.abc-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)) !important;
  gap: 0.8rem !important;
  padding: 1rem 0;
  align-items: stretch;
}

.alphabet-card {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.2rem 0.5rem;
  text-align: center;
  transition: all var(--transition-bounce);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  height: 100%;
  min-height: 140px;
  box-shadow: 0 8px 20px -5px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.alphabet-card::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.05), transparent);
  transform: rotate(30deg);
  pointer-events: none;
  transition: 0.6s;
}

.alphabet-card:hover::before {
  left: 100%;
  top: 100%;
}

.alphabet-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

[data-theme="light"] .alphabet-card {
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

.alphabet-card:hover {
  transform: translateY(-12px) scale(1.02);
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  box-shadow: 0 25px 45px -10px rgba(0, 0, 0, 0.6), 0 0 20px var(--accent-glow);
}

[data-theme="light"] .alphabet-card:hover {
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1), 0 0 20px var(--accent-glow);
}

.letter-main {
  font-family: 'Outfit', 'Montserrat', sans-serif;
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 0.8;
  margin-bottom: 0.5rem;
  transition: transform var(--transition-normal);
  background: linear-gradient(135deg, #ffffff, #94a3b8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .letter-main {
  background: linear-gradient(135deg, #1e293b, #475569);
  -webkit-background-clip: text;
  background-clip: text;
}

.alphabet-card:hover .letter-main {
  transform: scale(1.1) rotate(-2deg);
  background: #fff;
  -webkit-background-clip: text;
  background-clip: text;
}
[data-theme="light"] .alphabet-card:hover .letter-main {
  background: var(--text-main);
  -webkit-background-clip: text;
  background-clip: text;
}

.phonetic-badge {
  background: var(--bg-sub-item);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 700;
  display: inline-block;
  margin: 5px 0;
  text-transform: uppercase;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  transition: all 0.3s;
}

[data-theme="light"] .phonetic-badge {
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.alphabet-card:hover .phonetic-badge {
  color: var(--accent-primary);
  border-color: var(--accent-glow);
  background: rgba(129, 140, 248, 0.1);
}

.sound-tags {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3rem;
}

.sound-tags .sound-chip {
  font-size: 0.8rem;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 3px 8px;
  border-radius: 8px;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.sound-tags .sound-chip:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--accent-glow);
}

[data-theme="light"] .sound-tags .sound-chip {
  background: rgba(255, 255, 255, 0.5);
  color: var(--text-main);
}
[data-theme="light"] .sound-tags .sound-chip:hover {
  color: #fff;
}

.abc-toggle-container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin: 0 auto;
}

.toggle-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}