/* User: Ceasar | Story: #0 | Date: 2026-11-12 | Change: Style the responsive React study explorer and navigation in the approved PBR design. */
/* User: Ceasar | Story: #0 | Date: 2026-11-14 | Change: Keep React navigation and account actions inside narrow mobile headers. */
.pbr-spa-header :focus-visible,.pbr-spa-sidebar :focus-visible,.pbr-study-workspace :focus-visible,.pbr-syllabus-explorer :focus-visible { outline:3px solid #237883; outline-offset:3px; }
.pbr-spa-mounted { --pbr-app-header: 72px; --pbr-app-sidebar: 232px; }
.pbr-spa-skip { position:fixed; top:-80px; left:12px; z-index:999; padding:10px; background:#fff; color:#07183d; }
.pbr-spa-skip:focus { top:8px; }
.pbr-spa-mounted.pbr-spa-guest { --pbr-app-sidebar: 0px; }
.pbr-spa-mounted #pbr-react-shell { padding: 0; }
.pbr-spa-mounted #pbr-page-outlet { box-sizing: border-box; width: 100%; max-width: none; margin: 0; background: var(--revamp-canvas, #f8f7f2); padding: calc(var(--pbr-app-header) + var(--site-notice-height, 0px) + 28px) 28px 40px calc(var(--pbr-app-sidebar) + 28px); }
.pbr-spa-mounted .site-notifications { position:fixed; top:var(--pbr-app-header); left:var(--pbr-app-sidebar); right:0; z-index:170; }
.pbr-spa-mounted #pbr-page-outlet > [data-pbr-route-host] { min-width: 0; }
.pbr-spa-header { position: fixed; inset: 0 0 auto; z-index: 180; display: flex; align-items: center; gap: 24px; height: var(--pbr-app-header, 72px); padding: 0 28px; background: #07183d; color: #fff; border-bottom: 1px solid #d7ad4852; box-shadow: 0 2px 9px #07183d12; }
.pbr-spa-brand { display: flex; align-items: center; gap: 15px; min-width: 200px; color: #fff; text-decoration: none; }
.pbr-spa-brand strong { font-family: Georgia, serif; color: #d7ad48; font-size: 32px; line-height: 1; letter-spacing: -.03em; }
.pbr-spa-brand span { max-width: 185px; font-size: 12px; line-height: 1.3; font-weight: 750; }
.pbr-spa-topnav { display: flex; align-self: stretch; align-items: stretch; gap: 18px; margin-left: auto; }
.pbr-spa-topnav a { display: flex; align-items: center; position: relative; color: #fff; text-decoration: none; white-space: nowrap; font-size: 11px; font-weight: 600; opacity: .85; }
.pbr-spa-topnav a[aria-current], .pbr-spa-topnav a:hover { opacity: 1; }
.pbr-spa-topnav a[aria-current]::after { content: ''; position: absolute; height: 3px; background: #d7ad48; bottom: 0; left: 0; right: 0; }
.pbr-spa-account { position: relative; flex-shrink: 0; }
.pbr-spa-account > button, .pbr-spa-menu-toggle { min-height: 38px; border: 1px solid #ffffff38; border-radius: 6px; color: #fff; background: #ffffff09; padding: 7px 12px; font: inherit; font-size: 12px; cursor: pointer; }
.pbr-spa-account > nav { position: absolute; top: calc(100% + 12px); right: 0; min-width: 225px; padding: 10px; border: 1px solid var(--border, #dce1e7); border-radius: 10px; background: var(--surface, #fff); color: var(--text, #07183d); box-shadow: 0 10px 30px #07183d21; }
.pbr-spa-account > nav a, .pbr-spa-account > nav form button { display: block; width: 100%; padding: 10px; color: var(--text, #07183d); background: transparent; font: inherit; font-size: 13px; border: 0; border-radius: 5px; text-decoration: none; text-align: left; cursor: pointer; }
.pbr-spa-account > nav p { margin: 0 0 8px; padding: 10px; font-size: 13px; font-weight: 700; border-bottom: 1px solid var(--border, #dce1e7); }
.pbr-spa-account > nav small { display: block; margin-top: 4px; font-size: 11px; color: var(--text-muted, #526173); font-weight: 400; }
.pbr-spa-account > nav a:hover, .pbr-spa-account > nav form button:hover { background: var(--bg, #f8f7f2); }
.pbr-spa-menu-toggle { display: none; margin-left: auto; }
.pbr-spa-sidebar { position: fixed; top: var(--pbr-app-header, 72px); bottom: 0; left: 0; width: var(--pbr-app-sidebar, 232px); box-sizing: border-box; padding: 24px 14px 30px; z-index: 120; overflow-y: auto; border-right: 1px solid var(--border, #dce1e7); background: var(--surface, #fff); color: var(--text, #07183d); }
.pbr-spa-sidebar.is-guest { display: none; }
.pbr-spa-season { padding: 0 12px 20px; margin: 0 0 14px; border-bottom: 1px solid var(--border, #dce1e7); color: var(--text, #07183d); font-size: 13px; font-weight: 800; letter-spacing: .025em; }
.pbr-spa-season span { display: block; margin-top: 6px; font-size: 11px; font-weight: 400; letter-spacing: 0; color: var(--text-muted, #526173); }
.pbr-spa-sidebar nav { display: grid; gap: 5px; }
.pbr-spa-nav-label { flex:1; }
.pbr-spa-sidebar nav svg { flex-shrink:0; }
.pbr-spa-workspace-switch summary { padding:10px 12px; font-size:12px; cursor:pointer; color:var(--text-muted,#526173); }
.pbr-spa-workspace-switch + .pbr-spa-context-group { margin-top:12px; padding-top:12px; }
.pbr-spa-sidebar nav a { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 11px 12px; border-radius: 6px; color: var(--text, #07183d); font-size: 12px; text-decoration: none; line-height: 1.5; }
.pbr-spa-sidebar nav a:hover { background: var(--bg, #f8f7f2); }
.pbr-spa-sidebar nav a[aria-current] { background: #23788318; color: var(--text, #07183d); font-weight: 750; box-shadow: inset 3px 0 #237883; }
.pbr-spa-sidebar nav a small { padding: 2px 5px; background: #f7e9c5; border-radius: 4px; color: #6e4b0a; font-size: 9px; }
.pbr-spa-plan { padding: 16px 12px; margin-top: 28px; border: 1px solid var(--border, #dce1e7); border-radius: 8px; background: var(--bg, #f8f7f2); }
.pbr-spa-plan strong { font-size: 12px; }
.pbr-spa-plan p { margin: 7px 0 12px; font-size: 11px; line-height: 1.6; color: var(--text-muted, #526173); }
.pbr-spa-plan button { border: 0; border-radius: 5px; padding: 9px 11px; background: #237883; color: #fff; font: inherit; font-size: 11px; cursor: pointer; }
.pbr-spa-theme { display: grid; gap: 7px; margin: 24px 12px 0; color: var(--text-muted, #526173); font-size: 10px; }
.pbr-spa-theme select { padding: 8px; border: 1px solid var(--border, #dce1e7); border-radius: 5px; font: inherit; color: var(--text, #07183d); background: var(--surface, #fff); }
.pbr-spa-context-group { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--border, #dce1e7); }
.pbr-spa-context-group h2 { margin: 0 12px 8px; font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; }
.pbr-spa-context-group > p { margin: 0 12px 12px; font-size: 10px; line-height: 1.6; color: var(--text-muted, #526173); }
.pbr-spa-unified-context { grid-template-columns: minmax(0, 1fr) !important; }
.pbr-spa-route-status { position: fixed; top: var(--pbr-app-header, 72px); left: var(--pbr-app-sidebar, 232px); right: 0; z-index: 155; overflow: hidden; height: 0; background: var(--surface, #fff); color: var(--text-muted, #526173); font-size: 11px; }
.pbr-spa-route-status.is-pending { height: auto; padding: 8px 28px; border-bottom: 2px solid #237883; }
.pbr-spa-route-error { position: fixed; top: calc(var(--pbr-app-header, 72px) + 12px); left: calc(var(--pbr-app-sidebar, 232px) + 24px); right: 24px; z-index: 190; padding: 16px; border: 1px solid #bd8730; border-radius: 8px; background: var(--surface, #fff); color: var(--text, #07183d); font-size: 13px; box-shadow: 0 6px 24px #07183d20; }
.pbr-spa-route-error button { float: right; margin-left: 14px; cursor: pointer; }
@media (max-width: 1150px) { .pbr-spa-topnav { gap: 12px; } .pbr-spa-brand span { display: none; } .pbr-spa-brand { min-width: 80px; } }
@media (max-width: 860px) {
  .pbr-spa-mounted { --pbr-app-header: 64px; --pbr-app-sidebar: 0px; }
  .pbr-spa-header { padding: 0 16px; gap: 12px; }
  .pbr-spa-brand span { display: block; font-size: 10px; max-width: 120px; }
  .pbr-spa-brand strong { font-size: 28px; }
  .pbr-spa-topnav { display: none; }
  .pbr-spa-menu-toggle { display: block; }
  .pbr-spa-sidebar, .pbr-spa-sidebar.is-guest { display: none; width: min(300px, 90vw); box-shadow: 12px 0 32px #07183d20; }
  .pbr-spa-sidebar.is-open { display: block; }
  .pbr-spa-mounted #pbr-page-outlet { padding: calc(var(--pbr-app-header) + var(--site-notice-height, 0px) + 20px) 16px 36px; }
  .pbr-spa-route-status { left: 0; }
  .pbr-spa-route-error { left: 12px; right: 12px; }
}
.pbr-study-workspace { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 28px; max-width: 1512px; margin: 0 auto; align-items: start; }
.pbr-study-outline { position: sticky; top: 96px; max-height: calc(100vh - 120px); overflow: auto; border: 1px solid var(--border, #dde2e8); background: var(--surface, #fff); border-radius: 12px; padding: 16px 12px; }
.pbr-study-outline__heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 4px 9px 18px; margin-bottom: 10px; border-bottom: 1px solid var(--border, #dde2e8); }
.pbr-study-outline__heading > a { font-weight: 800; font-size: .85rem; color: var(--text, #07183d); text-decoration: none; }
.pbr-study-outline ul { padding: 0; margin: 0; list-style: none; }
.pbr-study-outline ul ul { border-left: 1px solid var(--border, #dde2e8); margin: 4px 0 8px 13px; padding-left: 7px; }
.pbr-study-outline li { margin: 2px 0; }
.pbr-study-outline li a { display: flex; justify-content: space-between; gap: 8px; padding: 9px; border-radius: 6px; font-size: .78rem; line-height: 1.5; text-decoration: none; color: var(--text-muted, #526078); overflow-wrap: anywhere; }
.pbr-study-outline li a:hover { background: var(--bg, #f8f7f2); color: var(--text, #07183d); }
.pbr-study-outline li a.is-current, .pbr-study-outline li a[aria-current="page"] { background: #23788315; color: var(--text, #07183d); font-weight: 750; box-shadow: inset 3px 0 #237883; }
.pbr-study-outline li a > span { font-size: .7rem; color: var(--text-muted, #526078); flex-shrink: 0; }
.pbr-study-outline summary { display: list-item; cursor: pointer; margin-left: 13px; }
.pbr-study-outline summary a { display: inline; padding: 6px 4px; }
.pbr-study-outline__all { display: block; padding: 15px 9px 3px; font-size: .78rem; font-weight: 700; }
.pbr-study-outline__toggle, .pbr-study-outline__close { display: none; }
.pbr-study-reader.study-public { min-width: 0; width: 100%; padding-top: 0; }
.pbr-study-reader__toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 18px; color: var(--text-muted, #526078); font-size: .78rem; }
.pbr-study-reader__toolbar a { color: var(--text-muted, #526078); text-decoration: none; }
.pbr-study-reader__toolbar > span { text-transform: uppercase; letter-spacing: .08em; font-size: .68rem; border: 1px solid var(--border, #dde2e8); padding: 4px 8px; border-radius: 4px; }
.pbr-study-reader .study-public__breadcrumbs { margin-bottom: 18px; }
.pbr-study-reader .study-public__hero { padding: 28px 32px; border-radius: 12px; }
.pbr-study-reader h1 { font-size: clamp(1.65rem, 2.7vw, 2.6rem); max-width: 38ch; }
.pbr-study-reader .study-public__intro { font-size: .95rem; }
.pbr-study-reader .study-public__section { margin-top: 28px; }
.pbr-study-reader .study-public__section h2 { font-size: 1.2rem; }
.pbr-study-reader .study-public__card { padding: 22px; box-shadow: 0 2px 5px #07183d03; }
.pbr-study-reader .study-public__card h3 { font-size: .95rem; }
.pbr-study-reader .study-public__card .btn { font-size: .76rem; padding: 9px 12px; min-height: 38px; }
.pbr-study-reader .study-public__question-text { white-space: pre-line; }
.pbr-study-tabs { display: flex; gap: 4px; padding: 5px; margin-top: 22px; border: 1px solid var(--border, #dde2e8); border-radius: 9px; background: var(--surface, #fff); }
.pbr-study-tabs button { border: 0; background: transparent; font: inherit; font-size: .8rem; padding: 10px 18px; border-radius: 6px; color: var(--text-muted, #526078); cursor: pointer; }
.pbr-study-tabs button.is-active { background: #237883; color: #fff; }
.pbr-study-filter { display: grid; gap: 7px; font-size: .78rem; font-weight: 650; }
.pbr-study-filter input { border: 1px solid var(--border, #dde2e8); border-radius: 7px; padding: 11px 12px; color: var(--text, #07183d); background: var(--surface, #fff); font: inherit; font-weight: 400; }
.pbr-study-result-count { color: var(--text-muted, #526078); font-size: .75rem; margin: 12px 0; }
.pbr-study-reader .study-public__question-list { list-style: none; margin: 0; padding: 0; border: 1px solid var(--border, #dde2e8); border-radius: 10px; background: var(--surface, #fff); overflow: hidden; }
.pbr-study-reader .study-public__question-list li { display: flex; align-items: start; gap: 14px; padding: 18px; font-size: .86rem; }
.pbr-study-reader .study-public__question-list li:last-child { border-bottom: 0; }
.pbr-study-reader .study-public__question-list li a { flex: 1; }
.pbr-study-question-number { border: 1px solid var(--border, #dde2e8); border-radius: 5px; min-width: 28px; padding: 0 5px; text-align: center; color: var(--text-muted, #526078); }
.pbr-study-question-content { flex: 1; min-width: 0; }
.pbr-study-question-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.pbr-study-question-tags span { border: 1px solid var(--border, #dde2e8); border-radius: 4px; padding: 2px 7px; color: var(--text-muted, #526078); font-size: .67rem; }
.pbr-study-question-filters { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.pbr-study-question-filters label { display: grid; gap: 7px; font-size: .76rem; font-weight: 650; }
.pbr-study-question-filters select { padding: 9px 12px; font: inherit; font-weight: 400; color: var(--text, #07183d); background: var(--surface, #fff); border: 1px solid var(--border, #dde2e8); border-radius: 7px; }
.pbr-syllabus-explorer { margin: 28px 0; padding: 28px; border: 1px solid var(--border, #dde2e8); border-radius: 14px; color: var(--text, #07183d); background: var(--surface, #fff); }
.pbr-syllabus-explorer__heading { display: flex; justify-content: space-between; gap: 18px; align-items: start; }
.pbr-syllabus-explorer__heading h2 { font-size: clamp(1.35rem, 2vw, 1.85rem); margin: 0 0 10px; letter-spacing: -.025em; }
.pbr-syllabus-explorer__heading p:last-child { color: var(--text-muted, #526078); font-size: .88rem; line-height: 1.6; }
.pbr-syllabus-explorer__edition { padding: 6px 10px; border-radius: 5px; background: #f7e9c5; color: #6e4b0a; font-size: .72rem; font-weight: 800; }
.pbr-syllabus-explorer__filters { display: flex; flex-wrap: wrap; align-items: end; gap: 14px; padding: 16px 0 8px; }
.pbr-syllabus-explorer__filters label { display: grid; flex: 1 1 240px; gap: 7px; font-size: .76rem; font-weight: 650; }
.pbr-syllabus-explorer__filters label:first-child { flex-grow: 2; }
.pbr-syllabus-explorer__filters input, .pbr-syllabus-explorer__filters select { min-width: 0; width: 100%; padding: 12px; font: inherit; font-weight: 400; color: var(--text, #07183d); background: var(--bg, #f8f7f2); border: 1px solid var(--border, #dde2e8); border-radius: 7px; }
.pbr-syllabus-explorer__groups { display: grid; gap: 12px; }
.pbr-syllabus-subject { border: 1px solid var(--border, #dde2e8); border-radius: 9px; overflow: hidden; }
.pbr-syllabus-subject__heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 18px 8px; }
.pbr-syllabus-subject__heading button { display: flex; align-items: center; gap: 12px; padding: 0; border: 0; background: transparent; color: var(--text, #07183d); font: inherit; font-size: .9rem; font-weight: 750; text-align: left; cursor: pointer; }
.pbr-syllabus-subject__heading button > span:first-child { display: grid; place-items: center; min-width: 25px; height: 25px; border-radius: 5px; background: #23788312; color: var(--text, #07183d); }
.pbr-syllabus-subject__heading > a { flex-shrink: 0; font-size: .75rem; text-decoration: none; }
.pbr-syllabus-subject__stats { display: flex; flex-wrap: wrap; gap: 14px; padding: 0 18px 14px 55px; color: var(--text-muted, #526078); font-size: .72rem; }
.pbr-syllabus-topics { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--border, #dde2e8); }
.pbr-syllabus-topics li { display: flex; align-items: center; gap: 12px; padding: 13px 18px; border-bottom: 1px solid var(--border, #dde2e8); }
.pbr-syllabus-topics li:last-child { border-bottom: 0; }
.pbr-syllabus-topics a { flex: 1; display: grid; gap: 4px; font-size: .8rem; font-weight: 650; text-decoration: none; color: var(--text, #07183d); overflow-wrap: anywhere; }
.pbr-syllabus-topics small { font-weight: 400; font-size: .7rem; color: var(--text-muted, #526078); line-height: 1.5; }
.pbr-syllabus-topics__count { font-size: .7rem; color: var(--text-muted, #526078); white-space: nowrap; }
.pbr-topic-practiced, .pbr-topic-unexplored { border-radius: 4px; padding: 4px 6px; font-size: .65rem; }
.pbr-topic-practiced { background: #23788318; color: var(--text, #07183d); }
.pbr-topic-unexplored { background: var(--bg, #f8f7f2); color: var(--text-muted, #526078); }
@media (max-width: 1050px) {
  .pbr-study-workspace { grid-template-columns: 220px minmax(0, 1fr); gap: 18px; }
  .pbr-study-reader .study-public__grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  .pbr-study-workspace { display: block; }
  .pbr-study-outline { position: static; display: none; max-height: none; margin-bottom: 18px; }
  .pbr-study-outline.is-open { display: block; }
  .pbr-study-outline__toggle, .pbr-study-outline__close { display: inline-flex; min-height: 40px; font-size: .72rem; }
  .pbr-study-reader__toolbar > span { display: none; }
  .pbr-study-reader .study-public__hero { padding: 22px; }
  .pbr-study-reader h1 { font-size: 1.75rem; }
  .pbr-study-tabs button { flex: 1; padding: 10px 8px; }
  .pbr-syllabus-explorer { padding: 20px 14px; }
  .pbr-syllabus-subject__heading { align-items: start; flex-direction: column; padding: 14px; }
  .pbr-syllabus-subject__heading > a { margin-left: 37px; }
  .pbr-syllabus-subject__stats { padding-left: 51px; }
  .pbr-syllabus-topics li { flex-wrap: wrap; padding: 14px; }
  .pbr-syllabus-topics a { flex-basis: 100%; }
}
.pbr-spa-auth { display:flex; align-items:center; gap:20px; margin-left:auto; white-space:nowrap; }
.pbr-spa-auth > a:first-child { color:#e7eef9; text-decoration:none; font-weight:600; }
.pbr-spa-auth .btn { padding:10px 18px; min-height:40px; }
.pbr-spa-tools { position:relative; display:flex; align-items:center; }
.pbr-spa-tools > button { border:0; background:transparent; color:inherit; font:inherit; font-size:11px; font-weight:600; padding:12px 0; cursor:pointer; }
.pbr-spa-tools > nav { position:absolute; top:100%; left:0; min-width:220px; padding:8px; background:var(--ui-surface,#fff); color:var(--ui-text,#18283f); border:1px solid var(--ui-border,#dce4ee); border-radius:12px; box-shadow:0 12px 32px #13233b24; }
.pbr-spa-tools > nav a { display:block; padding:10px 12px; border-radius:7px; color:inherit; text-decoration:none; }
.pbr-spa-tools > nav a:hover { background:var(--ui-surface-muted,#edf3fb); }
.pbr-spa-account { margin-left:auto; }
.pbr-spa-search { margin-left:auto; display:grid; place-items:center; width:40px; height:40px; border:1px solid #ffffff38; border-radius:50%; background:transparent; color:#fff; cursor:pointer; }
.pbr-spa-search + .pbr-spa-account { margin-left:0; }
.pbr-spa-account > button { display:flex; align-items:center; gap:10px; }
.pbr-spa-avatar { display:grid; place-items:center; width:32px; height:32px; border-radius:50%; background:#3e597b; color:#fff; font-size:12px; font-weight:700; }
.pbr-spa-account-name { max-width:180px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
@media(max-width:860px) { .pbr-spa-auth { gap:12px; } .pbr-spa-auth .btn { padding:8px 10px; font-size:12px; } .pbr-spa-account-name { display:none; } }
@media(max-width:440px) { .pbr-spa-brand{min-width:52px} .pbr-spa-header{gap:8px} .pbr-spa-auth > a:first-child { font-size:12px; } .pbr-spa-auth { gap:8px; } .pbr-spa-brand > span { display:none; } }