:root{
  --bg:#f6f8fb;
  --surface:#ffffff;
  --surface-2:#f1f5f9;
  --text:#182132;
  --muted:#667085;
  --line:#e3e8ef;
  --primary:#3f7cff;
  --primary-2:#35c2a5;
  --primary-soft:#eaf2ff;
  --green:#16a34a;
  --red:#ef4444;
  --yellow:#f59e0b;
  --shadow:0 16px 40px rgba(22,34,51,.08);
  --radius:18px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Helvetica Neue",Arial,sans-serif;
  background:linear-gradient(180deg,#eef5ff 0,#f6f8fb 320px);
  color:var(--text);
}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.app-shell{
  display:flex;
  min-height:100vh;
}
.side-nav{
  width:276px;
  padding:22px 18px;
  background:rgba(255,255,255,.84);
  border-right:1px solid rgba(226,232,240,.9);
  backdrop-filter:blur(16px);
  position:sticky;
  top:0;
  height:100vh;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:6px 6px 20px;
}
.brand-mark{
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  border-radius:14px;
  color:#fff;
  font-weight:800;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:0 10px 22px rgba(63,124,255,.28);
}
.brand-title{font-weight:800;font-size:17px}
.brand-subtitle{color:var(--muted);font-size:12px;margin-top:2px}
.nav-list{display:flex;flex-direction:column;gap:8px;margin-top:6px}
.nav-item{
  width:100%;
  text-align:left;
  border:0;
  background:transparent;
  color:#344054;
  padding:13px 14px;
  border-radius:14px;
  font-weight:700;
}
.nav-item:hover{background:#f3f7fb}
.nav-item.active{
  color:#0f4ad0;
  background:var(--primary-soft);
  box-shadow:inset 0 0 0 1px #d6e5ff;
}
.side-card{
  margin-top:22px;
  background:linear-gradient(135deg,#0f4ad0,#35c2a5);
  color:#fff;
  border-radius:20px;
  padding:18px;
  box-shadow:var(--shadow);
}
.side-card-label{font-size:12px;opacity:.86}
.side-card-number{font-size:34px;font-weight:900;line-height:1.15;margin-top:2px}
.side-card-small{font-size:12px;opacity:.9}
.today-lines{display:grid;gap:8px;margin-top:12px}
.today-lines div{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid rgba(255,255,255,.24);padding-top:8px}
.today-lines span{font-size:12px;opacity:.92}
.today-lines strong{font-size:18px}
.sound-toggle{
  margin:16px 8px;
  color:var(--muted);
  font-size:13px;
}
.sound-toggle input{vertical-align:-2px}
.main{
  flex:1;
  min-width:0;
  display:flex;
  flex-direction:column;
}
.topbar{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 28px;
  position:sticky;
  top:0;
  z-index:5;
  background:rgba(246,248,251,.8);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(226,232,240,.72);
}
.topbar-title{font-weight:800;font-size:18px}
.topbar-actions{display:flex;gap:8px;align-items:center}
.mobile-menu{display:none}
.ghost-btn{
  border:1px solid var(--line);
  background:#fff;
  color:#344054;
  padding:9px 12px;
  border-radius:999px;
  box-shadow:0 4px 14px rgba(22,34,51,.04);
  font-weight:700;
  font-size:13px;
}
.import-label input{display:none}
.view{
  display:none;
  padding:28px;
  width:min(1180px,100%);
}
.view.active{display:block}
.hero{
  background:linear-gradient(135deg,#ffffff 0,#eff7ff 56%,#eefcf7 100%);
  border:1px solid rgba(214,226,241,.9);
  border-radius:28px;
  padding:30px;
  box-shadow:var(--shadow);
  overflow:hidden;
  position:relative;
}
.hero::after{
  content:"";
  position:absolute;
  width:260px;
  height:260px;
  border-radius:50%;
  background:rgba(63,124,255,.08);
  right:-80px;
  top:-90px;
}
.hero-kicker{
  color:var(--primary);
  font-weight:800;
  font-size:13px;
  letter-spacing:.08em;
}
.hero h1{
  margin:8px 0 8px;
  font-size:34px;
  line-height:1.22;
  letter-spacing:-.02em;
}
.hero p{
  max-width:760px;
  margin:0;
  color:#475467;
  line-height:1.8;
}
.hero-actions{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap}
.primary-btn,.secondary-btn,.mini-btn,.danger-btn{
  border:0;
  border-radius:999px;
  font-weight:800;
}
.primary-btn{
  background:linear-gradient(135deg,var(--primary),#6ea8ff);
  color:#fff;
  padding:12px 18px;
  box-shadow:0 10px 22px rgba(63,124,255,.24);
}
.secondary-btn{
  background:#fff;
  color:#1856cf;
  padding:12px 18px;
  border:1px solid #d9e7ff;
}
.mini-btn{
  background:#eef4ff;
  color:#1856cf;
  padding:8px 12px;
  border:1px solid #d8e7ff;
}
.danger-btn{
  background:#fff1f2;
  color:#be123c;
  padding:8px 12px;
  border:1px solid #fecdd3;
}
.grid{
  display:grid;
  gap:16px;
}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:0 10px 26px rgba(22,34,51,.05);
}
.card h2,.card h3{margin:0 0 12px}
.card p{color:#475467;line-height:1.75;margin:8px 0}
.section-title{
  margin:28px 0 14px;
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap:16px;
}
.section-title h2{margin:0;font-size:22px}
.section-title p{margin:4px 0 0;color:var(--muted)}
.stat{
  padding:18px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:0 8px 22px rgba(22,34,51,.04);
}
.stat-label{color:var(--muted);font-size:12px;font-weight:700}
.stat-number{font-size:28px;font-weight:900;margin-top:4px}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  border-radius:999px;
  font-size:12px;
  font-weight:800;
  background:#eef4ff;
  color:#1856cf;
}
.badge.green{background:#eafaf2;color:#0f7a3d}
.badge.red{background:#fff1f2;color:#be123c}
.badge.yellow{background:#fff7ed;color:#c2410c}
.tabs{
  display:flex;
  gap:8px;
  margin:18px 0;
  flex-wrap:wrap;
}
.tab{
  border:1px solid var(--line);
  background:#fff;
  color:#344054;
  padding:10px 14px;
  border-radius:999px;
  font-weight:800;
}
.tab.active{background:#1f6fff;color:#fff;border-color:#1f6fff}
.toolbar{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
  margin:14px 0;
}
.input,.select{
  border:1px solid var(--line);
  background:#fff;
  border-radius:14px;
  padding:11px 12px;
  min-height:42px;
}
.input{min-width:260px}
.select{min-width:180px}
.quiz-card{
  background:#fff;
  border:1px solid #dce8ff;
  border-radius:26px;
  padding:24px;
  box-shadow:0 18px 42px rgba(31,111,255,.08);
}
.quiz-prompt{
  margin:10px 0 18px;
  font-size:28px;
  font-weight:900;
  letter-spacing:-.01em;
}
.quiz-meta{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
.choice-grid{
  display:grid;
  gap:10px;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.choice-btn{
  text-align:left;
  border:1px solid var(--line);
  background:#fff;
  padding:16px;
  border-radius:16px;
  font-weight:800;
  color:#344054;
}
.choice-btn:hover{border-color:#8eb9ff;background:#f7fbff}
.choice-btn.correct{background:#ecfdf3;border-color:#86efac;color:#166534}
.choice-btn.wrong{background:#fff1f2;border-color:#fda4af;color:#be123c}
.feedback{
  margin-top:16px;
  padding:16px;
  border-radius:16px;
  background:#f8fafc;
  border:1px solid var(--line);
}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:12px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{
  background:#f8fafc;
  text-align:left;
  font-size:12px;
  color:#475467;
  letter-spacing:.02em;
}
tbody tr:hover{background:#fbfdff}
.progress-pill{
  display:inline-flex;
  padding:4px 8px;
  border-radius:999px;
  background:#f1f5f9;
  color:#475467;
  font-size:12px;
  font-weight:800;
}
.reading-list{
  display:grid;
  gap:12px;
}
.reading-item{
  border:1px solid var(--line);
  border-radius:18px;
  background:#fff;
  padding:18px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  align-items:center;
  box-shadow:0 8px 22px rgba(22,34,51,.04);
}
.reading-title{font-weight:900;font-size:18px}
.reading-ja{color:#475467;margin-top:3px}
.passage{
  white-space:pre-line;
  line-height:1.9;
  font-size:16px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  padding:20px;
}
.question-block{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  padding:18px;
  margin:12px 0;
}
.question-block legend{font-weight:900;margin-bottom:8px}
.option-row{
  display:block;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:12px;
  margin:8px 0;
}
.option-row input{margin-right:8px}
.answer-box{
  margin-top:16px;
  background:#f8fafc;
  border:1px solid var(--line);
  border-radius:18px;
  padding:18px;
}
.vocab-chip{
  display:inline-flex;
  margin:4px;
  padding:7px 10px;
  border-radius:999px;
  background:#eef4ff;
  color:#1856cf;
  font-weight:800;
  font-size:13px;
}
.footer{
  color:#667085;
  font-size:12px;
  padding:24px 28px 34px;
  margin-top:auto;
  display:flex;
  justify-content:space-between;
  gap:16px;
  border-top:1px solid rgba(226,232,240,.7);
}
.notice{
  background:#fff8e6;
  border:1px solid #fde68a;
  color:#7c4a03;
  padding:14px 16px;
  border-radius:16px;
  line-height:1.7;
}
.empty{
  color:var(--muted);
  background:#fff;
  border:1px dashed #cbd5e1;
  border-radius:18px;
  padding:22px;
}
@media(max-width:900px){
  .app-shell{display:block}
  .side-nav{
    position:fixed;
    z-index:20;
    height:100vh;
    transform:translateX(-105%);
    transition:.2s ease;
  }
  .side-nav.open{transform:translateX(0)}
  .mobile-menu{display:inline-flex;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;font-weight:800}
  .topbar{padding:0 16px}
  .topbar-actions{display:none}
  .view{padding:18px}
  .grid-2,.grid-3,.grid-4,.choice-grid{grid-template-columns:1fr}
  .hero{padding:22px}
  .hero h1{font-size:26px}
  .footer{display:block}
  .input,.select{width:100%;min-width:0}
  .reading-item{display:block}
}

/* v3 refinements */
.topbar{justify-content:flex-start}
.topbar-title{margin-left:4px}
.hero-actions .primary-btn + .primary-btn{background:linear-gradient(135deg,#2563eb,#60a5fa)}
.big-card{padding:24px}
.link-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.link-row a{display:inline-flex;align-items:center;padding:9px 12px;border-radius:999px;background:#eef4ff;color:#1856cf;font-weight:800;text-decoration:none;border:1px solid #d8e7ff}
.exam-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 10px 26px rgba(22,34,51,.05)}
.exam-card h3{margin:10px 0 8px}.exam-card p{color:#475467;line-height:1.7;margin:0}
.exam-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-weight:900;box-shadow:0 10px 22px rgba(63,124,255,.18)}
.compact-table table{font-size:13px}.compact-table th,.compact-table td{padding:10px}
.update-card h3{font-size:18px}
.quiz-toolbar,.list-toolbar{align-items:stretch}
.day-summary{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:10px 0 10px}
.day-summary h3{margin:0 0 6px}.day-summary p{margin:0;color:#475467;line-height:1.7}
.mini-progress{min-width:150px;display:grid;grid-template-columns:1fr auto;gap:4px 10px;align-items:center;background:#f8fafc;border:1px solid var(--line);border-radius:16px;padding:12px;color:#667085;font-size:12px;font-weight:800}
.mini-progress strong{font-size:20px;color:#182132;text-align:right}
.meter{width:100%;height:12px;background:#e9eef6;border-radius:999px;overflow:hidden;margin:12px 0 16px}
.meter span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-2));border-radius:999px;transition:width .2s ease}.meter.small{height:8px;margin:10px 0}
.unknown-btn{margin-top:12px;border:1px solid #fde68a;background:#fffbeb;color:#92400e;padding:10px 14px;border-radius:999px;font-weight:900}.unknown-btn:disabled{opacity:.55;cursor:not-allowed}
.congrats-card{text-align:center}.congrats-card h2{margin:8px 0 8px}.congrats-emoji{font-size:48px}
.day-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.day-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 8px 22px rgba(22,34,51,.04)}
.day-card-head{display:flex;justify-content:space-between;align-items:center;gap:10px}.day-card-head strong{font-size:18px}.day-card-head span{color:#667085;font-weight:800;font-size:12px}.day-card p{margin:6px 0;color:#475467;font-size:13px;line-height:1.55}
.section-title.slim{margin-top:12px}
@media(max-width:900px){.day-summary{display:block}.mini-progress{margin-top:12px;width:100%}.day-grid{grid-template-columns:1fr}.link-row a{width:100%;justify-content:center}}

/* v4 additions */
.choice-list{display:grid;gap:10px;margin-top:12px}
.choice-list .option-row{cursor:pointer;background:#fff}
.choice-list .option-row.correct{background:#ecfdf3;border-color:#86efac;color:#166534}
.choice-list .option-row.wrong{background:#fff1f2;border-color:#fda4af;color:#be123c}
.reading-tabs,.grammar-crumbs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}
.reading-tab{border:1px solid var(--line);background:#fff;color:#344054;padding:10px 14px;border-radius:999px;font-weight:900}
.reading-tab.active{background:#1f6fff;color:#fff;border-color:#1f6fff}
.reading-subtitle{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:18px}
.category-card{border:1px solid var(--line);background:#fff;border-radius:20px;padding:18px;text-align:left;box-shadow:0 8px 22px rgba(22,34,51,.04)}
.category-card h3{margin:0 0 8px}.category-card p{margin:0;color:#475467;line-height:1.6}.category-card .category-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.problem-list{display:grid;gap:12px;margin-top:16px}
.problem-item{border:1px solid var(--line);border-radius:18px;background:#fff;padding:18px;text-align:left;display:flex;justify-content:space-between;gap:14px;align-items:center;box-shadow:0 8px 22px rgba(22,34,51,.04)}
.problem-title{font-weight:900;font-size:17px}.problem-meta{color:#475467;margin-top:3px;font-size:13px}
.grammar-sentence{font-size:22px;line-height:1.8;font-weight:800;margin:10px 0 14px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}
.translation-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;line-height:1.8;margin-top:12px;white-space:pre-line}
.answer-table{width:100%;border-collapse:collapse;margin-top:10px}.answer-table th,.answer-table td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}
.blank-label{font-weight:900;color:#0f4ad0}.question-block p{line-height:1.75}.source-note{font-size:12px;color:#667085;line-height:1.7;margin-top:8px}
@media(max-width:900px){.category-grid{grid-template-columns:1fr}.problem-item{display:block}.today-lines strong{font-size:16px}}

/* v5 refinements */
.quiz-start{display:grid;gap:16px}
.mode-card{display:flex;align-items:center;justify-content:space-between;gap:18px}
.mode-card h3{margin:0 0 6px}
.mode-card p{margin:0;color:#475467;line-height:1.65}
.mode-select-label{display:grid;gap:6px;font-size:12px;font-weight:900;color:#475467;min-width:220px}
.compact-days{margin-top:4px}
.primary-btn.full{width:100%;margin-top:10px;justify-content:center}
.quiz-session-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:0 0 10px}
.session-progress{display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:#475467;font-size:13px;font-weight:800;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 12px}
.session-meter{margin-bottom:18px}
.construction-card{text-align:center;max-width:760px;margin:18px auto 0}
.construction-icon{font-size:44px;margin-bottom:8px}
.site-footer{margin-top:auto;padding:26px 28px 34px;color:#a6adba;background:linear-gradient(135deg,#4a250f,#2f170b);border-top:1px solid rgba(0,0,0,.08)}
.footer-inner{width:min(1180px,100%);margin:0 auto}
.footer-links{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;justify-content:center;margin-bottom:16px}
.footer-links a{color:#f4e7dc;text-decoration:none;font-weight:700;font-size:13px;opacity:.88}
.footer-links a:hover{text-decoration:underline;opacity:1}
.footer-copy{text-align:center;font-size:13px;color:#f4e7dc;opacity:.86}
@media(max-width:900px){.mode-card,.quiz-session-head{display:block}.mode-select-label{min-width:0;margin-top:14px}.session-progress{border-radius:16px;margin-top:12px}.site-footer{padding:22px 18px 28px}.footer-links{display:grid;grid-template-columns:1fr 1fr;text-align:center;gap:12px}.footer-copy{font-size:12px}}
.side-nav{overflow-y:auto}

/* v6 refinements */
.side-nav{
  transition: width .22s ease, padding .22s ease, transform .2s ease, border-color .22s ease;
  flex:0 0 276px;
}
.sidebar-collapsed .side-nav{
  width:0;
  flex-basis:0;
  padding-left:0;
  padding-right:0;
  border-right-color:transparent;
  overflow:hidden;
}
.sidebar-collapsed .side-nav > *{
  opacity:0;
  pointer-events:none;
}
.edge-sidebar-toggle{
  position:fixed;
  left:260px;
  top:84px;
  z-index:30;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border:1px solid var(--line);
  background:#fff;
  color:#1856cf;
  border-radius:999px;
  font-weight:900;
  box-shadow:0 6px 18px rgba(22,34,51,.06);
}
.edge-sidebar-toggle:hover{background:#eef4ff;border-color:#c7dcff}
.sidebar-collapsed .edge-sidebar-toggle{left:10px}
.quiz-only-view{width:min(860px,100%);margin:0 auto;padding-top:18px}
.quiz-only-view .quiz-card{margin-top:14px}
.sound-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 9px;
  border-radius:999px;
  background:#f7fbff;
  border:1px solid #d8e7ff;
  color:#1856cf;
  font-size:12px;
  font-weight:900;
}
.sound-chip input{vertical-align:-2px}
.site-footer{
  margin-top:auto;
  padding:22px 28px 28px;
  background:transparent;
  border-top:0;
  color:#7b93bd;
}
.footer-copy{
  text-align:center;
  font-size:12px;
  color:#7b93bd;
  opacity:.9;
}
.about-card-list{grid-template-columns:1fr;max-width:920px}
.brand{padding-bottom:14px}

@media(max-width:900px){
  .side-nav{flex-basis:auto;width:276px}
  .sidebar-collapsed .side-nav{width:276px;padding:22px 18px;border-right:1px solid rgba(226,232,240,.9)}
  .sidebar-collapsed .side-nav > *{opacity:1;pointer-events:auto}
  .edge-sidebar-toggle{display:none}
  .quiz-only-view{padding-top:0}
  .site-footer{padding:18px 18px 24px}
}


/* v6 edge toggle final */
.edge-sidebar-toggle{
  position:fixed;
  left:252px;
  top:22px;
  z-index:60;
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  border:1px solid #d8e7ff;
  border-radius:999px;
  background:#fff;
  color:#1856cf;
  font-size:23px;
  font-weight:900;
  line-height:1;
  box-shadow:0 8px 22px rgba(22,34,51,.08);
}
.edge-sidebar-toggle:hover{background:#eef4ff;border-color:#c7dcff}
.sidebar-collapsed .edge-sidebar-toggle{left:12px}
.sidebar-collapsed .main{min-width:0}
@media(max-width:900px){.edge-sidebar-toggle{display:none}}

/* v7 refinements */
:root{
  --brand-gradient:linear-gradient(135deg,#1d4ed8 0%,#2f7cff 55%,#35c2a5 100%);
  --brand-deep:#0f3fa7;
}
.view{
  margin-left:auto;
  margin-right:auto;
}
.topbar{
  justify-content:center !important;
  background:var(--brand-gradient) !important;
  color:#fff;
  border-bottom:0 !important;
  box-shadow:0 10px 26px rgba(31,111,255,.14);
}
.topbar-title{
  margin-left:0 !important;
  color:#fff;
  font-weight:900;
}
.mobile-menu{
  position:absolute;
  left:16px;
  color:#fff;
  background:rgba(255,255,255,.14);
  border-color:rgba(255,255,255,.35);
}
.edge-sidebar-toggle{
  top:18px !important;
  left:254px !important;
  z-index:70;
  border-color:rgba(255,255,255,.65);
  box-shadow:0 8px 22px rgba(22,34,51,.12);
}
.sidebar-collapsed .edge-sidebar-toggle{
  left:18px !important;
}
.sidebar-collapsed .main{
  width:100%;
}
.site-footer{
  margin-top:auto !important;
  padding:24px 28px 30px !important;
  background:var(--brand-gradient) !important;
  border-top:0 !important;
  color:#fff !important;
  box-shadow:0 -10px 26px rgba(31,111,255,.08);
}
.site-footer .footer-copy,
.footer-copy{
  color:rgba(255,255,255,.88) !important;
  font-size:12px;
  text-align:center;
}
.about-card-list{
  margin-top:18px;
}
@media(max-width:900px){
  .topbar{justify-content:center !important;}
  .edge-sidebar-toggle{display:none !important;}
}

/* v9 illustration layout */
.hero-with-art{
  min-height:238px;
  display:flex;
  align-items:center;
  padding-right:280px;
}
.hero-body{
  position:relative;
  z-index:2;
  max-width:760px;
}
.hero-art-img{
  position:absolute;
  right:34px;
  bottom:0;
  max-width:245px;
  max-height:225px;
  object-fit:contain;
  z-index:1;
  filter:drop-shadow(0 18px 24px rgba(31,111,255,.12));
}
.feature-grid{align-items:stretch}
.feature-card{
  border:1px solid var(--line);
  background:#fff;
  border-radius:22px;
  padding:18px;
  display:flex;
  align-items:center;
  gap:16px;
  text-align:left;
  box-shadow:0 10px 26px rgba(22,34,51,.05);
  transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.feature-card:hover{
  transform:translateY(-2px);
  border-color:#b9d3ff;
  box-shadow:0 16px 36px rgba(31,111,255,.12);
}
.feature-card img{
  width:86px;
  height:86px;
  object-fit:contain;
  flex:0 0 auto;
}
.feature-card h3{margin:0 0 4px;font-size:18px}
.feature-card p{margin:0;color:#475467;line-height:1.55}
.card-with-art{
  display:grid;
  grid-template-columns:minmax(0,1fr) 132px;
  gap:16px;
  align-items:center;
}
.card-art-img{
  width:132px;
  max-height:150px;
  object-fit:contain;
  justify-self:end;
  filter:drop-shadow(0 12px 18px rgba(31,111,255,.10));
}
.overview-card-grid{align-items:stretch}
@media(max-width:900px){
  .hero-with-art{padding-right:22px;padding-bottom:132px;min-height:300px;align-items:flex-start}
  .hero-art-img{right:16px;bottom:8px;max-width:165px;max-height:145px;opacity:.92}
  .feature-card{align-items:flex-start}
  .feature-card img{width:70px;height:70px}
  .card-with-art{grid-template-columns:1fr}
  .card-art-img{width:110px;justify-self:start}
}

/* v11 SEO/static fallback and cleanup */
.noscript-seo{
  margin:24px auto;
  width:min(980px,calc(100% - 36px));
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  padding:24px;
  line-height:1.8;
  box-shadow:0 10px 26px rgba(22,34,51,.05);
}
.noscript-seo h1{margin:0 0 10px;font-size:30px}
.noscript-seo h2{margin:18px 0 8px;font-size:20px}
.noscript-seo ul{margin:8px 0 0;padding-left:22px}

/* v12 sticky top navigation */
body{
  background:linear-gradient(180deg,#eef5ff 0,#f6f8fb 300px);
}
.app-shell.top-layout{
  display:block;
  min-height:100vh;
}
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  min-height:78px;
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 28px;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid rgba(226,232,240,.92);
  backdrop-filter:blur(16px);
  box-shadow:0 8px 24px rgba(22,34,51,.05);
}
.logo-home{
  border:0;
  background:transparent;
  padding:0;
  display:flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  border-radius:14px;
}
.logo-home:focus-visible{
  outline:3px solid rgba(63,124,255,.28);
  outline-offset:4px;
}
.site-logo{
  display:block;
  width:205px;
  max-width:32vw;
  height:auto;
  max-height:60px;
  object-fit:contain;
}
.top-nav{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
  padding:4px 2px;
}
.top-nav::-webkit-scrollbar{display:none}
.top-nav .nav-item{
  width:auto;
  flex:0 0 auto;
  text-align:center;
  padding:9px 12px;
  border-radius:999px;
  font-size:13px;
  line-height:1;
  color:#344054;
  background:transparent;
  white-space:nowrap;
  border:1px solid transparent;
  box-shadow:none;
}
.top-nav .nav-item:hover{
  color:#1856cf;
  background:#f2f7ff;
  border-color:#dce9ff;
}
.top-nav .nav-item.active{
  color:#1856cf;
  background:#eaf2ff;
  border-color:#cfe0ff;
  box-shadow:none;
}
.main{
  width:100%;
  min-height:calc(100vh - 78px);
}
.top-layout .view{
  width:min(1180px,100%);
  margin-left:auto;
  margin-right:auto;
}
.topbar,.side-nav,.edge-sidebar-toggle,.mobile-menu{display:none !important;}
.site-footer{
  margin-top:auto !important;
  padding:24px 28px 30px !important;
  background:var(--brand-gradient) !important;
  border-top:0 !important;
  color:#fff !important;
  box-shadow:0 -10px 26px rgba(31,111,255,.08);
}
@media(max-width:900px){
  .site-header{
    min-height:70px;
    padding:8px 14px;
    gap:10px;
  }
  .site-logo{
    width:148px;
    max-width:42vw;
    max-height:48px;
  }
  .top-nav .nav-item{
    font-size:12px;
    padding:8px 10px;
  }
  .top-layout .view{padding:18px;}
}


/* v13 TOEIC vocabulary controls */
.mode-controls{display:grid;gap:12px;align-items:start;min-width:230px}
.direction-radios{display:grid;gap:8px;margin-top:6px}
.direction-radios label{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:9px 10px;color:#344054;font-size:13px;font-weight:900}
.direction-radios input{margin:0}
@media(max-width:900px){.mode-controls{min-width:0;margin-top:14px}.direction-radios label{width:100%}}


/* v14 FAQ and legal pages */
.header-utility{
  display:flex;
  align-items:center;
  gap:4px;
  flex:0 0 auto;
  margin-left:auto;
}
.header-utility a{
  color:#667085;
  text-decoration:none;
  font-size:11px;
  font-weight:800;
  padding:6px 7px;
  border-radius:999px;
  white-space:nowrap;
  opacity:.82;
}
.header-utility a:hover{
  color:#1856cf;
  background:#f2f7ff;
  opacity:1;
}
.faq-layout{display:grid;gap:18px;margin-top:22px}
.faq-category h2{margin:0 0 14px;font-size:21px}
.faq-list{display:grid;gap:10px}
.faq-item{border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden}
.faq-item summary{cursor:pointer;padding:15px 16px;font-weight:900;line-height:1.55;list-style:none;position:relative;padding-right:42px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"＋";position:absolute;right:16px;top:50%;transform:translateY(-50%);color:#1856cf;font-weight:900}
.faq-item[open] summary::after{content:"−"}
.faq-item p{border-top:1px solid var(--line);margin:0;padding:15px 16px;color:#475467;line-height:1.8;background:#fbfdff;white-space:pre-line}
.info-link-grid{margin-top:0}
.info-link-card{display:block;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 10px 26px rgba(22,34,51,.05);transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}
.info-link-card:hover{transform:translateY(-2px);border-color:#b9d3ff;box-shadow:0 16px 36px rgba(31,111,255,.10)}
.info-link-card span{display:block;color:#2f7cff;font-size:11px;font-weight:900;letter-spacing:.08em;margin-bottom:7px}
.info-link-card strong{display:block;color:#182132;font-size:18px;margin-bottom:5px}
.info-link-card small{display:block;color:#667085;line-height:1.6}
.seo-header{display:flex;align-items:center;gap:18px;justify-content:space-between;position:sticky;top:0;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(226,232,240,.92);backdrop-filter:blur(16px);padding:10px 24px;z-index:10}
.seo-logo img{display:block;width:190px;max-width:40vw;height:auto;max-height:56px;object-fit:contain}
.seo-nav{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.seo-nav a{color:#667085;text-decoration:none;font-weight:800;font-size:12px;padding:7px 9px;border-radius:999px}
.seo-nav a:hover{background:#f2f7ff;color:#1856cf}
.seo-wrap{width:min(920px,calc(100% - 36px));margin:28px auto 64px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow);line-height:1.8}
.seo-wrap h1{font-size:30px;line-height:1.25;margin:0 0 14px}.seo-wrap h2{font-size:20px;margin:24px 0 8px}.seo-wrap p,.seo-wrap li{color:#475467}.seo-wrap ul{padding-left:22px}.seo-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.legal-note{background:#fbfdff;border:1px solid var(--line);border-radius:16px;padding:16px;margin:18px 0;color:#475467}
@media(max-width:1100px){.site-header{flex-wrap:wrap}.header-utility{width:100%;justify-content:flex-end;margin-left:0}.top-nav{flex:1 1 100%}}
@media(max-width:900px){.header-utility{justify-content:flex-start;overflow-x:auto;padding-bottom:2px}.grid-4.info-link-grid{grid-template-columns:1fr 1fr}.seo-header{display:block;padding:10px 16px}.seo-nav{justify-content:flex-start;margin-top:8px}.seo-wrap{padding:22px;margin-top:18px}}
@media(max-width:560px){.grid-4.info-link-grid{grid-template-columns:1fr}.header-utility a{font-size:10px;padding:5px 6px}.seo-logo img{width:150px;max-width:58vw}}

/* v15 overview article layout */
.overview-article{display:grid;gap:18px;margin-top:18px}
.overview-article-section{line-height:1.85}
.overview-article-section h2{margin:0 0 12px;font-size:24px;letter-spacing:-.02em}
.overview-article-section p{margin:0 0 12px;color:#344054}
.overview-article-section p:last-child{margin-bottom:0}
.overview-part-table{margin-top:8px}


/* v16 header/footer/legal refinements */
.site-logo{
  width:220px;
  max-width:34vw;
  max-height:76px;
  object-fit:contain;
}
.site-header{min-height:92px;}
.header-utility{display:none !important;}
.footer-notice{
  max-width:920px;
  margin:6px auto 0;
  text-align:center;
  color:rgba(255,255,255,.78);
  font-size:11px;
  line-height:1.7;
}
.footer-links a[data-view-link]{cursor:pointer;}
.legal-layout{display:grid;gap:16px;margin-top:18px;}
.legal-section{line-height:1.85;}
.legal-section h2{margin:0 0 8px;font-size:21px;}
.legal-section p{margin:0;color:#475467;white-space:pre-line;}
@media(max-width:900px){
  .site-header{min-height:76px;}
  .site-logo{width:158px;max-width:44vw;max-height:60px;}
  .footer-notice{font-size:10.5px;}
}

/* v16 final logo and footer polish */
.site-logo{
  width:220px !important;
  height:96px !important;
  max-width:34vw !important;
  max-height:none !important;
  object-fit:contain !important;
}
.seo-logo img{
  width:190px !important;
  height:83px !important;
  max-width:40vw !important;
  max-height:none !important;
  object-fit:contain !important;
}
@media(max-width:900px){
  .site-logo{width:158px !important;height:69px !important;max-width:44vw !important;}
  .seo-logo img{width:150px !important;height:65px !important;max-width:58vw !important;}
}

.analysis-summary-grid .stat{min-height:132px}
.analysis-stat-note{margin-top:8px;color:#667085;font-size:13px;line-height:1.6}
.chart-card{overflow:hidden}
.card-head-inline{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}
.card-head-inline h3{margin:0 0 6px}.card-head-inline p{margin:0;color:#667085;line-height:1.65}
.chart-scroll{overflow-x:auto;padding-bottom:4px}.chart-scroll svg{display:block;min-width:100%}
.chart-legend,.analysis-legend{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-bottom:12px;color:#475467;font-size:13px;font-weight:700}
.chart-legend span,.analysis-legend span{display:inline-flex;align-items:center;gap:8px}
.legend-blue,.legend-red,.legend-green,.legend-gray{display:inline-block;width:12px;height:12px;border-radius:999px}.legend-blue{background:#2563eb}.legend-red{background:#ef4444}.legend-green{background:#22c55e}.legend-gray{background:#cbd5e1}
.analysis-list{display:grid;gap:12px}.analysis-row-card,.metric-row{border:1px solid var(--line);border-radius:18px;padding:14px 15px;background:#fbfdff}.metric-row.compact{padding:12px 14px}
.analysis-row-head,.metric-row-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}.analysis-row-head strong{display:block;font-size:16px}.analysis-row-head span{display:block;color:#667085;font-size:12px;font-weight:700;margin-top:3px}.metric-row-head strong{font-size:15px}
.stacked-track{display:flex;width:100%;height:12px;border-radius:999px;overflow:hidden;background:#eef2f7;margin-bottom:10px}.stacked-track span{display:block;height:100%}.track-blue{background:#2563eb}.track-green{background:#22c55e}.track-gray{background:#cbd5e1}
.analysis-row-meta,.metric-row-meta{display:flex;gap:10px;flex-wrap:wrap;color:#667085;font-size:12px;font-weight:700}.metric-list{display:grid;gap:12px}.analysis-meter{height:10px;margin:0 0 10px}.meter-red{display:block;height:100%;background:#ef4444;border-radius:999px}
.insight-list{margin:0;padding-left:18px;display:grid;gap:10px}.insight-list li{color:#475467;line-height:1.7}.empty-note{margin:10px 0 0;color:#667085;line-height:1.7}
.heatmap-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;margin-top:4px}.heat-cell{display:inline-block;aspect-ratio:1/1;border-radius:8px;background:#eef2f7;border:1px solid rgba(148,163,184,.18)}.heat-cell.level-1{background:#dbeafe}.heat-cell.level-2{background:#93c5fd}.heat-cell.level-3{background:#60a5fa}.heat-cell.level-4{background:#1d4ed8}.heatmap-legend{display:flex;align-items:center;gap:8px;margin-top:12px;color:#667085;font-size:12px;font-weight:700;flex-wrap:wrap}.heatmap-legend .heat-cell{width:18px;height:18px}
@media(max-width:900px){.analysis-summary-grid,.analysis-top-grid,.analysis-mid-grid,.analysis-bottom-grid{grid-template-columns:1fr}.card-head-inline,.analysis-row-head,.metric-row-head{display:block}.analysis-row-head .mini-btn{margin-top:10px}.heatmap-grid{grid-template-columns:repeat(7,minmax(0,1fr))}}


/* v17 domain SEO static page enhancements */
.top-nav a.nav-item,.logo-home{text-decoration:none}
.seo-nav a.active{background:#eaf2ff;color:#1856cf;border:1px solid #cfe0ff}
.seo-breadcrumb{font-size:13px;color:#667085;margin-bottom:14px;font-weight:700}.seo-breadcrumb a{color:#1856cf;text-decoration:none}.seo-breadcrumb a:hover{text-decoration:underline}
.seo-wrap .lead{font-size:17px;color:#344054;line-height:1.9;margin:0 0 14px}.seo-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:16px 0 22px}.seo-link-card{display:block;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 8px 22px rgba(22,34,51,.04);transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.seo-link-card:hover{transform:translateY(-2px);border-color:#b9d3ff;box-shadow:0 16px 36px rgba(31,111,255,.10)}.seo-link-card span{display:block;color:#2f7cff;font-size:11px;font-weight:900;letter-spacing:.08em;margin-bottom:6px}.seo-link-card strong{display:block;color:#182132;font-size:17px;margin-bottom:5px}.seo-link-card small{display:block;color:#667085;line-height:1.55}.seo-table-wrap{margin:18px 0}.muted-line{color:#667085}.day-nav{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.day-nav.bottom{margin-top:20px}.question-list{display:grid;gap:16px;margin-top:18px}.question-block{border:1px solid var(--line);border-radius:18px;background:#fbfdff;padding:18px}.question-block h3{margin:0 0 10px}.question-block p{margin:8px 0}.sentence-en{font-weight:900;color:#182132 !important;background:#fff;border:1px solid #edf2f7;border-radius:14px;padding:12px}.choice-mini-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 18px;margin:10px 0;padding-left:22px;color:#475467}.static-footer .footer-inner{display:grid;gap:10px}.static-footer .footer-notice{color:rgba(255,255,255,.72);margin:0 auto;font-size:11px;line-height:1.6}
@media(max-width:900px){.seo-card-grid{grid-template-columns:1fr}.choice-mini-list{grid-template-columns:1fr}.seo-wrap .lead{font-size:15.5px}}

/* v19 domain SEO landing-page refinements */
a.nav-item{text-decoration:none;display:inline-flex;align-items:center;justify-content:center;}
.breadcrumb{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:-4px 0 16px;color:#667085;font-size:12px;font-weight:800}
.breadcrumb a{color:#1856cf;text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.breadcrumb span{color:#98a2b3}
.seo-lead{font-size:17px;line-height:1.9;color:#344054 !important;margin:0 0 18px !important}
.seo-kpi-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0 18px}
.seo-kpi-grid div{border:1px solid var(--line);background:linear-gradient(135deg,#fff,#f4f8ff);border-radius:18px;padding:16px;box-shadow:0 8px 22px rgba(22,34,51,.04)}
.seo-kpi-grid strong{display:block;font-size:30px;line-height:1;font-weight:900;color:#1856cf}.seo-kpi-grid span{display:block;margin-top:7px;color:#667085;font-size:12px;font-weight:800}
.seo-wrap a:not(.primary-btn):not(.secondary-btn):not(.mini-btn){color:#1856cf;font-weight:800}.seo-wrap a:hover{text-decoration:none}
.static-footer .footer-inner{max-width:980px}.static-footer .footer-notice{max-width:880px}
@media(max-width:720px){.seo-kpi-grid{grid-template-columns:1fr}.seo-lead{font-size:16px}}

/* v20 SEO internal link grids */
.seo-link-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:14px 0 20px}
.seo-mini-link{display:block;padding:10px 12px;border:1px solid var(--line);border-radius:14px;background:#fbfdff;text-decoration:none;color:#1856cf;font-weight:900;font-size:13px;text-align:center;box-shadow:0 6px 16px rgba(22,34,51,.03)}
.seo-mini-link:hover{background:#eef4ff;border-color:#cfe0ff;transform:translateY(-1px)}
@media(max-width:720px){.seo-link-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}


/* Human-readable sitemap */
.sitemap-wrap{width:min(1120px,calc(100% - 36px));}
.sitemap-layout{display:grid;gap:18px;margin-top:22px;}
.sitemap-section h2{margin:0 0 8px;font-size:21px;}
.sitemap-section p{margin:0 0 14px;color:#667085;line-height:1.7;}
.sitemap-link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;}
.sitemap-link-list a,.sitemap-item{display:block;text-decoration:none;border:1px solid var(--line);border-radius:14px;background:#fbfdff;padding:12px 13px;color:#1856cf;font-weight:800;line-height:1.45;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease,background .15s ease;}
.sitemap-link-list a:hover,.sitemap-item:hover{transform:translateY(-1px);border-color:#b9d3ff;background:#f3f8ff;box-shadow:0 10px 24px rgba(31,111,255,.08);}
.sitemap-item strong{display:block;color:#1856cf;font-size:14px;}
.sitemap-item span{display:block;margin-top:3px;color:#667085;font-size:12px;font-weight:700;}
@media(max-width:720px){.sitemap-link-list{grid-template-columns:1fr;}}


.site-logo{
  width:147px !important;
  height:64px !important;
}

.seo-logo img{
  width:127px !important;
  height:55px !important;
}
/* v21 compact navigation, clearer quiz progress, and mobile header tuning */
.site-header{
  min-height:64px !important;
  padding:7px 22px !important;
  gap:14px !important;
}
.site-logo{
  width:118px !important;
  height:52px !important;
  max-width:26vw !important;
  max-height:none !important;
}
.seo-header{
  min-height:58px;
  padding:7px 22px !important;
}
.seo-logo img{
  width:112px !important;
  height:49px !important;
  max-width:30vw !important;
  max-height:none !important;
}
.top-nav .nav-item{
  padding:8px 10px !important;
  font-size:12.5px !important;
}
.meter span.meter-pulse{
  animation:meterPulse .36s ease;
}
@keyframes meterPulse{
  0%{filter:brightness(1);}
  50%{filter:brightness(1.18);}
  100%{filter:brightness(1);}
}
@media(max-width:900px){
  .site-header{
    min-height:54px !important;
    padding:6px 10px 7px !important;
    gap:8px !important;
    overflow:hidden;
  }
  .site-logo{
    width:88px !important;
    height:38px !important;
    max-width:24vw !important;
  }
  .top-nav{
    flex:1 1 auto !important;
    gap:4px !important;
    padding:2px 0 !important;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scroll-snap-type:x proximity;
  }
  .top-nav .nav-item{
    font-size:10.8px !important;
    line-height:1 !important;
    min-height:31px;
    padding:6px 7px !important;
    scroll-snap-align:start;
  }
  .top-layout .view{padding:14px !important;}
  .quiz-only-view{padding-top:10px !important;}
  .hero{padding:22px !important;}
  .hero h1{font-size:27px !important;}
  .seo-header{
    display:flex !important;
    align-items:center !important;
    gap:8px !important;
    min-height:52px;
    padding:6px 10px !important;
    overflow:hidden;
  }
  .seo-logo img{
    width:84px !important;
    height:37px !important;
    max-width:24vw !important;
  }
  .seo-nav{
    flex:1 1 auto;
    flex-wrap:nowrap !important;
    justify-content:flex-start !important;
    margin-top:0 !important;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .seo-nav::-webkit-scrollbar{display:none;}
  .seo-nav a{
    white-space:nowrap;
    font-size:10.6px !important;
    padding:6px 7px !important;
  }
  .seo-wrap{
    width:calc(100% - 24px) !important;
    padding:18px !important;
    margin-top:14px !important;
  }
}
@media(max-width:560px){
  .site-header{min-height:50px !important;}
  .site-logo{
    width:74px !important;
    height:32px !important;
    max-width:22vw !important;
  }
  .top-nav .nav-item{
    font-size:10px !important;
    min-height:29px;
    padding:6px 6px !important;
  }
  .top-layout .view{padding:12px !important;}
  .hero-with-art{
    padding-bottom:104px !important;
    min-height:260px !important;
  }
  .hero-art-img{
    max-width:128px !important;
    max-height:112px !important;
  }
  .tabs{
    flex-wrap:nowrap !important;
    overflow-x:auto;
    padding-bottom:4px;
    scrollbar-width:none;
  }
  .tabs::-webkit-scrollbar{display:none;}
  .tab{
    white-space:nowrap;
    flex:0 0 auto;
    font-size:12px !important;
    padding:8px 10px !important;
  }
  .choice-grid{grid-template-columns:1fr !important;}
  .quiz-card{padding:18px !important;}
  .quiz-prompt{font-size:24px !important;}
  .session-progress{
    font-size:12px !important;
    gap:6px !important;
    padding:7px 9px !important;
  }
  .seo-logo img{
    width:72px !important;
    height:32px !important;
    max-width:22vw !important;
  }
}
@media(max-width:380px){
  .site-logo{
    width:66px !important;
    height:29px !important;
  }
  .top-nav .nav-item{
    font-size:9.6px !important;
    padding:6px 5px !important;
  }
  .seo-logo img{
    width:66px !important;
    height:29px !important;
  }
}

/* v22 keep mobile header on one compact row */
@media(max-width:900px){
  .site-header{
    flex-wrap:nowrap !important;
    align-items:center !important;
  }
  .top-nav{
    flex:1 1 0 !important;
    min-width:0 !important;
  }
}