/* Generated Mathematics critical CSS: KaTeX + reader + weak-network performance. */
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(max-width:1100px){.physics-reader-shell{grid-template-columns:320px minmax(0,1fr)}.physics-main{padding-inline:22px}}@media (max-width:900px){.physics-reader-shell{display:block;padding-top:0}.physics-sidebar{position:fixed;top:0;left:0;width:min(88vw,360px);height:100vh;padding:10px;transform:translateX(-105%);background:rgba(5,9,20,.98)}.physics-sidebar.is-open{transform:translateX(0)}.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.62);z-index:40}.sidebar-overlay.is-open{display:block}.mobile-browse{display:inline-flex;align-items:center;gap:8px}.physics-main{padding:18px 14px 90px}.lesson-hero,.physics-home-hero{border-radius:24px;padding:22px}.lesson-title-row h1,.physics-home-hero h1{font-size:44px}.objective-header{grid-template-columns:1fr auto}.objective-number{grid-column:1/-1}.note-content{font-size:16px}.hero-grid{grid-template-columns:1fr}.browser-head{display:block}.home-search{margin-top:12px;width:100%}.unit-lessons{grid-template-columns:1fr;padding:0 12px 14px}.physics-home-shell{padding:24px 12px 80px}.physics-sidebar.is-collapsed{width:min(88vw,360px)}.physics-sidebar.is-collapsed .logo-text,.physics-sidebar.is-collapsed .sidebar-search,.physics-sidebar.is-collapsed .physics-tree{display:flex}.physics-sidebar.is-collapsed .physics-tree{display:block}.physics-sidebar.is-collapsed .sidebar-top{flex-direction:row}}@media (max-width:520px){.lesson-title-row h1,.physics-home-hero h1{font-size:38px}.primary-action,.stat-pill{width:100%;justify-content:center}.lesson-nav{flex-direction:column}.objective-title{font-size:16px}.tree-section-btn b{font-size:13px}}


/* AceBGCSE precision patch: sidebar collapse uses zero layout space; Notion math is preserved */
.physics-reader-shell{transition:grid-template-columns .24s ease!important;}
.physics-reader-shell.sidebar-collapsed{grid-template-columns:0 minmax(0,1fr)!important;}
.physics-reader-shell.sidebar-collapsed .physics-main{max-width:1180px!important;margin-left:auto!important;margin-right:auto!important;}
.physics-sidebar.is-collapsed{width:0!important;min-width:0!important;max-width:0!important;padding:0!important;border-right:0!important;overflow:hidden!important;pointer-events:none!important;}
.physics-sidebar.is-collapsed .sidebar-shell{opacity:0!important;transform:translateX(-18px)!important;}
.sidebar-reopen{position:fixed;left:16px;top:88px;z-index:85;width:44px;height:44px;display:none;align-items:center;justify-content:center;border-radius:15px;border:1px solid rgba(0,229,255,.35);background:rgba(7,20,38,.94);color:#00e5ff;box-shadow:0 18px 45px rgba(0,0,0,.35);cursor:pointer;}
.sidebar-reopen.is-visible{display:flex;}
.sidebar-reopen:hover{background:rgba(0,229,255,.12);}

.note-content .notion-text-equation-token,.objective-title .notion-text-equation-token,.tree-objective .notion-text-equation-token{display:inline-flex!important;align-items:center!important;vertical-align:-0.16em!important;max-width:100%;white-space:normal!important;}
.note-content .katex,.objective-title .katex,.tree-objective .katex{font-size:1.04em!important;line-height:1.2!important;color:inherit!important;}
.objective-title .katex{font-size:.98em!important;}.tree-objective .katex{font-size:.92em!important;}
.note-content .katex-display,.note-content figure.equation .katex-display,.note-content .equation-container .katex-display{display:block!important;margin:1.05rem auto!important;text-align:center!important;overflow-x:auto!important;overflow-y:hidden!important;padding:.25rem 0!important;}
.note-content figure.equation,.note-content .equation-container{display:block!important;text-align:center!important;}
.note-content math[display="block"]{display:block;margin:1rem auto;}.note-content math:not([display="block"]),.objective-title math,.tree-objective math{display:inline math;}
.katex .katex-mathml{position:absolute!important;clip:rect(1px,1px,1px,1px)!important;padding:0!important;border:0!important;height:1px!important;width:1px!important;overflow:hidden!important;}
.katex .katex-html{display:inline-block!important;}.katex-display>.katex{display:inline-block!important;text-align:initial!important;}
@media (max-width:900px){.physics-reader-shell.sidebar-collapsed{display:block!important}.sidebar-reopen{display:none!important}}

/* AceBGCSE elite precision fix 2026-06-27: true full-width collapse + Notion-faithful math */
.physics-reader-shell{
  width:100%;
  min-height:100vh;
  transition:grid-template-columns .26s cubic-bezier(.2,.8,.2,1);
}
.physics-reader-shell.sidebar-collapsed{
  grid-template-columns:0 minmax(0,1fr)!important;
}
.physics-reader-shell.sidebar-collapsed .physics-main{
  max-width:none!important;
  width:100%!important;
  margin:0!important;
  padding-left:clamp(22px,4.6vw,86px)!important;
  padding-right:clamp(22px,4.6vw,86px)!important;
}
.physics-reader-shell.sidebar-collapsed .lesson-hero,
.physics-reader-shell.sidebar-collapsed .objective-panel,
.physics-reader-shell.sidebar-collapsed .lesson-nav{
  width:100%!important;
  max-width:none!important;
}
.physics-reader-shell.sidebar-collapsed .note-content{
  max-width:none!important;
}
.physics-sidebar.is-collapsed{
  width:0!important;
  min-width:0!important;
  max-width:0!important;
  padding:0!important;
  border:0!important;
  opacity:0!important;
  visibility:hidden!important;
  overflow:hidden!important;
  pointer-events:none!important;
}
.physics-sidebar.is-collapsed .sidebar-shell{display:none!important;}
.sidebar-reopen{
  position:fixed!important;
  left:18px!important;
  top:88px!important;
  z-index:120!important;
  width:46px!important;
  height:46px!important;
  border-radius:16px!important;
  border:1px solid rgba(0,229,255,.42)!important;
  background:linear-gradient(135deg,rgba(7,20,38,.98),rgba(12,24,44,.96))!important;
  color:#00e5ff!important;
  box-shadow:0 18px 45px rgba(0,0,0,.40)!important;
}
.sidebar-reopen.is-visible{display:flex!important;align-items:center!important;justify-content:center!important;}

/* Preserve Notion / KaTeX math instead of flattening equations */
.note-content figure.equation,
.note-content .equation-container{
  display:block!important;
  text-align:center!important;
  width:100%!important;
}
.note-content figure.equation{
  margin:1.15rem 0!important;
  padding:18px 16px!important;
  border-radius:18px!important;
  border:1px solid rgba(0,229,255,.18)!important;
  background:rgba(1,12,24,.45)!important;
  overflow-x:auto!important;
  overflow-y:hidden!important;
}
.note-content .katex-display{
  display:block!important;
  margin:.45rem auto!important;
  text-align:center!important;
  overflow-x:auto!important;
  overflow-y:hidden!important;
  max-width:100%!important;
}
.note-content .katex-display > .katex{
  display:inline-block!important;
  text-align:initial!important;
  white-space:nowrap!important;
  font-size:1.18em!important;
}
.note-content .notion-text-equation-token,
.objective-title .notion-text-equation-token{
  display:inline-block!important;
  vertical-align:-.18em!important;
  line-height:1!important;
  white-space:nowrap!important;
  max-width:100%;
}
.note-content .notion-text-equation-token .katex,
.objective-title .notion-text-equation-token .katex{
  font-size:1em!important;
  line-height:1!important;
}
.note-content .katex-mathml,
.objective-title .katex-mathml,
.tree-objective .katex-mathml{
  position:absolute!important;
  clip:rect(1px,1px,1px,1px)!important;
  padding:0!important;
  border:0!important;
  height:1px!important;
  width:1px!important;
  overflow:hidden!important;
}
.note-content .katex-html,
.objective-title .katex-html{
  display:inline-block!important;
}
.note-content math[display="block"]{
  display:block!important;
  margin:.8rem auto!important;
  text-align:center!important;
}
.note-content math:not([display="block"]),
.objective-title math{
  display:inline math!important;
}

/* Left explorer: compact formulas so narrow sidebar never breaks equations into visual garbage */
.tree-objective .notion-text-equation-token,
.tree-objective .ace-sidebar-formula{
  display:inline!important;
  white-space:nowrap!important;
  font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif!important;
  font-size:.96em!important;
  color:#dff8ff!important;
  font-weight:800!important;
}
.tree-objective .notion-text-equation-token .katex,
.tree-objective .notion-text-equation-token .katex-html,
.tree-objective .notion-text-equation-token math{
  font-size:.92em!important;
}

@media (min-width:901px){
  .physics-main{transition:max-width .26s cubic-bezier(.2,.8,.2,1), padding .26s cubic-bezier(.2,.8,.2,1), margin .26s cubic-bezier(.2,.8,.2,1);}
}
@media (max-width:900px){
  .physics-reader-shell.sidebar-collapsed{display:block!important;}
  .physics-reader-shell.sidebar-collapsed .physics-main{padding-left:14px!important;padding-right:14px!important;}
}


/* AceBGCSE reader global navigation: slim site nav + reader controls */
.ace-reader-topnav{
  position:fixed;top:0;left:0;right:0;z-index:110;height:72px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:0 clamp(14px,3vw,34px);
  background:rgba(5,9,20,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(255,255,255,.10);
  box-shadow:0 12px 34px rgba(0,0,0,.28);
}
.ace-reader-brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:900;letter-spacing:-.03em;white-space:nowrap;}
.ace-reader-brand-mark{width:34px;height:34px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#25e6ff,#5b7cff);color:#031017;font-weight:950;box-shadow:0 0 22px rgba(0,229,255,.26);}
.ace-reader-brand span:last-child{font-size:18px}.ace-reader-brand b{color:#00e5ff;}
.ace-reader-links{display:flex;align-items:center;justify-content:center;gap:6px;min-width:0;}
.ace-reader-links a,.ace-reader-action{
  height:40px;display:inline-flex;align-items:center;gap:8px;border-radius:13px;
  padding:0 13px;color:#dbe7f7;text-decoration:none;font-size:14px;font-weight:800;
  border:1px solid transparent;background:transparent;white-space:nowrap;cursor:pointer;
}
.ace-reader-links a:hover,.ace-reader-action:hover{color:#fff;background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.10)}
.ace-reader-links svg,.ace-reader-action svg{width:17px;height:17px;flex:0 0 auto;}
.ace-reader-actions{display:flex;align-items:center;gap:8px;}
.ace-reader-action{background:rgba(0,229,255,.10);border-color:rgba(0,229,255,.24);color:#9ff7ff;}
.ace-reader-action.primary{background:linear-gradient(135deg,#13dff4,#00d4aa);color:#04131a;border-color:transparent;box-shadow:0 12px 26px rgba(0,229,255,.18)}
.ace-reader-action.primary:hover{filter:brightness(1.05);color:#04131a;}
.ace-reader-mobile-label{display:none;}
.physics-home-shell{padding-top:104px!important;}
@media (max-width:900px){
  .ace-reader-topnav{height:64px;padding:0 10px;gap:8px;}
  .ace-reader-brand span:last-child{display:none;}
  .ace-reader-links{gap:2px;}
  .ace-reader-links a{padding:0 9px;font-size:0;}
  .ace-reader-links a svg{width:19px;height:19px;}
  .ace-reader-actions{gap:6px;}
  .ace-reader-action{height:38px;padding:0 10px;font-size:0;}
  .ace-reader-action svg{width:19px;height:19px;}
  .ace-reader-mobile-label{display:inline;font-size:13px;}
  .physics-reader-shell{padding-top:64px!important;}
  .physics-sidebar{z-index:150!important;}
  .sidebar-overlay{z-index:140!important;}
  .physics-home-shell{padding-top:84px!important;}
}
@media (max-width:520px){
  .ace-reader-links a[href='/pricing.html']{display:none;}
  .ace-reader-links a[href='/dashboard.html'] span{display:none;}
}

/* AceBGCSE hotfix: keep closed Physics accordions truly closed */
.tree-section:not(.is-open) .tree-section-body{display:none!important;}
.tree-section.is-open .tree-section-body{display:block!important;}
.course-unit.is-closed .unit-lessons{display:none!important;}
:root {
  --cyan: #60a5fa;
  --green: #34d399;
  --blue: #8b5cf6;
  --line2: rgba(96, 165, 250, .28);
}

.physics-body {
  background:
    radial-gradient(circle at 10% 0%, rgba(59, 130, 246, .18), transparent 31%),
    radial-gradient(circle at 92% 14%, rgba(139, 92, 246, .13), transparent 27%),
    linear-gradient(135deg, #050914, #09061c 63%, #07111e);
}

.logo-mark,
.ace-reader-brand-mark {
  background: linear-gradient(135deg, #60a5fa, #8b5cf6 58%, #34d399);
}

.lesson-title-row h1,
.physics-home-hero h1 {
  background: linear-gradient(90deg, #fff, #93c5fd, #a78bfa, #6ee7b7);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.math-course-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.math-course-switch a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: #dbeafe;
  text-decoration: none;
  background: rgba(255,255,255,.045);
  font-weight: 800;
}

.math-course-switch a.is-active {
  color: #06101f;
  border-color: transparent;
  background: linear-gradient(135deg, #93c5fd, #6ee7b7);
}

.math-core-foundation {
  margin: 18px 0;
  padding: 18px 20px;
  border: 1px solid rgba(52, 211, 153, .28);
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(52, 211, 153, .10), rgba(96, 165, 250, .06));
}

.math-core-foundation strong { color: #a7f3d0; }
.math-core-foundation a { color: #bfdbfe; font-weight: 800; }

.math-loading,
.math-error {
  min-height: 220px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(8, 14, 28, .82);
  color: var(--muted);
}

.math-loading::before {
  content: '';
  width: 34px;
  height: 34px;
  border: 3px solid rgba(147, 197, 253, .20);
  border-top-color: #93c5fd;
  border-radius: 999px;
  animation: math-spin .8s linear infinite;
}

@keyframes math-spin { to { transform: rotate(360deg); } }

.math-error h2 { color: #fff; margin: 0 0 8px; }
.math-error a { color: #93c5fd; font-weight: 800; }

.note-content details.math-solutions {
  margin: 22px 0;
  border: 1px solid rgba(52, 211, 153, .28);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(52, 211, 153, .055);
}

.note-content details.math-solutions > summary {
  cursor: pointer;
  padding: 15px 18px;
  font-weight: 900;
  color: #a7f3d0;
  background: rgba(52, 211, 153, .08);
  list-style: none;
}

.note-content details.math-solutions > summary::-webkit-details-marker { display: none; }
.note-content details.math-solutions > .math-solutions-body { padding: 4px 18px 18px; }

.note-content .math-display,
.note-content .math-inline {
  font-family: 'Cambria Math', 'Times New Roman', serif;
}

.note-content .math-display {
  display: block;
  overflow-x: auto;
  margin: 18px 0;
  padding: 16px;
  text-align: center;
  border: 1px solid rgba(96, 165, 250, .20);
  border-radius: 16px;
  background: rgba(1, 10, 25, .45);
}

.note-content .math-inline { white-space: nowrap; color: #f8fbff; }
.note-content .math-fallback { white-space: pre-wrap; color: #dbeafe; }

.note-content .task-list {
  list-style: none;
  padding-left: 0;
}

.note-content .task-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.note-content .task-list input {
  margin-top: .55em;
  accent-color: #60a5fa;
}

.note-content table { min-width: 620px; }
.note-content .table-scroll { overflow-x: auto; margin: 18px 0; }
.note-content .table-scroll table { margin: 0; }
.note-content .insert-diagram {
  padding: 16px 18px;
  border: 1px dashed rgba(167, 139, 250, .45);
  border-radius: 16px;
  color: #c4b5fd;
  background: rgba(139, 92, 246, .08);
  font-weight: 800;
}

@media (max-width: 900px) {
  .math-course-switch a { flex: 1; justify-content: center; }
  .note-content table { min-width: 540px; }
}
/* Rendering-only performance improvements. No note content is changed. */

#mathLessonContent .objective-panel {
  content-visibility: auto;
  contain-intrinsic-size: 1px 900px;
}

#mathLessonContent .math-solutions-body,
#mathLessonContent .table-scroll,
#mathLessonContent .insert-diagram {
  content-visibility: auto;
  contain-intrinsic-size: 1px 500px;
}

#mathLessonContent img {
  content-visibility: auto;
  contain-intrinsic-size: 640px 360px;
}

@media (prefers-reduced-motion: reduce) {
  .math-loading::before {
    animation-duration: 1.6s;
  }
}