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body .tabbar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:680px;border:0;border-top:1px solid var(--line);border-radius:0;background:var(--ux-panel);padding:6px 12px calc(7px + env(safe-area-inset-bottom));min-height:65px;height:auto;box-shadow:0 -3px 14px #20365404;gap:0;z-index:30}body .tabbar[hidden]{display:none!important}body .tabbar-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;padding:0;min-width:0;min-height:51px;font-size:12px;color:var(--muted);background:none;border:0}body .tabbar-icon{display:grid;place-items:center;width:45px;height:29px;border-radius:10px;background:none;color:var(--muted);box-shadow:none;border:0}body .tabbar-icon>.icon{height:24px;width:24px}body .tabbar-item.is-active{color:var(--blue)}body .tabbar-item.is-active .tabbar-icon{background:var(--ux-soft);color:var(--blue);box-shadow:none;border:0}body .tabbar-item::before,body .tabbar-item::after{display:none}
body.in-practice .app-main{padding:3px 17px calc(96px + env(safe-area-inset-bottom))}body.in-practice .practice-view{padding:0;max-width:none}body.in-practice .practice-top{align-items:center;gap:10px;margin:4px 3px 12px}body.in-practice .practice-top-copy{min-width:0;flex:1}body.in-practice .practice-mode-badge{font-size:13px;min-height:28px;padding:3px 7px;background:var(--ux-soft);color:var(--blue);border-radius:6px;display:inline-flex}.practice-top-copy h1{display:none}.practice-top-copy>p{font-size:13px;color:var(--muted);line-height:1.55;margin-top:8px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.practice-top-right{flex-shrink:0;display:flex;flex-direction:column;gap:7px;align-items:end}body .practice-progress{display:flex;gap:5px;align-items:center;background:none;border:0;color:var(--ink);font-size:14px;min-height:38px;padding:0}.practice-progress strong{font-size:17px}.practice-progress>span{font-size:14px}.practice-progress .icon{width:18px;height:18px;margin-left:5px;color:var(--muted)}.practice-exam-countdown strong{font-size:16px}.practice-exam-countdown>span{display:none}body .practice-submit-exam-button{min-height:35px;padding:6px 10px;font-size:14px}.practice-view>.thin-progress{margin:0 3px 18px;height:4px}.question-paper{background:var(--ux-panel);border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow);padding:19px 17px}.question-meta{gap:10px;align-items:center;margin-bottom:15px}.question-meta>.type{background:var(--ux-soft);color:var(--blue);padding:4px 8px;border-radius:6px;font-size:13px}.question-meta>span:not(.type){display:none}.question-meta>.icon-button{margin-left:auto;border:0;background:transparent;width:36px;height:36px;min-height:36px;min-width:36px}.question-meta>.icon-button.is-active{color:var(--blue);background:var(--ux-soft)}body .question-stem{font-size:18px!important;line-height:1.85!important;font-weight:550;margin:0 0 16px;color:var(--ink);overflow-wrap:anywhere}.question-note{display:none}.question-tool-actions{display:flex;gap:8px;margin:0 0 17px;padding:0;border:0}.question-tool{display:flex;align-items:center;justify-content:center;gap:5px;flex:1;min-height:39px;font-size:13px;border:1px solid var(--line);background:var(--ux-bg);border-radius:9px;color:var(--muted)}.question-tool .icon{width:17px;height:17px}.question-tool.is-active{color:var(--blue);background:var(--ux-soft)}.options{gap:11px}.option-row{display:flex;align-items:center;gap:12px;min-height:62px;padding:13px 12px;border:1px solid var(--line);border-radius:11px;background:var(--ux-panel);box-shadow:none}.option-row p{font-size:16px;line-height:1.65;color:var(--ink);flex:1}.option-letter{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--ux-bg);font-size:14px;color:var(--muted);border:0;flex-shrink:0}.option-row.is-correct{background:#edf8f4;border-color:#79b8a7}.option-row.is-correct .option-letter{color:#fff;background:#19856b}.option-row.is-wrong{background:#fff3f2;border-color:#d99b9b}.option-row.is-wrong .option-letter{color:#fff;background:#c65959}.option-row.is-selected{background:var(--ux-soft);border-color:var(--blue)}.answer-explain{padding:16px;border-radius:12px;margin-top:18px;background:var(--ux-bg);font-size:15px;line-height:1.85;color:var(--ink);border:0}.answer-explain strong{font-size:15px}.question-audio{width:100%;max-width:100%;margin:10px 0}.question-inline-image{max-width:100%;height:auto;border-radius:9px}.recall-prompt{font-size:14px}.recall-answer{font-size:16px;line-height:1.8;padding:14px;background:var(--ux-bg);border-radius:12px}.recall-self-grade{display:flex;gap:10px;margin-top:14px}.question-note-editor textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px;background:var(--ux-bg);color:var(--ink);font-size:16px}.question-comment-row strong{font-size:14px}.question-comment-row p{font-size:15px}.question-comment-row small{font-size:12px}.comment-compose input{min-width:0;width:100%;border:1px solid var(--line);font-size:15px}body .practice-navigation{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:680px;background:var(--ux-panel);padding:12px 19px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line);box-shadow:none;z-index:25;display:flex;gap:12px;margin:0}.practice-navigation button{min-height:47px}.practice-navigation .secondary-button{flex:1}.practice-navigation .primary-button{flex:2}.practice-footnote{display:none}body[data-font-size=small] .question-stem{font-size:16px!important}body[data-font-size=large] .question-stem{font-size:20px!important}body[data-font-size=max] .question-stem{font-size:23px!important}body[data-font-size=large] .option-row p{font-size:18px}body[data-font-size=max] .option-row p{font-size:20px}
.ux-backdrop,.practice-settings-backdrop,.answer-sheet-backdrop,.practice-dialog-backdrop{position:fixed;inset:0;background:#0c1c3655;backdrop-filter:none;z-index:80}.ux-sheet,.practice-settings-sheet,.answer-sheet-panel,.practice-dialog{position:fixed;bottom:0;top:auto;left:50%;transform:translateX(-50%);width:100%;max-width:680px;max-height:87dvh;overflow:auto;background:var(--ux-panel);border:1px solid var(--line);border-radius:22px 22px 0 0;padding:22px 22px calc(26px + env(safe-area-inset-bottom));z-index:81;box-shadow:0 -10px 40px #0001}.ux-sheet-head,.practice-settings-heading,.practice-dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:18px}.ux-sheet h2,.practice-settings-heading h2{font-size:18px}.ux-role-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}.ux-role-grid button,.ux-count-options button{min-height:47px;border:1px solid var(--line);background:var(--ux-bg);color:var(--ink);border-radius:9px;font-size:15px}.ux-role-grid .is-active,.ux-count-options .is-active{background:var(--ux-soft);border-color:var(--blue);color:var(--blue)}.ux-field{display:grid;gap:8px;font-size:14px;margin:0 0 17px;color:var(--muted)}.ux-field select{width:100%;height:48px;padding:0 12px;border:1px solid var(--line);border-radius:10px;color:var(--ink);background:var(--ux-bg);font-size:16px;min-width:0}.ux-count-options{display:flex;gap:7px}.ux-count-options button{flex:1;padding:6px 4px}.ux-full{width:100%;display:flex;justify-content:center}.ux-exam-spec{display:flex;justify-content:space-between;padding:14px;background:var(--ux-bg);border-radius:10px;margin-bottom:19px;color:var(--muted);font-size:15px}.ux-download-row{display:flex;align-items:center;gap:10px;padding:14px 0;border-bottom:1px solid var(--line)}.ux-download-row>div{flex:1;min-width:0}.ux-download-row strong{font-size:15px}.ux-download-row small{display:block;font-size:13px;color:var(--muted);margin-top:5px}.ux-note-row{width:100%;padding:15px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink)}.ux-note-row strong{font-size:15px}.ux-note-row p{font-size:14px;color:var(--muted)}.ux-loading{position:fixed;inset:auto 0 100px;margin:auto;display:flex;align-items:center;justify-content:center;gap:10px;border:1px solid var(--line);border-radius:12px;background:var(--ux-panel);box-shadow:0 4px 20px #1c345b22;max-width:230px;padding:15px;z-index:70;font-size:14px}.ux-spinner{height:18px;width:18px;border:2px solid var(--line);border-top-color:var(--blue);border-radius:50%;animation:ux-spin .7s linear infinite}@keyframes ux-spin{to{transform:rotate(360deg)}}.practice-mode-choice{padding:12px;min-height:44px;font-size:15px}.practice-mode-choice small{display:none}.practice-answer-sheet-setting .settings-copy>span{display:none}.answer-sheet-stat strong{font-size:22px}.answer-sheet-stat span{font-size:13px}.answer-sheet-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:9px}.answer-sheet-item{min-height:55px;border-radius:9px;background:var(--ux-bg);font-size:15px}.answer-sheet-item small{font-size:12px}.answer-sheet-item.is-current{border-color:var(--blue)}.answer-sheet-item.is-correct{background:#e8f6f1}.answer-sheet-item.is-wrong{background:#fff0ee}.toast{font-size:14px;bottom:95px;z-index:100}.ux-modal-open{overflow:hidden}
body.night-mode .ux-continue,body.night-mode .ux-role-card{background:linear-gradient(115deg,#213f70,#2a5995)}body.night-mode .glass-card,body.night-mode .question-paper,body.night-mode .catalog-chapter,body.night-mode .catalog-knowledge-group,body.night-mode .bank-version-card,body.night-mode .question-row,body.night-mode .leaderboard-empty,body.night-mode .data-empty,body.night-mode .empty-state,body.night-mode .settings-card,body.night-mode .login-card,body.night-mode .profile-edit-panel{background:var(--ux-panel);border-color:var(--line);color:var(--ink)}body.night-mode .subject-card{background:var(--ux-panel);border-color:var(--line)}body.night-mode .search-bar{background:var(--ux-panel)}body.night-mode .subject-card strong,body.night-mode .question-copy strong,body.night-mode .chapter-copy strong,body.night-mode .knowledge-copy strong,body.night-mode .settings-copy strong,body.night-mode .brand-mark{color:var(--ink)}body.night-mode .catalog-overview,body.night-mode .leaderboard-me,body.night-mode .learning-hero{background:var(--ux-soft);border-color:var(--line)}body.night-mode .option-row{background:var(--ux-panel);border-color:var(--line)}body.night-mode .option-row.is-correct{background:#18392f;border-color:#498e79}body.night-mode .option-row.is-wrong{background:#40272e;border-color:#a16e77}body.night-mode .option-row.is-selected{background:var(--ux-soft);border-color:var(--blue)}body.night-mode .option-row p{color:var(--ink)}body.night-mode .answer-explain{background:var(--ux-bg);color:var(--ink)}body.night-mode .primary-button{background:#2869d1;color:white}body.night-mode .ux-continue .primary-button{background:#fff;color:#2054a1}body.night-mode .secondary-button{background:var(--ux-panel);color:var(--ink);border-color:var(--line)}body.night-mode .practice-settings-sheet,body.night-mode .answer-sheet-panel,body.night-mode .practice-dialog{background:var(--ux-panel);border-color:var(--line)}body.night-mode .answer-sheet-item.is-correct{background:#18392f}body.night-mode .answer-sheet-item.is-wrong{background:#40272e}
@media(min-width:761px){body .app-shell{margin:20px auto;min-height:calc(100dvh - 40px);border:1px solid var(--line);border-radius:19px}body .app-main{padding-left:28px;padding-right:28px}body .app-header{padding-left:28px;padding-right:28px}body .tabbar,body .practice-navigation{bottom:20px;max-width:678px;border-radius:0 0 18px 18px}.ux-sheet,.practice-settings-sheet,.answer-sheet-panel,.practice-dialog{max-width:520px;bottom:50%;transform:translate(-50%,50%);border-radius:20px}.ux-shortcuts{gap:13px}.ux-continue{padding:25px}.ux-continue h2{font-size:22px}}
@media(max-width:350px){body .app-header{padding-left:16px;padding-right:16px}body .app-main{padding-left:16px;padding-right:16px}.ux-shortcuts{gap:6px}.ux-shortcuts button{font-size:13px}.ux-continue{padding:18px}.ux-sheet{padding-left:18px;padding-right:18px}.subject-card small{font-size:13px!important}.catalog-filter-row{gap:5px}.catalog-filter-row .compact-button{font-size:13px;padding:7px 9px}body .question-stem{font-size:17px!important}.option-row{padding:12px 10px;gap:9px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

body .app-main{animation:none;opacity:1}body .app-shell{animation:none}

body .option-row p{font-size:16px!important;line-height:1.7!important}body[data-font-size=small] .option-row p{font-size:14px!important}body[data-font-size=large] .option-row p{font-size:18px!important}body[data-font-size=max] .option-row p{font-size:20px!important}.ux-answer-correct{display:flex;align-items:center;gap:8px;color:#168369;margin-top:16px;font-size:15px}.ux-answer-correct>.text-button{margin-left:auto}.ux-answer-correct>.icon{width:19px;height:19px}
.ux-sheet,.practice-settings-sheet,.answer-sheet-panel,.practice-dialog{animation:none!important}.ux-backdrop,.practice-settings-backdrop,.answer-sheet-backdrop,.practice-dialog-backdrop{animation:none!important}
body .catalog-overview{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px 14px;padding:17px}.catalog-overview .catalog-overline{grid-column:1;margin:0}.catalog-overview .catalog-overview-line{grid-column:1;display:flex;flex-wrap:wrap;gap:5px 10px;margin:0}.catalog-overview .catalog-overview-line strong{font-size:23px;line-height:1.3}.catalog-overview .catalog-overview-line>span{font-size:13px}.catalog-overview>.thin-progress{grid-column:1/-1;grid-row:3;margin:0}.catalog-overview>.primary-button{grid-column:2;grid-row:1/3;align-self:center;font-size:14px;padding:10px 12px;min-height:44px;margin:0}.catalog-filter-row{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}.catalog-filter-row button{flex-shrink:0}.section{margin-top:23px}.catalog-mode-grid{margin-top:17px}.catalog-list>.catalog-chapter{margin-bottom:0}
body.night-mode .app-shell,body.night-mode .app-header{background:var(--ux-bg)}body.night-mode .tabbar,body.night-mode .practice-navigation{background:var(--ux-panel);border-color:var(--line)}body.night-mode .tabbar-item{color:var(--muted)}body.night-mode .tabbar-icon{background:none;color:var(--muted)}body.night-mode .tabbar-item.is-active{color:var(--blue)}body.night-mode .tabbar-item.is-active .tabbar-icon{background:var(--ux-soft);color:var(--blue);border:0;box-shadow:none}body.night-mode .tabbar-item.is-active::before,body.night-mode .tabbar-item.is-active::after{display:none}body.night-mode .catalog-mode-card{background:none;border:0}body.night-mode .catalog-mode-card.is-active{background:var(--ux-panel)}body.night-mode .catalog-mode-card strong{color:var(--ink)}body.night-mode .catalog-mode-card.is-active strong{color:var(--blue)}body.night-mode .catalog-mode-grid{background:var(--line)}body.night-mode .catalog-overline{color:var(--muted)}body.night-mode .option-letter{color:var(--muted);background:var(--ux-bg)}body.night-mode .option-row.is-correct .option-letter{color:#fff;background:#19856b}body.night-mode .option-row.is-wrong .option-letter{color:#fff;background:#c65959}body.night-mode .chapter-number{background:var(--ux-bg);color:var(--muted)}body.night-mode .question-tool{background:var(--ux-bg);border-color:var(--line);color:var(--muted)}body.night-mode .question-tool.is-active{background:var(--ux-soft);color:var(--blue)}body.night-mode .icon-button{background:var(--ux-panel);border-color:var(--line);color:var(--ink)}body.night-mode .thin-progress{background:var(--line)}body.night-mode .thin-progress i{background:var(--blue)}

/* Practice wrap-up keeps the existing session available for review. */
.ux-summary-stats{display:grid;grid-template-columns:repeat(3,1fr);padding:22px 0;margin:4px 0 20px;background:var(--ux-bg);border-radius:14px;text-align:center}.ux-summary-stats strong{display:block;font-size:26px;color:var(--ink);font-variant-numeric:tabular-nums}.ux-summary-stats span{display:block;font-size:14px;color:var(--muted);margin-top:7px}.ux-summary-stats>div+div{border-left:1px solid var(--line)}.ux-summary-actions{display:grid;gap:10px}.ux-summary-actions .ux-full{align-items:center}
body.night-mode .tabbar .tabbar-item.is-active .tabbar-icon,body.night-mode .tabbar .tabbar-item[aria-current="page"] .tabbar-icon{background:var(--ux-soft);color:var(--blue)}body.night-mode .tabbar .tabbar-item.is-active .tabbar-icon .icon{color:var(--blue)}
.catalog-chapter>summary>.icon{transition:transform .18s}.catalog-chapter[open]>summary>.icon{transform:rotate(90deg)}

@media(max-width:760px){body .app-header{padding-top:calc(16px + env(safe-area-inset-top))}}

/* Keep membership details and bank metadata legible in narrow WebViews. */
body .ux-profile-card::before,
body .ux-profile-card::after,
body .ux-membership::before,
body .ux-membership::after { content: none !important; display: none !important; }
body .ux-membership {
  box-sizing: border-box;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px 10px;
  min-height: 56px;
  padding: 12px 18px;
  line-height: 1.45;
}
body .ux-membership > .icon { grid-column: 1; width: 19px; height: 19px; }
body .ux-membership > span { grid-column: 2; min-width: 0; overflow-wrap: anywhere; }
body .ux-membership > strong {
  grid-column: 3;
  min-width: 0;
  max-width: 100%;
  text-align: right;
  white-space: normal;
  overflow-wrap: anywhere;
  line-height: 1.4;
  font-size: 13px;
}
body .ux-membership > strong:empty { display: none; }
body .subject-card {
  grid-template-columns: 44px minmax(0, 1fr) 18px;
  grid-template-rows: auto auto;
  min-width: 0;
}
body .subject-card > .subject-symbol { grid-column: 1; grid-row: 1 / span 2; }
body .subject-card > strong {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  align-self: end;
  overflow-wrap: anywhere;
}
body .subject-card > small {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  margin: 0;
  text-align: left;
  line-height: 1.45;
  white-space: normal;
  overflow: visible;
  text-overflow: clip;
  overflow-wrap: anywhere;
}
body .subject-card > .category-entry { grid-column: 3; grid-row: 1 / span 2; }
body .bank-version-card { display: flex; gap: 12px; min-width: 0; }
body .bank-version-copy { min-width: 0; flex: 1 1 auto; }
body .bank-version-copy > strong,
body .bank-version-copy > small {
  white-space: normal;
  overflow: visible;
  text-overflow: clip;
  overflow-wrap: anywhere;
  line-height: 1.45;
}
body .bank-version-card > .icon,
body .bank-version-card > .bank-access-badge { flex: 0 0 auto; }
@media(max-width:380px) {
  body .ux-membership { grid-template-columns: 20px minmax(0, 1fr); }
  body .ux-membership > .icon { grid-row: 1 / span 2; }
  body .ux-membership > span { grid-column: 2; grid-row: 1; }
  body .ux-membership > strong:not(:empty) {
    grid-column: 2;
    grid-row: 2;
    justify-self: start;
    text-align: left;
  }
}

/* Keep the three question tools visually separated from the question surface. */
body.in-practice .question-tool-actions,
body.night-mode.in-practice .question-tool-actions{background:transparent;border:0;border-radius:0;box-shadow:none;padding:0}

.ux-download-copy{display:grid;gap:5px;margin:4px 0 18px;min-width:0}
.ux-download-copy strong{font-size:16px;color:var(--ink);overflow-wrap:anywhere}
.ux-download-copy small,.ux-download-stats,.ux-download-exit-copy{font-size:14px;line-height:1.6;color:var(--muted)}
.ux-download-track{height:9px;overflow:hidden;border-radius:999px;background:var(--line);margin:14px 0 8px}
.ux-download-track i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#2c74df,#58b1ff);transition:width .18s ease}
.ux-download-track.is-indeterminate i{animation:ux-download-indeterminate 1.15s ease-in-out infinite alternate}
@keyframes ux-download-indeterminate{from{transform:translateX(-75%)}to{transform:translateX(190%)}}
.ux-download-stats{margin:0 0 18px;font-variant-numeric:tabular-nums}
.ux-download-exit-copy{margin:2px 0 16px}
.ux-download-exit-actions{display:grid;gap:9px}
body.night-mode .ux-download-track{background:#2b3e55}
body.night-mode .ux-download-track i{background:linear-gradient(90deg,#68a8ff,#8bd0ff)}
body.night-mode .ux-download-copy strong{color:var(--ink)}

/* Brand mark and knowledge practice stay in the blue-and-white identity. */
.brand-mark .brand-logo{width:34px;height:34px;object-fit:contain;flex:0 0 auto}
body .catalog-mode-grid{background:#eff4fb;border:1px solid #e0e8f3}
body .catalog-mode-card{color:var(--muted);border:1px solid transparent;background:transparent;box-shadow:none}
body .catalog-mode-card.is-active{color:#1957bf;background:#eaf1fd;border-color:#d8e5f8;box-shadow:none}
body .catalog-knowledge-group{background:var(--ux-panel);border-color:var(--line);box-shadow:var(--shadow)}
body .catalog-knowledge-head .chapter-number,body .catalog-chapter .chapter-number{color:#245eae;background:#eaf1fd;border:1px solid #dce8f9}
body .catalog-knowledge-list{border-color:var(--line)}
body .catalog-knowledge-list .knowledge-row{background:transparent;color:var(--ink-soft);border-top-color:var(--line)}
body .catalog-knowledge-list .knowledge-row:active{background:#f4f7fc}
body .knowledge-index{color:#245eae;background:#eaf1fd;border:1px solid #dce8f9}
body .chapter-practice-button{color:#1957bf;background:linear-gradient(135deg,#edf4ff,#f8faff);border-color:#d8e5f8}
body .chapter-practice-button small{color:#71839b}
body.night-mode .catalog-mode-grid{background:#14243a;border-color:var(--line)}
body.night-mode .catalog-mode-card{color:var(--muted);background:transparent}
body.night-mode .catalog-mode-card.is-active{color:#b9d5ff;background:#203a5d;border-color:#355783}
body.night-mode .catalog-knowledge-group{background:var(--ux-panel);border-color:var(--line)}
body.night-mode .catalog-knowledge-head .chapter-number,body.night-mode .catalog-chapter .chapter-number,body.night-mode .knowledge-index{color:#b8d4ff;background:#203a5d;border-color:#355783}
body.night-mode .catalog-knowledge-list .knowledge-row{background:transparent;color:var(--ink-soft);border-top-color:var(--line)}
body.night-mode .catalog-knowledge-list .knowledge-row:active{background:#1c2d46}
body.night-mode .chapter-practice-button{color:#c1dbff;background:linear-gradient(135deg,#1b3455,#203e64);border-color:#355783}
body.night-mode .chapter-practice-button small{color:#a9bdd7}