/*
 * ╔══════════════════════════════════════════════════════════╗
 * ║  kviz.css — Kvíz zkušebních otázek ČNB (ZSU)              ║
 * ║  Rozšíření design systému danielbenes.cz                 ║
 * ║  0. App-lišta (náhrada hlavní navigace na této stránce)   ║
 * ║  1. Hero + atribuce zdroje                                ║
 * ║  2. Krok 1 — nastavení testu (režim, kategorie, filtry)   ║
 * ║  3. Krok 2 — kvíz (otázky, odpovědi, navigace)             ║
 * ║  4. Krok 3 — výsledky (shrnutí, rozbor, grafy)             ║
 * ║  5. Responzivní design                                     ║
 * ╚══════════════════════════════════════════════════════════╝
 */

/* ============================================================
   0. APP-LIŠTA
   Kvíz je oddělený „studijní nástroj" — místo těžké hlavičky
   s hamburger menu má vlastní kompaktní, vždy přítomnou lištu
   (zpět/odejít, název, průběh, přepínač motivu). Position:sticky
   místo fixed — obsah pod ní pak nepotřebuje ruční padding-top.
============================================================ */

.quiz-appbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  flex-direction: column;
  background: color-mix(in srgb, var(--panel-bg) 92%, transparent);
  border-bottom: 1px solid var(--panel-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* Řádek s tlačítky — vlastní řádek odděleně od stavového pruhu níže, takže
   zpět/motiv jsou vždy vystředěné vůči SOBĚ NAVZÁJEM, ne vůči dvouřádkovému
   obsahu jako předtím. */
.quiz-appbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 56px;
  /* clamp místo pevného 1rem — tlačítka nesmí zůstat nalepená hned
     u okraje obrazovky / posuvníku prohlížeče na žádné šířce */
  padding: 0.4rem clamp(1.25rem, 4vw, 2.75rem);
}

.quiz-appbar-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 36px;
  padding: 0 0.9rem 0 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-family: "Montserrat", system-ui, sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  flex-shrink: 0;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.quiz-appbar-back:active { transform: translateY(0) scale(0.96); }
@media (hover: hover) {
  .quiz-appbar-back:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
}
@media (hover: none) {
  .quiz-appbar-back:hover { border-color: var(--accent); color: var(--accent); }
}
.quiz-appbar-back-icon { flex-shrink: 0; }

.quiz-appbar-title {
  flex: 1;
  min-width: 0;
  text-align: center;
  font-family: "Inconsolata", monospace;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Stavový pruh — vlastní plnošířkový řádek POD hlavním řádkem s tlačítky,
   jako status bar; drží se stejného vodorovného odsazení jako .quiz-appbar-row. */
.quiz-appbar-progress {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0 clamp(1.25rem, 4vw, 2.75rem) 0.6rem;
}

.quiz-appbar-progress-track {
  flex: 1;
  height: 5px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 12%, transparent);
  overflow: hidden;
}

.quiz-appbar-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #d90000 0%, #b80000 100%);
  border-radius: 999px;
  transition: width 0.25s ease;
}

.quiz-appbar-progress-text {
  font-family: "Inconsolata", monospace;
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.quiz-appbar-theme {
  height: 36px !important;
  width: 36px !important;
  padding: 0 !important;
  justify-content: center !important;
  flex-shrink: 0;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.quiz-appbar-theme:active { transform: translateY(0) scale(0.94); }
@media (hover: hover) {
  .quiz-appbar-theme:hover { border-color: var(--accent); transform: translateY(-1px) rotate(-8deg); }
}
@media (hover: none) {
  .quiz-appbar-theme:hover { border-color: var(--accent); }
}

/* Proto-banner: mimo krok 1 ho skrývá JS/kviz.js (goToStep), ne CSS —
   viditelnost zůstává řízená stejnou logikou jako zavírací křížek. */
#protoBanner { position: relative; }

@media (max-width: 560px) {
  .quiz-appbar-title { display: none; }
  .quiz-appbar-progress { width: auto; }
}

/* ============================================================
   1. HERO + ATRIBUCE ZDROJE
============================================================ */

.page-hero {
  min-height: 0;
  padding: 2.5rem 0 2rem;
  display: flex;
  align-items: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(217, 0, 0, 0.07) 0%, transparent 65%);
  pointer-events: none;
}

.page-hero-content { width: 100%; }

.page-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.page-hero h1 {
  font-family: "Montserrat", system-ui, sans-serif;
  font-size: clamp(2rem, 4.2vw, 3.6rem);
  font-weight: 800;
  line-height: 1.05;
  margin: 0.5rem 0 1.25rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-hero h1 span { color: var(--accent); }

.page-hero-desc {
  font-size: 1rem;
  color: var(--muted);
  max-width: 680px;
  line-height: 1.8;
  margin: 0 0 1.5rem;
}

.source-attribution {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: center;
  font-family: "Inconsolata", monospace;
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 0.85rem 1.1rem;
  margin: 0 0 1.5rem;
}

.source-attribution a { color: var(--accent); }

.source-attribution strong { color: var(--text); }

.source-attribution-dates {
  flex-basis: 100%;
  font-size: 0.76rem;
  opacity: 0.75;
}

/* ============================================================
   2. KROK 1 — NASTAVENÍ TESTU
============================================================ */

.quiz-section {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.quiz-section:first-of-type { border-top: none; }

.setup-block {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.setup-group { margin-bottom: 1.5rem; }
.setup-group:last-child { margin-bottom: 0; }

.setup-label {
  display: block;
  font-family: "Inconsolata", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 0.6rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.choice-btn {
  font-family: "Montserrat", system-ui, sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease,
    transform 0.15s ease, box-shadow 0.15s ease;
}

.choice-btn:active { transform: translateY(0) scale(0.97); }
@media (hover: hover) {
  .choice-btn:hover { border-color: var(--accent); color: var(--text); transform: translateY(-1px); }
}
@media (hover: none) {
  .choice-btn:hover { border-color: var(--accent); color: var(--text); }
}

.choice-btn.active {
  border-color: var(--accent);
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 16%, transparent) 0%, color-mix(in srgb, var(--accent) 6%, transparent) 100%);
  color: var(--text);
  font-weight: 700;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 18%, transparent);
}

.mode-panel {
  border-top: 1px dashed var(--border);
  padding-top: 1.25rem;
  margin-top: 0.25rem;
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 200px;
  flex: 1;
}

.field label {
  font-size: 0.85rem;
  color: var(--muted);
}

.field input[type="number"],
.field select {
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: "Montserrat", system-ui, sans-serif;
  font-size: 0.92rem;
}

.disabled-note {
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
  margin: 0.5rem 0 0;
}

.start-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.75rem;
  flex-wrap: wrap;
}

#startBtn {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #d90000 0%, #b80000 100%);
  color: #fff;
  border: none;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  font-weight: 700;
  font-family: "Montserrat", system-ui, sans-serif;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(217, 0, 0, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

#startBtn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.16), transparent);
  transition: left 0.5s ease;
}

#startBtn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

#startBtn:not(:disabled):active { transform: translateY(0) scale(0.98); }
@media (hover: hover) {
  #startBtn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(217, 0, 0, 0.35);
  }
  #startBtn:not(:disabled):hover::before { left: 100%; }
}

.start-error {
  color: #d97800;
  font-size: 0.85rem;
}

.load-error {
  background: var(--panel-bg);
  border: 1px solid #d90000;
  border-radius: 12px;
  padding: 1.25rem;
  color: var(--muted);
}

/* ============================================================
   3. KROK 2 — KVÍZ
============================================================ */

.quiz-progress {
  font-family: "Inconsolata", monospace;
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 1rem;
}

/* --- Navigátor otázek — kompaktní vodorovný pruh číslovaných teček nad
   kartou otázky. Nepřekáží spodní liště Předchozí/Další/Odeslat, jen dovolí
   přímo skočit na libovolnou otázku a napoví, co už je zodpovězené. --- */
.question-nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.4rem;
  overflow-x: auto;
  padding: 0.15rem 0.15rem 0.75rem;
  margin: 0 0 1rem;
  scrollbar-width: thin;
}

.question-nav-dot {
  flex-shrink: 0;
  scroll-snap-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-family: "Inconsolata", monospace;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.question-nav-dot:active { transform: scale(0.92); }

@media (hover: hover) {
  .question-nav-dot:hover { border-color: var(--accent); color: var(--text); transform: translateY(-1px); }
}

.question-nav-dot.answered {
  border-color: transparent;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 85%, transparent) 0%, color-mix(in srgb, #b80000 85%, transparent) 100%);
  color: #fff;
}

.question-nav-dot.current {
  border-color: var(--text);
  color: var(--text);
  font-weight: 800;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--text) 15%, transparent);
}

.question-nav-dot.answered.current {
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
}

.question-card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
  animation: questionCardIn 0.3s ease both;
}

@keyframes questionCardIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .question-card { animation: none; }
}

.case-zadani {
  background: rgba(217, 0, 0, 0.05);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 0.9rem 1.1rem;
  margin: 0 0 1.25rem;
}

html[data-theme="light"] .case-zadani { background: rgba(217, 0, 0, 0.04); }

.case-zadani-label {
  font-family: "Inconsolata", monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

.case-zadani-text {
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.7;
  margin: 0;
  text-align: left;
}

.case-zadani-ref {
  font-family: "Inconsolata", monospace;
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0 0 1rem;
  font-style: italic;
}

.question-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 0 0 0.6rem;
}

.question-meta > :first-child {
  font-family: "Inconsolata", monospace;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.q-type-badge {
  font-family: "Inconsolata", monospace;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 10px;
  border-radius: 999px;
}

.q-type-badge.single {
  background: rgba(30, 111, 181, 0.15);
  color: #5ba0e0;
  border: 1px solid rgba(30, 111, 181, 0.3);
}

.q-type-badge.multi {
  background: rgba(217, 120, 0, 0.15);
  color: #e09030;
  border: 1px solid rgba(217, 120, 0, 0.3);
}

html[data-theme="light"] .q-type-badge.single { background: #E6F1FB; color: #0C447C; border-color: #B5D4F4; }
html[data-theme="light"] .q-type-badge.multi { background: #FAEEDA; color: #633806; border-color: #FAC775; }

.question-text {
  font-size: 1.12rem;
  color: var(--text);
  line-height: 1.7;
  margin: 0 0 1.25rem;
  text-align: left;
}

.answers-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.answer-option {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  text-align: left;
}

@media (hover: hover) {
  .answer-option:hover {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 5%, transparent);
    transform: translateX(2px);
  }
}
@media (hover: none) {
  .answer-option:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 5%, transparent); }
}

.answer-option:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
}

.answer-option input { margin-top: 0.2rem; accent-color: var(--accent); flex-shrink: 0; }

.check-answer-btn {
  margin-top: 1rem;
  font-family: "Montserrat", system-ui, sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.6rem 1.3rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.check-answer-btn:active { transform: translateY(0) scale(0.97); }
@media (hover: hover) {
  .check-answer-btn:hover { background: var(--active-bg); transform: translateY(-1px); }
}
@media (hover: none) {
  .check-answer-btn:hover { background: var(--active-bg); }
}

.quiz-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.quiz-nav .nav-btns { display: flex; gap: 0.75rem; }

.quiz-nav button {
  font-family: "Montserrat", system-ui, sans-serif;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.quiz-nav button:active { transform: translateY(0) scale(0.97); }
@media (hover: hover) {
  .quiz-nav button:hover { transform: translateY(-2px); }
}

.quiz-nav .nav-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}

.quiz-nav .nav-secondary:hover { border-color: var(--accent); color: var(--text); }

.quiz-nav .nav-primary {
  background: linear-gradient(135deg, #d90000 0%, #b80000 100%);
  border: none;
  color: #fff;
  box-shadow: 0 3px 10px rgba(217, 0, 0, 0.25);
}

.quiz-nav .nav-primary:hover { box-shadow: 0 6px 16px rgba(217, 0, 0, 0.35); }


/* ============================================================
   4. KROK 3 — VÝSLEDKY
============================================================ */

#stepResults h3 {
  font-family: "Montserrat", system-ui, sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--text);
}

/* --- Grafy výsledků --- */
.result-charts {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: stretch;
  margin: 0 0 1.5rem;
  animation: resultsFadeIn 0.45s ease 0.05s both;
}

#stepResults .tldr-box { animation: resultsFadeIn 0.4s ease both; }

@keyframes resultsFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .result-charts, #stepResults .tldr-box { animation: none; }
}

.result-charts .chart-wrapper { margin: 0; display: flex; flex-direction: column; }
.result-charts .chart-canvas-wrap { position: relative; flex: 1; min-height: 200px; }
.result-charts canvas { max-width: 100%; }

@media (max-width: 720px) {
  .result-charts { grid-template-columns: 1fr; }
}

/* --- Pruhy s prahovou ryskou (ostrá zkouška: znalosti / případovky / celkem) --- */
.result-bars {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1rem 0 0;
}

.result-bar-row-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: "Inconsolata", monospace;
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0 0 0.4rem;
}

.result-bar-row-label strong { color: var(--text); }

.result-bar-track {
  position: relative;
  height: 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 10%, transparent);
  overflow: visible;
}

.result-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #d90000 0%, #b80000 100%);
  transition: width 0.4s ease;
}

.result-bar-fill.pass { background: linear-gradient(90deg, #1a9f78 0%, #147a5c 100%); }

.result-bar-threshold {
  position: absolute;
  top: -3px;
  bottom: -3px;
  width: 2px;
  background: var(--text);
  opacity: 0.55;
}

.result-bar-threshold::after {
  content: attr(data-label);
  position: absolute;
  top: -1.35rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: "Inconsolata", monospace;
  font-size: 0.65rem;
  color: var(--muted);
  white-space: nowrap;
}

.review-card { border-left: 3px solid var(--border); }

.review-answers {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.review-answers li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
  text-align: left;
}

.review-answers li .mark {
  font-weight: 700;
  width: 1.1rem;
  flex-shrink: 0;
}

.review-answers li.answer-correct {
  border-color: rgba(26, 122, 94, 0.4);
  background: rgba(26, 122, 94, 0.08);
  color: var(--text);
}

.review-answers li.answer-correct .mark { color: #1a7a5e; }

.review-answers li.answer-wrong-selected {
  border-color: rgba(217, 0, 0, 0.4);
  background: rgba(217, 0, 0, 0.06);
  color: var(--text);
}

.review-answers li.answer-wrong-selected .mark { color: var(--accent); }

.results-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.results-actions button {
  font-family: "Montserrat", system-ui, sans-serif;
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.results-actions button:active { transform: translateY(0) scale(0.97); }
@media (hover: hover) {
  .results-actions button:hover { transform: translateY(-2px); }
}

#retryBtn {
  background: linear-gradient(135deg, #d90000 0%, #b80000 100%);
  border: none;
  color: #fff;
  box-shadow: 0 3px 10px rgba(217, 0, 0, 0.25);
}

#retryBtn:hover { box-shadow: 0 6px 16px rgba(217, 0, 0, 0.35); }

#newSetupBtn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}

#newSetupBtn:hover { border-color: var(--accent); color: var(--text); }

/* ============================================================
   5. RESPONZIVNÍ DESIGN
============================================================ */

@media (max-width: 640px) {
  .page-hero { padding: 1.75rem 0 1.5rem; }
  .quiz-section { padding: 2rem 0; }
  .setup-block { padding: 1.25rem; }
  .question-card { padding: 1.1rem 1.25rem; }
  .field-row { flex-direction: column; align-items: stretch; }
  .field { min-width: 0; }
  .quiz-nav { flex-direction: column; align-items: stretch; }
  .quiz-nav .nav-btns { justify-content: space-between; }
}