/* ===== VARIABLES ===== */
:root {
  --color-bg: #f8f7f4;
  --color-surface: #ffffff;
  --color-surface-alt: #f0ede8;
  --color-border: #e2ddd6;
  --color-text: #1a1814;
  --color-text-muted: #6b6560;
  /* Dorado marca "Japón desde Cero" — versión oscura para texto legible sobre fondo claro */
  --color-accent: #9c7a1f;
  --color-accent-light: #faf3df;
  --color-accent-hover: #83671a;
  /* Dorado brillante fijo — solo para rellenos sólidos (botones) con texto oscuro encima */
  --color-accent-fill: #d4af37;
  --color-accent-fill-hover: #b8952c;
  /* Rojo de error — separado del dorado de marca para no confundir "incorrecto" con "destacado" */
  --color-error: #c0392b;
  --color-error-light: #fdf0ef;
  --color-error-hover: #a93226;
  --color-success: #27ae60;
  --color-success-light: #edfbf3;
  --color-warning: #e67e22;
  --color-warning-light: #fef6ed;
  --color-primary: #4a90d9;
  --color-unit-1: #4a90d9;
  --color-unit-2: #7b68ee;
  --color-unit-3: #e67e22;
  --color-unit-4: #27ae60;
  --color-unit-5: #c0392b;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.12), 0 8px 24px rgba(0,0,0,0.06);
  --font-jp: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-ui: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Bodoni Moda', 'DM Sans', serif;
  --transition: 0.18s ease;
}

/* ===== DARK MODE — variables ===== */
body.dark {
  --color-bg: #0d0b09;
  --color-surface: #1a1613;
  --color-surface-alt: #241f1a;
  --color-border: #3a342e;
  --color-text: #f0ece6;
  --color-text-muted: #9a9088;
  /* En fondo casi negro el dorado brillante ya tiene buen contraste como texto */
  --color-accent: #d4af37;
  --color-accent-light: #2a2410;
  --color-error-light: #2a1210;
  --color-success-light: #0d2318;
  --color-warning-light: #2a1b08;
}

/* Dark mode — elementos nativos del navegador */
body.dark select,
body.dark input[type="text"] {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

body.dark select option {
  background: var(--color-surface);
  color: var(--color-text);
}

/* Dark mode — furigana más visible */
body.dark rt {
  color: var(--color-accent);
  opacity: 0.85;
}

/* Dark mode — badge de gramática */
body.dark .grammar-badge {
  background: #3a1210;
  color: #e08070;
}

/* Dark mode — tarjeta flashcard */
body.dark .flashcard {
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

/* Dark mode — botones con borde */
body.dark .btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

body.dark .btn-icon {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

body.dark .btn-icon:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Dark mode — select que actúa como btn */
body.dark select.btn {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

/* Evitar flash blanco al cargar en dark mode */
body { transition: background 0.1s; }

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-ui);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* ===== NAVBAR ===== */
.navbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 1.5rem;
}

.navbar-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  height: 56px;
}

.navbar-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
  margin-right: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.navbar-brand .jp { font-family: var(--font-jp); font-size: 1rem; }

.navbar-logo {
  height: 38px;
  width: 38px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

.nav-link {
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover { background: var(--color-surface-alt); color: var(--color-text); }
.nav-link.active { background: var(--color-accent-light); color: var(--color-accent); }

.navbar-spacer { flex: 1; }

.btn-icon {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-icon:hover { border-color: var(--color-accent); color: var(--color-accent); }

.clerk-user-button-slot {
  display: flex;
  align-items: center;
}

/* ===== AUTH (Clerk) ===== */
/* Oculta el contenido hasta confirmar sesión, evitando el flash de una
   página sin autenticar. auth.js quita esta clase al terminar. */
body.auth-pending {
  visibility: hidden;
  background: var(--color-bg);
}

/* ===== LAYOUT ===== */
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.page-header p {
  color: var(--color-text-muted);
  font-size: 0.925rem;
}

/* ===== CARDS ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover { box-shadow: var(--shadow-hover); }

/* ===== UNIT GRID (home) ===== */
.units-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.unit-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--color-text);
  display: block;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.unit-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--unit-color, var(--color-accent));
}

.unit-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.unit-number {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--unit-color, var(--color-accent));
  margin-bottom: 0.5rem;
}

.unit-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.unit-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.unit-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.unit-meta span { display: flex; align-items: center; gap: 0.3rem; }

/* Progress bar dentro de unit card */
.unit-progress-bar {
  margin-top: 1rem;
  height: 5px;
  background: var(--color-surface-alt);
  border-radius: 99px;
  overflow: hidden;
}

.unit-progress-fill {
  height: 100%;
  background: var(--unit-color, var(--color-accent));
  border-radius: 99px;
  transition: width 0.4s ease;
}

/* ===== STATS ROW (home) ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ===== ACCIONES RÁPIDAS (home) ===== */
.quick-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-accent-fill);
  color: #1a1814;
}
.btn-primary:hover { background: var(--color-accent-fill-hover); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-surface-alt); }

/* ===== JAPANESE TEXT ===== */
.jp-text {
  font-family: var(--font-jp);
}

ruby {
  font-family: var(--font-jp);
  font-size: 1.1rem;
}

rt {
  font-size: 0.52em;
  color: var(--color-accent);
  opacity: 0.7;
  letter-spacing: 0.02em;
}

.romaji {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-style: italic;
  transition: opacity var(--transition);
}

body.hide-romaji .romaji { opacity: 0; pointer-events: none; }

/* ===== GRAMMAR LIST ===== */
.grammar-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.grammar-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.grammar-item-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}

.grammar-item-header:hover { background: var(--color-surface-alt); }

.grammar-badge {
  font-family: var(--font-jp);
  font-size: 1rem;
  font-weight: 700;
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.grammar-meaning {
  font-size: 0.9rem;
  font-weight: 600;
  flex: 1;
}

.grammar-toggle {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  transition: transform var(--transition);
}

.grammar-item.open .grammar-toggle { transform: rotate(180deg); }

.grammar-body {
  display: none;
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--color-border);
}

.grammar-item.open .grammar-body { display: block; }

.grammar-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin: 1rem 0 0.4rem;
}

.grammar-structure {
  font-family: var(--font-jp);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
}

.grammar-explanation {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.7;
}

.example-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.example-item {
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
}

.example-jp {
  font-family: var(--font-jp);
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.example-es {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== FLASHCARDS ===== */
.flashcard-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 0;
}

.flashcard-counter {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.flashcard {
  width: 100%;
  max-width: 500px;
  min-height: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  user-select: none;
  position: relative;
}

.flashcard:hover { transform: translateY(-2px); }

.flashcard-front { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }

.flashcard-jp {
  font-family: var(--font-jp);
  font-size: 2.5rem;
  font-weight: 700;
}

.flashcard-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 1.5rem;
}

.flashcard-back { display: none; flex-direction: column; align-items: center; gap: 0.5rem; }
.flashcard.flipped .flashcard-front { display: none; }
.flashcard.flipped .flashcard-back { display: flex; }

.flashcard-answer {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.flashcard-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.btn-fail {
  background: var(--color-error-light);
  color: var(--color-error);
  border: 1px solid #f5c6c2;
  min-width: 120px;
  justify-content: center;
}
.btn-fail:hover { background: var(--color-error); color: #fff; }

.btn-pass {
  background: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid #a8e6c1;
  min-width: 120px;
  justify-content: center;
}
.btn-pass:hover { background: var(--color-success); color: #fff; }

.flashcard-done {
  text-align: center;
  padding: 3rem 2rem;
}

.flashcard-done h2 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.flashcard-done p { color: var(--color-text-muted); margin-bottom: 1.5rem; }

/* ===== EJERCICIOS ===== */
.exercise-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
}

.exercise-question {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.exercise-sentence {
  font-family: var(--font-jp);
  font-size: 1.3rem;
  text-align: center;
  margin-bottom: 1.25rem;
  padding: 1rem;
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.option-btn {
  background: var(--color-surface-alt);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 1rem;
  font-family: var(--font-jp);
  font-size: 0.95rem;
  cursor: pointer;
  text-align: center;
  transition: all var(--transition);
  color: var(--color-text);
}

.option-btn:hover:not(:disabled) {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.option-btn.correct { border-color: var(--color-success); background: var(--color-success-light); color: var(--color-success); }
.option-btn.wrong { border-color: var(--color-error); background: var(--color-error-light); color: var(--color-error); }
.option-btn:disabled { cursor: default; }

.exercise-feedback {
  margin-top: 0.75rem;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  display: none;
}

.exercise-feedback.show { display: block; }
.exercise-feedback.correct { background: var(--color-success-light); color: var(--color-success); }
.exercise-feedback.wrong { background: var(--color-error-light); color: var(--color-error); }

/* Fill-in-the-blank */
.fill-input {
  font-family: var(--font-jp);
  font-size: 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  background: var(--color-surface);
  color: var(--color-text);
  width: 100%;
  max-width: 300px;
  display: block;
  margin: 0 auto;
  transition: border-color var(--transition);
}

.fill-input:focus { outline: none; border-color: var(--color-accent); }
.fill-input.correct { border-color: var(--color-success); }
.fill-input.wrong { border-color: var(--color-error); }

/* ===== PROGRESO ===== */
.progress-section { margin-bottom: 2rem; }

.progress-section h2 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
}

.progress-bar-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.progress-bar-label {
  font-size: 0.85rem;
  font-weight: 500;
  min-width: 80px;
}

.progress-bar-track {
  flex: 1;
  height: 8px;
  background: var(--color-surface-alt);
  border-radius: 99px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 99px;
  background: var(--color-accent);
  transition: width 0.5s ease;
}

.progress-bar-pct {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  min-width: 36px;
  text-align: right;
}

/* ===== UNIT SELECTOR ===== */
.unit-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.unit-tab {
  padding: 0.4rem 0.9rem;
  border-radius: 99px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.unit-tab:hover { border-color: var(--color-accent); color: var(--color-accent); }
.unit-tab.active { background: var(--color-accent-fill); border-color: var(--color-accent-fill); color: #1a1814; }

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--color-text-muted);
}

.empty-state .icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
.empty-state h3 { font-size: 1rem; margin-bottom: 0.35rem; color: var(--color-text); }
.empty-state p { font-size: 0.875rem; }

/* ===== LECTURA ===== */

.lectura-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.lectura-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  user-select: none;
}
.lectura-header:hover { background: var(--color-surface-alt); }

.lectura-unidad-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lectura-titulo {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.lectura-done-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-success);
  background: var(--color-success-light);
  padding: 0.2rem 0.55rem;
  border-radius: 20px;
  flex-shrink: 0;
}

.lectura-body {
  display: none;
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--color-border);
}
.lectura-item.open .lectura-body { display: block; }
.lectura-item.open .grammar-toggle { transform: rotate(180deg); }

.lectura-texto {
  margin: 1rem 0;
  line-height: 2;
}

.lectura-oracion {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  color: var(--color-text);
}

.lectura-traduccion {
  background: var(--color-surface-alt);
  border-left: 3px solid var(--color-accent);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.6;
}

.lectura-btn-traduccion {
  margin-bottom: 1.25rem;
  font-size: 0.82rem;
}

.lectura-preguntas-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
  margin-bottom: 0.9rem;
}

.lectura-pregunta {
  margin-bottom: 1.1rem;
}

.lectura-pregunta-texto {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.lectura-opciones {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.lectura-opcion {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  transition: border-color var(--transition), background var(--transition);
}
.lectura-opcion:hover { border-color: var(--color-accent); }
.lectura-opcion input[type="radio"] { accent-color: var(--color-accent); }

.lectura-opcion.correct {
  border-color: var(--color-success);
  background: var(--color-success-light);
  color: var(--color-success);
  font-weight: 600;
}
.lectura-opcion.wrong {
  border-color: var(--color-error);
  background: var(--color-error-light);
  color: var(--color-error);
}

.lectura-btn-comprobar { margin-top: 0.75rem; }

.lectura-resultado {
  margin-top: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
}
.lectura-resultado-ok {
  background: var(--color-success-light);
  color: var(--color-success);
}
.lectura-resultado-partial {
  background: var(--color-warning-light);
  color: var(--color-warning);
}
.lectura-resultado-warn {
  background: var(--color-error-light);
  color: var(--color-error);
}

/* ===== RACHA ===== */
.stat-card-streak .stat-number { color: var(--color-warning); }

/* ===== AUDIO (Web Speech API) ===== */

.example-jp-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Oculto por defecto; visible cuando el navegador tiene voz ja-JP */
.btn-speak {
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.btn-speak:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

body.speech-ja-ok .btn-speak { display: inline-flex; }

/* En flashcards, el botón va debajo del carácter principal */
.flashcard-speak {
  margin-top: 0.6rem;
  width: 32px;
  height: 32px;
}

/* ===== KANA GAME ===== */

/* Config screen */
.kana-config-card {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.kana-config-section { display: flex; flex-direction: column; gap: 0.6rem; }
.kana-config-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.kana-choices { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.kana-choices-col { flex-direction: column; }

.kana-choice-btn {
  padding: 0.55rem 1.1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}
.kana-choice-btn:hover:not(.disabled) { border-color: var(--color-accent); }
.kana-choice-btn.active {
  border-color: var(--color-accent-fill);
  background: var(--color-accent-fill);
  color: #1a1814;
}
.kana-choice-btn.disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.kana-best-record {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.65rem 0.9rem;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
}
.kana-record-label { color: var(--color-text-muted); font-weight: 400; margin-right: 0.2rem; }
.kana-record-item { font-variant-numeric: tabular-nums; }

.kana-start-btn { align-self: stretch; padding: 0.8rem; font-size: 1rem; }

/* Game screen */
.kana-game-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.kana-progress-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.kana-progress-track {
  flex: 1;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}

.kana-progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 3px;
  width: 0%;
  transition: width 0.15s ease;
}

.kana-progress-text {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.kana-timer {
  font-size: 1rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
  min-width: 5ch;
  text-align: right;
}

.kana-game-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.kana-card {
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  user-select: none;
}

.kana-char {
  font-size: 7rem;
  line-height: 1;
  color: var(--color-text);
  font-family: var(--font-jp);
}

.kana-input-field {
  width: 100%;
  max-width: 280px;
  padding: 0.75rem 1rem;
  font-size: 1.25rem;
  text-align: center;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.15s, background 0.15s;
  font-family: var(--font-ui);
}
.kana-input-field:focus { border-color: var(--color-accent); }
.kana-input-field.kana-correct {
  border-color: var(--color-success);
  background: var(--color-success-light);
}
.kana-input-field.kana-wrong {
  border-color: var(--color-error);
  background: var(--color-error-light);
  animation: kana-shake 0.32s ease;
}

@keyframes kana-shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-7px); }
  60%       { transform: translateX(7px); }
  80%       { transform: translateX(-3px); }
}

.kana-input-hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Results screen */
.kana-results-card {
  max-width: 400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.kana-results-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-success-light);
  color: var(--color-success);
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.kana-results-title { font-size: 1.4rem; font-weight: 700; margin: 0; }

.kana-stats-row {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.kana-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.kana-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
}

.kana-stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
}

.kana-pb-badge {
  padding: 0.45rem 1rem;
  background: var(--color-warning-light);
  color: var(--color-warning);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
}

.kana-results-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
}
.kana-results-actions .btn { flex: 1; min-width: 160px; }

/* ===== VOCABULARIO ===== */
.vocab-unit-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  border-left: 4px solid transparent;
  padding: 0.65rem 0.85rem;
  margin: 1.75rem 0 0.5rem;
  background: var(--color-surface);
  border-radius: 0 6px 6px 0;
}
.vocab-unit-num {
  font-weight: 700;
  font-size: 0.9rem;
}
.vocab-unit-title {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex: 1;
}
.vocab-unit-count {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.vocab-table {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}
.vocab-row {
  display: grid;
  grid-template-columns: 1fr minmax(90px, auto) 1fr 36px;
  align-items: center;
  gap: 0;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--color-border);
  transition: background 0.12s;
}
.vocab-row:last-child { border-bottom: none; }
.vocab-row:hover { background: var(--color-surface); }
.vocab-row.vocab-highlight {
  animation: vocab-flash 2s ease;
}
@keyframes vocab-flash {
  0%,100% { background: transparent; }
  15%,55% { background: color-mix(in srgb, var(--color-primary) 12%, transparent); }
}
.vocab-cell-jp {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.vocab-kana {
  font-size: 1.05rem;
  font-weight: 600;
}
.vocab-kanji {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.vocab-cell-romaji {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  padding-right: 0.75rem;
}
.vocab-cell-es {
  font-size: 0.88rem;
}
.vocab-cell-actions {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  justify-content: flex-end;
}
.vocab-reviewed-dot {
  font-size: 0.75rem;
  color: var(--color-success);
  font-weight: 700;
}

/* ===== EXAMEN ===== */

/* Config */
.exam-config-card { max-width: 600px; margin: 0 auto; }

.exam-rules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}
.exam-rule-item {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.7rem 0.85rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}
.exam-rule-icon { font-size: 1.1rem; flex-shrink: 0; line-height: 1.4; }
.exam-rule-item strong { display: block; font-size: 0.85rem; margin-bottom: 0.1rem; }
.exam-rule-item span { font-size: 0.77rem; color: var(--color-text-muted); }

.exam-best-badge {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 0.35rem 0.9rem;
  margin-bottom: 1.25rem;
}

.exam-name-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.exam-name-input {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.15s;
}
.exam-name-input:focus { border-color: var(--color-primary); }

/* Exam header bar */
.exam-header-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding: 0.7rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
}
.exam-progress-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.exam-progress-track {
  flex: 1;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}
.exam-progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}
.exam-q-num {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.exam-timer {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  min-width: 4.8rem;
  text-align: right;
}
.exam-timer.timer-warn {
  color: #e74c3c;
  animation: timer-pulse 1s ease-in-out infinite;
}
@keyframes timer-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.55; }
}

/* Question card */
.exam-question-card { margin-bottom: 1.25rem; }

.exam-q-type {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 0.85rem;
}
.exam-q-type-vocab {
  background: rgba(74,144,217,.14);
  color: var(--color-primary);
}
.exam-q-type-grammar {
  background: rgba(39,174,96,.14);
  color: var(--color-success);
}

.exam-q-jp {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.9;
  margin-bottom: 0.35rem;
}
.exam-q-jp ruby rt {
  font-size: 0.42em;
  color: var(--color-accent);
}
.exam-q-text {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.exam-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}
.exam-option {
  padding: 0.8rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.88rem;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
  line-height: 1.35;
}
.exam-option:hover {
  border-color: var(--color-primary);
  background: var(--color-surface);
}
.exam-option.selected {
  border-color: var(--color-primary);
  background: rgba(74,144,217,.1);
  color: var(--color-primary);
  font-weight: 600;
}

/* Nav row */
.exam-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.exam-answered-info {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Results */
.exam-result-summary {
  text-align: center;
  padding: 2rem 1.5rem;
  margin-bottom: 1.75rem;
}
.exam-result-badge {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.exam-result-badge.pass { color: var(--color-success); }
.exam-result-badge.fail { color: var(--color-error); }
.exam-score-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.75rem;
}
.exam-score-big {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
}
.exam-score-pct {
  font-size: 1.6rem;
  color: var(--color-text-muted);
}

/* Certificate */
.cert-section-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.cert-canvas-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 0.85rem;
}
#cert-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 3px;
}
.cert-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

/* Print cert (hidden on screen, shown in @media print) */
.cert-print { display: none; }

/* Review */
.exam-review-section {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.exam-review-section h2 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}
.exam-review-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  margin-bottom: 0.3rem;
  border-left: 3px solid transparent;
}
.exam-review-item.correct {
  border-left-color: var(--color-success);
  background: rgba(39,174,96,.07);
}
.exam-review-item.wrong {
  border-left-color: var(--color-error);
  background: rgba(192,57,43,.07);
}
.exam-review-q {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.exam-review-n {
  font-size: 0.73rem;
  color: var(--color-text-muted);
  min-width: 1.6rem;
}
.exam-review-jp { font-size: 0.92rem; }
.exam-review-badge {
  font-size: 0.62rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 10px;
  margin-left: auto;
  flex-shrink: 0;
}
.exam-review-badge.vocab   { background: rgba(74,144,217,.15); color: var(--color-primary); }
.exam-review-badge.grammar { background: rgba(39,174,96,.15);  color: var(--color-success); }
.exam-review-ans {
  font-size: 0.82rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-left: 2.1rem;
}
.ans-ok           { color: var(--color-success); font-weight: 600; }
.ans-err          { color: var(--color-error); text-decoration: line-through; }
.ans-correct-text { color: var(--color-success); font-weight: 600; }

/* ── @media print — certificado ── */
@media print {
  body.printing-cert .navbar,
  body.printing-cert .page-header,
  body.printing-cert #screen-config,
  body.printing-cert #screen-exam,
  body.printing-cert .exam-result-summary,
  body.printing-cert .cert-section-title,
  body.printing-cert .cert-canvas-wrap,
  body.printing-cert .cert-buttons,
  body.printing-cert .exam-review-section,
  body.printing-cert #btn-retry { display: none !important; }

  body.printing-cert .cert-print {
    display: flex !important;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #fffef5;
    padding: 1.5cm;
    box-sizing: border-box;
  }
  .cert-print-inner {
    border: 7px solid #7a1515;
    outline: 2px solid #c8a84b;
    outline-offset: -14px;
    padding: 1.5cm 2cm;
    text-align: center;
    width: 100%;
    max-width: 18cm;
    background: #fffef5;
    color: #1a1a1a;
    font-family: 'Inter', sans-serif;
  }
  .cert-print-seal {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: #7a1515;
    color: #fffef5;
    font-size: 1.1rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.9rem;
    border: 2px solid #c8a84b;
  }
  .cert-print-title {
    font-size: 1.55rem;
    font-weight: bold;
    margin: 0 0 0.25rem;
    color: #1a1a1a;
  }
  .cert-print-subtitle {
    font-size: 0.8rem;
    color: #666;
    margin: 0 0 0.6rem;
  }
  .cert-print-hr {
    border: none;
    border-top: 1px solid #c8a84b;
    margin: 0.4rem 1.5cm;
  }
  .cert-print-label {
    font-size: 0.7rem;
    color: #999;
    margin: 0.4rem 0 0.15rem;
  }
  .cert-print-name {
    font-size: 1.7rem;
    font-weight: bold;
    font-style: italic;
    color: #7a1515;
    margin: 0 0 0.4rem;
  }
  .cert-print-score {
    font-size: 0.88rem;
    font-weight: 600;
    margin: 0.4rem 0 0.2rem;
  }
  .cert-print-sub {
    font-size: 0.75rem;
    color: #666;
    margin: 0 0 0.6rem;
  }
  .cert-print-deco {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.95rem;
    color: #c8a84b;
    margin: 0.4rem 0;
  }
  .cert-print-date {
    font-size: 0.7rem;
    color: #999;
    margin: 0.3rem 0 0.8rem;
  }
  .cert-print-sig-block { margin-top: 0.5rem; }
  .cert-print-sig-line {
    border: none;
    border-top: 1px solid #c8a84b;
    margin: 0 3cm;
  }
  .cert-print-org {
    font-size: 0.65rem;
    color: #999;
    margin: 0.25rem 0 0;
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .options-grid { grid-template-columns: 1fr; }
  .flashcard-jp { font-size: 1.8rem; }
  .flashcard-actions { flex-direction: column; }
  .page { padding: 1.25rem 1rem; }
  .navbar { padding: 0 1rem; }
  .unit-tab { font-size: 0.75rem; padding: 0.35rem 0.7rem; }
  .kana-card { width: 160px; height: 160px; }
  .kana-char { font-size: 5.5rem; }
  .vocab-row { grid-template-columns: 1fr 1fr 32px; }
  .vocab-cell-romaji { display: none; }
  .vocab-kana { font-size: 0.95rem; }
  .exam-rules-grid { grid-template-columns: 1fr; }
  .exam-options { grid-template-columns: 1fr; }
  .exam-q-jp { font-size: 1.55rem; }
  .exam-timer { font-size: 1.1rem; }
  .exam-score-big { font-size: 2.4rem; }
  .kanji-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .kanji-card.open { grid-column: span 2; }
  .kj-options { grid-template-columns: 1fr; }
}

/* ===== MODO KANA / KANJI — selector segmentado ===== */

.kj-mode-selector {
  display: flex;
  gap: 0;
  margin-bottom: 1.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  width: fit-content;
}

.kj-mode-btn {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 1.5rem;
  border: none;
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.kj-mode-btn:first-child { border-right: 1.5px solid var(--color-border); }
.kj-mode-btn.active { background: var(--color-text); color: var(--color-bg); }
.kj-mode-btn:hover:not(.active) { background: var(--color-surface-alt); color: var(--color-text); }

/* ===== KANJI GAME — opciones múltiple ===== */

.kj-config-desc {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin: 0 0 1.25rem;
  line-height: 1.5;
}

.kj-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  margin-top: 1.25rem;
  width: 100%;
  max-width: 480px;
}

.kj-option-btn {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease, color 0.12s ease;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  line-height: 1.3;
}

.kj-option-btn:hover:not(:disabled) {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.kj-option-btn.correct { border-color: var(--color-success); background: var(--color-success-light); color: var(--color-success); }
.kj-option-btn.wrong   { border-color: var(--color-error); background: var(--color-error-light); color: var(--color-error); }
.kj-option-btn:disabled { cursor: not-allowed; }

.kj-option-num {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--color-text-muted);
  min-width: 0.8rem;
  flex-shrink: 0;
}

.kj-option-btn.correct .kj-option-num,
.kj-option-btn.wrong .kj-option-num { color: inherit; }

/* ===== KANJI ===== */

.kanji-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.kanji-search-input {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  width: 220px;
  outline: none;
  transition: border-color var(--transition);
}
.kanji-search-input:focus { border-color: var(--color-accent); }

.kanji-group-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.kanji-group-tab {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.28rem 0.65rem;
  border: 1.5px solid var(--color-border);
  border-radius: 20px;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}
.kanji-group-tab:hover { border-color: var(--gtab-color, var(--color-accent)); color: var(--gtab-color, var(--color-accent)); }
.kanji-group-tab.active { background: var(--gtab-color, var(--color-text)); border-color: var(--gtab-color, var(--color-text)); color: #fff; }
.kanji-group-tab:first-child { --gtab-color: var(--color-text); }
.kanji-group-tab:first-child.active { background: var(--color-text); border-color: var(--color-text); color: var(--color-bg); }

.kanji-count-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-left: auto;
}

.kanji-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.kanji-card {
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  cursor: pointer;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  position: relative;
  min-height: 100px;
}
.kanji-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.kanji-card.open { grid-column: span 2; border-color: var(--color-accent); box-shadow: var(--shadow-hover); }
.kanji-card.seen { background: var(--color-success-light); }
.kanji-card.seen.open { background: var(--color-surface); }

.kanji-card-front {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}
.kanji-card.open .kanji-card-front { display: none; }

.kanji-char {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1;
}
.kanji-card-front .kanji-sig {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.3;
}

.kanji-seen-dot {
  position: absolute;
  top: 0.5rem;
  right: 0.55rem;
  font-size: 0.7rem;
  color: var(--color-success);
  font-weight: 700;
}

.kanji-card-back { display: none; }
.kanji-card.open .kanji-card-back {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1.25rem;
}

.kanji-readings {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.kanji-reading-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.kanji-reading-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-text-muted);
  width: 1.1rem;
  flex-shrink: 0;
}

.kanji-reading-val {
  font-size: 0.9rem;
  color: var(--color-text);
}

.kanji-ejemplos-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.kanji-ejemplo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.kanji-ej-word {
  font-size: 1rem;
}

.kanji-ej-romaji {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.kanji-ej-es {
  font-size: 0.8rem;
  color: var(--color-text);
}

.kanji-ej-speak {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: 0.1rem;
  display: flex;
  align-items: center;
  border-radius: 4px;
  transition: color var(--transition);
}
.kanji-ej-speak:hover { color: var(--color-accent); }

.kanji-grupo-badge {
  grid-column: span 2;
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  align-self: start;
  justify-self: start;
}

/* Kanji progress bars in progreso.html */
.kanji-progress-grupo {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.6rem;
  margin-bottom: 0.25rem;
}