.match-board {
    display: flex;
    justify-content: space-between;
    margin: 20px 0;
    gap: 20px;
}

.column {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 48%;
}

.match-item {
    padding: 15px;
    border: 4px solid #e0e0e0;
    border-radius: 12px;
    background: #fafafa;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    box-shadow: 0 4px 0 #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
}

.match-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 0 #d0d0d0;
}

.match-item.selected {
    border-color: var(--secondary-color);
    background: #e3f2fd;
    box-shadow: 0 4px 0 #1976D2;
}

.match-item.matched {
    border-color: var(--correct-color);
    background: #e8f5e9;
    color: var(--correct-color);
    pointer-events: none;
    opacity: 0.6;
    box-shadow: none;
    transform: translateY(4px);
}

.match-item.wrong-shake {
    animation: shake 0.4s;
    border-color: var(--wrong-color);
    background: #ffebee;
}

.sign-item {
    font-size: 35px; /* Sinais maiores */
}

@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
    100% { transform: translateX(0); }
}

.nav-btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #9e9e9e;
    color: white;
    border-radius: 10px;
    font-family: cursive;
    margin-top: 10px;
    transition: opacity 0.2s;
}

.nav-btn:hover {
    opacity: 0.8;
}