/* V5 color system: contrast-first, balanced for long reading sessions */
:root{
  color-scheme:light;
  --bg:#f3f5f9;
  --bg-accent:#e9eef8;
  --panel:#ffffff;
  --panel-2:#f7f9fc;
  --panel-3:#eef2f7;
  --text:#172033;
  --text-strong:#0c1425;
  --muted:#53627a;
  --subtle:#718096;
  --line:#cfd8e6;
  --line-strong:#aebbd0;
  --primary:#3157d5;
  --primary-hover:#2447b8;
  --primary-contrast:#ffffff;
  --focus:#7290ff;
  --shadow:0 10px 30px rgba(29,43,76,.08);
  --shadow-raised:0 18px 48px rgba(29,43,76,.13);
  --b:#1d4ed8;
  --d:#6d28d9;
  --n:#047857;
  --m:#b45309;
  --danger:#b42318;
  --danger-bg:#fef3f2;
  --danger-border:#f4aaa4;
  --danger-text:#8f1d14;
  --success:#067647;
  --success-bg:#ecfdf3;
  --success-border:#79d9a7;
  --success-text:#055f3a;
  --warning:#9a5a08;
  --warning-bg:#fff8e7;
  --warning-border:#e9bd68;
  --warning-text:#784407;
  --radius:18px;
  --radius-sm:12px;
  --safe-bottom:env(safe-area-inset-bottom,0px)
}
html[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0b111c;
  --bg-accent:#101a2b;
  --panel:#131c2a;
  --panel-2:#182334;
  --panel-3:#202d40;
  --text:#edf2f8;
  --text-strong:#ffffff;
  --muted:#b5c0cf;
  --subtle:#91a0b4;
  --line:#35445a;
  --line-strong:#53647c;
  --primary:#86a2ff;
  --primary-hover:#a4b7ff;
  --primary-contrast:#091225;
  --focus:#9bb0ff;
  --shadow:0 12px 34px rgba(0,0,0,.28);
  --shadow-raised:0 22px 58px rgba(0,0,0,.42);
  --b:#82aaff;
  --d:#c49aff;
  --n:#64d8ad;
  --m:#f3b766;
  --danger:#ff8c82;
  --danger-bg:#321a1d;
  --danger-border:#8c4142;
  --danger-text:#ffc3bd;
  --success:#62d6a0;
  --success-bg:#102a23;
  --success-border:#32765d;
  --success-text:#baf1d7;
  --warning:#f3c36c;
  --warning-bg:#302717;
  --warning-border:#80632c;
  --warning-text:#ffe4a5
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.55}
button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}.hidden{display:none!important}
.app-header{position:sticky;top:0;z-index:50;display:flex;justify-content:space-between;align-items:center;padding:14px max(20px,calc((100vw - 1280px)/2));background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;background:var(--primary);color:var(--primary-contrast);font-weight:900;letter-spacing:.04em}.brand h1{font-size:18px;margin:0}.brand p{font-size:12px;color:var(--muted);margin:1px 0 0}.header-actions{display:flex;gap:8px}.icon-btn{border:1px solid var(--line);background:var(--panel);color:var(--text);width:42px;height:42px;border-radius:13px;font-size:20px}
.app-shell{max-width:1280px;margin:0 auto;padding:24px 20px calc(48px + var(--safe-bottom))}.tabs{display:flex;gap:6px;padding:5px;background:var(--panel);border:1px solid var(--line);border-radius:16px;width:max-content;margin-bottom:18px;box-shadow:var(--shadow)}.tab{border:0;background:transparent;color:var(--muted);padding:9px 18px;border-radius:11px;font-weight:700}.tab.active{background:var(--primary);color:var(--primary-contrast)}.view{display:none}.view.active{display:block}
body.session-active .tabs{display:none}body.session-active .app-shell{max-width:1480px}body.session-active #homeView>.hero-grid,body.session-active #resumePanel,body.session-active #setupPanel{display:none!important}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:18px;margin-bottom:18px}.intro-panel{padding:34px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:11px;font-weight:900;color:var(--muted)}.intro-panel h2,.panel-heading h2{font-size:clamp(26px,3.8vw,42px);line-height:1.15;margin:10px 0 12px}.intro-panel p{max-width:760px;color:var(--muted);font-size:15px}.quick-actions,.result-actions,.settings-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.primary-btn,.secondary-btn,.danger-btn,.text-btn{border:0;border-radius:13px;padding:11px 17px;font-weight:800}.primary-btn{background:var(--primary);color:var(--primary-contrast)}.secondary-btn{background:var(--panel-2);color:var(--text);border:1px solid var(--line)}.danger-btn{background:#fee2e2;color:#991b1b}.text-btn{background:transparent;color:var(--muted);padding-inline:4px}.danger-text{color:var(--danger)}.primary-btn.large{min-width:180px;padding:14px 22px}.compact-btn{padding:9px 13px;white-space:nowrap}
.stats-strip{display:grid;grid-template-columns:1fr 1fr;gap:10px}.stats-strip article{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:center;min-height:125px}.stats-strip span,.stats-strip small{color:var(--muted);font-size:12px}.stats-strip strong{font-size:30px;line-height:1.2;margin:6px 0}
.resume-panel{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:22px 26px;margin-bottom:18px;border-left:5px solid var(--m)}.resume-panel h2{margin:5px 0 2px;font-size:22px}.resume-panel p{margin:0;color:var(--muted)}.resume-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.setup-panel{padding:28px}.panel-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}.panel-heading h2{font-size:28px;margin:6px 0 0}.setup-grid{display:grid;grid-template-columns:2fr repeat(2,1fr);gap:22px;margin-top:24px}.setup-grid fieldset{border:0;padding:0;margin:0}.setup-grid legend{font-size:12px;font-weight:900;color:var(--muted);margin-bottom:9px}.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.case-option{position:relative;display:flex;align-items:center;gap:11px;padding:12px;border:1px solid var(--line);border-radius:15px;background:var(--panel-2);min-height:64px}.case-option input{width:18px;height:18px}.case-option span{display:flex;flex-direction:column;flex:1}.case-option small{color:var(--muted)}.case-option em{font-style:normal;font-size:12px;color:var(--muted)}.case-option:has(input:checked){outline:2px solid color-mix(in srgb,var(--case-color) 48%,transparent);background:color-mix(in srgb,var(--case-color) 7%,var(--panel))}.case-option.biernik{--case-color:var(--b)}.case-option.dopelniacz{--case-color:var(--d)}.case-option.narzednik{--case-color:var(--n)}.case-option.miejscownik{--case-color:var(--m)}
.select-control{width:100%;border:1px solid var(--line);background:var(--panel-2);color:var(--text);border-radius:13px;padding:12px 13px;min-height:48px}.segmented{display:flex;padding:4px;border:1px solid var(--line);background:var(--panel-2);border-radius:13px}.segmented button{display:flex;flex:1;flex-direction:column;align-items:center;justify-content:center;border:0;background:transparent;color:var(--muted);border-radius:9px;padding:8px 10px;font-weight:750;min-height:46px}.segmented button small{font-size:10px;font-weight:600}.segmented button.active{background:var(--panel);color:var(--text);box-shadow:0 2px 8px rgba(15,23,42,.08)}.segmented.compact button{min-height:38px;padding:7px 10px;flex-direction:row}.count-fieldset{grid-column:span 2}.count-presets{display:flex;flex-wrap:wrap;gap:7px}.count-presets button{border:1px solid var(--line);background:var(--panel-2);color:var(--text);border-radius:11px;min-width:52px;padding:9px 12px;font-weight:800}.count-presets button.active{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary)}.custom-count-row{display:flex;align-items:center;gap:8px;margin-top:9px}.custom-count-row input{width:130px;border:1px solid var(--line);background:var(--panel-2);color:var(--text);border-radius:11px;padding:10px 12px;font-size:16px}.setup-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:26px;padding-top:20px;color:var(--muted)}.setup-footer>div{display:flex;flex-direction:column}.setup-footer strong{color:var(--text)}.setup-footer small{margin-top:2px}
.practice-shell{position:relative}.session-toolbar{position:sticky;top:77px;z-index:35;display:grid;grid-template-columns:minmax(240px,1fr) minmax(240px,1.25fr) auto;align-items:center;gap:22px;padding:14px 16px;margin-bottom:16px;background:color-mix(in srgb,var(--panel) 94%,transparent);backdrop-filter:blur(16px)}.session-toolbar-left{display:flex;align-items:center;gap:15px}.session-toolbar-left .text-btn{white-space:nowrap}.session-mode-copy{display:flex;flex-direction:column}.session-mode-copy small,.session-progress-copy span{color:var(--muted);font-size:12px}.session-toolbar-center .progress-track{margin:6px 0 0}.session-progress-copy{display:flex;justify-content:space-between;gap:10px;font-size:12px}.session-progress-copy b{font-size:12px}.session-toolbar-actions{display:flex;gap:8px}.progress-track{height:7px;background:var(--panel-2);border-radius:99px;overflow:hidden}.progress-track span{display:block;height:100%;width:0;background:var(--primary);transition:width .25s ease}
.practice-panel{padding:26px;max-width:920px;margin:0 auto}.focus-nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;margin-top:16px}.focus-nav button:last-child{justify-self:end}.focus-nav span{font-weight:850;color:var(--muted)}
.question-card{position:relative;max-width:100%;background:var(--panel-2);border:1px solid var(--line);border-radius:20px;padding:clamp(20px,4vw,34px);scroll-margin-top:170px;content-visibility:auto;contain-intrinsic-size:auto 420px}.question-card.status-correct{border-color:#86efac}.question-card.status-wrong{border-color:#fca5a5}.question-card.status-active{outline:3px solid color-mix(in srgb,var(--primary) 30%,transparent)}.question-card-header{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}.question-id{font-size:12px;color:var(--muted);font-weight:900;letter-spacing:.08em}.question-meta{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px}.badge{display:inline-flex;align-items:center;min-height:27px;padding:3px 9px;border-radius:99px;background:var(--primary);color:var(--primary-contrast);font-size:11px;font-weight:850}.badge.neutral{background:var(--panel);color:var(--muted);border:1px solid var(--line)}.badge[data-case="biernik"]{background:var(--b)}.badge[data-case="dopelniacz"]{background:var(--d)}.badge[data-case="narzednik"]{background:var(--n)}.badge[data-case="miejscownik"]{background:var(--m)}.prompt{font-size:clamp(21px,4vw,31px);line-height:1.45;margin:18px 0 22px;font-weight:720}.hint-box{display:grid;grid-template-columns:auto 1fr auto 1fr;gap:8px 12px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin-bottom:18px}.hint-box span{font-size:11px;color:var(--muted);font-weight:850;text-transform:uppercase}.hint-box strong{font-size:14px}.answer-input{width:100%;border:2px solid var(--line);background:var(--panel);color:var(--text);border-radius:15px;padding:15px 16px;font-size:19px;outline:none}.answer-input:focus{border-color:var(--primary)}.answer-input[readonly]{opacity:.8}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice-btn{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:14px;padding:14px;text-align:left;font-weight:700;min-height:56px}.choice-btn.selected{outline:2px solid var(--primary);border-color:var(--primary)}.choice-btn.correct{background:#dcfce7;border-color:#86efac;color:#166534}.choice-btn.wrong{background:#fee2e2;border-color:#fca5a5;color:#991b1b}.question-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}.question-actions .retry-hint{margin-right:auto;color:var(--muted);font-size:12px;align-self:center}.feedback{margin-top:16px;border-radius:18px;padding:20px;border:1px solid var(--line);background:var(--panel)}.feedback.correct{border-color:#86efac;background:color-mix(in srgb,#dcfce7 72%,var(--panel))}.feedback.wrong{border-color:#fca5a5;background:color-mix(in srgb,#fee2e2 72%,var(--panel))}.feedback.diacritic{border-color:#fcd34d;background:color-mix(in srgb,#fef3c7 72%,var(--panel))}.feedback-title{display:flex;justify-content:space-between;font-size:18px}.answer-line{display:flex;gap:14px;align-items:baseline;margin-top:10px}.answer-line span{color:var(--muted);font-size:12px}.answer-line b{font-size:20px}.full-sentence{font-size:17px;font-weight:700}.feedback-details{margin-top:12px}.feedback-details summary{cursor:pointer;color:var(--muted);font-weight:800}.feedback dl{display:grid;gap:8px;margin:12px 0 0}.feedback dl div{display:grid;grid-template-columns:90px 1fr;gap:10px}.feedback dt{color:var(--muted);font-size:12px;font-weight:850}.feedback dd{margin:0}
.stream-layout,.stream-layout main,.stream-list{min-width:0}.stream-layout{display:grid;grid-template-columns:minmax(0,900px) 250px;gap:16px;align-items:start;justify-content:center}.stream-list{display:grid;gap:14px}.stream-list .question-card{padding:22px}.stream-list .prompt{font-size:22px;margin:14px 0 17px}.stream-list .hint-box{margin-bottom:14px}.desktop-navigator{position:sticky;top:174px;max-height:calc(100vh - 194px);overflow:auto;padding:14px}.desktop-navigator h3{margin:0 0 10px;font-size:15px}.desktop-navigator p{margin:0 0 10px;color:var(--muted);font-size:12px}.load-sentinel{height:30px;display:grid;place-items:center}.load-sentinel span{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.load-sentinel.done span{display:none}.stream-end-card{text-align:center;padding:24px;margin-top:10px}.stream-end-card h2{font-size:19px;margin:0}.stream-end-card p{color:var(--muted);margin:6px 0 16px}.shared-keyboard{position:sticky;bottom:12px;z-index:40;display:flex;align-items:center;justify-content:center;gap:12px;width:max-content;max-width:calc(100vw - 24px);margin:16px auto 0;padding:8px 10px;background:color-mix(in srgb,var(--panel) 95%,transparent);backdrop-filter:blur(14px)}.shared-keyboard>span{font-size:11px;color:var(--muted);font-weight:850}.shared-keyboard>div{display:flex;gap:5px;flex-wrap:wrap}.shared-keyboard button{border:1px solid var(--line);background:var(--panel-2);color:var(--text);border-radius:8px;width:36px;height:34px;font-weight:850}
.navigator-dialog,.settings-dialog{width:min(620px,calc(100vw - 24px));max-height:85vh;border:1px solid var(--line);border-radius:20px;background:var(--panel);color:var(--text);padding:22px;box-shadow:0 30px 90px rgba(0,0,0,.35)}.navigator-dialog::backdrop,.settings-dialog::backdrop{background:rgba(2,6,23,.55);backdrop-filter:blur(4px)}.dialog-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.dialog-heading h2{margin:0}.dialog-heading p{margin:3px 0 0;color:var(--muted)}.navigator-legend{display:flex;flex-wrap:wrap;gap:12px;margin:14px 0;font-size:12px;color:var(--muted)}.navigator-legend span{display:flex;align-items:center;gap:5px}.nav-dot{width:11px;height:11px;border:1px solid var(--line);border-radius:3px;background:var(--panel-2)}.nav-dot.filled{background:#94a3b8}.nav-dot.correct{background:var(--success)}.nav-dot.wrong{background:var(--danger)}.navigator-shortcuts{display:flex;gap:8px;margin-bottom:12px}.navigator-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:6px}.nav-number{position:relative;display:grid;place-items:center;aspect-ratio:1;border:1px solid var(--line);background:var(--panel-2);color:var(--text);border-radius:9px;font-size:12px;font-weight:850}.nav-number.filled{background:#cbd5e1;color:#0f172a}.nav-number.correct{background:#dcfce7;border-color:#86efac;color:#166534}.nav-number.wrong{background:#fee2e2;border-color:#fca5a5;color:#991b1b}.nav-number.diacritic{background:#fef3c7;border-color:#fcd34d;color:#92400e}.nav-number.current{outline:2px solid var(--primary)}
.result-panel{max-width:920px;margin:0 auto;padding:34px}.result-score{display:flex;align-items:baseline;gap:14px}.result-score strong{font-size:56px}.result-score span{color:var(--muted)}.result-breakdown{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.result-breakdown span{border:1px solid var(--line);background:var(--panel-2);border-radius:99px;padding:5px 10px;font-size:12px}.result-filter{margin-top:20px;max-width:520px}.result-list{display:grid;gap:8px;margin-top:14px}.result-item{border:1px solid var(--line);border-radius:13px;padding:12px 14px;background:var(--panel-2)}.result-item strong{display:block}.result-item small{display:block;color:var(--muted);margin-top:3px}.result-item.correct{border-left:4px solid var(--success)}.result-item.wrong{border-left:4px solid var(--danger)}.result-item.skipped{border-left:4px solid var(--m)}
.stats-panel{padding:26px}.stats-detail-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0}.case-stat-card{padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--panel-2)}.case-stat-card h3{margin:0}.case-stat-card strong{font-size:28px}.mini-progress{height:7px;background:var(--panel);border-radius:99px;overflow:hidden;margin-top:10px}.mini-progress span{display:block;height:100%;background:var(--primary)}.theme-stats{display:grid;gap:10px}.theme-stat{display:grid;grid-template-columns:minmax(160px,1fr) 3fr auto;align-items:center;gap:12px}.theme-stat small{color:var(--muted)}
.rules-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.rule-card{background:var(--panel);border:1px solid var(--line);border-top:5px solid var(--case-color);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow)}.rule-card.biernik{--case-color:var(--b)}.rule-card.dopelniacz{--case-color:var(--d)}.rule-card.narzednik{--case-color:var(--n)}.rule-card.miejscownik{--case-color:var(--m)}.rule-card h2{margin:0}.rule-card h2 small{display:block;color:var(--muted);font-size:13px}.rule-card p{color:var(--muted)}.rule-card li{margin:7px 0}.contrast-panel{margin-top:16px;padding:24px}.contrast-row{display:grid;grid-template-columns:130px 150px 1fr;gap:12px;border-top:1px solid var(--line);padding:12px 0}.contrast-row span{color:var(--muted)}.contrast-row em{font-style:normal}
.settings-dialog{padding:0}.settings-dialog form{padding:24px}.file-btn{display:inline-flex;align-items:center}.file-btn input{display:none}.toggle-row{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-top:14px}.settings-dialog hr{border:0;border-top:1px solid var(--line);margin:22px 0}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:1100px){.stream-layout{grid-template-columns:minmax(0,900px)}.desktop-navigator{display:none}}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr}.setup-grid{grid-template-columns:1fr 1fr}.case-fieldset,.count-fieldset{grid-column:1/-1}.stats-detail-grid{grid-template-columns:1fr 1fr}.session-toolbar{grid-template-columns:1fr auto}.session-toolbar-center{grid-column:1/-1;grid-row:2}.session-toolbar-actions{grid-column:2;grid-row:1}}
@media(max-width:640px){
  .app-header{padding:10px 12px}.brand p{display:none}.brand h1{font-size:16px}.app-shell{padding:14px 10px calc(86px + var(--safe-bottom))}.tabs{position:fixed;z-index:45;bottom:calc(8px + var(--safe-bottom));left:50%;transform:translateX(-50%);margin:0;width:calc(100% - 20px);justify-content:space-around}.tab{flex:1;padding:11px 8px}.intro-panel,.setup-panel,.practice-panel,.result-panel{padding:20px}.intro-panel h2{font-size:28px}.stats-strip article{min-height:104px;padding:14px}.resume-panel{align-items:flex-start;flex-direction:column;padding:20px}.resume-actions{width:100%;justify-content:space-between}.case-grid,.setup-grid,.choice-grid,.rules-grid,.stats-detail-grid{grid-template-columns:1fr}.case-fieldset,.count-fieldset{grid-column:auto}.setup-footer{align-items:stretch;flex-direction:column}.primary-btn.large{width:100%}.segmented button{padding:7px 5px}.hint-box{grid-template-columns:auto 1fr}.hint-box span:nth-of-type(2){margin-top:4px}.prompt{font-size:22px}.question-card{padding:18px;scroll-margin-top:188px}.question-card-header{flex-direction:column}.question-meta{justify-content:flex-start}.question-actions{position:static;padding-top:0}.question-actions button{flex:1}.question-actions .retry-hint{display:none}.feedback dl div{grid-template-columns:1fr}.theme-stat{grid-template-columns:1fr auto}.theme-stat .mini-progress{grid-column:1/-1;grid-row:2}.contrast-row{grid-template-columns:1fr}.session-toolbar{top:63px;grid-template-columns:1fr;padding:11px;margin:0 -2px 12px}.session-toolbar-left{justify-content:space-between}.session-mode-copy{text-align:right}.session-toolbar-actions{position:fixed;z-index:42;left:10px;right:10px;bottom:calc(8px + var(--safe-bottom));width:auto;grid-column:auto;grid-row:auto;display:grid;grid-template-columns:1fr 1fr;padding:6px;background:color-mix(in srgb,var(--panel) 95%,transparent);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);backdrop-filter:blur(14px)}.session-toolbar-center{grid-column:1;grid-row:2}.practice-shell{padding-bottom:76px}.focus-nav{margin-bottom:8px}.stream-list{gap:10px}.stream-list .question-card{padding:18px}.stream-list .prompt{font-size:20px}.shared-keyboard{bottom:78px;flex-direction:column;gap:4px;width:calc(100% - 8px)}.shared-keyboard>span{display:none}.shared-keyboard>div{width:100%;justify-content:center;flex-wrap:nowrap}.shared-keyboard button{flex:1;max-width:42px;min-width:28px}.navigator-dialog{width:100%;max-height:82vh;margin:auto 0 0;border-radius:22px 22px 0 0}.navigator-grid{grid-template-columns:repeat(7,1fr)}.navigator-shortcuts{display:grid;grid-template-columns:1fr 1fr}.result-score strong{font-size:48px}.result-filter{overflow:auto}.result-filter button{white-space:nowrap}.answer-input{font-size:16px}.stream-end-card{margin-bottom:20px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.load-sentinel span{animation:none}}

/* Grammar teaching hub */
.grammar-view{--case-color:var(--b)}
.grammar-hero{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:30px;margin-bottom:16px;background:linear-gradient(135deg,color-mix(in srgb,var(--panel) 94%,var(--b) 6%),var(--panel))}
.grammar-hero h2{font-size:clamp(27px,4vw,42px);line-height:1.15;margin:8px 0 12px}.grammar-hero p{max-width:840px;color:var(--muted);margin:0}.grammar-hero-actions,.lesson-actions{display:flex;flex-wrap:wrap;gap:9px;flex-shrink:0}
.grammar-case-tabs{position:sticky;top:78px;z-index:24;display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:8px;margin-bottom:16px;border:1px solid var(--line);border-radius:18px;background:color-mix(in srgb,var(--panel) 94%,transparent);box-shadow:var(--shadow);backdrop-filter:blur(16px)}
.grammar-case-tabs button{--case-color:var(--b);display:flex;align-items:center;justify-content:center;gap:7px;min-height:52px;border:1px solid transparent;border-radius:12px;background:transparent;color:var(--muted);font-weight:850}.grammar-case-tabs button small{font-size:11px}.grammar-case-tabs button.biernik{--case-color:var(--b)}.grammar-case-tabs button.dopelniacz{--case-color:var(--d)}.grammar-case-tabs button.narzednik{--case-color:var(--n)}.grammar-case-tabs button.miejscownik{--case-color:var(--m)}.grammar-case-tabs button.active{color:var(--text);border-color:color-mix(in srgb,var(--case-color) 36%,var(--line));background:color-mix(in srgb,var(--case-color) 10%,var(--panel));box-shadow:inset 0 -3px 0 var(--case-color)}
.grammar-lesson{--case-color:var(--b);padding:30px;border-top:5px solid var(--case-color);margin-bottom:16px;scroll-margin-top:154px}.grammar-lesson.biernik{--case-color:var(--b)}.grammar-lesson.dopelniacz{--case-color:var(--d)}.grammar-lesson.narzednik{--case-color:var(--n)}.grammar-lesson.miejscownik{--case-color:var(--m)}
.lesson-header{display:flex;justify-content:space-between;gap:28px;align-items:flex-start;padding-bottom:22px;border-bottom:1px solid var(--line)}.lesson-header h2{font-size:34px;line-height:1.2;margin:4px 0 8px}.lesson-header h2 small{font-size:15px;color:var(--muted)}.lesson-header p{max-width:880px;margin:0;color:var(--muted)}.case-question{display:inline-flex;padding:4px 10px;border-radius:99px;color:var(--case-color);background:color-mix(in srgb,var(--case-color) 10%,var(--panel));font-size:12px;font-weight:900}
.lesson-block{min-width:0;margin-top:24px}.lesson-block h3{font-size:18px;margin:0 0 12px}.usage-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.usage-grid article{padding:15px;border:1px solid var(--line);border-radius:15px;background:var(--panel-2)}.usage-grid b{display:block}.usage-grid p{min-height:45px;margin:6px 0;color:var(--muted);font-size:13px}.usage-grid em{display:block;color:var(--text);font-style:normal;font-size:13px;font-weight:700}
.lesson-columns{display:grid;grid-template-columns:1.06fr .94fr;gap:18px}.compact-columns{grid-template-columns:.85fr 1.15fr}.grammar-table-wrap{max-width:100%;overflow:auto;border:1px solid var(--line);border-radius:15px;background:var(--panel);overscroll-behavior-inline:contain}.grammar-table{width:100%;min-width:620px;border-collapse:collapse;font-size:13px}.grammar-table th,.grammar-table td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.grammar-table th{position:sticky;top:0;background:var(--panel-2);color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap}.grammar-table tr:last-child td{border-bottom:0}.grammar-table td:first-child{font-weight:850;white-space:nowrap}.pronoun-strip,.grammar-note{display:flex;gap:12px;align-items:flex-start;margin-top:10px;padding:13px 14px;border:1px solid var(--line);border-radius:13px;background:var(--panel-2)}.pronoun-strip b,.grammar-note b{flex:0 0 auto}.pronoun-strip span,.grammar-note span{color:var(--muted)}
.transformation-list{display:grid;gap:8px}.transformation-list div{display:grid;grid-template-columns:minmax(140px,.8fr) auto minmax(0,1.6fr);align-items:center;gap:10px;padding:11px 13px;border:1px solid var(--line);border-radius:12px;background:var(--panel-2)}.transformation-list span{color:var(--muted)}.transformation-list b{color:var(--case-color)}.transformation-list em{font-style:normal;font-weight:750}.warning-block{padding:18px;border-radius:16px;background:color-mix(in srgb,#fef3c7 70%,var(--panel));border:1px solid color-mix(in srgb,#f59e0b 45%,var(--line))}.warning-block ol{margin:0;padding-left:22px}.warning-block li{margin:8px 0}
.grammar-tool-section{padding:28px;margin-top:16px;scroll-margin-top:150px}.grammar-tool-section .panel-heading h2{font-size:27px}.tool-badge{display:inline-flex;align-items:center;padding:5px 10px;border:1px solid var(--line);border-radius:99px;background:var(--panel-2);color:var(--muted);font-size:11px;font-weight:800}
.case-judge-layout{display:grid;grid-template-columns:minmax(280px,.9fr) minmax(320px,1.1fr);gap:16px;margin-top:20px}.case-judge-options{display:grid;grid-template-columns:1fr 1fr;gap:8px;max-height:430px;overflow:auto;padding-right:3px}.case-judge-options button{display:flex;flex-direction:column;align-items:flex-start;gap:3px;text-align:left;border:1px solid var(--line);border-radius:13px;background:var(--panel-2);color:var(--text);padding:11px 12px}.case-judge-options button small{color:var(--muted)}.case-judge-options button.active{outline:2px solid var(--primary);background:var(--panel)}.case-judge-result{--case-color:var(--b);display:flex;min-height:310px;flex-direction:column;justify-content:center;align-items:flex-start;padding:30px;border:1px solid color-mix(in srgb,var(--case-color) 35%,var(--line));border-radius:18px;background:linear-gradient(145deg,color-mix(in srgb,var(--case-color) 11%,var(--panel)),var(--panel))}.case-judge-result.biernik{--case-color:var(--b)}.case-judge-result.dopelniacz{--case-color:var(--d)}.case-judge-result.narzednik{--case-color:var(--n)}.case-judge-result.miejscownik{--case-color:var(--m)}.case-judge-result>span{color:var(--muted);font-size:12px;font-weight:850}.case-judge-result h3{font-size:34px;margin:4px 0}.case-judge-result h3 small{display:block;font-size:14px;color:var(--muted)}.case-judge-result .judge-question{padding:5px 9px;border-radius:9px;background:color-mix(in srgb,var(--case-color) 12%,var(--panel));color:var(--case-color);font-weight:850}.case-judge-result p{font-size:20px;font-weight:750}
.declension-controls{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}.declension-controls label{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:12px;font-weight:800}.declension-base{display:flex;align-items:baseline;gap:10px;margin-bottom:10px;padding:13px 15px;border:1px dashed var(--line);border-radius:13px}.declension-base span,.declension-base small{color:var(--muted)}.declension-base b{font-size:22px}.declension-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.declension-card{--case-color:var(--b);padding:17px;border:1px solid color-mix(in srgb,var(--case-color) 28%,var(--line));border-left:4px solid var(--case-color);border-radius:15px;background:color-mix(in srgb,var(--case-color) 5%,var(--panel-2))}.declension-card.biernik{--case-color:var(--b)}.declension-card.dopelniacz{--case-color:var(--d)}.declension-card.narzednik{--case-color:var(--n)}.declension-card.miejscownik{--case-color:var(--m)}.declension-card>div{display:flex;justify-content:space-between;gap:8px;color:var(--case-color)}.declension-card>div span{font-weight:900}.declension-card>div small{color:var(--muted)}.declension-card>strong{display:block;font-size:22px;margin:8px 0}.declension-card p{margin:0;color:var(--muted)}.declension-card p b{color:var(--text)}
.time-grammar-tabs{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0 12px}.time-grammar-tabs button{border:1px solid var(--line);border-radius:11px;background:var(--panel-2);color:var(--text);padding:9px 13px;font-weight:800}.time-grammar-tabs button.active{background:var(--primary);color:var(--primary-contrast)}.time-topic-intro{color:var(--muted)}
.contrast-lab-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}.contrast-lab-card{border:1px solid var(--line);border-radius:16px;background:var(--panel-2);padding:16px}.contrast-lab-card h3{margin:0 0 10px;font-size:16px}.contrast-pair{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:stretch}.contrast-pair>div{padding:11px;border-radius:11px;background:var(--panel)}.contrast-pair>span{align-self:center;color:var(--muted);font-weight:900}.contrast-pair b{font-size:12px;color:var(--muted)}.contrast-pair p{margin:6px 0;font-weight:800}.contrast-pair small{color:var(--muted)}

@media(max-width:980px){
  .grammar-hero,.lesson-header{align-items:flex-start;flex-direction:column}.grammar-hero-actions,.lesson-actions{width:100%}.usage-grid{grid-template-columns:1fr 1fr}.lesson-columns,.compact-columns{grid-template-columns:1fr}.case-judge-layout{grid-template-columns:1fr}.case-judge-options{max-height:none}.contrast-lab-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .grammar-hero,.grammar-lesson,.grammar-tool-section{padding:20px}.grammar-hero-actions button,.lesson-actions button{flex:1}.grammar-case-tabs{top:64px;grid-template-columns:repeat(4,minmax(92px,1fr));overflow-x:auto;padding:6px;margin-inline:-2px}.grammar-case-tabs button{flex-direction:column;gap:0;min-height:55px;padding:6px}.grammar-case-tabs button small{font-size:9px}.lesson-header h2{font-size:28px}.usage-grid,.case-judge-options,.declension-controls,.declension-grid{grid-template-columns:1fr}.usage-grid article p{min-height:0}.grammar-table{min-width:680px}.grammar-table-wrap{margin-inline:-2px}.transformation-list div{grid-template-columns:1fr auto}.transformation-list em{grid-column:1/-1}.case-judge-result{min-height:240px;padding:22px}.case-judge-result h3{font-size:29px}.declension-card>div{flex-direction:column}.contrast-pair{grid-template-columns:1fr}.contrast-pair>span{justify-self:center;transform:rotate(90deg)}.tool-badge{display:none}.time-grammar-tabs{display:grid;grid-template-columns:1fr 1fr}.time-grammar-tabs button:last-child{grid-column:1/-1}.pronoun-strip,.grammar-note{flex-direction:column;gap:4px}
}

/* ─────────────────────────────────────────────────────────────
   Modern reading experience overrides
   ───────────────────────────────────────────────────────────── */
html{background:var(--bg);font-size:16px;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
body{
  min-height:100vh;
  background:
    radial-gradient(circle at 12% -10%,color-mix(in srgb,var(--primary) 9%,transparent),transparent 32rem),
    linear-gradient(180deg,var(--bg-accent) 0,var(--bg) 18rem,var(--bg) 100%);
  color:var(--text);
  font-family:Inter,"SF Pro Text","Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",Arial,sans-serif;
  font-size:16px;
  line-height:1.68;
  letter-spacing:.005em;
}
::selection{background:color-mix(in srgb,var(--primary) 26%,transparent);color:var(--text-strong)}
button,input,select{letter-spacing:inherit}
button{transition:background-color .16s ease,border-color .16s ease,color .16s ease,box-shadow .16s ease,transform .16s ease}
button:not(:disabled):active{transform:translateY(1px)}
button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,label:has(input:focus-visible){outline:3px solid color-mix(in srgb,var(--focus) 58%,transparent);outline-offset:2px}
a{color:var(--primary)}
h1,h2,h3,h4,strong,b{color:var(--text-strong)}
p{overflow-wrap:anywhere}

.app-header{
  min-height:70px;
  padding-block:12px;
  background:color-mix(in srgb,var(--panel) 88%,transparent);
  border-bottom-color:color-mix(in srgb,var(--line) 80%,transparent);
  box-shadow:0 1px 0 color-mix(in srgb,var(--line) 45%,transparent);
}
.brand{gap:13px}.brand-mark{width:44px;height:44px;border-radius:13px;background:linear-gradient(145deg,var(--primary),color-mix(in srgb,var(--primary) 72%,#111827));box-shadow:0 8px 22px color-mix(in srgb,var(--primary) 23%,transparent)}
.brand h1{font-size:18px;line-height:1.25;letter-spacing:-.015em}.brand p{font-size:12px;color:var(--muted);line-height:1.35;margin-top:3px}
.header-actions{gap:9px}.icon-btn{display:grid;place-items:center;width:44px;height:44px;border-color:var(--line);border-radius:12px;background:var(--panel);color:var(--text-strong);box-shadow:0 2px 8px rgba(23,32,51,.05)}
.icon-btn:hover{border-color:var(--line-strong);background:var(--panel-2)}.theme-toggle span{font-size:19px;line-height:1}

.app-shell{max-width:1220px;padding-top:28px}.tabs{gap:4px;margin-bottom:22px;padding:4px;border-radius:14px;background:color-mix(in srgb,var(--panel) 96%,transparent);box-shadow:0 5px 18px rgba(29,43,76,.07)}
.tab{min-height:42px;padding:9px 20px;border-radius:10px;color:var(--muted);font-weight:760}.tab:hover{color:var(--text-strong);background:var(--panel-2)}.tab.active{background:var(--primary);color:var(--primary-contrast);box-shadow:0 5px 14px color-mix(in srgb,var(--primary) 24%,transparent)}

.panel{border-color:var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-grid{grid-template-columns:minmax(0,1.4fr) minmax(340px,.8fr);gap:20px;margin-bottom:20px}.intro-panel{padding:40px 42px;background:linear-gradient(145deg,var(--panel),color-mix(in srgb,var(--primary) 3%,var(--panel-2)))}
.eyebrow{color:var(--primary);font-size:11px;letter-spacing:.11em}.intro-panel h2,.panel-heading h2{color:var(--text-strong);letter-spacing:-.035em}.intro-panel h2{max-width:780px;font-size:clamp(30px,4vw,44px);line-height:1.13;margin:12px 0 16px}.intro-panel p{max-width:780px;color:var(--muted);font-size:16px;line-height:1.75;margin:0}.quick-actions{margin-top:26px}
.primary-btn,.secondary-btn,.danger-btn,.text-btn{min-height:44px;border-radius:12px;padding:11px 18px;font-weight:780}.primary-btn{background:var(--primary);color:var(--primary-contrast);box-shadow:0 7px 18px color-mix(in srgb,var(--primary) 22%,transparent)}.primary-btn:hover{background:var(--primary-hover);box-shadow:0 9px 22px color-mix(in srgb,var(--primary) 28%,transparent)}
.secondary-btn{background:var(--panel);border-color:var(--line);color:var(--text-strong);box-shadow:0 2px 7px rgba(23,32,51,.04)}.secondary-btn:hover{border-color:var(--line-strong);background:var(--panel-2)}
.danger-btn{background:var(--danger-bg);border:1px solid var(--danger-border);color:var(--danger-text)}.text-btn{color:var(--muted)}.text-btn:hover{color:var(--text-strong);background:var(--panel-2)}.danger-text{color:var(--danger)}

.stats-strip{gap:12px}.stats-strip article{min-height:128px;padding:20px;border-radius:16px;background:var(--panel)}.stats-strip span,.stats-strip small{color:var(--muted);font-size:12px}.stats-strip strong{color:var(--text-strong);font-size:31px;letter-spacing:-.035em}
.resume-panel{padding:24px 28px;margin-bottom:20px;border-left-color:var(--m);background:linear-gradient(90deg,color-mix(in srgb,var(--m) 8%,var(--panel)),var(--panel) 32%)}

.setup-panel{padding:32px}.panel-heading{align-items:center}.panel-heading h2{font-size:30px;line-height:1.22}.setup-grid{grid-template-columns:2fr repeat(2,minmax(190px,1fr));gap:14px;margin-top:26px}.setup-grid fieldset{min-width:0;padding:16px;border:1px solid var(--line);border-radius:15px;background:var(--panel-2)}.setup-grid legend{float:left;width:100%;margin:0 0 12px;color:var(--text-strong);font-size:12px;letter-spacing:.035em}.setup-grid fieldset>*:not(legend){clear:both}
.case-fieldset{padding:16px!important}.case-grid{gap:9px}.case-option{min-height:68px;padding:12px 13px;border-color:var(--line);background:var(--panel);border-radius:13px}.case-option:hover{border-color:var(--line-strong)}.case-option small,.case-option em{color:var(--muted)}.case-option:has(input:checked){outline:0;border-color:color-mix(in srgb,var(--case-color) 58%,var(--line));box-shadow:inset 4px 0 0 var(--case-color);background:color-mix(in srgb,var(--case-color) 8%,var(--panel))}.case-option input{accent-color:var(--case-color)}
.select-control,.custom-count-row input{min-height:48px;border-color:var(--line);background:var(--panel);color:var(--text-strong)}.select-control:hover,.custom-count-row input:hover{border-color:var(--line-strong)}
.segmented{padding:4px;border-color:var(--line);background:var(--panel-3)}.segmented button{color:var(--muted);font-weight:720}.segmented button:hover{color:var(--text-strong)}.segmented button.active{background:var(--panel);color:var(--text-strong);box-shadow:0 3px 10px rgba(23,32,51,.1)}
.count-presets button{min-height:42px;border-color:var(--line);background:var(--panel);color:var(--text-strong)}.count-presets button:hover{border-color:var(--line-strong);background:var(--panel-3)}.count-presets button.active{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary);box-shadow:0 5px 13px color-mix(in srgb,var(--primary) 22%,transparent)}
.setup-footer{margin-top:28px;padding-top:22px}.setup-footer strong{color:var(--text-strong);font-size:16px}.setup-footer small{color:var(--muted)}

.session-toolbar{top:82px;padding:14px 18px;border-color:var(--line);background:color-mix(in srgb,var(--panel) 92%,transparent);box-shadow:0 8px 26px rgba(20,30,49,.1)}.session-mode-copy strong,.session-progress-copy b{color:var(--text-strong)}.progress-track{height:8px;background:var(--panel-3)}.progress-track span,.mini-progress span{background:linear-gradient(90deg,var(--primary),color-mix(in srgb,var(--primary) 66%,#7c3aed))}
.practice-panel{max-width:940px;padding:28px}.question-card{background:var(--panel);border-color:var(--line);box-shadow:0 6px 20px rgba(23,32,51,.06)}.question-card.status-correct{border-color:var(--success-border);box-shadow:0 7px 24px color-mix(in srgb,var(--success) 10%,transparent)}.question-card.status-wrong{border-color:var(--danger-border);box-shadow:0 7px 24px color-mix(in srgb,var(--danger) 10%,transparent)}.question-card.status-active{outline-color:color-mix(in srgb,var(--focus) 58%,transparent)}
.question-id{color:var(--subtle)}.badge{font-weight:800;letter-spacing:.01em}.badge.neutral{background:var(--panel-2);color:var(--muted);border-color:var(--line)}.badge[data-case="biernik"],.badge[data-case="dopelniacz"],.badge[data-case="narzednik"],.badge[data-case="miejscownik"]{color:var(--primary-contrast)}
.prompt{max-width:36em;color:var(--text-strong);font-size:clamp(22px,3vw,30px);font-weight:690;line-height:1.55;letter-spacing:-.018em}.hint-box{padding:14px 16px;border-color:var(--line);background:var(--panel-2)}.hint-box span{color:var(--subtle)}.hint-box strong{color:var(--text-strong);font-size:15px}
.answer-input{border-color:var(--line-strong);background:var(--panel-2);color:var(--text-strong)}.answer-input:hover{border-color:color-mix(in srgb,var(--primary) 48%,var(--line))}.answer-input:focus{border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--focus) 18%,transparent);background:var(--panel)}.answer-input::placeholder{color:var(--subtle)}
.choice-btn{border-color:var(--line);background:var(--panel-2);color:var(--text-strong)}.choice-btn:hover{border-color:var(--line-strong);background:var(--panel-3)}.choice-btn.selected{outline-color:var(--focus);border-color:var(--primary);background:color-mix(in srgb,var(--primary) 9%,var(--panel))}.choice-btn.correct{background:var(--success-bg);border-color:var(--success-border);color:var(--success-text)}.choice-btn.wrong{background:var(--danger-bg);border-color:var(--danger-border);color:var(--danger-text)}
.feedback{border-color:var(--line);background:var(--panel-2)}.feedback.correct{border-color:var(--success-border);background:var(--success-bg);color:var(--success-text)}.feedback.wrong{border-color:var(--danger-border);background:var(--danger-bg);color:var(--danger-text)}.feedback.diacritic{border-color:var(--warning-border);background:var(--warning-bg);color:var(--warning-text)}.feedback.correct .answer-line span,.feedback.wrong .answer-line span,.feedback.diacritic .answer-line span,.feedback.correct summary,.feedback.wrong summary,.feedback.diacritic summary{color:currentColor;opacity:.82}.feedback dd,.full-sentence{color:var(--text-strong)}
.stream-list{gap:18px}.stream-list .question-card{padding:26px}.desktop-navigator{padding:16px;background:color-mix(in srgb,var(--panel) 96%,transparent)}.stream-end-card{padding:28px;background:var(--panel)}
.shared-keyboard{border-color:var(--line);background:color-mix(in srgb,var(--panel) 93%,transparent);box-shadow:var(--shadow-raised)}.shared-keyboard button{border-color:var(--line);background:var(--panel-2);color:var(--text-strong)}.shared-keyboard button:hover{background:var(--panel-3);border-color:var(--line-strong)}

.navigator-dialog,.settings-dialog{border-color:var(--line);background:var(--panel);box-shadow:var(--shadow-raised)}.navigator-dialog::backdrop,.settings-dialog::backdrop{background:rgba(5,9,16,.68)}.dialog-heading p,.navigator-legend{color:var(--muted)}
.nav-dot,.nav-number{border-color:var(--line);background:var(--panel-2)}.nav-dot.filled,.nav-number.filled{background:var(--panel-3);color:var(--text-strong)}.nav-number.correct{background:var(--success-bg);border-color:var(--success-border);color:var(--success-text)}.nav-number.wrong{background:var(--danger-bg);border-color:var(--danger-border);color:var(--danger-text)}.nav-number.diacritic{background:var(--warning-bg);border-color:var(--warning-border);color:var(--warning-text)}.nav-number.current{outline-color:var(--focus)}
.appearance-setting{display:grid;grid-template-columns:minmax(170px,1fr) minmax(260px,1.3fr);align-items:center;gap:18px;margin:22px 0;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)}.appearance-setting>div:first-child{display:flex;flex-direction:column;gap:2px}.appearance-setting small{color:var(--muted)}.theme-mode-control{width:100%}.settings-dialog hr{border-top-color:var(--line)}

.result-panel{max-width:940px;padding:38px}.result-score strong{color:var(--text-strong);letter-spacing:-.05em}.result-breakdown span,.result-item{border-color:var(--line);background:var(--panel-2)}.result-item.correct{border-left-color:var(--success)}.result-item.wrong{border-left-color:var(--danger)}.result-item.skipped{border-left-color:var(--warning)}
.stats-panel{padding:32px}.case-stat-card{padding:20px;border-color:var(--line);background:var(--panel-2)}.case-stat-card p{color:var(--muted)}.mini-progress{background:var(--panel-3)}

/* Grammar area: stronger hierarchy and calmer reading width */
.grammar-hero{padding:38px 40px;margin-bottom:18px;background:linear-gradient(135deg,color-mix(in srgb,var(--primary) 8%,var(--panel)),var(--panel) 58%)}.grammar-hero h2{max-width:820px;color:var(--text-strong);font-size:clamp(30px,4vw,43px);letter-spacing:-.035em}.grammar-hero p{max-width:820px;color:var(--muted);font-size:16px;line-height:1.78}
.grammar-case-tabs{top:82px;gap:7px;padding:7px;border-color:var(--line);background:color-mix(in srgb,var(--panel) 91%,transparent);box-shadow:0 8px 26px rgba(20,30,49,.1)}.grammar-case-tabs button{min-height:54px;color:var(--muted)}.grammar-case-tabs button:hover{color:var(--text-strong);background:var(--panel-2)}.grammar-case-tabs button.active{color:var(--text-strong);border-color:color-mix(in srgb,var(--case-color) 48%,var(--line));background:color-mix(in srgb,var(--case-color) 10%,var(--panel));box-shadow:inset 0 -3px 0 var(--case-color)}
.grammar-lesson{padding:38px 40px;border-top-width:4px}.lesson-header{gap:34px;padding-bottom:28px}.lesson-header>div:first-child{max-width:850px}.lesson-header h2{color:var(--text-strong);font-size:36px;letter-spacing:-.03em}.lesson-header h2 small{color:var(--muted)}.lesson-header p{color:var(--muted);font-size:15.5px;line-height:1.8}.case-question{border:1px solid color-mix(in srgb,var(--case-color) 28%,var(--line));background:color-mix(in srgb,var(--case-color) 9%,var(--panel))}
.lesson-block{margin-top:30px}.lesson-block h3{margin-bottom:15px;color:var(--text-strong);font-size:20px;letter-spacing:-.015em}.usage-grid{gap:12px}.usage-grid article{padding:18px;border-color:var(--line);background:var(--panel-2)}.usage-grid article:hover{border-color:var(--line-strong)}.usage-grid b{font-size:15px}.usage-grid p{color:var(--muted);font-size:13.5px;line-height:1.65}.usage-grid em{color:var(--text-strong);font-size:13.5px;line-height:1.65}
.lesson-columns{gap:22px}.grammar-table-wrap{border-color:var(--line);background:var(--panel)}.grammar-table{font-size:14px;line-height:1.58}.grammar-table th,.grammar-table td{padding:13px 14px;border-bottom-color:var(--line)}.grammar-table th{background:var(--panel-3);color:var(--text-strong);font-size:11px}.grammar-table tbody tr:nth-child(even){background:color-mix(in srgb,var(--panel-2) 72%,transparent)}.grammar-table tbody tr:hover{background:color-mix(in srgb,var(--primary) 6%,var(--panel))}
.pronoun-strip,.grammar-note{padding:15px 16px;border-color:var(--line);background:var(--panel-2)}.pronoun-strip span,.grammar-note span{color:var(--muted);line-height:1.7}.transformation-list{gap:10px}.transformation-list div{padding:13px 15px;border-color:var(--line);background:var(--panel-2)}.transformation-list span{color:var(--muted)}.warning-block{padding:20px;background:var(--warning-bg);border-color:var(--warning-border);color:var(--warning-text)}.warning-block li{line-height:1.72}
.grammar-tool-section{padding:34px 36px;margin-top:18px}.grammar-tool-section .panel-heading h2{font-size:29px}.tool-badge{border-color:var(--line);background:var(--panel-2);color:var(--muted)}
.case-judge-options button{min-height:62px;border-color:var(--line);background:var(--panel-2);color:var(--text-strong)}.case-judge-options button:hover{border-color:var(--line-strong);background:var(--panel-3)}.case-judge-options button.active{outline-color:var(--focus);border-color:var(--primary);background:var(--panel)}.case-judge-result{border-color:color-mix(in srgb,var(--case-color) 42%,var(--line));background:linear-gradient(145deg,color-mix(in srgb,var(--case-color) 10%,var(--panel)),var(--panel))}.case-judge-result>span,.case-judge-result h3 small{color:var(--muted)}.case-judge-result p{color:var(--text-strong);line-height:1.55}
.declension-base{padding:15px 17px;border-color:var(--line-strong);background:var(--panel-2)}.declension-card{padding:19px;border-color:color-mix(in srgb,var(--case-color) 38%,var(--line));background:color-mix(in srgb,var(--case-color) 7%,var(--panel-2))}.declension-card p{color:var(--muted);line-height:1.68}.declension-card>strong{color:var(--text-strong)}
.time-grammar-tabs button{min-height:43px;border-color:var(--line);background:var(--panel-2);color:var(--text-strong)}.time-grammar-tabs button:hover{background:var(--panel-3)}.time-grammar-tabs button.active{background:var(--primary);color:var(--primary-contrast)}.time-topic-intro{color:var(--muted);line-height:1.75}
.contrast-lab-grid{gap:14px}.contrast-lab-card{padding:19px;border-color:var(--line);background:var(--panel-2)}.contrast-pair>div{background:var(--panel);border:1px solid color-mix(in srgb,var(--line) 80%,transparent)}.contrast-pair b,.contrast-pair small,.contrast-pair>span{color:var(--muted)}.contrast-pair p{color:var(--text-strong);line-height:1.6}

html[data-theme="dark"] .brand-mark{background:linear-gradient(145deg,#7696ff,#a17cff)}
html[data-theme="dark"] .badge[data-case="biernik"],html[data-theme="dark"] .badge[data-case="dopelniacz"],html[data-theme="dark"] .badge[data-case="narzednik"],html[data-theme="dark"] .badge[data-case="miejscownik"]{color:#08111f}
html[data-theme="dark"] .secondary-btn,html[data-theme="dark"] .icon-btn{box-shadow:none}
html[data-theme="dark"] .segmented button.active{box-shadow:0 3px 12px rgba(0,0,0,.28)}
html[data-theme="dark"] .question-card,html[data-theme="dark"] .stats-strip article{box-shadow:0 8px 26px rgba(0,0,0,.18)}
html[data-theme="dark"] .grammar-table tbody tr:nth-child(even){background:#172132}
html[data-theme="dark"] .grammar-table tbody tr:hover{background:#202d42}

@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr}.intro-panel{padding:34px}.setup-grid{gap:12px}.grammar-hero,.grammar-lesson{padding:32px}.grammar-tool-section{padding:30px}.appearance-setting{grid-template-columns:1fr}
}
@media(max-width:640px){
  body{font-size:15.5px;line-height:1.65;background:var(--bg)}
  .app-header{min-height:62px;padding:9px 12px}.brand-mark{width:40px;height:40px}.brand h1{font-size:16px}.icon-btn{width:40px;height:40px}
  .app-shell{padding:16px 10px calc(90px + var(--safe-bottom))}.tabs{border-radius:14px;box-shadow:0 10px 32px rgba(11,17,28,.18)}
  .intro-panel,.setup-panel,.practice-panel,.result-panel{padding:22px}.intro-panel h2{font-size:29px;line-height:1.18}.intro-panel p{font-size:15px;line-height:1.7}.quick-actions{display:grid;grid-template-columns:1fr;margin-top:22px}.quick-actions button{width:100%}
  .stats-strip{gap:8px}.stats-strip article{min-height:108px;padding:15px}.stats-strip strong{font-size:27px}
  .setup-grid{gap:10px}.setup-grid fieldset{padding:14px}.case-option{min-height:65px}.setup-footer{margin-top:22px}
  .session-toolbar{top:62px}.question-card{border-radius:16px}.stream-list .question-card{padding:20px}.prompt{font-size:21px;line-height:1.58}.hint-box{padding:13px}.choice-btn{min-height:52px}.feedback{padding:17px}
  .grammar-hero,.grammar-lesson,.grammar-tool-section{padding:22px}.grammar-hero h2{font-size:29px;line-height:1.2}.grammar-hero p,.lesson-header p{font-size:15px;line-height:1.72}.grammar-case-tabs{top:62px}.lesson-header{padding-bottom:22px}.lesson-header h2{font-size:29px}.lesson-block{margin-top:25px}.lesson-block h3{font-size:19px}.usage-grid article{padding:16px}.grammar-table{font-size:13.5px}.grammar-table th,.grammar-table td{padding:12px}.grammar-tool-section .panel-heading h2{font-size:25px}.case-judge-result p{font-size:18px}.declension-card{padding:17px}.contrast-lab-card{padding:16px}
  .appearance-setting{padding:14px;gap:12px}.theme-mode-control button{font-size:13px;padding-inline:5px}
}
@media(prefers-contrast:more){
  :root{--line:#9daac0;--line-strong:#75859e;--muted:#3d4b62}
  html[data-theme="dark"]{--line:#5c6e87;--line-strong:#7d8da3;--muted:#c9d2df}
  .panel,.question-card,.setup-grid fieldset{border-width:2px}
}

/* Small layout corrections after multi-viewport review */
#resetFilters{white-space:nowrap;flex:0 0 auto}
@media(max-width:640px){
  .setup-panel .panel-heading{align-items:flex-start;gap:10px}
  #resetFilters{min-height:36px;padding:5px 2px;font-size:13px}
}

/* V5 grammar course: self-contained curriculum and long-form reading layout */
.grammar-view{--reading-width:1120px}
.grammar-hero{align-items:flex-end}
.grammar-hero>div:first-child{max-width:880px}
.grammar-hero-actions{max-width:330px;justify-content:flex-end}
.grammar-overview{padding:36px 40px;margin-bottom:18px;overflow:hidden}
.overview-header{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,.7fr);align-items:end;gap:34px;padding-bottom:28px;border-bottom:1px solid var(--line)}
.overview-header h2{margin:7px 0 10px;color:var(--text-strong);font-size:clamp(27px,3.4vw,38px);line-height:1.18;letter-spacing:-.03em}
.overview-header p{max-width:820px;margin:0;color:var(--muted);font-size:15.5px;line-height:1.8}
.overview-route{display:flex;flex-direction:column;gap:7px;padding:17px 18px;border:1px solid var(--line);border-radius:15px;background:var(--panel-2)}
.overview-route b{color:var(--text-strong);font-size:13px}.overview-route span{color:var(--muted);font-size:13px;line-height:1.65}
.overview-case-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:24px}
.overview-case-card{--case-color:var(--b);display:flex;flex-direction:column;align-items:flex-start;min-height:218px;padding:19px;border:1px solid color-mix(in srgb,var(--case-color) 34%,var(--line));border-radius:16px;background:linear-gradient(155deg,color-mix(in srgb,var(--case-color) 8%,var(--panel-2)),var(--panel));color:var(--text);text-align:left;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}
.overview-case-card.biernik{--case-color:var(--b)}.overview-case-card.dopelniacz{--case-color:var(--d)}.overview-case-card.narzednik{--case-color:var(--n)}.overview-case-card.miejscownik{--case-color:var(--m)}
.overview-case-card:hover{transform:translateY(-2px);border-color:var(--case-color);box-shadow:var(--shadow-raised)}
.overview-case-card>span{display:inline-flex;padding:4px 8px;border-radius:99px;background:color-mix(in srgb,var(--case-color) 12%,var(--panel));color:var(--case-color);font-size:11px;font-weight:900}
.overview-case-card h3{margin:13px 0 7px;color:var(--text-strong);font-size:18px;line-height:1.25}.overview-case-card p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.65}.overview-case-card em{margin-top:12px;color:var(--text-strong);font-size:12.5px;line-height:1.55;font-style:normal}.overview-case-card small{margin-top:auto;padding-top:16px;color:var(--case-color);font-weight:850}
.foundation-section{margin-top:30px}.foundation-section>h3{margin:0 0 14px;color:var(--text-strong);font-size:21px}
.foundation-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.foundation-grid article{display:grid;grid-template-columns:42px 1fr;gap:13px;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)}.foundation-grid article>span{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--primary);color:var(--primary-contrast);font-weight:900;font-size:12px}.foundation-grid h4{margin:0 0 4px;color:var(--text-strong);font-size:15px}.foundation-grid p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.66}
.grammar-terms{margin-top:18px;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)}.grammar-terms summary{padding:15px 17px;color:var(--text-strong);font-weight:850;cursor:pointer}.grammar-terms>div{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:0 15px 15px}.grammar-terms article{padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}.grammar-terms b{color:var(--text-strong);font-size:13.5px}.grammar-terms p{margin:4px 0 0;color:var(--muted);font-size:13px;line-height:1.65}

.grammar-lesson{max-width:var(--reading-width);margin-inline:auto}
.lesson-header{display:flex;justify-content:space-between;align-items:flex-start}
.lesson-summary-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:12px;margin-top:24px}
.core-rule-card,.objective-card{padding:19px 20px;border:1px solid var(--line);border-radius:15px;background:var(--panel-2)}
.core-rule-card{border-left:4px solid var(--case-color);background:linear-gradient(145deg,color-mix(in srgb,var(--case-color) 8%,var(--panel-2)),var(--panel-2))}
.core-rule-card>span,.objective-card>span{display:block;margin-bottom:7px;color:var(--case-color);font-size:11px;font-weight:900;letter-spacing:.09em;text-transform:uppercase}.core-rule-card p{margin:0;color:var(--text-strong);font-size:15px;line-height:1.75}.objective-card ul{display:grid;grid-template-columns:1fr 1fr;gap:7px 18px;margin:0;padding-left:18px}.objective-card li{color:var(--muted);font-size:13px;line-height:1.55}
.lesson-checklist{display:grid;grid-template-columns:minmax(180px,.45fr) minmax(0,1.55fr);gap:25px;align-items:start;margin-top:30px;padding:22px 24px;border:1px solid color-mix(in srgb,var(--case-color) 34%,var(--line));border-radius:16px;background:color-mix(in srgb,var(--case-color) 6%,var(--panel-2))}.lesson-checklist h3{margin:5px 0 0;color:var(--text-strong);font-size:20px}.lesson-checklist ol{display:grid;grid-template-columns:1fr 1fr;gap:9px 24px;margin:0;padding-left:22px}.lesson-checklist li{color:var(--text);font-size:13.5px;line-height:1.65}
.judge-reason{display:flex;flex-direction:column;gap:4px;margin:14px 0 8px;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel-2)}.judge-reason b{color:var(--text-strong);font-size:12px}.judge-reason span{color:var(--muted);font-size:13px;line-height:1.6}
.tool-footnote{margin:14px 0 0;padding:12px 14px;border-left:3px solid var(--line-strong);background:var(--panel-2);color:var(--muted);font-size:12.5px;line-height:1.7}

/* Tables remain compact on larger screens and turn into readable records on phones. */
.grammar-table td{min-width:120px}
.grammar-table td:last-child{min-width:190px}

@media(max-width:1100px){
  .overview-case-grid{grid-template-columns:1fr 1fr}.overview-case-card{min-height:190px}
  .lesson-summary-grid{grid-template-columns:1fr}.objective-card ul{grid-template-columns:1fr 1fr}
}
@media(max-width:820px){
  .grammar-hero{align-items:flex-start}.grammar-hero-actions{max-width:none;justify-content:flex-start}
  .grammar-overview{padding:28px}.overview-header{grid-template-columns:1fr;gap:18px}.foundation-grid{grid-template-columns:1fr}.grammar-terms>div{grid-template-columns:1fr}
  .lesson-checklist{grid-template-columns:1fr;gap:14px}.lesson-checklist ol{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .grammar-hero-actions{display:grid;grid-template-columns:1fr;width:100%}
  .grammar-overview{padding:21px 18px}.overview-header{padding-bottom:20px}.overview-header h2{font-size:27px}.overview-header p{font-size:14.5px;line-height:1.75}.overview-route{padding:14px}
  .overview-case-grid{grid-template-columns:1fr;gap:9px;margin-top:18px}.overview-case-card{min-height:0;padding:16px}.overview-case-card h3{font-size:17px}.overview-case-card small{padding-top:12px}
  .foundation-section{margin-top:24px}.foundation-grid article{grid-template-columns:38px 1fr;padding:14px}.foundation-grid article>span{width:36px;height:36px}.grammar-terms>div{padding:0 10px 10px}
  .lesson-summary-grid{margin-top:18px}.core-rule-card,.objective-card{padding:16px}.objective-card ul{grid-template-columns:1fr;gap:6px}
  .lesson-checklist{padding:18px}.lesson-checklist ol{grid-template-columns:1fr;gap:7px}
  .grammar-table-wrap{overflow:visible;border:0;background:transparent;margin-inline:0}
  .grammar-table{display:block;width:100%;min-width:0!important;font-size:13.5px}
  .grammar-table thead{display:none}
  .grammar-table tbody{display:grid;gap:10px}
  .grammar-table tr{display:block;padding:6px 12px;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)!important;box-shadow:none}
  .grammar-table td{display:grid;grid-template-columns:minmax(90px,32%) minmax(0,1fr);gap:10px;align-items:start;min-width:0!important;padding:10px 0;border-bottom:1px solid var(--line);white-space:normal!important;overflow-wrap:anywhere}
  .grammar-table td:last-child{border-bottom:0}
  .grammar-table td::before{content:attr(data-label);color:var(--subtle);font-size:10px;font-weight:900;letter-spacing:.04em;text-transform:uppercase;line-height:1.45}
  .grammar-table td:first-child{color:var(--text-strong);font-weight:850}
  .grammar-table td:first-child::before{color:var(--case-color,var(--primary))}
  .pronoun-strip,.grammar-note{margin-top:12px}
}


/* V6 grammar center: task-based information architecture and morphology-first study */
.grammar-view{--grammar-reading:1160px}
.grammar-hub-hero{display:flex;justify-content:space-between;align-items:flex-end;gap:34px;padding:34px 38px;margin-bottom:16px;background:linear-gradient(135deg,color-mix(in srgb,var(--primary) 8%,var(--panel)),var(--panel))}
.grammar-hub-hero>div:first-child{max-width:880px}.grammar-hub-hero h2{margin:8px 0 12px;color:var(--text-strong);font-size:clamp(28px,4vw,44px);line-height:1.12;letter-spacing:-.035em}.grammar-hub-hero p{margin:0;color:var(--muted);font-size:15.5px;line-height:1.82}.grammar-hub-actions{display:flex;flex-direction:column;gap:9px;min-width:230px}
.grammar-hub-nav{position:sticky;top:77px;z-index:25;display:grid;grid-template-columns:repeat(6,1fr);gap:6px;padding:7px;margin-bottom:12px;background:color-mix(in srgb,var(--panel) 94%,transparent);backdrop-filter:blur(16px)}
.grammar-hub-nav button{display:grid;grid-template-columns:30px 1fr;grid-template-rows:auto auto;column-gap:9px;align-items:center;border:0;border-radius:12px;padding:10px 11px;background:transparent;color:var(--muted);text-align:left}.grammar-hub-nav button>span{grid-row:1/3;display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:var(--panel-2);font-size:10px;font-weight:900}.grammar-hub-nav button b{font-size:13px;color:inherit}.grammar-hub-nav button small{font-size:10px;color:var(--subtle)}.grammar-hub-nav button.active{background:var(--primary);color:var(--primary-contrast)}.grammar-hub-nav button.active>span{background:color-mix(in srgb,var(--primary-contrast) 18%,transparent)}.grammar-hub-nav button.active small{color:color-mix(in srgb,var(--primary-contrast) 78%,transparent)}
.grammar-breadcrumb{display:flex;align-items:center;gap:8px;min-height:40px;padding:6px 4px 10px;color:var(--muted);font-size:12px;scroll-margin-top:155px}.grammar-breadcrumb b{color:var(--subtle)}.grammar-breadcrumb strong{color:var(--text-strong)}.grammar-breadcrumb small{margin-left:auto;color:var(--subtle)}
.grammar-module{max-width:var(--grammar-reading);margin:0 auto}.module-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:30px 32px;margin-bottom:14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}.module-heading>div{max-width:820px}.module-heading h2{margin:6px 0 9px;color:var(--text-strong);font-size:clamp(27px,3.6vw,38px);line-height:1.18;letter-spacing:-.025em}.module-heading p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.75}
.route-principles{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}.route-principles article{display:flex;flex-direction:column;gap:5px;padding:17px;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)}.route-principles b{color:var(--text-strong)}.route-principles span{color:var(--muted);font-size:12.5px;line-height:1.6}.route-list{display:grid;gap:9px}.route-card{display:grid;grid-template-columns:54px minmax(0,1fr) auto;align-items:center;gap:16px;padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:var(--panel);box-shadow:var(--shadow)}.route-number{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:var(--panel-3);color:var(--primary);font-weight:900}.route-copy>div{display:flex;align-items:center;gap:10px}.route-copy em{padding:3px 8px;border-radius:99px;background:var(--panel-3);color:var(--muted);font-size:10px;font-style:normal;font-weight:850}.route-copy h3{margin:0;color:var(--text-strong);font-size:17px}.route-copy p{margin:6px 0;color:var(--muted);font-size:13px}.route-copy code{display:inline-block;color:var(--text);font-family:inherit;font-size:12.5px;font-weight:700}.module-callout{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-top:14px;padding:24px 27px;border:1px solid color-mix(in srgb,var(--primary) 30%,var(--line));border-radius:17px;background:color-mix(in srgb,var(--primary) 6%,var(--panel))}.module-callout h3{margin:5px 0 6px;color:var(--text-strong)}.module-callout p{max-width:820px;margin:0;color:var(--muted);font-size:13.5px}
.case-course-tabs,.mini-case-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}.case-course-tabs button,.mini-case-tabs button{--case-color:var(--b);display:flex;flex-direction:column;align-items:flex-start;padding:13px 15px;border:1px solid var(--line);border-radius:13px;background:var(--panel);color:var(--muted)}.case-course-tabs button.biernik,.mini-case-tabs button.biernik{--case-color:var(--b)}.case-course-tabs button.dopelniacz,.mini-case-tabs button.dopelniacz{--case-color:var(--d)}.case-course-tabs button.narzednik,.mini-case-tabs button.narzednik{--case-color:var(--n)}.case-course-tabs button.miejscownik,.mini-case-tabs button.miejscownik{--case-color:var(--m)}.case-course-tabs button small,.mini-case-tabs button small{font-size:10px}.case-course-tabs button.active,.mini-case-tabs button.active{border-color:var(--case-color);background:color-mix(in srgb,var(--case-color) 9%,var(--panel));color:var(--text-strong);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--case-color) 38%,transparent)}
.case-course{--case-color:var(--b);padding:34px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}.case-course.biernik{--case-color:var(--b)}.case-course.dopelniacz{--case-color:var(--d)}.case-course.narzednik{--case-color:var(--n)}.case-course.miejscownik{--case-color:var(--m)}.case-course-header{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;padding-bottom:24px;border-bottom:1px solid var(--line)}.case-course-header>div:first-child{max-width:820px}.case-course-header h2{margin:5px 0 9px;color:var(--text-strong);font-size:36px;line-height:1.12}.case-course-header h2 small{color:var(--muted);font-size:.55em}.case-course-header p{margin:0;color:var(--muted);font-size:15px;line-height:1.78}.case-core-strip{display:grid;grid-template-columns:150px 1fr;gap:18px;margin-top:20px;padding:17px 19px;border-left:4px solid var(--case-color);border-radius:12px;background:color-mix(in srgb,var(--case-color) 7%,var(--panel-2))}.case-core-strip b{color:var(--case-color)}.case-core-strip span{color:var(--text-strong);font-size:14px;line-height:1.7}.section-title{display:flex;align-items:flex-start;gap:12px;margin-bottom:12px}.section-title>span{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:color-mix(in srgb,var(--case-color) 12%,var(--panel-2));color:var(--case-color);font-size:10px;font-weight:900}.section-title h3{margin:0;color:var(--text-strong);font-size:20px}.section-title p{margin:3px 0 0;color:var(--muted);font-size:12.5px}.course-two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}.case-course-footer{display:flex;align-items:center;gap:9px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}.case-course-footer>div{display:flex;flex-direction:column;margin-right:auto}.case-course-footer span{color:var(--muted);font-size:12px}
.morph-view-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}.morph-view-tabs button{display:flex;flex-direction:column;align-items:flex-start;padding:14px 15px;border:1px solid var(--line);border-radius:14px;background:var(--panel);color:var(--muted)}.morph-view-tabs button b{font-size:14px}.morph-view-tabs button small{font-size:10px}.morph-view-tabs button.active{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary)}.morph-view-tabs button.active small{color:color-mix(in srgb,var(--primary-contrast) 78%,transparent)}
.quick-matrix,.pattern-family,.token-breakdown,.all-cases-strip,.reverse-stage,.reverse-analysis-grid,.morph-result-grid{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}.quick-matrix{padding:26px}.quick-matrix>header,.pattern-family>header,.token-breakdown>header,.all-cases-strip>header{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}.quick-matrix h3,.pattern-family h3,.token-breakdown h3{margin:5px 0;color:var(--text-strong);font-size:23px}.quick-case-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.quick-case-card{--case-color:var(--b);padding:18px;border:1px solid color-mix(in srgb,var(--case-color) 35%,var(--line));border-radius:15px;background:linear-gradient(155deg,color-mix(in srgb,var(--case-color) 7%,var(--panel-2)),var(--panel))}.quick-case-card.biernik{--case-color:var(--b)}.quick-case-card.dopelniacz{--case-color:var(--d)}.quick-case-card.narzednik{--case-color:var(--n)}.quick-case-card.miejscownik{--case-color:var(--m)}.quick-case-card header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px}.quick-case-card header div{display:flex;flex-direction:column}.quick-case-card header b{color:var(--case-color);font-size:18px}.quick-case-card header small{color:var(--muted)}.quick-case-card header button{border:0;background:transparent;color:var(--case-color);font-weight:800}.quick-rule{display:grid;grid-template-columns:minmax(105px,.8fr) minmax(95px,.7fr) 1.1fr;gap:8px;padding:9px 0;border-top:1px solid var(--line);font-size:12px}.quick-rule span{color:var(--muted)}.quick-rule b{color:var(--text-strong)}.quick-rule em{color:var(--text);font-style:normal}.quick-case-card footer{margin-top:8px;color:var(--muted);font-size:11px}
.morph-controls{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:10px;padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--panel);box-shadow:var(--shadow)}.morph-controls label,.reverse-controls label{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:11px;font-weight:850}.morph-stage{--case-color:var(--b);position:relative;margin-top:12px;padding:26px;border:1px solid color-mix(in srgb,var(--case-color) 38%,var(--line));border-radius:18px;background:linear-gradient(145deg,color-mix(in srgb,var(--case-color) 9%,var(--panel)),var(--panel));box-shadow:var(--shadow)}.morph-stage.biernik{--case-color:var(--b)}.morph-stage.dopelniacz{--case-color:var(--d)}.morph-stage.narzednik{--case-color:var(--n)}.morph-stage.miejscownik{--case-color:var(--m)}.morph-stage-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.morph-stage-meta b{color:var(--case-color)}.morph-hero-phrase{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;margin:24px 0}.morph-hero-phrase>div{display:flex;flex-direction:column;gap:5px}.morph-hero-phrase small{color:var(--muted)}.morph-hero-phrase strong{color:var(--text-strong);font-size:clamp(24px,4vw,38px);line-height:1.25;overflow-wrap:anywhere}.morph-hero-phrase>div:last-child{text-align:right}.morph-arrow{color:var(--case-color);font-size:30px;font-weight:900}.reveal-cover{width:100%;display:flex;justify-content:space-between;align-items:center;border:1px dashed color-mix(in srgb,var(--case-color) 55%,var(--line));border-radius:12px;padding:10px 13px;background:var(--panel-2);color:var(--muted)}.reveal-cover b{color:var(--case-color);font-size:11px}.morph-stage.answer-hidden .target-phrase{filter:blur(12px);user-select:none}.morph-stage.answer-hidden .morph-hero-phrase>div:last-child{position:relative}.morph-stage.answer-hidden .morph-hero-phrase>div:last-child:after{content:'点击下方按钮显示答案';position:absolute;inset:0;display:grid;place-items:center;color:var(--case-color);font-weight:850;font-size:13px}
.token-breakdown{margin-top:12px;padding:24px}.token-breakdown header p{max-width:420px;margin:0;color:var(--muted);font-size:12.5px;line-height:1.65}.token-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.token-grid article{padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)}.token-grid article>span{color:var(--muted);font-size:10px;font-weight:900}.token-grid article>div{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;margin:10px 0}.token-grid b{color:var(--muted);font-size:18px}.token-grid i{color:var(--primary);font-style:normal}.token-grid strong{color:var(--text-strong);font-size:19px;text-align:right}.token-grid p{margin:0;color:var(--muted);font-size:11.5px;line-height:1.55}.morph-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:12px;overflow:hidden}.morph-result-grid article{padding:20px}.morph-result-grid article+article{border-left:1px solid var(--line)}.morph-result-grid span{color:var(--muted);font-size:10px;font-weight:900}.morph-result-grid h3{margin:7px 0;color:var(--text-strong);font-size:17px;line-height:1.5}.morph-result-grid p{margin:0;color:var(--muted);font-size:12px}.all-cases-strip{margin-top:12px;padding:20px}.all-cases-strip header span{font-weight:850;color:var(--text-strong)}.all-cases-strip header small{color:var(--muted)}.all-cases-strip>div{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:13px}.all-cases-strip button{--case-color:var(--b);display:flex;flex-direction:column;gap:4px;align-items:flex-start;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--panel-2);color:var(--text);text-align:left;overflow:hidden}.all-cases-strip button.biernik{--case-color:var(--b)}.all-cases-strip button.dopelniacz{--case-color:var(--d)}.all-cases-strip button.narzednik{--case-color:var(--n)}.all-cases-strip button.miejscownik{--case-color:var(--m)}.all-cases-strip button.active{border-color:var(--case-color);background:color-mix(in srgb,var(--case-color) 8%,var(--panel))}.all-cases-strip small{color:var(--case-color)}.all-cases-strip b{max-width:100%;overflow-wrap:anywhere}
.pattern-family{--case-color:var(--b);padding:24px}.pattern-family.biernik{--case-color:var(--b)}.pattern-family.dopelniacz{--case-color:var(--d)}.pattern-family.narzednik{--case-color:var(--n)}.pattern-family.miejscownik{--case-color:var(--m)}.pattern-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:17px}.pattern-grid article{position:relative;padding:17px;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)}.pattern-grid article>span{position:absolute;right:12px;top:11px;color:var(--line-strong);font-size:11px;font-weight:900}.pattern-grid h4{margin:0 0 7px;color:var(--text-strong)}.pattern-grid b{display:block;color:var(--case-color);font-size:13px}.pattern-grid p{margin:7px 0;color:var(--text);font-size:12.5px}.pattern-grid em{color:var(--muted);font-size:11.5px;font-style:normal}.pattern-warning,.ambiguity-note{display:flex;gap:12px;margin-top:14px;padding:14px 16px;border-radius:13px;background:var(--warning-bg);border:1px solid var(--warning-border);color:var(--warning-text)}.pattern-warning span,.ambiguity-note span{font-size:12.5px;line-height:1.6}
.reverse-controls{display:flex;align-items:flex-end;gap:10px;padding:17px;border:1px solid var(--line);border-radius:15px;background:var(--panel)}.reverse-controls label{flex:1}.reverse-stage{display:flex;justify-content:space-between;align-items:center;margin-top:12px;padding:24px}.reverse-stage h3{margin:5px 0;color:var(--text-strong);font-size:38px}.reverse-stage p{margin:0;color:var(--muted);font-size:13px}.reverse-stage>strong{font-size:54px;color:var(--primary)}.reverse-analysis-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px;padding:14px}.reverse-analysis-grid article{--case-color:var(--b);padding:17px;border:1px solid color-mix(in srgb,var(--case-color) 35%,var(--line));border-radius:14px;background:var(--panel-2)}.reverse-analysis-grid article.biernik{--case-color:var(--b)}.reverse-analysis-grid article.dopelniacz{--case-color:var(--d)}.reverse-analysis-grid article.narzednik{--case-color:var(--n)}.reverse-analysis-grid article.miejscownik{--case-color:var(--m)}.reverse-analysis-grid header{display:flex;justify-content:space-between;color:var(--case-color)}.reverse-analysis-grid h4{margin:10px 0 4px;color:var(--text-strong)}.reverse-analysis-grid p{margin:0;color:var(--text)}.reverse-analysis-grid em{display:block;margin:9px 0;color:var(--muted);font-size:11.5px;font-style:normal}
.filter-chips{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}.filter-chips button{padding:8px 12px;border:1px solid var(--line);border-radius:99px;background:var(--panel);color:var(--muted);font-weight:800}.filter-chips button.active{background:var(--primary);border-color:var(--primary);color:var(--primary-contrast)}.contrast-method{display:grid;grid-template-columns:150px 1fr;gap:18px;margin-top:14px;padding:21px;border:1px solid var(--line);border-radius:15px;background:var(--panel)}.contrast-method>span{color:var(--primary);font-weight:900}.contrast-method ol{margin:0;padding-left:20px}.contrast-method li{margin-bottom:5px;color:var(--muted);font-size:13px}
.scenario-layout{display:grid;grid-template-columns:260px 1fr;gap:12px}.scenario-list{display:flex;flex-direction:column;gap:7px;padding:8px;border:1px solid var(--line);border-radius:16px;background:var(--panel);box-shadow:var(--shadow);align-self:start;position:sticky;top:165px}.scenario-list button{display:grid;grid-template-columns:34px 1fr;align-items:center;gap:8px;padding:10px;border:0;border-radius:11px;background:transparent;color:var(--muted);text-align:left}.scenario-list button span{font-size:20px}.scenario-list button.active{background:var(--primary);color:var(--primary-contrast)}.scenario-detail{padding:26px;border:1px solid var(--line);border-radius:18px;background:var(--panel);box-shadow:var(--shadow)}.scenario-detail>header{display:flex;align-items:flex-start;gap:14px;padding-bottom:20px;border-bottom:1px solid var(--line)}.scenario-detail>header>span{font-size:42px}.scenario-detail h3{margin:0 0 5px;color:var(--text-strong);font-size:27px}.scenario-detail header p{margin:0;color:var(--muted)}.scenario-case-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}.scenario-case-grid article{--case-color:var(--b);display:flex;flex-direction:column;align-items:flex-start;padding:16px;border:1px solid color-mix(in srgb,var(--case-color) 35%,var(--line));border-radius:14px;background:var(--panel-2)}.scenario-case-grid article.biernik{--case-color:var(--b)}.scenario-case-grid article.dopelniacz{--case-color:var(--d)}.scenario-case-grid article.narzednik{--case-color:var(--n)}.scenario-case-grid article.miejscownik{--case-color:var(--m)}.scenario-case-grid article>span{color:var(--case-color);font-size:11px;font-weight:900}.scenario-case-grid b{margin-top:5px;color:var(--text-strong)}.scenario-case-grid small{color:var(--muted)}.dialogue-card{margin-top:14px;padding:20px;border-radius:15px;background:var(--panel-2);border:1px solid var(--line)}.dialogue-card p{max-width:78%;margin:9px 0;padding:10px 13px;border-radius:12px;background:var(--panel);color:var(--text);box-shadow:0 2px 8px rgba(0,0,0,.04)}.dialogue-card p.reply{margin-left:auto;background:color-mix(in srgb,var(--primary) 10%,var(--panel))}
.tool-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}.tool-tabs button{display:flex;flex-direction:column;align-items:flex-start;padding:13px;border:1px solid var(--line);border-radius:13px;background:var(--panel);color:var(--muted)}.tool-tabs button b{font-size:13px}.tool-tabs button small{font-size:10px}.tool-tabs button.active{background:var(--primary);color:var(--primary-contrast);border-color:var(--primary)}.tool-workspace{padding:24px}.prep-guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.prep-guide-grid article{overflow:hidden;border:1px solid var(--line);border-radius:14px;background:var(--panel-2)}.prep-guide-grid header{padding:12px 15px;background:var(--panel-3)}.prep-guide-grid header strong{font-size:22px;color:var(--text-strong)}.prep-guide-grid article>div{display:grid;grid-template-columns:90px 1fr;gap:8px;padding:12px 15px;border-top:1px solid var(--line)}.prep-guide-grid div b{color:var(--primary);font-size:12px}.prep-guide-grid div span{color:var(--muted);font-size:12px}.prep-guide-grid code{grid-column:1/-1;color:var(--text);font-family:inherit;font-size:12px}
@media(max-width:1000px){.grammar-hub-nav{grid-template-columns:repeat(3,1fr)}.route-principles{grid-template-columns:1fr 1fr}.token-grid,.pattern-grid{grid-template-columns:1fr 1fr}.scenario-layout{grid-template-columns:220px 1fr}.quick-case-grid{grid-template-columns:1fr}.all-cases-strip>div{grid-template-columns:1fr 1fr}}
@media(max-width:820px){.grammar-hub-hero,.module-heading{align-items:flex-start}.grammar-hub-hero{flex-direction:column}.grammar-hub-actions{flex-direction:row;min-width:0}.module-heading{flex-direction:column}.course-two-col{grid-template-columns:1fr}.morph-controls{grid-template-columns:1fr 1fr}.morph-controls label:first-child{grid-column:1/-1}.scenario-layout{grid-template-columns:1fr}.scenario-list{position:static;display:grid;grid-template-columns:repeat(3,1fr)}.scenario-list button{grid-template-columns:28px 1fr}.prep-guide-grid{grid-template-columns:1fr}}
@media(max-width:640px){.grammar-hub-hero{padding:23px 20px}.grammar-hub-hero h2{font-size:30px}.grammar-hub-actions{display:grid;grid-template-columns:1fr;width:100%}.grammar-hub-nav{top:62px;display:flex;overflow-x:auto;scrollbar-width:none;padding:6px}.grammar-hub-nav::-webkit-scrollbar{display:none}.grammar-hub-nav button{min-width:128px;grid-template-columns:24px 1fr;padding:9px}.grammar-hub-nav button>span{width:24px;height:24px}.grammar-breadcrumb{align-items:flex-start;flex-wrap:wrap}.grammar-breadcrumb small{width:100%;margin-left:0}.module-heading{padding:22px 20px}.module-heading h2{font-size:28px}.route-principles{grid-template-columns:1fr 1fr}.route-card{grid-template-columns:42px 1fr;gap:11px;padding:15px}.route-number{width:38px;height:38px}.route-actions{grid-column:2}.route-copy>div{display:block}.route-copy em{display:inline-block;margin-bottom:5px}.module-callout{align-items:flex-start;flex-direction:column}.case-course-tabs,.mini-case-tabs,.morph-view-tabs,.tool-tabs{display:flex;overflow-x:auto;scrollbar-width:none}.case-course-tabs button,.mini-case-tabs button,.morph-view-tabs button,.tool-tabs button{min-width:130px}.case-course{padding:21px 17px}.case-course-header{flex-direction:column}.case-course-header h2{font-size:30px}.case-core-strip{grid-template-columns:1fr;gap:6px}.case-course-footer{align-items:stretch;flex-wrap:wrap}.case-course-footer>div{width:100%}.quick-matrix,.pattern-family,.token-breakdown,.tool-workspace{padding:18px}.quick-rule{grid-template-columns:1fr}.quick-rule b,.quick-rule em{padding-left:8px}.morph-controls{grid-template-columns:1fr}.morph-controls label:first-child{grid-column:auto}.morph-hero-phrase{grid-template-columns:1fr;gap:12px}.morph-arrow{transform:rotate(90deg);justify-self:center}.morph-hero-phrase>div:last-child{text-align:left}.token-breakdown header{flex-direction:column}.token-grid,.pattern-grid,.morph-result-grid,.reverse-analysis-grid{grid-template-columns:1fr}.morph-result-grid article+article{border-left:0;border-top:1px solid var(--line)}.all-cases-strip>div{grid-template-columns:1fr}.reverse-controls{align-items:stretch;flex-direction:column}.reverse-stage{padding:19px}.reverse-stage h3{font-size:32px}.reverse-stage>strong{font-size:42px}.scenario-list{display:flex;overflow-x:auto}.scenario-list button{min-width:150px}.scenario-case-grid{grid-template-columns:1fr}.dialogue-card p{max-width:92%}.tool-tabs button{min-width:150px}.prep-guide-grid article>div{grid-template-columns:1fr}.contrast-method{grid-template-columns:1fr}.grammar-table-wrap{overflow:visible}}

/* V7 responsive hardening
   Final source-order layer: keeps every interactive surface usable from
   compact phones through tablets, laptops and wide desktop screens. */

/* Prevent intrinsic content widths from forcing grid columns wider than the viewport. */
.app-header,.app-shell,.view,.panel,.setup-grid,.setup-grid fieldset,.case-grid,
.segmented,.segmented button,.session-toolbar,.session-toolbar>*,.stream-layout,
.question-card,.question-card>*,.stats-detail-grid,.theme-stat,.grammar-module,
.grammar-module-host,.grammar-hub-nav,.module-heading,.route-card,.case-course,
.quick-matrix,.pattern-family,.token-breakdown,.all-cases-strip,.morph-controls,
.scenario-layout,.scenario-detail,.tool-workspace{min-width:0}

.case-option span,.case-option b,.case-option small,.setup-footer strong,
.session-mode-copy,.session-mode-copy strong,.session-mode-copy small{
  min-width:0;
  overflow-wrap:anywhere;
}
.select-control{max-width:100%}

/* Medium laptops and landscape tablets: two clear columns rather than squeezed thirds. */
@media(max-width:1080px){
  .app-shell{padding-inline:18px}
  .setup-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
  .case-fieldset,.count-fieldset{grid-column:1/-1}
  .case-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .case-option{min-height:76px;align-items:flex-start}
  .case-option em{margin-left:auto}
  .session-toolbar{
    grid-template-columns:minmax(0,1fr) auto;
    gap:12px;
  }
  .session-toolbar-center{grid-column:1/-1;grid-row:2}
  .session-toolbar-actions{grid-column:2;grid-row:1}
}

/* Portrait tablets and large phones: one setup column, two-across case choices. */
@media(max-width:760px){
  .app-shell{padding-inline:12px}
  .hero-grid{grid-template-columns:1fr}
  .setup-panel{padding:24px 20px}
  .setup-grid{grid-template-columns:minmax(0,1fr);gap:11px;margin-top:20px}
  .setup-grid>fieldset,.case-fieldset,.count-fieldset{grid-column:auto!important;width:100%}
  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
  .case-option{min-height:72px;padding:12px;align-items:center}
  .case-option b{font-size:15px;line-height:1.3}
  .case-option small{font-size:11px}
  .case-option em{align-self:center;white-space:nowrap}
  .setup-footer{align-items:stretch;flex-direction:column;gap:14px}
  .primary-btn.large{width:100%;min-width:0}
  .segmented button{min-width:0;overflow:hidden}
  .segmented button b,.segmented button small{max-width:100%;overflow-wrap:anywhere;text-align:center}
  .count-presets{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}
  .count-presets button{min-width:0;width:100%;padding-inline:7px}
  .custom-count-row input{width:min(160px,70vw)}

  .resume-panel{align-items:flex-start;flex-direction:column}
  .resume-actions{width:100%;display:grid;grid-template-columns:1fr auto}

  .session-toolbar{
    top:62px;
    grid-template-columns:minmax(0,1fr);
    gap:10px;
    padding:12px;
    margin-bottom:12px;
  }
  .session-toolbar-left{justify-content:space-between;gap:10px}
  .session-toolbar-left .text-btn{white-space:normal;text-align:left}
  .session-mode-copy{text-align:right;min-width:0}
  .session-toolbar-center{grid-column:1;grid-row:2}
  .session-toolbar-actions{
    position:fixed;
    z-index:46;
    left:12px;
    right:12px;
    bottom:calc(8px + var(--safe-bottom));
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:7px;
    width:auto;
    padding:6px;
    border:1px solid var(--line);
    border-radius:16px;
    background:color-mix(in srgb,var(--panel) 94%,transparent);
    box-shadow:var(--shadow-raised);
    backdrop-filter:blur(16px);
  }
  body.session-active .tabs{display:none!important}
  .practice-shell{padding-bottom:78px}
  .shared-keyboard{bottom:80px}
  .focus-nav{gap:8px}
  .focus-nav button{min-width:0;padding-inline:12px}

  .stats-detail-grid{grid-template-columns:1fr 1fr}
  .theme-stat{grid-template-columns:minmax(0,1fr) auto}
  .theme-stat .mini-progress{grid-column:1/-1}
}

/* Compact phones: protect the header and simplify dense controls. */
@media(max-width:480px){
  body{font-size:15px}
  .app-header{padding:9px 10px;gap:8px}
  .brand{gap:9px;min-width:0;flex:1}
  .brand-mark{width:39px;height:39px;flex:0 0 39px}
  .brand>div:last-child{min-width:0}
  .brand h1{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .brand p{display:none}
  .header-actions{gap:6px;flex:0 0 auto}
  .icon-btn{width:39px;height:39px;border-radius:11px}

  .app-shell{padding:14px 9px calc(90px + var(--safe-bottom))}
  .tabs{left:9px;right:9px;transform:none;width:auto;bottom:calc(8px + var(--safe-bottom))}
  .tab{min-width:0;padding:10px 5px;font-size:14px}
  .panel{border-radius:16px}
  .intro-panel,.setup-panel,.practice-panel,.result-panel,.stats-panel{padding:19px 16px}
  .panel-heading{align-items:flex-start;gap:8px}
  .panel-heading h2{font-size:25px}
  #resetFilters{font-size:12px;white-space:nowrap}

  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .case-option{gap:8px;min-height:78px;padding:11px 9px}
  .case-option input{width:17px;height:17px;flex:0 0 auto}
  .case-option b{font-size:14px}
  .case-option small{font-size:10px;line-height:1.3}
  .case-option em{font-size:10px}
  .setup-grid fieldset{padding:13px}
  .setup-grid legend{margin-bottom:10px}
  .segmented{width:100%}
  .segmented button{padding-inline:5px}
  .segmented button b{font-size:14px}
  .segmented button small{font-size:9px}
  .count-presets{grid-template-columns:repeat(4,minmax(0,1fr))}
  .count-presets button{font-size:13px;padding:8px 4px}

  .stats-strip{grid-template-columns:1fr 1fr}
  .stats-strip article{min-width:0}
  .stats-strip strong{font-size:25px}
  .stats-detail-grid{grid-template-columns:1fr}

  .session-toolbar{margin-inline:0}
  .session-toolbar-left{align-items:flex-start}
  .session-mode-copy strong{font-size:13px}
  .session-mode-copy small{font-size:10px}
  .session-progress-copy{font-size:11px}
  .session-toolbar-actions{left:9px;right:9px}
  .question-card{padding:17px 15px}
  .question-card-header{gap:8px}
  .question-meta{gap:4px}
  .badge{font-size:10px;padding-inline:7px}
  .prompt{font-size:20px;line-height:1.55}
  .hint-box{grid-template-columns:auto minmax(0,1fr);gap:5px 9px}
  .choice-grid{grid-template-columns:1fr}
  .question-actions{display:grid;grid-template-columns:1fr}
  .question-actions button{width:100%}
  .answer-line{align-items:flex-start;flex-direction:column;gap:3px}
  .feedback-title{gap:8px;font-size:16px}
  .feedback dl div{grid-template-columns:1fr}
  .focus-nav{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr)}
  .focus-nav span{font-size:12px}

  .navigator-dialog,.settings-dialog{width:calc(100vw - 12px);padding:16px}
  .settings-dialog form{padding:18px 16px}
  .navigator-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .navigator-shortcuts{grid-template-columns:1fr}
  .appearance-setting{grid-template-columns:1fr}
  .settings-actions{display:grid;grid-template-columns:1fr}
  .settings-actions>*{width:100%;justify-content:center}
  .toggle-row{align-items:flex-start}
}

/* Very narrow legacy / split-screen widths. */
@media(max-width:340px){
  .brand h1{max-width:145px}
  .case-grid{grid-template-columns:1fr}
  .count-presets{grid-template-columns:repeat(3,minmax(0,1fr))}
  .stats-strip{grid-template-columns:1fr}
  .session-toolbar-actions{grid-template-columns:1fr}
  .practice-shell{padding-bottom:126px}
  .shared-keyboard{bottom:128px}
}

/* Landscape phones: use width efficiently without restoring desktop density. */
@media(max-height:520px) and (orientation:landscape) and (max-width:940px){
  .app-header{position:relative}
  .tabs{position:static;transform:none;width:100%;margin-bottom:12px}
  .app-shell{padding-bottom:18px}
  .setup-grid{grid-template-columns:1fr 1fr}
  .case-fieldset,.count-fieldset{grid-column:1/-1!important}
  .case-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .session-toolbar{top:0}
  .session-toolbar-actions{position:static;grid-column:1/-1;grid-row:auto}
  .practice-shell{padding-bottom:0}
  .shared-keyboard{position:static}
}

/* Tablet readability pass: avoid four narrow case cards around 768–900px. */
@media(min-width:761px) and (max-width:900px){
  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .case-option{min-height:72px;align-items:center}
}

@media(max-width:760px){
  .session-toolbar-actions{
    grid-column:auto!important;
    grid-row:auto!important;
    top:auto!important;
    width:auto!important;
  }
}