/* Quiz Shared Styles */

.quiz-config {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.config-section {
  margin-bottom: var(--space-xl);
}

.config-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.config-hint {
  font-weight: 400;
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: normal;
  font-size: 13px;
}

/* Toggle Buttons */
.direction-toggle,
.difficulty-toggle {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.toggle-btn {
  padding: 8px 16px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.toggle-btn:hover {
  border-color: var(--text-secondary);
  color: var(--text-secondary);
}

.toggle-btn.active {
  border-color: var(--text);
  color: var(--text);
  background: rgba(0, 0, 0, 0.03);
}

/* Category Chips - grid defined below in .category-chip section */

.category-chip {
  padding: 8px 0;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

@media (max-width: 480px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Flag buttons */
.flag-btn {
  font-size: 18px;
  padding: 8px 20px;
  letter-spacing: 0.05em;
}

/* Collapsible categories */
.category-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text);
}
.category-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  color: var(--text-muted);
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.category-toggle:hover .category-arrow {
  background: rgba(0, 0, 0, 0.04);
  color: var(--text);
}
.category-arrow.open {
  transform: rotate(180deg);
}

.category-chip:hover {
  border-color: var(--cat-color, var(--text-secondary));
  color: var(--cat-color, var(--text));
}

.category-chip.selected {
  color: var(--cat-color, var(--text));
  font-weight: 600;
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-blue);
}

/* Start Button */
.start-btn {
  margin-top: var(--space-lg);
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 14px;
}

/* Quiz Play */
.quiz-play {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.quiz-header {
  margin-bottom: var(--space-xl);
}

.quiz-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-sm);
}

/* Question Card */
.question-card {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  margin-bottom: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.question-word {
  margin-top: var(--space-sm);
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.question-example {
  margin-top: var(--space-md);
  font-style: italic;
  color: var(--text-muted);
  font-size: 15px;
}

/* Conjugation Card */
.conjugation-card .verb-translation {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 4px;
}

.person-badge {
  display: inline-block;
  margin-top: var(--space-md);
  padding: 6px 16px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-blue);
  background: rgba(0, 57, 166, 0.06);
  border-radius: var(--radius);
}

/* Options Grid (Vocab) */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  text-align: left;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s ease;
}

/* no hover effect on options - cleaner UX */

.option-btn:disabled {
  cursor: default;
}

.option-key {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-shrink: 0;
}

.option-btn.correct {
  border-color: var(--correct);
  background: var(--correct-bg);
}
.option-btn.correct .option-key {
  border-color: var(--correct);
  color: var(--correct);
}

.option-btn.wrong {
  border-color: var(--wrong);
  background: var(--wrong-bg);
}
.option-btn.wrong .option-key {
  border-color: var(--wrong);
  color: var(--wrong);
}

.option-btn.dimmed {
  opacity: 0.4;
}

/* Conjugation Input */
.conjugation-input-area {
  margin-top: var(--space-lg);
}

.input-wrapper {
  display: flex;
  gap: 10px;
}

.conjugation-input {
  flex: 1;
  padding: 14px 16px;
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 500;
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s ease;
}

.conjugation-input:focus {
  border-color: var(--accent-blue);
}

.conjugation-input.input-correct {
  border-color: var(--correct);
  background: var(--correct-bg);
}

.conjugation-input.input-wrong {
  border-color: var(--wrong);
  background: var(--wrong-bg);
}

.check-btn {
  padding: 14px 24px;
  white-space: nowrap;
}

/* Result Bar */
.result-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.result-correct {
  font-weight: 600;
  color: var(--correct);
}

.result-wrong {
  font-weight: 500;
  color: var(--wrong);
}

.correction {
  color: var(--correct);
  font-weight: 600;
}

/* Summary */
.quiz-summary {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
}

.summary-score-ring {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-xl);
  border-radius: 50%;
  border: 3px solid var(--border-strong);
}

.summary-pct {
  font-family: var(--heading);
  font-size: 36px;
  font-weight: 800;
  line-height: 1;
  color: var(--text);
}

.summary-label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.summary-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-value {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.stat-label {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

/* Summary Word List */
.summary-words {
  text-align: left;
  margin-bottom: var(--space-xl);
}

.summary-word {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.summary-word:last-child {
  border-bottom: none;
}

.summary-indicator {
  font-weight: 700;
  width: 20px;
  text-align: center;
}

.summary-word.correct .summary-indicator { color: var(--correct); }
.summary-word.wrong .summary-indicator { color: var(--wrong); }

.summary-es {
  font-weight: 600;
  min-width: 120px;
}

.summary-de {
  color: var(--text-secondary);
}

/* Hero */
.hero {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-xl);
  line-height: 1.6;
}

/* Mode Cards */
.mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  max-width: 640px;
  margin: 0 auto;
}

.mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xl) var(--space-lg);
  text-decoration: none;
  color: var(--text);
  text-align: center;
}

.mode-card:hover {
  color: var(--text);
}

.mode-card h3,
.mode-card-title {
  font-size: 18px;
  font-weight: 700;
}

.mode-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Highscore */
.config-highscore {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  margin-bottom: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes correctPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

.question-card {
  animation: fadeIn 0.3s ease-out;
}

.options-grid {
  animation: slideUp 0.3s ease-out;
}

.option-btn.correct {
  animation: correctPulse 0.3s ease-out;
}

.result-bar {
  animation: fadeIn 0.2s ease-out;
}

.quiz-summary {
  animation: fadeIn 0.4s ease-out;
}

.summary-score-ring {
  animation: fadeIn 0.5s ease-out;
}

/* New High Score */
.new-highscore {
  display: inline-block;
  padding: 4px 12px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--streak);
  background: rgba(217, 119, 6, 0.08);
  border-radius: var(--radius);
  margin-top: var(--space-sm);
}

/* ── Speak Button ── */
.speak-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
  margin-top: var(--space-xs);
}
.speak-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(0, 57, 166, 0.06);
}

/* ── Sentence Miner ── */
.miner-input, .miner-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.miner-textarea {
  width: 100%;
  min-height: 150px;
  padding: var(--space-md);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text);
  resize: vertical;
  outline: none;
}
.miner-textarea:focus { border-color: var(--accent-blue); }

.miner-text {
  padding: var(--space-lg);
  line-height: 2.2;
  font-size: 17px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.miner-token {
  display: inline;
  padding: 2px 4px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s ease;
}
.miner-token:hover { background: rgba(0, 57, 166, 0.08); }
.miner-token.known { color: var(--correct); }
.miner-token.selected { background: rgba(0, 57, 166, 0.12); font-weight: 600; }

.word-detail {
  margin-top: var(--space-md);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  animation: fadeIn 0.2s ease-out;
}
.word-detail-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.word-detail-header h3 { font-size: 24px; font-weight: 800; }
.word-detail-actions { margin-left: auto; }
.word-phonetic { font-family: var(--mono); font-size: 14px; color: var(--text-muted); }
.word-meanings { margin-top: var(--space-md); }
.word-meaning { margin-bottom: var(--space-md); }
.word-pos {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-blue);
}
.word-def { font-size: 15px; color: var(--text-secondary); margin: 4px 0; }
.word-example { color: var(--text-muted); font-style: italic; }
.word-not-found { color: var(--text-muted); font-size: 14px; margin-top: var(--space-sm); }
.word-synonyms { font-size: 14px; color: var(--text-muted); margin-top: var(--space-sm); }
.word-synonyms .word-pos { margin-right: 4px; }
.word-etymology { font-size: 13px; color: var(--text-label); font-style: italic; margin-top: var(--space-sm); }

.add-word-form {
  display: flex;
  gap: 10px;
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}
.add-word-input {
  flex: 1;
  padding: 10px 14px;
  font-family: var(--sans);
  font-size: 15px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text);
  outline: none;
}
.add-word-input:focus { border-color: var(--accent-blue); }

.miner-added {
  margin-top: var(--space-xl);
}
.miner-added-summary {
  margin-top: var(--space-md);
  text-align: center;
}
.miner-actions {
  margin-top: var(--space-xl);
  text-align: center;
}

/* ── Install Banner ── */
.install-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: var(--space-md);
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
  animation: slideUp 0.3s ease-out;
}
.install-content {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}
.install-icon {
  flex-shrink: 0;
  border-radius: 8px;
  margin-top: 2px;
}
.install-text {
  flex: 1;
}
.install-text strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
}
.install-text p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}
.install-highlight {
  font-weight: 600;
  color: var(--text);
}
.install-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  border-radius: 50%;
  transition: background 0.2s ease;
}
.install-close:hover {
  background: rgba(0, 0, 0, 0.05);
}

/* Cloze / Lückentext */
.cloze-sentence {
  font-size: 20px;
  line-height: 1.7;
  color: var(--text);
  text-align: center;
}
.cloze-blank {
  display: inline-block;
  min-width: 80px;
  padding: 2px 8px;
  margin: 0 4px;
  border-bottom: 3px solid var(--accent);
  font-weight: 700;
  color: var(--accent);
  text-align: center;
}
.cloze-blank.filled {
  border-bottom-color: transparent;
}
.cloze-feedback {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}
.cloze-translation {
  font-size: 14px;
  color: var(--text-muted);
  font-style: italic;
}

/* Reading text */
.reading-text {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
  text-align: justify;
  hyphens: auto;
  -webkit-hyphens: auto;
}
.reading-card {
  text-align: left;
}

/* Grammar */
.grammar-topics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  max-width: 600px;
  margin: 0 auto;
}
.grammar-topic-card {
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-md);
}
.grammar-topic-header {
  display: flex;
  align-items: center;
  gap: 8px;
}
.grammar-level {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: var(--radius);
}
.grammar-level[data-level="A1"] { background: var(--level-a1-bg); color: var(--level-a1); }
.grammar-level[data-level="A2"] { background: var(--level-a2-bg); color: var(--level-a2); }
.grammar-level[data-level="B1"] { background: var(--level-b1-bg); color: var(--level-b1); }
.grammar-level-group {
  margin-bottom: var(--space-xl);
}
.grammar-group-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}
.grammar-explanation {
  text-align: left;
}
.grammar-explanation p {
  margin-bottom: 4px;
  font-size: 15px;
}
.grammar-lesson {
  text-align: left;
}

@media (max-width: 600px) {
  .grammar-topics { grid-template-columns: 1fr; }
}

/* 4-column mode grid */
.mode-cards.four-cols {
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 1fr;
  max-width: 800px;
}
.four-cols .mode-card {
  padding: var(--space-lg) var(--space-md);
}
.four-cols .mode-card-title {
  font-size: 15px;
  text-wrap: nowrap;
}
.four-cols .mode-card p {
  font-size: 12px;
  text-wrap: balance;
}

/* ── Dashboard ── */
.dashboard {
  max-width: 640px;
  margin: 0 auto var(--space-xl);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  animation: fadeIn 0.3s ease-out;
}

.dashboard-streak {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.streak-flame {
  font-size: 32px;
  line-height: 1;
}

.streak-info {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.streak-count {
  font-family: var(--heading);
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
}

.streak-text {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.dashboard-xp {
  margin-bottom: var(--space-md);
}

.xp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.xp-today {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
}

.xp-done {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--correct);
}

.xp-bar {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.xp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--chile-blue), var(--chile-red));
  border-radius: 4px;
  transition: width 0.5s ease;
}

.dashboard-total {
  display: flex;
  justify-content: space-between;
}

/* ── SRS Boxes ── */
.srs-overview {
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.srs-boxes {
  display: flex;
  gap: 6px;
}

.srs-box {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-sm) 0;
  border-radius: var(--radius);
}

.srs-box[data-state="new"] { background: rgba(213, 43, 30, 0.08); }
.srs-box[data-state="learning"] { background: rgba(217, 119, 6, 0.08); }
.srs-box[data-state="review"] { background: rgba(22, 163, 74, 0.06); }
.srs-box[data-state="relearning"] { background: rgba(0, 57, 166, 0.06); }

.srs-due-row {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-sm);
  font-size: 13px;
}

.srs-due-count {
  color: var(--accent);
  font-weight: 600;
}

.srs-box-count {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.srs-box-label {
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.srs-unseen {
  margin-top: var(--space-sm);
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

/* ── Flashcard ── */
.flashcard {
  perspective: 1000px;
  cursor: pointer;
  margin-bottom: var(--space-lg);
}

.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 220px;
  transition: transform 0.5s ease;
  transform-style: preserve-3d;
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  backface-visibility: hidden;
}

.flashcard-back {
  transform: rotateY(180deg);
}

.flashcard-word {
  font-size: clamp(24px, 5vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-top: var(--space-sm);
}

.flashcard-hint {
  margin-top: var(--space-md);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-label);
}

.flashcard-actions {
  display: flex;
  gap: var(--space-md);
  animation: slideUp 0.2s ease-out;
}

.flashcard-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: var(--space-md);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  border: 2px solid;
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.flashcard-btn-icon {
  font-size: 20px;
  font-weight: 800;
}

.wrong-btn {
  border-color: var(--wrong);
  color: var(--wrong);
}
.wrong-btn:hover {
  background: var(--wrong-bg);
}

.correct-btn {
  border-color: var(--correct);
  color: var(--correct);
}
.correct-btn:hover {
  background: var(--correct-bg);
}

/* Responsive */
@media (max-width: 768px) {
  .mode-cards.four-cols {
    grid-template-columns: repeat(2, 1fr);
  }
  .grammar-topics {
    grid-template-columns: 1fr;
  }
  .flashcard-actions {
    flex-direction: row;
  }
  .cloze-sentence {
    font-size: 18px;
  }
}

@media (max-width: 480px) {
  .options-grid {
    grid-template-columns: 1fr;
  }
  .mode-cards,
  .mode-cards.four-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  .mode-card {
    padding: var(--space-md) var(--space-sm);
  }
  .mode-card p {
    font-size: 12px;
  }
  .mode-icon-wrap {
    width: 44px;
    height: 44px;
  }
  .mode-icon-wrap svg {
    width: 22px;
    height: 22px;
  }
  .input-wrapper {
    flex-direction: column;
  }
  .summary-stats {
    gap: var(--space-lg);
  }
  .summary-es {
    min-width: 60px;
    font-size: 13px;
  }
  .summary-de {
    font-size: 13px;
  }
  .question-word {
    font-size: clamp(22px, 5vw, 36px);
  }
  .quiz-play,
  .quiz-config,
  .quiz-summary {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }
  .flashcard-front,
  .flashcard-back {
    padding: var(--space-lg) var(--space-md);
  }
  .flashcard-word {
    font-size: clamp(20px, 5vw, 32px);
  }
  .cloze-sentence {
    font-size: 16px;
  }
  .reading-text {
    font-size: 15px;
  }
  .srs-boxes {
    gap: 4px;
  }
  .srs-box-count {
    font-size: 15px;
  }
  .srs-box-label {
    font-size: 8px;
  }
  .flag-btn {
    font-size: 16px;
    padding: 8px 14px;
  }
  .toggle-btn {
    font-size: 12px;
    padding: 6px 12px;
  }
  .config-title {
    font-size: 13px;
  }
  .grammar-explanation p {
    font-size: 14px;
  }
}