: 100%;
  height: auto;
  max-width: 760px;
}

/* Diagram SVGs reference var(--t) for theme-adaptive text/strokes. */
.pa-figure {
  --t: var(--pa-ink);
  --bg2: var(--pa-surface-2);
  --b: var(--pa-line-2);
}

.pa-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--pa-muted);
  font-style: italic;
}

/* ===================== Interactive exercises (sandboxed iframes) ===================== */
.pa-interactive-wrap {
  max-width: var(--pa-read);
  margin: 22px 0;
  padding: 16px 16px 18px;
  background: var(--pa-surface-1);
  border: none;
  border-radius: var(--pa-r-lg);
  box-shadow: var(--pa-sh-sm);
}

.pa-int-title {
  font-weight: 700;
  font-size: 14.5px;
  color: var(--pa-ink);
  margin-bottom: 12px;
}

.pa-interactive {
  width: 100%;
  border: 0;
  border-radius: var(--pa-r-md);
  background: var(--pa-surface-2);
  display: block;
}

/* ===================== Embedded PDF viewer ===================== */
.pa-pdf-wrap {
  max-width: var(--pa-read);
  margin: 22px 0;
  padding: 16px 16px 18px;
  background: var(--pa-surface-1);
  border: none;
  border-radius: var(--pa-r-lg);
  box-shadow: var(--pa-sh-sm);
}

.pa-pdf-title {
  font-weight: 700;
  font-size: 14.5px;
  color: var(--pa-ink);
  margin-bottom: 12px;
}

.pa-pdf-toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.pa-pdf-toolbar a.pa-pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--pa-r-md);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  background: var(--pa-grad);
  color: #fff;
  transition: opacity .15s;
}
.pa-pdf-toolbar a.pa-pdf-btn:hover { opacity: .88; }

.pa-pdf-toolbar a.pa-pdf-btn-ghost {
  background: var(--pa-surface-2);
  color: var(--pa-ink);
  box-shadow: var(--pa-border-inset-2);
}

.pa-pdf-frame {
  width: 100%;
  border: 0;
  border-radius: var(--pa-r-md);
  background: var(--pa-surface-2);
  display: block;
}

.pa-pdf-caption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--pa-muted);
  font-style: italic;
}

/* ===================== PDF library (one shared viewer, clickable doc list) ===================== */
.pa-pdf-lib {
  max-width: var(--pa-read);
  margin: 22px 0;
}

.pa-pdf-lib-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.pa-pdf-lib-item {
  font-family: inherit;
  cursor: pointer;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: var(--pa-surface-1);
  color: var(--pa-ink-soft);
  box-shadow: var(--pa-border-inset-2);
  border: 0;
  transition: color .15s, background .15s, box-shadow .15s;
}
.pa-pdf-lib-item:hover { color: var(--pa-ink); }
.pa-pdf-lib-item.active {
  background: var(--pa-grad);
  color: #fff;
  box-shadow: none;
}

.pa-pdf-lib-viewer {
  padding: 16px 16px 18px;
  background: var(--pa-surface-1);
  border: none;
  border-radius: var(--pa-r-lg);
  box-shadow: var(--pa-sh-sm);
}

.pa-pdf-lib-title {
  font-weight: 700;
  font-size: 14.5px;
  color: var(--pa-ink);
  margin-bottom: 12px;
}

.pa-pdf-lib-caption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--pa-muted);
  font-style: italic;
}

/* ===================== Module completion badges (moved from inline HTML) ===================== */

/* Sidebar: completion ring badges */
.pa-modlist a.done {
  background: linear-gradient(90deg, rgba(31,199,125,.11) 0%, transparent 65%);
  border-color: rgba(31,199,125,.22) !important;
}
.pa-modlist a.done:not(.active)::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  border-radius: 0 3px 3px 0;
  background: #1fc77d;
}
.pa-modlist a.done .mnum {
  border-radius: 50% !important;
  width: 28px !important;
  height: 28px !important;
  background: rgba(31,199,125,.10) !important;
  color: #1fc77d !important;
  border: 2px solid #1fc77d !important;
  font-size: 14px !important;
  line-height: 1 !important;
  box-shadow: 0 0 0 3px rgba(31,199,125,.15), 0 0 12px rgba(31,199,125,.28) !important;
}
.pa-modlist a.done .mname { color: #b8efd6; }
.pa-modlist .mtick { display: none; }

/* Home cards: completion corner seal */
.pa-card:has(.cdone)::before {
  opacity: 1 !important;
  background: linear-gradient(90deg, #1fc77d, #0cd9a0) !important;
}
.pa-card:has(.cdone)::after {
  content: "✓";
  position: absolute;
  top: 11px;
  right: 13px;
  width: 26px;
  height: 26px;
  background: linear-gradient(135deg, #1fc77d, #0acea0);
  border-radius: 50%;
  font-size: 13px;
  font-weight: 900;
  color: #012c18;
  text-align: center;
  line-height: 26px;
  box-shadow: 0 3px 10px rgba(31,199,125,.45), 0 0 0 3px rgba(31,199,125,.14);
}
.pa-card:has(.cdone) {
  border-color: rgba(31,199,125,.26) !important;
  background: linear-gradient(165deg, rgba(31,199,125,.07) 0%, var(--pa-surface-1) 35%) !important;
  box-shadow: 0 0 0 1px rgba(31,199,125,.10), var(--pa-sh-sm) !important;
}
.pa-card:has(.cdone) .cnum { color: #1fc77d; padding-right: 34px; }
.pa-card .cdone {
  background: rgba(31,199,125,.12) !important;
  color: #1fc77d !important;
  font-weight: 700 !important;
  font-size: 11px !important;
  padding: 3px 10px !important;
  border: 1px solid rgba(31,199,125,.28) !important;
  border-radius: 999px !important;
  box-shadow: none !important;
}

/* Light theme overrides for completion indicators */
:root[data-theme="light"] .pa-modlist a.done {
  background: linear-gradient(90deg, rgba(5,150,80,.09) 0%, transparent 65%);
}
:root[data-theme="light"] .pa-modlist a.done .mname { color: #065f3a; }
:root[data-theme="light"] .pa-modlist a.done .mnum {
  background: rgba(5,150,80,.08) !important;
  color: #059950 !important;
  border-color: #059950 !important;
  box-shadow: 0 0 0 3px rgba(5,150,80,.12), 0 0 10px rgba(5,150,80,.15) !important;
}
:root[data-theme="light"] .pa-card:has(.cdone) {
  background: linear-gradient(165deg, rgba(5,150,80,.05) 0%, var(--pa-surface-1) 35%) !important;
}

:root[data-theme="light"] {
  --pa-badge-ink: #fff;
  --pa-hero-text-grad: linear-gradient(135deg, #111827 30%, #4f46e5 100%);
  color-scheme: light;
  --pa-bg: #eef1f8;
  --pa-bg-2: #f6f8fc;
  --pa-surface-1: #ffffff;
  --pa-surface-2: #f3f6fc;
  --pa-surface-3: #e9eef8;
  --pa-elev: #ffffff;

  --pa-topbar-bg: rgba(255, 255, 255, 0.85);
  --pa-sidebar-bg: linear-gradient(180deg, rgba(246, 248, 252, .75), rgba(238, 241, 248, .85));


  --pa-ink: #111827;
  --pa-ink-soft: #374151;
  --pa-muted: #4b5563;
  --pa-faint: #9ca3af;

  --pa-text-primary: var(--pa-ink);
  --pa-text-secondary: var(--pa-muted);

  --pa-line: rgba(18, 22, 45, .10);
  --pa-line-2: rgba(18, 22, 45, .17);

  --pa-brand: #5566e6;
  --pa-brand-2: #8a4fe6;
  --pa-brand-3: #0d8f9b;
  --pa-grad: linear-gradient(135deg, var(--pa-brand) 0%, var(--pa-brand-2) 100%);
  --pa-grad-soft: linear-gradient(135deg, rgba(85, 102, 230, .14), rgba(138, 79, 230, .14));

  --pa-ok: #0f9d6e;
  --pa-ok-bg: rgba(15, 157, 110, .12);
  --pa-ok-line: rgba(15, 157, 110, .34);
  --pa-bad: #e11d48;
  --pa-bad-bg: rgba(225, 29, 72, .10);
  --pa-bad-line: rgba(225, 29, 72, .34);
  --pa-warn: #d97706;
  --pa-warn-bg: rgba(217, 119, 6, .10);
  --pa-warn-line: rgba(217, 119, 6, .34);

  --pa-concept: hsl(190, 100%, 25%);
  --pa-concept-bg: hsla(190, 90%, 40%, 0.08);
  --pa-concept-line: hsla(190, 90%, 40%, 0.30);
  --pa-analogy: hsl(280, 70%, 40%);
  --pa-analogy-bg: hsla(280, 80%, 60%, 0.08);
  --pa-analogy-line: hsla(280, 80%, 60%, 0.30);

  --pa-scenario-ink: #12172b;
  --pa-recap-th-ink: #2a315a;
  --pa-tag-ink: #3c3f8e;
  --pa-tag-bg: rgba(85, 102, 230, .12);
  --pa-tag-line: rgba(85, 102, 230, .28);
  --pa-hint-ink: #7c2d12;
  --pa-bp-ink: #0a4a30;
  --pa-bp-ink-b: #06311f;
  --pa-qtype-ink: #3a4170;
  --pa-opt-key-bg: rgba(18, 22, 45, .04);
  --pa-opt-key-ink: #3a4170;
  --pa-opt-sel-bg: rgba(85, 102, 230, .08);
  --pa-empty-code-bg: rgba(18, 22, 45, .05);
  --pa-empty-code-ink: #2a315a;
  --pa-active-mod-ink: #1b2140;

  --pa-border-inset: inset 0 0 0 1px rgba(18, 22, 45, .10);
  --pa-border-inset-2: inset 0 0 0 1px rgba(18, 22, 45, .17);

  --pa-sh-sm: 0 1px 2px rgba(18, 22, 45, .06), 0 1px 1px rgba(18, 22, 45, .04), var(--pa-border-inset);
  --pa-sh-md: 0 8px 22px rgba(18, 22, 45, .10), 0 2px 6px rgba(18, 22, 45, .06), var(--pa-border-inset);
  --pa-sh-lg: 0 20px 50px rgba(18, 22, 45, .16), 0 6px 16px rgba(18, 22, 45, .10), var(--pa-border-inset-2);

  /* Hero: rich gradients for light mode */
  --pa-hero-bg:
    radial-gradient(800px 280px at 10% -50%, rgba(85, 102, 230, .18), transparent 70%),
    radial-gradient(600px 280px at 90% 140%, rgba(138, 79, 230, .15), transparent 70%),
    linear-gradient(180deg, var(--pa-surface-1), var(--pa-bg-2));
}